Effect of Aqueous Epoxy Resin on Electrical Properties of Carbon Nanotubes Cement-based Composites
(0) The porous cement-based composite is commonly simplified to in-series or paralleled resistors and capacitors when electrical analysis.Aqueous epoxy resin (EP) has good compatibility to aqueous material,and superior moisture-insulation after hardened.In this work,some multi-wall carbon nanotube (MCNT) aqueous dispersion was stirred in aqueous EP,subsequently high-shear mixed into cement matrix,to fabricate four groups MCNT/epoxy resin/cement composite (MCNT/EP/CC) specimens with varied weight concentrations of MCNT (wMT) and 0.2 constant polymer cement ratio (P/C),along with the referential EP/CC composite with the same wMT & P/C.DC resistivity (ρ) & AC paralleling capacitance density (Cdp) under 20 kHz of the 28d-cured nanocomposites and the reference were characterized via a LCR meter.Results show,although the ρ and Cdp of the corresponding composite are much higher than those of MCNT/cement composite with the same wMT,the ρ and Cdp of the composite are almost time-independent,and significantly alter with wMT.With the wMT ranging from 0 wt% to 0.6 wt%,the ρ and Cdp of MCNT/EP/CC reaches the lowest and values (139.6 kΩ.cm,0.453 nF/cm2) at 0.3 wt% wMT,respectively.Microstructure reveals well compatibility and distribution of cured EP amongst the corresponding cement matrix even with highest wMT.These consequences indicate good stabilization effect of aqueous EP for the electrical-subjected cement-based composite in exposure environment.
Advanced cement-based material Carbon nanotube-based nanocomposite Aqueous epoxy resin Electrical performance stabilization
Luo Jianlin Li Qiuyi Duan Zhongdong Sun Shengwei Liu Xi
School of Civil Engineering, Qingdao Technological University, Qingdao, 266033 China Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055 China School of Civil Engineering, Qingdao Technological University, Qingdao, 266033 China; School of Civi School of Civil Engineering, Qingdao Technological University, Qingdao, 266033 China; School of Life
国际会议
上海
英文
126-126
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）