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Application of Corn Fibers from Harvest Residues in Biocomposite Films
Journal of Polymers and the Environment ( IF 5.3 ) Pub Date : 2021-02-05 , DOI: 10.1007/s10924-021-02078-6
Gabriela Caroline Lenhani , David Fernando dos Santos , Davi Luis Koester , Barbara Biduski , Vinicius Gonçalves Deon , Martinho Machado Junior , Vânia Zanella Pinto

Agro-industrial residues are difficult to dispose of or reuse; however, it can be used to generate goods such as biodegradable packaging. The aim was to isolate and characterize fibers from corn stalks, husks, and cobs, and apply them in starch composite films (control, 5 g 100 g−1, 10 g 100 g−1, 15 g 100 g−1 and 20 g 100 g−1). The cellulose fibers were isolated by alkaline treatment and characterized by its morphology, crystallinity, and chemical structure, showing materials with different lengths and diameters, and intermediate crystallinity. The composite films were evaluated by morphological characteristics, water-solubility, water vapor permeability, chemical structure, mechanical properties, and sorption isotherms. Generally, fibers reinforcement decreased moisture adsorption. The tensile strength and Young's modulus increased adding straw fiber (5 g 100 g−1 and 10 g 100 g−1) and stalk and cob fibers (5 g 100 g−1). The use of cellulose fibers in films is important to expand and improve the current lack of biodegradable packaging.



中文翻译:

收获残渣玉米纤维在生物复合薄膜中的应用

农用工业残留物难以处置或再利用;但是,它可以用于生产可生物降解包装之类的商品。目的是从玉米秸秆,稻壳和玉米穗轴中分离和表征纤维,并将其应用于淀粉复合膜(对照:5 g 100 g -1,10 g 100 g -1,15 g 100 g -1和20 g 100克-1)。通过碱处理分离纤维素纤维,并以其形态,结晶度和化学结构为特征,显示出具有不同长度和直径以及中间结晶度的材料。通过形态特征,水溶性,水蒸气渗透性,化学结构,机械性能和吸附等温线来评价复合膜。通常,纤维增强降低了水分吸收。加入秸秆纤维(5 g 100 g -1和10 g 100 g -1)和茎秆和穗轴纤维(5 g 100 g -1)可提高抗张强度和杨氏模量。在薄膜中使用纤维素纤维对于扩大和改善目前缺乏可生物降解包装的重要性。

更新日期:2021-02-05
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