Drying substances, preparation and use thereof

摘要

There is provided herein a dryer polymer substance adapted to pervaporate a fluid (such as water, water vapor or both), the polymer substance includes: a porous support member having a plurality of pores, wherein at least a portion of the pores are filled with a cross-linked co-polymer comprising (i) a cationic monomer and an anionic monomer, (ii) a zwitterionic monomer, or a combination thereof. The substance may include a membrane or a tube. There is further provided herein a process for the preparation of a dryer polymer substance adapted to pervaporate a fluid (such as water, water vapor or both), the process includes impregnating into at least a portion of the pores of a porous support member a solution which comprises: (i) a cationic monomer and an anionic monomer, (ii) a zwitterionic monomer, or a combination of (i) and (ii), graft co-polymerizing the anionic monomer and the cationic monomer and/or the zwitterionic monomer within at least a portion of the pores to form a co-polymer, and cross-linking the co-polymer, such that the pores of the support member are at least partially grafted with a cross-linked co-polymer bound to the support member.

主权项

1. A dryer polymer substance adapted to pervaporate water, water vapor or both from a gas while maintaining the concentration of CO2, O2 or both in said gas, the polymer substance comprising: an ammonium persulfate (APS) hydrophelized, surface activated porous support member having a plurality of pores, wherein the porous support member comprises polyether sulphone (PES); and wherein at least a portion of the pores comprise grafted cross-linked co-polymer formed from [2-(methacryloxy)ethyl]trimethylammonium chloride (MAETAC), 2-acrylamido-2-methyl-1-propanesulfonic acid and N,N′-methylenebisacrylamide (MBAA); wherein when the dryer substance is a dryer tube with an internal diameter of 1.0±0.1 millimeter (mm); an outer diameter of 1.24±0.02 mm and a length of 50 mm, the tube has a water evaporation rate of over 120 micro-liter/hour at a temperature of 22° C. and at 34% humidity.