Thin film composite membranes comprising of polyamide and polydopamine for dehydration of ethylene glycol by pervaporation

Synthesis, Characterization and Application of Disodium Tetraborate Cross-Linked Polyvinyl Alcohol Membranes for Pervaporation Dehydration of Ethylene Glycol

“…Following the solution-diffusion mechanism, it is defined as the transport flux of material through the membrane per unit driving force per unit membrane thickness, given as Eq. (4) 17 (4) Where P m,i is the membrane permeability, δ is the membrane thickness and g is the activity coefficient, which may be calculated using Van Laar eqation. The mole fraction in the feed solution is denoted as x, P s is the saturated vapor pressure calculated with Antoine's equation, y is the mole fraction in the permeate and P p is the permeate pressure obtained for the component during the PV experiment.…”

“…Some of these recently used membranes include polyvinyl alcohol/hyper-branched polyester, 2 polyvinyl alcohol/polypropylene, 3 polyamide/polydopamine, 4 polybenzimidazole/polyetherimide, 5 polyvinyl alcohol-Na-zeolite mixed matrix membrane, 6 γ-alumina-Na-zeolite, 7 Na-A zeolite, 8 polyvinylamine/polyvinyl alcohol-carbon nanotube 9 and so on. Wu et al (2015) reported a novel polymer of intrinsic microporosity for the separation of EG -water with separation factor of 24.2. 4 Rao et al (2007) prepared a cross-linked chitosan membrane with a very high separation factor of 234 in the pervaporation of EG-water mixture at 30 °C.…”

“…Wu et al (2015) reported a novel polymer of intrinsic microporosity for the separation of EG -water with separation factor of 24.2. 4 Rao et al (2007) prepared a cross-linked chitosan membrane with a very high separation factor of 234 in the pervaporation of EG-water mixture at 30 °C. 10 In essence, most of these works underscore the need for the optimization of the membrane formation conditions for solute transport which is largely a function of the binding interface between active and support layers.…”

“…This results in the solidification of polyvinyl alcohol and trapping of water molecules, forming a slimy mass. Sodium borate dissolve in water to form boric acid, which then accepts a hydroxide from water to become B (OH) 4 -.…”

Thin film composite membranes with desirable support layer for MeOH/MTBE pervaporation

“…One of the major breakthroughs in the field of membrane science and technology is the development of thin film composite (TFC) membranes . Although polyamide‐based TFC membranes are generally applied in reverse osmosis and nanofiltration processes, the focus of researchers is on the PV applications of these membranes, especially in dehydrating organic solvents or organic/organic separation . The main feature of this type of membrane is the preservation of their stability and separation performance during exposure to separation processes of organic solvents.…”