▎ 摘　　要

NOVELTY - Computer noise reduction device comprises a box body, the outer plate of the box body is a hollow structure, and the outer plate is filled with noise reduction foam material, where The preparation method of noise reduction foam material includes (1) mixing 5-aminoisophthalic acid, copper trifluoromethanesulfonate, copper foam and N,N dimethylformamide in sealed reactor, sealing the reactor, filling with argon protection, heating, air-cooling, filtering, and calcining dried solid phase in argon atmosphere to obtain pretreatment, (2) soaking pretreated foamed copper with acetone to clean and remove oil, drying, preparing precursor solution in reaction vessel, where the precursor solution is tetraethyl orthosilicate, methyltriethoxysilane, cyclohexane, n-amyl alcohol and anhydrous ethanol, and adding hexadecyltrimethylammonium bromide, and (3) dispersing graphene oxide in absolute ethanol, soaking the foamed copper-silica compound in dispersion and air-cooling to normal temperature. USE - Used as computer noise reduction device. ADVANTAGE - The noise-reducing foam material has large porosity and static flow resistivity, has good noise-reducing effect, and is used for the noise-reduction box partition filler of computers or other electronic instruments; and can significantly reduce the noise generated during the operation of computers or other electronic instruments to achieve the purpose of reducing noise pollution. DESCRIPTION OF DRAWING(S) - The drawing shows the structure schematic diagram of the box body outer plate of a computer noise reduction device. 2Noise reduction foam material