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Open AccessArticle

Synthesis of Submicrocontainers with “Green” Biocide and Study of Their Antimicrobial Activity

1
Industrial Engineering Department, Kazakh National Research Technical University after K. Satpayev, Almaty 050013, Kazakhstan
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Department of Science and Innovation, Kazakh-British Technical University, Almaty 050000, Kazakhstan
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Biotechnology Department, M. Auezov South Kazakhstan State University, Shymkent 160012, Kazakhstan
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Chemical Technologies of Inorganic Chemistry Department, M. Auezov South Kazakhstan State University, Shymkent 160012, Kazakhstan
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Department of Chemical Engineering, University of Chemistry and Technology Prague, 166 28, 6 Prague, Czech Republic
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Fraunhofer Institute for Applied Polymer Research, D-14476 Potsdam, Germany
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Max Planck Institute of Colloids and Interfaces, D-14476 Potsdam-Golm, Germany
*
Author to whom correspondence should be addressed.
Colloids Interfaces 2018, 2(4), 67; https://doi.org/10.3390/colloids2040067
Received: 27 September 2018 / Revised: 27 November 2018 / Accepted: 28 November 2018 / Published: 3 December 2018
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 24–27 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. View Full-Text
Keywords: Pickering emulsion; submicrocontainers; microencapsulation; antifouling; biocide; release; antimicrobial activity; growth inhibition Pickering emulsion; submicrocontainers; microencapsulation; antifouling; biocide; release; antimicrobial activity; growth inhibition
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Aidarova, S.B.; Sharipova, A.A.; Issayeva, A.B.; Mutaliyeva, B.Z.; Tleuova, A.B.; Grigoriev, D.O.; Kudasova, D.; Dzhakasheva, M.; Miller, R. Synthesis of Submicrocontainers with “Green” Biocide and Study of Their Antimicrobial Activity. Colloids Interfaces 2018, 2, 67.

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