基于蛋白质分散的碳纳米管/环氧树脂粘结剂的粘结性能

Investigation of the bonding performance of a protein dispersed carbon nanotube/epoxy adhesive

碳纳米管/环氧树脂因其优良的力学与粘结性能可广泛应用于航空航天等高端领域结构件的胶结连接。然而如何有效降低碳纳米管的团聚性,保证制备工艺的低成本与绿色环保是该纳米粘结剂能够实际应用的关键。为此,本文提出一种基于蛋白质分散的碳纳米管增强环氧树脂粘接剂并对其粘结性能进行了研究。结果表明:经过酸或碱性环境变性处理的大豆分离蛋白能够有效降低碳纳米管的团聚性并显著提高环氧树脂的粘接性能,当碳纳米管质量分数为0.1wt%时,经酸、碱性处理的大豆分离蛋白-碳纳米管/环氧树脂粘结剂的粘结性能增幅分别为26.6%、26.7%;而当碳纳米管质量分数增加到0.3wt%时,两种处理方法的大豆分离蛋白-碳纳米管/环氧树脂粘结剂的粘结性能增幅分别为10.2%和18.3%,碱处理结果比酸处理提升79%。

Carbon nanotube(CNT)/epoxy resin can be widely used to bond advanced structural parts in the aerospace field due to its excellent mechanical and bonding properties.However,how to effectively reduce the agglomeration of carbon nanotubes and ensure low cost and environmental protection of the preparation process is the key to the practical application of the nano-binder.Therefore,this paper proposes a protein dispersed carbon nanotube reinforced epoxy resin adhesive and investigates its bonding performance.The results show that the soy protein isolate(SPI)after a certain acid or alkali denaturation treatment can effectively reduce the agglomeration of carbon nanotubes and significantly improve the bonding performance of epoxy resin.When the CNT loading is0.1wt%,the bonding property of acid and alkali treated SPI-CNT/epoxy is increased by 26.6%and 26.7%.While the CNT loading increases to 0.3wt%,the bonding property enhancement of the two treated methods comes to 10.2%and 18.3%,the alkali method is 79%higher than the acid one.