On the Interfacial Behavior of Catenated Poly(l -lactide) at the Air-Water Interface

Li Han Rong, Xiang Cheng, Jin Ge, Hanyu Wang, Peng Fei Cao, Eugene B. Caldona, Rigoberto C. Advincula

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)9751-9759
Number of pages9
JournalLangmuir
Volume38
Issue number32
DOIs
StatePublished - Aug 16 2022

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