摘要
Abstract
The extraction of natural brown pigment from chestnut shell by ethanol was studied. The optimal conditions through the orthogonal test were found as follows: the extraction time 2.5 h, extraction temperature 75℃, the ethanol concentration 40%, solidliquid ratio 1 : 20. The extraction rate of brown pigment was 5.52%. In addition, the result of the study of its related properties showed: brown pigment was soluble in water, ethanol, methanol and insoluble in benzene, acetone, ethyl acetate, etc; brown pigment in aqueous solution was good at light and heat resistance, anti-oxidation and anti-reducibility; metal ions such as Ca2+, Mg2+, Zn2+, Ba2+, Na+, K+ didn't affect the pigment color significantly. However, Fe3+, Pb2+, Cu2+ could react with the pigment with sedimentation and decolored appeared.关键词
板栗壳/棕色素/提取,相关性质Key words
Chestnut shell/Brown pigment/Extraction/Related properties分类
轻工纺织
