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采用不同碳链的季铵盐阳离子作为插层剂与蒙脱土层间的无机阳离子(Ca2+)交换,制备出系列有机蒙脱土,用有机蒙脱土对环氧树脂进行改性,制备了纳米有机蒙脱土/环氧树脂结构胶,同时,用4因素3水平正交试验设计对关键配料参数进行了优化,并对结构胶的剪切强度和冲击强度进行了测试。研究表明,优化配制的纳米改性环氧树脂胶粘剂是一种高性能的结构胶粘剂,其钢-钢剪切强度可达29.2 MPa,冲击强度可达33.8 MPa,有效地改善了环氧树脂胶粘剂的粘接性能。
A series of organic montmorillonites were prepared by quaternary ammonium cations with different carbon chains as intercalation agents and inorganic cations (Ca2 +) between montmorillonite layers. A series of organic montmorillonites were prepared, and the epoxy resin was modified with organic montmorillonite to prepare Nano-organic montmorillonite / epoxy structural adhesive. At the same time, the key ingredients parameters were optimized by 4-factor-3 orthogonal experiment design. The shear strength and impact strength of the structural adhesive were tested. The results show that the optimized nano-modified epoxy resin adhesive is a high-performance structural adhesive with a steel-steel shear strength of 29.2 MPa and an impact strength of 33.8 MPa, effectively improving the epoxy resin adhesive Adhesive properties.