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<p>Cellulose is a sustainable alternative to conventional inorganic fillers. However, its propensity to agglomerate hinders the advancement of natural rubber composites. To address this challenge, a novel macromolecular chain, Poly(dodecahydroxystearic acid)-3-isocyanatopropyltrimethoxysilane (PHS-IPMS), was synthesized and grafted onto the cellulose surface to confer superior hydrophobic properties. The modified cellulose-filled natural rubber composites increased the tensile strength and tear strength by 21.82% and 24.82%, respectively, up to 75% replacement of silica. Molecular dynamics simulations indicate that the macromolecular chain-modified cellulose exhibits improved dispersibility and stronger interfacial bonding with natural rubber compared to its unmodified counterpart. This work provides a novel method for cellulose modification and extends the applicability of green polymer-based materials.</p>

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Hydrophobically modified microcrystalline cellulose for replacing silica in natural rubber composites

  • 期刊论文

  • 发表日期：

    2025年2月27日

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  • Zhenlu Li,
  • Huaxu Song,
  • Zhen Wang,
  • Zhengying Qin,
  • Linquan Wang,
  • Xin Fan,
  • Ziwei Li,
  • Shaorong Lu

摘要

Cellulose is a sustainable alternative to conventional inorganic fillers. However, its propensity to agglomerate hinders the advancement of natural rubber composites. To address this challenge, a novel macromolecular chain, Poly(dodecahydroxystearic acid)-3-isocyanatopropyltrimethoxysilane (PHS-IPMS), was synthesized and grafted onto the cellulose surface to confer superior hydrophobic properties. The modified cellulose-filled natural rubber composites increased the tensile strength and tear strength by 21.82% and 24.82%, respectively, up to 75% replacement of silica. Molecular dynamics simulations indicate that the macromolecular chain-modified cellulose exhibits improved dispersibility and stronger interfacial bonding with natural rubber compared to its unmodified counterpart. This work provides a novel method for cellulose modification and extends the applicability of green polymer-based materials.