Preparation of PDMS—Silica Nanocomposite Membranes with Silane Coupling for Recovering Ethanol by Pervaporation
Preparation of PDMS—Silica Nanocomposite Membranes with Silane Coupling for Recovering Ethanol by Pervaporation
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DOI：
10.1080/01496395.2010.527896
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发表时间：
2011-02
影响因子：
2.8
通讯作者：
P. Peng;Baoli Shi;Yongqiang Lan
中科院分区：
文献类型：
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作者：
P. Peng;Baoli Shi;Yongqiang Lan
本文采用硅烷偶联剂NH 2-C3 H6-Si（OC 2 H5）3改性纳米气相二氧化硅粒子，成功制备了以醋酸纤维素（CA）微滤膜为支撑体的聚二甲基硅氧烷（PDMS）复合膜。研究了硅含量、料液浓度和料液温度对纳米复合PDMS膜渗透汽化分离乙醇性能的影响。结果表明，改性二氧化硅粒子的加入显著提高了复合膜的渗透汽化性能。当膜中SiO2含量为5wt%时，在40°C下，对5wt%的乙醇/水混合物，膜的渗透通量保持在200 g · m-2 · h-1左右，分离因子达到最大值19。
In this article, the composite polydimethylsiloxane (PDMS) membranes supported by cellulose-acetate (CA) microfiltration membrane were successfully prepared by adding nano-fumed silica particles modified with a silane coupling reagent, NH2-C3H6-Si(OC2H5)3. The effects of silica content, feed concentration, and feed temperature on the pervaporation performances of the nano-composite PDMS membranes were investigated for recovering ethanol from aqueous solution by pervaporation. It was found that adding the modified silica particles significantly improved the pervaporation performances of the composite membranes. When the silica content in the membrane was 5 wt%, for a 5 wt% ethanol/water mixture at 40°C, the permeation flux of the membrane maintained about 200 g · m−2 · h−1 and separation factor reached the maximum value of 19.