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High conducting multilayer films from poly(acrylic acid) and graphite by layer‐by‐layer self‐assembly
Author(s) -
Tang Qunwei,
Li Qinghua,
Lin Jianming,
Fan Shijun,
Hu De,
Wu Jihuai
Publication year - 2010
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.20777
Subject(s) - materials science , bilayer , graphite , layer (electronics) , composite material , thermal stability , acrylic acid , layer by layer , percolation (cognitive psychology) , acrylic resin , polymer chemistry , chemical engineering , polymer , membrane , copolymer , coating , chemistry , biochemistry , neuroscience , engineering , biology
Abstract Exfoliated graphite nanoplatelets were modified by hexadecyltrimethylammonium bromide (C 16 TAB) and were used for the construction of [poly(acrylic acid)/graphite] n [(PAA/G) n ] multilayer films using a layer‐by‐layer (LBL) self‐assembly method. The film thickness was monitored using X‐ray diffraction technique; the results showed that the thickness depended on pH of PAA. Under a lower pH value such as 1.5, the average bilayer thickness was 1.5 nm. Once the pH of PAA was increased to 6.5, the bilayer thickness was around 30 nm. The C 16 TAB modified (PAA/G) n multilayer films showed high thermal stability and electrical conductivity. A percolation phenomenon occurred at bilayer number of 11, and the mechanism was discussed. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers