Details

Autor(en) / Beteiligte

• Yang, Wentao
• Wang, Zhan
• Zhou, Yuenan
• Cheng, Lina
• Zhang, Qian
• Zhang, Ximing

Titel

Preparation of porous membrane by combined use of thermally and chemical reaction-introduced nonsolvent-induced phase separations

Ist Teil von

• Desalination and water treatment, 2015-02, Vol.53 (8), p.2059-2069

Ort / Verlag

Abingdon: Elsevier Inc

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Microporous polyacrylonitrile membranes were prepared via the combination of thermally and chemical reaction-introduced nonsolvent-induced phase separations (TIPS and CRINIPS). In the membrane preparation, glacial acetic acid (GA) and aqueous solution of 2 wt.% sodium bicarbonate were used as additive and coagulation media, respectively, and chemical reaction between GA and sodium bicarbonate resulted in uniform microporous membranes. Pore connectivity and asymmetry were significantly improved when coagulation bath temperature was lowered to 15°C. The fouling mechanisms of the prepared membrane were analyzed by nonlinear regression method and cake filtration model was the most appropriate for the membrane prepared via combining TIPS and CRINIPS. The pore structure was made connective and asymmetric by using a 15°C aqueous solution of 2 wt.% sodium bicarbonate as coagulation media in membrane precipitation process, and the average pore size reduced from about 0.125 to 0.097μm while decreasing the glass plate temperature from 80 to 20°C.