Construction and Characterization of “Molecular Nonwoven Fabrics” Consisting of Crosslinked Poly(γ-Methyl-L-Glutamate)"
Construction and Characterization of “Molecular Nonwoven Fabrics” Consisting of Crosslinked Poly(γ-Methyl-L-Glutamate)"
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交联聚(γ-甲基-L-谷氨酸)“分子非织造布”的构建与表征
作者：
R. Higuchi;M. Hirano;Md. Ashaduzzaman;N. Yilmaz;T. Sumino;D. Kodama;S. Chiba;S. Uemura;K. Nishiyama;A. Ohira;M. Fujiki;M. Kunitake
以乙二胺或4，4 ′-二氨基偶氮苯为交联剂，通过聚谷氨酸γ-甲酯（PMLG）的酯-酰胺交替交换反应，将分子非织造布组装成共价交联的多层螺旋聚合物膜。通过紫外-可见分光光度法、石英晶体微天平（QCM）、椭圆偏振法和红外反射-吸收光谱（IR-RAS）测量证实了螺旋单分子膜的规则生长而没有过度吸附和酰胺键的形成。利用原子力显微镜（AFM）和开尔文探针力显微镜（KFM）对PMLG的螺旋棒段形成的均匀性高的纳米结构和缺陷少的纳米薄膜进行了表征。
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–amide exchange reaction between poly(γ-methyll-glutamate) (PMLG) and cross-linking agent ethylene diamine or 4,4′-diamino azobenzene. The regular growth of helical monolayers without excessive adsorption and the formation of amide bonds were confirmed by ultraviolet–visible (UV–vis) spectrophotometry, quartz crystal microbalance (QCM), ellipsometry, and infrared reflection–absorption 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).