以L天冬氨酸为单体进行缩聚反应所得到的高分子量聚琥珀酰亚胺(PSI)为母体,己二胺为交联荆,采用乙醇胺对其进行改性,制备了羟化聚天冬氨酸水凝胶.研究了反应温度、交联剂及乙醇胺用量对水凝胶溶胀性能的影响;以水杨酸为模型药物,研究了其载药性能及在不同释放介质中的释放行为.结果表明,反应温度为40℃,交联剂用量为PSI用量的7%时水凝胶的溶胀性能最好.随着乙醇胺用量的增加,水凝胶在乙醇溶液中的溶胀倍率增加,当乙醇胺与PSI的物质的量比为0.5:1时,溶胀倍率可达到145倍,载药量由最初的4.23 mg提高到29.92 mg.
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