膜科学与技术

碳纳米管填充硅橡胶膜用于大豆油/正己烷混合油的溶剂回收研究

作者：孙艳芝¹ 蔡卫滨² 韩小龙² 张洪林¹ 李继定² 朱慎林²

单位： 1曲阜师范大学，化学与化工学院，曲阜273165；2清华大学，化学工程系，化学工程联合国家重点实验室，100084

关键词：碳纳米管; 正己烷; 大豆油; 混合油; 回收

出版年,卷(期):页码： 2012,32(2):80-86

摘要：

采用膜分离技术取代当前的蒸发工艺来回收植物油浸取工艺中的浸取溶剂，这一新技术不涉及相变，节能效果明显。为此，研制了单壁碳纳米管填充聚二甲基硅氧烷/聚偏氟乙烯（PDMS/PVDF）复合膜，通过接触角和SEM等方法对复合膜的表面进行了表征。将制备的复合膜应用于从大豆油/正己烷（1:3, w/w）混合油中回收溶剂正己烷的研究，考察了碳纳米管填充量和高温纯化处理对复合膜分离性能的影响。结果表明，碳纳米管经高温纯化预处理后，所制成填充复合膜的分离性能得到了较大的提高

Distillation is commonly used for traditional solvent recovery in the extraction step of edible oil processing, which consumes large amounts of energy. As an alternative solvent recovery method, membrane separation process can reduce the energy consumption greatly. In this work, incorporation of single-wall carbon nanotubes (SWNTs) into cross-linked polydimethylsiloxane / polyvinylidene fluoride (PDMS/PVDF) composite membranes were prepared, and employed in the recovery of hexane from soybean oil/hexane miscellas (1:3, w/w). The SWNTs filled PDMS/PVDF composite membranes were characterized by Contact angle meter and SEM. The effects of filling content and thermal pre-treatment of SWNTs on the separation performance were studied. It was found that the separation performances of the SWNTs filled PDMS/PVDF composite membranes were greatly improved with thermal treatment.

孙艳芝(1985－)，女，山东邹平县人，硕士研究生，从事膜分离研究. 通讯联系人李继定，清华大学化工系教授，电话：（010）62782432 E－mail：lijiding@mail.tsinghua.edu.cn

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