A process for preparing a cross-linked polysaccharide comprises providing a polysaccharide with free carboxyl and hydroxyl groups capable of forming an intermolecular ester bond and cross-linking the polysaccharide by using onium salt, phosphonium salt, uronium salt or carbenium salt and in the presence or in the absence of organic base as cross-link reagent to obtain a highly cross-linked polysaccharide. The cross-linked polysaccharide has high cross-linking density and is stable and slowly biodegradable.
制备交联
多糖的方法包括提供具有能够形成分子间酯键的自由羧基和羟基的
多糖,并使用盐酸盐、
磷酸盐、
尿酸盐或
碳酸盐作为交联试剂,同时存在或不存在有机碱,以获得高度交联的
多糖。这种交联
多糖具有高交联密度,稳定且缓慢
生物降解。