Thermoresponsive hydrogels based on poly(N-isopropylacrylamide)/chondroitin sulfate
- Authors
- Varghese, Justin M.; Ismail, Yahya A.; Lee, Chang Kee; Shin, Kwang Min; Shin, Min Yoon; Kim, Sun I.; So, Insuk; Kim, Seon Jeong
- Issue Date
- Dec-2008
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Chondroitin sulfate; PNIPAm; Hydrogel; Thermosensitive; Swelling
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.135, no.1, pp.336 - 341
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 135
- Number
- 1
- Start Page
- 336
- End Page
- 341
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/177634
- DOI
- 10.1016/j.snb.2008.09.001
- ISSN
- 0925-4005
- Abstract
- 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.
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