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<p>Surface-modified nanocellulose (SMNC), a biopolymer, has become prevalent in industries. It serves a purpose in fabricating new bioplastics employed for packaging. To improve the mechanical robustness and antibacterial properties of polylactic acid (PLA), one possible approach is to incorporate pectin and SMNC from lignocellulosic biomass. This research extensively investigated the optimization of PLA-SMNC-pectin blends, utilizing precise control over the composition with 88.5&#xa0;mg of PLA, 3.5% (wt% of PLA) of SMNCs, and 7% (wt% of PLA) of pectin. The main aspect of this study was the use of <i>Borassus</i> <i>flabellifer</i> leaves and fruits for the environmentally friendly synthesis of both SMNC and pectin, respectively. The biocomposite effectively inhibited the growth of both <i>Escherichia coli</i> ATCC 8739 and <i>Bacillus subtilis</i> ATCC21332, indicating its potential for various applications. Additionally, the film exhibited remarkable resistance to UV radiation, with only 9.5247% UVA transmission. This was complemented by a tensile strength of 6.53&#xa0;MPa and Young's modulus of 0.00299 GPa, surpassing those of pure PLA. Together, these results demonstrate the adaptability and potential of the PLA-SMNC-pectin film in strawberry fruit packaging presenting a countermeasure for alleviating the ecological concerns associated with conventional plastics.</p>

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Sustainable packaging films: polylactic acid-surface-modified nanocellulose-pectin biocomposite to extend shelf life of strawberry fruit

  • 期刊论文

  • 发表日期：

    2025年1月8日

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  • Medha Maitra,
  • Rithika Adari,
  • P. Radha

摘要

Surface-modified nanocellulose (SMNC), a biopolymer, has become prevalent in industries. It serves a purpose in fabricating new bioplastics employed for packaging. To improve the mechanical robustness and antibacterial properties of polylactic acid (PLA), one possible approach is to incorporate pectin and SMNC from lignocellulosic biomass. This research extensively investigated the optimization of PLA-SMNC-pectin blends, utilizing precise control over the composition with 88.5 mg of PLA, 3.5% (wt% of PLA) of SMNCs, and 7% (wt% of PLA) of pectin. The main aspect of this study was the use of Borassus flabellifer leaves and fruits for the environmentally friendly synthesis of both SMNC and pectin, respectively. The biocomposite effectively inhibited the growth of both Escherichia coli ATCC 8739 and Bacillus subtilis ATCC21332, indicating its potential for various applications. Additionally, the film exhibited remarkable resistance to UV radiation, with only 9.5247% UVA transmission. This was complemented by a tensile strength of 6.53 MPa and Young's modulus of 0.00299 GPa, surpassing those of pure PLA. Together, these results demonstrate the adaptability and potential of the PLA-SMNC-pectin film in strawberry fruit packaging presenting a countermeasure for alleviating the ecological concerns associated with conventional plastics.