期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 112, 期 33, 页码 10137-10141出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp801533r
关键词
-
资金
- National Distinguished Young Investigator Fund [20725414]
- Ministry of Science and Technology of China [2007CB936401]
Poly(acrylic acid) (PAA) chains exhibit conformational change in response to pH, whereas bromate-sulfite-ferrocyanide (BSF) solution shows pH oscillation between 3.2 and 6.6. By use of quartz crystal microbalance with dissipation (QCM-D), we have investigated the pH induced conformational change of PAA brushes under a continuous flow of BSF solution in real time. The changes in frequency and dissipation clearly indicate the periodic swelling and collapse of brushes with pH oscillation. The changes in thickness, viscosity, and elastic modulus further indicate the oscillation of the interface.
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