材料科学
聚偏氟乙烯
膜
木质素
化学工程
表面改性
生物污染
多孔性
废水
有机化学
聚合物
复合材料
废物管理
化学
生物化学
工程类
作者
Jinmin Zhao,Juanli Chen,Liting He,Youhua Cao,Chengqiang Peng,Jing Fang,Zhongyu Duan,Hao Li
标识
DOI:10.1016/j.mtcomm.2023.106055
摘要
Polyvinylidene fluoride membranes (PVDFMs) are frequently used in oil-water separation due to their stable properties, high porosity, and modification easily. However, the pollution, low separation efficiency, and low recovery rate of PVDFMs have limited the oil sewage treatment. This work is based on dopamine-modified PVDFMs, which prepared hydrophilic separation membranes by attaching hydroxymethylated lignin (HAL) to PVDFMs. Lignin was hydroxymethylated to improve its hydrophilicity. Additionally, HAL was assembled on the surface of PVDFMs with the effect of dopamine (DA) and 3-aminopropyltriethoxysilane (KH550). The effect of the ratio of DA and KH550 (D: K) and HAL concentration on the hydrophilic effect was explored. The modified membranes exhibited considerable separation efficiency (>99 %) for several kinds of oil-water emulsions and could be recycled multiple times. This green modification method using lignin provides an environmentally friendly solution for modifying PVDFMs.
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