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Preparation and characterization of a novel hydrophilic PVDF/PVA UF membrane modified by carboxylated multiwalled carbon nanotubes

19-Apr-2016 | Gui‐E Chen, Sun‐Jie Xu, Zhen‐Liang Xu, Wei‐Wei Zhu, Qiong Wu, Wei‐Guang Sun, Polymer Engineering and Science, 2016

Polyvinylidene fluoride (PVDF)/polyvinyl alcohol (PVA) ultrafiltration (UF) membranes were prepared via a phase inversion method employing the modification of carboxylated multiwalled carbon nanotubes (MWCNTs‐COOH). Various contents of MWCNTs‐COOHs (0.00–0.15 wt%, weight of casting solution) ...

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Bulk Crystallization of Proteins by Low‐pressure Water Evaporation

19-Apr-2016 | Michael Groß, Matthias Kind, Chemical Engineering & Technology, 2016

Abstract An advanced technique for bulk protein crystallization based on solvent evaporation is introduced. Hen egg white lysozyme is crystallized from its buffered aqueous solution in a 3L stirred tank at low pressure and, thus, moderate boiling temperatures. No crystallizing agent to reduce ...

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Mass and heat transfer behaviour of catalytic and electrochemical stirred tank reactors employing metallic screens lining as a reaction surface

19-Apr-2016 | Mahmoud M. Taha, Yasmine O. Fouad, Mohamed H. Abdel‐Aziz, Abdelaziz H. Konsowa, Gomaa H. Sedahmed, The Canadian Journal of Chemical Engineering, 2016

ABSTRACT Liquid‐solid mass transfer behaviour of a rectangular stirred tank reactor lined with single screens and stacks of closely packed screens was studied in relation to catalytic and electrochemical reactor design by the electrochemical technique. Variables studied were impeller rotation ...

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Increased production of nanofibrous materials by electroblowing from blends of hyaluronic acid and polyethylene oxide

15-Apr-2016 | Marek Pokorny, Vladimir Rassushin, Lucie Wolfova, Vladimir Velebny, Polymer Engineering and Science, 2016

Natural and synthetic nanostructured polymers in the form of fibers are used in medical and cosmetic applications. One of the main advantages of the electrospinning method is its flexibility, which allows to use airflow in the vicinity of a spinneret to increase production. The acceleration of ...

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Modification of sulfonated poly (ether ether ketone) membranes by impregnation with the ionic liquid 1‐butyl‐3‐methylimidazolium tetrafluoroborate for proton exchange membrane fuel cell applications

15-Apr-2016 | Letícia Guerreiro da Trindade, Márcia Regina Becker, Fabrício Celso, Cesar L. Petzhold, Emilse M.A. Martini, Roberto ..., Polymer Engineering and Science, 2016

Sulfonated poly (ether ether ketone) (SPEEK) membranes were modified by impregnation with the ionic liquid (IL) 1‐butyl‐3‐methylimidazolium tetrafluoroborate (BMI.BF4) by immersion into an IL aqueous solution for different periods of time. The modified membranes were investigated by ...

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Surfactant‐assisted separation of ginkgo flavonoids from Ginkgo biloba leaves using leaching and foam fractionation

04-Apr-2016 | Meng Jiao, Zhao Liang Wu, Yan Liu, Wei Liu, Rui Li, Asia-Pacific Journal of Chemical Engineering, 2016

Abstract A surfactant can be used as solubilizer in leaching or collector in foam fractionation. However, at the present, there are not any references on the two synergetic effects of it for improving the separation efficiency of foam fractionation. So in this work, a surfactant‐assisted foam ...

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Population balances in case of crossing characteristic curves: Application to T‐cells immune response

28-Mar-2016 | Qasim Ali, Ali Elkamel, Frédéric Gruy, Claude Lambert, Eric Touboul, The Canadian Journal of Chemical Engineering, 2016

Abstract The progression of a cell population where each individual is characterized by the value of an internal variable varying with time (e.g. size, mass, and protein concentration) is typically modelled by a population balance equation, a first‐order linear hyperbolic partial differential ...

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Preparation of supported photocatalytic membrane from mesoporous titania spheres for humic acid removal from wastewater

21-Mar-2016 | Sookwan Leong, Ze‐Xian Low, Qi Liu, Karen Hapgood, Xiwang Zhang, Huanting Wang, Asia-Pacific Journal of Chemical Engineering, 2016

Abstract Alumina‐supported titania photocatalytic membrane was prepared by coating of TiO2 spheres to remove humic acid from wastewater via photocatalytic oxidation degradation combined with physical filtration. TiO2 spheres with an average diameter of about 225 nm were synthesized by ...

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Gel spinning of UHMWPE fibers with polybutene as a new spin solvent

04-Mar-2016 | Xudong Fang, Tom Wyatt, Yifeng Hong, Donggang Yao, Polymer Engineering and Science, 2016

Gel spinning of UHMWPE fibers using low molecular weight polybutene (PB) as a new spin solvent was investigated. A 98/2 wt% PB/UHMWPE gel exhibits a melting temperature around 115°C and shows large‐scale phase separation upon cooling the solution to room temperature. The resulting precursor ...

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Fabrication of chitosan membrane with high flux by magnetic alignment of in situ generated Fe3O4

25-Feb-2016 | Ruisi Xing, Hong Wu, Cuihong Zhao, Hassan Gomaa, Jing Zhao, Fusheng Pan, Zhongyi Jiang, Chemical Engineering & Technology, 2016

Abstract Hybrid membranes with in‐situ generated Fe3O4 were fabricated by combining infiltration and magnetic alignment method. Typically, chitosan (CS) membrane containing iron ions was fabricated and then immersed in NaOH solution immediately. Fe3O4 was in‐situ generated when OH‐ infiltrated ...

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