Comparison of Properties of Films Prepared from Potato Starch Modified by Annealing and Heat-Moisture Treatment
Comparison of Properties of Films Prepared from Potato Starch Modified by Annealing and Heat-Moisture Treatment
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DOI：
10.1002/star.202200110
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发表时间：
2022-09-28
期刊：
影响因子：
2.3
通讯作者：
Sit, Nandan
中科院分区：
文献类型：
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作者：
Dutta, Ditimoni;Sit, Nandan
本研究采用水热处理，即退火（ANN）和热气氛处理（HMT）对马铃薯淀粉进行改性。以马铃薯淀粉与水的比例（1:2），在60℃下进行人工神经ANN，持续一天。对于HMT，将天然淀粉暴露在110摄氏度下，保持20%的水分（M.C.） 8小时。马铃薯生物膜（天然和改性）采用溶液铸造法，使用甘油作为增塑剂制备。对天然淀粉和改性淀粉的性能以及显影膜进行了评价。hmt改性淀粉具有较低的溶解度（10.5%）、较低的溶胀力（21.2 g g(-1)）、较低的冻融稳定性和非牛顿流体行为。与退火和天然淀粉膜相比，HMT淀粉膜的溶解度降低（13.57%），WVP (0.20 g mm m(-2) h(-1) kPa(-1))，机械性能提高（抗拉强度7.62 MPa，伸长率11.36%，密封强度4.06 MPa）。与天然淀粉相比，ANN淀粉提高了淀粉膜的伸长率（9.36%），降低了淀粉膜的溶解度（17.31%）和WVP (0.65 g mm m(-2) h（-1) kPa(-1)）。结果表明，马铃薯淀粉基薄膜在15天内生物降解。所研制的生物可降解包装膜以马铃薯淀粉为原料，具有良好的成膜性能和生态友好性，可满足各种包装要求。
This study modified potato starches using hydrothermal treatment, i.e., annealing (ANN) and heatmoisture treatment (HMT). ANN in the ratio (1:2) of potato starch and water at 60 degrees C is performed for a day. For HMT, native starch is exposed to 110 degrees C maintained at 20% moisture content (M.C.) for 8 h. Potato bio-films (native and modified) are prepared by solution casting method using glycerol as a plasticizer. The properties of native and modified starches along with developed films are evaluated. HMT-modified starches showed lower solubility (10.5%), lower swelling power (21.2 g g(-1)), lower freeze-thaw stability, and exhibited non-Newtonian fluid behavior. Films produced from HMT starch have decreased solubility (13.57%), WVP (0.20 g mm m(-2) h(-1) kPa(-1)), and enhanced mechanical properties (7.62 MPa tensile strength, elongation of 11.36%, and seal strength 4.06 MPa) compared to annealed and native starch films. ANN starch increased the elongation (9.36%) with lower solubility (17.31%) and WVP (0.65 g mm m(-2) h(-1) kPa(-1)) of the starch films compared to the native starch. Also, the result shows that the potato starch-based films biodegraded within 15 days. The developed biodegradable packaging films could meet various packaging requirements using physically modified potato starch which has better film forming properties and is also eco-friendly.