论文部分内容阅读
Developing multifunctional cement-based materials has been a long engineering pursuit that holds great promise and impact for altering the building materials landscape.However, despite recent progresses in other fields such as advanced materials and emerging nanomaterials, there has been little progress in cementitious materials front.Herein.we report the synthesis and characterization of multifunctional cement and concrete composites reinforced via emerging two-dimensional (2D) nanomaterials such as hexagonal boron nitride (h-BN) and graphite oxide (GO).This strategy leads to superior mechanical strength and oil adsorption properties compared to composites devoid of h-BN and GO.Our electron microscopy characterizations show that while GO bridges the cement surfaces, h-BN sheets mechanically reinforce the composites and adsorb the oil.We find that introduction of these fillers even at low filler weight fractions increases the compressive strength and toughness properties of pristine cement and of porous concrete significantly, while the porous composite concrete illustrates excellent ability for water separation, hydrophobicity and crude oil adsorption.This work is the first attempt in integrating thin h-BN nanomaterial sheets into cement and can provide novel insights for nanoengineering cement based composites to develop novel forms of multifunctional structural materials with a range of environmental applications.