Institute of Polymer Science, University of Ulm, Ulm D-89081, Germany.
J Phys Chem B. 2009 Nov 12;113(45):14849-53. doi: 10.1021/jp901255c.
Composite agarose hydrogels with embedded tetradecane emulsions stabilized by cetylpyridinium chloride were studied. The absorption efficiency of 4-nitrophenyl ethers of carbonic acids by the composite agarose gels increases with the length of the hydrocarbon tail of the ester. The diffusion rate of amphiphilic substances in the composite gels was demonstrated to be much less that than in the standard agarose gels. The reaction kinetics between the esters and dodecylmercaptan dissolved in tetradecane droplets of composite hydrogel was studied. In the region of physiological pH, the reactivity of SH groups embedded in the composite agarose gel in the reaction with the esters is significantly higher than that in a homogeneous solution. Hydrogels with embedded emulsion droplets are of considerable practical importance as drug delivery systems, microreactors, and absorbers. Composite gels filled with emulsions incorporating lipophilic mercaptanes are effective absorbers of heavy metal ions.
研究了嵌入十四烷乳液的复合琼脂糖水凝胶，该乳液由氯化十六烷基吡啶稳定。羧酸对硝基苯酯在复合琼脂糖凝胶中的吸收效率随酯的碳氢尾链长度的增加而增加。在复合凝胶中，两亲物质的扩散速度明显低于标准琼脂糖凝胶。研究了复合水凝胶中十四烷液滴中溶解的酯和十二硫醇之间的反应动力学。在生理 pH 范围内，嵌入复合琼脂糖凝胶中的 SH 基团在与酯的反应中的反应性明显高于均相溶液中的反应性。作为药物输送系统、微反应器和吸收剂，嵌入乳液液滴的水凝胶具有重要的实际意义。填充有包含亲脂性巯基的乳液的复合凝胶是重金属离子的有效吸收剂。
