魔芋葡甘聚糖/乙基纤维素复合膜配方优化及其在蜂蜜包装中的应用

研究了魔芋葡甘聚糖（KGM）和乙基纤维素（EC）复合膜最优配方，并探究KGM/EC膜在蜂蜜包装中的应用。以KGM、EC和癸二酸二丁酯（DBS）为基材，以水和乙酸乙酯作为溶剂制备KGM/EC膜，在单因素实验的基础上，采用Miscellaneous试验设计结合响应面分析法优化KGM/EC复合膜配方，结果表明，复合膜最佳配方为KGM含量为70%，EC含量为30%，DBS含量为8%时，制备的KGM/EC复合膜拉伸强度最大为64.56 MPa。在此基础上，探究了KGM/EC膜的热封条件，并将膜应用于蜂蜜包装，结果表明，利用2% KGM溶胶作为胶粘剂对KGM/EC膜热封14 s，膜封口强度达最大值4.4 N/15 mm，蜂蜜包装袋在25℃和RH 50%±5%条件下存放22 d，达到水蒸气解吸平衡，失重率为9.3%，蜂蜜中未检出微生物菌落。综上，KGM/EC复合膜可应用于蜂蜜包装。

Formulation Optimization of Konjac Glucomannan-Ethyl Cellulose Composite Film and Its Application in Honey Packaging

In order to study formulation optimization of konjac glucomannan(KGM)and ethyl cellulose(EC)composite film and its application to honey packaging,KGM,EC,and dibutyl glycerate(DBS)were used as raw materials,and water and ethyl acetate as the solvent to prepare films,and formulations optimization of the film was tested by the single factor and response surface methodology in conjunction with miscellaneous design.The result showed that the optimal formulation of the composite film was composed of 70%KGM,30%EC,and 8%DBS,and the prepared film had the maximum tensile strength of 64.56 MPa.Based on this,investigating the heat sealing conditions of KGM/EC film and applying the film to honey packaging,the result showed that the film reached a maximum sealing strength of 4.4 N/15 mm using 2%KGM sol as an adhesive to heat seal KGM/EC film for 14 s.The honey packaging bag was stored at 25°C and 50%±5%relative humidity for 22 days to achieve water vapor adsorption and desorption balance,and the weight loss rate was 9.3%.No microbial colonies in honey were detected.In summary,the KGM/EC composite film has potential application in honey packaging.