Method for grafting hydroxyl terminated hyperbranched polymer to carbon fiber surface

A technology of hyperbranched polymer and grafted hydroxyl sealing technology, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of restricting modified carbon fiber, toxic synthetic raw materials, complex synthetic process, etc., and achieve improved interface properties, infiltration Improvement of sex and adhesiveness and reduction of environmental pollution

Active Publication Date: 2019-03-15
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of weak bonding between carbon fiber and resin matrix interface and complex synthesis process of hydroxyl-terminated hyperbranched polymer, and the synthetic raw materials are poisonous, which restricts its modification of carbon fiber, and provides a method of grafting hydroxyl-terminated hyperbranched polymer on the surface of carbon fiber. Method for Terminal Hyperbranched Polymers

Method used

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  • Method for grafting hydroxyl terminated hyperbranched polymer to carbon fiber surface
  • Method for grafting hydroxyl terminated hyperbranched polymer to carbon fiber surface
  • Method for grafting hydroxyl terminated hyperbranched polymer to carbon fiber surface

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specific Embodiment approach 1

[0052] Embodiment 1: This embodiment is a method for grafting hydroxyl-terminated hyperbranched polymers on the surface of carbon fibers, which is completed in the following steps:

[0053] 1. Preparation of hydroxyl-terminated hyperbranched polymers:

[0054] ①. Add isophorone diisocyanate and N,N-dimethylacetamide into a glass container to obtain isophorone diisocyanate solution; then place the glass container containing isophorone diisocyanate solution in In an ice-water bath at 0°C to 5°C;

[0055] The volume ratio of the mass of isophorone diisocyanate described in step 1. to N,N-dimethylacetamide is (6g~12g):50mL;

[0056] ②. Add tris to N,N-dimethylacetamide, and then ultrasonically mix for 10-20 minutes to obtain a tris solution;

[0057] The volume ratio of the mass of tris in step 1 ② to N,N-dimethylacetamide is (3g~6g):50mL;

[0058] ③. Stir the isophorone diisocyanate solution in a glass container in an ice-water bath at 0°C to 5°C in step ①, at a stirring speed...

specific Embodiment approach 2

[0091]Specific embodiment two: the difference between this embodiment and specific embodiment one is: the volume ratio of the quality of isophorone diisocyanate and N,N-dimethylacetamide described in step one 1. is (10g~12g ): 50mL. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0092] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass ratio of the tris hydroxymethylaminomethane described in step 2. to N,N-dimethylacetamide is (5g~6g): 50mL. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for grafting a hydroxyl terminated hyperbranched polymer to a carbon fiber surface, relating to a modification method for a carbon fiber surface. The method is directed to solve the problem that the modification of carbon fibers is restricted by weak interface bonding between the carbon fibers and a resin matrix, complexity of a synthetic process of the hydroxyl terminated hyperbranched polymer, and toxicity of synthetic raw materials. The method comprises the following steps: 1, preparation of a hydroxyl terminated hyperbranched polymer; 2, extraction of carbon fibers; 3, oxidation; and 4, grafting to obtain surface grafted hydroxyl terminated hyperbranched polymer carbon fibers. Since the hydroxyl terminated hyperbranched polymer has a large amount of polar hydroxyl groups and pore structures, after the polymer is grafted to the carbon fiber surface, the wettability and cohesiveness between the carbon fibers and the resin are remarkably improved, which greatly improves the interfacial properties of the composite material, and improves the mechanical properties and thermal stability of the composite material. The invention can obtain a method for grafting a hydroxyl terminated hyperbranched polymer to a carbon fiber surface.

Description

technical field [0001] The invention relates to a method for modifying the surface of carbon fibers. Background technique [0002] In recent years, carbon fiber (CF) has been widely used as an ideal reinforcement for advanced composites due to its high strength and high modulus. The performance of carbon fiber reinforced polymer (CFRP) composites largely depends on the interfacial properties, high quality The interface is the guarantee of uniform load transfer from the resin to the carbon fiber. However, because the surface of carbon fiber is smooth and chemically inert, the surface energy is low, and the wettability and adhesion with the resin matrix are poor, which ultimately affects the interfacial properties and other properties of the composite material. Therefore, the surface treatment of carbon fiber is crucial to the development of its reinforced materials Importantly, the interface between unmodified carbon fiber and resin matrix is ​​weak at present, and the inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/564D06M11/50D06M11/65C08G18/75C08G18/32D06M101/40
CPCC08G18/3281C08G18/755D06M11/50D06M11/65D06M15/564D06M2101/40
Inventor 宋国君石龙龙马丽春李培耀
Owner QINGDAO UNIV
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