State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; Department of Food Science and Engineering, Shandong Agricultural University, Taian 271018, China.
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
Food Chem. 2024 Mar 15;436:137718. doi: 10.1016/j.foodchem.2023.137718. Epub 2023 Oct 14.
The effect of corn starch-fatty (CS-FA) complexes from varying carbon chain length and degree of unsaturation on the rheological and 3D printing properties of corn CS-FA complex gels. The CS-FA complexes with longer carbon chain lengths and lower saturation enhanced the ability of gels to bind water, promoting the formation of intermolecular hydrogen bonds. The CS-FA complexes inhibit retrogradation and increase the amount of bound water, thereby reducing the structural integrity and transforming the original skeleton structure into a flake-like structure. These changes in gel structure led to lower flow stress and storage modulus for CS-FA gels containing FAs with shorter carbon chain lengths and lower saturation, resulting in reduced "extrusion swelling" of the material and facilitating its extrusion. The decreased "extrusion swelling" of gel improved print line width and printing performance. The CS-FA complex gel-printed product with a 12-carbon chain FA has the greatest printing accuracy, thanks to its moderate G', flow stress, and viscosity. This study provides important information for the CS-FA complexes for the preparation of starch-based 3D printing materials.
不同碳链长度和不饱和度的玉米淀粉-脂肪（CS-FA）复合物对玉米 CS-FA 复合凝胶流变性和 3D 打印性能的影响。具有较长碳链长度和较低饱和度的 CS-FA 复合物增强了凝胶结合水的能力，促进了分子间氢键的形成。CS-FA 复合物抑制回生并增加结合水的量，从而降低结构完整性并将原始骨架结构转化为片状结构。凝胶结构的这些变化导致具有较短碳链长度和较低饱和度的 FA 的 CS-FA 凝胶的流动应力和储能模量降低，从而减少了材料的“挤出膨胀”，并使其易于挤出。凝胶的“挤出膨胀”减少，改善了打印线条宽度和打印性能。具有 12 个碳链 FA 的 CS-FA 复合凝胶打印产品具有最大的打印精度，这要归功于其适中的 G'、流动应力和粘度。本研究为 CS-FA 复合物在制备基于淀粉的 3D 打印材料方面提供了重要信息。
