Preparation of RF organci aerogels and carbon aerogels by alcoholic sol-gel process

摘要

Resorcinol formaldehyde organic aerogels and carbon aerogels are novel aerogels developed at the end of the 1980s[1].They have been shown to have a wide variety of applications such as drug deliverer,artificial organs or organ components and [2]electrodes of supercapacitors[3],for example.While organic aerogels and carbon aerogels have been widely studied for their unique properties and applications,it is desirableto develop new preparation methods to simplify the process.Generally,organic aerogels are obtained by aqua-sol-gel polymerization,solvent exchange and supercritical drying [1,4].The total process needs 2 weeks.We previously showed that monolithic RF aerogels could be obtained by drying paper,a new preparation emthod in simplify the producing process is developed by alcoholic sol-gel polymerization of resorcinol with for maldehyde.The time-consuming solvent exchanges are saved.