期刊
CARBOHYDRATE POLYMERS
卷 253, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.117220
关键词
Bacterial cellulose; Needle-leaf bleached kraft pulp; Superhydrophobic membrane; Oil/water separation
资金
- National Natural Science Foundation of China [21978219, 21576212]
- Natural Science Foundation of Tianjin [19JCZDJC34700]
- Tianjin Science and Technology Support Program [19PTSYJC00060]
Plant cellulose needle-leaf bleached kraft pulp (NBKP) was added to bacterial cellulose (BC) to create a superhydrophobic/superoleophilic membrane for oil/water separation, exhibiting excellent separation efficiency, recyclability, and durability. The membrane remained durably hydrophobic after multiple cycles and is expected to be highly energy-efficient.
Bacterial cellulose (BC) is a substrate material with high purity and robust mechanical strength, but due to its small pore size and relatively expensive price, it is restricted as an oil-/water separation membrane. In this study, cheaper plant cellulose needle-leaf bleached kraft pulp (NBKP) was added to BC to increase the pore size of the composite membrane, and a superhydrophobic/superoleophilic membrane was prepared for oil-/water separation. The modified membrane surface displayed a petal-like micro-structure and a water contact angle (WCA) of 162.3 degrees, while the oil contact angle was decreased to 0 degrees. What's more, the membrane exhibited excellent oil-/ water separation under gravity, recyclability, and a separation efficiency (>95 %), and it was both pH and salt resistant. The membrane also remained durably hydrophobic after 10 separation cycles. And the separation methodology is expected to be highly energy-efficient.
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