文献类型：期刊文献

中文题名：超疏水磁性纤维素气凝胶的制备及其吸油性能

英文题名：Fabrication and oil absorbency of superhydrophobic magnetic cellulose aerogels

作者：尚倩倩[1,2] 陈健强[2,3] 杨晓慧[1,2] 刘承果[1,2] 胡云[1,2] 周永红[1,2]

第一作者：尚倩倩

机构：[1]中国林业科学研究院林产化学工业研究所,南京210042;[2]南京林业大学,江苏省林业资源高效加工利用协同创新中心,南京210037;[3]南京林业大学生物与环境学院,南京210037

年份：2019

卷号：4

期号：6

起止页码：105-111

中文期刊名：林业工程学报

外文期刊名：Journal of Forestry Engineering

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家重点研发计划政府间国际科技创新合作重点专项(2017YFE0106800);国家自然科学基金(31700522);江苏省自然科学基金(BK20150072);江苏省“双创计划”资助(苏人才办(2016)32号)

语种：中文

中文关键词：超疏水;纤维素;气凝胶;磁响应;油水分离

外文关键词：superhydrophobic;cellulose;aerogel;magnetic response;oil/water separation

分类号：O636.1

摘要：以水溶性的甲基纤维素和磁性Fe3O4纳米粒子为原料,经过共混、环氧氯丙烷交联及冷冻干燥等过程制备了磁性纤维素气凝胶,并进一步以十六烷基三甲氧基硅烷(HDTMS)为改性剂,通过化学气相沉积法对气凝胶进行改性,得到超疏水磁性纤维素气凝胶材料。采用扫描电镜(SEM)、红外光谱(FT-IR)和光学接触角测量仪对气凝胶的结构性能进行表征分析,结果表明所制备的气凝胶具有三维贯通的多孔网络结构,表面改性没有改变气凝胶的微观结构;经HDTMS修饰后的磁性纤维素气凝胶具有超疏水和超亲油性能(水接触角为150.4°,油接触角为0°)。气凝胶展现出良好的油/水选择性和较高的油吸附能力,对多种油品和有机溶剂的吸附量达到45~98g/g;吸油后的气凝胶可通过磁铁快速回收。气凝胶具有可多次循环使用的性能,循环使用30次后吸附能力仍然保持在80%以上,可以通过简单的力学挤压把吸附的油挤出来,使得废油的回收利用过程变得简单,同时也有利于节约吸附材料,降低油水分离成本。
Because of the rapid development of manufacturing in the world,oil leakage and industrial pollution have occurred frequently and caused serious consequences,such as economic loss and environmental pollution.Therefore,developing functional materials for effective oil/water separation has become a global concern.Superhydrophobic cellulose aerogel is an attractive candidate for effective oily water treatments due to its lightweight,high porosity and renewability.However,the development of a low cost and facile method for the fabrication of superhydrophobic cellulose aerogel with eco-friendliness and reusability for large region oil/water separation still remains a challenge.In this work,methylcellulose and magnetic Fe3O4 nanoparticles were used as raw materials with epichlorohydrin as cross-linking agent for the fabrication of magnetic cellulose aerogels through blending,cross-linking reaction and freeze-drying processes.Thereafter,the superhydrophobic magnetic cellulose aerogel(SMMC)was obtained using hexadecyltrimethoxysilane(HDTMS)as the hydrophobic modifier via a chemical vapor deposition process.The surface morphology,chemical structure and surface wettability of the aerogel were characterized by the scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FT-IR)and optical contact angle measuring instrument.The results showed that the as-prepared cellulose-based aerogel had three-dimensional porous network microstructure with the aggregations of Fe3O4 nanoparticles on the skeletons and the surface hydrophobic modification process had slight effect on the microstructure of the cellulose-based aerogel.The SMMC aerogel exhibited a low density of 0.0142 g/cm^3 and a high porosity of 98.86%.After the modification,the superhydrophobic and superoleophilic properties of the aerogel with water contact angle of 150.4°and oil contact angle of 0°were reached.Due to the excellent superhydrophobicity/superoleophilicity and high porosity,the SMMC aerogel showed good oil/water selectivity and excellent oil adsorption capacity as high as 45-98g/g for various oil and organic solvents.The SMMC aerogel after oil absorption could be recovered quickly using magnets because of the presence of Fe3O4 nanoparticles.Moreover,the as-prepared superhydrophobic SMMC aerogel had outstanding recyclability and still maintained at least 80%oil adsorption capacity after 30 adsorption cycles.The adsorbed oil could be easily re-collected by squeezing the aerogels.These excellent properties of the superhydrophobic cellulose-based aerogel combined with its facile fabrication process make it a promising candidate for oil/water separation in marine environments.