等压法
聚合物
材料科学
表面压力
化学工程
丙交酯
朗缪尔
纤维
高分子
高分子化学
化学
复合材料
聚合
物理化学
吸附
热力学
物理
机械
工程类
生物化学
作者
Lihan Rong,Xiang Cheng,Jin Ge,Hanyu Wang,Peng-Fei Cao,Eugene B. Caldona,Rigoberto C. Advincula
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-08-03
卷期号:38 (32): 9751-9759
被引量:1
标识
DOI:10.1021/acs.langmuir.2c00454
摘要
Interfacial properties of polymeric materials are significantly influenced by their architectural structures and spatial features, while such a study of topologically interesting macromolecules is rarely reported. In this work, we reported, for the first time, the interfacial behavior of catenated poly(l-lactide) (C-PLA) at the air-water interface and compared it with its linear analogue (L-PLA). The isotherms of surface pressure-area per repeating unit showed significant interfacial behavioral differences between the two polymers with different topologies. Isobaric creep experiments and compression-expansion cycles also showed that C-PLA demonstrated higher stability at the air-water interface. Interestingly, when the films at different surface pressures were transferred via the Langmuir-Blodgett method, successive atomic force microscopy imaging displayed distinct nanomorphologies, in which the surface of C-PLA exhibited nanofibrous structures, while that of the L-PLA revealed a smoother topology with less fiber-like structures.
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