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Qing Lin Liu - One of the best experts on this subject based on the ideXlab platform.

Guang Lu Han - One of the best experts on this subject based on the ideXlab platform.

  • Post-synthetic MIL-53(Al)-SO3H incorporated sulfonated Polyarylethersulfone with cardo (SPES-C) membranes for separating methanol and methyl tert-butyl ether mixture
    Separation and Purification Technology, 2019
    Co-Authors: Guang Lu Han, Zhe Chen, Li Fang Cai, Yong Hui Zhang, Jun Feng Tian, Huan Huan, Shao Ming Fang
    Abstract:

    Abstract The post-synthetic MIL-53(Al)-SO3H was prepared and incorporated into sulfonated Polyarylethersulfone with cardo (SPES-C) polymer matrix to form mixed matrix membranes (MMMs). The as-prepared MIL-53(Al)-SO3H was characterized by wide angle X-ray diffraction (WAXRD), fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), intelligent gravimetric analysis (IGA), scanning electron microscope (SEM) and elemental analysis. Positron annihilation lifetime spectroscopy (PALS), thermo gravimetric analysis (TGA), SEM, FTIR and water contact angle measurements were performed to investigate the properties and structure of MMMs. The results showed that MIL-53(Al)-SO3H was successfully synthesized without crystal structure collapse. The particle sizes were in nanometer scale. MIL-53(Al)-SO3H preferentially adsorbed methanol (MeOH) over methyl tert-butyl ether (MTBE). MIL-53(Al)-SO3H dispersed in SPES-C phase uniformly and no obvious interfacial defects could be observed. The membrane hydrophilicity, swelling behavior as well as free volume parameters could be effectively tuned by changing filler loading. The as-prepared MMMs demonstrated excellent separation performance and encouraging long-term stability for MeOH (15 wt%)/MTBE mixture. With increasing the filler loading, the permeation flux increased and the separation factor showed an up and down trend. When MIL-53(Al)-SO3H loading was below 15 wt%, an antitrade-off phenomenon was obtained. M-15 with 15 wt% loading exhibited the optimal separation performance (permeation flux of 0.368 kg·m−2·h−1 and separation factor of 1990).

  • [Cu2(bdc)2(bpy)]n/SPES-C mixed matrix membranes for separation of methanol/methyl tert-butyl ether mixtures
    ELSEVIER SCIENCE BV, 2014
    Co-Authors: Guang Lu Han, Zhang, Qiu Gen, Zhu, Ai Mei, Ke Zhou, Lai, Ao Nan, Liu, Qing Lin
    Abstract:

    As a new type of filler for mixed matrix membranes (MMMs), metal-organic frameworks (MOFs) have received increasing attention. As a kind of MOFs, [Cu2(bdc)2(bpy)]n is successfully synthesized in this work and characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS), wide angle X-ray diffraction (WAXRD), thermogravimetric analysis (TGA) and adsorption isotherms. [Cu2(bdc)2(bpy)]n is found to preferentially adsorb methanol (MeOH) over methyl tert-butyl ether (MTBE). For this reason, the [Cu2(bdc)2(bpy)]n is incorporated into sulfonated Polyarylethersulfone with cardo (SPES-C) to form [Cu2(bdc)2(bpy)]n/SPES-C MMMs for the separation of MeOH/MTBE mixtures. Both the sorption selectivity and the diffusion selectivity are found to increase with the addition of [Cu2(bdc)2(bpy)]n leading to an increase in the separation factor. With increasing [Cu2(bdc)2(bpy)]n loading from 5 to 20wt%, the flux increased up to 0.288kgm-2h-1 at 20wt% loading. A threshold of [Cu2(bdc)2(bpy)]n loading is approximately 20wt% where the flux remains almost constant regardless of further increasing the [Cu2(bdc)2(bpy)]n content. This work demonstrates an improved performance of the [Cu2(bdc)2(bpy)]n/SPES-C MMMs for the separation of MeOH/MTBE mixtures. ? 2013 Elsevier B.V

  • [Cu-2(bdc)(2)(bpy)](n)/SPES-C mixed matrix membranes for separation of methanol/methyl tert-butyl ether mixtures
    ELSEVIER SCIENCE BV, 2014
    Co-Authors: Guang Lu Han, Zhang, Qiu Gen, Zhu, Ai Mei, Ke Zhou, Lai, Ao Nan, Liu, Qing Lin
    Abstract:

    National Nature Science Foundation of China [21376194, 21076170]; Nature Science Foundation of Fujian Province of China [201010013]; Priority Areas of Development in Doctoral Program of Higher Education [20130121130006]As a new type of filler for mixed matrix membranes (MMMs), metal-organic frameworks (MOB) have received increasing attention. As a kind of MOFs, [CU2(bdc)(2)(bpy)](n), is successfully synthesized in this work and characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS), wide angle X-ray diffraction (WAXRD), thermogravimetric analysis (TGA) and adsorption isotherms. [CU2(bdc)(2)(bpy)](n), is found to preferentially adsorb methanol (MeOH) over methyl ter-butyl ether (MTBE). For this reason, the [Cu-2(bdc)(2)(bpy)](n) is incorporated into sulfonatecl Polyarylethersulfone with cardo (SPES-C) to form [CU2(bdc)(2)(bpy)](n)/SPES-C MMMs for the separation of MeOH/MTBE mixtures. Both the sorption selectivity and the diffusion selectivity are found to increase with the addition of [CU2(bdc)(2)(bpy)](n) leading to an increase in the separation factor. With increasing [CU2(bdc)(2)(bpy)](n) loading from 5 to 20 wt%, the flux increased up to 0288 kg m 2 h at 20 wt% loading. A threshold of [CU2(bdc)(2)(bpy)](n) loading is approximately 20 wt% where the flux remains almost constant regardless of further increasing the [CU2(bdc)(2)(bpy)](n), content. This work demonstrates an improved performance of the [CU2(bdc)(2)(bpy)](n)/SPES-C MMMs for the separation of MeOH/MTBE mixtures. (c) 2013 Elsevier B.V. All rights reserve

  • Polyarylethersulfone with cardo poly vinyl pyrrolidone blend membrane for pervaporation of methanol methyl tert butyl ether mixtures
    Journal of Membrane Science, 2013
    Co-Authors: Guang Lu Han, Qiu Gen Zhang, Yi Gong, Qing Lin Liu
    Abstract:

    National Nature Science Foundation of China [20976145, 21076170]; Nature Science Foundation of Fujian Province of China [2009J01040, 201010013]; Doctoral Program of Higher Education [20090121110031]

  • pervaporation separation of methanol methyl tert butyl ether mixtures using Polyarylethersulfone with cardo membranes
    Separation and Purification Technology, 2013
    Co-Authors: Guang Lu Han, Qiu Gen Zhang, Ai Mei Zhu, Qing Lin Liu
    Abstract:

    National Nature Science Foundation of China [20976145, 21076170]; Nature Science Foundation of Fujian Province of China [2009J01040, 2010I0013]; research fund for the Doctoral Program of Higher Education [20090121110031]

Hui-kim Yap - One of the best experts on this subject based on the ideXlab platform.

  • Use of HF20 membrane in critically ill unstable low-body-weight infants on inotropic support
    Pediatric Nephrology, 2013
    Co-Authors: Isaac Desheng Liu, Perry Yew-weng Lau, Wee-song Yeo, Pei-lin Koh, Hui-kim Yap
    Abstract:

    Background Initiating continuous renal replacement therapy (CRRT) in infants exposes them to the dual hemodynamic challenges of high circuit extracorporeal volumes and potential membrane reactions, in the case of acrylonitrile AN69 membranes. The use of the new Prismaflex HF20 membrane in hemodynamically unstable low-body-weight infants on inotropic support has not been reported. Treatment We describe the use of the HF20 (Gambro Lundia AB, Lund, Sweden) membrane in four low-body-weight infants (2.3 to 5.4 kg) with multi-organ dysfunction syndrome who were critically ill in the Pediatric Intensive Care Unit (PICU), hemodynamically unstable, and on inotropes. We were able to achieve target volume loss in all infants without compromising their hemodynamic status. Mean arterial pressures were maintained between 39 and 57 mmHg. The relatively low circuit volume of the HF20 set (60 ml) obviated the need for blood prime in the majority; however, when blood prime was required, there was no adverse reaction with the Polyarylethersulfone (PAES) membrane. Solute clearance in these small infants was efficient with correction of metabolic acidosis and electrolyte abnormalities. Excellent circuit lifespan (56.3 ± 32.3 h) was observed. Conclusions CRRT using the HF20 membrane is safe and hemodynamically well tolerated in high-risk, unstable low-body-weight infants with cardiac dysfunction on multiple inotropes.

  • Use of HF20 membrane in critically ill unstable low-body-weight infants on inotropic support
    Pediatric nephrology (Berlin Germany), 2013
    Co-Authors: Isaac Desheng Liu, Perry Yew-weng Lau, Wee-song Yeo, Pei-lin Koh, Hui-kim Yap
    Abstract:

    Initiating continuous renal replacement therapy (CRRT) in infants exposes them to the dual hemodynamic challenges of high circuit extracorporeal volumes and potential membrane reactions, in the case of acrylonitrile AN69 membranes. The use of the new Prismaflex HF20 membrane in hemodynamically unstable low-body-weight infants on inotropic support has not been reported. We describe the use of the HF20 (Gambro Lundia AB, Lund, Sweden) membrane in four low-body-weight infants (2.3 to 5.4 kg) with multi-organ dysfunction syndrome who were critically ill in the Pediatric Intensive Care Unit (PICU), hemodynamically unstable, and on inotropes. We were able to achieve target volume loss in all infants without compromising their hemodynamic status. Mean arterial pressures were maintained between 39 and 57 mmHg. The relatively low circuit volume of the HF20 set (60 ml) obviated the need for blood prime in the majority; however, when blood prime was required, there was no adverse reaction with the Polyarylethersulfone (PAES) membrane. Solute clearance in these small infants was efficient with correction of metabolic acidosis and electrolyte abnormalities. Excellent circuit lifespan (56.3 ± 32.3 h) was observed. CRRT using the HF20 membrane is safe and hemodynamically well tolerated in high-risk, unstable low-body-weight infants with cardiac dysfunction on multiple inotropes.

Qiu Gen Zhang - One of the best experts on this subject based on the ideXlab platform.

Tianlu Chen - One of the best experts on this subject based on the ideXlab platform.

  • Gas transport properties of a series of cardo polyarylethers
    Journal of Applied Polymer Science, 2001
    Co-Authors: Zhonggang Wang, Tianlu Chen
    Abstract:

    Gas transport of H-2, CO2, O-2, N-2, and CH4 in a series of cardo polyarylethers were examined over a temperature range of 30 similar to 100 degreesC. These polymers include three poly(aryletherketone)s, two poly(arylethersulfone)s, and one poly(aryletherketoneketone). It was found that the large length/diameter ratio of the polymer repeat unit for cardo polyaryletherketoneketone (PEKK-C) and strong intermolecular interaction in hydrogen-bonded Polyarylethersulfone (PES-H) and hydrogen-bonded polyaryletherketone (PEK-H) resulted in a considerable increase in gas permselectivity. Alkyl-substituted polyaryletherketone (PEK-A), bearing a pendant bulky propyl group on the cardo ring, simultaneously exhibited 62.5% higher H-2 permeability and 59.8% higher H-2/N-2 permselectivity than unmodified poly(aryletherketone) (PEK-C). The causes of the trend were interpreted in terms of chain packing density, segmental motion ability, steric factor, and intermolecular interaction of polymers, together with gas kinetic diameter and critical temperature data.

  • Synthesis and properties of novel random and block copolymers composed of phthalimidine‐ and perfluoroisopropylidene‐polyarylether‐sulfones
    Polymer International, 2001
    Co-Authors: Zhonggang Wang, Tianlu Chen
    Abstract:

    A series of novel Polyarylethersulfone (AB)(n) block copolymers with different segment lengths have been synthesized by nucleophilic solution polycondensation of phenoxide-terminated and fluorine-terminated oligomers; random copolymers have been prepared over the whole composition ranges. The structures of the resultant copolymers have been confirmed by FTIR, C-13 NMR spectra and differential scanning calorimetry (DSC). Compared with two homopolymers and random copolymers, the block copolymers of this study possess excellent thermal stability (5% thermal decomposition under nitrogen atmosphere above 500 C) and high glass transition temperatures, and have a wide melt-processing temperature range. They may become a new class of mouldable high performance thermoplastics. (C) 2001 Society of Chemical Industry.

  • CARDO PolyarylethersulfoneS AND POLYARYLETHERKETONES BEARING ALKYL SUBSTITUENTS ON THE PHENYLENE UNIT
    Journal of Macromolecular Science Part A, 2000
    Co-Authors: Zhonggang Wang, Tianlu Chen
    Abstract:

    A series of cardo polyaryletherketones and polyaryletersulfones containing alkyl substituents of a different kind, number and volume were synthesized from bis(4-nitrophenyl)ketone or bis(4-fluorophenyl)sulfone with various alkyl substituted phenol-phthaleins by polycondensation using K2CO3 as catalyst. Their chemical and aggregation structures were confirmed by FT-IR, 1H-NMR and WAXD. The resulting polymers were soluble in a variety of common polar solvents and, transparent, colorless, and tough films could be easily cast from 1,1,2-trichluoroethane solution. Their tensile strength, elongation at break and tensile modulis were in the range of 70.5∼97.1MPa, 4.49%∼7.81%, and 1.69∼2.27GPa, respectively. The prepared polymers had reasonably high glass transition temperatures at 207 to 269°C, and showed fairly good thermal stability with 5% thermal decomposition loss above 410°C.

  • Sequence analysis of fluorine‐containing Polyarylethersulfone copolymers by 13C–NMR
    Journal of Applied Polymer Science, 1994
    Co-Authors: Zhonggang Wang, Tianlu Chen
    Abstract:

    HexafluorobisA polyethersulfone-cardo polyethersulfone, random and block copolymers with different segment lengths were synthesized by a reaction of 4,4'-(hexafluoroisopropylidene)diphenol and 3,3'-bis(4-hydroxyphenyl)-1-isobenzopyrrolidone with bis(4-chl

  • sequence analysis of fluorine containing Polyarylethersulfone copolymers by 13c nmr
    Journal of Applied Polymer Science, 1994
    Co-Authors: Zhonggang Wang, Tianlu Chen
    Abstract:

    HexafluorobisA polyethersulfone-cardo polyethersulfone, random and block copolymers with different segment lengths were synthesized by a reaction of 4,4'-(hexafluoroisopropylidene)diphenol and 3,3'-bis(4-hydroxyphenyl)-1-isobenzopyrrolidone with bis(4-chl