Preparation of PI/rGO composite yarn based on wet electrospinning technology and its performance
In order to prepare high-performance graphene-based yams,polyamide acid/graphene oxide(PAA/GO)composite yarn is first constructed by wet electrospinning technology and then subjected to high-temperature treatment to transform into polyimide/reduced graphene oxide(PI/rGO)composite yarn,with polyamide acid(PAA)as spinning polymer and graphene oxide(GO)aqueous dispersion as coagulation bath.The morphology and chemical structure of PI/rGO composite yarns are characterized.The mechanical and electrical properties of PI/rGO composite yarns are researched,and the electrical properties are also tested for practical application.The results show that the PI/rGO composite yam has excellent morphology,outstanding mechanical and prominent electrical properties.The elongation at break,the breaking strength,and the resistance of PI/rGO composite yarn respectively reach to 16.5％,21.06 MPa,and 210 kΩ.When the GO concentration is 10 mg/mL,which could be used alone or woven into fabrics as wires to light LED bulbs.Furthermore,PI/rGO composite yarns also exhibit ideal double layer capacitance characteristics and electrochemical properties.
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