Fabrication and Properties of Thermosensitive Organic/Inorganic Hybrid Hydrogel Thin Films

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• 作者：Zheng Cao ; Binyang Du ; Tianyou Chen ; Haotian Li ; Junting Xu ; Zhiqian Fan
• 刊名：Langmuir
• 出版年：2008
• 出版时间：May 20, 2008
• 年：2008
• 卷：24
• 期：10
• 页码：5543 - 5551
• 全文大小：951K
• 年卷期：v.24,no.10(May 20, 2008)
• ISSN：1520-5827

文摘

We report on a facile method for fabricating thermosensitive organic/inorganic hybrid hydrogel thin films from a cross-linkable organic/inorganic hydrid copolymer, poly[N-isopropylacrylamide-co-3-(trimethoxysilyl)propylmethacrylate] [P(NIPAm-co-TMSPMA)]. Fourier transform infrared (FT-IR) spectra confirmed the formation of hybrid hydrogel thin films after hydrolysis of the methoxysilyl groups (Si−O−CH₃) and subsequent condensation of the silanol groups (Si−OH). Atomic force microscopy (AFM) images revealed that the surface morphology of the hydrogel thin films depended on the supporting substrates. Microdomains were observed for the hydrogel thin films on a gold surface, which can be attributed to inhomogeneous network structures. The thermoresponsive swelling−deswelling behavior and the viscoelastic properties of the hydrogel thin films were investigated as a function of temperature (25–45 °C) by using a quartz crystal microbalance (QCM) operated in water. The high frequency shear modulus of the P(NIPAm-co-TMPSMA) hydrogel thin films was several hundred kilopascals.