摘要
通过红外波谱、凝胶渗透色谱等方法测定了橡碗栲胶氧化降解产物的官能基、分子量及分 布，证明它是一类多元酚羧酸钠盐的混合体系，其分子量随氧化程度的增加而降低。研究了降 解产物的缓冲性能、与皮胶原的反应能力（收敛性）及在制革过程中作为中和复鞣剂的作用机 理。证明当氧化剂用量为 ２１％时，降解产物中分子量为 １８８～ ３２７的组分占 ８１． ２％， ３２８～ ７６０的 组分占１５，６％，这时产物具有极好的中和复鞣性能，可显著提高成革的质量。
The functional groups and molecular weight distributions of oxidization degradation products of valonea tannins were elucidated by IR and GPC analyses. Sodium poly-phenolcarboxylate structures of the degradated products were confirmed. Furthermore the buffering property, the reactivity with collagen (astringency) and the possibility of using the products as neutralizing retanning agent in leather-making were studied. It was observed that the product degradated by 21 % oxidizing agent, 96. 8% of which has molecular weight of 188 ~ 760, is of excellant neutralizing retanning agent for improving leather quality. The practical applications of the product was established.
出处
《精细化工》
EI
CAS
CSCD
北大核心
1999年第2期22-26,共5页
Fine Chemicals
基金
国家自然科学基金!(29576252)
国家教委博士点基金!(9561005)
关键词
皮革
橡碗栲胶
氧化
降解
中和复鞣剂
鞣剂
制革
leather chemicals
valonea tannin
oxidization degradation
neutralizing retanning agent
