Preparation of phenol-formaldehyde foams using fulvic acid

preparation fulvic acid(FA) from lignite in particular process, fulvic acid-phenol-formaldehyde foams(FAPF) were synthesized using the FA as the replacement of phenol at varying ratios from 15-60 wt.%. The effects of foaming agent (dichlormethan), surface active agent(tween-80), curing agengt(hydrochloric acid and phosphoric acid 1:1wt/wt), foaming temperature and FA amount on the property of foam were determined. Curing and foaming were synchronized when foaming agent was 2-6wt.% of the resin, surface active agent was 3-4wt.%, curing agengt was 12-16wt%, foaming temperature was 70-80 degrees C and FA less than 40wt.%. structure and characterized performance analysis of FAPF Through the Fourier infrared spectroscopy (IR), thermogravimetric (TG) and compressive strength. The results show that: FA could be used as a very good material of partly replace phenol.