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Elastic shape memory material with repeated self-repairing function and preparation method thereof

A memory material and self-healing technology, applied in the field of shape memory materials, can solve the problems that shape memory materials are difficult to achieve rapid self-healing, limitations, etc.

Inactive Publication Date: 2013-01-23
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the existing shape memory materials have good elasticity when the temperature is higher than the shape recovery temperature, but they are quasi-plastic or brittle when the temperature is lower than the shape recovery temperature. The application is subject to more restrictions

Method used

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  • Elastic shape memory material with repeated self-repairing function and preparation method thereof
  • Elastic shape memory material with repeated self-repairing function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The elastic shape memory material with multiple fast self-repairing functions of the present invention selects 40 parts of hot melt adhesive based on ethylene-vinyl acetate according to the volume fraction, and silicone rubber composed of a two-component elastomer and a curing agent 60 parts, the method for preparing the present invention: (a), first cut the purchased hot-melt glue stick into small pieces, and mix the hot-melt glue piece with the purchased liquid silicone rubber elastomer in a container according to the proportion; (b) 1. Heat the above mixture to above the melting point of the hot melt adhesive (50°C) (70°C ~ 100°C), stir well until there are no particles visible to the naked eye in the mixture; (c), drop the mixture obtained in step (b) to room temperature for 20 After ℃ ~ 24 ℃, mix and cure according to the mass ratio of silicone rubber elastomer and curing agent of 10:1, and stir it evenly again; (d), pour the fully mixed mixture into the mold, and p...

Embodiment 2

[0035] Select 15 parts of hot melt adhesive based on ethylene-vinyl acetate by volume, 85 parts of silicone rubber composed of two-component elastomer and curing agent, and the mass ratio of silicone rubber elastomer to curing agent is 5. : 0.5 ratio of mixing and curing, at 100 ℃, after curing for 1 hour, the desired finished product can be obtained. Others are the same as in Embodiment 1, and will not be repeated.

Embodiment 3

[0037] Select 20 parts of hot melt adhesive based on ethylene-vinyl acetate by volume, 80 parts of silicone rubber composed of two-component elastomer and curing agent, and the mass ratio of silicone rubber elastomer to curing agent is 15. : The ratio of 1.5 is mixed and solidified, and the others are the same as in Example 1, and will not be repeated.

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Abstract

The invention discloses an elastic shape memory material with a repeated self-repairing function and a preparation method thereof. The elastic shape memory material with the repeated self-repairing function comprises the following components in parts by volume: 60-85 parts of silicon rubber and 15-40 parts of hot melt glue. The preparation method comprises the following steps of: firstly, cuttinga hot melt glue stick into small blocks and mixing the hot melt glue blocks and liquid silicon rubber elastomers according to the proportion; heating a mixture to above the melting point of the hot melt glue, and sufficiently stirring until no macroscopic particles exist in the mixture; after the mixture is cooled to the room temperature, mixing the silicon rubber elastomers and a curing agent ina proportion of (5-15): (0.5-1.5), then curing, and uniformly stirring again; pouring the sufficiently mixed mixture into a mould, and placing the mixture into a vacuum drying oven with the vacuum degree of 1Pa to remove air bubbles in the mixture; curing the mixture at room temperature for 24h; or curing at 100 DEG C for 1h; or curing at 150 DEG C for 15min to obtain the required finished product.

Description

technical field [0001] The invention relates to a shape memory material, in particular to an elastic shape memory material with multiple rapid self-repair functions and a preparation method thereof. Background technique [0002] After quasi-plastic deformation, shape memory materials (including some alloys and polymer materials, etc.) can return to their original shape under appropriate stimulation. This phenomenon is called the shape memory effect. The main factors affecting the recovery of shape memory alloys are temperature or magnetic field, and for shape memory polymers, in addition to temperature and magnetic field, it also includes light and humidity, etc., usually polymer materials with shape memory function, only in their shape memory When the transition temperature is above, the material is in an elastic state and has a certain degree of elasticity. [0003] Although different types of shape memory materials have different mechanism of shape memory effect, in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L23/08C08K7/14C08K7/06
Inventor 孙丽黄为民王倡春米向乾
Owner SHENYANG JIANZHU UNIVERSITY
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