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Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption

机译:Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption

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摘要

A facile Pickering emulsion templated approach is used to achieve nanocelluloses (NCs)/poly(aryl ether ketone) (PAEK) composite aerogels with low density and hierarchical porous structure. In this article, we evaluate the factors including water-oil volume ratio, PAEK loading and NCs species to unravel the impact of fiber morphology on the formation and properties of the Pickering emulsions and aerogels. The results show both cellulose nanofibrils (CNF) and microfibrous cellulose (MFC) display excellent performance in stabilizing Pickering emulsions. Besides, the NCs/PAEK composite aerogels reveal a nanonet constructed porous network with excellent properties of thermal insulation. The lowest thermal conductivity of 17.8 mW center dot m(-1)center dot K-1 is obtained for the CNF/PAEK composite aerogel. To our knowledge, this is one of the most efficient thermal insulators in the reported NCs-based aerogels. Additionally, the NCs/PAEK composite aerogels demonstrate an efficiency of 98.1 in diphenylamine adsorption of water. These findings reveal a potential application of NCs/PAEK composite aerogels in adsorbent and thermal insulators in chemical industries and the construction sector.

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