Modified ion exchange resin(IER) was obtained by impregnating IER into the saturated LiCl or MgCl2solution,filtering,washing and drying sequentially.The desiccant coating was produced by means of electrostatic spraying and thermocuring the mixture of the pulverized modified IER and powder coating on aluminum foil surface of finned tube heat exchanger.XRD spectra showed that IER structure had no obvious change after modification.SEM images revealed that the desiccant coating could be uniformly and closely di...