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Preparation method of response-temperature-adjustable temperature sensitive hydrogel

A temperature-sensitive hydrogel and hydrogel technology, which is applied in the field of temperature-sensitive hydrogel preparation, can solve the problems of complex synthesis method and insignificant temperature response behavior of hydrogel, and achieve excellent mechanical properties, accurate and reliable performance. The effect of adjusting the response temperature and the uniformity of the three-dimensional network structure

Active Publication Date: 2013-11-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the Chinese patent CN102146200A discloses cross-linked gel particles prepared from amphiphilic block copolymers composed of polyethylene glycol / polyester, the low critical solution temperature is between 5-60°C, and the synthesis method is relatively complicated
[0004] Further, the temperature-responsive behavior of the hydrogel becomes less obvious as the content of the thermosensitive polymer in the hydrogel decreases

Method used

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  • Preparation method of response-temperature-adjustable temperature sensitive hydrogel
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  • Preparation method of response-temperature-adjustable temperature sensitive hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 1.562g 2-methyl-2-acrylic acid-2-(2-methoxyethoxy) ethyl ester, 0.438g oligoethylene glycol methyl ether methacrylate, 0.5g commercially available inorganic clay Laponite in 10g water XLS, 0.02g potassium persulfate, 0.01g N,N,N',N'-tetramethylethylenediamine to obtain a transparent hydrogel prepolymer; transfer the hydrogel prepolymer to a quartz with an optical path length of 10mm In a cuvette, react at 20°C for 24 hours to obtain a temperature-sensitive hydrogel. The result is as follows:

[0027] The response temperature of the hydrogel is 27.6°C, and the light transmittance changes with temperature as follows: figure 2 shown.

Embodiment 2

[0029] Add 1.226g 2-methyl-2-acrylic acid-2-(2-methoxyethoxy) ethyl ester, 0.774g oligoethylene glycol methyl ether methacrylate, 0.5g commercially available inorganic clay Laponite to 10g water XLS, 0.02g potassium persulfate, 0.01g N,N,N',N'-tetramethylethylenediamine to obtain a transparent hydrogel prepolymer; transfer the hydrogel prepolymer to a quartz with an optical path length of 10mm In a cuvette, react at 20°C for 24 hours to obtain a temperature-sensitive hydrogel. The result is as follows:

[0030] The response temperature of the hydrogel is 38.1°C, and the light transmittance changes with temperature as follows: image 3 shown.

Embodiment 3

[0032] Add 0.960g 2-methyl-2-acrylic acid-2-(2-methoxyethoxy) ethyl ester, 1.040g oligoethylene glycol methyl ether methacrylate, 0.5g commercially available inorganic clay Laponite in 10g water XLS, 0.02g potassium persulfate, 0.01g N,N,N',N'-tetramethylethylenediamine to obtain a transparent hydrogel prepolymer; transfer the hydrogel prepolymer to a quartz with an optical path length of 10mm In a cuvette, react at 20°C for 24 hours to obtain a temperature-sensitive hydrogel. The result is as follows:

[0033] The response temperature of the hydrogel is 45.7°C, and the light transmittance changes with temperature as follows: Figure 4 shown.

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Abstract

The invention relates to a preparation method of a response-temperature-adjustable temperature sensitive hydrogel. The method comprises a step that a hydrogel prepolymerization liquid is polymerized at 0-50DEG C for 1-48h, and the hydrogel prepolymerization liquid comprises a copolymerization monomer, a cross-linking agent, an initiator, a catalyst and deionized water. The method has the advantages of simplicity, low cost, large raw material selection range; and the prepared temperature sensitive hydrogel has the advantages of uniform three-dimensional net structure, excellent mechanical properties, and realization of accurate regulation of the response temperature in a range of 25-90DEG C, and can be widely applied in the intellectual material field.

Description

technical field [0001] The invention belongs to the field of thermosensitive hydrogel preparation, in particular to a preparation method of thermosensitive hydrogel with adjustable response temperature. Background technique [0002] Hydrogel is a soft wet material with a three-dimensional network crosslinked structure composed of hydrophilic polymers and solvent water. After absorbing a large amount of water, it can cause macroscopic changes in the polymer network. Hydrogels have the properties of a solid that cannot flow macroscopically, and have a solution-like behavior microscopically, which can swell in water but not dissolve. According to the response of polymer hydrogels to external environmental stimuli, hydrogels can be divided into traditional hydrogels and smart hydrogels. Traditional hydrogels have no response characteristics to external environmental stimuli, only have swelling behavior, and their volume does not change with the external environment. Smart hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/28C08F120/28C08F222/20C08F222/38C08K3/34
Inventor 朱美芳夏梦阁孟周琪江晓泽
Owner DONGHUA UNIV
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