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Open AccessArticle

Preparation of the Hybrids of Hydrotalcites and Chitosan by Urea Method and Their Antimicrobial Activities

1
Biotechnology Institute, College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
2
School of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, China
3
College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(10), 1588; https://doi.org/10.3390/polym11101588
Received: 30 August 2019 / Revised: 19 September 2019 / Accepted: 24 September 2019 / Published: 28 September 2019
(This article belongs to the Special Issue Antimicrobial Polymer-Based Materials for Food Packaging Applications)
Hybrid nano-supra molecular structured materials can boost the functionality of nano- or supra-molecular materials by providing increased reactivity and conductivity, or by simply improving their mechanical stability. Herein, the studies in materials science exploring hybrid systems are investigated from the perspective of two important related applications: healthcare and food safety. Interfacing phase strategy was applied, and ZnAl layered double hydroxide-chitosan hybrids, prepared by the urea method (U-LDH/CS), were successfully synthesized under the conditions of different chitosan(CS) concentrations with a Zn/Al molar ratio of 5.0. The structure and surface properties of the U-LDH/CS hybrids were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectrometer(FTIR), scanning electronmicroscopy (SEM), ultravioletvisible (UV-Vis), and zero point charge (ZPC) techniques, where the effect of CS concentration on the structure and surface properties was investigated. The use of the U-LDH/CS hybrids as antimicrobial agents against Escherichia coli, Staphylococcus aureus, and Penicillium cyclopium was investigated in order to clarify the relationship between microstructure and antimicrobial ability. The hybrid prepared in a CS concentration of 1.0 g∙L−1 (U-LDH/CS1) exhibited the best antimicrobial activity and exhibited average inhibition zones of 24.2, 30.4, and 22.3mm against Escherichia coli, Staphylococcus aureus, and Penicillium cyclopium, respectively. The results showed that the appropriate addition of CS molecules could increase antimicrobial ability against microorganisms. View Full-Text
Keywords: chitosan; ZnAl hydroxide; hybrid; urea method; chitosan amount; antimicrobial activity chitosan; ZnAl hydroxide; hybrid; urea method; chitosan amount; antimicrobial activity
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MDPI and ACS Style

Gohi, B.F.C.A.; Zeng, H.-Y.; Cao, X.-J.; Zou, K.-M.; Shuai, W.; Diao, Y. Preparation of the Hybrids of Hydrotalcites and Chitosan by Urea Method and Their Antimicrobial Activities. Polymers 2019, 11, 1588.

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