PVDF blended PVDF-g-PMAA pH-responsive membrane: Effect of additives and solvents on membrane properties and performance

Yang, Boxuan; Yang, Xin; Liu, Baicang; Chen, Zhiqiang; Chen, Chen; Liang, Songmiao; Chu, Liang‐Yin; Crittenden, John C.

doi:10.1016/j.memsci.2017.07.045

Cited by 45 publications

(17 citation statements)

References 36 publications

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“… 13 , 14 Several amphiphilic copolymers were synthesized using atom transfer radical polymerization (ATRP), and then blended with membrane materials. 12 , 15 − 17 Specifically, PVDF- graft -poly(ethylene glycol) methyl ether methacrylate (PVDF- g -PEGMA) is a derived amphiphilic copolymer synthesized using ATRP, which was blended with PVDF to enhance the hydrophilicity, flux, and antifouling performance of PVDF membranes. 18 , 19 …”

Section: Introductionmentioning

confidence: 99%

Superwettable PVDF/PVDF-g-PEGMA Ultrafiltration Membranes

Tiraferri

et al. 2020

ACS Omega

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Poly(vinylidene fluoride) (PVDF) is a common and inexpensive polymeric material used for membrane fabrication, but the inherent hydrophobicity of this polymer induces severe membranes fouling, which limits its applications and further developments. Herein, we prepared superwettable PVDF membranes by selecting suitable polymer concentration and blending with PVDF- graft -poly(ethylene glycol) methyl ether methacrylate (PVDF- g -PEGMA). This fascinating interfacial phenomenon causes the contact angle of water droplets to drop from the initial value of over 70° to virtually 0° in 0.5 s for the best fabricated membrane. The wetting properties of the membranes were studied by calculating the surface free energy by surface thermodynamic analysis, by evaluating the peak height ratio from Raman spectra, and other surface characterization methods. The superwettability phenomenon is the result of the synergetic effects of high surface free energy, the Wenzel model of wetting, and the crystalline phase of PVDF. Besides superwettability, the PVDF/PVDF- g -PEGMA membranes show great improvements in flux performance, sodium alginate (SA) rejection, and flux recovery upon fouling.

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Section: Introductionmentioning

confidence: 99%

Superwettable PVDF/PVDF-g-PEGMA Ultrafiltration Membranes

Tiraferri

et al. 2020

ACS Omega

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“…Based on these scientific results, in this work, blends of the polysulfone-type aromatic polyether [29] poly[2-(4-(diphenylsulfonyl)phenoxy)-6-(4-phenoxy)pyridine] (PDSPP) and its sulfonated derivative (SPDSPP) were synthesized, and porous membranes were formed after precipitation into a non-solvent (water) coagulation bath. Additionally, to better control the morphology of the membranes, water-soluble porogens; like PEG [30] and PVP [31], were incorporated. Blending, as well as the phase inversion mechanism, play a crucial role in the final structure [32].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Porous Polymeric Membranes Based on a Pyridine Containing Aromatic Polyether Sulfone

et al. 2019

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Polymeric membranes, based on a polysulfone-type aromatic polyether matrix, were successfully developed via the non-solvent induced phase separation (NIPS) method. The polyethersulfone type polymer poly[2-(4-(diphenylsulfonyl)-phenoxy)-6-(4-phenoxy) pyridine] (PDSPP) was used as the membrane matrix, and mixed with its sulfonated derivative (SPDSPP) and a polymeric porogen. The SPDPPP was added to impart hydrophilicity, while at the same time maintaining the interactions with the non-sulfonated aromatic polyether forming the membrane matrix. Different techniques were used for the membranes’ properties characterization. The results revealed that the use of the non-sulfonated and sulfonated polymers of the same polymeric backbone, at certain compositions, can lead to membranes with controllable porosity and hydrophilicity.

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“…The high oxygen content might improve hydrophilicity of the membrane surface. The introduction of the carboxylic groups to PPMs was also monitored by the ATR-FTIR spectra (Figure 4b) where the adsorption peak at 1699 cm −1 belonging to the carboxylic group 36 was showing in the spectra of PPMs rather than M0 and MC. Thus, the abundant carboxylic groups on the surface would be responses for the pH-responsive function of PPM.…”

Section: Resultsmentioning

confidence: 99%

High-Flux pH-Responsive Ultrafiltration Membrane for Efficient Nanoparticle Fractionation

Wang

Cheng

et al. 2021

ACS Appl. Mater. Interfaces

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Fractionation of nanoparticles with different sizes from the mixture by using a single membrane would reduce the membrane cost and enhance the efficiency. In this study, an amphiphilic pH-responsive copolymer was prepared by grafting a pHresponsive hydrophilic polymethacrylic acid (PMAA) side chain from a hydrophobic poly(vinylidene fluoride-co-chlorotrifluoroethylene), P(VDF-CTFE) backbone. Subsequently, the isoporous pH-responsive membranes (PPMs) were prepared from the functional copolymers with different PMAA chain lengths. PPM indicated reversible pore size decreasing with the increasing pH of the feed. Moreover, the membrane pore size variation range was further extended by adjusting the PMAA side chain length of the copolymer to reach a wide range from 10.2 to 34.5 nm. Owning to the amphiphilic nature of the copolymer, PPM showed a narrow pore size distribution which is responsible for the much higher pure water flux of PPM than the conventional UF membrane with similar retention capability. In the fractionation test, the mixed 20 and 30 nm polystyrene nanoparticles were penetrating PPM at pH 11 and 3, respectively. The pH-responsive PPM indicated great potential for nanoparticle fractionation, while the uniform pores of PPM further enhanced the membrane performance in terms of permeability and selectivity.

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PVDF blended PVDF-g-PMAA pH-responsive membrane: Effect of additives and solvents on membrane properties and performance

Cited by 45 publications

References 36 publications

Superwettable PVDF/PVDF-g-PEGMA Ultrafiltration Membranes

Superwettable PVDF/PVDF-g-PEGMA Ultrafiltration Membranes

Preparation of Porous Polymeric Membranes Based on a Pyridine Containing Aromatic Polyether Sulfone

High-Flux pH-Responsive Ultrafiltration Membrane for Efficient Nanoparticle Fractionation

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