TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The reducing agent used in (a) comprises at least one of zinc powder, magnesium powder, iron powder, tin(II)chloride, lithium aluminum hydride, aqueous solution of sodium borohydride and hydrazine hydrate/Pd-C. The inert atmosphere of (a) comprises nitrogen gas atmosphere. The reducing agent is at least one comprising sodium borohydride or sodium borohydride aqueous solution. The mass concentration of sodium borohydride aqueous solution in (a) is 5-50%, preferably 5-20%. The mass concentration of the reducing agent in the sol is 0.01-0.25%, preferably 0.15%.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent used in (a) comprises at least one of acetone, methanol, ethanol, water, acetonitrile, dimethyl formamide, dimethyl acetamide, dimethyl sulfoxide, sulfobenzide, sulfolane and N-methylpyrrolidone. The catalyst used in (b) comprises at least one of trimethylamine, triethylamine, triphenylphosphine, pyrrole, pyridine and quinoline. The epoxy resin used in (b) comprises at least one of bisphenol A epoxy resins, glycidyl ether, phosphorus-containing epoxy resins, 1,4-butanediol diglycidyl ether, tetraglycidyl ether 4,4'-diaminodiphenylmethane neopentyl glycol diglycidyl ether, p-(2,3-epoxypropoxy)-N,N-di(2,3-epoxy propoxy)aniline, tetramethylolmethane glycidyl ether, 3,3',5,5'-tetramethyl biphenyl bisphenol diglycidyl ether, 1,6-hexanediol diglycidyl ether, 1,4-di(2',3'-epoxypropoxy)perfluorocyclobutane, di(7-oxa-bicyclo(4.1.0)3-heptamethyl)hexanediol ester, 1,4-di((glycidyl oxy) methyl) cyclohexane, tetrahydro phthalazinedione, diglycidyl ether, cyclohexane-1,2-dihydroxy acid diglycidyl ether and 4,5-epoxy tetrahydro phthalazinedione diglycidyl ether. The organic solvent in the organic solution of the sulfonating polyaryletherketone with hydroxy functionalization comprises at least one of dimethylformamide, dimethylacetamide, dimethyl sulfoxide or N-methyl pyrrolidone.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polyaryletherketone used in (a) has a sulfonic acid substituent group on the molecular chain and is an aromatic polymer having carbonyl and ether bond on the main chain. The mass concentration of the organic solution of the sulfonating polyaryletherketone with hydroxy functionalization is 5-20%, preferably 10%. The polyaryletherketone used in (a) comprises at least one of polyether ketone, polyether-ether-ketone, polyether-ketone-ketone, polyether-ether-ketone-ketone, polyether-ketone-ether-ketone-ketone, polyether-ether-ketone-sulfone and polyether-ether-ketone-ketone-sulfone. The sulfonating degree of the sulfonating polyaryletherketone polymer in (a) is 30-90%, preferably 75%. The mass ratio of the sulfonating polyaryletherketone polymer to the reducing agent in (a) is 120:1 to 40:1, preferably 60:1. The mass concentration of the sulfonating polyaryletherketone polymer in the sol of (a) is 5-20%, preferably 10%. The mass ratio of the catalyst to the organic solution of the sulfonating polyaryletherketone with hydroxy functionalization to the epoxy resin in (b) is 1-3:1000 to 3000: 80-120. The reaction time in (a) is 12-36 hours, preferably 24 hours and the reaction temperature is 70-150 degrees C, preferably 80 degrees C.