栲胶改性做中和复鞣剂的研究  

Studies on Modification of Vegetable Tannin as Neutralizing_Retanning Agent

作　　者：田金平[1] 陈武勇[1] 陈萍[1] 张扬[1] 

机构地区：[1]四川大学皮革工程系,四川成都610065

出　　处：《皮革化工》1999年第5期14-18,共5页Leather Chemicals

基　　金：林业部科研基金

摘　　要：本论文的目的是对杨梅栲胶进行改性，使之适合于做中和复鞣剂，采用在含铝化合物存在下，重度亚硫酸化反应改性杨梅栲胶。研究了影响改性产物性质的一些参数，在缓冲性、中和性能、耐氧化能力、改性方法的重现性等方面对改性栲胶进行筛选，得出了在现有条件下的最佳改性方案，即按杨梅栲胶Ｗｇ，ＮａＨＳＯ３ ３０％ Ｗｇ，Ｎａ２ＳＯ３３６ ％ Ｗｇ，含铝化合物２％ Ｗｇ 及适量水的配比，在１２９ ℃，０ ．１６５ＭＰａ 下反应１０ｈ 得到改性产物ＴＣ，并对ＴＣ进行了表征及应用对比实验。研究结果表明：ＴＣ具有良好的中和能力和缓冲性，又具有一定的填充性；ＴＣ 的收敛性缓和，渗透迅速，能满足铬革中和复鞣剂的要求。For enlarging the utilization of Myrica rubra extract in leather making,an improved modification method_stronger sulfitation,with some alumiun compound coexisted,was used to modify this extract as neutralizing_retanning agent. In this thesis,a set of optimum modifying parameters was selected out,which is as following:Myrica rubra extract Wg,NaHSO 3 30% Wg,Na 2SO 3 36% Wg,Alumium compound 2% Wg and some water;the mixture was reacted at 129℃ and 0.165MPa for 10h,thus the neutralizing_retanning agent TC was got. Besides this,some properties of TC were also studied. It has been proved that TC is suitable for neutralizing_retanning agent because of its good meutralizing and buffering ability,filling ability,low astringency and fast penetrating speed.

关 键 词：改性 中和复鞣剂 中和 栲胶 制革 

分 类 号：TS529[轻工技术与工程—皮革化学与工程] TQ943.2[化学工程]