▎ 摘　　要

NOVELTY - Anti-electromagnetic interference flange comprises 60-80 pts. wt. modified polyester polymer, 30-40 pts. wt. rare metal oxide nanoparticles, 20-30 pts. wt. graphene embedded Bacillus subtilis extract, 30-40 pts. wt. NiCrMoGe nickel-based alloy powder, 10-15 pts. wt. hydroxymethyl nanocellulose, 3-5 pts. wt. decabromodiphenyl ether, 0.5-1 pts. wt. ammonium persulfate, 1-3 pts. wt. silane coupling agent, 10-15 pts. wt. modified silane (MS) as binder, and 8-12 pts. wt. polycarboxylic acid dispersant. USE - Anti-electromagnetic interference flange. ADVANTAGE - The anti-electromagnetic interference flange helps in improving overall shielding effectiveness of final flange material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing anti-electromagnetic interference flange, which involves: (A) dissolving hydroxymethyl nanocellulose in 100-150 mL distilled water, adding decabromodiphenyl ether, and ammonium persulfate, and using magnetic stirrer to stir at 80-100 rotation per minute, 45-50 degrees C to modify hydroxymethyl nanocellulose to obtain brominated hydroxymethyl nanocellulose solution; (B) adding rare metal oxide nanoparticles to brominated hydroxymethyl nanocellulose solution, adding silane coupling agent at 150-190 rotation per minute, stirring at 100-120 degrees C to obtain precursor solution of brominated hydroxymethyl nanocellulose doped with rare metal oxide nanoparticles; (C) allowing to stand in dark at room temperature, filtering with 5-10 mu m filter membrane, where surface deposits on filter membrane are cleaned 2 to 3 times with ethanol to obtain rare metal oxide nanoparticles doped Of brominated hydroxymethyl nanocellulose; (D) dissolving graphene-embedded Bacillus subtilis extract in ethanol/acetone mixed solution, oscillating ultrasonically at frequency of 30-40 Hertz for 15 to 20 minutes, and then adding modified polyester polymer, MS-modified silane, brominated hydroxymethyl nanocellulose doped with rare metal oxide nanoparticles, which gradually cooled to temperature of - 5 degrees C/minute - 8-- 5 degrees C, after stirring at 30-50 rotation per minute for 10 minutes, adding NiCrMoGe nickel-based alloy powder, polycarboxylic acid dispersant at 5 degrees C/minute, where rate of heating gradually increased to 25-28 degrees C, and after stirring at 30-50 rotation per minute for 10 minutes, obtaining anti-electromagnetic interference flange material; (E) smelting in nitrogen atmosphere at 100-150 degrees C to obtain flange ingot blank, and polishing surface defects of blank; (F) using flange ingot blank for first draw forging at 140-180 degrees C with hydraulic press, and then cooled to 15-20 degrees C to obtain first forging blank; (G) subjecting first forging billet to 4 to 5 times of forging billet using hydraulic press under condition of 30-40 degrees C to obtain second forging billet, and heating second forging billet at 40-50 degrees C to perform second draw forging to obtain third forging billet, placing third forging billet into mold, placing into hydraulic press for one shot at 50-60 degrees C, which is all carried out in nitrogen atmosphere; and (H) cooling naturally to obtain flange against electromagnetic interference.