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A kind of electric shape memory composite material and its preparation method and application

A composite material and memory technology, which is applied in the field of electromechanical shape memory composite materials and its preparation, can solve the problems of large influence of glass transition temperature, and achieve good electromechanical shape memory characteristics, shortened response time, improved modulus and tensile strength. The effect of tensile strength

Inactive Publication Date: 2018-05-08
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the glass transition temperature of the composite material also increased from 46.38°C to 57.28°C. It can be seen that the added carbon black and chopped carbon fiber have a great influence on the glass transition temperature of the composite material

Method used

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  • A kind of electric shape memory composite material and its preparation method and application
  • A kind of electric shape memory composite material and its preparation method and application
  • A kind of electric shape memory composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Preparation of electro-induced shape memory composite material: the sample of SIS / LDPE=30 / 70 was packaged in a plastic bag, and the irradiation source was used under the condition of limited air 60 The γ-ray irradiation of Co, the irradiation dose is respectively 50, 100, 150, 200, 250KGy, then adding content is 12% graphite, after mixing, kneading in X (S) K-400 rubber mixer, at 180 ℃ temperature, making it a uniform mixing material.

[0025] 2. Performance test

[0026] The tensile strength is measured with reference to GB1039-1992, and the tensile speed is 100mm / min.

[0027] Determination of gel content: Chop up the sample and weigh about 0.5g, wrap it in a 300-mesh copper mesh, use toluene as a solvent, and heat it to boil and reflux in a Soxhlet extractor for 72h. Then take out the sample package, wash it twice with acetone, dry it in vacuum at 60°C for 6 hours, take it out and weigh it, and calculate the gel content by formula (1).

[0028] Gel content = (m...

Embodiment 2

[0055] Embodiment 2: the preparation of electrographite / SIS / LDPE composite material

[0056] The sample of SIS:LDPE=30 / 70 is packaged in a plastic bag, and the irradiation source is adopted under the condition of limited air 60 The gamma ray irradiation of Co, the irradiation dosage is 100KGy respectively, then add content and be 24% graphite, after mixing, carry out molding on the XLZ-25T type plate vulcanizing machine, control mold temperature 180 ℃, pressure 10MPa, then cool 10min, make A flake of the blend with a thickness of about 2 mm was obtained.

Embodiment 3

[0057] Example 3: Application

[0058] The electro-graphite / SIS / LDPE composite material sheet in Example 2 is used in the micro-pump in the micro-electro-mechanical system. Under the application of 20-120v voltage, it has the ability to recover completely from deformation and can adapt to large deformation.

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Abstract

Provided are an electroshape memory composite material, a preparation method and applications. Styrene-isoprene-styrene segmented copolymers and low-density polyethylene (SIS / LDPE) with a weight ratio of 60:40-80:20 are subjected to radiation crosslinking, a polymer matrix is prepared, then graphite with a mass fraction of 6%-30% of the polymer matrix is added, and the mixture is blended. The invention also comprises a preparation method for an electrographite / SIS / LDPE composite material and applications. The electrographite / SIS / LDPE composite material has an electroshape memory characteristic. Experiments prove that when the graphite content is higher than 6%, the graphite / SIS / LDPE composite material has a good electroshape memory characteristic. In addition, under action of a certain voltage, the deformation reversion rate can reach 100%, the response time decreases along with increase of the graphite content, and the response time of a sample is shortened along with increase of the voltage. In addition, electrocirculation shape memory tests for many times show that the deformation reversion rates are all higher than 95%.

Description

technical field [0001] The invention relates to a shape memory material and its preparation method and application, in particular to an electro-induced shape memory composite material and its preparation method and application. Background technique [0002] Shape memory polymer refers to the deformation of the shaped polymer under certain conditions (such as heat, light, electricity, PH, etc.), this deformation can be preserved, and when it is stimulated again, the polymer A material that can be restored to its original shape. Since the 1980s, shape memory polymers have been greatly developed, and the development of thermotropic shape memory polymers is the most mature. Compared with shape memory alloys and shape memory ceramics, shape memory polymers have the advantages of small weight, low cost, large deformation, and easy processing. Therefore, shape memory polymers have shown great application potential in the research field of intelligent active deformation structures...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/02C08L23/06C08K3/04C08J3/28F04B43/00
CPCC08J3/28C08J2353/02C08J2423/06C08L53/02C08L2207/066F04B43/00C08L23/06C08K3/04
Inventor 王永坤田文超
Owner XIDIAN UNIV
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