▎ 摘　　要

NOVELTY - Preparing composite fiber warp knitted fabric comprises (i) adding 8-12 g natural graphite powder and 8-12 g sodium nitrate into beaker, slowly pouring 25-35 ml sulfuric acid solution into the beaker, and slowly adding potassium permanganate powder, (ii) mixing graphene oxide dispersion with 98% formic acid liquid, and placing spinning solution in the plastic injector with spinneret, (iii) taking 1-3 g of polyvinyl alcohol powder and dissolving it in 30 ml of distilled water, (iv) dissolving the polyvinyl alcohol powder of 3-8 g in the graphene oxide dispersion liquid, and collecting the fibers on the drum receiving device covered with aluminum foil to obtain graphene oxide-PVA fibers, (v) combining the graphene oxide-PVA fiber with polyester DTY elastic yarn and T800, and (vi) entering the grey cloth into the dyeing factory, and drying at low temperature. USE - The method is useful in textile field. ADVANTAGE - The textile of graphene material is conductive, antistatic, anti-ultraviolet, antibacterial, special protection and intelligent fabric application is wide. The polyvinyl alcohol (PVA) contains rich hydroxy, the water vapor molecule can be exhaled by human body to form hydrogen bond and fix the water molecule. The graphene material has unique sheet shape such that the PVA is embedded with it, which can increase the pendant feeling, which is excellent in the cloth of the anti-crease property. The method has simple operation, controllable technique, is economical, green and safe, and can continuously prepare composite fiber warp knitting process. DETAILED DESCRIPTION - Preparing composite fiber warp knitted fabric comprises (i) adding 8-12 g natural graphite powder and 8-12 g sodium nitrate into beaker, slowly pouring 25-35 ml sulfuric acid solution into the beaker under the condition of keeping low temperature stirring, fully mixing with the natural graphite powder, slowly adding 20-30 g potassium permanganate powder, changing the ice bath into oil bath after finishing feeding for 30 minutes, raising the temperature to 35℃, keeping for 5-6 hours, adding 300-400 ml distilled water into the mixing system during the period, and raising the oil bath temperature to 95℃ and keeping for 15-20 minutes, (ii) mixing graphene oxide dispersion with 98% formic acid liquid, stirring at room temperature with magnetic stirrer to completely dissolve, preparing spinning solution with mass percentage of 10-30% on the electrostatic spinning device, and placing spinning solution in the plastic injector with spinneret, (iii) taking 1-3 g of polyvinyl alcohol powder and dissolving it in 30 ml of distilled water, placing on constant temperature heating stirrer after swelling for 12 hours, heating and stirring at 70-80℃, placing at room temperature for cooling and defoaming to obtain uniform and transparent polyvinyl alcohol (PVA) gel solution, introducing the PVA solution cooled to room temperature into disposable syringe with specification of 10 ml, electrospinning, and collecting the fibers on drum receiving device covered with aluminum foil to obtain PVA fibers, (iv) dissolving the polyvinyl alcohol powder of 3-8 g in the graphene oxide dispersion liquid, continuously stirring for 2-4 hours at 90-110℃ until the polyvinyl alcohol is completely dissolved, dispersing sodium chloride powder in the same mixed solvent after being cooled to room temperature, ultrasonically processing for 30-60 minutes, allowing to stand for moment to obtain graphene oxide-PVA suspension, introducing mixed solution cooled to room temperature into disposable syringe with specification of 10 ml, and collecting the fibers on the drum receiving device covered with aluminum foil to obtain graphene oxide-PVA fibers, (v) combining the graphene oxide-PVA fiber with polyester DTY elastic yarn and T800, and using the warp knitting process for production, and (vi) entering the grey cloth into the dyeing factory, carrying out horizontal adjustment, pre-shrinking the cylinder, performing the machine cylinder dyeing, drying at low temperature, adding additives (150-200℃ on the setting machine, speed 20-40 yards), and obtaining the finished product.