Enhancements Of Foamability, Electromagnetic Interference Shielding And Mechanical Property Of Epoxy Microcellular Composite Foam With Well-Dispersed F-Mwcnts
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING(2020)
摘要
In this work, the well-dispersed functionalized MWCNTs (f-MWCNTs), which was fabricated by simply decorating the polyether amine (M2070) and organosilanes (KH560) chains, has been applied as filler in preparation of the epoxy/f-MWCNTs microcellular foam through batch foaming process with supercritical carbon dioxide (scCO(2)). Compared with acidified MWCNT (acid-MWCNTs) without decorating the organic groups, the f-MWCNTs achieved more uniform dispersion in epoxy matrix, acted as plasticizing agent to reduce the glass transition temperature (T-g) of epoxy/f-MWCNTs composites, as well as increasing the composite CO2 adsorption ability, hence greatly enhanced the foamability of epoxy/f-MWCNTs composite. By adding 20 wt% f-MWCNTs, the average cell size reduced from 46.32 mu m to 0.21 mu m and cell density increased from 2.70 x 10(7) cell/cm(3) to 2.74 x 10(13) cell/cm(3), respectively. In addition, the epoxy/f-MWCNTs microcellular foams presented enhanced electrical conductivity to 5.2 x 10(-4) S/m, electromagnetic interference shielding effectiveness (EMI SE) to 22.73 dB and compressive strength to 26.46 MPa.
更多查看译文
关键词
Microcellular foam, Epoxy, Functionalized MWCNTs, Supercritical carbon dioxide foaming
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络