摘要
用不同分子量的聚乳酸共混改性丝素，研究结果表明，与纯的丝素膜相比，共混合膜的力学性能明显提高，透汽性也有所提高，但透湿性略有下降；聚乳酸的分子量对共混膜的力学性能、透湿性均有一定的影响，但对共混膜的透汽性影响不大。FTIR和XRD表征结果表明聚乳酸的加入丝素分子β构像的含量明显增多；用Vigot函数以1265和1235cm^-1为中心在1200～1300cm^-1之间对红外光谱进行了分峰，用11265／1235cm^-1来表征混合膜中8构像丝素分子的含量，结果表明比例为5／100的聚乳酸／丝素共混膜中，丝素分子β3构像含量最多，为0．64。
The polylactic-acid（PLLA） with the molecular weight were used to modify the silk fibroin（SF） film. Compared to the pure silk fibroin membrane, the breaking strength and the steam permeability of the PLLA/SF blends increased a lot, but the water permeability decreased a little. The molecular weight of PLLA had little influence on the steam permeability, but influenced the breaking strength and water permeability to some extent. The structural of the PLLA/SF were examined through Fourier transform infrared （FTIR） spectroscopy, X-ray diffractometry（XRD）. It was found the contents of β-sheet fibroin in PLLA/SF films increased a lot , according to the FTIR and XRD. We disported the apex in 1265 and 1235cm-1 between 1200 and 1300cm-1 according to Vigot function, we used the area ratio to token the β-sheet contents in the blends. We got the results that the blends with the PLLA/SF ratio 5/100 had the most contents of β-sheet fibroin , that was 0.64.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第12期2048-2051,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50573068)
教育部博士点基金项目资助(20060338001)
长江学者和创新团队发展计划资助项目(IRT0654)
关键词
聚乳酸
共混膜
丝素
改性
polylactic-acid
blends
fibroin
modification
