Preparation and characterization of a pH-responsive membrane carrier for meso-tetraphenylsulfonato porphyrin

Wang, Mingxia; Yan, Feng; Zhao, Lizhi; Zhang, Yuzhong; Sorci, Mirco

doi:10.1039/c6ra26414j

Cited by 18 publications

(15 citation statements)

References 45 publications

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“…From Table 3, the content of N element both on the outside membrane surface or inside the membrane increases significantly from 0.96% and 0.89% (in the B2 base membrane) to 1.71% and 1.48% (in the B2 32:1 membrane), which is attributed to the formation of the porphyrin rings containing N element. In UV spectra ( Figure 3B), there is no absorption peak seen in the B2 base membrane, but the B2 32:1 membrane shows obvious characteristic absorption peaks of porphyrin, including S band (419 nm) and Q band (514 nm, 549 nm, 590 nm, 646 nm) [38]. These characterizations confirm the existence of…”

Section: Determination Of the Existence And Protonation Of Tcpp In Thsupporting

confidence: 53%

Improved Performance of Polysulfone Ultrafiltration Membrane Using TCPP by Post-Modification Method

Jia

Sun

et al. 2020

Membranes

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Ultrafiltration (UF) membranes have found great application in sewage purification and desalination due to their high permeation flux and high rejection rate for contaminants under low-pressure conditions, but the flux and antifouling ability of UF membranes needs to be improved. Tetrakis (4-carboxyphenyl) porphyrin (TCPP) has good hydrophilicity, and it is protonated under strongly acidic conditions and then forms strong hydrogen bonds with N, O and S, so that the TCPP would be well anchored in the membrane. In this work, NaHCO 3 was used to dissolve TCPP and TMC (trimesoyl chloride) was used to produce a strong acid. Then, TCPP was modified in a membrane with a different rejection rate by a method similar to interfacial polymerization. Performance tests of TCPP/polysulfone (PSf) membranes show that for the membrane with a high BSA (bovine serum albumin) rejection, when the ratio of NaHCO 3 to TCPP is 16:1 (wt.%), the pure water flux of membrane Z1 16:1 is increased by 34% (from 455 to 614 Lm −2 h −1 bar −1 ) while the membrane retention was maintained above 95%. As for the membrane with a low BSA rejection, when the ratio of NaHCO 3 to TCPP was 32:1, the rejection of membrane B2 32:1 was found to increase from 81% to 96%. Although the flux of membrane B2 32:1 decreased, it remained at 638 Lm −2 h −1 bar −1 , which is comparable to the reported polymer ultrafiltration membrane. The above dual results are thought to be attributed to the synergistic effect of protonated TCPP and NaHCO 3 , where the former increases membrane flux and the latter increases the membrane rejection rate. This work provides a way for the application of porphyrin and porphyrin framework materials in membrane separation.

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Section: Determination Of the Existence And Protonation Of Tcpp In Thsupporting

confidence: 53%

Improved Performance of Polysulfone Ultrafiltration Membrane Using TCPP by Post-Modification Method

Jia

Sun

et al. 2020

Membranes

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“…23 Chu et al prepared pH-responsive membranes by graing diblock polymers of poly(N-isopropylacrylamide)-bpoly(methacrylic acid) (PNIPAM-b-PMAA) onto nylon-6 membrane substance pore surfaces using atom transfer radical polymerization. 24 In our earlier studies, we developed pH-responsive membranes by graing poly(4-vinylpyridine) (P4VP) chains from the surface of commercial PSF membranes 28 and graing poly(2-(dimethylamino)ethylmethylacrylate) (PDMAEMA) chains from the surface of ethylene vinyl alcohol (EVAL) membranes. 29 The pH-responsive functions are achieved through the shrinking/swelling conformational transitions of the pH-responsive polymer chains.…”

Section: -3mentioning

confidence: 99%

pH-Responsive nanofiltration membranes based on porphyrin supramolecular self-assembly by layer-by-layer technique

Zhao

Zhang

2017

RSC Adv.

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A novel pH-responsive nanofiltration membrane was fabricated by means of layer-by-layer (LbL) technique based on porphyrin supramolecular self-assembly. The multilayer membrane was prepared on a hydrolyzed poly(acrylonitrile) (PAN) support membrane, and was composed of poly(allylamine hydrochloride) (PAH) as a polycation and poly(styrene sulfonate) (PSS) as a polyanion and 5,10,15,20-tetrakis-(4-sulfonatophenyl)-porphyrin (TPPS) as the pH-responsive functional supramolecular. Aggregation of TPPS and the shielding effect of salt in solution affected the adsorption of TPPS onto the membrane, while the higher ionization degree of the oppositely charged membrane with PAH favored the adsorption of TPPS. A coil structure of polyelectrolytes caused by the lower ionization degree of PAH or by the shielding effect of salt led to higher adsorption of polyelectrolytes on the membrane. The LbL assembly membrane showed higher and pH-responsive water flux and salt rejection compared with that without TPPS. At pH 1.0, TPPS assembled into J-aggregates on the membrane surface, and the membrane showed relatively lower water flux and higher rejection. When the pH value was increased above 2.0, TPPS transformed into H-aggregates and monomers, and the membrane showed relatively higher water flux and lower salt rejection.

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“…P4VP is a pH-responsive polybase with a p K a value of ~4.5 (Wang et al, 2017), which is lower than those of PDEA and PDMA. Relationship between degree of protonation of the pyridine group (α) and pH can be expressed using Equation (1)…”

Section: Resultsmentioning

confidence: 99%

“…At pH around 5 or above, P4VP has either very low or zero charge density, which results in precipitation. P4VP-based polymers have been used for syntheses of polymeric micelles (Koh et al, 2007), microgels (Ma and Fukutomi, 1991; Kim and Vincent, 2005), nanocomposite particles (Fujii et al, 2005, 2006a), surface-modifier for immobilization of nanoparticles (Malynych et al, 2002) and polymer brushes (Wang et al, 2017). Here, P4VP homopolymer was used as a colloidal stabilizer to synthesize PS latex particles.…”

Section: Resultsmentioning

confidence: 99%

“…P4VP shows a p K a value of ~4.5 (Wang et al, 2017), which is lower than those of PDEA and PDMA, and it is expected that stability of aqueous bubbles stabilized with the P4VP-PS particles should be changed at around pH 4.5. The P4VP-PS particles were characterized in terms of morphology, size, size distribution, chemical composition, surface chemistry, and pH-response.…”

Section: Introductionmentioning

confidence: 99%

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pH-Responsive Aqueous Bubbles Stabilized With Polymer Particles Carrying Poly(4-vinylpyridine) Colloidal Stabilizer

et al. 2018

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Free radical dispersion polymerization was conducted to synthesize near-monodispersed, micrometer-sized polystyrene (PS) particles carrying pH-responsive poly(4-vinylpyridine) (P4VP) colloidal stabilizer (P4VP-PS particles). The P4VP-PS particles were extensively characterized in terms of morphology, size, size distribution, chemical composition, surface chemistry, and pH-response using optical and scanning electron microscopies, elemental microanalysis, X-ray photoelectron spectroscopy, laser diffraction particle size analysis, and zeta potential measurement. The P4VP-PS particles can work as a pH-responsive stabilizer of aqueous bubbles by adsorption at the air-water interface. At and above pH 4.0, where the particles have partially protonated/non-protonated P4VP stabilizer with relatively hydrophobic character, particle-stabilized bubbles were formed. Optical and scanning electron microscopy studies confirmed that the P4VP-PS particles were adsorbed at the air-water interface of the bubbles in aqueous media. At and below pH 3.0, where the particles have cationic P4VP stabilizer with water-soluble character, no bubble was formed. Rapid disruption of the bubbles can be induced by decreasing the pH; the addition of acid caused the in situ protonation of pyridine groups in P4VP, which impart water-soluble character to the P4VP stabilizer, and the P4VP-PS particles were desorbed from the air-water interface. The bubble stabilization/destabilization cycles could be repeated at least five times.

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Preparation and characterization of a pH-responsive membrane carrier for meso-tetraphenylsulfonato porphyrin

Abstract: The pH-responsive PSF-g-P4VP-blended PSF membrane smartly rejects meso-tetraphenylsulfonato porphyrin (TPPS) and induces TPPS to form J-type aggregates.

Cited by 18 publications

References 45 publications

Improved Performance of Polysulfone Ultrafiltration Membrane Using TCPP by Post-Modification Method

Improved Performance of Polysulfone Ultrafiltration Membrane Using TCPP by Post-Modification Method

pH-Responsive nanofiltration membranes based on porphyrin supramolecular self-assembly by layer-by-layer technique

pH-Responsive Aqueous Bubbles Stabilized With Polymer Particles Carrying Poly(4-vinylpyridine) Colloidal Stabilizer

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