Polyacrylic acid-based self-healing elastic material as well as preparation method and application thereof

A technology of polyacrylic acid and elastic materials, which is applied in the field of self-healing elastic materials based on polyacrylic acid and its preparation, can solve the problems of elastomers being yellowish, and achieve the effect of simple preparation steps, low cost and good self-healing performance

Inactive Publication Date: 2021-07-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is relatively simple to operate, but the coordination with metal ions needs to be carried out under weakly alkaline conditions, resulting in a yellowish phenomenon of the obtained elastomer

Method used

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  • Polyacrylic acid-based self-healing elastic material as well as preparation method and application thereof
  • Polyacrylic acid-based self-healing elastic material as well as preparation method and application thereof
  • Polyacrylic acid-based self-healing elastic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of self-healing elastomer based on polyacrylic acid, its preparation method comprises the following steps:

[0039] 1) Add 4.8 g of polyacrylic acid with a weight average molecular weight of 3000 g / mol to 13 g of water and 8 g of ethanol solution, and magnetically stir at a speed of 300 r / min for 30 minutes to obtain a polyacrylic acid dispersion;

[0040] 2) 1.5g of hydroxyethyl acrylate, 3.5g of hydroxyethyl methacrylate, 1g of methacrylic acid, 0.2g of polyethylene glycol diacrylate with a number average molecular weight of 600g / mol, 0.01g of diallyl Add the 2-hydroxy-2-methylphenylpropane-1-one of base disulfide and 0.18g into the polyacrylic acid dispersion obtained in step 1), wrap the container with tinfoil to avoid light, and then 300r / min speed magnetic stirring for 60 minutes to obtain the precursor fluid;

[0041]3) Inject the precursor liquid obtained in step 2) into a polytetrafluoroethylene mold, irradiate with a UV lamp with a wavelength of 365nm...

Embodiment 2

[0043] A kind of self-healing elastomer based on polyacrylic acid, its preparation method comprises the following steps:

[0044] 1) Add 4.8 g of polyacrylic acid with a weight average molecular weight of 3000 g / mol to 13 g of water and 8 g of ethanol solution, and magnetically stir at a speed of 300 r / min for 30 minutes to obtain a polyacrylic acid dispersion;

[0045] 2) 2g of hydroxyethyl acrylate, 3g of hydroxyethyl methacrylate, 1g of methacrylic acid, 0.2g of polyethylene glycol diacrylate with a number average molecular weight of 600g / mol, 0.03g of diallyl diacrylate Add thioether and 0.18g of 2-hydroxyl-2-methylphenylpropane-1-one into the polyacrylic acid dispersion obtained in step 1), wrap the container with tin foil to avoid light, and then 300r / min Magnetic stirring at rotating speed for 60 minutes to obtain precursor fluid;

[0046] 3) Inject the precursor liquid obtained in step 2) into a polytetrafluoroethylene mold, irradiate with a UV lamp with a wavelength ...

Embodiment 3

[0048] A kind of self-healing elastomer based on polyacrylic acid, its preparation method comprises the following steps:

[0049] 1) Add 4.8 g of polyacrylic acid with a weight average molecular weight of 3000 g / mol to 13 g of water and 8 g of ethanol solution, and magnetically stir at a speed of 300 r / min for 30 minutes to obtain a polyacrylic acid dispersion;

[0050] 2) 2.5g of hydroxyethyl acrylate, 2.5g of hydroxyethyl methacrylate, 1g of methacrylic acid, 0.2g of polyethylene glycol diacrylate with a number average molecular weight of 600g / mol, 0.05g of diallyl Add the 2-hydroxy-2-methylphenylpropane-1-one of base disulfide and 0.18g into the polyacrylic acid dispersion obtained in step 1), wrap the container with tinfoil to avoid light, and then 300r / min speed magnetic stirring for 60 minutes to obtain the precursor fluid;

[0051] 3) Inject the precursor liquid obtained in step 2) into a polytetrafluoroethylene mold, irradiate with a UV lamp with a wavelength of 365n...

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Abstract

The invention discloses a polyacrylic acid-based self-healing elastic material as well as a preparation method and application thereof. According to the olyacrylic acid-based self-healing elastic material, a copolymer formed by photopolymerization of three monomers of hydroxyethyl acrylate, hydroxyethyl methylacrylate and methacrylic acid serves as a three-dimensional network skeleton, and low-molecular-weight polyacrylic acid penetrates through a three-dimensional network to prepare the elastomer. Meanwhile, diallyl disulfide is introduced as a cross-linking agent and a modifier, a dynamic reversible disulfide bond exchange network is constructed, and the diallyl disulfide cooperates with a large number of hydrogen bonds in the system to endow the elastomer with good self-healing performance. The polyacrylic acid-based self-healing elastomer prepared by the invention has good self-healing property, certain mechanical strength and toughness and higher transparency, can be used for preparing mobile phone protective jackets, table mats, toys, entity signs and the like, and has wide application value.

Description

technical field [0001] The invention relates to the field of self-healing elastic materials, in particular to a self-healing elastic material based on polyacrylic acid and its preparation method and application. Background technique [0002] Self-healing elastic materials refer to elastic materials that can repair damage by themselves and return to approximately the original performance. The self-healing property greatly prolongs the service life of the material, which makes the material show great potential in many applications, especially in the fields of protective coatings, wearable electronic devices, and biomedicine. [0003] At present, the research on self-healing materials is mainly based on the intrinsic self-healing of materials, that is, by constructing a dynamically reversible cross-linked network, endowing elastomers with self-healing properties. These dynamic reaction types mainly include transesterification, disulfide bond exchange, imine exchange, epoxy exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/02C08F283/06C08F220/20C08F220/06C08F228/04C08F2/48
CPCC08F2/48C08F265/02C08F283/065C08F220/20C08F220/06C08F228/04
Inventor 沈慧芳杨壮刚
Owner SOUTH CHINA UNIV OF TECH
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