Preparation and characterization of quaternized poly(phthalazinone ether sulfone ketone) NF membranes

Su, Yi; Jian, Xigao; Zhang, Shouhai; Wang, Guoqing

doi:10.1016/j.memsci.2004.04.040

Cited by 47 publications

(14 citation statements)

References 21 publications

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“…Xu and Yang prepared a novel positively charged composite membrane with poly(2,6-dimethyl-1,4-phenylene oxide) as a support to separate divalent salt from monovalent salt [19]. The rejections for 1000 ppm MgCl 2 and NaCl were 32-73% and 6-36%, respectively, and the pure water flux changed from 32 to 38 kg/m 2 h. Su et al [20] prepared quaternized poly(phthalazinone ether sulfone ketone) NF membranes by a phase inversion method. The results show QAPPESK membrane with polyethyleneglycol 400 (PEG400) as additive has perfect properties for the removal of dyes and the separation between dyes and NaCl, and the highest permeation flux is about 193 kg/m 2 h at 0.…”

Section: Introductionmentioning

confidence: 99%

Studies on nanofiltration membrane formed by diisocyanate cross-linking of quaternized chitosan on poly(acrylonitrile) (PAN) support

Huang

Chen

Sun

et al. 2006

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

Studies on nanofiltration membrane formed by diisocyanate cross-linking of quaternized chitosan on poly(acrylonitrile) (PAN) support

Huang

Chen

Sun

et al. 2006

Journal of Membrane Science

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“…This process was convenient and environmentally friendly; the ultrafiltration membrane basement or toxic reagent was not necessary compared with previous report [11,12]. Firstly, we investigated the influence of casting solution on the performance of the PSDA membrane.…”

Section: Optimization Of Psda Membrane Preparationmentioning

confidence: 96%

“…The obtained NF membranes showed higher rejection of multivalent cations (Mg 2+ , Ca 2+ ) than monovalent cations (Na + ), which is a typical feature of a positively charged NF membrane. Quaternization is a widely applied route to prepare positively charged membranes; it involves chloromethylation and quaternization, and the production of the carcinogen reagent chloromethyl methyl ether is unavoidable in this route [12]. These methods are complex and uneconomic for large scale preparation.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of a positively charged nanofiltration membrane based on poly(arylene ether sulfone) with tertiary amine groups

Zhao

Luan

et al. 2015

J Polym Res

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A type of poly(arylene ether sulfone) with pendant tertiary amine groups (PSDA) was synthesized via nucleophilic substitution polymerization of 3,3′-dimethylaminemethylene-4,4′-oxybisphenol (DABP) and 4,4′-bisfluorodiphenyl sulfone(BFDPS). The resulting polymer was used to prepare a nanofiltration membrane via a convenient one-step phase inversion process. The preparation conditions were investigated; the optimum parameters were 30 wt% PSDA, 30 wt% THF, 40 wt% DMF casting solution, and 10 s evaporation time. The zeta potential test indicated that the PSDA membranes were positively charged below pH 11.0. The results of the membrane performance testing showed that the trend for rejection was R FeCl3 > R MgCl2 ≈ R CaCl2 > R NaCl > R Na2SO4 (R=rejection), which was a typical positively charged nanofiltration membrane performance. The PSDA membrane also showed excellent chlorine tolerance; no obvious performance change was observed after exposure to an aqueous NaOCl solution (active chlorine concentration no less than 1000 ppm) for 15 days.

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“…The development of highperformance AEMs depends on the type of membrane materials, ionomers and synthetic methods used, namely, (a) polymers blended with alkaline media; (b) pyridinium-based polymers; (c) radiation-grafted and quaternized polymers; and (d) chloromethylated, quaternized and alkalized polymers. Many types of AEMs based on quaternized polymers have been developed, such as polysiloxane containing a quaternary ammonium group (Kang et al, 2004), poly(oxyethylene methacrylates) containing an ammonium group (Yi et al, 1999), quaternized polyethersulfone cardo (Li and Wang, 2005), quaternized poly (phthalazinone ethersulfone ketone) (Su et al, 2004) and radiation-grafted poly(vinyldidene fluoride) and poly(tetrafluoroethenehexafluoropropylene) (Danks et al, 2003). As a frequently used polymer-based engineering material, Polysulfone (PS) possesses excellent high-temperature creep resistance, high chemical and oxidative resistance and excellent electrical and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Ecofriendly and Simplified Synthetic Route for Polysulfone-based Solid-State Alkaline Electrolyte Membrane

Pantamas¹,

Khonkeng²,

Krachodnok³

et al. 2012

American Journal of Applied Sciences

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Problem statement:Recently the alkaline system for fuel cell enhance their presence because of possibility of no-precious-metal catalyst and low over potential at cathode reaction. The anion exchange membrane for alkaline membrane fuel cell should be a key technology in order to achieve the practical performance as fuel cells. Alkaline anion exchange membranes of high ionic conductivities are made from polysulfone by adding a chloromethyl pendant group to the polysulfone, follow by reacting the chloromethyl group with amine to form quarternary ammonium pendant groups which act as the counter ion for hydroxide anion. Chloromethyl methyl ether, N,N-dimethylformamide and methanol are commonly used as agent for providing excellent conversions, but they are now considered to be carcinogenic. To avoid the use of such hazardous materials, in our work we used paraformaldehyde, chlorotrimethylsilane, N-methylpyrrolidone and ethanol as agent for providing conversion. Approach: Polysulfone (PS) was chloromethylated using chlorotrimethylsilane as a chloromethylation reagent, resulting in the formation of Chloromethylated Polysulfone (CMPS). CMPS was converted to a quaternized form using trimethylamine and precipitated into ethanol. The powder was dissolved in N-methylpyrrolidone, followed by aminated with a 25 wt% trimethylamine. Results: The resulting solution was cast onto a flat glass plate and dried in an oven. The membrane was immersed in KOH solution for 24 h to replace the Cl -anion in the polymer with OH -. Conclusion: The swelling behavior of polysulfone-based solid-state alkaline electrolyte membrane was closely related to the degree of water uptake (25 WU%, 7.5 SD%) and the ion-exchange capacity was 1.05 mmol g −1 , which is sufficient for electrolyte membranes used in alkaline fuel cells.

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Preparation and characterization of quaternized poly(phthalazinone ether sulfone ketone) NF membranes

Cited by 47 publications

References 21 publications

Studies on nanofiltration membrane formed by diisocyanate cross-linking of quaternized chitosan on poly(acrylonitrile) (PAN) support

Studies on nanofiltration membrane formed by diisocyanate cross-linking of quaternized chitosan on poly(acrylonitrile) (PAN) support

Preparation and characterization of a positively charged nanofiltration membrane based on poly(arylene ether sulfone) with tertiary amine groups

Ecofriendly and Simplified Synthetic Route for Polysulfone-based Solid-State Alkaline Electrolyte Membrane

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