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首页> 外文期刊>Colloids and Interfaces >Synthesis of Submicrocontainers with a??Greena?? Biocide and Study of Their Antimicrobial Activity
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Synthesis of Submicrocontainers with a??Greena?? Biocide and Study of Their Antimicrobial Activity

机译：用“ Greena”合成亚微容器杀菌剂及其抗菌活性的研究

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The synthesis and properties of submicrocontainers with a shell of nanoparticles of silicon dioxide and a core of polymerized 3-(Trimethoxysilyl) propyl methacrylate loaded with 5-Dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT) are considered. The resulting containers were characterized by scanning electron microscopy SEM, laser correlation spectroscopy and thermogravimetric analysis. The obtained submicrocontainers show low polydispersity with a small increase in size in comparison with the initial droplet size of the Pickering emulsion. The Zeta potential of the final containers was sufficiently negative at pH7 to be stable. The maximum release of encapsulated biocide was observed over approximately 24a??27 h with a lease of about 78% of the encapsulated biocide during 3.5 h. The effectiveness of the encapsulated biocide by the Pickering emulsion technique was studied by tests on the growth rate of a microfungi colony (Aspergillus niger, Aspergillus awamori) and the growth rate of the bacteria Bacillus cereus. The test shows that the submicrocontainers of DCOIT facilitate a growth inhibition of 70% against 52% for the free biocide after 5 days; this is due to the fact that free biocide loses its activity promptly, while the encapsulated biocide is released gradually, and thus retains its effectivity for a longer time.
机译：考虑了具有二氧化硅纳米颗粒壳和负载了5-二氯-2-正辛基-4-异噻唑啉-3-one（DCOIT）的甲基丙烯酸3-（三甲氧基甲硅烷基）丙酯的核的亚微容器的合成和性能。所得容器通过扫描电子显微镜SEM，激光相关光谱法和热重分析进行表征。与Pickering乳液的初始液滴尺寸相比，所获得的亚微容器显示出低的多分散性且尺寸增加很小。最终容器的Zeta电位在pH7下足够负以稳定。在约24a·27h内观察到包封的杀生物剂的最大释放，在3.5小时内有约78％的包封的杀生物剂。通过测试微真菌菌落（黑曲霉，泡盛曲霉）的生长速率和蜡样芽孢杆菌的生长速率，研究了通过Pickering乳化技术包封的杀菌剂的有效性。该测试表明，DCOIT的亚微容器在5天后可促进70％的生长抑制，而游离生物杀伤剂的生长抑制为52％。这是由于以下事实：游离的杀生物剂迅速失去其活性，而被包封的杀生物剂逐渐释放，因此保持其有效性更长的时间。

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