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投稿时间:2010-09-30
投稿时间:2010-09-30
中文摘要: 采用三聚磷酸钠(TPP)和六偏磷酸钠(SHMP)为复合交联剂,制备了离子交联网络结构的壳聚糖水凝胶微球。分析讨论了交联剂质量配比、pH以及离子强度等对壳聚糖微球溶胀性能的影响。结果表明:使用复合交联剂制备的微球的溶胀度比单独使用TPP或SHMP的分别低62.4%和41.3%,交联效率得到明显提高;当m(TPP)∶m(SHMP)=3∶5,交联剂pH=5时,制备的微球交联程度最好,结构最密实;在pH=1.2的缓冲溶液中,溶胀度可达到357%,而且凝胶没有任何破碎。微球具有较好的离子强度和pH敏感性,在酸性介质中有较高的溶胀度。
Abstract:Chitosan gel beads were prepared using sodium tripolyphosphate (TPP) and sodium hexametaphosphate (SHMP) composite as cross linking agents. The influence of mass ratio of cross linking agents, pH value and ionic strength on swelling properties of chitosan gel beads are discussed. According to the results, composite cross linking agent can decrease the swelling degree by 62.4% and 41.3% in comparison with TPP or SHMP alone, respectively, and increase the ionic crosslinking efficiency. The most compact chitosan beads can be obtained when m(TPP)∶m(SHMP)=3∶5 and pH=5. The swelling degree can reach up to 357% when cured in pH=1.2 buffer solution. The beads have good ionic strength and pH sensitivity and high swelling degree in acidic media.
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作者 | 单位 | |
易文清 | 郑州大学材料科学与工程学院,郑州 450001 | Wenqing8668@163.com |
李新法 | 郑州大学材料科学与工程学院,郑州 450002 | |
陈金周 | 郑州大学材料科学与工程学院,郑州 450003 | |
牛明军 | 郑州大学材料科学与工程学院,郑州 450004 |
引用本文:
易文清,李新法,陈金周,牛明军.壳聚糖水凝胶微球的制备与溶胀性能[J].功能高分子学报,2010,23(4):400-404.
YI Wen-qing,LI Xin-fa,CHEN Jin-zhou,NIU Ming-jun.Preparation and Swelling Properties of Chitosan Hydrogel Beads[J].Journal of Functional Polymers,2010,23(4):400-404.
易文清,李新法,陈金周,牛明军.壳聚糖水凝胶微球的制备与溶胀性能[J].功能高分子学报,2010,23(4):400-404.
YI Wen-qing,LI Xin-fa,CHEN Jin-zhou,NIU Ming-jun.Preparation and Swelling Properties of Chitosan Hydrogel Beads[J].Journal of Functional Polymers,2010,23(4):400-404.