Solvent-dependent properties of poly(vinylidene fluoride) monolayers at the air-water interface

Huie Zhu, Jun Matsui, Shunsuke Yamamoto, Tokuji Miyashita, Masaya Mitsuishi

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


The present work addresses the solvent-dependent properties of Langmuir films of poly(vinylidene fluoride) (PVDF) and amphiphilic poly(N-dodecylacrylamide) (pDDA) at different mixing ratios. After introducing pDDA nanosheets, PVDF Langmuir films obtain a tremendously enhanced modulus as well as high transfer ratios using the vertical dipping method caused by the support of the pDDA two-dimensional hydrogen bonding network. Brewster angle microscopy (BAM) was used to investigate PVDF monolayers at the air-water interface in situ. Spreading from different solvents, the PVDF molecules take completely different aggregation states at the air-water interface. The PVDF molecules aggregate to become large domains when spread from N-methyl-2-pyrrolidone (NMP). However, the volatile and low-polarity methylethyl ketone (MEK) made the PVDF molecules more dispersive on the water surface. This study also discovers a versatile crystallization control of PVDF homopolymer from complete β phase (NMP) to complete α phase (MEK) at the air-water interface, thereby eliciting useful information for further manipulation of film morphologies and film applications.

Original languageEnglish
Pages (from-to)1962-1972
Number of pages11
JournalSoft Matter
Issue number10
Publication statusPublished - 2015 Mar 14


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