Work

The Reinforcing Effect of O‐ C 3 N 4 on the Interfacial Bonding and Mechanical Properties of Ramie Fiber/Epoxy Composites

Year: 2025

Type: article

Abstract: ABSTRACT Oxidized carbon nitride (O‐C 3 N 4 ) nanosheets, synthesized via Hummers' method oxidation of carbon nitride (C 3 N 4 ), offer advantages including low cost, simple production, and good dispersibility over conventional nanofillers such as carbon nanotubes etc. The O‐C 3 N 4 nanosheets significantly improved interfacial interactions within the ramie fiber/epoxy (O‐C 3 N 4 /RF/EP) composite. At an optimal O‐C 3 N 4 loading of 0.3 phr, the composite exhibited remarkable enhancements: interlaminar shear strength (ILSS), tensile strength, flexural strength, impact strength, and storage modulus increased by 11.3%, 15.4%, 9.0%, 7.6%, and 19.9%, respectively. Furthermore, the glass transition temperature ( T g ) of the composite was elevated by 7.3°C compared to the baseline RF/EP (79.44°C). The effective interfacial modification achieved through O‐C 3 N 4 incorporation establishes these nanosheets as a promising strategy for engineering high‐performance natural fiber composites.

Source: Polymer Composites

DOI: 10.1002/pc.70602