Charles Albert Linton, Motsa Nomalungelo, Abdillah Annur Ahadi
Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, 1 Shuefu Road, Neipu, Pingtung 91201, Taiwan.
International Master Degree Program in Food Science, National Pingtung University of Science and Technology, 1 Shuefu Road, Neipu, Pingtung 91201, Taiwan.
Polymers (Basel). 2022 Aug 25;14(17):3462. doi: 10.3390/polym14173462.
Potatoes are a source of starch, which is an eco-friendly alternative to petrochemicals in plastic production. Increasing potato production also creates agricultural waste that could be converted to potato peel starch (PPS) and developed as films. A response surface method approach was employed to optimize the bioconversion of PPS (2, 4, and 6% w/v) and compared with carboxymethyl cellulose (CMC)-based films. The microstructure analysis of PPSF showed increased thickness, decreased swelling power, water solubility, and vapor permeability, which were linked to increased molecular interactions as a function of PPS increments. However, low-starch PPSF exhibited high transparency, good mechanical properties, and thermal stability (high melting temperature), pliability, and accelerated seawater and soil biodegradation (~90%: 20 and 50 days, respectively). All films exhibited thermal stability at >100 °C and retained similar amorphous characteristics, evidenced by their flexibility, which confirmed the potential use for PPS in packaging perishable and cooled foods.
土豆是淀粉的一种来源，淀粉在塑料生产中是一种替代石化产品的环保材料。增加土豆产量也会产生农业废弃物，这些废弃物可以转化为土豆皮淀粉（PPS）并制成薄膜。采用响应面法来优化PPS（2%、4%和6% w/v）的生物转化，并与羧甲基纤维素（CMC）基薄膜进行比较。PPSF的微观结构分析表明，随着PPS含量增加，薄膜厚度增加、溶胀度、水溶性和透湿性降低，这与分子间相互作用增强有关。然而，低淀粉含量的PPSF具有高透明度、良好的机械性能和热稳定性（高熔点）、柔韧性，并且在海水和土壤中的生物降解加速（分别在20天和50天达到约90%）。所有薄膜在>100°C时都表现出热稳定性，并保持相似的无定形特征，这通过它们的柔韧性得以证明，这证实了PPS在包装易腐食品和冷藏食品方面的潜在用途。
