期刊
APPLIED CLAY SCIENCE
卷 150, 期 -, 页码 138-146出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.clay.2017.09.023
关键词
Halloysite; Functionalization; Metal ions; CMC; Nanocomposite films
资金
- Agriculture Research Center program of the Ministry of Agriculture, Food and Rural Affairs, Republic of Korea [ARC 710003]
Halloysite nanotubes (Hal) were treated with acid to prepare uniformly charged acid treated Hal (Hal-A). After acid treatment, the surface charge (zeta potential) of Hal changed from + 0.08 mV to -32.65 mV. Functionalized Hal-A were prepared through adsorbing metal ions by immersing the Hal-A into saturated solutions of three different metal salts, silver nitrate, zinc nitrate, and copper acetate. The number of metal ions attached to the Hal-A and their functionality were dependent on the type of metal ions. The ftmctionalized Hal-A exhibited strong antimicrobial activity against food-borne pathogenic bacteria, L. monocytogenes and E. colt The CMC-based film showed a significant increase in mechanical, water vapor barrier, and thermal stability properties after forming a composite with Hal. In particular, CMC-based films incorporated with the functionalized Hal-A showed strong antimicrobial activity against both L. monocytogenes and E. coli.
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