马占相思栲胶胶体化学性质与鞣性研究  

Colloid Chemistry and Tanning Properties of Acacia Manguim Tannin Extracts

作　　者：滕博[1] 龚英[1] 陈武勇[1] 

机构地区：[1]四川大学制革清洁技术国家工程实验室,四川成都610065

出　　处：《中国皮革》2010年第17期18-21,25,共5页China Leather

摘　　要：使用Zetasizernano ZS系列仪器,对马占相思栲胶的Zeta电位、粒径和电导率等胶体的化学性质进行了研究,并采用化学方法对其化学成分、吸着力、结合力和渗透速度等鞣制性能进行分析,且与缩合类落叶松、杨梅、坚木栲胶进行了对比。结果表明:随温度升高,马占相思栲胶Zeta电位和粒径变化幅度较小;随pH升高,Zeta电位绝对值增大幅度小;随溶液中NaCl浓度升高,粒径增大、Zeta电位绝对值下降程度,均小于其它3种栲胶。温度、pH、栲胶溶液中的NaCl浓度对其稳定性影响不大。马占相思栲胶电导率低于杨梅栲胶,单宁含量、吸着力与结合力均高于落叶松栲胶。pH值低于7时,渗透速度高于杨梅、坚木栲胶,并且pH值对其渗透速度影响较小;本研究可为马占相思栲胶的生产和应用提供有益参考。The colloidal chemistry properties of the Acacica Mangium extracts were investigated by using Zetasizer nano ZS instrument, including the Zeta potential, the particle size and the conductivity. Also, some of the tanning capabilities such as the chemical composition, the sorptivity, the binding capacity and the penetration were investigated with some chemical methods and compared with some other condensed extracts like, Larch, Bayberry and Quebracho. The results show that the Zeta potential abso- lute value and the particle size of the extracts increased little with a temperature and pH value increasing; the particle size and the Zeta potential increase least with the concentration of NaCl. As for the tannin properties, the sorptivity and the binding capacity of the extracts are higher than larch. And the penetration rate of the extracts changed little with a variation of pH and higher than Bayberry and Quebracho in the condition of pH value below 7. All of the results are helpful for the production and application of the extracts.

关 键 词：栲胶 马占相思树 单宁 胶体化学 鞣革 

分 类 号：TQ943[化学工程]