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Shape memory polymer structure capable of selectively responding and preparation method thereof

A memory polymer, an optional technology, applied in manufacturing, additive processing, etc., can solve the problems of limited processing methods and cumbersome procedures, and achieve the effect of broadening manufacturing methods, reducing manufacturing costs, and shortening manufacturing cycles

Active Publication Date: 2021-03-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the present invention provides a selectively responsive shape-memory polymer structure and its preparation method, which solves the cumbersome procedures caused by the existing preparation of shape-memory composite structures by means of blending, Problems such as limited processing methods

Method used

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  • Shape memory polymer structure capable of selectively responding and preparation method thereof
  • Shape memory polymer structure capable of selectively responding and preparation method thereof
  • Shape memory polymer structure capable of selectively responding and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0031] The preparation method of the selectively responsive shape memory polymer structure of the present invention comprises the following steps:

[0032] using a 3D printing device to print a body structure with several cavities with a shape memory polymer;

[0033] Weigh a certain mass of nanoparticles and add them to silicone oil, water and other solvents for stirring to make a certain concentration of particle solution; fill the cavity of the body structure with nanoparticle solution, and use AB glue to seal after injection. The nanoparticle solution can generate heat under external excitation;

[0034] The bulk structure filled with nanoparticle solution is heated, and the bulk structure is deformed by external force; the deformed bulk structure is cooled and shaped, and the shaped bulk structure can be restored to the bulk structure before external force deformation under the action of external excitation.

[0035] The nanoparticle solution added in the present inventi...

Embodiment 1

[0040] Use 80% epoxy soybean oil acrylate + 20% methacrylic acid to prepare a shape memory polymer, and use an LCD light-curing printer to print a rectangular groove with an outer cross-sectional size of 10×2.5mm 2 , the cross-sectional size of the groove is 8×2mm 2 , the body length is 50mm. Use absolute ethanol to clean the uncured resin inside and outside the sample, and use AB glue to seal one end of the groove after cleaning;

[0041] Nano-Fe with a mass fraction of 30% 3 o 4 Add simethicone oil and ultrasonically disperse for 20 minutes, inject the mixed particle liquid into the sample from the unsealed end of the channel, and seal it with AB glue after the injection is completed. Nano Fe 3 o4 Under the action of an alternating magnetic field, a relaxation phenomenon occurs to generate heat, which can endow the sample with additional magnetic responsiveness.

[0042] Use hot water to heat the body, apply an external force to bend it, put it in cold water for 5 minut...

Embodiment 2

[0043] Example 2, such as figure 1 Shown:

[0044] Use 80% epoxy soybean oil acrylate + 20% methacrylic acid to prepare shape memory polymer, and use LCD light curing printer to print a rectangular groove with a size of 10×2.5×50mm 3 , the rectangular piece has two through slots along the length direction, and the cross-sectional size of the through slots is 20×2mm 2 . Use absolute ethanol to clean the uncured resin inside and outside the sample, and use AB glue to seal one end of the groove after cleaning;

[0045] Configure Fe with mass fractions of 30% and 40% respectively 3 o 4 and simethicone dispersion, inject them into the two channels respectively, and seal them with AB glue after the injection is completed. Nano Fe 3 o 4 The speed and size of the heat generated under the action of the alternating magnetic field are related to the content of the particles. The more the particle content, the faster the heat generation and the higher the temperature.

[0046] Use...

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Abstract

The invention provides a shape memory polymer structure capable of selectively responding and a preparation method thereof. The preparation method comprises the following steps: preparing a body structure with a plurality of cavities by using a shape memory polymer; filling the cavity of the body structure with a nanoparticle solution, wherein the nanoparticle solution can generate heat under theaction of external excitation; heating the body structure filled with the nanoparticle solution, and deforming the body structure through external force; and cooling and shaping the deformed body structure, and restoring the shaped body structure to the body structure before external force deformation under the action of external excitation. Various types of particle liquids with different concentrations are selectively injected into the cavity, so that the structure is endowed with various excitation modes, sequence controllable response capability and capability of selectively responding tovarious external stimuli.

Description

technical field [0001] The invention relates to the field of preparation of shape memory materials, in particular to a selectively responsive shape memory polymer structure and a preparation method thereof. Background technique [0002] Shape memory polymer (SMP) is an excellent stimuli-responsive material with the ability to recover from a temporary shape to a permanent shape after the application of external stimuli, and its shape memory effect can be stimulated by direct heating, magnetic field, electricity, light and water, etc. to trigger. Shape memory polymers are currently used in various fields, such as spatially deployable structures, joint muscles, smart actuators, minimally invasive surgical sutures, tissue engineering scaffolds, mobile assembly / disassembly, and textiles, etc. [0003] Most of the existing shape memory polymers can only respond to a single external excitation method, and cannot use multiple excitation methods for selective and controllable shape ...

Claims

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Application Information

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IPC IPC(8): C08L51/00C08L83/04C08K3/04C08K3/22C08F289/00C08F220/06B33Y70/00B33Y80/00B29C61/06B29C64/10B29C69/02
CPCC08L51/00C08F289/00C08F220/06B33Y70/00B33Y80/00B29C69/02B29C64/10B29C61/06C08K2201/011C08K2003/2275C08L2201/12C08K2201/01C08L83/04C08K3/041C08K3/22
Inventor 黄舒单铭远张航盛杰魏洁安周建忠周双流徐玮
Owner JIANGSU UNIV
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