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Preparation of dual‐layer acetylated methyl cellulose hollow fiber membranes via co‐extrusion using thermally induced phase separation and non‐solvent induced phase separation methods

25-Jul-2015 | Hanna Jang, Du‐Hyun Song, Hye‐Jin Lee, Seong‐Han Lim, In‐Chul Kim, Young‐Nam Kwon, Journal of Applied Polymer Science, 2015

ABSTRACT Dual‐layer acetylated methyl cellulose (AMC) hollow fiber membranes were prepared by coupling the thermally induced phase separation (TIPS) and non‐solvent induced phase separation (NIPS) methods through a co‐extrusion process. The TIPS layer was optimized by investigating the effects ...


Thermoplastic softening behavior of organically modified polyoxotitanates: Effects of the amount of water and benzoylacetone for hydrolyzing alkoxides

23-Jul-2015 | Shinya Oda, Hiromitsu Kozuka, Hiroaki Uchiyama, Journal of Applied Polymer Science, 2015

ABSTRACT Organically modified polyoxotitanates were prepared by hydrolyzing titanium tetra‐n‐butoxide in the presence of benzoylacetone (BzAc) in solution at Ti(OC4H9)4 : BzAc : H2O : CH3COCH3 mole ratios of 1 : (1 or 2) : (1 or 10) : 20. The solutions were concentrated at 80°C and dried at ...


Fabrication of a novel cellulose acetate imprinted membrane assisted with chitosan‐wrapped multi‐walled carbon nanotubes for selective separation of salicylic acid from industrial wastewater

23-Jul-2015 | Minjia Meng, Zhihui He, Li Yan, Yongsheng Yan, Fengquan Sun, Yan Liu, Shijuan Liu, Journal of Applied Polymer Science, 2015

ABSTRACT Highly selective cellulose acetate (CA) blend imprinted membranes for salicylic acid (SA) removal were synthesized by phase inversion technique with chitosan as a functional polymer and chitosan‐wrapped multi‐walled carbon nanotubes (CHI‐wrapped MWCNTs) as the additives. The surface ...


Electrochemical behavior of multifunctional graphene–polyimide nanocomposite film in two different electrolyte solutions

21-Jul-2015 | Patricia Azuka Okafor, Brenton Huxel, Jude O. Iroh, Journal of Applied Polymer Science, 2015

ABSTRACT The effect of solvent on specific capacitance, bulk resistance, and charge/discharge capacity of graphene/polyimide composite films is studied by electrochemical methods. Composite films are synthesized by in situ condensation polymerization of poly (amic acid) in the presence of 50 ...


Effect of graphene oxide on the behavior of poly(amide‐6‐b‐ethylene oxide)/graphene oxide mixed‐matrix membranes in the permeation process

21-Jul-2015 | Dan Zhao, Jizhong Ren, Yongtao Qiu, Hui Li, Kaisheng Hua, Xinxue Li, Maicun Deng, Journal of Applied Polymer Science, 2015

ABSTRACT Polyether‐block‐amide (Pebax)/graphene oxide (GO) mixed‐matrix membranes (MMMs) were prepared with a solution casting method, and their gas‐separation performance and mechanical properties were investigated. Compared with the pristine Pebax membrane, the crystallinity of the Pebax/GO ...


Fabrication of polyvinyl chloride based nanocomposite nanofiltration membrane: investigation of SDS/Al2O3 nanoparticle concentration and solvent ratio effects

21-Jul-2015 | E. Bagheripour, A. R. Moghadassi, S. M. Hosseini, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract In the current research polyvinylchloride‐based nanocomposite nanofiltration membranes were prepared by using of sodium dodecyl sulfate (SDS) as additive, aluminum oxide (Al2O3) nanoparticles as inorganic filler and dimethylacetamide (DMAC)/tetrahydrofuran (THF) as solvents via phase ...


Synthesis and photophysical properties of 1,2‐diphenylindolizine derivatives: fluorescent blue‐emitting materials for organic light‐emitting device

20-Jul-2015 | Yeong Ran Song, Choon Woo Lim, Tae Woo Kim, Luminescence, 2015

Abstract New blue‐emitting materials based on 1,2‐diphenylindolizine were designed and synthesized through a microwave‐assisted Suzuki coupling reaction. The photophysical, electrochemical, and thermal properties of the 1,2‐diphenylindolizine derivatives were investigated using UV–visible and ...


Dynamic NMR study of dinitrophenyl derivatives of seven‐membered cyclic ketals of pyridoxine

20-Jul-2015 | Ilfat Z. Rakhmatullin, Leisan F. Galiullina, Marsel' R. Garipov, Alexey D. Strel'nik, Yurii G. Shtyrlin, Vladimir V. ..., Magnetic Resonance in Chemistry, 2015

Two pyridoxine derivatives containing a dinitrophenyl moiety were investigated by 1H NMR spectroscopy. Conformational dynamics in solution were studied for each compound using dynamic NMR experiments. It was shown that both compounds studied are involved into two conformational exchange ...


Dual‐emissive polydiphenylsilane nanocomposite: effect of N,N′‐bis(4‐hydroxysalicylidene)‐1,2‐phenylenediamine‐Zn complex

20-Jul-2015 | Liviu Sacarescu, Corneliu Cojocaru, Rodinel Ardeleanu, Maria Fortuna, Gabriela Sacarescu, Mihaela Simionescu, Polymers for Advanced Technologies, 2015

The fluorescence properties of polysilane can be strongly influenced by creating new excited states that involve electronic transitions and the relaxation to the ground state. This work presents the optical effects obtained by doping a specially designed polydiphenylsilane copolymer with Zn ...


Surface micromorphology of dental composites [CE‐TZP]‐[Al2O3] with Ca+2 modifier

17-Jul-2015 | Sofia Berezina, Alla Alexandrovna Il'icheva, Lyudmila Ivanovna Podzorova, Ştefan Ţălu, Microscopy Research and Technique, 2015

ABSTRACT The objective of this study was to characterize the three‐dimensional (3D) surface micromorphology of the ceramics produced from nanoparticles of alumina and tetragonal zirconia (t‐ZrO2) with addition of Ca+2 for sintering improvement. The 3D surface roughness of samples was studied ...


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