Study on Epoxy Resin Composite Reinforced with Rice Straw Fiber

Abstract

In order to enhance the performance of the epoxy resin-prepared materials, straw fiber was used as the reinforcing base in this study. The principle of this study is to use the cellulose component exposed after the defibrillation of straw fiber can be further combined with the epoxy group. Firstly, the degree of defibrillation of straw fiber under three different pretreatment methods of acid, alkali and moist heat treatment was explored, and a control test was conducted with untreated straw fiber, which showed that the defibrillation of the straw fiber after alkali treatment was better than the other two methods. Secondly, to prove the comprehensive effect of the pretreatment method and straw fiber filling amount on the composite material performance, this paper carried out a tensile, bending, density and water absorption test. The results showed that when the straw fiber filling was 15%, the best performance of the composites was achieved by the alkali treatment, with tensile strength and tensile modulus reaching 1.89 KN and 3.92 MPa, bending strength and bending modulus reaching 2.00 KN and 81.65 MPa, average water absorption reaching 2.77%, and density reaching 0.957 g/cm3. Finally, the results were verified using Image J software was used for verification. After comparison, the material meets the basic requirements of high-density fiberboard material and provides a reference for preparing straw epoxy resin composites.

Mechanical and Sound Absorption of Rice Straw Fiber Reinforced Bio-Epoxy Composites for Lightweight Components in Rail Vehicles

“…Its abundance, renewability, and low cost make it an attractive candidate for sustainable material development. Furthermore, advances in chemical and mechanical processing techniques have paved the way for optimizing the compatibility between rice straw fibers and epoxy matrices, leading to improved adhesion and overall material performance [1][2][3]. Ranjan et al [2] reported the strength of rice straw fiber-reinforced epoxy biodegradable composite for the use of industrial applications.…”

“…However, the tensile and flexural strengths of the composite decrease with increasing fiber volume fraction. Liu et al [3] claimed that the defibrillation of the straw fiber with alkali treatment was better than the acid and moisture treatment. The best performance of composites was achieved by the alkali treatment.…”