A preparation method of high-strength bio-based composite fiber and composite fiber

A composite fiber, bio-based technology, applied in the direction of fiber chemical characteristics, cellulose/protein conjugated rayon, wet spinning, etc., can solve the problem of low strength, irregular size and shape of graphene fibers, hindering graphene Fiber application and other issues, to achieve the effect of enhanced bonding, good electrical conductivity, and reduced stacking

Active Publication Date: 2022-05-13
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the irregular size and shape of graphene obtained by chemical synthesis, and the disordered stacking of graphene sheets, the strength of graphene fibers is not high, which greatly hinders the application of graphene fibers.

Method used

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  • A preparation method of high-strength bio-based composite fiber and composite fiber
  • A preparation method of high-strength bio-based composite fiber and composite fiber
  • A preparation method of high-strength bio-based composite fiber and composite fiber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: The preparation of high-strength bio-based composite fiber comprises the following steps:

[0028] (1) Preparation of graphene oxide solution: prepare 8 g / L graphene oxide (prepared by Hummers method) aqueous solution, add ammonia water to adjust pH to 5.

[0029] (2) Modification of graphene oxide: add KH550 accounting for 1% of the mass of graphene oxide to the graphene oxide solution, and stir at 25° C. for 8 hours to obtain a solution C containing modified graphene oxide.

[0030] (3) Modification of cellulose: 5 g of cotton linter fibers were mixed with 40 mL of 10% sodium hydroxide aqueous solution and 100 mL of absolute ethanol solution, and stirred and reacted at 40° C. for 4 h. Add 5g of sodium chloroacetate and stir the reaction at 70°C for 3h. After washing with absolute ethanol and drying, the modified cotton linter fibers were prepared into 8 g / L solution E with water as solvent.

[0031] (4) Preparation of spinning solution: Mix solution C ...

Embodiment 2

[0035] Embodiment 2: the preparation of high-strength bio-based composite fiber, comprising the following steps:

[0036] (1) Preparation of graphene oxide solution: prepare 10 g / L graphene oxide aqueous solution (prepared by Hummers method), add ammonia water to adjust pH to 8.

[0037] (2) Modification of graphene oxide: add KH550 accounting for 5% of the mass of graphene oxide to the graphene oxide solution, and stir at 25° C. for 5 h to obtain solution C containing modified graphene oxide.

[0038] (3) Modification of cellulose: 5 g of cotton linter fibers were mixed with 40 mL of 20% sodium hydroxide and 100 mL of absolute ethanol solution, and stirred and reacted at 50° C. for 2 h. Add 10g of sodium chloroacetate, and stir the reaction at 60°C for 4h. After washing with absolute ethanol and drying, the modified cotton linter fibers were prepared into a solution E of 10 g / L with water as a solvent.

[0039] (4) Preparation of spinning solution: Mix solution C and soluti...

Embodiment 3

[0043] Embodiment 3: the preparation of high-strength bio-based composite fiber, comprising the following steps:

[0044](1) Preparation of graphene oxide solution: prepare 15 g / L graphene oxide (prepared by Hummers method) aqueous solution. Aqueous ammonia was added to adjust the pH to 12.

[0045] (2) Modification of graphene oxide: add KH550 accounting for 10% of the mass of graphene oxide to the graphene oxide solution, stir at 25° C. for 4 hours, and obtain solution C.

[0046] (3) Modification of cellulose: 5 g of cotton linter fibers were mixed with 40 mL of 30% sodium hydroxide and 100 mL of absolute ethanol solution, and stirred and reacted at 40° C. for 1 h. Add 10g of sodium chloroacetate, and stir the reaction at 80°C for 2h. After washing with absolute ethanol and drying, the modified cotton linter fibers were prepared into a 15 g / L solution E with water as a solvent.

[0047] (4) Preparation of spinning solution: Mix solution C and solution E at a ratio of 100...

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Abstract

The invention discloses a preparation method of a high-strength bio-based composite fiber and the composite fiber. The preparation method comprises the following steps: (1) preparation of graphene oxide solution: preparation concentration is 8-15g / L graphene oxide aqueous solution; (2) modification of graphene oxide: adding appropriate amount of Modification with modifier B to obtain solution C; (3) modification of cellulose, followed by dissolving in ionized water to obtain solution E; (4) preparation of spinning solution: mixing solution C and solution E to obtain spinning solution; (5) Preparation of graphene oxide fibers; (6) Place the graphene oxide fibers in reducing agent F, and reduce them for 6-24 hours at 20-120° C. to obtain graphene composite fibers. The invention optimizes the structure of the fiber, and the strength of the prepared graphene fiber is obviously improved, and has good electrical conductivity.

Description

technical field [0001] The invention belongs to the field of graphene fiber preparation, and in particular relates to a preparation method of a high-strength bio-based composite fiber and the composite fiber. Background technique [0002] With the scarcity of resources and the increase of cost, the development of biomass fiber has far-reaching significance for the realization of low-carbon economy and energy saving and emission reduction. Biomass fiber can reduce the dependence on oil and greatly reduce the cost. At present, the development of biomass fiber mainly focuses on two aspects: one is to develop raw material resources and develop new production technologies. For example, using resources such as agricultural products and crop wastes, using biosynthesis technology to prepare biomass synthetic fibers such as polylactic acid, polybutylene succinate, and polytrimethylene terephthalate; using marine organisms such as chitin and seaweed Substances and various proteins ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/18D01F8/02C08B15/04D01D5/06
CPCD01F8/18D01F8/02C08B15/04D01D5/06
Inventor 暴宁钟张兆镕沈丽明吴健管图祥
Owner NANJING TECH UNIV
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