High-hydrophobic -CF3 groups within PTFPMS membrane for enhancing the furfural pervaporation performance

被引:32
|
作者
Yang, Yinhua [1 ]
Si, Zhihao [1 ]
Cai, Di [1 ]
Teng, Xingning [1 ]
Li, Guozhen [1 ]
Wang, Ze [1 ]
Li, Shufeng [1 ]
Qin, Peiyong [1 ]
机构
[1] Beijing Univ Chem Technol, Natl Energy R&D Ctr Biorefinery, Beijing 100029, Peoples R China
基金
北京市自然科学基金;
关键词
Furfural; PTFPMS; Pervaporation; Hydrophobicity; Membrane; MIXED MATRIX MEMBRANE; NANOCOMPOSITE MEMBRANES; POLYDIMETHYLSILOXANE MEMBRANE; CHITOSAN MEMBRANES; WATER MIXTURES; FREE-VOLUME; SEPARATION; ETHANOL; RECOVERY; PDMS;
D O I
10.1016/j.seppur.2019.116144
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A high hydrophobicity of membrane plays a vital role in separating organics from dilute solution by pervaporation, which highly contributes to the increase of organics selectivity. Herein, we chose the high-hydrophobic poly[(3,3,3-trifluoropropyl)methylsiloxane] (PTFPMS) material to prepare the pervaporation membrane using a green method for the first time. Within the PTFPMS membrane, the -Si-O- chains imply the hydrophobic nature, and introducing -CF3 groups further enhances the hydrophobicity. The high-efficiency transport pathways are formed in which water will experience a larger diffusion resistance within PTFPMS membrane compared with the conventional polydimethylsiloxane (PDMS) membrane without -CF3 groups. Moreover, considering the great threat of organic solvent to the environment and operators during membrane preparation, a green approach using water instead of organic solvent was employed. Especially, when separating 1 wt% furfural aqueous solution at 80 degrees C, there are 30% of increase in the furfural separation factor (45.6) and an effective increase in furfural flux (328 g m(-2) h(-1)) compared with those of PDMS membrane. Overall, the super-hydrophobic PTFPMS membrane highly improves the feasibility of the downstream processes for recovering the biomass derives furfural.
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页数:8
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