阅读说明：本技术 一种具有较强韧性的木质部纤维及其制备方法 (Xylem fiber with high toughness and preparation method thereof ) 是由 谭旭鑫 于 2021-01-19 设计创作，主要内容包括：本发明公开了一种具有较强韧性的木质部纤维及其制备方法,包括改性木纤维、甘油、去离子水。小分子胶原蛋白聚合填满木纤维纹孔,使得木纤维的分子结构发生改变,有效减弱木纤维分子间的作用力,初步软化木纤维,增强木质素的韧性。胶原分子具有极强的吸湿性,胶原吸水后体积膨胀,可以将木纤维的分子结构撑开,进一步软化木纤维,增强木纤维的韧性；蛋白质的活化使得羧甲基壳聚糖间发生氨基聚合,与胶原蛋白和羧甲基壳聚糖生成的π键结合,生成二维分子链穿插在木纤维分子结构内部,构成了更加柔韧的双层交叉网状链,改善了木纤维的拉伸强度和断裂伸长率。甘油可以削弱木纤维分子相互作用力,再次增加了木纤维的韧性。(The invention discloses a xylem fiber with strong toughness and a preparation method thereof. The micromolecular collagen is polymerized to fill wood fiber pores, so that the molecular structure of wood fiber is changed, the acting force among wood fiber molecules is effectively weakened, the wood fiber is preliminarily softened, and the toughness of lignin is enhanced. Collagen molecules have extremely strong hygroscopicity, and the collagen expands in volume after absorbing water, so that the molecular structure of wood fibers can be expanded, the wood fibers are further softened, and the toughness of the wood fibers is enhanced; the activation of protein enables amino polymerization to occur between carboxymethyl chitosan, and the amino polymerization is combined with pi bonds generated by collagen and carboxymethyl chitosan to generate two-dimensional molecular chains to be inserted into the molecular structure of wood fiber, so that a more flexible double-layer cross reticular chain is formed, and the tensile strength and the elongation at break of the wood fiber are improved. The glycerin can weaken the interaction force of wood fiber molecules and increase the toughness of the wood fiber again.)

1. The xylem fiber with stronger toughness comprises the following raw materials in parts by weight: 50-70 parts of modified wood fiber, 10-15 parts of glycerol and a plurality of deionized water.

2. Stronger tough wood fibre according to claim 1, characterised in that: the modified wood fiber is prepared by dissolving wood fiber in ionic liquid and then sequentially carrying out pretreatment operation and pre-modification operation.

3. Stronger tough wood fibre according to claim 2, characterised in that: the pretreatment operation is to carry out solidification after centrifuging the wood fiber solution, and then the surface is dried to prepare the wood fiber membrane.

4. Stronger tough wood fibre according to claim 3, characterized in that: the pre-modification operation is to carry out micromolecular collagen bombardment on the wood fiber membrane, and polymerize macromolecular collagen in the grain holes of the wood fibers to fill the grain holes of the wood fibers.

5. Stronger tough wood fibre according to claim 4, characterized in that: the ionic liquid is a 95% chlorinated 1-butyl-3-methylimidazole solution.

6. The preparation method of the xylem fiber with stronger toughness is characterized by comprising the following specific steps of:

(1) preparation of pretreated wood fiber: centrifuging the wood fiber solution, solidifying, and drying the surface to obtain pretreated wood fiber;

(2) preparing pre-modified wood fiber: bombarding the pretreated wood fiber obtained in the step (1) with micromolecular collagen to obtain a pre-modified wood fiber;

(3) preparing modified wood fiber: crosslinking collagen and carboxymethyl chitosan to prepare modified wood fibers in the pre-modified wood fiber structure obtained in the step (2);

(4) preparing the xylem fiber with stronger toughness: and (4) soaking the modified wood fiber obtained in the step (3) by using tetrahydrofuran, centrifuging, and spraying glycerol to obtain the xylem fiber with strong toughness.

7. The method for preparing the wood fiber with stronger toughness according to claim 6, wherein the method for preparing the pretreated wood fiber in the step (1) comprises the following steps: mixing the wood fiber with sugar and lipid removed with ionic liquid, vacuum homogenizing, dissolving the wood fiber in the ionic liquid under the action of shearing force, centrifuging the mixed solution at the normal temperature of 6000rpm for 10min to remove impurities and bubbles to obtain a wood fiber solution, adding the centrifuged supernatant into a polyvinyl chloride-coated mold, horizontally standing for 5h, soaking the film liquid in deionized water for 24h after solidification and forming, coating glycerol on the surface, and vacuum drying to obtain the pretreated wood fiber.

8. The method for preparing the xylem fiber with stronger toughness according to claim 6, wherein the method for preparing the pre-modified wood fiber in the step (2) comprises the following steps: using small molecular collagen at 20K,At a speed ofBombarding the fiber, and naturally cooling to room temperature to obtain the pre-modified wood fiber.

9. The method for preparing the xylem fiber with stronger toughness according to claim 6, wherein the method for preparing the modified wood fiber in the step (3) comprises the following steps: soaking the pre-modified wood fiber in a saturated carboxymethyl chitosan solution, adding glutaraldehyde, stirring and reacting for 3 hours, controlling the temperature to be kept at 50 ℃, cooling to 35 ℃, and standing for 24 hours to obtain the modified wood fiber.

10. The method for preparing stronger flexible wood fiber according to claim 6, wherein the method for preparing stronger flexible wood fiber in the step (4) comprises: preparing a 3% tetrahydrofuran solution, heating to 70 ℃, soaking the modified wood fiber in the tetrahydrofuran solution, stirring for reaction for 12 hours, cooling to 50 ℃ for filtration, collecting filter residues, washing the filter residues with deionized water, drying, centrifuging, setting the rotation speed to 6000rpm, carrying out freeze drying, spraying with glycerol, carrying out hot air drying, and carrying out alloy ball milling for crushing to obtain the xylem fiber with strong toughness.

Technical Field

The invention relates to the technical field of fibers, in particular to a xylem fiber with high toughness and a preparation method thereof.

Background

Wood fiber is a mechanical tissue composed of thickened cell walls and fibrous cells having fine crevice-like pores, which are lignified, and is one of the main components constituting xylem. The wood fiber used in the textile and clothing industry is viscose fiber which is converted from wood pulp through a production process and is cellulose fiber. The method comprises the steps of crushing wood, cooking at high temperature to prepare wood pulp, removing sugar and lipid in the wood pulp, extracting plant cellulose, and remolding cellulose molecules to obtain the textile raw material. The toughness of the wood fiber on the market at present is not enough, so that the design of the wood fiber with stronger toughness is necessary.

Disclosure of Invention

The present invention is directed to a strong and tough xylem fiber, which solves the above problems of the prior art.

In order to solve the technical problems, the invention provides the following technical scheme: the xylem fiber with stronger toughness comprises the following raw materials in parts by weight:

50-70 parts of modified wood fiber, 10-15 parts of glycerol and a plurality of deionized water.

Preferably, the modified wood fiber is prepared by dissolving wood fiber in ionic liquid and then sequentially carrying out pretreatment operation and pre-modification operation.

Preferably, the pretreatment operation is to centrifuge the wood fiber solution, solidify the wood fiber solution, and then dry the surface of the wood fiber solution to prepare the wood fiber membrane.

Preferably, the pre-modification operation is to perform micromolecular collagen bombardment on the wood fiber membrane, and polymerize macromolecular collagen in the grain holes of the wood fibers to fill the grain holes of the wood fibers.

Preferably, the ionic liquid is a 95% solution of 1-butyl-3-methylimidazole chloride.

The second aspect of the invention provides a preparation method of xylem fiber with stronger toughness, which comprises the following specific steps:

(1) preparation of pretreated wood fiber: centrifuging the wood fiber solution, solidifying, and drying the surface to obtain pretreated wood fiber;

(2) preparing pre-modified wood fiber: bombarding the pretreated wood fiber obtained in the step (1) with micromolecular collagen to obtain a pre-modified wood fiber;

(3) preparing modified wood fiber: crosslinking collagen and carboxymethyl chitosan to prepare modified wood fibers in the pre-modified wood fiber structure obtained in the step (2);

(4) preparing the xylem fiber with stronger toughness: and (4) soaking the modified wood fiber obtained in the step (3) by using tetrahydrofuran, centrifuging, and spraying glycerol to obtain the xylem fiber with strong toughness.

Preferably, the preparation method of the pretreated wood fiber in the step (1) comprises the following steps: mixing the wood fiber with sugar and lipid removed with ionic liquid, vacuum homogenizing, dissolving the wood fiber in standing liquid under the action of shearing force, centrifuging the mixed solution at normal temperature, setting the rotation speed at 6000rpm, centrifuging for 10min, removing impurities and bubbles to obtain a wood fiber solution, adding the centrifuged supernatant into a polyvinyl chloride-coated mold, horizontally standing for 5h, soaking the film liquid in deionized water for 24h after solidification and forming, coating glycerol on the surface, and performing vacuum drying to obtain the pretreated wood fiber.

Preferably, the preparation method of the pre-modified wood fiber in the step (2) comprises the following steps: using small molecular collagen at 20K,Bombarding the pretreated wood fiber at fs speed, and naturally cooling to room temperature to obtain the pre-modified wood fiber.

Preferably, the preparation method of the modified wood fiber in the step (3) comprises the following steps: soaking the pre-modified wood fiber in a saturated carboxymethyl chitosan solution, adding glutaraldehyde, stirring and reacting for 3 hours, controlling the temperature to be kept at 50 ℃, cooling to 35 ℃, and standing for 24 hours to obtain the modified wood fiber.

Preferably, the preparation method of the xylem fiber with stronger toughness in the step (4) comprises the following steps: preparing a 3% tetrahydrofuran solution, heating to 70 ℃, soaking the modified wood fiber in the tetrahydrofuran solution, stirring for reaction for 12 hours, cooling to 50 ℃ for filtration, collecting filter residues, washing the filter residues with deionized water, drying, centrifuging, setting the rotation speed to 6000rpm, carrying out freeze drying, spraying with glycerol, carrying out hot air drying, and carrying out alloy ball milling for crushing to obtain the xylem fiber with strong toughness.

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

the xylem is the main component of the trunk and has important economic value, wherein the main component is wood fiber, the wood fiber with sugar and lipid removed is mixed with ionic liquid, the mixture is homogenized in vacuum, the wood fiber is dissolved in the ionic liquid under the action of shearing force, then the mixed solution is centrifuged at normal temperature, the set rotating speed is 6000rpm, the centrifugation time is 10min, impurities and air bubbles are removed, a wood fiber solution is obtained, then the centrifuged supernatant is added into a mould coated with polyvinyl chloride, the mould is horizontally placed for 5h, deionized water is used for soaking for 24h after the membrane liquid is solidified and formed, glycerin is coated on the surface of the mould, and the wood fiber membrane is prepared by vacuum drying, thus obtaining the pretreated wood fiber; bombarding the wood fiber membrane by using micromolecular collagen, so that the micromolecular collagen is embedded into the fine crack-shaped veins of the wood fibers, polymerizing the misfolded micromolecular collagen through the hydrophobic effect among protein molecules, polymerizing macromolecular collagen in the fine crack-shaped veins of the wood fibers to fill the wood fiber veins, and thus obtaining the pre-modified wood fibers; the embedding of macromolecular collagen makes the molecular structure of wood fibre change, effectively weakens the effort between wood fibre molecule, preliminarily softens the rigid structure of wood fibre, strengthens the toughness of lignin.

Collagen has a large number of active centers and can react with various substances; dissolving carboxymethyl chitosan in water, soaking pre-modified wood fiber in carboxymethyl chitosan solution, under the catalytic action of glutaraldehyde, performing dehydration condensation on the carboxymethyl chitosan and collagen molecules for crosslinking, inserting generated pi bonds into the wood fiber structure, wherein the collagen molecules have extremely strong hygroscopicity, and the collagen expands in volume after absorbing water, so that the molecular structure of the wood fiber can be expanded, the rigid structure of the wood fiber is further softened, and the toughness of the wood fiber is enhanced; under the activation of protein, amino polymerization occurs between adjacent carboxymethyl chitosan, the amino polymerization is combined with pi bonds generated by collagen and carboxymethyl chitosan, a two-dimensional molecular chain is generated to be inserted into the molecular structure of the wood fiber, the modified wood fiber is prepared, the two-dimensional molecular chain interacts with the fan-shaped structure of the wood fiber, a more flexible double-layer crossed reticular chain is formed, the compressive capacity of the wood fiber is enhanced, and meanwhile, the tensile strength and the elongation at break of the wood fiber are improved.

Heating and soaking the modified wood fiber by using 3% tetrahydrofuran to dissolve polyvinyl chloride in the tetrahydrofuran, filtering, collecting filter residue, repeatedly washing the filter residue by using deionized water, drying the filter residue after centrifugation, spraying glycerol on the filter residue, and ball-milling the filter residue after drying to obtain the xylem fiber with strong toughness; the glycerin can weaken the interaction force between wood fiber molecules and in the molecules, active groups in the glycerin can be inserted between molecular chains of collagen and carboxymethyl chitosan to form interchain hydrogen bonds with hydroxyl, carbonyl and amino in the glycerin, and the toughness, tensile strength and elongation at break of the wood fiber are increased again while the rigid structure of the wood fiber is softened.

Detailed Description

The technical solutions in the embodiments of the present invention will be 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.

The invention provides the technical scheme that: the xylem fiber with stronger toughness comprises the following raw materials in parts by weight:

50-70 parts of modified wood fiber, 10-15 parts of glycerol and a plurality of deionized water.

Preferably, the modified wood fiber is prepared by dissolving wood fiber in ionic liquid and then sequentially carrying out pretreatment operation and pre-modification operation.

Preferably, the pretreatment operation is to centrifuge the wood fiber solution, solidify the wood fiber solution, and then dry the surface of the wood fiber solution to prepare the wood fiber membrane.

Preferably, the pre-modification operation is to perform micromolecular collagen bombardment on the wood fiber membrane, and polymerize macromolecular collagen in the grain holes of the wood fibers to fill the grain holes of the wood fibers.

Preferably, the ionic liquid is 95% 1-butyl-3-methylimidazole chloride.

The second aspect of the invention provides a preparation method of xylem fiber with stronger toughness, which comprises the following specific steps:

(1) preparation of pretreated wood fiber: centrifuging the wood fiber solution, solidifying, and drying the surface to obtain pretreated wood fiber;

(2) preparing pre-modified wood fiber: bombarding the pretreated wood fiber obtained in the step (1) with micromolecular collagen to obtain a pre-modified wood fiber;

(3) preparing modified wood fiber: crosslinking collagen and carboxymethyl chitosan to prepare modified wood fibers in the pre-modified wood fiber structure obtained in the step (2);

(4) preparing the xylem fiber with stronger toughness: and (4) soaking the modified wood fiber obtained in the step (3) by using tetrahydrofuran, centrifuging, and spraying glycerol to obtain the xylem fiber with strong toughness.

Preferably, the preparation method of the pretreated wood fiber in the step (1) comprises the following steps: mixing the wood fiber with sugar and lipid removed with ionic liquid, vacuum homogenizing, dissolving the wood fiber in the ionic liquid under the action of shearing force, centrifuging the mixed solution at normal temperature with the rotation speed of 6000rpm for 10min to remove impurities and bubbles to obtain a wood fiber solution, adding the centrifuged supernatant into a polyvinyl chloride-coated mold, horizontally standing for 5h, soaking the film liquid in deionized water for 24h after solidification and forming, coating glycerol on the surface, and vacuum drying to obtain the pretreated wood fiber.

Preferably, the preparation method of the pre-modified wood fiber in the step (2) comprises the following steps: using small molecular collagen at 20K,Bombarding the pretreated wood fiber at fs speed, and naturally cooling to room temperature to obtain the pre-modified wood fiber.

Preferably, the preparation method of the modified wood fiber in the step (3) comprises the following steps: soaking the pre-modified wood fiber in a saturated carboxymethyl chitosan solution, adding glutaraldehyde, stirring and reacting for 3 hours, controlling the temperature to be kept at 50 ℃, cooling to 35 ℃, and standing for 24 hours to obtain the modified wood fiber.

Preferably, the preparation method of the xylem fiber with stronger toughness in the step (4) comprises the following steps: preparing a 3% tetrahydrofuran solution, heating to 70 ℃, soaking the modified wood fiber in the tetrahydrofuran solution, stirring for reaction for 12 hours, cooling to 50 ℃ for filtration, collecting filter residues, washing the filter residues with deionized water, drying, centrifuging at the set rotating speed of 6000rpm, spraying with glycerol after freeze drying, drying with hot air, and grinding with an alloy ball mill to obtain the xylem fiber with strong toughness.

Example 1: a xylem fiber I with stronger toughness:

a xylem fiber with stronger toughness comprises the following fiber components in parts by weight:

68 parts of modified wood fiber, 15 parts of glycerol and a plurality of deionized water.

The preparation method of the xylem fiber comprises the following steps:

(1) preparation of pretreated wood fiber: centrifuging the wood fiber solution, solidifying, and drying the surface to obtain pretreated wood fiber;

(2) preparing pre-modified wood fiber: bombarding the pretreated wood fiber obtained in the step (1) with micromolecular collagen to obtain a pre-modified wood fiber;

(3) preparing modified wood fiber: crosslinking collagen and carboxymethyl chitosan to prepare modified wood fibers in the pre-modified wood fiber structure obtained in the step (2);

(4) preparing the xylem fiber with stronger toughness: and (4) soaking the modified wood fiber obtained in the step (3) by using tetrahydrofuran, centrifuging, and spraying glycerol to obtain the xylem fiber with strong toughness.

Preferably, the preparation method of the pretreated wood fiber in the step (1) comprises the following steps: mixing the wood fiber with sugar and lipid removed with ionic liquid, vacuum homogenizing, dissolving the wood fiber in the ionic liquid under the action of shearing force, centrifuging the mixed solution at normal temperature with the rotation speed of 6000rpm for 10min to remove impurities and bubbles to obtain a wood fiber solution, adding the centrifuged supernatant into a polyvinyl chloride-coated mold, horizontally standing for 5h, soaking the film liquid in deionized water for 24h after solidification and forming, coating glycerol on the surface, and vacuum drying to obtain the pretreated wood fiber.

Preferably, the preparation method of the pre-modified wood fiber in the step (2) comprises the following steps: using small molecular collagen at 20K,Bombarding the pretreated wood fiber at fs speed, and naturally cooling to room temperature to obtain the pre-modified wood fiber.

Preferably, the preparation method of the modified wood fiber in the step (3) comprises the following steps: soaking the pre-modified wood fiber in a saturated carboxymethyl chitosan solution, adding glutaraldehyde, stirring and reacting for 3 hours, controlling the temperature to be kept at 50 ℃, cooling to 35 ℃, and standing for 24 hours to obtain the modified wood fiber.

Preferably, the preparation method of the xylem fiber with stronger toughness in the step (4) comprises the following steps: preparing a 3% tetrahydrofuran solution, heating to 70 ℃, soaking the modified wood fiber in the tetrahydrofuran solution, stirring for reaction for 12 hours, cooling to 50 ℃ for filtration, collecting filter residues, washing the filter residues with deionized water, drying, centrifuging at the set rotating speed of 6000rpm, spraying with glycerol after freeze drying, drying with hot air, and grinding with an alloy ball mill to obtain the xylem fiber with strong toughness.

Example 2: a xylem fiber II with stronger toughness:

a xylem fiber with stronger toughness comprises the following fiber components in parts by weight:

59 parts of modified wood fiber, 13 parts of glycerol and deionized water.

The preparation method of the xylem fiber comprises the following steps:

(1) preparation of pretreated wood fiber: centrifuging the wood fiber solution, solidifying, and drying the surface to obtain pretreated wood fiber;

(2) preparing pre-modified wood fiber: bombarding the pretreated wood fiber obtained in the step (1) with micromolecular collagen to obtain a pre-modified wood fiber;

(3) preparing modified wood fiber: crosslinking collagen and carboxymethyl chitosan to prepare modified wood fibers in the pre-modified wood fiber structure obtained in the step (2);

(4) preparing the xylem fiber with stronger toughness: and (4) soaking the modified wood fiber obtained in the step (3) by using tetrahydrofuran, centrifuging, and spraying glycerol to obtain the xylem fiber with strong toughness.

Preferably, the preparation method of the pretreated wood fiber in the step (1) comprises the following steps: mixing the wood fiber with sugar and lipid removed with ionic liquid, vacuum homogenizing, dissolving the wood fiber in the ionic liquid under the action of shearing force, centrifuging the mixed solution at normal temperature, setting the rotation speed at 6000rpm, centrifuging for 10min, removing impurities and bubbles to obtain a wood fiber solution, adding the centrifuged supernatant into a polyvinyl chloride-coated mold, horizontally standing for 5h, soaking the film liquid in deionized water for 24h after solidification and forming, coating glycerol on the surface, and performing vacuum drying to obtain the pretreated wood fiber.

Preferably, the preparation method of the pre-modified wood fiber in the step (2) comprises the following steps: using small molecular collagen at 20K,Bombarding the pretreated wood fiber at fs speed, and naturally cooling to room temperature to obtain the pre-modified wood fiber.

Preferably, the preparation method of the modified wood fiber in the step (3) comprises the following steps: soaking the pre-modified wood fiber in a saturated carboxymethyl chitosan solution, adding glutaraldehyde, stirring and reacting for 3 hours, controlling the temperature to be kept at 50 ℃, cooling to 35 ℃, and standing for 24 hours to obtain the modified wood fiber.

Preferably, the preparation method of the xylem fiber with stronger toughness in the step (4) comprises the following steps: preparing a 3% tetrahydrofuran solution, heating to 70 ℃, soaking the modified wood fiber in the tetrahydrofuran solution, stirring for reaction for 12 hours, cooling to 50 ℃ for filtration, collecting filter residues, washing the filter residues with deionized water, drying, centrifuging, setting the rotation speed to 6000rpm, carrying out freeze drying, spraying with glycerol, carrying out hot air drying, and carrying out alloy ball milling for crushing to obtain the xylem fiber with strong toughness.

Comparative example 1:

the preparation method of the common xylem fiber comprises the following steps: cleaning trees and the like, carrying out ball milling and crushing to prepare 10-200-mesh xylem fiber powder, soaking the xylem fiber powder by using a methanol solution, filtering, taking a filtrate, mixing the filtrate with an ethyl acetate solution, stirring for half an hour, standing for layering, carrying out centrifugal concentration on a supernatant, adding a dispersing agent and water, uniformly stirring, and drying to prepare the xylem fiber.

Comparative example 2:

comparative example 2 was formulated as in example 1. The method for producing the ligneous fibers differs from example 1 only in that the production in steps (1) and (2) is not performed, and the remaining production steps are the same as in example 1.

Comparative example 3:

the formulation of comparative example 3 was the same as example 1. The method for producing the ligneous fiber differs from example 1 only in that the production in steps (3) and (4) is not performed, and the remaining production steps are the same as in example 1.

Test example 1:

the tensile properties of the wood fibers of example 1, example 2 and comparative example 2 were compared, and the control group was a common wood fiber, and the experimental results were as follows:

	example 1	Example 2	Comparative example 2	Control group
					Tensile strength/MPa	3389	3321	2136	1891

The tensile property of the wood fiber is the resistance of the maximum uniform plastic deformation of the wood fiber, and is the critical value of the uniform plastic deformation and the direction change local concentrated plastic deformation, and the table shows that the tensile strength of the components in the embodiment 1 and the embodiment 2 is not greatly different, but is far greater than that of the components in the comparative example 2 and the comparative example, so that the interaction of the two-dimensional molecular chain and the fan-shaped structure of the wood fiber per se is illustrated, a more flexible double-layer crossed reticular chain is formed, the compressive capacity of the wood fiber is enhanced, and the tensile strength of the wood fiber is improved.

Test example 2:

the wood part fibers of example 1, example 2 and comparative example 2 were compared for elongation at break, and the control group was a common wood part fiber with the formula of e ═ L (L)_a-L₀)/L₀Wherein e is the elongation at break, L₀Is the original length of the sample, L_aThe length of the test piece at the time of breaking is as follows:

	example 1	Example 2	Comparative example 2	Control group
					La/cm	3.00	3.00	3.00	3.00
L0/cm	3.25	3.24	3.13	3.08
					e/％	8.33	8.00	4.33	2.67

The elongation at break is an index for representing the softness and toughness of the fibers, the larger the elongation at break, the better the softness and toughness of the fibers, and as can be seen from the table above, the elongation at break of the components in example 1 is not much different from that of the components in example 2, but is much larger than that of the comparative examples 2 and the comparative examples, which shows that the interaction between the two-dimensional molecular chain and the fan-shaped structure of the wood fibers per se forms a more flexible double-layer cross-linked network chain, and the compressive capacity and tensile strength of the wood fibers per se are enhanced, and the elongation at break of the wood fibers is increased.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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.