The interfacial interaction between glass fibers (GFs) and polypropylene (PP) resin is the key factor which affects the properties of GFs reinforced PP composites. The β‐transcrystallization (β‐TC) structure induced by β‐nucleating agent (β‐NA) at the interface is beneficial to improving the interfacial performance and comprehensive mechanical properties. However, due to the poor adhesive ability, it is difficult to introduce β‐NAs onto GFs surface directly. In this work, for solving above problem, the sodium carboxymethyl cellulose (CMC) and NH₂ functionalized multiwalled carbon nanotubes (CNTs) were used to construct the network structure on GFs (CMC‐CNT‐GF) through plenty of active groups. Furthermore, the zinc phthalate (ZnPht, β‐NA) was synthesized and coated on GFs surface by hydrogen bonds interaction with CMC‐CNT and physical anchoring effect (ZnPht@CMC‐CNT‐GF). Finally, the hybrid GFs reinforced PP composite (iPP/ZnPht@CMC‐CNT‐GF) was prepared, which exhibited enhanced tensile, flexural, and impact strength by 20.1, 9.3, and 33.3%, respectively when compared with the iPP/raw GF due to the formation of β‐TC and improvement of interfacial adhesion. This study provides an effective strategy to introduce β‐NAs on GFs with network structure for improving interfacial properties by inducing β‐TC to enhance the strength and toughness of composite, which could be applied in other fiber/semicrystalline polymer systems.

中文翻译：

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玻璃纤维表面邻苯二甲酸锌和羧甲基纤维素-碳纳米管的协同作用对改善聚丙烯复合材料的强度和韧性的影响

玻璃纤维（GFs）和聚丙烯（PP）树脂之间的界面相互作用是影响GFs增强PP复合材料性能的关键因素。β-成核剂（β-NA）在界面处诱导的β-结晶（β-TC）结构有利于改善界面性能和综合机械性能。但是，由于粘合力差，很难将β-NAs直接引入GFs表面。在这项工作中，为了解决上述问题，羧甲基纤维素钠（CMC）和 NH ₂功能化的多壁碳纳米管（CNTs）用于通过大量活性基团在GFs（CMC-CNT-GF）上构建网络结构。此外，通过与CMC-CNT的氢键相互作用和物理锚固效应（ZnPht @ CMC-CNT-GF）合成了邻苯二甲酸锌（ZnPht，β-NA）并涂覆在GFs表面。最后，制备了混合GFs增强PP复合材料（iPP / ZnPht @ CMC-CNT-GF），与iPP / raw GF相比，其拉伸强度，弯曲强度和冲击强度分别提高了20.1％，9.3％和33.3％由于β-TC的形成和界面粘附性的改善。这项研究提供了一种有效的策略，即通过诱导β-TC增强复合材料的强度和韧性，在具有网络结构的GF上引入β-NA，从而改善界面性能，