Preparation and Antimicrobial Properties of Gemini Surfactant-Supported Triiodide Complex System
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- 作者：Shuai He ; Biqing Wang ; Honglin Chen ; Chongli Tang ; Yujun Feng
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2012
- 出版时间：April 25, 2012
- 年：2012
- 卷：4
- 期：4
- 页码：2116-2123
- 全文大小：413K
- 年卷期：v.4,no.4(April 25, 2012)
- ISSN：1944-8252
文摘
Iodine is an effective, simple, and inexpensive bactericide in disinfection. However, the poor solubility and stability of iodine in water limit its applications. In addition, the active iodine content in the commercial iodophors is quite low, and the reported triiodide complex is unstable. In this work, a long-term stable triiodide complex antimicrobial system was prepared by mixing iodine and a cationic gemini surfactant into lauryldimethylamine oxide (LDAO) aqueous solution, and its stability was examined by means of UV鈥搗is spectrophotometry. It was found that the content of LDAO, cationic gemini surfactant and H2SO4 played crucial roles in stabilizing antimicrobial system, and the active iodine (i.e., triiodide complex) content of the optimum formulation can remain stable for 150 days, as iodine is encapsulated by the mixed vesicles assembled by the protonated LDAO and the added gemini surfactant. However, the active iodine reduced rapidly when NaCl was added or the pH was increased in the environment. Furthermore, the antimicrobial efficacy of the optimized formulation was studied against Candida albicans, and more than 4 log reduction in viable cell after 5 min of contact was obtained.