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<p><i>Xylanase</i> enzyme hydrolysed nanocellulose (NC) from <i>Acalypha hispida</i> (<i>A. hispida)</i> leaves was functionalised with <i>Cassia fistula</i> seed gum (CFG), a natural polysaccharide, to enhance the interfacial bonding and technological properties of elastomeric composites. NC and CFG functionalised NC (CFGNC) were incorporated into Carboxylated Nitrile Rubber (XNBR) latex to fabricate nanocomposites. Structural and morphological analyses confirmed strong interfacial adhesion and uniform dispersion of NC and CFGNC within the XNBR matrix. The tensile strength of the nanocomposites increased significantly with the addition of 2 phr (parts per rubber) of NC and 3 phr of CFGNC, showing improvements of 71% and 85% respectively, compared to neat XNBR. Similarly, the tensile modulus increased by 79% and 105%, indicating the reinforcing effect of NC and CFGNC in XNBR matrix. Swelling studies confirmed reduced solvent uptake, suggesting increased crosslink density and restricted mobility of the polymer chains. Thermogravimetric analysis (TGA) demonstrated enhanced thermal stability for the nanocomposites. These findings highlight the enhanced solvent barrier, mechanical strength, and thermal stability of nanocomposites, showing that enzymatically isolated NC modified with CFG can effectively reinforce XNBR for various applications including health care and consumer products.</p>

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Enzymatically isolated nanocellulose modified with Cassia fistula seed gum for reinforcing carboxylated nitrile rubber

  • 期刊论文

  • 发表日期：

    2026年7月17日

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  • Poornima M P,
  • Dileep P,
  • Sinto Jacob

摘要

Xylanase enzyme hydrolysed nanocellulose (NC) from Acalypha hispida (A. hispida) leaves was functionalised with Cassia fistula seed gum (CFG), a natural polysaccharide, to enhance the interfacial bonding and technological properties of elastomeric composites. NC and CFG functionalised NC (CFGNC) were incorporated into Carboxylated Nitrile Rubber (XNBR) latex to fabricate nanocomposites. Structural and morphological analyses confirmed strong interfacial adhesion and uniform dispersion of NC and CFGNC within the XNBR matrix. The tensile strength of the nanocomposites increased significantly with the addition of 2 phr (parts per rubber) of NC and 3 phr of CFGNC, showing improvements of 71% and 85% respectively, compared to neat XNBR. Similarly, the tensile modulus increased by 79% and 105%, indicating the reinforcing effect of NC and CFGNC in XNBR matrix. Swelling studies confirmed reduced solvent uptake, suggesting increased crosslink density and restricted mobility of the polymer chains. Thermogravimetric analysis (TGA) demonstrated enhanced thermal stability for the nanocomposites. These findings highlight the enhanced solvent barrier, mechanical strength, and thermal stability of nanocomposites, showing that enzymatically isolated NC modified with CFG can effectively reinforce XNBR for various applications including health care and consumer products.