Thermo-controlled,self-released smart wood tailored by nanotechnology for fast clean-up of highly viscous liquids  

作　　者：Yahui Cai Jianfei Wu Kaili Wang Youming Dong Jundie Hu Jiafu Qu Dan Tian Jianzhang Li Qiliang Fu 

机构地区：[1]Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing,China [2]School of Materials Science and Engineering,Suzhou University of Science and Technology,Suzhou,China [3]Scion,Rororua,New Zealand

出　　处：《SmartMat》2023年第1期153-167,共15页智能材料（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:22108125,21971113,22175094;Independent Innovation of Agricultural Science and Technology in Jiangsu Province,Grant/Award Numbers:CX(21)3166,CX(21)3163;the Natural Science Foundation of Jiangsu Province,Grant/Award Number:BK20210627;Doctor Project of Mass Entrepreneurship and Innovation in Jiangsu Province,Grant/Award Number:JSSCBS20210549;Nanjing Science&Technology Innovation Project for Personnel Studying Abroad and Research Start-up Funding of Nanjing Forestry University,Grant/Award Number:163020259;partially supported by the funding from the New ZealandMinistry of Business,Innovation and Employment(MBIE)in the Framework of the Strategic Science Investment Fund(No.C04X1703,Scion Platforms Plan)。

摘　　要：Designing highly porous materials is of great importance for liquid separation,water purification,and disinfection,such as spill oil cleaning and recycling,seawater desalting,and oil/water separation.However,a remaining challenge is to produce porous materials with the characteristics of fast absorption,continuous directional transport,and self-release of viscous liquid.Herein,a functional cellulosic composite is reported by the chemical treatment and functionalization of wood resulting in a smart wood that can thermally selfrelease and separate high viscosity oil.The smart wood has a high absorption speed of 1398 mL/(m_(2)·s)(ethylene glycol)and a maximum absorption capacity of 47.2 g/g(chloroform)due to its intrinsic vertical micro/nanoscale channel structure,low tortuosity,and high porosity.Moreover,the switchable wettability is achieved by the surface coating of poly(N-isopropylacrylamide)on the porous wood,which enables the collection and removal of oil from the oil/water mixture.The high viscosity oil can be automatically released due to the passive oil release at room temperature.The release capacity of the smart wood remains above 91%after 15 cyclic tests.We envision that this functional smart wood could be extended to a wide range of applications in smart hydrogels,microfluidics,artificial drug release,and environmental restoration.

关 键 词：fast clean-up NANOMATERIAL self-release smart wood thermal responsive 

分 类 号：TB381[一般工业技术—材料科学与工程]