Preparation and properties of polyurethane foam based on extract of cotton spinning black liquor
In order to solve the problem that the biomass resource of cotton spinning black liquor is not efficiently utilized,which causes resource waste,this paper proposed a method to prepare polyurethane foam(PUF)based on the extract of cotton spinning black liquor.First,the raw material was prepared by acid precipitation method,and then the polyurethane foam was partially prepared by one-step foaming method instead of polyether polyol.Finally,infrared(FTIR),optical microscope,scanning electron microscope(SEM),thermogravimetric analysis(TGA),horizontal combustion,degradation test and other means were used to characterize the foam surface and carbon residue morphology,thermal stability,flame retardancy and degradation.The results showed that the partial substitution of polyether polyols with cotton spinning black liquor extract improved the thermal stability and carbonization performance of PUF materials,When the substitution rate of cotton spinning black liquor extract was 30％,the apparent density of polyurethane foam was 0.0439g/cm3,the thermal conductivity was 0.03088W/(m·K),the initial decomposition temperature was 214℃,the carbon residue rate was 45％at 700℃,the horizontal combustion carbonization length was 0.5mm,and the 12h degradation rate was 27.9％.All properties of polyurethane foam were improved to a certain extent.
extract of cotton spinning black liquorpolyurethane foamthermal stabilityflame retardancydegradability
万方数据
维普
