N-chloro-hindered amines as multifunctional polymer additives
N-chloro-hindered amines as multifunctional polymer additives
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DOI：
10.1021/ma050874b
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发表时间：
2005-09-20
期刊：
影响因子：
5.5
通讯作者：
Sun, YY
中科院分区：
文献类型：
--
作者：
Chen, ZB;Sun, YY
受阻胺光稳定剂（HALS）是聚合物材料中最重要的光/热稳定剂之一。它们以低成本和低毒性广泛获得，并且它们与广泛的商业上重要的聚合物材料具有优异的相容性。1-7大多数HALS含有哌啶结构，可以进一步化学修饰以实现不同的功能。在氯化剂存在下，HALS可以转化为N-氯位阻胺（NCHAs）。例如，Zakrzewski报告说，可以在苯中使用二氯异氰尿酸钠作为氯化剂来制备NCHA。8后来，Nishimoto和同事在甲苯中在次氯酸叔丁酯的存在下合成了NCHA。9然而，迄今为止，尚未对国家人道主义援助机构的业绩进行充分调查。在我们开发抗微生物聚合物的持续努力中，评价了10-13种NCHA作为抗微生物剂的潜在候选物。我们发现，哌啶基HALS可以很容易地转化为NCHAs在稀释的次氯酸钠漂白剂，显着简化了制备过程。NCHAs可以同时提供抗菌功能以及光稳定性和热稳定性。
Hindered amine light stabilizers (HALSs) are one of the most important light/thermal stabilizing agents of polymeric materials. They are widely available with low cost and low toxicity, and they have excellent compatibilities with a broad range of commercially significant polymeric materials. 1-7 Most HALSs contain piperidine structures, which can be further chemically modified to achieve different functions. In the presence of chlorinating agents, it is possible to transform HALSs into N-chloro-hindered amines (NCHAs). For example, Zakrzewski reported that NCHAs could be prepared in benzene using sodium dichloroisocyanurate as chlorinating agent. 8 Later, Nishimoto and co-workers synthesized NCHAs in toluene with the presence of tert-butyl hypochlorite. 9 However, to date, the performances of NCHAs have not been fully investigated. In our continuing effort in the development of antimicrobial polymers, 10-13 NCHAs were evaluated as potential candidates of antimicrobial agents. We found that piperidine-based HALSs could be readily transformed into NCHAs in diluted sodium hypochlorite bleach, significantly simplifying the preparation processes. NCHAs could simultaneously provide antimicrobial functions as well as photostabilities and thermal stabilities.