Abstract Interfacial adhesion in fiber reinforced composites is a critical factor for their mechanical performance in structural applications. As nanomaterials continue to rise in prominence, the use of nanostructured interphases has grown to become a viable technique to reinforce the fiber-matrix interface of fiber reinforced polymer composites. Here, a polymeric interphase consisting of aramid nanofibers (ANFs) is introduced on Poly(diallyldimethylammonium chloride) (PDDA) coated fiberglass through electrostatic adsorption. The simple and rapid coating technique considerably roughens the inorganic fiber surface, while enriching it with polar functional groups that are capable of chemically bonding with the matrix, all while preserving the structural integrity of the fiber. The nanostructured coating improves the interfacial shear strength by up to 83.2%, along with a 35.3% improvement in short beam shear strength. These improvements can be attributed to the enhanced chemical and mechanical interactions between the fiber and the matrix. The following findings highlight the potential for the utilization of a PDDA coating to enhance the adhesion of ANFs on fiberglass and enable the fabrication of composite structures with higher strength and toughness through a rapid, simple and effective surface treatment.

中文翻译：

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通过芳纶纳米纤维界面增强分级玻璃纤维复合材料的界面强度

摘要 纤维增强复合材料中的界面粘附是其在结构应用中的机械性能的关键因素。随着纳米材料的日益突出，纳米结构中间相的使用已经发展成为一种可行的技术来增强纤维增强聚合物复合材料的纤维-基质界面。在这里，通过静电吸附在聚（二烯丙基二甲基氯化铵）（PDDA）涂层玻璃纤维上引入由芳纶纳米纤维（ANF）组成的聚合物界面。简单而快速的涂层技术使无机纤维表面显着粗糙，同时富含能够与基质化学键合的极性官能团，同时保持纤维的结构完整性。纳米结构涂层将界面剪切强度提高了 83.2%，同时短梁剪切强度提高了 35.3%。这些改进可归因于纤维和基体之间增强的化学和机械相互作用。以下研究结果强调了利用 PDDA 涂层增强 ANF 在玻璃纤维上的附着力并通过快速、简单和有效的表面处理制造具有更高强度和韧性的复合结构的潜力。