A recently designed “industry-scale microfluidizer” (ISM) was applied to treat potato starch, then the structural and physicochemical properties of potato starch treated at different ISM pressure (30, 60, 90, and 120 MPa) were investigated. As ISM pressure increased, starch granule size was firstly increased, and subsequently declined at 120 MPa. A remarkable destruction of starch granules was observed, and all the large granules disintegrated into irregular block-like structures after treatment at 120 MPa. Both crystalline and short-range ordered structure were progressively disrupted with the increase of pressure. The structural destruction was attributed to starch gelatinization, which depended on ISM pressure. ISM treatment could arbitrarily adjust pasting viscosity and increase setback value of potato starch. Moreover, moduli and mechanical rigidity of starch pastes were enhanced by ISM treatment. These results implied that ISM treatment could be a potential choice to modify starch containing large granules at an industrial level.

Industrial relevance

Microfluidization was an available physical technique to improve functional properties of starch. However, it was difficult for conventional microfluidizer to treat starch containing big granule sizes both in laboratory and industrial scale owing to the drawbacks of devices. A recently designed “industry-scale microfluidizer” (ISM) in our laboratory could be applied to treat potato starch containing large granules. This preliminary study gave important indications that the practical industrial applications of potato starch could be widen by safe and simple microfludization technology, and ISM may be used for processing whole grains flour to obtain nutritional products.

中文翻译：

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工业规模微流化对马铃薯淀粉结构和理化性质的影响

将一种最新设计的“工业级微流化器”（ISM）用于马铃薯淀粉的处理，然后研究了在不同ISM压力（30、60、90和120 MPa）下处理的马铃薯淀粉的结构和理化性质。随着ISM压力的增加，淀粉颗粒尺寸首先增加，然后在120 MPa时减小。观察到淀粉颗粒的显着破坏，在120 MPa处理后，所有大颗粒均分解成不规则的块状结构。随着压力的增加，晶体和短程有序结构都被逐渐破坏。结构破坏归因于淀粉糊化，其取决于ISM压力。ISM处理可任意调节糊状粘度并增加马铃薯淀粉的挫折值。而且，ISM处理可提高淀粉糊的模量和机械刚度。这些结果表明，在工业水平上，ISM处理可能是改性含大颗粒淀粉的潜在选择。

行业相关性

微流化是一种可利用的物理技术，可以改善淀粉的功能特性。然而，由于装置的缺点，常规的微流化器难以在实验室和工业规模中处理包含大颗粒尺寸的淀粉。我们实验室中最新设计的“工业规模微流化器”（ISM）可用于处理含有大颗粒的马铃薯淀粉。这项初步研究提供了重要的指示，表明通过安全和简单的微流化技术可以扩大马铃薯淀粉的实际工业应用，并且ISM可以用于加工全谷物面粉以获得营养产品。