Water sorption and transport in a series of polysulfones

Effect of OH group on the water vapor sorption property of adamantane-containing polymer membranes

“…The chemical structures and the physical properties of a large number of water vapor transport properties in a series of family polymers, polymer blends, and copolymers have been investigated [6][7][8][12][13][14][15][16][17][18]. However, studies on the effects of the hydrophilic OH group on the hydrophobic polymers focusing on the chemical structure have not been conducted.…”

“…Fig. 7 presents the relationship between water vapor solubilities at low and high activities in each adamantane polymer membrane as a function of the FFV with some series of family polymers, such as polyimides (PI) [6], polysulfones (PSF) [7], and polyarylates (PA) [8] for comparison. We focused on the solubility at low and high activities to investigate the effect of the membrane swelling and plasticization.…”

“…In general, a high gas/vapor barrier material is attributed to low gas/vapor diffusivity and solubility [2][3][4]. Some approaches, including polymer crystallization [5] and introduction of the hydrophobic group [6][7][8], are performed to decrease gas/vapor diffusivity and solubility.…”

Development of carboxylated TiO2 incorporated thin film nanocomposite hollow fiber membranes for flue gas dehydration

“…Water vapor exhibits very different permeation behavior as compared to other species due its very small kinetic diameter and high hydrogen bonding affinity [37]. High permeation rate of water vapor through the membrane and slower diffusion through the boundary layers causes a phenomenon well known as 'concentration polarization'.…”

The influence of binder content on the water transport properties of waterborne acrylic paints

“…Based on these values the maximum water sorption capacity of the pure copolymer was predicted as 6.43% slightly higher than the water sorption capacity of the paint films with the binder contents of 40% and 30%. A significant degree of upturn in sorption data at high activities can be due to clustering of water molecules or plasticization of the polymer matrix induced by water sorption [20]. The extent of clustering of water molecules inside the polymer matrix was determined from the Zimm and Lundberg cluster integral [18].…”