期刊
APPLIED SURFACE SCIENCE
卷 322, 期 -, 页码 101-110出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2014.10.083
关键词
Polyvinylidene fluoride (PVDF); Phenolphthalein polyethersulfone (PES-C); Membrane; Resistance; Foulant
类别
资金
- National Natural Science Foundation of China [21105023]
- Scientific Research Starting Foundation for Returned Overseas Chinese Scholars, Ministry of Education of China
- Donghua University Central University Scientific Research special fund [2232012D3-32]
- Shandong Nature Science Foundation [BS2013HZ027]
Polyvinylidene fluoride (PVDF) membrane and PVDF membrane with phenolphthalein polyethersulfone (PES-C) addition were prepared via thermally induced phase separation (TIPS) method by using diphenyl-carbonate (DPC) and dimethyl acetamide (DMAc) as mixed diluents. The effects of coagulation temperature and pre-evaporation time on structure and properties of membranes were studied. The changes of sewage flux in MBR and the attenuation coefficient of sewage flux were investigated. The resistance distributions of PVDF and PVDF/PES-C membranes were compared by resistance analysis. Membrane composition and structure were characterized by ATR-FTIR, TGA, SEM and AFM. The foulant on membranes was analyzed by FTIR. The contact angle of PVDF/PES-C membrane was lower than that of PVDF membrane. A thinner skin layer and a porous cellular support layer formed in PVDF/PES-C membrane and resulted in a higher porosity and pure water flux. The pure water flux and porosity of PVDF/PES-C membrane increased with rising coagulation temperature and decreased with extending pre-evaporation time. The flux attenuation coefficient, the cake layer resistance and internal fouling resistance of PVDF/PES-C membrane in MBR were smaller than those of PVDF membrane in MBR. The FTIR spectrum of foulant on membrane indicated that the foulant on PVDF/PES-C membrane was mostly composed of protein and polysaccharide, while the foulant on pure PVDF membrane included biopolymer clusters besides protein and polysaccharide. (C) 2014 Elsevier B.V. All rights reserved.
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