Effects of Carbon-based Nanofillers on the Structure and Property of Phenolic Foam

초록

Resole-type phenolic resin was mixed with carbon-based nanofillers, such as graphene oxide (GO) and multi walled carbon nanotube (MWCNT), and the cell size, cell structure, and mechanical, thermal and acoustic properties of the phenolic foam were investigated. The closed hexagonal cell structure was observed for all foams and the cell size of MWCNT embedded phenolic foam was smaller than that of the unreinforced phenolic foam. The smaller cell resulted in the higher mechanical strength. The GO and MWCNT additions in the cell walls imparted a high resistance to brittle failure under flexural loading. The thermal conductivity of 0.1wt% of GO or MWCNT infiltrated phenolic foam increased more than two times. The transmission loss of the phenolic foam with a 0.1 wt% of GO and MWCNT was effective in the lower and higher frequency region. Among the nanofiller-contained phenolic foams, the phenolic foam with MWCNT showed the highest absorption coefficient over 500 similar to 4000 Hz region.

키워드