膜科学与技术

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Preparation of flat sheet hydrophobic microporous membrane by co-blending PE and PP via TIPS and the performances of VMD

Authors： TANG Na1,2,* JIANG Jianwei1,2 YUAN Lina1,2 ZHANG Lei1,2
HAN Huaiyuan1,2

Units： 1. College of Marine Science and Engineering，Tianjin University of Science and Technology ，Tianjin 300457；2.Tianjin Key Laboratory of Marine Resources and Chemistry，Tianjin 300457

KeyWords： thermally induced phase separation ( TIPS) ; polypropylene ( PP); polyethylene(PE); blend membrane; membrane distillation(MD)

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2013,33(6):47-52

Abstract：

Hydrophobic microporous membranes were prepared via the thermally induced phase separation process (TIPS) using polyethylene (PE) and polypropylene (PP). Polyethylene terephthalate (PET) was chosen as the membrane supporting material and oil bean was the dilute. The effects of membrane formation conditions such as the quenching temperature, mass ratio of PE and PP, extraction time and the operating conditions of VMD were studied in this work. The results showed that the optimized membrane formation conditions were: the temperature of casting solution was 220℃, the concentration of PP and PE blends in casting solution was 30%, mass ratio of PE and PP was 1:6, the nucleating agent concentration of adipic acid was 0.3％, the average thickness of membrane was 225μm, the quenching temperature was 45℃, the extraction time of n-hexane was 24h. VMD pure water flux of membrane reached 10.68 kg•m-2•h-1 and the salt rejection was higher than 99.8%, the average of co-blending membrane was 0.16 μm which was prepared at the optimized membrane formation conditions, and VMD operated conditions were: the vacuum was 0.095 MPa, the temperature and flow rate of recycling water were 348.15K and 35 L•h-1 respectively.

Funds：

天津市海洋局科技兴海项目(KX2010_0010) ，天津市滨海新区科委小巨人项目（2011-XJR13020）

AuthorIntro：

唐娜（1972-），女，辽宁海城市人，博士，教授，博士研究生导师。主要研究方向：膜分离、海卤水资源综合利用．（tjtangna@tust.edu.cn）

Reference：

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