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Unsaturated polyester (UPE) composites reinforced with glass fiber (GF) offer numerous advantages, but after being used, they are extremely hard to decompose or reuse. Along with the large annual consumption, this type of material poses serious environmental concerns. This study focuses on partially replacing GF and UPE resin with modified rice husk (MRH) to reduce the content of non-biodegradable components in such composites. As rice husk (RH) is also an agricultural waste, this approach can positively contribute to environmental treatment efforts. The influence of GF and MRH content on the mechanical properties of the composite material was investigated. As the MRH content varies from 5 wt% to 25 wt%, the optimal value – 20% is defined and applied in surveying the effect of varying GF content from 10 wt% to 30 wt%. The structure and morphology of the composite samples were examined using field emission scanning electron microscopy (FESEM). Thermal properties were assessed using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Mechanical properties were evaluated according to international standards, including tensile strength, flexural strength, compressive strength, and Izod impact strength. The findings revealed that the ideal composition for the composite based on UPE matrix included 20% of MRH and 20% of GF (10% Mat300 and 10% 2D600). This composite exhibited a flexural strength and a compressive strength of 130.5 and 261.2 MPa, respectively, whereas a tensile strength and an impact strength of 301.5 MPa and 272.2 kJ/m2, respectively, were recorded. FESEM analysis indicated a uniform distribution of MRH without any visible voids or defects. As for the resin, the thermal degradation curve reached a peak at 372.3 ℃, with the thermal stability of this sample achieved at nearly 354.6 ℃. Accordingly, this study provides evidence that MRH can serve as an environmentally friendly filler and reinforcement, and this change of composite composition hardly shows any noticeable degradation in mechanical properties.

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Study on Composite Materials Based on Unsaturated Polyester Resin Matrix and Modified Rice Husk Reinforcement

  • 会议论文

  • 发表日期：

    2025年

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  • Thach Hong Pham,
  • Khuong Tung Truong,
  • Khai Van Tran

摘要

Unsaturated polyester (UPE) composites reinforced with glass fiber (GF) offer numerous advantages, but after being used, they are extremely hard to decompose or reuse. Along with the large annual consumption, this type of material poses serious environmental concerns. This study focuses on partially replacing GF and UPE resin with modified rice husk (MRH) to reduce the content of non-biodegradable components in such composites. As rice husk (RH) is also an agricultural waste, this approach can positively contribute to environmental treatment efforts. The influence of GF and MRH content on the mechanical properties of the composite material was investigated. As the MRH content varies from 5 wt% to 25 wt%, the optimal value – 20% is defined and applied in surveying the effect of varying GF content from 10 wt% to 30 wt%. The structure and morphology of the composite samples were examined using field emission scanning electron microscopy (FESEM). Thermal properties were assessed using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Mechanical properties were evaluated according to international standards, including tensile strength, flexural strength, compressive strength, and Izod impact strength. The findings revealed that the ideal composition for the composite based on UPE matrix included 20% of MRH and 20% of GF (10% Mat300 and 10% 2D600). This composite exhibited a flexural strength and a compressive strength of 130.5 and 261.2 MPa, respectively, whereas a tensile strength and an impact strength of 301.5 MPa and 272.2 kJ/m2, respectively, were recorded. FESEM analysis indicated a uniform distribution of MRH without any visible voids or defects. As for the resin, the thermal degradation curve reached a peak at 372.3 ℃, with the thermal stability of this sample achieved at nearly 354.6 ℃. Accordingly, this study provides evidence that MRH can serve as an environmentally friendly filler and reinforcement, and this change of composite composition hardly shows any noticeable degradation in mechanical properties.