One-Step Synthesis of Self-Stratification Core-Shell Latex for Antimicrobial Coating
Herein, we describe a one-step method for synthesizing cationic acrylate-based core-shell latex (CACS latex), which is used to prepare architectural coatings with excellent antimicrobial properties. Firstly, a polymerizable water-soluble quaternary ammonium salt (QAS-BN) was synthesized using 2-(Dim...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/6/2795 |
| _version_ | 1797609850037862400 |
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| author | Guanzhou Zhen Yuanchun Mu Peichen Yuan Yankun Li Xiaoyu Li |
| author_facet | Guanzhou Zhen Yuanchun Mu Peichen Yuan Yankun Li Xiaoyu Li |
| author_sort | Guanzhou Zhen |
| collection | DOAJ |
| description | Herein, we describe a one-step method for synthesizing cationic acrylate-based core-shell latex (CACS latex), which is used to prepare architectural coatings with excellent antimicrobial properties. Firstly, a polymerizable water-soluble quaternary ammonium salt (QAS-BN) was synthesized using 2-(Dimethylamine) ethyl methacrylate (DMAEMA) and benzyl bromide by the Hoffman alkylation reaction. Then QAS-BN, butyl acrylate (BA), methyl methacrylate (MMA), and vinyltriethoxysilane (VTES) as reactants and 2,2’-azobis(2-methylpropionamidine) dihydrochloride (AIBA) as a water-soluble initiator were used to synthesize the CACS latex. The effect of the QAS-BN dosage on the properties of the emulsion and latex film was systematically investigated. The TGA results showed that using QAS-BN reduced the latex film’s initial degradation temperature but improved its thermal stability. In the transmission electron microscopy (TEM) photographs, the self-stratification of latex particles with a high dosage of QAS-BN was observed, forming a core-shell structure of latex particles. The DSC, TGA, XPS, SEM, and performance tests confirmed the core-shell structure of the latex particles. The relationship between the formation of the core-shell structure and the content of QAS-BN was proved. The formation of the core-shell structure was due to the preferential reaction of water-soluble monomers in the aqueous phase, which led to the aggregation of hydrophilic groups, resulting in the formation of soft-core and hard-shell latex particles. However, the water resistance of the films formed by CACS latex was greatly reduced. We introduced a p-chloromethyl styrene and n-hexane diamine (p-CMS/EDA) crosslinking system, effectively improving the water resistance in this study. Finally, the antimicrobial coating was prepared with a CACS emulsion of 7 wt.% QAS-BN and 2 wt.% p-CMS/EDA. The antibacterial activity rates of this antimicrobial coating against <i>E. coli</i> and <i>S. aureus</i> were 99.99%. The antiviral activity rates against H<sub>3</sub>N<sub>2</sub>, HCoV-229E, and EV71 were 99.4%, 99.2%, and 97.9%, respectively. This study provides a novel idea for the morphological design of latex particles. A new architectural coating with broad-spectrum antimicrobial properties was obtained, which has important public health and safety applications. |
| first_indexed | 2024-03-11T06:07:18Z |
| format | Article |
| id | doaj.art-5cf2409221074af0a3f9c0398e24aae8 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T06:07:18Z |
| publishDate | 2023-03-01 |
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| series | Molecules |
| spelling | doaj.art-5cf2409221074af0a3f9c0398e24aae82023-11-17T12:55:20ZengMDPI AGMolecules1420-30492023-03-01286279510.3390/molecules28062795One-Step Synthesis of Self-Stratification Core-Shell Latex for Antimicrobial CoatingGuanzhou Zhen0Yuanchun Mu1Peichen Yuan2Yankun Li3Xiaoyu Li4Beijing Engineering Research Center of Synthesis and Application of Waterborne Polymer, Beijing University of Chemical Technology, Beijing 100029, ChinaBeijing Engineering Research Center of Synthesis and Application of Waterborne Polymer, Beijing University of Chemical Technology, Beijing 100029, ChinaBeijing Engineering Research Center of Synthesis and Application of Waterborne Polymer, Beijing University of Chemical Technology, Beijing 100029, ChinaBeijing Engineering Research Center of Synthesis and Application of Waterborne Polymer, Beijing University of Chemical Technology, Beijing 100029, ChinaBeijing Engineering Research Center of Synthesis and Application of Waterborne Polymer, Beijing University of Chemical Technology, Beijing 100029, ChinaHerein, we describe a one-step method for synthesizing cationic acrylate-based core-shell latex (CACS latex), which is used to prepare architectural coatings with excellent antimicrobial properties. Firstly, a polymerizable water-soluble quaternary ammonium salt (QAS-BN) was synthesized using 2-(Dimethylamine) ethyl methacrylate (DMAEMA) and benzyl bromide by the Hoffman alkylation reaction. Then QAS-BN, butyl acrylate (BA), methyl methacrylate (MMA), and vinyltriethoxysilane (VTES) as reactants and 2,2’-azobis(2-methylpropionamidine) dihydrochloride (AIBA) as a water-soluble initiator were used to synthesize the CACS latex. The effect of the QAS-BN dosage on the properties of the emulsion and latex film was systematically investigated. The TGA results showed that using QAS-BN reduced the latex film’s initial degradation temperature but improved its thermal stability. In the transmission electron microscopy (TEM) photographs, the self-stratification of latex particles with a high dosage of QAS-BN was observed, forming a core-shell structure of latex particles. The DSC, TGA, XPS, SEM, and performance tests confirmed the core-shell structure of the latex particles. The relationship between the formation of the core-shell structure and the content of QAS-BN was proved. The formation of the core-shell structure was due to the preferential reaction of water-soluble monomers in the aqueous phase, which led to the aggregation of hydrophilic groups, resulting in the formation of soft-core and hard-shell latex particles. However, the water resistance of the films formed by CACS latex was greatly reduced. We introduced a p-chloromethyl styrene and n-hexane diamine (p-CMS/EDA) crosslinking system, effectively improving the water resistance in this study. Finally, the antimicrobial coating was prepared with a CACS emulsion of 7 wt.% QAS-BN and 2 wt.% p-CMS/EDA. The antibacterial activity rates of this antimicrobial coating against <i>E. coli</i> and <i>S. aureus</i> were 99.99%. The antiviral activity rates against H<sub>3</sub>N<sub>2</sub>, HCoV-229E, and EV71 were 99.4%, 99.2%, and 97.9%, respectively. This study provides a novel idea for the morphological design of latex particles. A new architectural coating with broad-spectrum antimicrobial properties was obtained, which has important public health and safety applications.https://www.mdpi.com/1420-3049/28/6/2795core-shell structurequaternary ammonium saltsilicone acrylate emulsionantibacterial propertyantiviral property |
| spellingShingle | Guanzhou Zhen Yuanchun Mu Peichen Yuan Yankun Li Xiaoyu Li One-Step Synthesis of Self-Stratification Core-Shell Latex for Antimicrobial Coating Molecules core-shell structure quaternary ammonium salt silicone acrylate emulsion antibacterial property antiviral property |
| title | One-Step Synthesis of Self-Stratification Core-Shell Latex for Antimicrobial Coating |
| title_full | One-Step Synthesis of Self-Stratification Core-Shell Latex for Antimicrobial Coating |
| title_fullStr | One-Step Synthesis of Self-Stratification Core-Shell Latex for Antimicrobial Coating |
| title_full_unstemmed | One-Step Synthesis of Self-Stratification Core-Shell Latex for Antimicrobial Coating |
| title_short | One-Step Synthesis of Self-Stratification Core-Shell Latex for Antimicrobial Coating |
| title_sort | one step synthesis of self stratification core shell latex for antimicrobial coating |
| topic | core-shell structure quaternary ammonium salt silicone acrylate emulsion antibacterial property antiviral property |
| url | https://www.mdpi.com/1420-3049/28/6/2795 |
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