Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7043833 | Separation and Purification Technology | 2018 | 33 Pages |
Abstract
In this work, a simple coating method was employed to prepare a highly stable graphene oxide (GO) membrane for oil-in-water emulsions separation. By using mussel inspired polydopamine (PDA) as covalent linker, mixed cellulose ester membrane (MCEM) was successfully modified with PDA layer by self-polymerize, then GO nanosheets were attracted onto PDA/MCEM by simple vacuum filtration method, lead to the formation of GO/PDA/MCEM. The as-prepared membranes were characterized by FT-IR, TEM, AFM and contact angle, respectively. The results indicated that GO layer was uniformly coated on the support, and GO/PDA/MCEM had a rough surface and good hydrophilic property. Attributing to both the high adhesive ability of PDA and possible covalent interaction between GO and PDA, GO/PDA/MCEM was highly stable by being immersed in water environment for 12â¯h. GO/PDA/MCEM was employed to separate Tween-80 stabilized oil-in-water emulsions. The results showed that the prepared GO/PDA/MCEM had effective separation performance and reusability in the oil-in-water emulsions filtration for four cycles. This study provided a feasible, simple and economical way to prepare a highly stable GO-based membrane for oil-in-water emulsions filtration.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Zhanchao Liu, Weifu Wu, Yan Liu, Changchun Qin, Minjia Meng, Yinhua Jiang, Jian Qiu, Jianbo Peng,