玉米秸秆纳米纤维素-淀粉膜的制备工艺优化及性能分析

本研究利用玉米秸秆纳米纤维素、玉米秸秆淀粉等作为成膜基材，通过共混流延法制备玉米秸秆纳米纤维素-淀粉膜。通过单因素实验和正交试验，对制备的纳米纤维素-淀粉膜的性能进行测定，考察各成膜基材对纳米纤维素-淀粉膜的机械性能、透湿系数、透光率、水溶性和透氧系数的影响，最终确定成膜液最佳配方组合:淀粉10.0%（W/V）、纳米纤维素5.0%（W/V）、羧甲基纤维素钠1.6%（W/V）、甘油2.3%（V/V）。在最优工艺条件下制备的纳米纤维素-淀粉膜综合效果最佳，并测得性能指标，膜厚（0.063±0.050）mm，抗拉强度14.92 MPa，断裂伸长率64.75%，透湿系数为2.19×10?12 g·m/m2·s·Pa，透光率87.60%，溶解时间97.00 s，透氧系数2.75×10?14 cm3·cm/cm2·s·Pa。

Preparation Process Optimization and Property Analysis of Nano-cellulose-Starch Film Based on Corn Stalk

In this work, corn stalk nano-cellulose and corn stalk starch were used as film-forming substrates to prepare corn stalk nano-cellulose-starch film by blending-flow casting method. The properties of nano-cellulose-starch film were determined on the basis of single factor and orthogonal test. The effects of each material of film-forming on mechanical properties, moisture permeability, light transmittance, water solubility and oxygen permeability of nano-cellulose-starch film were investigated. Finally, the optimal formula combination of film-forming liquid was determined as follows: The starch was 10.0% (W/V), nano-cellulose was 5% (W/V), sodium carboxymethyl cellulose was 1.6% (W/V) and glycerol was 2.3% (V/V). Under optimal conditions, the nano-cellulose-starch film has the best comprehensive effect. The performance indexes were measured, and the membrane thickness was (0.063±0.050) mm, tensile strength was 14.92 MPa, elongation at break was 64.75%, moisture permeability coefficient was 2.19×10?12 g·m/m2·s·Pa, light transmittance was 87.60%, hydrolysis time was 97.00 s, oxygen permeability was 2.75×10?14 cm3·cm/cm2·s·Pa.