Epoxy is being extensively used in various engineering and structural applications. Epoxy is non-biodegradable, thus creating ecological problems. Apart from ecological problems, epoxy resin shows poor biofouling prevention in marine, freshwater and offshore environments. In the search for an eco-friendly solution to this problem, epoxy/chitosan/silver nanocomposites were devised. Chitosan was extracted from shrimp shells following deacetylation of chitin, and silver (Ag) nanoparticles synthesized using a chemical reduction process of silver salts. All the composite samples were prepared utilizing the solution casting method. The X-ray diffraction pattern and Fourier transform infrared analysis predict the successful creation of silver nanoparticles and chitosan, respectively. Different mechanical testings elaborate the fact that addition of chitosan into epoxy resin increases hardness, lowering tensile and flexural strength, whereas incorporation of silver nanoparticles reverses those properties, resulting in mechanical properties analogous with neat epoxy resin. Additionally, soil burial biodegradation testing ensured relatively greener characteristics of the final nanocomposites. Herein, the combined effect of chitosan and silver nanoparticles on an epoxy matrix is reported for the first time.

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绿色环氧树脂/壳聚糖/银纳米复合材料的制备及力学性能

环氧树脂广泛用于各种工程和结构应用。环氧树脂是不可生物降解的，因此会产生生态问题。除了生态问题外，环氧树脂在海洋、淡水和近海环境中的生物污染防护能力也很差。在寻找解决这个问题的环保解决方案时，设计了环氧树脂/壳聚糖/银纳米复合材料。在几丁质脱乙酰化后从虾壳中提取壳聚糖，并使用银盐的化学还原过程合成银 (Ag) 纳米颗粒。所有复合材料样品均采用溶液浇铸法制备。X 射线衍射图和傅里叶变换红外分析分别预测银纳米颗粒和壳聚糖的成功制备。不同的机械测试详细说明了这样一个事实，即在环氧树脂中添加壳聚糖会增加硬度，降低拉伸和弯曲强度，而银纳米粒子的加入会逆转这些性能，从而产生与纯环氧树脂类似的机械性能。此外，土壤掩埋生物降解测试确保了最终纳米复合材料的相对绿色特性。在此，首次报道了壳聚糖和银纳米粒子对环氧树脂基质的联合作用。土壤掩埋生物降解测试确保了最终纳米复合材料的相对绿色特性。在此，首次报道了壳聚糖和银纳米粒子对环氧树脂基质的联合作用。土壤掩埋生物降解测试确保了最终纳米复合材料的相对绿色特性。在此，首次报道了壳聚糖和银纳米粒子对环氧树脂基质的联合作用。