▎ 摘　　要

NOVELTY - A polyphenylene sulfide foam without skin is prepared by (i) dissolving ferric chloride hexahydrate in ethylene glycol, adding graphene oxide, ultrasonically dispersing, adding polyethylene glycol and sodium acetate, stirring, transferring to an autoclave, reacting, performing magnetic separation, washing and drying to obtain a ferromagnetic graphene oxide loaded magnetic oxide hybrid nanoparticles, (ii) adding bisphenol A type epoxy resin, fatty amine curing agent, alkali accelerant and reactive diluent to a beaker, stirring, adding graphene oxide loaded magnetic oxide hybrid nanoparticles and stirring to obtain an epoxy resin-based nanocomposite curing system and (iii) adding polyphenylene sulfide sample to an autoclave, soaking in epoxy resin-based nanocomposite curing system, curing, simultaneously inducing the orientation of the internal nanoparticles by applying magnetic field, adding to an autoclave and, placing in an oil bath. USE - As polyphenylene sulfide foam without skin. ADVANTAGE - The method utilizes the molecular structure and crystal structure characteristics of polyphenylene sulfide, high affinity and strong interface bonding effect of epoxy resin and the high barrier property of graphene nanosheets to graft magnetic nanoparticles on the surface of graphene sheets and improves the gas barrier effect. The method constructs a high-efficiency gas barrier layer on the surface of the polyphenylene sulfide sample. The foam has open pores on the surface. The gas barrier layer has excellent toughness. DETAILED DESCRIPTION - A polyphenylene sulfide foam without skin is prepared by (i) dissolving 0.5-10 pts. wt. ferric chloride hexahydrate in 70 mL ethylene glycol, adding 1 pt. wt. graphene oxide, ultrasonically dispersing for 10 minutes-2 hours, adding 0.5-10 pts. wt. polyethylene glycol and 1-20 pts. wt. sodium acetate to the solution, stirring for 10 minutes-2 hours, transferring the composite solution to an autoclave, reacting at 180-220℃ for 2-20 hours, performing magnetic separation to separate black precipitate, washing using deionized water and ethanol several times and drying the obtained product at 30-150℃ to obtain a ferromagnetic graphene oxide loaded magnetic oxide hybrid nanoparticles, where the molecular weight of polyethylene glycol is 400-100000 g/mol, (ii) adding 100 pts. wt. bisphenol A type epoxy resin, 10-60 pts. wt. amine terminated polyether curing agent, 10-60 pts. wt. fatty amine curing agent, 1-20 pts. wt. alkali accelerant and 10-80 pts. wt. reactive diluent sequentially to a beaker, stirring uniformly, adding 1 pt. wt. graphene oxide loaded magnetic oxide hybrid nanoparticles and stirring uniformly to obtain an epoxy resin-based nanocomposite curing system, where the epoxy resin-based nanocomposite curing system is prepared at room temperature, the amine terminated polyether curing agent is amine terminated polyoxypropylene ethers with a molecular weight of 200-1000 g/mol or amine terminated polyoxyethylene ethers with a molecular weight of 200-1000 g/mol, the fatty amine curing agent is triethanolamine, ethylenediamine or triethylenetetramine, the alkali accelerant is phenol, resorcinol or 2,4,6-tri(dimethylamino)phenol and the diluent is allyl glycidyl ether, propylene oxide butyl ether or propylene oxide phenyl ether and (iii) adding polyphenylene sulfide sample to an autoclave at 8-20 MPa under the condition of 35-80℃ for absorbing carbon dioxide and saturating for 1-20 hours, taking out from the autoclave, soaking in the pre-prepared epoxy resin-based nanocomposite curing system, curing at 30-80℃ for 10-100 minutes, simultaneously inducing the orientation of the internal graphene oxide loaded magnetic oxide hybrid nanoparticles of the epoxy resin by applying the magnetic field, adding polyphenylene sulfide sample coated with epoxy resin-based nanocomposite barrier layer into an autoclave for continuously absorbing carbon dioxide, cooling to 30-80℃ to finish the fast pressure relief process, taking out the sample and placing in an oil bath at 100-260℃ for rapid heating and foaming and removing the surface epoxy resin-based nanocomposite barrier layer.