Abstract The effects of acid hydrolysis treatment on the properties of pea starch (PS) and PS-based films by solution casting were investigated. Native pea starch granules were partially hydrolyzed with 2% hydrochloric acid for 0.5, 1.0, 1.5, 2.0, and 2.5 h. Acid hydrolysis treatment lowered the molecular weight of amylopectin from 27.94 × 107 g/mol for native PS to 9.16 × 107 g/mol for the sample of 2.5 h hydrolysis, but had no obvious effect on the molecular weight of amylose. Micrographs of the hydrolysis starch granules exhibited surface erosion and fragmentation. The relative crystallinity slightly increased, whereas the peak, trough, final and setback viscosities decreased during acid hydrolysis. After acid hydrolysis treatment, the tensile strength of the pea starch film significantly increased and reached a maximum of 21.21 MPa with 2.0 h of acid hydrolysis.

中文翻译：

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酸水解对豌豆淀粉理化性质及其成膜能力的影响

摘要 研究了酸水解处理对豌豆淀粉 (PS) 和溶液浇铸的 PS 基薄膜性能的影响。天然豌豆淀粉颗粒用 2% 的盐酸部分水解 0.5、1.0、1.5、2.0 和 2.5 小时。酸水解处理使支链淀粉的分子量从天然PS的27.94×107 g/mol降低到2.5 h水解样品的9.16×107 g/mol，但对直链淀粉的分子量没有明显影响。水解淀粉颗粒的显微照片表现出表面侵蚀和破碎。在酸水解过程中，相对结晶度略有增加，而峰值、谷值、最终和回退粘度降低。酸水解处理后，豌豆淀粉膜的拉伸强度显着增加，最大达到 21.21 MPa，2.