Interaction energies of (1) dodecylamine, (2) CTAC, and (3) stearate with the interlayer environment of methanol preintercalated kaolinite, and the proportions of electrostatic energies Eelec and van der Waals energies EvdW accounting for the interaction energies, where A, B, and C represent the interlayer alumina surface, siloxane surface, and interlayer methanol, respectively.