In the conventional process of thermoplastic composites, a heating stage from the external heat source usually consumes a large amount of energy. To solve this problem, self-resistance electric (SRE) heating of carbon fiber-reinforcement was introduced to form a continuous carbon fiber reinforced polyamide 6 (CF/PA 6) composite based on film stacking technique in this paper. The temperature distribution was first measured to verify the temperature uniformity for SRE heating process. X-ray photoelectron spectroscopy (XPS) was used to assess effects on the chemical properties of carbon fibers from SRE heating and conventional convective heating. To evaluate forming quality by SRE heating, the physical properties, crystallinity, and mechanical properties of CF/PA 6 composites were measured. The results show that the forming time and energy consumption of SRE heating process are significantly reduced compared with that of the traditional heating process because of fast heating/cooling rate. While fast heating/cooling rate of SRE heating process leads to a higher void content, which finally results in a slightly lower flexural strength and impact properties of composite laminates. It is clear that SRE heating technique is one of the energy- and cost-effective ways to fabricate continuous carbon fiber reinforced thermoplastic composites although the forming quality is still improved in future investigation.

中文翻译：

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自阻电加热制备连续碳纤维增强聚酰胺6复合材料

在热塑性复合材料的常规工艺中，来自外部热源的加热阶段通常消耗大量能量。为了解决这个问题，本文引入了碳纤维增强材料的自电阻电（SRE）加热，形成了一种基于薄膜堆叠技术的连续碳纤维增强聚酰胺6（CF/PA 6）复合材料。首先测量温度分布以验证 SRE 加热过程的温度均匀性。X 射线光电子能谱 (XPS) 用于评估 SRE 加热和常规对流加热对碳纤维化学性质的影响。为了评估 SRE 加热成型质量，测量了 CF/PA 6 复合材料的物理性能、结晶度和机械性能。结果表明，由于加热/冷却速度快，SRE加热工艺的成型时间和能耗较传统加热工艺显着降低。而SRE加热过程的快速加热/冷却速度导致更高的空隙率，最终导致复合层压板的弯曲强度和冲击性能略低。很明显，SRE 加热技术是制造连续碳纤维增强热塑性复合材料的能源和成本有效的方法之一，尽管在未来的研究中其成型质量仍有待提高。这最终导致复合层压板的弯曲强度和冲击性能略低。很明显，SRE 加热技术是制造连续碳纤维增强热塑性复合材料的能源和成本效益的方法之一，尽管在未来的研究中其成型质量仍有待提高。这最终导致复合层压板的弯曲强度和冲击性能略低。很明显，SRE 加热技术是制造连续碳纤维增强热塑性复合材料的能源和成本效益的方法之一，尽管在未来的研究中其成型质量仍有待提高。