KAGAKU KOGAKU RONBUNSHU, Vol.28, No.4, 488-489, 2002
Control of polymer content profile within dried porous material wetted with aqueous polymer solution
In the conductive-convective drying of a glass particle layer wetted with aqueous polyvinylalcohol (PVA) solution, it is known that PVA content in the dried layer is higher near both the drying surface and the conductive plane. A series of experiments with a range of air temperatures at the drying surface and constant air temperature at the conductive plane showed that lower air temperature at the drying surface caused higher PVA content near the conductive plane and lower drying rate. With a low initial PVA solution content, however, a uniform profile of PVA content was observed.
Keywords:convective drying;conductive drying;aqueous polymer solution;polymer content profile;porous material