Long-term antimicrobial polyamide 6/silver-nanocomposites
Long-term antimicrobial polyamide 6/silver-nanocomposites
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DOI：
10.1007/s10853-006-1158-5
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发表时间：
2007-08-01
影响因子：
4.5
通讯作者：
Roesch, Alfons
中科院分区：
文献类型：
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作者：
Damm, Cornelia;Muensted, Helmut;Roesch, Alfons
在聚酰胺6（PA 6）/醋酸银混合物的熔融加工过程中，通过银离子的热还原在PA 6中生成单质银纳米粒子。填充2 wt%纳米银的PA 6中银离子的释放在至少100天内服从零级速率定律。在此期间，每升浸液和每平方厘米样品表面每天释放约17微克银。PA 6/Ag纳米复合材料被证明对大肠杆菌有活性，而纯PA 6没有显示出任何抗菌功效。将含有2重量%银的纳米复合材料浸入水中100天不会降低其对大肠杆菌的抗微生物功效。因此，填充有2wt%纳米银的PA 6是长期应用的有效抗菌材料。
Elemental silver nanoparticles were generated in polyamide 6 (PA6) by the thermal reduction of silver ions during the melt processing of a PA6/silver acetate mixture. The silver ion release from PA6 filled with 2 wt% nanosilver obeys a zero-order rate law for at least 100 days. During this time about 17 mu g silver per day, per litre immersion liquid and per cm(2) sample surface are released. The PA6/Ag-nanocomposite was shown to be active against Escherichia coli whereas the pure PA6 did not show any antimicrobial efficacy. Immersion of a nanocomposite containing 2 wt% silver in water for 100 days does not reduce its antimicrobial efficacy against Escherichia coli. Thus PA6 filled with 2 wt% nanosilver is an effective antimicrobial material for long-term applications.