四氟乙烯
微型多孔材料
膜蒸馏
膜
氟化物
材料科学
化学工程
高分子化学
六氟丙烯
聚四氟乙烯
化学
复合材料
聚合物
海水淡化
无机化学
共聚物
工程类
生物化学
作者
Chunsheng Feng,Baoli Shi,Guomin Li,Yonglie Wu
标识
DOI:10.1016/j.memsci.2004.02.007
摘要
Flat-sheet microporous membranes from F2.4 for membrane distillation (MD) were prepared by phase inversion process. Dimethylacetamide (DMAC) and LiClO4·3H2O/trimethyl phosphate (TMP) were, respectively, used as solvent and pore-forming additives. The effects of casting solution composition, exposure time prior to coagulation and temperature of precipitation bath on F2.4 membrane structure were investigated. The morphology of resultant porous membrane was observed by scanning electron microcopy. Some natures of F2.4 porous membrane after drying in air, such as mechanical properties and hydrophobicity, were exhibited and compared with poly(vinylidene fluoride) (PVDF) membrane prepared by the same ways. Stress-at-break and strength stress of F2.4 microporous membrane are higher than that of PVDF membrane, and elongation percentage of F2.4 membrane at break is about eight-fold as great as that of PVDF membrane. Contact angle of F2.4 microporous membrane to water (86.6±0.51°) was also larger than that of PVDF membrane (80.0±0.78°). MD experiment was carried out using a direct contact membrane distillation (DCMD) configuration as final test to permeate performance of resultant microporous membrane. The permeate flux of F2.4 experimental membrane was higher than that of PVDF membrane under the same operational conditions.
科研通智能强力驱动
Strongly Powered by AbleSci AI