Stabilized nanosilver based antimicrobial poly(3-hydroxybutyrate-co-3-hydroxyvalerate) nanocomposites of interest in active food packaging
Stabilized nanosilver based antimicrobial poly(3-hydroxybutyrate-co-3-hydroxyvalerate) nanocomposites of interest in active food packaging
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DOI：
10.1016/j.ifset.2015.10.019
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发表时间：
2016-02-01
影响因子：
6.6
通讯作者：
Lagaron, J. M.
中科院分区：
文献类型：
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作者：
Castro-Mayorga, J. L.;Fabra, M. J.;Lagaron, J. M.
合成了3-羟基丁酸-3-羟基戊酸共聚物纳米复合抗菌银。对于合成，使用在基于混合微生物培养物的聚（3-羟基丁酸酯-共-18摩尔%-3-羟基戊酸酯）（PHBV 18）中产生的原位稳定的银纳米颗粒（AgNP）的母料，其通过与商业聚（3-羟基丁酸酯-共-3摩尔%-3-羟基戊酸酯）（PHBV 3）材料熔融配混来稀释。掺入的AgNP（0.04重量%）导致令人惊讶的氧渗透率下降约10%。56%，与纯聚合物相比。与纯PHBV 3相比，纳米复合材料的热稳定性和光学性质没有显著改变。此外，PHBVs-AgNP膜对两种最常见的食源性病原体肠道沙门氏菌和单核细胞增生李斯特菌的抗微生物性能显示出强烈且持续的（甚至在七个月后）抗菌活性。这项研究提供了一种创新的路线，以产生完全可再生和可生物降解的抗菌纳米复合材料，可能是潜在的兴趣，在薄膜和涂料应用，如积极的食品包装。为了响应消费者对更安全食品和环保包装材料的需求，这项工作提出了一种新的方法，通过使用从工业食品中获得的可生物降解材料来开发抗菌包装，结合工业上有意义的熔融共混工艺生产产品。这里应用的方法允许在聚合物基质中使用低剂量的稳定的银纳米颗粒，而没有添加剂，其表现出针对食源性病原体的延长的抗微生物活性和增强的氧气阻隔性能。这些材料在可生物降解的活性食品包装材料和抗菌食品接触表面的开发和设计中具有极大的兴趣，其额外的优点是它们可以容易地按比例放大。(C)2015爱思唯尔有限公司版权所有。
Antimicrobial silver based nanocomposites of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) were successfully synthesized and characterized. For the synthesis, a masterbatch of in situ stabilized silver nanoparticles (AgNPs) produced into a mixed microbial cultures based poly(3-hydroxybutyrate-co-18 mol%-3-hydroxyvalerate) (PHBV18) was used, which was diluted by melt compounding with a commercial poly(3-hydroxybutyrate-co-3 mol%-3-hydroxyvalerate) (PHBV3) material. The incorporated AgNPs (0.04 wt.%) led to a surprising oxygen permeability drop of ca. 56% compared to the neat polymer. The thermal stability and optical properties of the nanocomposites were not significantly modified as compared to the neat PHBV3. Moreover, the antimicrobial performance of the PHBVs-AgNPs films against two of the most common food borne pathogens, Salmonella enterica and Listeria monocytogenes, showed a strong and sustained (even after seven-months) antibacterial activity. This study provides an innovative route to generate fully renewable and biodegradable antimicrobial nanocomposites that could potentially be of interest in film and coating applications such as active food packaging.Industrial relevance: As a response to the consumers for more safety foodstuffs and ecofriendly packaging materials, this work presents a novel methodology to develop antimicrobial packaging by using biodegradable materials obtained from industrial food by-products in combination of an industrially meaningful melt blending process. The methodology here applied allows the use of low doses of stabilized silver nanoparticles in the polymer matrix, without additives, which exhibits prolonged antimicrobial activity against food borne pathogens and enhanced oxygen barrier properties. These materials are of great interest in the development and design of biodegradable active food packaging materials and antibacterial food contact surfaces with the additional advantage that they can be easily scale-up. (C) 2015 Elsevier Ltd. All rights reserved.