用于油水分离的超疏水交联纳米纤维素气凝胶的简易制备
Facile Fabrication of Superhydrophobic Cross-Linked Nanocellulose Aerogels for Oil-Water Separation.
作者信息
Shang Qianqian, Chen Jianqiang, Hu Yun, Yang Xiaohui, Hu Lihong, Liu Chengguo, Ren Xiaoli, Zhou Yonghong
机构信息
Institute of Chemical Industry of Forest Products, CAF, Key Lab. of Biomass Energy and Material, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, China.
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.
出版信息
Polymers (Basel). 2021 Feb 19;13(4):625. doi: 10.3390/polym13040625.
A facile and environmental-friendly approach was developed for the preparation of the cross-linked nanocellulose aerogel through the freeze-drying process and subsequent esterification. The as-prepared aerogel had a three-dimensional cellular microstructure with ultra-low density of 6.05 mg·cm and high porosity (99.61%). After modifying by chemical vapor deposition (CVD) with hexadecyltrimethoxysilane (HTMS), the nanocellulose aerogel displayed stable super-hydrophobicity and super-oleophilicity with water contact angle of 151°, and had excellent adsorption performance for various oil and organic solvents with the adsorption capacity of 77~226 g/g. Even after 30 cycles, the adsorption capacity of the nanocellulose aerogel for chloroform was as high as 170 g/g, indicating its outstanding reusability. Therefore, the superhydrophobic cross-linked nanocellulose aerogel is a promising oil adsorbent for wastewater treatment.
通过冷冻干燥过程和后续酯化反应，开发了一种简便且环保的方法来制备交联纳米纤维素气凝胶。所制备的气凝胶具有三维蜂窝状微观结构，密度超低，为6.05 mg·cm ，孔隙率高（99.61%）。用十六烷基三甲氧基硅烷（HTMS）通过化学气相沉积（CVD）对其进行改性后，纳米纤维素气凝胶表现出稳定的超疏水性和超亲油性，水接触角为151°，对各种油类和有机溶剂具有优异的吸附性能，吸附容量为77~226 g/g。即使经过30次循环，纳米纤维素气凝胶对氯仿的吸附容量仍高达170 g/g，表明其具有出色的可重复使用性。因此，超疏水交联纳米纤维素气凝胶是一种用于废水处理的很有前景的油吸附剂。
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