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CN-121975209-A - Graphene-polyethylene composite antistatic furniture plate and preparation method thereof

CN121975209ACN 121975209 ACN121975209 ACN 121975209ACN-121975209-A

Abstract

The invention discloses a graphene-polyethylene composite antistatic furniture board and a preparation method thereof, which belong to the technical field of antistatic furniture boards, and are characterized in that firstly, epoxy-fluorine-containing crosslinked acrylate microspheres are synthesized through free radical copolymerization, fluorine-containing groups are introduced, epoxy reaction sites are reserved, ethylenediamine is utilized to carry out ring-opening amination treatment on the epoxy-fluorine-containing crosslinked acrylate microspheres to construct high-activity sites, then the high-activity sites are subjected to grafting reaction with graphene oxide and reduced by hydrazine hydrate, a strong covalent bond locking sheet layer is utilized to prevent agglomeration, meanwhile, a graphene conjugated structure is effectively repaired to remodel conductivity, so that graphene antistatic filler is formed, then the graphene antistatic filler is introduced into a polyethylene and ethylene-octene copolymer multiphase matrix, and a continuous and stable conductive path is constructed in the board through interfacial compatibilization of maleic anhydride grafted polyethylene, so that the antistatic performance is kept stable for a long time under the service conditions of bearing, friction and the like, and the graphene composite antistatic furniture board is suitable for application scenes with high requirements on electrostatic protection, such as precise electronic assembly and storage.

Inventors

  • YE YONGZHEN
  • LI NING

Assignees

  • 海太欧林集团股份有限公司

Dates

Publication Date
20260505
Application Date
20260123

Claims (10)

  1. 1. The graphene-polyethylene composite antistatic furniture board is characterized by comprising the following raw materials in parts by mass: 200-400 parts of low-density polyethylene, 100-200 parts of medium-density polyethylene, 30-50 parts of ethylene-octene copolymer, 20-40 parts of maleic anhydride grafted polyethylene, 30-50 parts of graphene composite antistatic filler, 3-6 parts of stearic acid and 2-4 parts of antioxidant 1010; the preparation process of the graphene composite antistatic filler comprises the following steps: Placing graphene oxide, amination modified hydrophobic microspheres, absolute ethyl alcohol and deionized water into a reaction kettle, performing ultrasonic dispersion for 1-2h at 25-35 ℃, reacting for 1-2h at 60-80 ℃, adding hydrazine hydrate and 25wt% ammonia water, continuously reacting for 6-8h at 80-100 ℃, filtering, washing, and freeze-drying to constant weight to obtain the graphene composite antistatic filler.
  2. 2. The graphene-polyethylene composite antistatic furniture plate according to claim 1, wherein the dosage ratio of graphene oxide, the amination modified hydrophobic microsphere, hydrazine hydrate, ammonia water, absolute ethanol and deionized water is 8-12g:50-70g:15-25g:10-15mL:300-500 mL.
  3. 3. The graphene-polyethylene composite antistatic furniture board according to claim 2, wherein the amination modified hydrophobic microsphere is prepared by the following steps: Placing the epoxy-fluorine-containing cross-linked acrylate hydrophobic microsphere and absolute ethyl alcohol in a reaction kettle, performing ultrasonic dispersion for 10-20min at 25-35 ℃, adding 30-40g of ethylenediamine, reacting for 6-8h at 60-70 ℃, filtering, washing, and freeze-drying to constant weight to obtain the amination modified hydrophobic microsphere.
  4. 4. The graphene-polyethylene composite antistatic furniture board according to claim 3, wherein the dosage ratio of the epoxy-fluorine-containing crosslinked acrylate hydrophobic microspheres, ethylenediamine and absolute ethyl alcohol is 70-90g:30-40g:300-500mL.
  5. 5. The graphene-polyethylene composite antistatic furniture board according to claim 4, wherein the epoxy-fluorine-containing crosslinked acrylate hydrophobic microspheres are prepared by: Placing polyvinylpyrrolidone, sodium dodecyl sulfonate and deionized water into a reaction kettle under the protection of nitrogen atmosphere, stirring for 20-40min at 25-35 ℃, adding methyl methacrylate, glycidyl methacrylate, dodecyl heptyl methacrylate, azodiisobutyronitrile and ethylene glycol dimethacrylate, carrying out ultrasonic treatment at the same temperature for 10-20min, heating to 60-80 ℃ for reaction for 6-8h, filtering, washing, and freeze-drying to constant weight to obtain the epoxy-fluorine-containing cross-linked acrylate hydrophobic microsphere.
  6. 6. The graphene-polyethylene composite antistatic furniture board according to claim 5, wherein the mass ratio of polyvinylpyrrolidone, sodium dodecyl sulfonate, methyl methacrylate, glycidyl methacrylate, dodecaheptyl methacrylate, azobisisobutyronitrile, ethylene glycol dimethacrylate and deionized water is 3-5:1-2:60-80:15-25:10-20:1-2:4-6:400-600.
  7. 7. The method for preparing the graphene-polyethylene composite antistatic furniture plate according to claim 1, which is characterized by comprising the following steps: placing the antistatic polyethylene composite mixed rubber particles in a polytetrafluoroethylene mould, performing hot press forming on a vulcanizing press, performing water cooling under the same pressure, releasing pressure after cooling the mould, opening the mould, and taking out the plate to obtain the graphene-polyethylene composite antistatic furniture plate.
  8. 8. The method for preparing the graphene-polyethylene composite antistatic furniture plate according to claim 7, wherein the hot press forming temperature of the press vulcanizer is 170-180 ℃ and the pressure is 10-15MPa.
  9. 9. The method for preparing the graphene-polyethylene composite antistatic furniture plate according to claim 7, wherein the antistatic polyethylene composite mixing rubber particles are prepared by the following steps: Placing the low-density polyethylene, the medium-density polyethylene, the ethylene-octene copolymer and the maleic anhydride grafted polyethylene into an internal mixer, banburying for 2-3min, adding the graphene composite antistatic filler, stearic acid and antioxidant 1010, continuously banburying for 8-10min, discharging, cooling and crushing to obtain the antistatic polyethylene composite mixed rubber particles.
  10. 10. The preparation method of the graphene-polyethylene composite antistatic furniture plate according to claim 9, wherein the temperature of the internal mixer is 160-170 ℃ and the rotating speed is 40-50r/min.

Description

Graphene-polyethylene composite antistatic furniture plate and preparation method thereof Technical Field The invention belongs to the technical field of antistatic furniture boards, and particularly relates to a graphene-polyethylene composite antistatic furniture board and a preparation method thereof. Background Polyethylene (PE) furniture boards are widely applied to places such as electronic manufacturing workshops and precision instrument laboratories due to excellent chemical stability and processability, in the actual use process, frequent contact and friction on the surfaces of the boards are extremely easy to cause static accumulation, so that dust adsorption on the surfaces can affect cleanliness, static discharge caused by serious damage can even break down sensitive electronic components, huge economic loss is caused, the traditional antistatic boards are mostly dependent on adding a large amount of carbon black or antistatic agents to endow conductive effects, but high-filling carbon black can obviously reduce the mechanical toughness of the boards, small-molecule antistatic agents are easy to precipitate and unstable in antistatic effect due to environmental humidity change, and the construction of a low-filling and long-acting stable conductive network based on novel carbon nano materials such as graphene is gradually an important development direction in the field of antistatic furniture boards along with the improvement of requirements on electrostatic protection stability and durability of the furniture boards. At present, the preparation mode of the graphene/polyethylene composite antistatic plate mainly focuses on dispersing graphene in a matrix by a melt blending method, however, because of the huge specific surface area and strong van der Waals force of the graphene, the graphene is extremely easy to agglomerate in a nonpolar polyethylene matrix, and the bonding force of two phases is weak, so that irreversible microcracks are generated in the material or surface fillers are peeled off in the process of long-term bearing, repeated vibration or surface friction of the plate, the fragile conductive paths in the material can be directly cut off due to the damage of the microstructures, and the antistatic performance is remarkably attenuated or even fails along with the use process. Therefore, how to construct a conductive network with stable structure and tight interface combination in a polyethylene matrix, and still maintain the integrity of a conductive path and the durability of antistatic performance under the dynamic mechanical conditions of bearing and repeated friction becomes a core technical problem to be solved in the field of high-performance antistatic furniture plates. Disclosure of Invention The invention aims to provide a graphene-polyethylene composite antistatic furniture board and a preparation method thereof, wherein graphene oxide and a functionalized microsphere carrier are subjected to chemical grafting and in-situ reduction, so that graphene is uniformly dispersed in a polyethylene matrix, and a continuous and stable static discharge passage is constructed, so that stable antistatic performance can be maintained under actual use conditions such as bearing, repeated friction and the like, good mechanical properties are considered, and the application requirements of electronic manufacturing, precise assembly and the like on antistatic stability and use reliability are met. The aim of the invention can be achieved by the following technical scheme: The graphene-polyethylene composite antistatic furniture plate comprises the following raw materials in parts by mass: 200-400 parts of low-density polyethylene, 100-200 parts of medium-density polyethylene, 30-50 parts of ethylene-octene copolymer, 20-40 parts of maleic anhydride grafted polyethylene, 30-50 parts of graphene composite antistatic filler, 3-6 parts of stearic acid and 2-4 parts of antioxidant 1010. Further, the preparation process of the graphene composite antistatic filler comprises the following steps: Placing graphene oxide, amination modified hydrophobic microspheres, absolute ethyl alcohol and deionized water into a reaction kettle, performing ultrasonic dispersion for 1-2h at 25-35 ℃, reacting for 1-2h at 60-80 ℃, adding hydrazine hydrate and 25wt% ammonia water, continuously reacting for 6-8h at 80-100 ℃, filtering, washing, and freeze-drying to constant weight to obtain the graphene composite antistatic filler. Further, the dosage ratio of graphene oxide, amination modified hydrophobic microsphere, hydrazine hydrate, ammonia water, absolute ethyl alcohol and deionized water is 8-12g to 50-70g to 15-25g to 10-15mL to 300-500mL. Further, the preparation process of the amination modified hydrophobic microsphere comprises the following steps: Placing the epoxy-fluorine-containing cross-linked acrylate hydrophobic microsphere and absolute ethyl alcohol in a reaction kettle, performing ultrasonic dispers