METHOD FOR PREPARING HIGH-STRENGTH AND HIGH-MODULUS POLYVINYL ALCOHOL-GRAPHENE NANO COMPOSITE FIBRES

摘要

Disclosed is a method for preparing high-strength and high-modulus polyvinyl alcohol-graphene nano composite fibres, comprising uniformly mixing graphene and polyvinyl alcohol in a mixed solvent; spinning by a gel spinning method; and carrying out hot stretching at a high ratio to obtain the high-strength and high-modulus polyvinyl alcohol-graphene nano composite fibres. The present invention has cheap raw materials, a simple production process and can easily realize industrial large-scale production. The prepared polyvinyl alcohol-graphene nano composite fibres have a tensile strength of 1.4 GPa-2.2 GPa, a Young's modulus of 36 GPa, an elongation at break of 10%, smooth surfaces of the fibres with the sections of the fibres being round, and can meet the requirements on high-strength and high-modulus polyvinyl alcohol fibres in special fields and the fields of construction and industry.