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Method for preparing self-repaired polymer composite material

A composite material and polymer technology, applied in the field of self-healing polymer composite materials, can solve the problems of easy sublimation, insufficient reaction, poor mechanical properties, etc., to improve mechanical properties, avoid insufficient reaction, and enhance mechanical properties Effect

Inactive Publication Date: 2018-09-04
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a self-healing polymer composite material in order to improve the poor mechanical properties of existing self-healing polymer materials and the problem that the urea providing N-H groups is easily sublimated during the reaction process resulting in insufficient reaction

Method used

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  • Method for preparing self-repaired polymer composite material
  • Method for preparing self-repaired polymer composite material
  • Method for preparing self-repaired polymer composite material

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specific Embodiment approach 1

[0018] Specific implementation mode 1: This implementation mode records a method for preparing a self-healing polymer composite material, and the specific steps of the method are as follows:

[0019] Step 1: Preparation of amidated carbon nanotubes: At room temperature, ultrasonically disperse 300 to 500 mg of ureidopropyltrimethoxysilane in a mixed solution of ethanol and water. The total volume of the solution after mixing is 250 mL. Among them, ethanol and water The volume ratio is 3:1, the ultrasonic time is 1 hour, and the ultrasonic power is 150W. It can be dispersed more uniformly by ultrasonic, and then 100~200mg of surface hydroxylated carbon nanotubes are added to the mixed solution obtained above. Heating in a water bath at a temperature of 70°C, followed by condensation and reflux to obtain surface amidated carbon nanotubes; by performing infrared testing on the reacted amidated carbon nanotubes, Table 1, figure 1 with figure 2 ,by comparison figure 2 and figu...

specific Embodiment approach 2

[0022] Embodiment 2: In the preparation method of a self-healing polymer composite material described in Embodiment 1, in step 1, the heating time in the water bath is 4 hours.

specific Embodiment approach 3

[0023] Embodiment 3: In the method for preparing a self-healing polymer composite material described in Embodiment 1, in step 1, the condensation and reflux time is 2 h, 4 h, 6 h or 8 h.

[0024] Table 1 Mechanical property test of amidated carbon nanotube self-healing polymer

[0025]

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Abstract

The invention discloses a method for preparing a self-repaired polymer composite material and belongs to the technical field of self-repairing material preparation. To solve the problems that a conventional self-repaired polymer material is poor in mechanical property, and insufficient reactions can be caused since urea for providing N-H groups is liable to sublimate in the reaction process, the method comprises the following steps: firstly, performing grafting modification on hydroxylation multiwalled carbon nanotubes with urea propyl trimethoxy silane, secondly, performing cross-linking polymerization with dimer acid and diethylenetriamine so as to generate a polymer, and finally enabling the surface grafted carbon nanotubes as a reactant to react with the polymer, thereby obtaining theself-repaired polymer composite material with dynamic hydrogen bonds. The method has the advantages that due to the nano-grade reinforcement properties of the carbon nanotubes, the mechanical properties of the material are improved, and the practicability of the material is improved; due to cross-linking polymerization reactions of the amidate carbon nanotubes, and due to a nano dimension effect of a nano material, reactions can be carried out relatively sufficiently.

Description

technical field [0001] The invention belongs to the technical field of self-repairing material preparation, and in particular relates to a preparation method of a self-repairing polymer composite material. Background technique [0002] In recent years, organic polymers have become the basic materials of modern life due to their low cost, strong processability and high functionality, and are used in various industries such as textiles, household appliances, packaging industry, consumer electronics, automobiles and aircrafts. However, these polymers are constantly exposed to the environment, chemical attack, radiation damage, mechanical wear, impact and thermal decomposition, etc., which will reduce the physical properties of the material and cause irreversible damage. Ordinary cracks can be repaired by bonding, welding, etc., but the micro-cracks generated inside the material are difficult to detect macroscopically, and the generation of micro-cracks will reduce the performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/08C08K9/06C08K3/04C08G69/34
CPCC08G69/34C08K3/041C08K9/06C08L77/08
Inventor 姜大伟王莹孙才英李斌许苗军吴子剑陈月赖晓幸冯乃艺
Owner NORTHEAST FORESTRY UNIVERSITY
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