Time-Efficient Oxalic acid catalyzed Resorcinol−Formaldehyde organic gel
کلمات کلیدی:
Resorcinol Formaldehyde gel, Sol-gel, ambient drying condition, Aerogelچکیده
Resorcinol −formaldehyde (RF) aerogels are a class of organic materials that used as precursors of carbon aerogels. Usually, this type of materials prepared via a time-consuming base-catalyzed gelation process from an aqueous sol. In this regard, the acid catalyzed gelation method was proposed, and the physico-chemical properties of the resulted organic gel was investigated. The RF sol was prepared by mixing resorcinol (R) with formaldehyde (F) in catalyst solution (C) in the fixed mol ratios of (1, 2, and 5). The experimental results revealed that the gelation process proceeded in short time of 2 hr and the chemical nature of the resulted acid catalyzed gels was identical to the base-catalyzed RF gels with aggregated type structure of the incremented organic particles.
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مراجع
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