Construct a stable super-hydrophobic surface through acetonitrile extracted lignin and nano-silica and its application in oil-water separation
Construct a stable super-hydrophobic surface through acetonitrile extracted lignin and nano-silica and its application in oil-water separation
复制标题
乙腈提取木质素和纳米二氧化硅构建稳定的超疏水表面及其在油水分离中的应用
DOI：
10.1016/j.indcrop.2021.113471
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发表时间：
2021-04-02
影响因子：
5.9
通讯作者：
Wang, Haisong
中科院分区：
文献类型：
--
作者：
Gong, Xiaoyu;Meng, Yi;Wang, Haisong
如何简单、环保、低成本地制备油水分离膜仍然是一个巨大的挑战。在此背景下，本文报道了一种基于滤纸、乙腈提取木质素和二氧化硅的高效膜。膜的制备包括两个浸渍步骤，首先在滤纸表面涂覆一层薄薄的木质素，然后将二氧化硅纳米粒子附着在预涂覆的滤纸上，形成微纳二元结构，使滤纸的亲水性变为亲脂性和强疏水性。改性滤纸的接触角为168？，是118吗？高于由工业木质素和二氧化硅纳米颗粒制备的参比膜。在油水分离过程中，改性滤纸的分离效率高达98.6%。值得注意的是，考虑到所应用的低成本基底和简单的浸渍操作，预期该改性路线容易扩展到需要疏水化的多种其他基底。
It remains a great challenge for the simple, environmentally friendly and low-cost production of oil/water separation membrane. Under this backdrop, a highly efficient membrane based on filter paper, acetonitrile extracting lignin and silica is reported. Two impregnation steps are involved for the membrane preparation, firstly, a thin layer of lignin is coated on the surface of the filter paper and then, silica nanoparticles are adhered to the pre-coated filter paper, leading to the formation of a micro-nano binary structure, which turns the hydrophilicity nature of the filter paper into lipophilicity and strong hydrophobicity. The modified filter paper has a contact angle of 168?, which is 118? higher than that of a reference membrane prepared by technical lignin and silica nanoparticles. The modified filter paper exhibits an excellent separation efficiency as high as 98.6% in the process of oil/water separation. Notably, considering the applied low-cost substrates and the simple dipping operation, this modification route is expected to be easily extended to a versatile of other substrates that need to be hydrophobized.