Zou Yiyuan, Yuan Chao, Cui Bo, Sha Haojie, Liu Pengfei, Lu Lu, Wu Zhengzong
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
J Agric Food Chem. 2021 Mar 3;69(8):2493-2500. doi: 10.1021/acs.jafc.0c06648. Epub 2021 Feb 17.
Glycerol-plasticized high-amylose corn starch/konjac glucomannan (HCS/KGM) composite films incorporated with various concentrations of β-cyclodextrin (β-CD) were prepared and investigated for structural, mechanical, and physical properties. The results of X-ray diffraction, attenuated total reflectance Fourier transform infrared spectroscopy, thermogravimetric analyses, and scanning electron microscopy indicated that β-CD excluded from the polymer chains and aggregated to form crystals during film formation, which drove HCS to interact with KGM more compactly. The thickness and transparency of the films increased after β-CD was incorporated. More associations of HCS/KGM enhanced the mechanical properties and reduced the moisture content of the films. The water vapor permeability of the HCS/KGM composite film was also improved significantly with the incorporation of β-CD. The enhanced association between biopolymers in the presence of β-CD will advance the development of a degradable active composite packaging film.
制备了含有不同浓度β-环糊精（β-CD）的甘油增塑高直链玉米淀粉/魔芋葡甘聚糖（HCS/KGM）复合薄膜，并对其结构、力学和物理性能进行了研究。X射线衍射、衰减全反射傅里叶变换红外光谱、热重分析和扫描电子显微镜结果表明，β-CD在成膜过程中从聚合物链中排出并聚集形成晶体，促使HCS与KGM更紧密地相互作用。加入β-CD后，薄膜的厚度和透明度增加。HCS/KGM之间更多的缔合增强了薄膜的力学性能并降低了其水分含量。加入β-CD后，HCS/KGM复合薄膜的水蒸气透过率也显著提高。β-CD存在下生物聚合物之间增强的缔合将推动可降解活性复合包装薄膜的发展。
