响应面法优化KGM-TiO2复合薄膜的拉伸性能
Optimization by response surface methodology of properties of KGM-TiO2 composite films
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摘要: 以魔芋葡甘露聚糖(KGM)和纳米TiO2为原料,制备KGM/TiO2复合薄膜,研究制备工艺对复合薄膜性能的影响。以拉伸强度、断裂伸长率为评价指标,探讨了KGM溶胶浓度、甘油用量、pH、干燥温度对KGM薄膜特性的影响,在单因素实验的基础上,采用响应面分析法,优化了KGM薄膜的制备工艺,在此基础上,制备KGM/TiO2复合薄膜并考察TiO2掺杂比对复合薄膜性能的影响。建立了拉伸强度、断裂伸长率的回归模型,优化后的制备工艺条件为:KGM浓度1%、甘油添加量0.45%、pH10、干燥温度71℃。TiO2的掺入能有效提高KGM薄膜的断裂伸长率,对薄膜的力学性能有所改善,当TiO2掺杂比为0.003%时,复合薄膜性能良好。Abstract: The effects of preparing conditions of KGM-TiO2 composite films were studied. Based on tensile strength and elongation at break,the influence of the concentration of KGM sol,the amount of glycerin,pH and drying temperature of composite films were investigated. The preparation process of KGM-TiO2 composite films was optimized by single factor experiment and response surface methodology while the effects of the ratio of composite thin films doped with TiO2 was also studied. A regression model for each of the film properties was developed. The optimal preparing conditions were KGM concentration 1%,glycerin amount0.45%,pH10 and drying temperature 71℃. The incorporation of TiO2 could effectively improve the elongation at break and the mechanical propeties of KGM thin films with the best value 0.003%.
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