Abstract

Cellulose nanofibers (CNFs) are environmentally friendly materials with a high specific strength. To enhance the impact properties of the carbon fiber reinforced plastics (CFRPs), a method for inserting a CNF dispersion layer between prepregs was developed. By using an aqueous solution of epoxy resin, the hydrophobic treatment of CNF became unnecessary. In this study, CFRP with CNF dispersion layers was fabricated with different CNF content. The impact energy absorbed by the CFRP specimen was increased with the increasing CNF content, and the Charpy impact value increased up to a maximum of 21% by the CNF dispersion layers.

• Highlights

• Carbon fiber reinforced plastics (CFRPs) specimens with the cellulose nanofiber (CNF) dispersion layer were fabricated.

• The specimens were fabricated by varying the content of CNF.

• Impact energy absorbed by the CFRP specimen was increased with increased CNF content.

• Charpy impact value increased up to 21%; optimum ductility index value was clarified.

摘要

纤维素纳米纤维（CNF）是一种具有高比强度的环保材料。为了提高碳纤维增强塑料 (CFRP) 的冲击性能，开发了一种在预浸料之间插入 CNF 分散层的方法。通过使用环氧树脂的水溶液，不需要对CNF进行疏水化处理。在这项研究中，制造了具有不同 CNF 含量的 CNF 分散层的 CFRP。随着 CNF 含量的增加，CFRP 试样吸收的冲击能量增加，CNF 分散层的夏比冲击值最大增加了 21%。

• 强调

• 制造了具有纤维素纳米纤维 (CNF) 分散层的碳纤维增强塑料 (CFRP) 样品。

• 通过改变 CNF 的含量来制造标本。

• CFRP 试样吸收的冲击能量随着 CNF 含量的增加而增加。

• 夏比冲击值增加达21%；明确了最佳延展性指标值。