• 文献标题:   In situ fastening graphene sheets into a polyurethane sponge for the highly efficient continuous cleanup of oil spills
  • 文献类型:   Article
  • 作  者:   KONG Z, WANG JR, LU XY, ZHU Y, JIANG L
  • 作者关键词:   graphene/polyurethane pu sponge, insitu polymerization, continuous oil cleanup, ultrahigh stability
  • 出版物名称:   NANO RESEARCH
  • ISSN:   1998-0124 EI 1998-0000
  • 通讯作者地址:   Beihang Univ
  • 被引频次:   14
  • DOI:   10.1007/s12274-017-1484-8
  • 出版年:   2017

▎ 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%.