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Surface treating method of microcapsule for polymer based composite self-repair

A composite material and surface treatment technology, which is applied in the field of microcapsule surface treatment, can solve the problems of resin matrix tensile strength and impact strength decrease, and achieve the effects of increasing tensile strength, enhancing physical adsorption, and improving interface problems

Inactive Publication Date: 2011-05-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the tensile strength and impact strength of the resin matrix decrease significantly with the increase of the amount of microcapsules added to the connection between the existing microcapsules and the resin matrix. Surface treatment of microcapsules for self-healing matrix composites

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0008] Specific Embodiment 1: In this embodiment, the surface treatment method of the microcapsules used for self-repairing of polymer-based composite materials is as follows: 1. The silane coupling agent and deionized water are prepared into silane with a concentration of 0.01-0.05 g / ml Aqueous solution of coupling agent; 2. Soak the microcapsules accounting for 5-10% by mass of the solution obtained in step 1 in the solution obtained in step 1 for 10-20 minutes, take out the microcapsules, rinse them with deionized water for 2-3 times, and filter; 3. After drying the microcapsules at 50-60°C for 2-3 hours, dry them at room temperature for 24-48 hours.

[0009] In this embodiment, a coupling agent is used to treat the microcapsules, because one end of the coupling agent interacts with the active hydroxyl group in the microcapsule wall material urea-formaldehyde resin to form a covalent bond, so that the other end of the coupling agent contains amino or epoxy groups, Participa...

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment differs from Embodiment 1 in that the silane coupling agent described in step 1 is silane coupling agent KH-550, and the others are the same as Embodiment 1.

specific Embodiment approach 3

[0011] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the silane coupling agent described in step one is silane coupling agent KH-560, and the pH value of the solution is adjusted to 3-4 with 10% hydrochloric acid, Others are the same as in the first embodiment.

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Abstract

The invention provides a surface disposal method of microcapsule used for the self-repairing of polymer-based composite material, relating to a surface disposal method of microcapsule. The surface disposal method of the invention solves the problem that the connecting type of existing microcapsule and resin matrix leads the tensile strength and impact strength of the resin matrix to be obviously reduced with the increment of adding quantity of the microcapsule. The method of the invention is as follows: silane coupling agent is compounded as silane coupling agent water solution with the consistency of 0.01-0.05g / ml; the microcapsule with the weight percentage about the solution of 5-10% is dipped in the solution for 10-20 minutes, and taken out for rinsing and filtration; the capsule is then dried for 2-3 hours under the temperature of 50-60 DEG C, and is then dried for 24-48 hours under room temperature. The tensile strength and the impact strength of the microcapsule which is disposed by the invention and added to the epoxy resin are improved by 10-20%, compared with those of microcapsule which are not disposed by the invention and are added into the epoxy resin.

Description

technical field [0001] The invention relates to a surface treatment method of microcapsules. Background technique [0002] Polymer matrix composites are widely used in aerospace and other fields due to their excellent properties. However, polymer-based composites will inevitably produce microcracks during use. The expansion of cracks will lead to a decrease in the mechanical properties of the composite material, resulting in damage to the material, cracking between layers, and serious damage to the material, which will affect the quality of the material. service life. For this reason, embedding microcapsules loaded with repairing agents into resin matrices to achieve self-healing of polymer-based composites has become an issue of close concern. So far, NASA has cooperated with universities to study microcapsules for self-repair using urea-formaldehyde resin as the microcapsule wall material and dicyclopentadiene as the repair agent. , polypropylene, etc. are the microcaps...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/20B29C73/18
Inventor 王荣国刘文博李海燕赫晓东胡宏林张福华
Owner HARBIN INST OF TECH
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