Water and salt transport properties of pentiptycene-containing sulfonated polysulfones for desalination membrane applications
نویسندگان
چکیده
A series of pentiptycene-containing disulfonated polysulfone copolymers (PENT-BP) were synthesized via condensation polymerization. Water and salt transport properties (solubility, diffusivity permeability) characterized for acid-form membranes (PENT-BP(H)) compared with triptycene-based sulfonated polysulfones (TRP-BP(H)) a non-iptycene-containing 4,4′-biphenol-based (BPS(H)) to investigate the effect pentiptycene on membrane performance. At comparable water content, PENT-BP(H) exhibited increased permeability due additional free volume introduced by units. Enhanced water/salt selectivity was also observed significantly higher selectivity. permeance (PwD~8×10−6cm2/s), rejection PENT-BP (H) obtained from dead-end filtration reached 91–93% at 400 psi, than that corresponding BPS(H) series. This study suggests incorporation iptycene moieties into polymer backbone is an effective strategy enhance desalination
منابع مشابه
Advances in Membrane Distillation for Water Desalination and Purification Applications
Membrane distillation is a process that utilizes differences in vapor pressure to permeate water through a macro-porous membrane and reject other non-volatile constituents present in the influent water. This review considers the fundamental heat and mass transfer processes in membrane distillation, recent advances in membrane technology, module configurations, and the applications and economics...
متن کاملCharacterization of a sulfonated pentablock copolymer for desalination applications
Water and salt transport properties were determined in a family of sulfonated pentablock copolymers to characterize their potential as chlorine-tolerant desalination membrane materials. The degree of sulfonation, block molecular weight, and casting conditions can be independently varied to tune the transport properties of these materials. Data for water uptake, water permeability, salt permeabi...
متن کاملExploiting Interfacial Water Properties for Desalination and Purification Applications
A molecular-scale interpretation of interfacial processes is often downplayed in the analysis of traditional water treatment methods. However, such an approach is critical for the development of enhanced performance in traditional desalination and water treatments. Water confined between surfaces, within channels, or in pores is ubiquitous in technology and nature. Its physical and chemical pro...
متن کاملA molecular dynamics simulation of water transport through C and SiC nanotubes: Application for desalination
In this work the conduction of ion-water solution through two discrete bundles of armchair carbon and silicon carbide nanotubes, as useful membranes for water desalination, is studied. In order that studies on different types of nanotubes be comparable, the chiral vectors of C and Si-C nanotubes are selected as (7,7) and (5,5), respectively, so that a similar volume of fluid is investigated ...
متن کاملQuantized Water Transport: Ideal Desalination through Graphyne-4 Membrane
Graphyne sheet exhibits promising potential for nanoscale desalination to achieve both high water permeability and salt rejection rate. Extensive molecular dynamics simulations on pore-size effects suggest that γ-graphyne-4, with 4 acetylene bonds between two adjacent phenyl rings, has the best performance with 100% salt rejection and an unprecedented water permeability, to our knowledge, of ~1...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Membrane Science
سال: 2021
ISSN: ['1873-3123', '0376-7388']
DOI: https://doi.org/10.1016/j.memsci.2021.119806