ZHANG Rui, LI Wen, HU Zi-jun, ZHANG Zuo, CHEN Kun, XU Chun-hua, . Effect of hydrophilic groups in the polymer matrix on the porosity of organic and carbon aerogels produced from melamine, phenolic resole and formaldehyde. New Carbon Mater., 2009, 24(3): 237-242.
Citation:
ZHANG Rui, LI Wen, HU Zi-jun, ZHANG Zuo, CHEN Kun, XU Chun-hua, . Effect of hydrophilic groups in the polymer matrix on the porosity of organic and carbon aerogels produced from melamine, phenolic resole and formaldehyde. New Carbon Mater., 2009, 24(3): 237-242.
ZHANG Rui, LI Wen, HU Zi-jun, ZHANG Zuo, CHEN Kun, XU Chun-hua, . Effect of hydrophilic groups in the polymer matrix on the porosity of organic and carbon aerogels produced from melamine, phenolic resole and formaldehyde. New Carbon Mater., 2009, 24(3): 237-242.
Citation:
ZHANG Rui, LI Wen, HU Zi-jun, ZHANG Zuo, CHEN Kun, XU Chun-hua, . Effect of hydrophilic groups in the polymer matrix on the porosity of organic and carbon aerogels produced from melamine, phenolic resole and formaldehyde. New Carbon Mater., 2009, 24(3): 237-242.
Effect of hydrophilic groups in the polymer matrix on the porosity of organic and carbon aerogels produced from melamine, phenolic resole and formaldehyde
School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 200235, China|
School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China|
Funds:
National Nature Science Foundation of China (50872033); National Science and Technology Supporting Program (2007BAE55B03) and 973 Grant (2006CB600907).
Organic and carbon aerogels were synthesized by the solution-sol-gel polymerization of melamine (M), phenolic resole (PR), m-cresol and formaldehyde in a basic aqueous solution followed by supercritical petroleum drying and pyrolysis. The effect of hydrophilic groups in the polymer matrix on the porosity of organic and carbon aerogels was investigated by varying the M/PR ratio under otherwise identical conditions. It was found that increasing hydrophilic melamine content increases intermolecular interactions of polymers that form gels, which favors an improvement in the stability of gels in supercritical drying and pyrolysis. The increase of melamine content also increases the mass loss of organic aerogels during pyrolysis, which is unfavorable for their stability. The pore size distributions, surface areas, meso-porosity and macroporosity of carbon aerogels were a compromise between the two opposing factors.
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