Reversible swelling-shrinking behavior of hydrogen-bonded free-standing thin film stabilized by catechol reaction

Dopamine-modified poly(acrylic acid) (PAA-dopa) and poly(vinylpyrrolidone) (PVPON) was layer-by-layer (LbL) assembled to prepare thin film based on hydrogen bonding. The carboxylic group of acrylic acid and the phenolic hydroxyl group of dopamine can both act as hydrogen bond donors. The critical as...

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Détails bibliographiques
Publié dans:Langmuir : the ACS journal of surfaces and colloids. - 1985. - 31(2015), 18 vom: 12. Mai, Seite 5147-54
Auteur principal: Sun, Jiaxing (Auteur)
Autres auteurs: Su, Chao, Zhang, Xuejian, Yin, Wenjing, Xu, Jian, Yang, Shuguang
Format: Article en ligne
Langue:English
Publié: 2015
Accès à la collection:Langmuir : the ACS journal of surfaces and colloids
Sujets:Journal Article Research Support, Non-U.S. Gov't Catechols Membranes, Artificial catechol LF3AJ089DQ
Description
Résumé:Dopamine-modified poly(acrylic acid) (PAA-dopa) and poly(vinylpyrrolidone) (PVPON) was layer-by-layer (LbL) assembled to prepare thin film based on hydrogen bonding. The carboxylic group of acrylic acid and the phenolic hydroxyl group of dopamine can both act as hydrogen bond donors. The critical assembly and the critical disintegration pH values of PVPON/PAA-dopa film are enhanced compared with PVPON/PAA film. The hydrogen-bonded PVPON/PAA-dopa thin film can be cross-linked via catechol chemistry of dopamine. After cross-linking, the film can be exfoliated from the substrate in alkaline solution to get a free-standing film. Moreover, by tuning the pH value, deprotonation and protonation of PAA will make the hydrogen bond in the film break and reconstruct, which induces that the free-standing film has a reversible swelling-shrinking behavior
Description:Date Completed 04.02.2016
Date Revised 12.05.2015
published: Print-Electronic
Citation Status MEDLINE
ISSN:1520-5827
DOI:10.1021/la5048479