2023, 43(2): 77-86. doi: 10.3969/j.issn.1673-9159.2023.02.010
关键词: 3D打印 , 相行为 , 流变特性 , 分子间作用力 , 虾肉糜 , 交联淀粉
Keywords: 3D printing , phase behavior , rheological properties , intermolecular forces , shrimp surimi , cross-linked starch
【目的】分析交联淀粉与虾肉糜不同比例混合时3D打印稳定性的变化,阐明交联淀粉改善虾肉糜3D打印效果的机制。【方法】以不同比例虾肉糜-交联淀粉的物理共混体系为研究对象,分别测定其相行为特征、3D可打印性、流变特性、微观结构和分子间作用力。【结果】当以虾肉糜与交联淀粉的质量比80∶20进行物理混合形成共混体系时,离子键、疏水相互作用的增加和氢键、二硫键的减少,驱动虾肉糜将交联淀粉包裹于内部形成连续相,使共混体系的稠度系数K和流变单元之间相互作用强度AF增加,改善了物料的流动性和自支撑能力,3D打印精确性和稳定性分别为94.78%和97.2%。【结论】交联淀粉与虾肉糜共混体系在分子间作用力的驱动下,改善了体系的流变特性,使物料能够流畅地进行3D打印并最大程度保持其设计结构特征。当虾肉糜与交联淀粉质量比为80∶20时,物料的3D打印效果最佳。
【目的】分析交联淀粉与虾肉糜不同比例混合时3D打印稳定性的变化,阐明交联淀粉改善虾肉糜3D打印效果的机制。【方法】以不同比例虾肉糜-交联淀粉的物理共混体系为研究对象,分别测定其相行为特征、3D可打印性、流变特性、微观结构和分子间作用力。【结果】当以虾肉糜与交联淀粉的质量比80∶20进行物理混合形成共混体系时,离子键、疏水相互作用的增加和氢键、二硫键的减少,驱动虾肉糜将交联淀粉包裹于内部形成连续相,使共混体系的稠度系数K和流变单元之间相互作用强度AF增加,改善了物料的流动性和自支撑能力,3D打印精确性和稳定性分别为94.78%和97.2%。【结论】交联淀粉与虾肉糜共混体系在分子间作用力的驱动下,改善了体系的流变特性,使物料能够流畅地进行3D打印并最大程度保持其设计结构特征。当虾肉糜与交联淀粉质量比为80∶20时,物料的3D打印效果最佳。
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