TY - JOUR
T1 - Novel linear fluoro-silicon-containing pentablock copolymers
T2 - Synthesis and their properties as coating materials
AU - Liang, Junyan
AU - He, Ling
AU - Zhao, Xiang
AU - Dong, Xia
AU - Luo, Hongjie
AU - Li, Weidong
PY - 2011/5/21
Y1 - 2011/5/21
N2 - A series of linear fluorosilicone pentablock copolymers consisting of poly(dimethylsiloxane) (PDMS), poly(methyl methacrylate) (PMMA) and poly(dodecafluoroheptyl methacrylate) (PDFHM), named as PDMS-b-(PMMA-b-PDFHM) 2, have been synthesized by ATRP and their thermal properties, self-assembly behavior in different solutions and surface features of films have been systematically investigated. TGA measurements reflect that the thermal stability of PDMS-b-(PMMA-b-PDFHM)2 is enhanced by the middle-block PDMS. TEM observation and DLS analysis reveal that PDMS-b-(PMMA-b-PDFHM) 2 is able to self-assemble into unimers in both chloroform and dioxane solutions, and spherical micelles with a core-corona structure in chloroform, oblate spheroidal micelles with a multilayer core-corona structure in dioxane. The diameters of micelles in the dioxane solution are larger, while the concentrations of unimers in the chloroform solution are higher. SCA, QCM-D and XPS measurements have confirmed that the unimers play a dominant role in governing the surface properties of PDMS-b-(PMMA-b-PDFHM)2 films. In the case of PDMS-b-(PMMA-b-PDFHM)2 with a PMMA/PDMS weight ratio of 10:1 and 20%wt of DFHM content, the film cast from chloroform solution has a lower surface free energy of 16.8 mN m-1, lower adsorbed amounts of 8.6 × 104 ng cm-2 for water and 6.6 × 10 4 ng cm-2 for hexadecane, and higher surface stability. Such excellent thermal and surface properties demonstrate that this novel pentablock copolymer PDMS-b-(PMMA-b-PDFHM)2 is a promising candidate as a coating material.
AB - A series of linear fluorosilicone pentablock copolymers consisting of poly(dimethylsiloxane) (PDMS), poly(methyl methacrylate) (PMMA) and poly(dodecafluoroheptyl methacrylate) (PDFHM), named as PDMS-b-(PMMA-b-PDFHM) 2, have been synthesized by ATRP and their thermal properties, self-assembly behavior in different solutions and surface features of films have been systematically investigated. TGA measurements reflect that the thermal stability of PDMS-b-(PMMA-b-PDFHM)2 is enhanced by the middle-block PDMS. TEM observation and DLS analysis reveal that PDMS-b-(PMMA-b-PDFHM) 2 is able to self-assemble into unimers in both chloroform and dioxane solutions, and spherical micelles with a core-corona structure in chloroform, oblate spheroidal micelles with a multilayer core-corona structure in dioxane. The diameters of micelles in the dioxane solution are larger, while the concentrations of unimers in the chloroform solution are higher. SCA, QCM-D and XPS measurements have confirmed that the unimers play a dominant role in governing the surface properties of PDMS-b-(PMMA-b-PDFHM)2 films. In the case of PDMS-b-(PMMA-b-PDFHM)2 with a PMMA/PDMS weight ratio of 10:1 and 20%wt of DFHM content, the film cast from chloroform solution has a lower surface free energy of 16.8 mN m-1, lower adsorbed amounts of 8.6 × 104 ng cm-2 for water and 6.6 × 10 4 ng cm-2 for hexadecane, and higher surface stability. Such excellent thermal and surface properties demonstrate that this novel pentablock copolymer PDMS-b-(PMMA-b-PDFHM)2 is a promising candidate as a coating material.
UR - https://www.scopus.com/pages/publications/79955412917
U2 - 10.1039/c1jm10635j
DO - 10.1039/c1jm10635j
M3 - 文章
AN - SCOPUS:79955412917
SN - 0959-9428
VL - 21
SP - 6934
EP - 6943
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
IS - 19
ER -