In situ fastening graphene sheets into a polyurethane sponge for the highly efficient continuous cleanup of oil spills

作     者：Zhuang Kong Jinrong Wang Xianyong LU Ying Zhu Lei Jiang 

作者机构：Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and Environment Beihang University Beijing 100191 China Laboratory of Bio-inspired Smart Interfacial Science Technology Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2017年第10卷第5期

页      面：1756-1766页

核心收录：

学科分类：07[理学] 

基　　金：国家自然科学基金 北京市自然科学基金 国家973计划 

主　　题：graphene/polyurethane(PU) sponge in-situ polymerization continuous oil cleanup ultrahigh stability 

摘      要：Oil sorbents are an attractive option for oil-spill cleanup as they may be used for collection and complete removal of oil without adversely affecting the environment. However, traditional oil sorbents exhibit low oil/water separation efficiency and/or low oil-sorption capacity. In this study, an ultra-high performance graphene/polyurethane （PU） sponge has been successfully obtained by in situ polymerization in the presence of graphene dispersed in N-methylpyrrolidone （NMP）. During polymerization, the NMP/graphene dispersion not only serves as a weak amine catalyst for the formation of the sponge, but promotes fixation of the graphene sheets in the framework of the PU sponge owing to the strong dipole interaction between NMP and graphene. The as-prepared graphene/PU sponge was used as an absorbing material for the continuous removal of oil from oil-spill water. The graphene/PU sponge can continuously and rapidly remove oils from immiscible oil/water mixtures in corrosive solutions, including strong acids and bases, hot water, and ice water, with an excellent separation efficiency of above 99.99%. In addition, the as-prepared graphene/PU sponge was effective in separating surfactant-stabilized emulsions with a high separation efficiency of 〉99.91%.