Observation of collapse and swelling of thermosensitive poly(N-isopropylacrylamide) brashes grafted on SiO2

Chie Yahiro, Annaka Masahiko, Motoyasu Kobayashi, Atsushi Takahara, Akihiko Kikuchi, Teruo Okano

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Thermosensitve poly(N-isopropylacrylamide) (PNIPAM) brushes grafted onto SiO2-coated quartz crystal or glass surface were prepared with a surface-immobilized initiator. The microstructure of PNIPAM layer was examined by XPS, and AFM. Using QCM, we investigated the collapse and swelling of the brushes in water in real time. Frequency of PNIPAM brushes were found to gradually change throughout a temperature range 20-40°C, indicating that the PNIPAM brushes undergo a continuous transition. The nonuniformity and stretching of PNIPAM brushes as well as the cooperativity between collapse and dehydration transitions are thought to be responsible for the continuity.

Original languageEnglish
Title of host publicationPolymer Preprints, Japan - 55th SPSJ Annual Meeting
Pages1022
Number of pages1
Volume55
Edition1
Publication statusPublished - 2006
Event55th SPSJ Annual Meeting - Nagoya, Japan
Duration: May 24 2006May 26 2006

Other

Other55th SPSJ Annual Meeting
CountryJapan
CityNagoya
Period5/24/065/26/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Yahiro, C., Masahiko, A., Kobayashi, M., Takahara, A., Kikuchi, A., & Okano, T. (2006). Observation of collapse and swelling of thermosensitive poly(N-isopropylacrylamide) brashes grafted on SiO2. In Polymer Preprints, Japan - 55th SPSJ Annual Meeting (1 ed., Vol. 55, pp. 1022)