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

A composite material and functional technology, applied in the field of composite materials, can solve the problems of low mechanical strength of the coating layer, limited development and application, complex preparation methods, etc., achieve good commercial application value, controllable temperature response range, and preparation methods simple effect

Active Publication Date: 2021-01-26
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of this functional composite material is complicated, the mechanical strength of the coating layer is low, the repeatability is poor, and the matrix polyurethane also has many shortcomings, which greatly limits the subsequent development and application of this material.
[0005] The memory function of polyurethane shape memory materials comes from the combination of hard segments and soft segments. Both the stationary phase and recovery phase are composed of physical crosslinking points of hard and soft segments, which inevitably have disadvantages such as poor recovery force and easy permanent deformation.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Preparation of zinc oxide / sodium dodecylsulfonate / carbon nanotube ternary functional modifier.

[0070] Mix 0.05mol / L sodium dodecylsulfonate aqueous solution with carbon nanotubes and sonicate for 2 hours. After the sonication is completed, add 0.3mol / L zinc chloride aqueous solution, continue to sonicate for 3 hours, and then add 0.2mol / L hydrogen Sodium oxide aqueous solution, finally add hydrazine aqueous solution with a water content of 50%, react in an oil bath at 100°C for 24 hours, and form a black dispersion, centrifuge, wash with deionized water and ethanol alternately, and vacuum dry to obtain zinc oxide / dodecane Sodium sulfonate / carbon nanotube ternary functional modifier.

[0071] The mass ratio between carbon nanotubes, sodium dodecylsulfonate, zinc chloride, sodium hydroxide and hydrazine in the above-mentioned preparation process is:

[0072]

Embodiment 2

[0074] The zinc oxide / sodium dodecylsulfonate / carbon nanotube of Example 1 was used as a three-component functional modifier.

[0075] Weigh 100 parts by mass of trans-1,4-polyisoprene TPI-301 (TPI for short) and 0.002 parts by mass of a ternary functional modifier. First, the ternary functional modifier was ultrasonicated in 800 parts by mass of toluene for 1 h, then mixed with TPI and crosslinking agent and added into a three-necked flask, heated and stirred in an oil bath at 60° C. for 2.5 h at a stirring speed of 250 rpm. Then pour the stirred mixture into a Petri dish and dry it on a hot table at 100°C for 3 days. After drying, place it in a mold of 100mm×100mm×1mm and vulcanize it on a flat vulcanizer at 160°C and a pressure of 12MPa. After 20 minutes, a functional shape memory composite material of 100mm×100mm×1mm was finally obtained.

[0076] The transition temperature of the obtained functional shape memory composite material is 50-70°C, the shape recovery ratio is ...

Embodiment 3

[0078] The difference from Example 2 is only that 0.005 parts by mass of the ternary functional modifier is weighed, and the rest of the steps are the same, the transition temperature of the obtained functional shape memory composite material is 50-70°C, and the shape recovery ratio is 95% ~98%, the fixed ratio is 95%~97%, and the conductivity of the material is 0.61S / m.

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Abstract

The invention discloses a preparation method of a functional shape memory composite material, and the preparation method comprises: adding a functional modifier, sodium dodecyl sulfate and a soluble zinc salt into water for ultrasonic treatment, then adding an alkali and hydrazine, carrying out oil bath reaction, and carrying out centrifuging, washing and vacuum drying on a formed black dispersionliquid to obtain a ternary functional modifier; mixing a semi-crystalline crosslinkable high molecule, a solvent, a ternary functional modifier and a cross-linking agent for mixing, heating, stirringand drying, and vulcanizing the mixture in a mould to obtain the functional shape memory composite material. The invention also discloses the functional shape memory composite material prepared by the preparation method. The invention also discloses application of the functional shape memory composite material in the field of switch materials. The functional shape memory composite material is simple in preparation method, high in material stability and controllable in shape, has strong application potential as a switch material and is suitable for large-scale production and application.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a functional shape memory composite material and its preparation method and application. Background technique [0002] Functional polymer composite materials are a class of materials that are currently being studied very hotly, and have a very wide range of research and applications in the fields of aerospace, electronics, microelectronics, biomedicine, sensors and military. Moreover, the characteristics of low density, strong processability and low cost of polymer materials also promote the application and development. [0003] Generally speaking, functional polymer composite materials are widely used in functional applications such as electricity, heat, magnetism, and electromagnetic shielding. Most of the functional polymer composites are used in areas with rough contact surfaces and properties that can be maintained under complex deformation conditions. Therefor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/00C08L23/08C08K3/04C08K9/04C08K3/22C08K13/06
Inventor 刘德康赵永青郑文革余宏伟苏耀卓任倩张利华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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