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<p>Polymer composites have different properties due to different molding processes. Exploring the best molding process is a key challenge currently faced by research. This study simultaneously investigated the effects of injection molding and 3D printing on the chemical structure, thermal stability, microstructure and mechanical properties of rice husk (RH)/polylactic acid (PLA) composites, aiming to explore the optimal process for the preparation of RH/PLA composites. The results showed that RH successfully bonded with PLA (FTIR), and as the RH content in PLA increased, the thermal stability of the composite gradually decreased (TGA). The distribution of RH in the injection molded composites was more uniform than that in the 3D printed composites under the microscopic morphology (SEM), and the mechanical properties of the injection molded composites were better than 3D printed composites under the same RH content. Among them, the maximum tensile strength and bending strength of the composites with 15% RH content by injection molding reached 72.63&#xa0;MPa and 99.66&#xa0;MPa, respectively 71% and 22% higher than that of the composites with 15% RH content by 3D printing.</p>

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The influence of different molding processes on the properties of rice husk/polylactic acid composites

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Yufeng Sun,
  • Hengyu Liu,
  • Dongming Shi,
  • Mingyang Liu,
  • Jilai Ying,
  • Ing Kong

摘要

Polymer composites have different properties due to different molding processes. Exploring the best molding process is a key challenge currently faced by research. This study simultaneously investigated the effects of injection molding and 3D printing on the chemical structure, thermal stability, microstructure and mechanical properties of rice husk (RH)/polylactic acid (PLA) composites, aiming to explore the optimal process for the preparation of RH/PLA composites. The results showed that RH successfully bonded with PLA (FTIR), and as the RH content in PLA increased, the thermal stability of the composite gradually decreased (TGA). The distribution of RH in the injection molded composites was more uniform than that in the 3D printed composites under the microscopic morphology (SEM), and the mechanical properties of the injection molded composites were better than 3D printed composites under the same RH content. Among them, the maximum tensile strength and bending strength of the composites with 15% RH content by injection molding reached 72.63 MPa and 99.66 MPa, respectively 71% and 22% higher than that of the composites with 15% RH content by 3D printing.