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首页> 外文期刊>Journal of Adhesion Science and Technology: The International Journal of Theoredtical and Basic Aspects of Adhesion Science and Its Applications in All Areas of Technology >The influence of the core-shell structured meta-aramid/epoxy nanofiber mats on interfacial bonding strength and the mechanical properties of epoxy adhesives at cryogenic environment
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The influence of the core-shell structured meta-aramid/epoxy nanofiber mats on interfacial bonding strength and the mechanical properties of epoxy adhesives at cryogenic environment

机译：核-壳结构间位芳纶/环氧树脂纳米纤维垫对低温环境下环氧树脂胶粘剂的界面结合强度和力学性能的影响

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The adhesives for adhesively bonded joints at cryogenic environment should be enhanced by reinforcement with low coefficient of thermal expansion (CTE) and high fracture toughness because the materials become quite brittle at cryogenic temperature. Aramid fibers are noted for their low CTE and have been used to control the CTE of thermosetting resins. However, aramid composites exhibit poor adhesion between the fibers and the resin because the aramid fibers are chemically inert and contain insufficient functional groups. In this work, core-shell structured meta-aramid/epoxy nanofiber mats were fabricated by electrospinning with polymer blending method to improve the interfacial bonding between the adhesive and the fibers under cryogenic temperature. The CTE of the epoxy adhesives reinforced with modified nanofiber mats was measured, and the effect on the adhesion strength was investigated at single lap joints at cryogenic temperature. The fracture toughness of the adhesive joints was measured using a double cantilever beam (DCB) test.
机译：在低温环境下，用于粘合接头的粘合剂应通过低热膨胀系数（CTE）和高断裂韧性的增强来增强，因为这种材料在低温下会变得很脆。芳族聚酰胺纤维因其低CTE而著称，已被用于控制热固性树脂的CTE。但是，芳族聚酰胺复合材料在纤维和树脂之间显示出差的粘合性，因为芳族聚酰胺纤维是化学惰性的并且包含不足的官能团。在这项工作中，通过静电纺丝与聚合物共混方法制备核-壳结构的间位芳族聚酰胺/环氧树脂纳米纤维垫，以改善低温下粘合剂与纤维之间的界面粘结。测量了改性纳米纤维垫增强的环氧胶粘剂的CTE，并研究了在低温下单搭接接头对胶粘强度的影响。使用双悬臂梁（DCB）测试来测量粘合接头的断裂韧性。

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