Cellulose acetate‐based composites with antimicrobial properties from embedded molybdenum trioxide particles
Cellulose acetate‐based composites with antimicrobial properties from embedded molybdenum trioxide particles
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DOI：
10.1111/lam.12670
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发表时间：
2017-01
影响因子：
2.4
通讯作者：
S. Shafaei;Jörg Dörrstein;Josef-Peter Guggenbichler;C. Zollfrank
中科院分区：
文献类型：
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作者：
S. Shafaei;Jörg Dörrstein;Josef-Peter Guggenbichler;C. Zollfrank
本研究的目的是通过嵌入具有独特的高比表面积的三氧化钼颗粒来开发具有优异抗菌活性的新型醋酸酯纤维素(生物聚合物)复合材料。以新鲜沉淀的二水合三氧化钼(MoO_3·2H_2O)为原料，在氢气/氮气气氛下于340℃下焙烧，制得高比表面积的三氧化钼颗粒。采用滚筒法对金黄色葡萄球菌、大肠埃希菌和铜绿假单胞菌进行了微生物学评价，发现包埋有高比表面积的无水三氧化二钼具有良好的抗菌活性。由MoO_3颗粒组成的醋酸酯纤维素复合材料可以消除三种有害细菌，这是由于质子从材料中释放出来，以及三氧化钼颗粒表面的膨胀。这一发现支持所提出的基于大比表面积导致局部酸度增加的抗菌机制。
The objective of this research was to develop novel cellulose acetate (biopolymer) composite materials with an excellent antimicrobial activity by embedding molybdenum trioxide particles with unique high specific surface area. High surface area molybdenum trioxide particles were prepared from freshly precipitated molybdenum trioxide dihydrate (MoO3·2H2O) and subsequent calcination at 340°C under H2/N2 gas. Microbiological evaluation against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa were performed applying a roll‐on test and excellent antimicrobial activities were determined for composites with embedded anhydrous molybdenum trioxide with a high specific surface area. Cellulose acetate composites comprising MoO3 particles can eliminate three harmful bacteria as a result of the release of protons from the material and surface enlargement of the molybdenum trioxide particles. The findings support a proposed antimicrobial mechanism based on local acidity increase due to large specific surface areas.