▎ 摘　　要

NOVELTY - A high-precision energized constant temperature test paper comprises qualitative filter paper, coating and ink dispersed on qualitative filter paper. The component ratio of coating and ink is 1:1-5. The coating is cellulose nanofiber. The ink is made of 1-5 pts. wt. graphene oxide, 1 pts. wt. cellulose nano-microcrystals, and 10-50 pts. wt. modified carbon nanotubes. USE - High-precision energized constant temperature test paper. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the test paper comprising using qualitative filter paper as raw material, and calendering qualitative filter paper at 0.5-5 MPa; preparing cellulose nanofibers by mixing 100 mL cotton pulp suspension, 0.1 g sodium bromide and 0.02 g tempo (2,2,6,6-tetramethylpiperidine oxygen radical), stirring reagents, adding 5 mL 0.15 mol/L sodium hypochlorite solution, mixing, aadjusting pH of mixed solution to 10 with diluted hydrochloric acid solution to obtain mixed reaction solution, placing mixed reaction solution in ice-water bath, stirring for 6 hours, adding 0.1 mol/L sodium hydroxide solution dropwise to maintain pH of mixed reaction solution at 10, and obtaining cellulose nanofiber solution; applying cellulose nanofiber solution on qualitative filter paper, controlling coating speed at 0.2-0.5 m/minute, and air-drying after coating; dissolving anthraquinone disulfonic acid in water, controlling concentration of anthraquinone disulfonic acid at 10-50 g/L, adding carbon nanotubes to anthraquinone disulfonic acid solution, controlling concentration of carbon nanotubes at 10-50 g/L, ultrasonically dispersing at room temperature using ultrasonic cell pulverizer at 150-300 W for 20-40 minutes, magnetic stirring at 300-600 revolutions/minute for 30-60 minute to obtain non-covalent bond modified carbon nanotubes, separating excess anthraquinone disulfonic acid by dialysis membrane with pore diameter of 0.45 m, changing water every 6 hours after dialysis for 12-36 hours, and adsorbing anthraquinone disulfonic acid on carbon nanotubes; adding mixed solution of graphene oxide and cellulose nanocrystals to modified carbon nanotube solution to obtain ink; printing filter paper with ink using Dimatix high-performance material printer, and printing conductive layer to obtain test paper; an cutting test strip to obtain constant temperature test strip.