Preparation of poly(glycidylmethacrylate-divinylbenzene) weak acid cation exchange stationary phases with succinic anhydride, phthalic anhydride, and maleic anhydride for ion chromatography

Different polyesteramides hyperbranched polymers (HPEA1-6)/montomorillonite clay (MMT) nanocomposites were prepared with three different loading contents of clay (4, 10, and 15 wt%). The obtained nanocomposites were characterized via XRD, thermal analyses, and TEM. Generally, intercalation behavior was observed. The hyperbranched polyesteramides (HPEA1-6) were originally prepared by the bulky reaction between maleic anhydride (MAn), succinic anhydride (ScAn), and phthalic anhydride (PhAn) with either diethanolamine (DEA) or diisopropanolamine (DiPA). The resulting hyperbranched polyesteramides (HPEA1-6) were characterized by GPC, IR,1H-NMR, TGA, and DSC.

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Improving the efficiency of CO2 electrolysis by using a bipolar membrane with a weak-acid cation exchange layer

Nature Chemistry ◽

10.1038/s41557-020-00602-0 ◽

2020 ◽

Vol 13 (1) ◽

pp. 33-40

Author(s):

Zhifei Yan ◽

Jeremy L. Hitt ◽

Zichen Zeng ◽

Michael A. Hickner ◽

Thomas E. Mallouk

Keyword(s):

Cation Exchange ◽

Weak Acid ◽

Bipolar Membrane ◽

Exchange Layer ◽

Acid Cation ◽

Co2 Electrolysis

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Preparation of Cation Exchange Fiber by Preradiation-Induced Grafting of Acrylic Acid without Removal of the Inhibitor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.150-151.1764 ◽

2010 ◽

Vol 150-151 ◽

pp. 1764-1767 ◽

Cited By ~ 1

Author(s):

Jun Fu Wei ◽

Kong Yin Zhao ◽

Huan Zhang ◽

Xiao Lei Wang ◽

Li Chen

Keyword(s):

Acrylic Acid ◽

Cation Exchange ◽

Storage Time ◽

Monomer Concentration ◽

Weak Acid ◽

Polymerization Inhibitor ◽

Acid Cation ◽

Radiation Induced ◽

Γ Ray ◽

Radiation Induced Grafting

A weak acid cation exchange fiber was prepared by γ-ray pre-radiation induced grafting of acrylic acid (AA) onto polypropylene (PP) non-woven without removal of the polymerization inhibitor in acrylic acid. The factors influenced the grafting degree were discussed, such as radiation dose, initiator concentration, monomer concentration, storage time and bath ratio. It is found that the initiator 2, 2'-Azobisisobutyronitrile (AIBN) was necessary for the increased grafting of AA without removing the inhibitor in AA.

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PHYSICOCHEMICAL BASES OF THE REMOVAL PROCESS OF BIOCIDAL REAGENT ON BASIS OF POLYHEXAMETHYLENEGUANIDINE FROM THE WATER WITH THE USE OF WEAK ACID CATION EXCHANGE RESIN

WATER AND WATER PURIFICATION TECHNOLOGIES SCIENTIFIC AND TECHNICAL NEWS ◽

10.20535/2218-9300112010139400 ◽

2010 ◽

Vol 1 (1) ◽

pp. 4-11

Author(s):

М. О. Сусь ◽

Т. Є. Мітченко ◽

Н. В. Макарова

Keyword(s):

Cation Exchange ◽

Exchange Resin ◽

Cation Exchange Resin ◽

Weak Acid ◽

Removal Process ◽

Acid Cation

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Ion Exchange Functional Nanofibers

MRS Proceedings ◽

10.1557/proc-1240-ww10-03 ◽

2009 ◽

Vol 1240 ◽

Author(s):

Prabir K Patra ◽

Sukalyan Sengupta

Keyword(s):

Ion Exchange ◽

Cation Exchange ◽

Average Diameter ◽

Strong Acid ◽

Weak Acid ◽

Exchange Capacity ◽

Orifice Diameter ◽

Pump Speed ◽

Acid Cation ◽

Weak Base Anion Exchange

AbstractWe have synthesized a series of ion exchange functionalized fibers (IXF) from polystyrene (PS) and polyacrylonitrile (PAN). To obtain strong-acid cation exchange fibers, polystyrene was sulfonated using specific sulfonation protocols. Micron sized fibers (average diameter of 100m) were then produced from the functionalized polystyrene using a single-screw extruder equipped with a 30 hole spinneret with orifice diameter of 0.5 mm with a precise screw speed of 5 rpm, pump speed of 15 rpm, and with a feed rate of 2.4 cc/min. The extruder zone temperature was kept at 250 – 270 °C. Fiber was drawn at 120 degree with a draw ratio of 2. Electrospinning of functionalized polystyrene was also carried out to produce ultrafine functionalized fibers of 100 nm in average diameter. We have also electrospun polystyrene and polyisoprene blended nanofibers to increase the strength of the resulting blend nanofibers compared to pure PS nanofibers. To synthesize weak-acid cation exchange fibers polyacrylonitrile (PAN) was electrospun and the nanofibers obtained were alkaline hydrolyzed with 2 N NaOH for 20 minutes at room temperature to convert nitrile bonds to carboxylate. Cation exchange capacity (CEC) of the microfibers and nanofibers was determined. Sulfonated PS microfibers show high CEC of 4.0 meq/gm compared to that of nanofibers with 2.5 meq/gm. CEC of blended nanofibers of PS and polyisoprene was 2.0 meq/gm. In case of PAN fibers, nanosized electrospun fibers were found to show a CEC of 1.5 meq/gm. Weak-base anion exchange fiber synthesis was undertaken using appropriate protocol and its CEC was measured. For all IXF synthesized, fiber diameter was measured using SEM, degree of functionalization was qualitatively determined using FTIR and ion exchange capacity was computed after mass balance on a binary exchange system after equilibrium.

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