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A photoinduced shape memory composite material capable of precise recovery and its preparation method

A light-induced shape memory and composite material technology, applied in the field of functional composite materials, can solve the problems of low deformation rate and low deformation recovery rate

Active Publication Date: 2020-10-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stationary phase can be a cross-linked structure of a polymer, a partially crystalline structure, a glassy state of a polymer, or entanglement of ultrapolymer chains, etc.; the reversible phase can be a partially crystalline phase that produces reversible changes in crystallization and crystallization melting, or a glassy state The phase structure of the reversible transition from the rubber state (glass transition temperature °Tg); because the material is a two-phase co-continuous structure, the existing shape memory materials generally have the disadvantages of low deformation rate and low deformation recovery rate.

Method used

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  • A photoinduced shape memory composite material capable of precise recovery and its preparation method
  • A photoinduced shape memory composite material capable of precise recovery and its preparation method
  • A photoinduced shape memory composite material capable of precise recovery and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Preparation of sulfonated carbon nanotubes (S-CNT): the suspension obtained after ultrasonication of carbon nanotube (0.25wt%) aqueous solution for 1h was added dropwise to the same volume of p-benzenesulfonic acid (0.46wt%) and super In the hydrochloric acid solution (0.15wt%) of potassium sulfate (0.18wt%), carry out sulfonation under the condition of ice-water bath for 4h, then wash with distilled water and dry;

[0042] (2) Preparation of PU / S-CNT solution: S-CNT DMF solution (0.15wt%) was ultrasonically dispersed for 1 h, then added to the same volume of PU DMF solution (15wt%) and mixed at 80°C for 15 minutes;

[0043] (3) Flocculation of PU / S-CNT composites: Pour the above solution into distilled water and keep stirring to obtain PU / S-CNT flocs, which are washed with distilled water and then dried;

[0044] (4) Preparation of HDPE / PU / S-CNT composite pellets: after crushing the dried PU / S-CNT composite, twin-screw extrusion and granulation with HDPE pellets to...

Embodiment 2

[0048] (1) Preparation of sulfonated carbon nanotubes: The suspension obtained after ultrasonication of carbon nanotube (0.25wt%) aqueous solution for 1h was added dropwise to the same volume containing p-benzenesulfonic acid (0.46wt%) and potassium persulfate (0.18wt%) %) in hydrochloric acid solution (0.15wt%), carry out sulfonation 4h under the condition of ice-water bath, then wash and dry with distilled water;

[0049] (2) Preparation of PU / S-CNT solution: ultrasonically disperse the DMF solution (0.15wt%) of S-CNT for 1 hour, then add it to the same volume of 80°C PU in DMF solution (15wt%) and mix for 15 minutes;

[0050] (3) Flocculation of PU / S-CNT composites: Pour the above solution into distilled water and keep stirring to obtain PU / S-CNT flocs, which are washed with distilled water and then dried;

[0051] (4) Preparation of HDPE / PU / S-CNT composite pellets: after crushing the dried PU / S-CNT composite, twin-screw extrusion and granulation with HDPE pellets to contro...

Embodiment 3

[0055] (1) Preparation of sulfonated carbon nanotubes: The suspension obtained after ultrasonication of carbon nanotube (0.25wt%) aqueous solution for 1h was added dropwise to the same volume containing p-benzenesulfonic acid (0.46wt%) and potassium persulfate (0.18wt%) %) in hydrochloric acid solution (0.15wt%), carry out sulfonation 4h under the condition of ice-water bath, then wash and dry with distilled water;

[0056] (2) Preparation of PU / S-CNT solution: ultrasonically disperse the DMF solution (0.15wt%) of S-CNT for 1 hour, then add it to the same volume of 80°C PU in DMF solution (15wt%) and mix for 15 minutes;

[0057] (3) Flocculation of PU / S-CNT composites: Pour the above solution into distilled water and keep stirring to obtain PU / S-CNT flocs, which are washed with distilled water and then dried;

[0058] (4) Preparation of HDPE / PU / S-CNT composite pellets: after crushing the dried PU / S-CNT composite, twin-screw extrusion and granulation with HDPE pellets to contro...

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Abstract

The invention relates to a preparation method of an infrared response shape memory polymer capable of accurate recovery, and belongs to the field of functional composite materials. The invention provides a photo-induced shape memory composite material, the composite material includes a polymer matrix, a polymer elastomer dispersed phase and photothermal particles, wherein the photothermal particles are distributed in the polymer elastomer dispersed phase, and the dispersed phase distribution In the matrix; the disperse phase of the photoinduced shape memory composite material acts as a stress concentration point during deformation, so that it can form a porous structure that enables the composite material to function as a photoinduced shape memory composite material. The memory material obtained by the invention has good photoresponsivity, can be recovered by infrared light, and has excellent recovery accuracy and integrity, and this property has a high repetition rate.

Description

technical field [0001] The invention relates to a preparation method of a shape-memory polymer capable of precise recovery of infrared response, belonging to the field of functional composite materials. Background technique [0002] Shape memory materials originated very early, and one of them is shape memory polymers. , light, chemical induction, etc.) stimulation can restore its original shape of the polymer material. Due to the special shape memory properties, this kind of material is widely used in aerospace, medicine, life and other fields. [0003] Traditional shape memory polymer materials are composed of a two-phase structure, that is, a stationary phase that memorizes the initial shape and a reversible phase that can reversibly solidify and soften as the temperature changes. The stationary phase can be a cross-linked structure of a polymer, a partially crystalline structure, a glassy state of a polymer, or entanglement of ultrapolymer chains, etc.; the reversible ...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L75/04C08K9/04C08K3/04C08J3/28C08J3/24
Inventor 杨伟喻鹏包睿莹刘正英杨鸣波
Owner SICHUAN UNIV
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