TY - JOUR
T1 - Surface characterization, microstructure, and wetting of networks from α,ω-dihydroxy(polydimethylsiloxane) and 1,1,2,2-tetrahydrotridecafluoro octyltriethoxysilane
AU - Uilk, Janelle
AU - Johnston, Erika E.
AU - Bullock, Steve
AU - Wynne, Kenneth J.
PY - 2002/7/29
Y1 - 2002/7/29
N2 - Surface-modified siloxane networks were prepared using the dibutyltin diacetate catalyzed reaction of α,ω)-dihydroxy(polydimethylsiloxane), HO(Me2SiO)nH, with tridecafluoro-1,1,2,2-tetrahydrooctyl triethoxysilane, [CF3(CF2)5(CH2)2 Si(OC2H5)3, FTEOS]. Surface characterization of these elastomers was carried out using electron spectroscopy for chemical analysis (ESCA) and atomic force microscopy (AFM). Surface phase separation occurs as a function of increasing ratio of FTEOS to HO(Me2SiO)nH. Dynamic contact angle (DCA) analysis with water as the interrogating fluid showed that water contamination affects DCA data in the compositional range 4x-8x, where "x" is the ratio of ethoxy groups from FTEOS to OH groups in HO(Me2SiO)nH. Diffusion of polydimethyl siloxane oil species from coatings is blocked in compositions of 10x or greater. Chemical stability is also enhanced for 10x and 12x composisitions.
AB - Surface-modified siloxane networks were prepared using the dibutyltin diacetate catalyzed reaction of α,ω)-dihydroxy(polydimethylsiloxane), HO(Me2SiO)nH, with tridecafluoro-1,1,2,2-tetrahydrooctyl triethoxysilane, [CF3(CF2)5(CH2)2 Si(OC2H5)3, FTEOS]. Surface characterization of these elastomers was carried out using electron spectroscopy for chemical analysis (ESCA) and atomic force microscopy (AFM). Surface phase separation occurs as a function of increasing ratio of FTEOS to HO(Me2SiO)nH. Dynamic contact angle (DCA) analysis with water as the interrogating fluid showed that water contamination affects DCA data in the compositional range 4x-8x, where "x" is the ratio of ethoxy groups from FTEOS to OH groups in HO(Me2SiO)nH. Diffusion of polydimethyl siloxane oil species from coatings is blocked in compositions of 10x or greater. Chemical stability is also enhanced for 10x and 12x composisitions.
KW - Atomic force microscopy (AFM)
KW - Dynamic contact angle
KW - Fluorinated alkylsiloxane
KW - Polysiloxanes
KW - Wetting
UR - https://www.scopus.com/pages/publications/0037194046
U2 - 10.1002/1521-3935(200207)203:10/11<1506::AID-MACP1506>3.0.CO;2-V
DO - 10.1002/1521-3935(200207)203:10/11<1506::AID-MACP1506>3.0.CO;2-V
M3 - Article
AN - SCOPUS:0037194046
SN - 1022-1352
VL - 203
SP - 1506
EP - 1511
JO - Macromolecular Chemistry and Physics
JF - Macromolecular Chemistry and Physics
IS - 10-11
ER -