阅读说明：本技术 一种具有优异光传输性能的石英光纤及其制备方法 (Quartz optical fiber with excellent optical transmission performance and preparation method thereof ) 是由 嵇亚明 于 2020-12-16 设计创作，主要内容包括：一种具有优异光传输性能的石英光纤及其制备方法,所述石英光纤是先在石英基片上涂覆有偶氮苯聚合物溶液得到复合石英,然后再在复合石英上涂覆有金刚石颗粒溶液得到石英光纤；所述偶氮苯聚合物溶液是将偶氮苯聚合物溶解在环戊酮中配成25-35mg/mL的溶液,所述偶氮苯聚合物,按摩尔百分比计,主要由以下组分构成：甲基丙烯酸异丁基POSS 35-45%、甲基丙烯酸三氟乙酯30-50%、偶氮苯单体6-[4-(4-氰基偶氮苯基)苯氧基]乙基甲基丙烯酸20-30%。本发明所述的具有优异光传输性能的石英光纤及其制备方法,配方设置合理,制备工艺简单,制得的石英光纤具有优异光传输性能,易于大规模生产,具有易加工处理、韧性好、柔性高、更高的杨氏模量和热光系数的优点,应用前景广泛。(A quartz optical fiber with excellent optical transmission performance and a preparation method thereof, wherein the quartz optical fiber is prepared by firstly coating a quartz substrate with an azobenzene polymer solution to obtain a composite quartz, and then coating a diamond particle solution on the composite quartz to obtain a quartz optical fiber; the azobenzene polymer solution is prepared by dissolving azobenzene polymer in cyclopentanone to prepare 25-35mg/mL, and the azobenzene polymer mainly comprises the following components in percentage by mole: 35-45% of isobutyl methacrylate POSS, 30-50% of trifluoroethyl methacrylate and 20-30% of azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate. The quartz optical fiber with excellent light transmission performance and the preparation method thereof have the advantages of reasonable formula setting, simple preparation process, excellent light transmission performance of the prepared quartz optical fiber, easy large-scale production, easy processing, good toughness, high flexibility, higher Young modulus and thermo-optic coefficient and wide application prospect.)

1. A quartz optical fiber with excellent optical transmission performance is characterized in that the quartz optical fiber is obtained by firstly coating a quartz substrate with an azobenzene polymer solution to obtain composite quartz and then coating a composite quartz with a diamond particle solution to obtain the quartz optical fiber; the azobenzene polymer solution is prepared by dissolving azobenzene polymer in cyclopentanone to prepare 25-35mg/mL, and the azobenzene polymer mainly comprises the following components in percentage by mole: 35-45% of isobutyl methacrylate POSS, 30-50% of trifluoroethyl methacrylate and 20-30% of azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate; the diamond particle solution mainly comprises the following components in parts by weight: 80-90 parts of dimethyl sulfoxide, 1-2 parts of diamond powder and 0.5-1.5 parts of polyvinyl alcohol.

2. The silica optical fiber having excellent light transmission property according to claim 1, wherein the diamond powder has an average particle diameter of 60 to 80 nm; the thickness of the azobenzene polymer solution coated on the quartz substrate is 0.2-0.5 mm; the coating thickness of the diamond particle solution is 0.3-0.8 mm.

3. The method for producing a silica optical fiber having excellent light transmission property according to any one of claims 1 to 2, characterized by comprising the steps of:

(1) preparation of azobenzene polymer: according to the formula, isobutyl methacrylate POSS, trifluoroethyl methacrylate and azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylic acid are simultaneously dissolved in tetrahydrofuran, and an initiator is added for initiating a free radical polymerization reaction; after the free radical polymerization reaction is finished, slowly dripping the solution into a methanol solvent which is subjected to freezing treatment in advance, and generating a precipitate under magnetic stirring; dissolving the precipitate with tetrahydrofuran, repeating the steps for 3-5 times, and drying the obtained precipitate in vacuum to obtain an azobenzene polymer;

(2) preparation of azobenzene polymer solution: dissolving the azobenzene polymer in cyclopentanone to prepare 25-35mg/mL azobenzene polymer solution for later use;

(3) preparation of diamond particle solution: according to the formula, mixing polyvinyl alcohol and dimethyl sulfoxide, heating to 80-95 ℃, ultrasonically mixing uniformly, adding diamond powder, and mixing uniformly to obtain a diamond particle solution for later use;

(4) preparation of the silica optical fiber: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, and drying by using nitrogen; firstly, coating azobenzene polymer solution on a quartz substrate to obtain composite quartz, and then coating diamond particle solution on the composite quartz to obtain the quartz optical fiber.

4. The method of claim 3, wherein the initiator is azobisisobutyronitrile, the molar ratio of the initiator to the azobenzene polymer is 100:2-3, and the tetrahydrofuran is distilled.

5. The method of manufacturing a silica optical fiber having excellent light transmission properties according to claim 3, wherein the radical polymerization in the step (1) is performed in a sealed vessel filled with nitrogen gas, the reaction temperature of the radical polymerization is 60 to 70 ℃, and the reaction time is 70 to 80 hours.

6. The method of manufacturing a silica optical fiber having excellent light transmission properties according to claim 3, wherein the manufacturing of the silica optical fiber in the step (4) comprises coating an azobenzene polymer, coating diamond particles; the azobenzene-coated polymer comprises the following steps:

(1) sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, drying the quartz substrate with nitrogen, and protecting the quartz substrate in a sealed container filled with nitrogen;

(2) and (3) dripping the prepared azobenzene polymer solution on a quartz substrate, and keeping for 16-24 hours after the solution is completely coated to obtain the composite quartz.

7. The method of manufacturing a silica optical fiber having excellent light transmission property according to claim 6, wherein said coating diamond particles comprises the steps of

(1) Dripping diamond particle solution on the composite quartz, keeping for 10-12h after completely coating, cleaning with deionized water, and drying;

(2) drying, putting into hot filament chemical vapor deposition equipment, taking acetone as a carbon source, and carrying the acetone into a reaction chamber in a hydrogen bubbling mode, wherein the flow ratio of hydrogen to acetone is 200: 40-90, the distance between the hot wire and the quartz optical fiber is 7-10 mm, the reaction power is 1600-2300W, the working pressure is 1.5-3.5 Kpa, the growth time of the diamond particles is 10-30 min, and after the growth is finished, the temperature is reduced to room temperature under the condition of not introducing hydrogen to obtain the quartz optical fiber.

Technical Field

The invention belongs to the technical field of quartz optical fibers, and particularly relates to a quartz optical fiber with excellent optical transmission performance and a preparation method thereof.

Background

The quartz optical fiber is widely applied to optical fiber sensors, and the optical fiber sensors have many advantages, such as light weight, strong anti-electromagnetic interference capability, corrosion resistance, high temperature and high pressure resistance, high equipment integration degree and the like, and are widely applied to the fields of biomedicine, chemical environmental protection, electric power industry, military and intelligent application.

At present, with the development of polymer synthesis technology, compared with an optical fiber made of a quartz material, a composite optical fiber combining a polymer and quartz has the advantages of light weight, easy processing, good toughness, high flexibility, higher young's modulus and thermo-optic coefficient, and some polymer materials with special structures also have excellent optical and electrical properties, and can realize multi-field applications. The polymer-silica composite optical fiber of the prior art has the following problems: there is a problem of phase separation at the interface between the polymer and the silica fiber due to incompatibility between the polymer organic material and the fiber inorganic silica material. Therefore, there is a need to develop a silica optical fiber with excellent optical transmission performance and a preparation process thereof, which solves the incompatibility between the polymer organic material and the optical fiber inorganic silica material in the compounding process and obtains a silica optical fiber with excellent optical transmission performance.

Chinese patent application No. CN201810434976.8 discloses a lithium niobate doped silica optical fiber, which is prepared by adding high-temperature gasification lithium niobate through an improved chemical vapor deposition process technology. The prepared lithium niobate doped silica fiber structure is a core layer lithium niobate doped matching structure or an inner cladding layer lithium niobate doped structure or a structure with both the core layer and the inner cladding layer doped with lithium niobate, and does not compound a polymer organic material and an optical fiber inorganic silica material, improve the compatibility of the polymer and the silica and improve the optical transmission performance.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects, the invention aims to provide the quartz optical fiber with excellent optical transmission performance and the preparation method thereof, the formula is reasonable in arrangement, the preparation process is simple, the prepared quartz optical fiber has excellent optical transmission performance, is easy for large-scale production, has the advantages of easiness in processing, good toughness, high flexibility, higher Young modulus and thermo-optic coefficient and wide application prospect.

The purpose of the invention is realized by the following technical scheme:

a quartz optical fiber with excellent optical transmission performance is characterized in that a quartz substrate is coated with an azobenzene polymer solution to obtain a composite quartz, and then the composite quartz is coated with a diamond particle solution to obtain the quartz optical fiber; the azobenzene polymer solution is prepared by dissolving azobenzene polymer in cyclopentanone to prepare 25-35mg/mL, and the azobenzene polymer mainly comprises the following components in percentage by mole: 35-45% of isobutyl methacrylate POSS, 30-50% of trifluoroethyl methacrylate and 20-30% of azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate; the diamond particle solution mainly comprises the following components in parts by weight: 80-90 parts of dimethyl sulfoxide, 1-2 parts of diamond powder and 0.5-1.5 parts of polyvinyl alcohol.

The quartz optical fiber with excellent light transmission performance is reasonable in formula setting, has the advantages of light weight, easiness in processing, good toughness, high flexibility and higher Young modulus and thermo-optic coefficient by coating the azobenzene polymer solution, and improves the light transmission performance by modulating the light intensity and polarization state of the transmitted light of the quartz optical fiber by utilizing the photoinduced isomerism and photoinduced orientation of the azobenzene polymer; by coating the diamond particle solution, the diamond particles have excellent luminescence property, photons can be better generated, and the diamond particles and the quartz optical fiber are effectively compounded, so that the light transmission property is further improved.

The isobutyl methacrylate POSS in the azobenzene polymer has a rigid cubic cage structure, a large number of cavities exist, the refractive index of the azobenzene polymer is low due to the existence of air, and the isobutyl methacrylate POSS has a monodisperse nano size and good reactivity and solubility in an organic solvent, can be used as a modification center to perform free radical polymerization with trifluoroethyl methacrylate and an azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate, has good cooperativity, can improve the thermal property, the mechanical property and the flame retardance of the azobenzene polymer, and realizes the functionalization of the azobenzene polymer.

Further, in the above silica optical fiber having excellent light transmission property, the diamond powder has an average particle diameter of 60 to 80 nm; the thickness of the azobenzene polymer solution coated on the quartz substrate is 0.2-0.5 mm; the coating thickness of the diamond particle solution is 0.3-0.8 mm.

The invention also relates to a preparation method of the quartz optical fiber with excellent optical transmission performance, which comprises the following steps:

(1) preparation of azobenzene polymer: according to the formula, isobutyl methacrylate POSS, trifluoroethyl methacrylate and azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylic acid are simultaneously dissolved in tetrahydrofuran, and an initiator is added for initiating a free radical polymerization reaction; after the free radical polymerization reaction is finished, slowly dripping the solution into a methanol solvent which is subjected to freezing treatment in advance, and generating a precipitate under magnetic stirring; dissolving the precipitate with tetrahydrofuran, repeating the steps for 3-5 times, and drying the obtained precipitate in vacuum to obtain an azobenzene polymer;

(2) preparation of azobenzene polymer solution: dissolving the azobenzene polymer in cyclopentanone to prepare 25-35mg/mL azobenzene polymer solution for later use;

(3) preparation of diamond particle solution: according to the formula, mixing polyvinyl alcohol and dimethyl sulfoxide, heating to 80-95 ℃, ultrasonically mixing uniformly, adding diamond powder, and mixing uniformly to obtain a diamond particle solution for later use;

(4) preparation of the silica optical fiber: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, and drying by using nitrogen; firstly, coating azobenzene polymer solution on a quartz substrate to obtain composite quartz, and then coating diamond particle solution on the composite quartz to obtain the quartz optical fiber.

Further, in the above method for preparing a silica optical fiber having excellent optical transmission performance, the initiator is azobisisobutyronitrile, the molar ratio of the initiator to the azobenzene polymer is 100:2-3, and the tetrahydrofuran needs to be distilled.

Further, in the above method for manufacturing a silica optical fiber having excellent optical transmission properties, the radical polymerization reaction in the step (1) is performed in a sealed container filled with nitrogen, the reaction temperature of the radical polymerization reaction is 60 to 70 ℃, and the reaction time is 70 to 80 hours.

Further, in the above method for manufacturing a silica optical fiber having excellent light transmission performance, the manufacturing of the silica optical fiber in the step (4) includes coating an azobenzene polymer, coating diamond particles; the azobenzene-coated polymer comprises the following steps:

(1) sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, drying the quartz substrate with nitrogen, and protecting the quartz substrate in a sealed container filled with nitrogen;

(2) and (3) dripping the prepared azobenzene polymer solution on a quartz substrate, and keeping for 16-24 hours after the solution is completely coated to obtain the composite quartz.

Further, the above method for manufacturing a silica optical fiber having excellent light transmission properties, the coated diamond particles, comprises the steps of

(1) Dripping diamond particle solution on the composite quartz, keeping for 10-12h after completely coating, cleaning with deionized water, and drying;

(2) drying, putting into hot filament chemical vapor deposition equipment, taking acetone as a carbon source, and carrying the acetone into a reaction chamber in a hydrogen bubbling mode, wherein the flow ratio of hydrogen to acetone is 200: 40-90, the distance between the hot wire and the quartz optical fiber is 7-10 mm, the reaction power is 1600-2300W, the working pressure is 1.5-3.5 Kpa, the growth time of the diamond particles is 10-30 min, and after the growth is finished, the temperature is reduced to room temperature under the condition of not introducing hydrogen to obtain the quartz optical fiber.

According to the preparation method of the quartz optical fiber with excellent optical transmission performance, the preparation steps are reasonably set, the quartz optical fiber is coated with the azobenzene polymer solution, the azobenzene polymer solution has good binding force with the quartz substrate, and the problems of incompatibility between the polymer and quartz and phase separation at an interface are solved; coating a diamond particle solution on the composite quartz, adopting a mode of firstly physically combining and then chemically combining, enabling the composite quartz and diamond particles to be physically combined through dimethyl sulfoxide and polyvinyl alcohol, then adopting a chemical vapor deposition method to grow the diamond particles on the surface of the composite quartz, and enabling the diamond particles and the composite quartz to be combined in a chemical bonding mode, so that the bonding force is stronger, and the diamond particles are not easy to separate and fall off; the preparation steps are high in controllability, simple to operate, suitable for large-scale production, good in economical efficiency and wide in application prospect.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the quartz optical fiber with excellent light transmission performance, the quartz optical fiber has the advantages of light weight, easiness in processing, good toughness, high flexibility and higher Young modulus and thermo-optic coefficient by coating the azobenzene polymer solution, and the light transmission performance is improved by modulating the light intensity and polarization state of the quartz optical fiber by utilizing the photoinduced isomerism and photoinduced orientation of the azobenzene polymer; by coating the diamond particle solution, the diamond particles have excellent luminescence property, photons can be better generated, and the diamond particles and the quartz optical fiber are effectively compounded, so that the light transmission property is further improved;

(2) the preparation method of the quartz optical fiber with excellent optical transmission performance, disclosed by the invention, has the advantages that the preparation steps are reasonably arranged, the quartz optical fiber is coated with the azobenzene polymer solution, the azobenzene polymer solution has good binding force with the quartz substrate, and the problems of incompatibility between the polymer and quartz and phase separation at an interface are solved; coating a diamond particle solution on the composite quartz, adopting a mode of firstly physically combining and then chemically combining, enabling the composite quartz and diamond particles to be physically combined through dimethyl sulfoxide and polyvinyl alcohol, then adopting a chemical vapor deposition method to grow the diamond particles on the surface of the composite quartz, and enabling the diamond particles and the composite quartz to be combined in a chemical bonding mode, so that the bonding force is stronger, and the diamond particles are not easy to separate and fall off; the preparation steps are simple and controllable, have high flexibility, can be used for large-scale production, and have good economical efficiency and wide application prospect.

Detailed Description

In the following, the technical solutions in the embodiments of the present invention are clearly and completely described in the embodiments with reference to specific experimental data, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following embodiments provide a silica optical fiber having excellent optical transmission performance and a method for preparing the same, wherein the silica optical fiber is prepared by coating a silica substrate with an azobenzene polymer solution to obtain a composite silica, and then coating a diamond particle solution on the composite silica to obtain a silica optical fiber; the azobenzene polymer solution is prepared by dissolving azobenzene polymer in cyclopentanone to prepare 25-35mg/mL, and the azobenzene polymer mainly comprises the following components in percentage by mole: 35-45% of isobutyl methacrylate POSS, 30-50% of trifluoroethyl methacrylate and 20-30% of azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate; the diamond particle solution mainly comprises the following components in parts by weight: 80-90 parts of dimethyl sulfoxide, 1-2 parts of diamond powder and 0.5-1.5 parts of polyvinyl alcohol

Further, the average particle size of the diamond powder is 60-80 nm; the thickness of the azobenzene polymer solution coated on the quartz substrate is 0.2-0.5 mm; the coating thickness of the diamond particle solution is 0.3-0.8 m.

Example 1

The preparation method of the quartz optical fiber with excellent light transmission performance comprises the following steps:

(1) preparation of azobenzene polymer: according to the formula, the azobenzene polymer mainly comprises the following components in percentage by mol: 35% of isobutyl methacrylate POSS, 45% of trifluoroethyl methacrylate and 20% of azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate;

dissolving isobutyl methacrylate POSS, trifluoroethyl methacrylate and azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylic acid in tetrahydrofuran simultaneously, and adding an initiator to carry out initiation of free radical polymerization; the initiator is azobisisobutyronitrile, the molar ratio of the initiator to the azobenzene polymer is 50:1, and the tetrahydrofuran needs to be distilled; the free radical polymerization reaction is carried out in a sealed container filled with nitrogen, the reaction temperature of the free radical polymerization reaction is 60 ℃, and the reaction time is 72 hours;

after the free radical polymerization reaction is finished, slowly dripping the solution into a methanol solvent which is subjected to freezing treatment in advance, and generating a precipitate under magnetic stirring; dissolving the precipitate with tetrahydrofuran, repeating the steps for 3-5 times, and drying the obtained precipitate in vacuum to obtain an azobenzene polymer;

(2) preparation of azobenzene polymer solution: dissolving the azobenzene polymer in cyclopentanone to prepare a 25mg/mL azobenzene polymer solution for later use;

(3) preparation of diamond particle solution: according to the formula, the diamond particle solution mainly comprises the following components in parts by weight: 85 parts of dimethyl sulfoxide, 1.5 parts of diamond powder and 1.5 parts of polyvinyl alcohol; mixing polyvinyl alcohol and dimethyl sulfoxide, heating to 90 ℃, ultrasonically mixing uniformly, adding diamond powder, and mixing uniformly to obtain a diamond particle solution for later use;

(4) preparation of the silica optical fiber: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, and drying by using nitrogen;

firstly, coating azobenzene polymer solution on a quartz substrate to obtain composite quartz, wherein the step of coating the azobenzene polymer comprises the following steps: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, drying the quartz substrate with nitrogen, and protecting the quartz substrate in a sealed container filled with nitrogen; dripping the prepared azobenzene polymer solution on a quartz substrate, and keeping for 20 hours after the prepared azobenzene polymer solution is completely coated to obtain composite quartz;

then coating the composite quartz with a diamond particle solution to obtain the quartz optical fiber, wherein the diamond particle coating comprises the following steps: dripping diamond particle solution on the composite quartz, keeping for 10h after completely coating, cleaning with deionized water, and drying; drying, putting into hot filament chemical vapor deposition equipment, taking acetone as a carbon source, and carrying the acetone into a reaction chamber in a hydrogen bubbling mode, wherein the flow ratio of hydrogen to acetone is 4: 1, the distance between the hot wire and the quartz optical fiber is 8mm, the reaction power is 2000W, the working pressure is 1.8Kpa, the growth time of diamond particles is 20min, and after the growth is finished, the temperature is reduced to room temperature under the condition of not introducing hydrogen, so that the quartz optical fiber is obtained.

Example 2

The preparation method of the quartz optical fiber with excellent light transmission performance comprises the following steps:

(1) preparation of azobenzene polymer: according to the formula, the azobenzene polymer mainly comprises the following components in percentage by mol: 35% of isobutyl methacrylate POSS, 38% of trifluoroethyl methacrylate and 27% of azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate;

dissolving isobutyl methacrylate POSS, trifluoroethyl methacrylate and azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylic acid in tetrahydrofuran simultaneously, and adding an initiator to carry out initiation of free radical polymerization; the initiator is azobisisobutyronitrile, the molar ratio of the initiator to the azobenzene polymer is 40:1, and the tetrahydrofuran needs to be distilled; the free radical polymerization reaction is carried out in a sealed container filled with nitrogen, the reaction temperature of the free radical polymerization reaction is 65 ℃, and the reaction time is 75 hours;

after the free radical polymerization reaction is finished, slowly dripping the solution into a methanol solvent which is subjected to freezing treatment in advance, and generating a precipitate under magnetic stirring; dissolving the precipitate with tetrahydrofuran, repeating the steps for 3-5 times, and drying the obtained precipitate in vacuum to obtain an azobenzene polymer;

(2) preparation of azobenzene polymer solution: dissolving the azobenzene polymer in cyclopentanone to prepare a 30mg/mL azobenzene polymer solution for later use;

(3) preparation of diamond particle solution: according to the formula, the diamond particle solution mainly comprises the following components in parts by weight: 82 parts of dimethyl sulfoxide, 2 parts of diamond powder and 1.5 parts of polyvinyl alcohol; mixing polyvinyl alcohol and dimethyl sulfoxide, heating to 90 ℃, ultrasonically mixing uniformly, adding diamond powder, and mixing uniformly to obtain a diamond particle solution for later use;

(4) preparation of the silica optical fiber: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, and drying by using nitrogen;

firstly, coating azobenzene polymer solution on a quartz substrate to obtain composite quartz, wherein the step of coating the azobenzene polymer comprises the following steps: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, drying the quartz substrate with nitrogen, and protecting the quartz substrate in a sealed container filled with nitrogen; dripping the prepared azobenzene polymer solution on a quartz substrate, and keeping for 22 hours after the azobenzene polymer solution is completely coated to obtain composite quartz;

then coating the composite quartz with a diamond particle solution to obtain the quartz optical fiber, wherein the diamond particle coating comprises the following steps: dripping diamond particle solution on the composite quartz, keeping for 10h after completely coating, cleaning with deionized water, and drying; drying, putting into hot filament chemical vapor deposition equipment, taking acetone as a carbon source, and carrying the acetone into a reaction chamber in a hydrogen bubbling mode, wherein the flow ratio of hydrogen to acetone is 5: 1, the distance between a hot wire and the quartz optical fiber is 10mm, the reaction power is 1800W, the working pressure is 2.0Kpa, the growth time of diamond particles is 15min, and after the growth is finished, the temperature is reduced to room temperature under the condition of not introducing hydrogen to obtain the quartz optical fiber.

Example 3

The preparation method of the quartz optical fiber with excellent light transmission performance comprises the following steps:

(1) preparation of azobenzene polymer: according to the formula, the azobenzene polymer mainly comprises the following components in percentage by mol: isobutyl methacrylate POSS 40%, trifluoroethyl methacrylate 30%, azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate 30%;

dissolving isobutyl methacrylate POSS, trifluoroethyl methacrylate and azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylic acid in tetrahydrofuran simultaneously, and adding an initiator to carry out initiation of free radical polymerization; the initiator is azobisisobutyronitrile, the molar ratio of the initiator to the azobenzene polymer is 100:2.8, and the tetrahydrofuran needs to be distilled; the free radical polymerization reaction is carried out in a sealed container filled with nitrogen, the reaction temperature of the free radical polymerization reaction is 60 ℃, and the reaction time is 72 hours;

after the free radical polymerization reaction is finished, slowly dripping the solution into a methanol solvent which is subjected to freezing treatment in advance, and generating a precipitate under magnetic stirring; dissolving the precipitate with tetrahydrofuran, repeating the steps for 3-5 times, and drying the obtained precipitate in vacuum to obtain an azobenzene polymer;

(2) preparation of azobenzene polymer solution: dissolving the azobenzene polymer in cyclopentanone to prepare an azobenzene polymer solution of 32mg/mL for later use;

(3) preparation of diamond particle solution: according to the formula, the diamond particle solution mainly comprises the following components in parts by weight: 86 parts of dimethyl sulfoxide, 1.8 parts of diamond powder and 1.2 parts of polyvinyl alcohol; mixing polyvinyl alcohol and dimethyl sulfoxide, heating to 90 ℃, ultrasonically mixing uniformly, adding diamond powder, and mixing uniformly to obtain a diamond particle solution for later use;

(4) preparation of the silica optical fiber: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, and drying by using nitrogen;

firstly, coating azobenzene polymer solution on a quartz substrate to obtain composite quartz, wherein the step of coating the azobenzene polymer comprises the following steps: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, drying the quartz substrate with nitrogen, and protecting the quartz substrate in a sealed container filled with nitrogen; dripping the prepared azobenzene polymer solution on a quartz substrate, and keeping for 16 hours after the prepared azobenzene polymer solution is completely coated to obtain composite quartz;

then coating the composite quartz with a diamond particle solution to obtain the quartz optical fiber, wherein the diamond particle coating comprises the following steps: dripping diamond particle solution on the composite quartz, keeping for 10h after completely coating, cleaning with deionized water, and drying; drying, putting into hot filament chemical vapor deposition equipment, taking acetone as a carbon source, and carrying the acetone into a reaction chamber in a hydrogen bubbling mode, wherein the flow ratio of hydrogen to acetone is 100: 30, the distance between the hot wire and the quartz optical fiber is 9mm, the reaction power is 2000W, the working pressure is 2.5Kpa, the growth time of the diamond particles is 20min, and after the growth is finished, the temperature is reduced to room temperature under the condition of not introducing hydrogen to obtain the quartz optical fiber.

Example 4

The preparation method of the quartz optical fiber with excellent light transmission performance comprises the following steps:

(1) preparation of azobenzene polymer: according to the formula, the azobenzene polymer mainly comprises the following components in percentage by mol: isobutyl methacrylate POSS 40%, trifluoroethyl methacrylate 35%, and azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate 25%;

dissolving isobutyl methacrylate POSS, trifluoroethyl methacrylate and azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylic acid in tetrahydrofuran simultaneously, and adding an initiator to carry out initiation of free radical polymerization; the initiator is azobisisobutyronitrile, the molar ratio of the initiator to the azobenzene polymer is 100:2.7, and the tetrahydrofuran needs to be distilled; the free radical polymerization reaction is carried out in a sealed container filled with nitrogen, the reaction temperature of the free radical polymerization reaction is 65 ℃, and the reaction time is 75 hours;

after the free radical polymerization reaction is finished, slowly dripping the solution into a methanol solvent which is subjected to freezing treatment in advance, and generating a precipitate under magnetic stirring; dissolving the precipitate with tetrahydrofuran, repeating the steps for 3-5 times, and drying the obtained precipitate in vacuum to obtain an azobenzene polymer;

(2) preparation of azobenzene polymer solution: dissolving the azobenzene polymer in cyclopentanone to prepare an azobenzene polymer solution of 32mg/mL for later use;

(3) preparation of diamond particle solution: according to the formula, the diamond particle solution mainly comprises the following components in parts by weight: 86 parts of dimethyl sulfoxide, 2 parts of diamond powder and 1.0 part of polyvinyl alcohol; mixing polyvinyl alcohol and dimethyl sulfoxide, heating to 85 ℃, ultrasonically mixing uniformly, adding diamond powder, and mixing uniformly to obtain a diamond particle solution for later use;

(4) preparation of the silica optical fiber: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, and drying by using nitrogen;

firstly, coating azobenzene polymer solution on a quartz substrate to obtain composite quartz, wherein the step of coating the azobenzene polymer comprises the following steps: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, drying the quartz substrate with nitrogen, and protecting the quartz substrate in a sealed container filled with nitrogen; dripping the prepared azobenzene polymer solution on a quartz substrate, and keeping for 24 hours after the azobenzene polymer solution is completely coated to obtain composite quartz;

then coating the composite quartz with a diamond particle solution to obtain the quartz optical fiber, wherein the diamond particle coating comprises the following steps: dripping diamond particle solution on the composite quartz, keeping for 12h after completely coating, cleaning with deionized water, and drying; drying, putting into hot filament chemical vapor deposition equipment, taking acetone as a carbon source, and carrying the acetone into a reaction chamber in a hydrogen bubbling mode, wherein the flow ratio of hydrogen to acetone is 100: 35, the distance between the hot wire and the quartz optical fiber is 9mm, the reaction power is 2200W, the working pressure is 2.5Kpa, the growth time of the diamond particles is 20min, and after the growth is finished, the temperature is reduced to room temperature under the condition of not introducing hydrogen to obtain the quartz optical fiber.

Example 5

The preparation method of the quartz optical fiber with excellent light transmission performance comprises the following steps:

(1) preparation of azobenzene polymer: according to the formula, the azobenzene polymer mainly comprises the following components in percentage by mol: isobutyl methacrylate POSS 38%, trifluoroethyl methacrylate 32%, and azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylate 30%;

dissolving isobutyl methacrylate POSS, trifluoroethyl methacrylate and azobenzene monomer 6- [4- (4-cyanoazophenyl) phenoxy ] ethyl methacrylic acid in tetrahydrofuran simultaneously, and adding an initiator to carry out initiation of free radical polymerization; the initiator is azobisisobutyronitrile, the molar ratio of the initiator to the azobenzene polymer is 100:3, and the tetrahydrofuran needs to be distilled; the free radical polymerization reaction is carried out in a sealed container filled with nitrogen, the reaction temperature of the free radical polymerization reaction is 65 ℃, and the reaction time is 72 hours;

after the free radical polymerization reaction is finished, slowly dripping the solution into a methanol solvent which is subjected to freezing treatment in advance, and generating a precipitate under magnetic stirring; dissolving the precipitate with tetrahydrofuran, repeating the steps for 3-5 times, and drying the obtained precipitate in vacuum to obtain an azobenzene polymer;

(2) preparation of azobenzene polymer solution: dissolving the azobenzene polymer in cyclopentanone to prepare a 30mg/mL azobenzene polymer solution for later use;

(3) preparation of diamond particle solution: according to the formula, the diamond particle solution mainly comprises the following components in parts by weight: 90 parts of dimethyl sulfoxide, 2 parts of diamond powder and 1.2 parts of polyvinyl alcohol; mixing polyvinyl alcohol and dimethyl sulfoxide, heating to 90 ℃, ultrasonically mixing uniformly, adding diamond powder, and mixing uniformly to obtain a diamond particle solution for later use;

(4) preparation of the silica optical fiber: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, and drying by using nitrogen;

firstly, coating azobenzene polymer solution on a quartz substrate to obtain composite quartz, wherein the step of coating the azobenzene polymer comprises the following steps: sequentially flushing the quartz substrate with distilled water, ethanol and distilled water, drying the quartz substrate with nitrogen, and protecting the quartz substrate in a sealed container filled with nitrogen; dripping the prepared azobenzene polymer solution on a quartz substrate, and keeping for 24 hours after the azobenzene polymer solution is completely coated to obtain composite quartz;

then coating the composite quartz with a diamond particle solution to obtain the quartz optical fiber, wherein the diamond particle coating comprises the following steps: dripping diamond particle solution on the composite quartz, keeping for 10h after completely coating, cleaning with deionized water, and drying; drying, putting into hot filament chemical vapor deposition equipment, taking acetone as a carbon source, and carrying the acetone into a reaction chamber in a hydrogen bubbling mode, wherein the flow ratio of hydrogen to acetone is 100: 35, the distance between the hot wire and the quartz optical fiber is 8mm, the reaction power is 1800W, the working pressure is 1.8Kpa, the growth time of the diamond particles is 20min, and after the growth is finished, the temperature is reduced to room temperature under the condition of not introducing hydrogen to obtain the quartz optical fiber.

The quartz optical fibers with excellent optical transmission performance obtained in the above embodiments 1, 2, 3, 4, and 5 have the advantages of easy processing, good toughness, high flexibility, and higher young's modulus and thermo-optic coefficient compared to the untreated quartz substrate, and the optical transmission performance is improved by modulating the transmission light intensity and polarization state of the quartz optical fiber by utilizing the photoisomerization and photoinduced orientation of the azobenzene polymer; by coating the diamond particle solution, the diamond particles have excellent luminescence property, photons can be better generated, and the diamond particles and the quartz optical fiber are effectively compounded, so that the light transmission property is further improved.

The invention has many applications, and the above description is only a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.