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Physical hydrogel and preparation method thereof

A physical water and gel technology, applied in the field of chemical materials, can solve problems such as insufficient self-healing ability of hydrogels, and achieve the effects of large-scale preparation, elimination of hydrogel performance degradation, and simple operation.

Inactive Publication Date: 2020-01-07
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a physical hydrogel and its preparation method to solve the technical problem of insufficient self-healing ability of hydrogel in the prior art

Method used

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  • Physical hydrogel and preparation method thereof

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preparation example Construction

[0034] The preparation method of the physical hydrogel of the present invention includes the following steps:

[0035] Calculated by mole fractions, 1-30 parts of monomer A, 1-30 parts of monomer B and 60-98 parts of monomer C are thoroughly mixed to obtain the mixture, which is then initiated by light, thermal, radiation or redox Allowing the mixture to undergo a radical polymerization reaction to obtain a precursor;

[0036] During the formation of the precursor, the chemical reaction is as follows:

[0037]

[0038] The precursor is soaked in water for 1-120 hours to form the physical hydrogel.

[0039] Precursors are amphiphilic substances, but due to their high molecular weight, the intermolecular hydrophobic segments will reshot to form physical cross-linking points, so they are different from small-molecule amphiphilic compounds. They are not soluble in water and can only swell to form hydrophobic Associate hydrogel.

[0040] See Figure 1-4 ,in Figure 1-2 In, through the inf...

Embodiment 1

[0044] Mix 40 millimoles of acrylic acid, 40 millimoles of dimethylaminoethyl acrylate, 120 millimoles of butyl acrylate and 1 millimolar of photoinitiator (I2959) and pour them into a polypropylene mold. Irradiate under ultraviolet light for 1 hour to obtain a copolymer precursor. Then, the precursor was put into deionized water and soaked for 48 hours to obtain a physical hydrogel.

Embodiment 2

[0046] Mix 40 millimoles of methacrylic acid, 40 millimoles of dimethylaminoethyl methacrylate, 80 millimoles of hexyl acrylate and 1 millimolar of thermal initiator (AIBN) and pour into polypropylene airtightly. The mold was put into an oven and heated at 80 degrees for 12 hours to obtain a copolymer precursor. Then, the precursor was put into deionized water and soaked for 48 hours to obtain a physical hydrogel.

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Abstract

The invention relates to a physical hydrogel and a preparation method thereof. The physical hydrogel comprises the following components in parts by mole: 1-30 parts of a monomer A which is acrylic acid or methacrylic acid, 1-30 parts of a monomer B which is dimethylaminoethyl acrylate or dimethylaminoethyl methacrylate, and 40-98 parts of a monomer C which is alkyl acrylate and a mixture thereof,wherein an alkyl chain is any one of C1-C30. The main components of the physical hydrogel are acrylic acid, dimethylaminoethyl acrylate and alkyl acrylate, so that the use of a surfactant is avoided,and the stability of the hydrophobically associated physical hydrogel is fundamentally improved. The method is simple to operate, and large-scale preparation of the hydrophobically associated physicalhydrogel can be realized.

Description

Technical field [0001] The invention belongs to the technical field of chemical materials, and particularly relates to physical hydrogels and a preparation method thereof. Background technique [0002] At present, high-performance hydrogels have been widely used in wearable electronic devices, flexible devices, actuators, tissue engineering and other fields. Traditional hydrogels are mainly formed by cross-linking of chemical bonds. Such chemical hydrogels cannot effectively dissipate energy during the deformation process, resulting in poor mechanical properties, which have been difficult to meet the requirements in the above-mentioned fields. Physical hydrogels are mainly formed through non-covalent bond interactions, including host-guest interactions, hydrophobic associations, hydrogen bonding and electrostatic interactions. When deforming and recovering, physical hydrogels can dissipate energy effectively through non-covalent dissociation / association and hysteresis, thus exhi...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/06C08F220/34C08J3/075C09J133/08B01J13/00B01J20/26B01J20/28B01J20/30
CPCB01J13/0065B01J20/261B01J20/28047C08F220/18C08J3/075C08J2333/08C09J133/08
Inventor 陈少军陈恒
Owner SHENZHEN UNIV