Construction and Characterization of Molecular Nonwoven Fabrics Consisting of Cross-Linked Poly(纬-methyl-l-glutamate)
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- 作者：Rintaro Higuchi ; Megumi Hirano ; Md. Ashaduzzaman ; Neval Yilmaz ; Tatsunori Sumino ; Daisuke Kodama ; Sayuri Chiba ; Shinobu Uemura ; Katsuhiko Nishiyama ; Akihiro Ohira ; Michiya Fujiki ; Masashi Kunitake
- 刊名：Langmuir
- 出版年：2013
- 出版时间：June 18, 2013
- 年：2013
- 卷：29
- 期：24
- 页码：7478-7487
- 全文大小：763K
- 年卷期：v.29,no.24(June 18, 2013)
- ISSN：1520-5827
文摘
Molecular nonwoven fabrics in the form of ultrathin layer-by-layer (LbL) helical polymer films with covalent cross-linking were assembled on substrates by an alternate ester鈥揳mide exchange reaction between poly(纬-methyl l-glutamate) (PMLG) and cross-linking agent ethylene diamine or 4,4鈥?diamino azobenzene. The regular growth of helical monolayers without excessive adsorption and the formation of amide bonds were confirmed by ultraviolet鈥搗isible (UV鈥搗is) spectrophotometry, quartz crystal microbalance (QCM), ellipsometry, and infrared reflection鈥揳bsorption spectroscopy (IR-RAS) measurements. Nanostructures with high uniformity and ultrathin films with few defects formed by helical rod segments of PMLG were characterized by atomic force microscopy (AFM) and Kelvin probe force microscopy (KFM).