由分子间氢键导致的丝素构象转变的FT-IR研究

用FT－IR研究发现，在丙烯腈与丙烯酸甲酯的共聚物（PANMA）与聚L-丙氨酸（PLAL）的共混体系中，丝素（SF）与PANMA的共混体系及SF与聚丙烯酸钠（NA）的共混体系中，含有羰基或其它极性基团的高分子与SF形成强弱不等的氢键．由于氢键的形成,使SF分子不得不调整自身的构象，从而引起其构象转变．讨论了可能的分子间氢键的结构．

FT-IR Study of Conformation Transition of Silk Fibroin Induced by Intermolecular Hydrogen Bonds

FT-IR spectroscopy was used to study the conformation transition of silk fibroin in poly (acrylonitrile-co-methyl acrylate)-poly-L-alanine (PANMA-PLAL) blends, PANMA-silk fibroin(SF) blends, and poly (acrylic acid sodium) (NA)-SF blends. It was found that, in these blends, intermolecular hydrogen bonds will form between the carbonyl group of other polymers and the amide of SF. To form these hydrogen bonds, SF must change its conformation. The possible structure of the hydrogen bonds and the mechanism of the formation of the hydrogen bonds were also discussed.