Environment-friendly preparation of exfoliated graphite and functional graphite sheets  

作　　者：Shiyu Hou Shuaijie He Tianle Zhu Jihui Li Liqiang Ma Hongda Du Wanci Shen Feiyu Kang Zheng-Hong Huang 

机构地区：[1]State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing,100084,China [2]School of Space and Environment,Beihang University,Beijing,100191,China [3]School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing,100083,China [4]Guangdong Province Key Lab of Thermal Management Engineering and Materials,Graduate School at Shenzhen,Tsinghua University,Shenzhen,518055,China

出　　处：《Journal of Materiomics》2021年第1期136-145,共10页无机材料学学报（英文）

摘　　要：Exfoliated graphite(EG)is promising oil sorbent as well as an intermediate product for the preparation of flexible graphite films(FGFs).It has been a critical challenge to energy conservation and pollution abatement for the traditional EG production technique.Here,we propose a simple and effective preparation method to acquire EG in which flake graphite is intercalated and exfoliated at room temperature,not involving any pollutant emission.The influence factors in the preparation process were explored,such as the amount of H_(2)SO_(4)and H_(2)O_(2),the temperature for the preparation of room temperature exfoliated graphite(RTEG).In contrast to the EG by high temperature exfoliation(HTEG),RTEG exhibits a homogeneous structure and a significantly increased volume and surface area.Moreover,EG blocks with high oil sorption capacity and excellent reuse performance can be obtained by RTEG method.Especially,FGFs fabricated by RTEG has high flexibility,thermal conductivity and electrical conductivity.It suggests that this environment-friendly technology is suitable for large-scale industrial implementation of graphite-based oil sorbents and flexible materials.

关 键 词：Exfoliated graphite Room temperature Oil sorption Flexible graphite films Thermal conductivity 

分 类 号：TB33[一般工业技术—材料科学与工程]