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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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