Tailoring Architecture of Nanothin Hydrogels: Effect of Layering on pH-Triggered Swelling

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• 作者：Veronika Kozlovskaya ; Oleksandra Zavgorodnya ; Yun Wang ; John F. Ankner ; Eugenia Kharlampieva
• 刊名：ACS Macro Letters
• 出版年：2013
• 出版时间：March 19, 2013
• 年：2013
• 卷：2
• 期：3
• 页码：226-229
• 全文大小：295K
• 年卷期：v.2,no.3(March 19, 2013)
• ISSN：2161-1653

文摘

We have tailored the internal architecture of ultrathin poly(methacrylic acid) (PMAA) hydrogels from well stratified to highly intermixed by controlling the internal structure in layer-by-layer templates used for hydrogel fabrication. We have found pH-triggered swelling properties of these hydrogels to be significantly affected by hydrogel architecture. Well-stratified hydrogels exhibited a dramatic 10-fold increase in thickness when transitioned between pH = 5 and 7.5, unlike the 2-fold swelling observed in less-organized hydrogels.