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Polymer group composite material self-repairing nano-scale capsule and preparation method thereof

A composite material and self-healing technology, applied in the directions of microcapsule preparation, microsphere preparation, etc., can solve the problems of reducing the mechanical properties of polymer-based composite materials, large size, shortening service life, etc., and achieves low equipment performance requirements and preparation methods. Simple, improve the effect of bonding problems

Inactive Publication Date: 2008-09-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of the existing self-healing microcapsules is large (the particle size of the microcapsules is greater than 1 μm, ranging from 1 to 500 μm), so it is difficult to play a repairing role in the early stage of crack occurrence (crack size is less than 800nm), resulting in continued crack expansion and reduced Mechanical properties of polymer matrix composites and reduced service life

Method used

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  • Polymer group composite material self-repairing nano-scale capsule and preparation method thereof
  • Polymer group composite material self-repairing nano-scale capsule and preparation method thereof
  • Polymer group composite material self-repairing nano-scale capsule and preparation method thereof

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specific Embodiment approach 1

[0011] Specific Embodiment 1: In this embodiment, the self-healing nano-scale capsules of polymer-based composite materials are composed of 10-100 parts by weight of urea, 10-200 parts of formaldehyde solution, 10-400 parts of dicyclopentadiene, and 0.03-10 parts Sodium dodecylbenzenesulfonate, 0.5-10 parts of resorcinol, 0.01-10 parts of n-butanol, 0.01-10 parts of octane, 5-50 parts of (3,2-epoxypropoxy) propyl It is made of trimethoxysilane and 30-600 parts of deionized water, and the pH value is adjusted with triethanolamine and glacial acetic acid solution.

[0012] In this embodiment, the self-healing nanoscale capsules of the polymer-based composite material can be used to repair tiny cracks with a crack size of 100-800nm, which can self-heal cracks as early as possible, prevent the spread and expansion of cracks, and reduce the damage caused by cracks in the polymer matrix. Composite mechanical properties are lost and can prolong the service life of polymer matrix comp...

specific Embodiment approach 2

[0013] Specific embodiment two: The difference between this embodiment and specific embodiment one is: the self-healing nano-capsules of polymer-based composite materials are composed of 20-80 parts of urea, 20-180 parts of formaldehyde solution, 20-350 parts of Parts of dicyclopentadiene, 0.1 to 8 parts of sodium dodecylbenzenesulfonate, 1 to 8 parts of resorcinol, 0.1 to 8 parts of n-butanol, 0.1 to 8 parts of octane, 10 to 45 parts (3, 2-glycidoxy) propyltrimethoxysilane and 30 to 600 parts of deionized water. Others are the same as the first embodiment.

specific Embodiment approach 3

[0014] Specific embodiment three: The difference between this embodiment and specific embodiment one is: polymer-based composite material self-healing nano-capsules are composed of 30-70 parts of urea, 40-150 parts of formaldehyde solution, 50-300 parts by weight Parts of dicyclopentadiene, 1 to 6 parts of sodium dodecylbenzenesulfonate, 2 to 7 parts of resorcinol, 1 to 6 parts of n-butanol, 1 to 6 parts of octane, 20 to 40 parts (3, 2-glycidoxy) propyltrimethoxysilane and 50-500 parts of deionized water. Others are the same as the first embodiment.

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Abstract

The invention discloses a polymer based composite material self-repairing nanometer class capsule and the preparation method thereof, relating to a composite material self-repairing capsule and the preparation method. The invention solves the problems that the prior self-repairing capsule is large in size, cannot bring the self-repairing function into play at the early stage of a crack occurrence. The nanometer class capsule is made by carbamide, formaldehyde solution, dicyclopentadiene, sodium dodecyl benzene sulfonate, resorcinol, normal butanol, octane, KH-560 and deionized water. The preparation method is that: 1. preparing prepolymer of Lauxite; 2. preparing microemulsion; 3. performing polymerization reaction; 4. cleaning, filtering and drying. The grain size of the self-repairing nanometer class capsule is 100 to 800 nm and the capsule can self-repair the nanometer class microcracks which occur on polymer based composite material, preventing the extension of the cracks, reducing the damage of mechanical performance of the polymer based composite material and prolonging the service life. The polymer based composite material self-repairing nanometer class capsule has the advantages of easy preparation, convenient operation, low requirement for the equipment performance and easy promotion.

Description

technical field [0001] The invention relates to a composite material self-repairing capsule and a preparation method thereof. Background technique [0002] Polymer matrix composites are widely used in military industry, aerospace, electronics, bionics and other fields due to their excellent performance. Microcracks of various sizes inevitably occur inside the polymer-based composites during use, mainly due to the stress concentration in the inclusions, holes and other defects in the composites, which lead to the breakage of chemical bonds in the molecule, and the cracks between macromolecules and macromolecules. produced by chain segment slippage. The expansion of cracks will cause damage to the interior of the composite material, degrade the performance of the material, and affect the service life of the material. [0003] The self-healing mechanism of the material is: when the material is damaged, the internal cracks of the material expand, causing the microcapsules to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C08L61/32C08L63/00
Inventor 王荣国刘文博赫晓东胡宏林李海燕
Owner HARBIN INST OF TECH
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