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Preparation method of temperature-sensitive hydrogel

A temperature-sensitive hydrogel and photoinitiator technology, which is applied in the field of polymer materials, can solve the problems of limited development prospects and low mechanical strength of PNIPPAM hydrogels, and achieves simple and efficient preparation process, excellent mechanical strength, and good biocompatibility. Effect

Active Publication Date: 2021-08-31
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low mechanical strength of PNIPPAM hydrogel limits its development prospects.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 10g 8% PVA-SbQ solution, add 0.23g 3.45% CNC suspension, 0.3g NIPPAM and 0.009g photoinitiator to it, stir for 1 hour, let it stand for 0.5 hour, after the bubbles are completely eliminated, pour it into the local In a surface glass with different light transmittance (for example, the words "Material Youth" are written on a conventional surface glass through a dark pigment), put 40W / cm 2 Irradiated under ultraviolet light for 6 minutes to obtain PVA-SbQ / NIPPAM / CNC thermosensitive hydrogel, denoted as PVA-SbQ / NIPPAM / CNC-1, the tensile strength test results can be found in figure 1 .

[0032] Through the temperature sensitivity test, the temperature sensitivity test result figure of the PVA-SbQ / NIPPAM / CNC composite hydrogel prepared in Example 1 of the present invention can be found in figure 2 . Before adding hot water, the surface of the beaker with the temperature-sensitive hydrogel was colorless and transparent; after adding hot water, the surface of the beake...

Embodiment 2

[0034] Take 10g 8% PVA-SbQ solution, add 0.46g 3.45% CNC suspension, 0.3g NIPPAM and 0.009g photoinitiator to it, stir for 1 hour, let it stand for 0.5 hour, after the bubbles are completely eliminated, pour it into the local In the watch glass with different light transmittance, put it at 40W / cm 2After irradiating with ultraviolet light for 6 minutes, the PVA-SbQ / NIPPAM / CNC thermosensitive hydrogel was obtained, which was denoted as PVA-SbQ / NIPPAM / CNC-2.

Embodiment 3

[0036] Take 10g 8% PVA-SbQ solution, add 0.69g 3.45% CNC suspension, 0.3g NIPPAM and 0.009g photoinitiator to it, stir for 1 hour, let it stand for 0.5 hour, after the bubbles are completely eliminated, pour it into the local In the watch glass with different light transmittance, put it at 40W / cm 2 After irradiating under ultraviolet light for 6 minutes, the PVA-SbQ / NIPPAM / CNC thermosensitive hydrogel was obtained, which was denoted as PVA-SbQ / NIPPAM / CNC-3.

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Abstract

The invention relates to a preparation method of temperature-sensitive hydrogel, and belongs to the technical field of high polymer materials. According to the invention, a blending method is utilized, and the temperature-sensitive composite hydrogel is prepared from NIPPAM, PVA-SbQ, CNC and a photoinitiator under the action of ultraviolet light. Compared with temperature-sensitive hydrogel prepared by thermal initiation, the preparation process is simpler and more efficient; in addition, the temperature-sensitive hydrogel with different temperature sensitivities can be prepared by adjusting different local light transmittances; meanwhile, due to the addition of CNC, compared with PNIPPAM hydrogel, the mechanical property of the hydrogel is more excellent.

Description

technical field [0001] The invention relates to a method for preparing a temperature-sensitive hydrogel, which belongs to the technical field of polymer materials. Background technique [0002] Hydrogel is a kind of hydrophilic but water-insoluble polymer with three-dimensional network structure formed by physical or chemical action. According to its source, hydrogels can be divided into natural hydrogels and traditional hydrogels; according to the response to external stimuli, hydrogels can be divided into traditional hydrogels and environment-sensitive hydrogels. Among them, environmentally sensitive hydrogels can be further divided into hydrogels sensitive to pH, light, electricity, temperature, etc. Compared with traditional hydrogels, environment-sensitive hydrogels are sensitive to environmental changes, resulting in corresponding changes in physical structure and chemical properties, and have broad application prospects in various fields. As a kind of environment-se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F261/04C08F251/02C08F220/54C08F2/48
CPCC08F261/04C08F251/02C08F2/48C08F220/54
Inventor 白绘宇俞诚李杰王健邬智翔汪泽辉张胜文东为富
Owner JIANGNAN UNIV
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