应用化学

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硫脲壳聚糖微量银配合物的制备及抑菌活性

孙新枝*,马传利   

  1. (青岛农业大学化学与药学院 青岛 266109)
  • 收稿日期:2012-08-17 修回日期:2012-10-21 出版日期:2013-06-10 发布日期:2013-06-10
  • 通讯作者: 孙新枝,讲师; Tel:0532-86080954; Fax:0532-86080894; E-mail:sunxinzhi616@sina.com; 研究方向:壳聚糖的改性及衍生物的保鲜、抑菌等

Preparation and Antimicrobial Activity of Thiourea Chitosan-Ag+ Complex

SUN Xinzhi*, MA Chuanli   

  1. (College of Chemistry and Pharmaceutical Sciences,Qingdao Agricultural University,Qingdao 266109,China)
  • Received:2012-08-17 Revised:2012-10-21 Published:2013-06-10 Online:2013-06-10
  • Contact: Xinzhi SUN

摘要: 由硫脲壳聚糖和微量的AgNO3反应得到硫脲壳聚糖Ag+配合物。 通过红外光谱对其结构进行了表征。 研究了壳聚糖、硫脲壳聚糖、硫脲壳聚糖-Ag+配合物及AgNO3对大肠杆菌和金黄葡萄球菌的抑菌活性,并测定了其最低抑菌浓度(MIC)和最低杀菌浓度(MBC)。 结果表明,硫脲壳聚糖-Ag+配合物的抑菌活性强于壳聚糖和硫脲壳聚糖,且其MIC和MBC均为100 mg/L(游离Ag+含量为0.032 mg/L),低于AgNO3的MIC和MBC(均为120 mg/L)。

关键词: 壳聚糖, 硫脲壳聚糖, 抑菌活性, 微量Ag+

Abstract: Thiourea(TU) chitosan(CTS)-Ag+ complex was prepared by the reaction of thiourea chitosan with a trace amount of silver ion in homogeneous solution, and was characterized by FT-IR. Antimicrobial activities of CTS, TU-CTS, TU-CTS-Ag+ complex and AgNO3 were evaluated against E.coli and S.aureus in vitro, and the minimum inhibition concentration(MIC) and the minimum bactericidal concentration(MBC) were determined. The results show that the complex has stronger antimicrobial activities than chitosan and thiourea chitosan. The MIC and MBC of thiourea chitosan Ag+ complex are both 100 mg/L(free silver ion content 0.032 mg/L), lower than the MIC and MBC for AgNO3, which are both 120 g/L.

Key words: chitosan, thiourea chitosan, antimicrobial activity, trace amounts of silver iron

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