响应面法优化纳米SiOx /蛋清蛋白复合膜的制备工艺

以蛋清蛋白为原料，固定纳米SiOx的添加量，用流延法制备分散均匀的纳米级复合膜。采用单因素试验和响应面分析法，优化了复合膜的制备工艺。以蛋清蛋白添加量、增塑剂添加量、增强剂添加量和交联剂添加量为试验因素，以拉伸强度、断裂伸长率及水蒸气透过系数为响应值，建立了拉伸强度、断裂伸长率及水蒸气透过系数的回归模型，优化的工艺条件为蛋清蛋白添加量8g/100mL、增塑剂添加量3.09g/100mL、增强剂添加量0.55g/100mL、交联剂添加量0.71g/100mL，在此条件下复合膜各性能的预测值分别为3.569MPa、59.784%、5.367g·mm/(m2·d·kPa)，验证值为(3.492±0.183)MPa、(58.300±2.415)%、(5.570±0.077)g·mm/(m2·d·kPa)，与之接近，优化结果可靠。

Optimization of Preparation Process for Nano-SiOx /Albumin Complex Film by Response Surface Methodology

Using albumin as raw material and fixing nano-SiOx addition amount, nano-composite films were achieved through casting technique. Single factor and response surface tests were used to explore the optimal preparation process of composite film. Regression models of tensile strength (TS), elongation (E) and water vapor permeability (WVP) were established using albumin content, plasticizer content, intensifier content and crosslinker content as response factors. The optimal preparation conditions were albumin content of 8 g/100 mL, plasticizer content of 3.09 g/100 mL, intensifier content of 0.55 g/100 mL and cross-linker content of 0.71 g/100 mL. Under the optimal conditions, the properties of composite films were (3.492 ± 0.183) MPa, (58.300 ± 2.415)% and (5.570 ± 0.077) g?mm/(m2?d?kPa), which were close to the predicted values.