木薯膳食纤维可食性包装膜制备与性能研究

Preparation and Properties of Edible Packaging Film by Cassava Dietary Fiber

中文关键词: 木薯渣  膳食纤维  可食包装膜  性能测试  环保

英文关键词: cassava residues  dietary fiber  edible packaging film  performance testing  environmental-friendly

中文摘要:

      目的 制备一种以木薯渣为原料的可食性包装纸膜，并检测其综合性能，以期制备出低成本、性能优异且绿色环保的包装纸膜。方法 采用物理-酶解法提取膳食纤维，然后加入复合增稠剂、增塑剂等试剂，经脱气、铸膜、干燥成型得到环保型可食性包装膜成品，再通过力学性能检测、厚度测量、透湿度测定对薄膜性能进行表征分析。结果 在实验条件下，当膳食纤维与蒸馏水的料液比（质量比）为1∶25，复合增稠剂（羧甲基纤维素钠与海藻酸钠的质量比为62∶38）的质量占膳食纤维溶液质量的3%，甘油的质量占膳食纤维溶液质量的1.6%，蜂蜡的质量占膳食纤维溶液质量的0.6%时，薄膜的性能最好，薄膜的拉伸强度和水蒸气透过系数分别为5.19 MPa，0.712 g•mm/(m2•d•kPa)。结论 低成本的木薯渣可制备出性能良好的可食性包装膜，可以减少环境污染，节约资源，并促进资源循环利用。

英文摘要:

      The work aims to prepare a kind of edible packaging paper film with cassava residue as raw material and test its properties to prepare low-cost, excellent-performance and environmental-friendly packaging paper film. Dietary fiber was extracted by physical-enzymatic hydrolysis method, and then was degassed, cast and dried by adding complex thickeners, plasticizers, etc. to obtain the environmental-friendly edible packaging film. Next, the properties of the film were characterized and analyzed by mechanical property test, thickness measurement, and moisture permeability measurement. Under experimental conditions, when the mass ratio of dietary fiber to distilled water was 1∶25, the mass of compound thickener (sodium carboxymethyl cellulose: sodium alginate=62∶38, mass ratio) accounted for 3% of the mass of dietary fiber solution, the mass of glycerol accounted for 1.6% of the mass of dietary fiber solution, and the mass of beeswax accounted for 0.6% of the mass of dietary fiber solution, the film had the best properties, with tensile strength and water vapor permeability of 5.19 MPa and 0.712 g•mm/(m2•d•kPa), respectively. Low-cost cassava residues can be used to prepare edible packaging film with good performance, which can reduce environmental pollution, save resources and promote resource recycling.