Abstract
Abstract Thick mesoporous silica (MPS) films with sufficient mechanical strength and high porosity were prepared on aluminum plates by using electrophoretic deposition (EPD) with the addition of a small amount of polyvinylbutyral (PVB, 3.5–8.0 wt%) as binder. The porosity of the MPS films was approximately 50 vol%. The film thickness could be controlled by the deposition conditions, and a thickness of ca. 50 μm is reasonable for effectively using the whole MPS film. These MPS films exhibited good water vapor adsorption-desorption properties and sufficient stability for more than 150 adsorption-desorption cycles. When used in dehumidification applications, these MPS films had a dehumidification rate of 6.3 g-H2O/g-MPS per hour, with an adsorption-desorption cycle as short as 2 min even when a low temperature of 60 °C was used to regenerate the adsorbent.
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