阅读说明：本技术 一种防水耐腐蚀的聚丙烯面料及其制备工艺 (Waterproof and corrosion-resistant polypropylene fabric and preparation process thereof ) 是由 翁星星 吕东梅 陈朝晖 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种防水耐腐蚀的聚丙烯面料及其制备工艺。聚丙烯面料包括聚丙烯基层和防水腐蚀层；防水耐腐蚀层主要由防水耐腐蚀涂料喷涂形成。其中,防水耐腐蚀涂料主要由二异氰酸酯、1-(3-二甲氨基丙基)-3-乙基-碳二亚胺盐酸盐、N-十二烷基丙烯酰胺、复合微球、N-羟基琥珀酰亚胺经反应制得。聚丙烯基层为纺丝原液经湿法纺丝制得,纺丝原液主要由复合微球、聚丙烯母粒、聚甲基硅氧烷溶液组成。复合微球是利用甲基丙烯酸甲酯、甲基丙烯酸、聚已内酯在过硫酸钾的催化作用下,通过丙烯酸单体分步聚合、苯并三氮唑溶液溶胀吸附后得到,具有较大的粗糙度,作为涂料喷涂在聚丙烯基层表面,可大幅提高面料的防水、耐腐蚀性能。(The invention discloses a waterproof and corrosion-resistant polypropylene fabric and a preparation process thereof. The polypropylene fabric comprises a polypropylene base layer and a waterproof corrosion layer; the waterproof corrosion-resistant layer is mainly formed by spraying waterproof corrosion-resistant paint. The waterproof and corrosion-resistant coating is mainly prepared by reacting diisocyanate, 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride, N-dodecyl acrylamide, composite microspheres and N-hydroxysuccinimide. The polypropylene base layer is prepared by wet spinning of a spinning solution, and the spinning solution mainly comprises composite microspheres, polypropylene master batches and a polymethylsiloxane solution. The composite microspheres are obtained by polymerization of acrylic monomers in steps and swelling and adsorption of benzotriazole solution under the catalytic action of potassium persulfate, have high roughness, and can be sprayed on the surface of a polypropylene-based layer as a coating to greatly improve the waterproof and corrosion-resistant properties of the fabric.)

1. A waterproof and corrosion-resistant polypropylene fabric is characterized in that; the polypropylene fabric comprises a polypropylene base layer and a waterproof corrosion layer; the waterproof corrosion-resistant layer is mainly formed by spraying waterproof corrosion-resistant paint.

2. The waterproof and corrosion-resistant polypropylene fabric according to claim 1, wherein: the waterproof corrosion-resistant coating is mainly prepared by reacting diisocyanate, 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride, N-dodecyl acrylamide, composite microspheres and N-hydroxysuccinimide.

3. The waterproof and corrosion-resistant polypropylene fabric according to claim 1, wherein: the polypropylene base layer is prepared from spinning stock solution through wet spinning, and the spinning stock solution mainly comprises composite microspheres, polypropylene master batches and polymethylsiloxane solution.

4. The waterproof and corrosion-resistant polypropylene fabric according to claim 2, wherein: the composite microsphere is mainly prepared from the following raw materials, by weight, 12-15 parts of methyl methacrylate, 12-15 parts of benzotriazole, 6-9 parts of methacrylic acid, 11-15 parts of styrene monomer, 25-29 parts of polycaprolactone, 4-7 parts of sodium dodecyl sulfate and 4-7 parts of potassium persulfate.

5. A preparation process of a waterproof and corrosion-resistant polypropylene fabric is characterized by comprising the following steps: comprises the following steps;

(1) preparing composite microspheres;

(2) preparing a waterproof corrosion-resistant coating:

(3) preparing a spinning solution;

(4) and preparing a finished product of the waterproof and corrosion-resistant polypropylene fabric.

6. The preparation process of the waterproof and corrosion-resistant polypropylene fabric according to claim 5, wherein the preparation process comprises the following steps: comprises the following steps;

(1) preparing composite microspheres;

uniformly mixing potassium persulfate and sodium dodecyl sulfate, adding deionized water, stirring to prepare an aqueous solution, and raising the temperature to 80-90 ℃; uniformly stirring quantitative polycaprolactone and methyl methacrylate, replacing with nitrogen for 3 times, dropwise adding 3/4 amounts of methacrylic acid monomer, reacting, keeping the temperature at 85-95 ℃, and continuing aging to obtain a mixed solution A; cooling the mixed solution A to 30-40 ℃, vacuumizing, dropwise adding the residual 1/4 parts of methacrylic acid monomer, polycaprolactone and methyl methacrylate, and heating to 80-90 ℃ for reaction to obtain a mixed solution B;

adding the mixed solution B into a benzotriazole solution with the mass concentration of 1-3 wt.%, keeping the temperature at 80-90 ℃, and performing ultrasonic treatment to obtain a mixed solution C;

adding a potassium persulfate aqueous solution into the mixed solution, keeping the temperature at 80-90 ℃ under the nitrogen atmosphere, dropwise adding 2/3 styrene monomers for reaction, cooling, continuously dropwise adding the rest 1/3 styrene monomers, after dropwise adding, preserving heat, aging, centrifugally separating, washing with deionized water, and drying to obtain composite microspheres;

(2) preparing a waterproof corrosion-resistant coating: dissolving dialdehyde cellulose in deionized water, adding 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride and N-hydroxysuccinimide, and adding N-dodecyl acrylamide solution; reacting at 70-75 deg.C; filtering, washing, dispersing in tetrahydrofuran by ultrasonic, adding the composite microspheres prepared in the step (1) and diisocyanate, reacting at the temperature of 60-70 ℃, cooling to room temperature, and washing to obtain the waterproof and corrosion-resistant coating;

(3) preparing a spinning solution; melting the polypropylene master batch by a double-screw extruder to obtain a polypropylene melt, adding the composite microspheres prepared in the step (1) and a polymethylsiloxane solution, and uniformly mixing to obtain a spinning solution;

placing the spinning solution in ultrasonic waves for oscillation and defoaming, extruding the defoamed spinning solution through a wet spinning special spinning nozzle to obtain fiber suspension, and forming, dehydrating and laminating to form a fiber net; sequentially pre-needling, spunlacing, vacuum suction, drying and cutting the fiber web to obtain a polypropylene base layer;

(4) preparing a finished product of the waterproof and corrosion-resistant polypropylene fabric: and (3) spraying the waterproof corrosion-resistant coating prepared in the step (2) on the surface of the polypropylene base layer prepared in the step (3), and drying to obtain a waterproof corrosion-resistant polypropylene fabric finished product.

7. The preparation process of the waterproof and corrosion-resistant polypropylene fabric according to claim 6, wherein the preparation process comprises the following steps: comprises the following steps;

(1) preparing composite microspheres;

uniformly mixing potassium persulfate and sodium dodecyl sulfate, adding 300ml of deionized water, stirring to prepare an aqueous solution, and raising the temperature to 80-90 ℃; uniformly stirring quantitative polycaprolactone and methyl methacrylate, replacing with nitrogen for 3 times until the oxygen content is less than or equal to 10ppm, dropwise adding 3/4 amounts of methacrylic acid monomer, reacting for 6-7h, keeping the pressure at 0.2-0.4mpa and the temperature at 85-95 ℃, and continuously aging for 2-3h to obtain a mixed solution A; cooling the mixed solution A to 30-40 ℃, vacuumizing for 10-20min, wherein the vacuum degree is less than or equal to 0.095mpa, dropwise adding the residual 1/4 mass parts of methacrylic acid monomer, polycaprolactone and methyl methacrylate, heating to 80-90 ℃, keeping mechanical stirring, and reacting for 4-5h to obtain a mixed solution B;

adding the mixed solution B into a benzotriazole solution with the mass concentration of 1-3 wt.%, keeping the temperature at 80-90 ℃, and carrying out ultrasonic treatment for 2-3h to obtain a mixed solution C;

adding a potassium persulfate aqueous solution into the mixed solution, keeping the temperature at 80-90 ℃ under the nitrogen atmosphere, dropwise adding 2/3 styrene monomers, reacting for 4-6h, cooling to 40-50 ℃, adding a sodium hydroxide aqueous solution, adjusting the pH to 9.5-10.5, continuously dropwise adding the rest 1/3 styrene monomers, keeping the temperature at 85-95 ℃ after dropwise adding, aging for 2-3h, centrifugally separating, washing with deionized water, and drying to obtain composite microspheres;

(2) preparing a waterproof corrosion-resistant coating: dissolving dialdehyde cellulose in deionized water, adding 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride and N-hydroxysuccinimide, adjusting the pH to 5.0-5.5, and adding N-dodecyl acrylamide solution; adding sodium hydroxide solution, adjusting pH to 7.3-7.8, and reacting at 70-75 deg.C for 8-10 h; filtering, washing, dispersing in tetrahydrofuran by ultrasonic, adding the composite microspheres prepared in the step (1) and diisocyanate, reacting for 10-12h at the temperature of 60-70 ℃, cooling to room temperature, and washing to obtain the waterproof and corrosion-resistant coating;

(3) preparing a spinning solution; melting the polypropylene master batch by a double-screw extruder to obtain a polypropylene melt, adding the composite microspheres prepared in the step (1) and a polymethylsiloxane solution, and uniformly mixing to obtain a spinning solution;

placing the spinning solution in ultrasonic waves for oscillation for 3-4h, removing bubbles in the spinning solution, extruding the defoamed spinning solution through a spinning nozzle special for wet spinning, wherein the specification of the spinning plate is 0.3mm multiplied by 500 holes, the length-diameter ratio of the spinning holes is 2: 1, and the spinning speed is 8-12 m/min; dispersing uniformly in water bath at 50-60 deg.C to obtain fiber suspension, forming, dewatering, and laminating to obtain fiber web; sequentially pre-needling, spunlacing, vacuum suction, drying and cutting the fiber web to obtain a polypropylene base layer;

(4) preparing a finished product of the waterproof and corrosion-resistant polypropylene fabric: and (3) spraying the waterproof corrosion-resistant coating prepared in the step (2) on the surface of the polypropylene base layer prepared in the step (3), and drying to obtain a waterproof corrosion-resistant polypropylene fabric finished product.

Technical Field

The invention relates to the technical field of fabric processing, in particular to a waterproof and corrosion-resistant polypropylene fabric and a preparation process thereof.

Background

In daily life, various different types of fabrics and a plurality of textiles prepared by the fabrics can be seen everywhere; however, with the diversification of society, the requirements for the functionality of the fabric in various industries are more diversified. In the textile dyeing and finishing process and special industry posts, the textile fabric can contact chemical components such as water, acid, salt and the like for a long time, and the conventional textile fabric is easily curled, cracked and damaged after being corroded by chemicals such as acid, salt and the like, so that the use experience of the fabric is greatly reduced, the service life of the fabric is prolonged, and body injury can be caused under severe conditions; therefore, a product fabric with waterproof and corrosion resistance needs to be prepared to meet the use requirements of special industries.

Disclosure of Invention

The invention aims to provide a waterproof and corrosion-resistant polypropylene fabric and a preparation process thereof, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the waterproof and corrosion-resistant polypropylene fabric comprises a polypropylene base layer and a waterproof corrosion-resistant layer; the waterproof corrosion-resistant layer is mainly formed by spraying waterproof corrosion-resistant paint.

Furthermore, the waterproof and corrosion-resistant coating is mainly prepared by reacting diisocyanate, 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride, N-dodecyl acrylamide, composite microspheres and N-hydroxysuccinimide.

Further, the polypropylene base layer is prepared by spinning a spinning solution by a wet method, and the spinning solution mainly comprises composite microspheres, polypropylene master batches and a polymethylsiloxane solution.

Further, the composite microsphere is mainly prepared from the following raw materials, by weight, 12-15 parts of methyl methacrylate, 12-15 parts of benzotriazole, 6-9 parts of methacrylic acid, 11-15 parts of styrene monomer, 25-29 parts of polycaprolactone, 4-7 parts of sodium dodecyl sulfate and 4-7 parts of potassium persulfate.

A preparation process of a waterproof and corrosion-resistant polypropylene fabric comprises the following steps;

(1) preparing composite microspheres;

(2) preparing a waterproof corrosion-resistant coating:

(3) preparing a spinning solution;

(4) and preparing a finished product of the waterproof and corrosion-resistant polypropylene fabric.

Further, the preparation process of the waterproof and corrosion-resistant polypropylene fabric comprises the following steps;

(1) preparing composite microspheres;

uniformly mixing potassium persulfate and sodium dodecyl sulfate, adding deionized water, stirring to prepare an aqueous solution, and raising the temperature to 80-90 ℃; uniformly stirring quantitative polycaprolactone and methyl methacrylate, replacing with nitrogen for 3 times, dropwise adding 3/4 amounts of methacrylic acid monomer, reacting, keeping the temperature at 85-95 ℃, and continuing aging to obtain a mixed solution A; cooling the mixed solution A to 30-40 ℃, vacuumizing, dropwise adding the residual 1/4 parts of methacrylic acid monomer, polycaprolactone and methyl methacrylate, and heating to 80-90 ℃ for reaction to obtain a mixed solution B;

adding the mixed solution B into a benzotriazole solution with the mass concentration of 1-3 wt.%, keeping the temperature at 80-90 ℃, and performing ultrasonic treatment to obtain a mixed solution C;

adding a potassium persulfate aqueous solution into the mixed solution, keeping the temperature at 80-90 ℃ under the nitrogen atmosphere, dropwise adding 2/3 styrene monomers for reaction, cooling, continuously dropwise adding the rest 1/3 styrene monomers, after dropwise adding, preserving heat, aging, centrifugally separating, washing with deionized water, and drying to obtain composite microspheres;

(2) preparing a waterproof corrosion-resistant coating: dissolving dialdehyde cellulose in deionized water, adding 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride and N-hydroxysuccinimide, and adding N-dodecyl acrylamide solution; reacting at 70-75 deg.C; filtering, washing, dispersing in tetrahydrofuran by ultrasonic, adding the composite microspheres prepared in the step (1) and diisocyanate, reacting at the temperature of 60-70 ℃, cooling to room temperature, and washing to obtain the waterproof and corrosion-resistant coating;

(3) preparing a spinning solution; melting the polypropylene master batch by a double-screw extruder to obtain a polypropylene melt, adding the composite microspheres prepared in the step (1) and a polymethylsiloxane solution, and uniformly mixing to obtain a spinning solution;

placing the spinning solution in ultrasonic waves for oscillation and defoaming, extruding the defoamed spinning solution through a wet spinning special spinning nozzle to obtain fiber suspension, and forming, dehydrating and laminating to form a fiber net; sequentially pre-needling, spunlacing, vacuum suction, drying and cutting the fiber web to obtain a polypropylene base layer;

(4) preparing a finished product of the waterproof and corrosion-resistant polypropylene fabric: and (3) spraying the waterproof corrosion-resistant coating prepared in the step (2) on the surface of the polypropylene base layer prepared in the step (3), and drying to obtain a waterproof corrosion-resistant polypropylene fabric finished product.

Further, the preparation process of the waterproof and corrosion-resistant polypropylene fabric comprises the following steps;

(1) preparing composite microspheres;

uniformly mixing potassium persulfate and sodium dodecyl sulfate, adding 300ml of deionized water, stirring to prepare an aqueous solution, and raising the temperature to 80-90 ℃; uniformly stirring quantitative polycaprolactone and methyl methacrylate, replacing with nitrogen for 3 times until the oxygen content is less than or equal to 10ppm, dropwise adding 3/4 amounts of methacrylic acid monomer, reacting for 6-7h, keeping the pressure at 0.2-0.4mpa and the temperature at 85-95 ℃, and continuously aging for 2-3h to obtain a mixed solution A; cooling the mixed solution A to 30-40 ℃, vacuumizing for 10-20min, wherein the vacuum degree is less than or equal to 0.095mpa, dropwise adding the residual 1/4 mass parts of methacrylic acid monomer, polycaprolactone and methyl methacrylate, heating to 80-90 ℃, keeping mechanical stirring, and reacting for 4-5h to obtain a mixed solution B;

adding the mixed solution B into a benzotriazole solution with the mass concentration of 1-3 wt.%, keeping the temperature at 80-90 ℃, and carrying out ultrasonic treatment for 2-3h to obtain a mixed solution C;

adding a potassium persulfate aqueous solution into the mixed solution, keeping the temperature at 80-90 ℃ under the nitrogen atmosphere, dropwise adding 2/3 styrene monomers, reacting for 4-6h, cooling to 40-50 ℃, adding a sodium hydroxide aqueous solution, adjusting the pH to 9.5-10.5, continuously dropwise adding the rest 1/3 styrene monomers, keeping the temperature at 85-95 ℃ after dropwise adding, aging for 2-3h, centrifugally separating, washing with deionized water, and drying to obtain composite microspheres;

(2) preparing a waterproof corrosion-resistant coating: dissolving dialdehyde cellulose in deionized water, adding 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride and N-hydroxysuccinimide, adjusting the pH to 5.0-5.5, and adding N-dodecyl acrylamide solution; adding sodium hydroxide solution, adjusting pH to 7.3-7.8, and reacting at 70-75 deg.C for 8-10 h; filtering, washing, dispersing in tetrahydrofuran by ultrasonic, adding the composite microspheres prepared in the step (1) and diisocyanate, reacting for 10-12h at the temperature of 60-70 ℃, cooling to room temperature, and washing to obtain the waterproof and corrosion-resistant coating;

(3) preparing a spinning solution; melting the polypropylene master batch by a double-screw extruder to obtain a polypropylene melt, adding the composite microspheres prepared in the step (1) and a polymethylsiloxane solution, and uniformly mixing to obtain a spinning solution; placing the spinning solution in ultrasonic waves for oscillation for 3-4h, removing bubbles in the spinning solution, extruding the defoamed spinning solution through a spinning nozzle special for wet spinning, wherein the specification of the spinning plate is 0.3mm multiplied by 500 holes, the length-diameter ratio of the spinning holes is 2: 1, and the spinning speed is 8-12 m/min; dispersing uniformly in water bath at 50-60 deg.C to obtain fiber suspension, forming, dewatering, and laminating to obtain fiber web; sequentially pre-needling, spunlacing, vacuum suction, drying and cutting the fiber web to obtain a polypropylene base layer;

(4) preparing a finished product of the waterproof and corrosion-resistant polypropylene fabric: and (3) spraying the waterproof corrosion-resistant coating prepared in the step (2) on the surface of the polypropylene base layer prepared in the step (3), and drying to obtain a waterproof corrosion-resistant polypropylene fabric finished product.

Compared with the prior art, the invention has the following beneficial effects: the invention prepares the polypropylene fabric with good waterproof and corrosion resistance, and the waterproof and corrosion resistance of the fabric is improved mainly by spraying the waterproof and corrosion-resistant coating on the surface of the polypropylene layer. Firstly, methyl methacrylate, methacrylic acid and polycaprolactone are subjected to fractional polymerization of acrylic monomers and swelling adsorption of benzotriazole solution under the catalytic action of potassium persulfate to obtain microspheres with rough surfaces and densely distributed small bulges, wherein the microspheres have large surface areas and enhanced hydrophobicity; the microspheres are coated with polycaprolactone and benzotriazole to effectively adsorb Na⁺、Mg²⁺Generation of metal cationsForming a stable complex, thereby endowing the composite microsphere with certain corrosion resistance; the single use of benzotriazole has poor dispersibility and compatibility in the microsphere cavity, and the defect can be improved by adding polycaprolactone. And continuously introducing styrene monomer, successfully grafting polystyrene on the surface of the core-shell type microsphere, wherein the polystyrene outer layer has good waterproof performance, salt resistance and acid resistance, so that the prepared composite microsphere has excellent waterproof and corrosion resistance. According to the scheme, the coating with the composite microspheres is sprayed on the surface of the polypropylene, and the composite microspheres in a certain proportion are added during preparation of the polypropylene base layer, so that the polypropylene fabric has a stronger water-resistant and corrosion-resistant function from inside to outside.

In addition, in the process of preparing the waterproof and corrosion-resistant coating, N-dodecyl acrylamide, 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride and carboxyl in dialdehyde cellulose molecules can react to realize amidation of the dialdehyde cellulose, alkyl long-chain structures are grafted on the amidated cellulose molecules, and then isocyanic acid radicals are grafted; therefore, the dialdehyde cellulose is endowed with the characteristics of alkyl long chain and isocyanate group, the existence of the alkyl long chain and the isocyanate group can greatly improve the binding power and the waterproof performance of the coating and the polypropylene base layer, simultaneously improve the dispersibility and the compatibility of the composite microsphere in the coating, and exert the corrosion resistance of the composite microsphere to the maximum extent.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.

Example 1

A preparation process of a waterproof and corrosion-resistant polypropylene fabric comprises the following steps;

(1) preparing composite microspheres;

uniformly mixing potassium persulfate and sodium dodecyl sulfate, adding 300ml of deionized water, stirring to prepare an aqueous solution, and raising the temperature to 80 ℃; uniformly stirring quantitative polycaprolactone and methyl methacrylate, replacing with nitrogen for 3 times until the oxygen content is less than or equal to 10ppm, dropwise adding 3/4 amounts of methacrylic acid monomer, reacting for 6h, keeping the pressure at 0.2mpa and the temperature at 85 ℃, and continuing aging for 2h to obtain a mixed solution A; cooling the mixed solution A to 30 ℃, vacuumizing for 10min, wherein the vacuum degree is less than or equal to 0.095mpa, dropwise adding the residual 1/4 mass parts of methacrylic acid monomer, polycaprolactone and methyl methacrylate, heating to 80 ℃, keeping mechanical stirring, and reacting for 4h to obtain a mixed solution B;

adding the mixed solution B into a benzotriazole solution with the mass concentration of 1 wt.%, keeping the temperature at 80 ℃, and carrying out ultrasonic treatment for 2h to obtain a mixed solution C;

adding a potassium persulfate aqueous solution into the mixed solution, keeping the temperature at 80 ℃ under the nitrogen atmosphere, dropwise adding 2/3 styrene monomers, reacting for 4 hours, cooling to 40 ℃, adding a sodium hydroxide aqueous solution, adjusting the pH to 9.5, continuously dropwise adding the rest 1/3 styrene monomers, keeping the temperature at 85 ℃ after dropwise adding, aging for 2 hours, carrying out centrifugal separation, washing with deionized water, and drying to obtain composite microspheres;

(2) preparing a waterproof corrosion-resistant coating: dissolving dialdehyde cellulose in deionized water, adding 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride and N-hydroxysuccinimide, adjusting the pH to 5.0, and adding N-dodecyl acrylamide solution; adding sodium hydroxide solution, adjusting the pH value to 7.3, and reacting for 8 hours at the temperature of 70 ℃; filtering, washing, ultrasonically dispersing in tetrahydrofuran, adding the composite microspheres prepared in the step (1) and diisocyanate, reacting for 10 hours at the temperature of 60 ℃, cooling to room temperature, and washing to obtain the waterproof corrosion-resistant coating;

(3) preparing a spinning solution; melting the polypropylene master batch by a double-screw extruder to obtain a polypropylene melt, adding the composite microspheres prepared in the step (1) and a polymethylsiloxane solution, and uniformly mixing to obtain a spinning solution;

placing the spinning solution in ultrasonic waves for oscillation for 3 hours, removing bubbles in the spinning solution, extruding the defoamed spinning solution through a spinning nozzle special for wet spinning, wherein the specification of a spinneret plate is 0.3mm multiplied by 500 holes, the length-diameter ratio of the spinning holes is 2: 1, and the spinning speed is 8 m/min; dispersing uniformly in water bath at 50 deg.C to obtain fiber suspension, forming, dewatering, and laminating to obtain fiber web; sequentially pre-needling, spunlacing, vacuum suction, drying and cutting the fiber web to obtain a polypropylene base layer;

(4) preparing a finished product of the waterproof and corrosion-resistant polypropylene fabric: and (3) spraying the waterproof corrosion-resistant coating prepared in the step (2) on the surface of the polypropylene base layer prepared in the step (3), and drying to obtain a waterproof corrosion-resistant polypropylene fabric finished product.

The composite microsphere in the embodiment comprises the following raw materials, by weight, 12 parts of methyl methacrylate, 12 parts of benzotriazole, 11 parts of styrene monomer, 6 parts of methacrylic acid, 25 parts of polycaprolactone, 4 parts of sodium dodecyl sulfate and 4 parts of potassium persulfate.

Example 2

A preparation process of a waterproof and corrosion-resistant polypropylene fabric comprises the following steps;

(1) preparing composite microspheres;

uniformly mixing potassium persulfate and sodium dodecyl sulfate, adding 300ml of deionized water, stirring to prepare an aqueous solution, and raising the temperature to 84 ℃; uniformly stirring quantitative polycaprolactone and methyl methacrylate, replacing with nitrogen for 3 times until the oxygen content is less than or equal to 10ppm, dropwise adding 3/4 amounts of methacrylic acid monomer, reacting for 6.5h, keeping the pressure at 0.3mpa and the temperature at 87 ℃, and continuing aging for 2.5h to obtain a mixed solution A; cooling the mixed solution A to 36 ℃, vacuumizing for 15min, wherein the vacuum degree is less than or equal to 0.095mpa, dropwise adding the residual 1/4 mass parts of methacrylic acid monomer, polycaprolactone and methyl methacrylate, heating to 85 ℃, keeping mechanical stirring, and reacting for 4.5h to obtain a mixed solution B;

adding the mixed solution B into a benzotriazole solution with the mass concentration of 2 wt.%, maintaining the temperature at 87 ℃, and carrying out ultrasonic treatment for 2.5h to obtain a mixed solution C;

adding a potassium persulfate aqueous solution into the mixed solution, keeping the temperature at 83 ℃ under the nitrogen atmosphere, dropwise adding 2/3 styrene monomers, reacting for 5 hours, cooling to 44 ℃, adding a sodium hydroxide aqueous solution, adjusting the pH to 10.0, continuously dropwise adding the rest 1/3 styrene monomers, keeping the temperature at 90 ℃ after dropwise adding, aging for 2.5 hours, carrying out centrifugal separation, washing with deionized water, and drying to obtain composite microspheres;

(2) preparing a waterproof corrosion-resistant coating: dissolving dialdehyde cellulose in deionized water, adding 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride and N-hydroxysuccinimide, adjusting the pH to 5.3, and adding an N-dodecyl acrylamide solution; adding sodium hydroxide solution, adjusting the pH value to 7.5, and reacting for 9 hours at the temperature of 72 ℃; filtering, washing, ultrasonically dispersing in tetrahydrofuran, adding the composite microspheres prepared in the step (1) and diisocyanate, reacting for 11 hours at the temperature of 65 ℃, cooling to room temperature, and washing to obtain the waterproof corrosion-resistant coating;

(3) preparing a spinning solution; melting the polypropylene master batch by a double-screw extruder to obtain a polypropylene melt, adding the composite microspheres prepared in the step (1) and a polymethylsiloxane solution, and uniformly mixing to obtain a spinning solution;

placing the spinning solution in ultrasonic waves for oscillation for 3.5h, removing bubbles in the spinning solution, extruding the defoamed spinning solution through a spinning nozzle special for wet spinning, wherein the specification of the spinning nozzle is 0.3mm multiplied by 500 holes, the length-diameter ratio of the spinning holes is 2: 1, and the spinning speed is 10 m/min; dispersing uniformly in 56 deg.C water bath to obtain fiber suspension, forming, dewatering, and laminating to obtain fiber web; sequentially pre-needling, spunlacing, vacuum suction, drying and cutting the fiber web to obtain a polypropylene base layer;

(4) preparing a finished product of the waterproof and corrosion-resistant polypropylene fabric: and (3) spraying the waterproof corrosion-resistant coating prepared in the step (2) on the surface of the polypropylene base layer prepared in the step (3), and drying to obtain a waterproof corrosion-resistant polypropylene fabric finished product.

The composite microsphere in the embodiment comprises the following raw materials, by weight, 13 parts of methyl methacrylate, 13 parts of benzotriazole, 7 parts of methacrylic acid, 12 parts of styrene monomer, 27 parts of polycaprolactone, 5 parts of sodium dodecyl sulfate and 5 parts of potassium persulfate.

Example 3

A preparation process of a waterproof and corrosion-resistant polypropylene fabric comprises the following steps;

(1) preparing composite microspheres;

uniformly mixing potassium persulfate and sodium dodecyl sulfate, adding 300ml of deionized water, stirring to prepare an aqueous solution, and raising the temperature to 90 ℃; uniformly stirring quantitative polycaprolactone and methyl methacrylate, replacing with nitrogen for 3 times until the oxygen content is less than or equal to 10ppm, dropwise adding 3/4 amounts of methacrylic acid monomer, reacting for 7h, keeping the pressure at 0.4mpa and the temperature at 95 ℃, and continuously aging for 3h to obtain a mixed solution A; cooling the mixed solution A to 40 ℃, vacuumizing for 20min, wherein the vacuum degree is less than or equal to 0.095mpa, dropwise adding the residual 1/4 mass parts of methacrylic acid monomer, polycaprolactone and methyl methacrylate, heating to 90 ℃, keeping mechanical stirring, and reacting for 5h to obtain a mixed solution B;

adding the mixed solution B into a benzotriazole solution with the mass concentration of 3 wt.%, maintaining the temperature at 90 ℃, and performing ultrasonic treatment for 3h to obtain a mixed solution C;

adding a potassium persulfate aqueous solution into the mixed solution, maintaining the temperature at 90 ℃ under the nitrogen atmosphere, dropwise adding 2/3 styrene monomers, reacting for 6 hours, cooling to 50 ℃, adding a sodium hydroxide aqueous solution, adjusting the pH to 10.5, continuously dropwise adding the rest 1/3 styrene monomers, maintaining the temperature at 95 ℃ after dropwise adding, aging for 3 hours, performing centrifugal separation, washing with deionized water, and drying to obtain composite microspheres;

(2) preparing a waterproof corrosion-resistant coating: dissolving dialdehyde cellulose in deionized water, adding 1- (3-dimethylaminopropyl) -3-ethyl-carbodiimide hydrochloride and N-hydroxysuccinimide, adjusting the pH to 5.5, and adding N-dodecyl acrylamide solution; adding sodium hydroxide solution, adjusting the pH value to 7.8, and reacting for 10 hours at the temperature of 75 ℃; filtering, washing, ultrasonically dispersing in tetrahydrofuran, adding the composite microspheres prepared in the step (1) and diisocyanate, reacting for 12 hours at the temperature of 70 ℃, cooling to room temperature, and washing to obtain the waterproof and corrosion-resistant coating;

(3) preparing a spinning solution; melting the polypropylene master batch by a double-screw extruder to obtain a polypropylene melt, adding the composite microspheres prepared in the step (1) and a polymethylsiloxane solution, and uniformly mixing to obtain a spinning solution;

placing the spinning solution in ultrasonic waves for oscillation for 4 hours, removing bubbles in the spinning solution, extruding the defoamed spinning solution through a spinning nozzle special for wet spinning, wherein the specification of a spinneret plate is 0.3mm multiplied by 500 holes, the length-diameter ratio of the spinning holes is 2: 1, and the spinning speed is 12 m/min; dispersing uniformly in water bath at 60 deg.C to obtain fiber suspension, forming, dehydrating, and laminating to obtain fiber web; sequentially pre-needling, spunlacing, vacuum suction, drying and cutting the fiber web to obtain a polypropylene base layer;

(4) preparing a finished product of the waterproof and corrosion-resistant polypropylene fabric: and (3) spraying the waterproof corrosion-resistant coating prepared in the step (2) on the surface of the polypropylene base layer prepared in the step (3), and drying to obtain a waterproof corrosion-resistant polypropylene fabric finished product. The composite microsphere in the embodiment comprises the following raw materials, by weight, 15 parts of methyl methacrylate, 15 parts of benzotriazole, 9 parts of methacrylic acid, 15 parts of styrene monomer, 29 parts of polycaprolactone, 7 parts of sodium dodecyl sulfate and 7 parts of potassium persulfate.

Comparative example 1

Compared with the embodiment 2, the composite microsphere is prepared without polycaprolactone; the rest is the same as in example 2.

Comparative example 2

Compared with the example 2, the polypropylene base layer is not sprayed with the waterproof and corrosion-resistant coating, and the rest is the same as the example 2.

Comparative example 3

Compared with the example 2, the composite microspheres are not added when the spinning solution is prepared, and the rest contents are the same as the example 2.

Examples of effects

In order to verify the technical effect of the scheme, the waterproof and corrosion-resistant polypropylene fabrics prepared in the embodiments 1 to 3 and the comparative examples 1 to 3 are subjected to the following experiments:

1. dripping water drops on the surfaces of the polypropylene fabrics, and measuring the water contact angle of the polypropylene fabrics by using a contact angle meter to obtain hydrophobicity; detecting the hydrostatic pressure of the fabric by referring to a GB/T4744-2013 standard test method; the waterproof performance of the polyethylene fabric is judged.

2. Placing each group of polypropylene in a salt spray box, and spraying a NaCl solution on the surface of the polypropylene fabric at the temperature of 35 ℃ for 2 hours; the glass is placed in a constant temperature and humidity box with the temperature of 40 ℃ and the humidity of 80 percent, and the corrosion resistance of the surface is observed (the time of resisting the smoke is taken as a judgment basis). Specific experimental data are shown in table 1 below:

	contact angle °	Hydrostatic pressure/mbar	Salt spray time/h
				Example 1	141	52	240
Example 2	143	54	242
				Example 3	143	55	245
Comparative example 1	142	52	201
				Comparative example 2	116	41	179
Comparative example 3	140	45	201

TABLE 1

As can be seen from the data in the table, the fabric prepared in comparative example 1 without polycaprolactone has a decreased smoke time and speed compared with those in example 2, so that the fabric prepared in the comparative example also has better effect of combining polycaprolactone and benzotriazole and has stronger waterproof and corrosion-resistant properties.

Comparative example 2 compared with example 2, the polypropylene-based layer which is not sprayed with the waterproof and corrosion-resistant coating can produce a fabric contact angle of only 116 degrees, which is 27 degrees smaller than that of comparative document 2, and the hydrostatic pressure and the smoke time are both smaller than that of comparative document 2, so that the waterproof and corrosion-resistant coating prepared by the scheme is also demonstrated to have excellent waterproof and corrosion-resistant performances.

Compared with the example 2, the comparative example 3 also shows that the composite microspheres are optimally applied to the surface and the interior of the polypropylene fabric simultaneously, and the obtained polypropylene fabric has better water resistance and corrosion resistance.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.