Polymers, Год журнала: 2024, Номер 16(23), С. 3245 - 3245
Опубликована: Ноя. 22, 2024
Segmented polymers, such as polyether block amide (PEBA), exhibit unique properties due to the combination of different segments. PEBA consists soft polyester and rigid polyamide blocks, enabling its use in various industrial applications, including membrane technologies. In this study, membranes modified with a holmium-based metal-organic framework (Ho-1,3,5-H
Язык: Английский
Sustainability, Год журнала: 2025, Номер 17(9), С. 3801 - 3801
Опубликована: Апрель 23, 2025
The present study investigates the potential of novel mixed matrix membranes that are formed from biopolymer carboxymethyl cellulose (CMC) and metal–organic framework ZIF-8 to improve pervaporation dehydration isopropanol. effect content variation porous substrate selection (comprising acetate (CA) polyacrylonitrile) on dense supported membrane properties is systematically investigated using multiple analytical techniques. It found incorporation alters structure (confirmed by FTIR NMR), increases surface roughness (observed via SEM AFM), enhances swelling degree (obtained measurements), improves hydrophobicity (determined contact angle analysis), elevates thermal stability (verified TGA). Quantum chemical calculations used validate interactions between polymer matrix, modifier, feed components. transport developed evaluated through isopropanol pervaporation. cross-linked CMC with 10 wt% prepared CA has optimal performance: permeation flux 0.136–1.968 kg/(m2h) ˃92 water in permeate (water 12–100 wt%) at 22 °C.
Язык: Английский
Процитировано
0
Carbohydrate Polymers, Год журнала: 2025, Номер 363, С. 123713 - 123713
Опубликована: Май 8, 2025
Язык: Английский
Процитировано
0
Polymers, Год журнала: 2025, Номер 17(10), С. 1306 - 1306
Опубликована: Май 10, 2025
Industrial wastewater poses a significant environmental challenge due to its harmful effects. The development of sustainable membrane processes for water treatment and the environmentally friendly production polymer membranes is one major challenges our time. An alternative approach prepare polyelectrolyte complex (PEC) using aqueous phase separation (APS) method without use toxic solvents. In this work, PEC nanofiltration poly(sodium-p-styrenesulfonate) (PSS)/polyethylenimine (PEI) modified with carbon nanoparticles (graphene oxide, polyhydroxylated fullerene (HF), multi-walled nanotubes) were developed enhanced from anionic food dyes heavy metal ions. effect varying PSS/PEI monomer ratio, nanoparticles, content optimal HF modifier, cross-linking agent on properties was studied in detail. changes structure physicochemical PEC-based investigated spectroscopic, microscopic, thermogravimetric analysis methods, contact angle measurements. PSS PEI interactions during formation protonation computational methods. cross-linked PEC/HF(1%) (1:1.75 PSS/PEI) had more than 2 times higher permeability compared pristine membrane, dye ion rejection 99.99 >97%, respectively.
Язык: Английский
Процитировано
0
ChemistrySelect, Год журнала: 2024, Номер 9(28)
Опубликована: Июль 21, 2024
Abstract Preparing asymmetric pervaporation membranes is a kind of promising method to enhance membrane flux. Hydrophobic PVDF polymer can be used prepare membranes, but its separation factor relatively low. In this work, improve the performance pervaporation, PDMS was added membrane, and PDMS/PVDF permeable were prepared by non‐solvent induced phase (NIPS) method. The effects mass ratios on structures properties characterized SEM, XRD, FTIR, TGA, water contact angle mechanical strength. results showed that PDMS: affect phase‐separation behavior. As addition increased, finger‐like pores section gradually became longer, upper surface changed from less porous structure, lower structure interconnected flocculent porous, best blend achieved when ratio 1 : 5. Therefore, had in separating 15 wt. % ethanol aqueous solution with permeate total flux 273.65 g/(m 2 h) 9.09
Язык: Английский
Процитировано
1
ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(20), С. 12675 - 12690
Опубликована: Окт. 8, 2024
The zirconium-based metal–organic framework (Zr-MOF) class presents promising modifiers with excellent water stability and adsorption ability for the development of pervaporation mixed matrix membranes (MMMs). Thus, in this study, effect introduction Zr-MOF MIL-140A various ligands into sodium alginate (SA) was investigated order to develop enhanced characteristics dehydration. improved SA membrane were achieved by variation concentration (2–5 wt %), different its structure (MIL-140A-AcOH, MIL-140A-AcOH-EDTA), CaCl2 cross-linking. prepared Zr-MOF, composites, characterized using attenuated total reflectance-Fourier transform infrared spectroscopy, analysis low-temperature nitrogen adsorption, scanning electron microscopy, atomic force X-ray diffraction analysis, thermogravimetric contact angle liquid uptake measurements. transport properties tested dehydration isopropanol (IPA). results from quantum chemical computational experiments employed explain observed changes interactions. It shown that modification these Zr-MOFs led improvement performance, particular permeation flux, due their unique porous structure, functional groups, favorable interaction components feed. SA+MIL-140A(4%) cross-linked exhibited best (12–70 % water): highest flux 200–540 g m–2 h–1 maintaining 99.99 content permeate.
Язык: Английский
Процитировано
1
Journal of Materials Science, Год журнала: 2024, Номер 59(42), С. 20068 - 20091
Опубликована: Окт. 28, 2024
Язык: Английский
Процитировано
1
Polymers, Год журнала: 2024, Номер 16(23), С. 3245 - 3245
Опубликована: Ноя. 22, 2024
Segmented polymers, such as polyether block amide (PEBA), exhibit unique properties due to the combination of different segments. PEBA consists soft polyester and rigid polyamide blocks, enabling its use in various industrial applications, including membrane technologies. In this study, membranes modified with a holmium-based metal-organic framework (Ho-1,3,5-H
Язык: Английский
Процитировано
0