Carbon fiber (CF) reinforced polyamide 6 (PA6) composite has an extensive application. However, the performances of CF/PA6 composite are constrained by the poor interfacial adhesion between CF and PA6 matrix. In this article, in order to strengthen the interfacial adhesion of CF/PA6 composite, a layer of poly(cyclotriphosphazene‐co ‐4,4′‐sulfonyldiphonel) (PZS) hybrid coating with plenty of PZS microspheres (PZSMS) was successfully introduced onto CF surface through facile in situ polymerization. After surface modification, the surface morphologies and the surface chemical structures of fibers changed distinctly. On one hand, the PZSMS provided more contact points and increased mechanical interlocking between CF and PA6 matrix. On the other hand, numerous hydrogen bonds between CF and PA6 were formed due to a great amount of unique polar groups on modified CF surface. Consequently, in comparison with untreated CF, the interfacial shear strength of CF‐PZSMS/PA6 composites was improved from 37.68 ± 3.16 to 53.79 ± 3.38 MPa, by 42.75 ± 3.02%. The results indicated that PZS hybrid coating on fiber surface effectively improved the interfacial adhesion of CF/PA6 composites, and the stronger hydrogen bonding and the enhanced mechanical interlocking synergistically played a major role in such significant improvements.

中文翻译：

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碳纤维混杂多磷腈涂层处理对CF / PA6复合材料界面性能的影响

碳纤维（CF）增强的聚酰胺6（PA6）复合材料具有广泛的应用。然而，CF / PA6复合材料的性能受到CF和PA6基质之间不良的界面粘合性的限制。在本文中，为了加强CF / PA6复合材料的界面粘合，聚层（cyclotriphosphazene-共通过简便的原位聚合将具有大量PZS微球（PZSMS）的‐4,4'-磺酰基二电话（PZS）杂化涂料成功引入CF表面。表面改性后，纤维的表面形态和表面化学结构发生了明显变化。一方面，PZSMS提供了更多的接触点，并增强了CF和PA6基质之间的机械互锁。另一方面，由于改性的CF表面上大量的独特极性基团，在CF和PA6之间形成了许多氢键。因此，与未处理的CF相比，CF-PZSMS / PA6复合材料的界面剪切强度从37.68±3.16 MPa提高到53.79±3.38 MPa，提高了42.75±3.02％。结果表明，在纤维表面上的PZS杂化涂层有效地改善了CF / PA6复合材料的界面粘合力，