红外辐照对魔芋葡甘聚糖膜力学性能的影响

以魔芋葡甘聚糖(KGM)粉末为研究对象,分别以分子量、水分含量的内在性质和红外辐照温度、时间、强度外部条件为参考因子,考察其与KGM溶胶成膜后力学性能的相关性,并通过扫描电镜分析,观察膜截面的微观形貌.实验结果表明:经红外处理,KGM膜力学性能的下降百分比与分子量呈明显线性正相关,与水分含量呈负相关;较高辐照温度、光强度和较长辐照时间显著破坏膜的力学性能;膜截面的有序完整片层破坏成碎裂小块和多孔结构.合理选择高品质KGM,控制红外辐照条件,可改善KGM膜的力学性能.

Effect of Infrared Radiation on Mechanical Properties of Konjac Glucomannan Films

Using konjac glucomannan powder as object,the correlation of molecular weight,moisture content,irradiation temperature,time,and strength with mechanical properties of KGM films was studied.The cross-section morphology of KGM films was observed using scanning electron microscopy.The results showed that after infrared treatment,percentage decline in mechanical properties of films showed a linear positive correlation with molecular weight of KGM,and a linear negative correlation with water content.High infrared irradiation temperature,strength,and time could damage the mechanical properties of films,and the complete of lamellar fragmentation on films cross-section destructed into small pieces and porous structure.Using high quality KGM can improve the mechanical properties of KGM films under controlled infrared irradiation conditions.