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<p>To mitigate white pollution from conventional plastic mulch, this study fabricates a biodegradable mulch film by compositing agricultural waste corn stalk (CS) powder with a poly(butylene adipate-co-terephthalate) (PBAT)/polylactic acid (PLLA) blend. Melt processing with 10 wt% CS yielded a composite film with a 38.6% increase in tensile strength (3.45&#xa0;MPa) while maintaining high ductility (280% elongation). Fourier transform infrared spectroscopy and scanning electron microscopy confirmed strong interfacial bonding via hydrogen interactions and mechanical interlocking, which underpins the enhanced mechanical properties. The composite retained integrity for over 60 days in soil burial tests, aligning with typical crop cycles, and demonstrated comparable warmth and moisture retention to polyethylene (PE) mulch in pak choi growth trials. This work provides theoretical and technical support for the high-value utilization of agricultural waste and the development of green agricultural films.</p>

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Study on preparation and properties of corn stalk modified biodegradable mulch film

  • 期刊论文

  • 发表日期：

    2026年2月6日

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  • Wen Xin,
  • Yajun Ren,
  • Zihan Yang,
  • Yu Su,
  • Wenqi Guo,
  • Yali Xing,
  • Xuanchen Li,
  • Ang Li

摘要

To mitigate white pollution from conventional plastic mulch, this study fabricates a biodegradable mulch film by compositing agricultural waste corn stalk (CS) powder with a poly(butylene adipate-co-terephthalate) (PBAT)/polylactic acid (PLLA) blend. Melt processing with 10 wt% CS yielded a composite film with a 38.6% increase in tensile strength (3.45 MPa) while maintaining high ductility (280% elongation). Fourier transform infrared spectroscopy and scanning electron microscopy confirmed strong interfacial bonding via hydrogen interactions and mechanical interlocking, which underpins the enhanced mechanical properties. The composite retained integrity for over 60 days in soil burial tests, aligning with typical crop cycles, and demonstrated comparable warmth and moisture retention to polyethylene (PE) mulch in pak choi growth trials. This work provides theoretical and technical support for the high-value utilization of agricultural waste and the development of green agricultural films.