Premium
Formation and Properties of Responsive Siloxane‐Based Polymeric Surfaces with Tunable Surface Reconstruction Kinetics
Author(s) -
CroweWilloughby Julie Ann,
Genzer Jan
Publication year - 2009
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200800622
Subject(s) - siloxane , materials science , moiety , kinetics , van der waals force , methylene , melting point , polymer chemistry , chemical engineering , composite material , polymer , molecule , stereochemistry , organic chemistry , chemistry , physics , quantum mechanics , engineering
Here, the formation of responsive polymeric materials with tunable response time is reported. These structures are fabricated by chemically modifying poly(vinylmethyl siloxane) (PVMS) networks with alkanethiols bearing a hydrophilic end‐group (COOH or OH). The response time is facilitated by the liquid nature of the PVMS backbone and increases with increase in length of the methylene spacer (CH 2 ) n in the alkanethiol pendent group. While for n = 2 and 6, the surface reconstructs almost instantaneously, specimens with n = 11 resist reconstruction because of strong van der Waals forces, leading to the formation of semi‐crystalline regions. It is demonstrated that the responsive nature of PVMSS(CH 2 ) 11 OH can be fine‐tuned by varying the temperature; it possesses a faster response at temperatures above the melting point of the S(CH 2 ) 11 OH moiety.