{
    "protocol": "The preparation of antifog hard coatings involved the polycondensation of silane coupling agents bearing amino or glycidyl groups under hydrolytic conditions (sol-gel reaction). The development of antifog hard coatings based on polyamides was done using POSS with amino and carboxy groups on side chains, employing a condensation agent, 1-(3-(dimethylamino)propyl)-3-ethylcarbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS). The reaction was conducted by heating at 80 °C in dehydrated dimethyl sulfoxide (DMSO) for 12 hours.Preparation of Carboxy-Functionalized Rod-like PolySQ: Add 60 mL of 2.0 mol L^{-1} NaOH aqueous solution to 8.871 g of CETES while stirring at room temperature for 15 hours. Heat the mixture at ca. 50 °C in an open system until the solvent completely evaporates. Maintain the crude product at 100 °C in an oven for 2 hours. Add 120 mL of 1.0 mol L^{-1} HCl aqueous solution at room temperature and heat at ca. 50 °C until the solvent evaporates (ca. 6 hours). Add 25 mL of water to the resulting solid, stir for 1 minute, and perform immediate suction filtration to eliminate generated sodium chloride. Repeat this suction filtration three times. Dry the resulting solid under reduced pressure at room temperature to yield a white powdered product (5.304 g, quantitative yield). Preparation of POSS-C: Add 100 mL of 0.50 mol L^{-1} HOTf aqueous solution to 4.171 g of carboxy-functionalized rod-like polySQ. Heat the solution at ca. 60 °C for 20 minutes, then stir at room temperature for 2 hours. Heat at ca. 50 °C in an open system until the solvent completely evaporates (ca. 5.5 hours). Hold the liquid in an oven at 100 °C for 2 hours. After cooling, add 8.4 mL of acetone and pour the solution into 416 mL of a mixed solvent of acetone and chloroform (1:9 v/v) and stir at room temperature for 15 hours. Separate the insoluble part by filtration and wash 5 times with acetonitrile (ca. 25 mL). Dissolve the insoluble part in ca. 25 mL of acetone, separate the acetone-soluble part using filtration, evaporate acetone, and dry under reduced pressure at room temperature to yield a white powdered product (0.707 g, yield 17%)."
}