Reddy Narendra, Yang Yiqi
Department of Textiles, Clothing & Design and Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska, 68583-0802, USA.
J Agric Food Chem. 2007 Oct 17;55(21):8570-5. doi: 10.1021/jf071470g. Epub 2007 Sep 26.
Long natural cellulose fibers with properties suitable for textile and composite applications have been obtained from wheat straw. This study aims to understand the potential of using wheat straw as a source for long natural cellulose fibers for textile, composite and other fibrous applications. The presence of wax on the outer layer of the straw and a unique zip-like structure that locks individual fibers makes it difficult to obtain fibers from wheat straw using the common methods of fiber extraction. A novel pretreatment with detergent and mechanical force followed by an alkaline treatment was used to obtain high quality fiber bundles. The structure and properties of the fibers are reported in comparison to common cellulose fibers, cotton, linen, and kenaf. Wheat straw fibers have coarser (wider width) single cells and lower crystallinity than cotton, linen, and kenaf. The breaking tenacity (force at break) of wheat straw fibers is similar to kenaf but lower than that of cotton and linen, % breaking elongation is similar to linen and kenaf but lower than cotton, and Young's modulus of the fibers is similar to cotton but lower than that of linen and kenaf.
已从小麦秸秆中获得了具有适合纺织和复合材料应用特性的长天然纤维素纤维。本研究旨在了解将小麦秸秆用作纺织、复合材料及其他纤维应用的长天然纤维素纤维来源的潜力。秸秆外层存在蜡质以及一种独特的拉链状结构（该结构将单根纤维锁住），这使得使用常规纤维提取方法从小麦秸秆中获取纤维变得困难。采用一种先用洗涤剂和机械力进行的新型预处理，随后进行碱处理的方法来获得高质量的纤维束。与普通纤维素纤维、棉花、亚麻和红麻相比，报告了这些纤维的结构和性能。小麦秸秆纤维的单细胞比棉花、亚麻和红麻更粗（宽度更宽）且结晶度更低。小麦秸秆纤维的断裂强度（断裂时的力）与红麻相似，但低于棉花和亚麻，断裂伸长率与亚麻和红麻相似但低于棉花，并且纤维的杨氏模量与棉花相似但低于亚麻和红麻。
