Scholarlink

<p>Synthetic polymers used in packaging are harmful to human health and the environment. This study presents an eco-friendly polymeric packaging film for the food industry to reduce synthetic film use and enhance food protection. Biodegradable composite films were prepared using a blend of polyvinyl alcohol and starch, incorporating carbon char from waste banana peels and glycerol as a plasticizer. The films' properties were tested, revealing that the 5 wt% carbon film had excellent UV-blocking capabilities, with an improved water contact angle from 35.2° to 55.6°, indicating increased hydrophobicity. The water vapor transmission rate decreased from 71.42 to 45.42&#xa0;g/m<sup>2</sup>h because of denser packing, while the moisture retention ability increased from 84.5 to 93.8% because of better hydrogen bonding and hydrophilic interactions. Microbial studies showed a 90.6% degradation with <i>S. aureus</i> in 7&#xa0;days and 20.7% degradation in soil within 30&#xa0;days, confirming its biodegradability. Overall, this green composite film is a promising solution for food safety and the reduction of plastic pollution.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Design and synthesis of functionalized green PVA/starch composite films with bio-char for fresh food protection

  • 期刊论文

  • 发表日期：

    2025年5月26日

查看全文
  • Paulami Banerjee,
  • Shivam Saw,
  • Mrinal Kanti Mandal,
  • Rajib Ghosh Chaudhuri

摘要

Synthetic polymers used in packaging are harmful to human health and the environment. This study presents an eco-friendly polymeric packaging film for the food industry to reduce synthetic film use and enhance food protection. Biodegradable composite films were prepared using a blend of polyvinyl alcohol and starch, incorporating carbon char from waste banana peels and glycerol as a plasticizer. The films' properties were tested, revealing that the 5 wt% carbon film had excellent UV-blocking capabilities, with an improved water contact angle from 35.2° to 55.6°, indicating increased hydrophobicity. The water vapor transmission rate decreased from 71.42 to 45.42 g/m2h because of denser packing, while the moisture retention ability increased from 84.5 to 93.8% because of better hydrogen bonding and hydrophilic interactions. Microbial studies showed a 90.6% degradation with S. aureus in 7 days and 20.7% degradation in soil within 30 days, confirming its biodegradability. Overall, this green composite film is a promising solution for food safety and the reduction of plastic pollution.

Graphical abstract