期刊
ACS APPLIED POLYMER MATERIALS
卷 3, 期 4, 页码 2045-2053出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.1c00101
关键词
silicone foam; surfactant-free; thiol oxidation; bleach delivery; disulfide cleavage
资金
- Natural Sciences and Engineering Research Council of Canada
- Chinese Scholarship Council
This study demonstrates a method to prepare bleach-containing elastomeric sponges using thiopropyl-modified silicone oils, which can release excess bleach to gradually oxidize organic molecules in aqueous solution. The preparation process is simple and sustainable.
Topical disinfection protocols to inactivate organisms, particularly on high contact surfaces, have become increasingly important. A classical oxidative agent, sodium hypochlorite (bleach), has many benefits, but can be problematic during applications because of its ability to oxidize the organic polymers in which it is contained. We demonstrate that bleach-containing elastomeric sponges are readily created in one step at room temperature from thiopropyl-modified silicone oils; sodium hypochlorite induces disulfide cross-linking and a foam structure due, in part, to the concomitant formation of sulfonates. No surfactants are required. The morphology of the bleach-containing silicone sponge is tunable by the aqueous bleach solution concentration and the water/silicone ratio used. The resulting silicone sponge contains excess bleach that can be released gradually, as shown by its ability to oxidize organic molecules in aqueous solution, either directly or after dehydration/rehydration; the latter process provides a way to store the bleach-containing material in dry form. Such foams exhibit enhanced sustainability as, we show, they can be converted back to thiopropylsilicone oils by reduction using hydrosilicones. The resulting oils can be re-cross-linked, completing the life cycle.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据