Graphene nanoplatelets/epoxy composites with excellent shear properties for construction adhesives
Graphene nanoplatelets/epoxy composites with excellent shear properties for construction adhesives
复制标题
用于建筑粘合剂的具有优异剪切性能的石墨烯纳米片/环氧树脂复合材料
DOI：
10.1016/j.compositesb.2018.08.113
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发表时间：
2018-11-01
影响因子：
13.1
通讯作者：
Zou, Yun
中科院分区：
文献类型：
--
作者：
Wang, Zhenyu;Jia, Zhemin;Zou, Yun
在过去的几十年里，建筑胶粘剂的性能和粘接能力引起了人们的极大兴趣。本文通过厚粘接剪切试验（TAST）对石墨烯纳米片增强环氧建筑胶粘剂的剪切性能进行了实验研究。实验结果表明，纳米复合材料的抗剪强度随石墨烯含量的增加而增加。值得注意的是，与纯环氧胶粘剂相比，石墨烯含量仅为0.75 wt%的纳米复合材料的抗剪强度提高了102%。其他剪切性能，包括剪切模量、破坏时的剪切应变和韧性，也比纯环氧树脂表现得更好，这表明石墨烯在改善剪切性能方面的有效性。采用三维有限元分析（FEA）预测了不同纳米复合材料黏合剂对TAST试样力学性能的影响。将实验所得的纳米复合材料剪切性能作为黏结区模型参数进行有限元分析。预测结果与实验结果吻合较好。
The properties and bonding capabilities of construction adhesives have attracted tremendous interests in the past decades. This paper conducts an experimental study on the shear properties of epoxy construction adhesive reinforced with graphene nanoplatelets (GNPs) through thick adherend shear test (TAST). The experimental results show that the shear strength of nanocomposites increases with the increased graphene content. It is worth noting that the shear strength of nanocomposites at a graphene content of only 0.75 wt% exhibit a 102% enhancement compared with neat epoxy adhesive. Other shear properties, including shear modulus, shear strain at failure and toughness also deliver much better performances compared with neat epoxy, indicating the effectiveness of graphene on shear properties improvement. The mechanical behavior of the TAST specimens with different nanocomposites adhesive are predicted using 3D finite elements analysis (FEA). The shear properties of nanocomposites obtained from the experimental results are used as cohesive zone model parameters in FEA. The prediction agree very well with the experimental results.