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<p>The high-value utilization of waste plant fibers enhances resource efficiency, reduces environmental pollution, and promotes sustainable development. This study investigates four types of waste fibers—bamboo powder (BP), wood powder (WP), ramie fiber (RF), and waste paper fiber (WF)—as reinforcements in composites, modified through two synergistic approaches. Recycled high-density polyethylene (rHDPE) serves as the matrix. The results show that the WF/rHDPE composites exhibit 18.5% and 36.3% improvements in tensile and bending strength, respectively, compared to rHDPE. After NaOH pretreatment and modification with dopamine and KH570, the 24&#xa0;h water absorption rate drops to 0.09%, with significant reductions in the other composite’s water absorption. Following NaOH pretreatment and modification with nano-SiO<sub>2</sub> and KH570, the crystallinity of WF/rHDPE and BP/rHDPE increases by 9.12% and 12.8%, respectively, while their 24&#xa0;h water absorption rates are reduced to 0.11% and 0.3%. Both modification methods significantly enhance mechanical properties and interfacial bonding.</p>

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Two modifications influence performance of recycled HDPE-based composites reinforced with various cellulosic fibers

  • 期刊论文

  • 发表日期：

    2025年10月8日

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  • Maocai Huang,
  • Xiaolin Zhang,
  • Xing Chang,
  • Zhenqi Zhao,
  • Yali Wu,
  • Xiaoxi Xu,
  • Yunhao Pan,
  • Jinlong Qin

摘要

The high-value utilization of waste plant fibers enhances resource efficiency, reduces environmental pollution, and promotes sustainable development. This study investigates four types of waste fibers—bamboo powder (BP), wood powder (WP), ramie fiber (RF), and waste paper fiber (WF)—as reinforcements in composites, modified through two synergistic approaches. Recycled high-density polyethylene (rHDPE) serves as the matrix. The results show that the WF/rHDPE composites exhibit 18.5% and 36.3% improvements in tensile and bending strength, respectively, compared to rHDPE. After NaOH pretreatment and modification with dopamine and KH570, the 24 h water absorption rate drops to 0.09%, with significant reductions in the other composite’s water absorption. Following NaOH pretreatment and modification with nano-SiO2 and KH570, the crystallinity of WF/rHDPE and BP/rHDPE increases by 9.12% and 12.8%, respectively, while their 24 h water absorption rates are reduced to 0.11% and 0.3%. Both modification methods significantly enhance mechanical properties and interfacial bonding.