TY - JOUR
T1 - Formation of poly(vinylidene fluoride) (PVDF) membranes via thermally induced phase separation
AU - Gu, Minghao
AU - Zhang, Jun
AU - Wang, Xiaolin
AU - Tao, Haijun
AU - Ge, Litian
PY - 2006/5/10
Y1 - 2006/5/10
N2 - The effects of diluents, thermodynamic interactions, different quenching conditions and coarsening on the morphology of poly(vinylidene fluoride) (PVDF) membranes via thermally induced phase separation were investigated. Scanning electron microscopy indicated that an interconnected spherulitic structure was obtained in the PVDF-DMP system, while the PVDF-DMP-DOS and PVDF-DMP-DOA systems showed a jagged and sharp-edged spherulitic structure. As the interactions decreased, the spherulitic structure was increasingly non-discernable and the value of porosity increased in the order of PVDF-DMP, PVDF-DMP-DOA, PVDF-DBP and PVDF-DMP-DOS. When quenching in 353 K and 368 K, the spherulities became more discernable, and the size of spherulity increased. When quenching in different conditions, the discernible spherulitic structure was obtained in ice water, a greater spherulitic size was obtained in a water bath at 303 K, and PVDF crystallized much slower and improved in an air bath.
AB - The effects of diluents, thermodynamic interactions, different quenching conditions and coarsening on the morphology of poly(vinylidene fluoride) (PVDF) membranes via thermally induced phase separation were investigated. Scanning electron microscopy indicated that an interconnected spherulitic structure was obtained in the PVDF-DMP system, while the PVDF-DMP-DOS and PVDF-DMP-DOA systems showed a jagged and sharp-edged spherulitic structure. As the interactions decreased, the spherulitic structure was increasingly non-discernable and the value of porosity increased in the order of PVDF-DMP, PVDF-DMP-DOA, PVDF-DBP and PVDF-DMP-DOS. When quenching in 353 K and 368 K, the spherulities became more discernable, and the size of spherulity increased. When quenching in different conditions, the discernible spherulitic structure was obtained in ice water, a greater spherulitic size was obtained in a water bath at 303 K, and PVDF crystallized much slower and improved in an air bath.
KW - Diluents
KW - Membrane
KW - PVDF
KW - Spherulitic structure
KW - Thermally induced phase separation
UR - http://www.scopus.com/inward/record.url?scp=33645912923&partnerID=8YFLogxK
U2 - 10.1016/j.desal.2005.10.015
DO - 10.1016/j.desal.2005.10.015
M3 - 文章
AN - SCOPUS:33645912923
SN - 0011-9164
VL - 192
SP - 160
EP - 167
JO - Desalination
JF - Desalination
IS - 1-3
ER -