Effect of Coal Tar Pitch on Improvement of Thermal Insulation Performance of Carbon Aerogels Based on Novolac Resin

Effect of Coal Tar Pitch on Improvement of Thermal Insulation Performance of Carbon Aerogels Based on Novolac Resin

Document Type : Original Research

Abstract

The current study is based on synthesis a low cost carbon aerogel with improved properties and thermal insulator approach. In this work cheap novolac resin are used as a raw material for producing polymer aerogel by ambient drying method; then the coal tar pitch is added to samples by immerging them in pitch solution. In next step novolac-pitch polymer aerogels is converted to carbon nano-structure aerogels by pyrolysis heat treatment at inert atmosphere. The results proved, nano-structured aerogels with predictable density will be achieved by this method; also by studying on microstructure and morphology of aerogels it founded these aerogels have high porosity, low density(about 0.1-0.4 g/cm3) and high specific surface area (about 600 m2/g). The charring pitch was a lot and using of it made improved thermal properties that resulted in at least 100s delay in increasing temperature in time-temperature history test; as a result a high performance thermal insulator achieved.

Keywords

Carbon aerogel

Novolac resin

Coal tar pitch

Pyrolysis

Thermal properties

Subjects

Biomedical Enginireeng

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