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<p>Antimicrobial property is considered as a crucial parameter for material intended to be used in food packaging. Recent research has demonstrated that the leaves of papaya (<i>Carica Papaya</i>), Neem (<i>Azadirachta indica</i>), and Sonaru (<i>Cassia fistula</i>) contain bioactive components that exhibit outstanding antimicrobial activity. A biopolymer such as chitosan treated with such bioactive ingredients may lead to an excellent sustainable packaging material with enhanced antimicrobial properties. This investigation reports the development of antimicrobial films of chitosan by treating them with leaf extracts of papaya, neem, and sonaru (PLE, NLE, and SLE). Incorporation of leaf extract into chitosan results in a significant increase in barrier properties like moisture content, swelling, and water vapour permeability (WVP) as compared to pristine chitosan film. Mechanical analysis reveals that the incorporation of NLE and SLE significantly increase tensile strength up to 81&#xa0;MPa, while PLE significantly increases elongation of break percentage up to 24%. Cs films integrated with leaf extract demonstrates a substantially improvement of thermal stability. Furthermore, all the films show effectiveness against both the pathogens <i>E. Coli</i> and <i>B. Subtilis</i>. Notably, NLE-incorporated film exhibits highest antimicrobial activity. These findings highlight the potential of an eco-friendly approach to sustainable packaging material.</p>

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Carica Papaya, Azadirachta Indica, and Cassia Fistula leaves extract incorporated chitosan films for eco-conscious packaging materials

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Apurba Taye,
  • Bijoy Krishna Deka,
  • Himashree Kalita,
  • Tashi Lamu Khrimey,
  • Jayanta Barman,
  • Dhrubajyoti Haloi

摘要

Antimicrobial property is considered as a crucial parameter for material intended to be used in food packaging. Recent research has demonstrated that the leaves of papaya (Carica Papaya), Neem (Azadirachta indica), and Sonaru (Cassia fistula) contain bioactive components that exhibit outstanding antimicrobial activity. A biopolymer such as chitosan treated with such bioactive ingredients may lead to an excellent sustainable packaging material with enhanced antimicrobial properties. This investigation reports the development of antimicrobial films of chitosan by treating them with leaf extracts of papaya, neem, and sonaru (PLE, NLE, and SLE). Incorporation of leaf extract into chitosan results in a significant increase in barrier properties like moisture content, swelling, and water vapour permeability (WVP) as compared to pristine chitosan film. Mechanical analysis reveals that the incorporation of NLE and SLE significantly increase tensile strength up to 81 MPa, while PLE significantly increases elongation of break percentage up to 24%. Cs films integrated with leaf extract demonstrates a substantially improvement of thermal stability. Furthermore, all the films show effectiveness against both the pathogens E. Coli and B. Subtilis. Notably, NLE-incorporated film exhibits highest antimicrobial activity. These findings highlight the potential of an eco-friendly approach to sustainable packaging material.