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Shape memory material with electrical response characteristics and its prepn process

A memory material and electrical response technology, applied in the field of functional polymer materials, can solve the problems that the heat cannot reach the controlled part, and the heat is difficult to quantitatively control, etc., to achieve the effect of easy access to the controlled part, convenient control, and quantitative control.

Inactive Publication Date: 2005-07-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages in the prior art that when the shape memory characteristics are realized by heating, the heat cannot be quantitatively controlled in the heating method, and the heat cannot reach the controlled parts in some special occasions. The present invention proposes a shape memory with electric response characteristics Memory material and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] This example is to prepare a shape memory material with low response voltage and electrical response characteristics.

[0009] In the implementation of this embodiment, 100 parts of polycaprolactone with a relative molecular weight of 80 kg / mol, 45 parts of conductive carbon fibers, 8 parts of trimethylolpropane acrylate, and 5 parts of silicone oil were mixed on a mixer for 20 minutes. Then press it into a sheet and irradiate with gamma rays with a dose of 100kGy. Heat the irradiated sheet in hot water at 80°C for 10 minutes, stretch it to twice its original length, and cool it to room temperature under the condition of stress, so that the shape memory material with electrical response characteristics can be prepared. This material can return to its original shape in 5 minutes under the action of a voltage of 75V.

Embodiment 2

[0011] This example is to prepare a shape memory material with fast response rate and electrical response characteristics.

[0012] In the implementation of this embodiment, 100 parts of polybutylene adipate with a relative molecular mass of 50 kg / mol, 40 parts of conductive carbon black, 10 parts of pentaerythritol triacrylate, and 5 parts of calcium stearate were mixed on a mixer After kneading for 20 minutes, it was pressed into a sheet and irradiated with an electron accelerator at 200 kGy. Heat the irradiated sheet in hot water at 80°C for 10 minutes, stretch it to twice its original length, and cool it to room temperature in the presence of stress to prepare a material with memory properties. This material can return to its original shape in 2 minutes under the action of a voltage of 200V.

Embodiment 3

[0014] This example is to prepare a high-strength shape-memory material with electrical response characteristics.

[0015] In the implementation of this example, 100 parts of polycaprolactone with a relative molecular mass of 50 kg / mole, 20 parts of conductive carbon black, 5 parts of ethylene glycol diacrylate, and 20 parts of talcum powder were mixed on a mixer 15 minutes, and then pressed into a sheet, placed in the pulse reactor channel to irradiate 75kGy. Heat the irradiated sheet in hot water at 80°C for 10 minutes, stretch it to twice its original length, and cool it to room temperature in the presence of stress to prepare a material with memory properties. This material can return to its original shape in 4 minutes under the action of a voltage of 200V.

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PUM

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Abstract

The present invention relates to one kind of shape memory material with electrical response characteristic and its preparation process. The shape memory material is prepared with polyester as mother material and through mixing with conducting stuffing and other assistant. Specifically, the shape memory material consists of aliphatic polyester in 100 portions, conducting stuffing in 10-50 portions, multiple functional radical monomer in 0-10 powder and other assistant 0-30 portions. During the preparation, high energy ray is used to radiate the polymer, and radiation dosage and conducting stuffing content are altered to control the shrinking rate and shrinking force effectively. The material of the present invention has wide responding voltage range, may shrink in different voltages, and has the features of convenient control, easy forming and wide application range.

Description

(1) Technical field: [0001] The invention relates to a functional polymer material, which is a shape memory material with electric response characteristics and a preparation method thereof. (2) Technical background: [0002] Shape memory materials refer to the stimuli that can perceive environmental changes (such as temperature, force, electromagnetic, solvent, etc.), and adjust their mechanical parameters (such as shape, position, strain, etc.) material in a stable state. Shape memory materials have very important potential application value in intelligent structures in the fields of aviation, electronics, and biomedical engineering. In the past 20 years, they have made great progress, and shape memory materials are also called smart materials. (intelligent materials). Shape memory materials discovered so far mainly include shape memory alloys, shape memory polymers, and shape memory ceramics. Among them, compared with shape memory alloys and shape memory ceramics, shape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C61/06C08J3/28C08L67/00
Inventor 朱光明秦瑞丰许硕贵
Owner NORTHWESTERN POLYTECHNICAL UNIV
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