期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 135, 期 1, 页码 336-341出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2008.09.001
关键词
Chondroitin sulfate; PNIPAm; Hydrogel; Thermosensitive; Swelling
资金
- Ministry of Education, Science and Technology (MEST)/the Korea Science and Engineering Foundation (KOSEF) in Korea
A fast, thermoresponsive hydrogel composed of poly(N-isopropylacrylamide) (PNIPAm) and chondroitin sulfate (ChS) was synthesized using precipitation polymerization. ChS was introduced to increase the water absorption of the PNIPAm hydrogel. and the precipitation polymerization method was used to induce a porous network morphology to enhance the thermal response of the hydrogel. PNIPAm/ChS hydrogels (15:7.5 wt.%) underwent a very fast deswelling, within a period of approximately 2 min, due to the presence of a large free water content (similar to 90-94%), which was associated with the interconnected filamentous morphology within the hydrogel. The swelling ratio was greatly enhanced by the addition of ChS. The hydrogels exhibited stable thermoactuation behavior, following a volume change of 75% while cycling the temperature between 20 and 45 degrees C. (C) 2008 Elsevier B.V. All rights reserved.
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