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Fabrication of flexible AgNW/cellulose hybrid film with heat preservation and antibacterial properties for agriculture application
Cellulose ( IF 5.7 ) Pub Date : 2021-07-25 , DOI: 10.1007/s10570-021-04097-x
Yu Chen 1 , Shuanghong Yang 1 , Zhiwei Qiu 1 , Fengxian Qiu 1 , Tao Zhang 1, 2 , Yuqi Li 3
Affiliation  

In the view of sustainable development and environmental protection, degradable agricultural films with on-demand thermal insulation properties have attracted growing research interest in the last few decades due to the deteriorating environment and extreme climate on the growth and existence of crops. Here, a general strategy has been developed to fabricate degradable silver nanowires modified cellulose (AgNW/cellulose) hybrid film with controllable thermal insulation and antibacterial properties by using plant cellulose and AgNWs as building blocks, PVA and PEG as film forming solvent, as well as their agriculture application. The results show that the AgNWs are evenly dispersed in the three-dimensional grid of cellulose, that they form a film that can withstand a certain tensile force and have good thermal stability. Due to the excellent electrical conductivity, the AgNW/cellulose hybrid films can provide excellent Joule heating, generating rapid thermal response and uniform electrical heating at a low supply voltage of 3 V. In the antibacterial tests against Escherichia coli and Staphylococcus aureus, the AgNW/cellulose hybrid films exhibited large diameters of inhibition zones, revealing the high antibacterial activity. Additionally, the AgNW/cellulose hybrid films showed highly stretchable behavior by delivering a breaking strain of 1.5% with a tensile stress of 0.45 MPa owing to the cross-linked structures of cellulose and AgNWs. Based on the above properties, this study not only provides a potential strategy for the fabrication of flexible and biodegradable agricultural films but also may provide new insights for agricultural thermal management.



中文翻译:

用于农业应用的具有保温和抗菌性能的柔性 AgNW/纤维素混合膜的制备

从可持续发展和环境保护的角度来看,由于环境恶化和极端气候对作物生长和生存的影响,具有按需隔热性能的可降解农膜在过去几十年中引起了越来越多的研究兴趣。在这里,已经开发了一种通用策略,通过使用植物纤维素和 AgNWs 作为构建单元,PVA 和 PEG 作为成膜溶剂,以及制备具有可控隔热和抗菌性能的可降解银纳米线改性纤维素(AgNW/纤维素)混合膜。他们的农业应用。结果表明,AgNWs 均匀地分散在纤维素的三维网格中,它们形成的薄膜可以承受一定的拉力并具有良好的热稳定性。由于优异的导电性,AgNW/纤维素混合薄膜可以提供出色的焦耳加热,在 3V 的低电源电压下产生快速热响应和均匀电加热。 在对大肠杆菌和金黄色葡萄球菌的抗菌测试中,AgNW/纤维素杂化膜表现出大直径的抑菌圈,显示出高抗菌活性。此外,由于纤维素和 AgNW 的交联结构,AgNW/纤维素混合膜通过提供 1.5% 的断裂应变和 0.45 MPa 的拉伸应力显示出高度可拉伸的行为。基于上述特性,本研究不仅为柔性和可生物降解农膜的制造提供了一种潜在的策略,而且可能为农业热管理提供新的见解。

更新日期:2021-07-25
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