Super‐Strong, Super‐Stiff Macrofibers with Aligned, Long Bacterial Cellulose Nanofibers

• DOI: 10.1002/adma.201702498
• Publication Date: 2017-07-21T11:08:35Z
• Authors: Sha Wang; Feng Jiang; Xu Xu; Yudi Kuang; Kun Fu; Emily Hitz; Liangbing Hu
• Keywords: Bacterial Cellulose; Specific strength; Cellulose fiber

With their impressive properties such as remarkable unit tensile strength, modulus, and resistance to heat, flame, chemical agents that normally degrade conventional macrofibers, high-performance macrofibers are now widely used in various fields including aerospace, biomedical, civil engineering, construction, protective apparel, geotextile, electronic areas. Those with a diameter of tens hundreds micrometers typically derived from polymers, gel spun fibers, modified carbon carbon-nanotube ceramic synthetic vitreous fibers. Cellulose nanofibers promising building blocks for future biomaterials textiles due high ultimate strength stiffness resulting highly ordered orientation along the fiber axis. For first time, an effective fabrication method is successfully applied involving wet-drawing wet-twisting process ultralong bacterial cellulose nanofibers. The yield record (826 MPa) Young's modulus (65.7 GPa) owing large length alignment When normalized by weight, specific macrofiber 598 MPa g-1 cm3 , which even substantially stronger than novel lightweight steel (227 ).