TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Silicate: The cation exchange capacity of the layered silicate is 50-200 meq/100 g. The layered silicate is an acid treated fluoromica or a polyethylene glycol-intercalated silicate of smectite clay, vermiculite, halloysite or sericite. The smectite clay is montmorillonite, saponite, beidellite, nontronite, hectorite or stevensite. The nanocomposite comprises 0.05-80 weight percent of layered silicate with interlayer spacing 50 Angstrom or more.Preferred Method: The fluoromica is prepared by heating a mixture comprising 65-90 wt.% of talc and 10-35 wt.% of silicon fluoride, sodium fluoride and/or lithium fluoride. The fluoromica is treated with sulfuric acid, hydrochloric acid, nitric acid or phosphoric acid.Preferred Oxidizing Agent: The oxidizing agent is ammonium persulfate, ferric chloride, ferrous chloride or hydrogen peroxide.Preferred Protonic Acid: The protonic acid is hydrochloric acid, sulfuric acid, phosphoric acid, organic sulfonic acid or organic phosphorus-containing acids.    TECHNOLOGY FOCUS - POLYMERS - Preferred Glycol: The molecular weight of polyethylene glycol is 100-50000.Preferred Monomer: The aniline monomer is aniline, aniline hydrochloride, o-aniline sulfonic acid or m-aniline sulfonic acid. SPECIFIC COMPOUNDS - The protonic acid is dodecyl benzene sulfonic acid or methane sulfonic acid.    EXAMPLE - 2 g of polyethylene glycol-intercalated montmorillonite were added to a solution of 12 g of aniline, 18 g of methane sulfonic acid and 120 ml of deionized water. The liquid suspension was stirred and cooled to 0 degreesC. A refrigerated oxidant solution containing 24 g of ammonium persulfate in 120 ml of deionized water, was added to effect polymerization. The reaction was performed for 4 hours at 5 degreesC, by stirring at 600 rpm. Filtration, water washing and drying were performed, to obtain a montmorillonite nanocomposite. The composite was analyzed using X-ray diffraction method and it indicated that the interlayer spacing of the montmorillonite layer had a value greater than 50 Angstrom. Electrical conductivity of the composite was evaluated and found to be 0.157 S/cm. A pure polyaniline prepared under the same conditions had conductivity of 0.269 S/cm, which showed that the conductivity was not considerably decreased by the inorganic component.