Abstract
Herein, a small amount of cellulose nanofiber (CNF) was introduced in graphene oxide (GO) spinning dope to improve the property of graphene fiber. It was found that the one-dimensional CNF could absorb on the GO sheets, and enhance the inter-layer interaction as well as the connection between GO sheets, resulting in an easy formation of lyotropic liquid crystalline structure and a better orientation of the resultant fiber. A large enhancement of tensile strength, modulus, and elongation of GO/CNF hybrid fiber has been achieved. After chemical reduction of GO, the fiber still maintains its original mechanical properties but with high conductivity and improved hydrophilicity. Our work further demonstrates the importance of a stable lyotropic liquid crystalline structure of GO dope in the spinning of graphene fiber and provides a facile way to produce graphene fiber with good performance.
Highlights
Graphene, one of the most attractive materials of twenty-first century, with its unique structure, intrinsic mechanical strength, compelling heat, and electrical conductivity has received persistent attention.[1]
Our work further demonstrates the importance of a stable lyotropic liquid crystalline structure of graphene oxide (GO) dope in the spinning of graphene fiber and provides a facile way to produce graphene fiber with good performance
Graphene fiber can be wet-spun from the liquid crystalline behavior of the GO, the pre-ordered GO sheets is the premise for the continuous wet-spinning of the fiber.[5,26]
Summary
One of the most attractive materials of twenty-first century, with its unique structure, intrinsic mechanical strength, compelling heat, and electrical conductivity has received persistent attention.[1]. The reduced GO–CNF (r-GO-CNF) fiber still maintains the original mechanical properties of GO–CNF fibers, but with high conductivity and improved hydrophilicity.
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