Hydrophobic modification of poly(aryl ether ketone ketone) aerogel via poly(dimethylsiloxane)

Abstract

Property and structure of aerogels with polar groups almost suffer from their high hydrophilicity. In this study, in order to improve the hydrophobicity of poly(aryl ether ketone ketone) aerogel prepared from poly(aryl ether ketone ketone) containing trimethoxysilane side groups, hydroxy-terminated poly(dimethylsiloxane) was added. During gelation, hydroxy-terminated poly(dimethylsiloxane) condensed with the methoxy groups or the hydrolyzed methoxy groups of the trimethoxysilane side groups. It was found that the hydrophobicity of poly(aryl ether ketone ketone) aerogel improved significantly even though only 5 wt% hydroxy-terminated poly(dimethylsiloxane) was added, and the hydrophobicity of the modified poly(aryl ether ketone ketone) aerogel showed an increase trend with increasing the content of hydroxy-terminated poly(dimethylsiloxane).