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Self-healing organic/inorganic nanoparticle hybrid material and preparation method thereof

A technology of inorganic nanoparticles and hybrid materials, which is applied in the field of organic-inorganic hybrid materials and its preparation, can solve problems such as poor mechanical strength, and achieve the effect of strong self-healing recovery ability

Inactive Publication Date: 2017-05-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the self-healing materials for non-covalent bond repair are often hydrogels, which have poor mechanical strength and are greatly limited in application.

Method used

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  • Self-healing organic/inorganic nanoparticle hybrid material and preparation method thereof
  • Self-healing organic/inorganic nanoparticle hybrid material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve adamantyl acrylate in DMSO solution (concentration: 8%), and β-cyclodextrin-modified ferroferromagnetic particles are dispersed in water (concentration: 2%). Then the two were mixed (the molar ratio of adamantane to β-cyclodextrin was 1:1) and stirred for 5 hours, and the adamantyl acrylate not involved in the assembly was removed by centrifugation. The assembled adamantyl acrylate / β-cyclodextrin-ferric iron tetroxide and butyl acrylate in a weight ratio of 1:5, using tetrahydrofuran as a solvent, AIBN as an initiator, ethylene glycol dimethacrylate (EGDMA ) is a cross-linking agent for copolymerization and cross-linking, and the reaction time is 12 hours. After the reaction is completed, the solvent is removed by vacuum drying for 40 hours, and the polyacrylic acid-adamantane / β-cyclodextrin-ferric oxide material can be obtained.

[0025]The polyacrylate / β-cyclodextrin-ferric oxide was cut in half, and then the cross-section was gently closed. After 0.5 hours,...

Embodiment 2

[0027] Vinyl azobenzoate was dissolved in DMSO solution (concentration: 3%), and α-cyclodextrin-modified graphene was dispersed in water (concentration: 5%). Then the two were mixed (the molar ratio of azobenzene to α-cyclodextrin was 1:1) and stirred for 3 hours, then centrifuged to remove vinyl azobenzoate that did not participate in the assembly. The assembled vinyl azobenzoate / α-cyclodextrin-graphene and hydroxyethyl acrylate are in a weight ratio of 1:3, using tetrahydrofuran as a solvent, AIBN as an initiator, and ethylene glycol dimethacrylate ( EGDMA) is cross-linking agent, carries out copolymerization and cross-linking, and the reaction time is 15 hours. After the reaction is completed, the solvent is removed by vacuum drying for 40 hours to obtain a polyacrylate-polyvinyl azobenzoate / α-cyclodextrin-graphene material.

[0028] The polyacrylate-polyvinyl azobenzoate / α-cyclodextrin-graphene was cut in half, and then the cross-section was gently closed. After 1 hour, t...

Embodiment 3

[0030] Ferrocene-modified sodium alginate (substitution degree: 8%) was dissolved in aqueous solution (concentration: 5%), and β-cyclodextrin-modified graphene was dispersed in water (concentration: 5%). Then the two were mixed (the molar ratio of ferrocene to β-cyclodextrin was 0.4:1) and stirred for 10 hours, then dialyzed for 48 hours to remove sodium alginate not involved in assembly. Concentrate the above-mentioned liquid after dialysis to remove most of the water, and then add 10% calcium chloride as a physical cross-linking agent to obtain sodium alginate-ferrocene / β-cyclodextrin-graphene gel.

[0031] The sodium alginate-ferrocene / graphene-β-cyclodextrin was cut in half, and then the cross-section was gently closed. After 5 hours, the material healed. The tensile strength after healing was 69% of the original strength. Self-healing can be repeated many times (cut and heal more than 3 times at the same site, and the tensile strength after healing is more than 50% of th...

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Abstract

The invention discloses a self-healing organic matter / inorganic nanoparticle hybrid material and a preparation method thereof. The basic contents are as follows: the organic matters and nanoparticles in the hybrid material are respectively modified by the host group and guest group and are connected together under the inclusion acting force of the host and guest. After the material is damaged, the damaged interface can generate abundant free host and guest groups, and the strong inclusion interacting force between the host and guest groups can promote the healing restoration of the material. Abundant inorganic nanoparticles are introduced into the system under the inclusion action of the host and guest, and the uniformly dispersed nanoparticles can generate an enhancement effect on the material to improve the mechanical strength of the material. The hybrid self-healing material disclosed by the invention has wide application prospects in the fields of bionics, biomedicine, electronics, daily chemical industry, even military affairs, national defense and the like.

Description

technical field [0001] The invention relates to the field of intelligent materials, in particular to an organic-inorganic hybrid material capable of self-repair and healing and a preparation method thereof. Background technique [0002] Self-healing is a kind of body repair ability that is ubiquitous in the biological world. From DNA repair at the molecular level to skin and bone wound healing at the macro level, the materials that constitute organisms have demonstrated outstanding self-healing capabilities after trauma. In recent years, the research on simulating the self-healing function of organisms and designing and preparing synthetic self-healing materials (self-healing materials in a narrow sense refers to a class of materials that can repair damage by themselves without external conditions) has gradually emerged. (Chinese Science: Chemistry, 2012, 42, 741-756; Polym Chem, 2010, 1,978-987; Prog Polym Sci, 2013, 38, 1961-1977.) Since self-healing materials can greatly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/08C08L33/14C08K9/08C08K3/22C08K3/04C08F220/18C08F220/28C08L5/04C08L5/16C08L79/02C08L5/08C08K3/30C08L51/02C08K9/04C08K3/08C08F290/10C08K5/092C08J3/24
Inventor 张晟郭坤李帮经
Owner SICHUAN UNIV
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