Carbon fiber paper reinforced thermoplastics (CPT) have broad application prospects because of its simple production process and good mechanical properties. Currently, polyamide 6 (PA6) is a promising matrix for CPT and is widely used for mass-production. However, the performance of CPT materials in marine and harsh environments must be evaluated because of its environmental sensitivity. In this study, the seawater absorption of CPT was analyzed using Fick’s diffusion law. The flexural properties of CPT in harsh and marine environments were studied by three-point bending. Based on the results, it was concluded that seawater and high temperatures have negative effects on the flexural properties of CPT. Microscopy results showed the mechanisms of failure under the action of seawater and high temperatures. Droplet test was employed to analyze the interfacial shear properties between the fiber and resin. The results showed that after seawater immersion, the interfacial shear strength had a discernable decrease.

碳纤维纸增强热塑性塑料（CPT）因其生产工艺简单、机械性能好而具有广阔的应用前景。目前，聚酰胺 6 (PA6) 是一种很有前途的 CPT 基质，并被广泛用于批量生产。但是，CPT 材料在海洋和恶劣环境中的性能必须进行评估，因为它具有环境敏感性。在这项研究中，使用菲克扩散定律分析了 CPT 的海水吸收率。通过三点弯曲研究了 CPT 在恶劣和海洋环境中的弯曲特性。结果表明，海水和高温对 CPT 的弯曲性能有负面影响。显微镜结果显示了海水和高温作用下的失效机制。液滴试验用于分析纤维和树脂之间的界面剪切性能。结果表明，海水浸泡后，界面剪切强度有明显的下降。