Effects of silanization on the surface properties and hydrocarbon adsorption isotherms of cardboard were investigated via inverse gas chromatography (IGC), Fourier-transform infrared spectroscopy (FTIR), and atomic absorption spectroscopy. Three different silanized cardboard samples (CH3Si-CB, (CH3)2Si-CB, and CH3PhSi-CB) were prepared by the reaction of cardboard and trichloromethylsilane (TCMS), dichlorodimethylsilane (DCDMS), and dichloromethylphenylsilane (DCMPS), respectively, in toluene. The presence of methyl, dimethyl, and methylphenyl groups in the silanized cardboard samples were identified by FTIR spectra and atomic absorption measurements. IGC measurements were conducted to measure molar adsorption thermodynamics and surface energy of torrefied cardboard samples using a series of n-alkanes, benzene, toluene, and p-xylene, and other polar probes. In this presentation, molar adsorption enthalpies (n-alkanes, benzene, toluene, and p-xylene), dispersive and specific surface energies, and adsorption isotherms of benzene, toluene, and p-xylene measured on three silanized carboard samples are presented. Molar adsorption enthalpies of hydrocarbons, surface energies, and adsorption isotheres are compared to those measured on cardboard and effects of silanization are discussed.

Preparation of silanized cardboard samples and characterization of their surface properties and hydrocarbon adsorption isotherms

ACS Spring 2022

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