Oxygen Permeability of Ba0.5Sr0.5Co0.8Fe0.2O5+δMembrane after Surface Modification

2013 ◽  
Vol 275-277 ◽  
pp. 2394-2397
Author(s):  
Zi Gang Shen ◽  
Dong Li
Keyword(s):  
Surface Modification ◽  
Thin Layer ◽  
Oxygen Permeability ◽  
Coating Layer ◽  
Oxygen Permeation

The oxygen permeation fluxes of Ba0.5Sr0.5Co0.8Fe0.2O5+(BSCF) membranes coated by RBaCo2O5+ (R= Pr, Nd, Sm, Gd) thin layer were investigated. The oxygen permeation fluxes of BSCF membranes with RBaCo2O5+ (R112)R112 coating layer can be enhanced remarkably. And it is found that the reaction of R112 with BSCF also have effect on the oxygen permeation fluxes. Impurity formed by the reaction of Pr112 with BSCF block oxygen permeation. While NdBaCo2O5+ and SmBaCo2O5+, especially GdBaCo2O5+ have no serious reaction with BSCF, they are desirable materials for coating layer of oxygen permeation membranes.

scholarly journals HYDROGELS FROM POLYACRYLIC ACID FOR REDUCTION OF BIOADHESION ON SILICONE CONTACT LENSES

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Zahida Ademović ◽  
Snježana Marić ◽  
Peter Kingshott ◽  
Zoran Iličković
Keyword(s):  
Surface Modification ◽  
Oxygen Permeability ◽  
Contact Lenses ◽  
Low Oxygen ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Lysozyme Adsorption ◽  
Tof Ms

Contact lenses suffer from two limitations: low oxygen permeability and deposition of protein and lipids. In order to prevent bioadhesion, surface must be completely inert to all biological reactions. To achieve this, surface properties must be tailored. Also, to improve comfort, surface must be highly wettable and lubricous. In this paper the surface of silicone contact lenses was modified by plasma induced copolymerization of acrylic acid. A wettable surface was generated and in addition carboxyl groups that were created on the surface provided an ideal reactive platform for subsequent grafting of polyethylene glycol. Each surface modification step was analysed by XPS and contact angle measurements. Lysozyme adsorption on modified silicone contact lenses was analysed by surface-MALDI-ToF-MS and XPS. After incubation with lysozyme, surface-MALDI-TOF-MS and XPS analysis showed a reduction of adsorbed lysozyme on hydrogel modified contact lenses. Surface modification of silicone with PEG is a method for reduction of protein adsorption on contact lenses.

scholarly journals Polydopamine-Assisted Surface Modification for Bone Biosubstitutes

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Shishu Huang ◽  
Nuanyi Liang ◽  
Yang Hu ◽  
Xin Zhou ◽  
Noureddine Abidi
Keyword(s):  
Tissue Engineering ◽  
Surface Modification ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Coating Layer ◽  
Tissue Scaffolds ◽  
Surface Modifier ◽  
Biomaterial Surface ◽  
Superior Surface ◽  
Unique Surface

Polydopamine (PDA) prepared in the form of a layer of polymerized dopamine (DA) in a weak alkaline solution has been used as a versatile biomimetic surface modifier as well as a broadly used immobilizing macromolecule. This review mainly discusses the progress of biomaterial surface modification inspired by the participation of PDA in bone tissue engineering. A comparison between PDA-assisted coating techniques and traditional surface modification applied to bone tissue engineering is first presented. Secondly, the chemical composition and the underlying formation mechanism of PDA coating layer as a unique surface modifier are interpreted and discussed. Furthermore, several typical examples are provided to evidence the importance of PDA-assisted coating techniques in the construction of bone biosubstitutes and the improvement of material biocompatibility. Nowadays, the application of PDA as a superior surface modifier in multifunctional biomaterials is drawing tremendous interests in bone tissue scaffolds to promote the osteointegration for bone regeneration.

Improving Performance of BaCo0.7Fe0.2Nb0.1O3-δ Ceramic Membrane by a Surface-Coating Layer for Partial Oxidation of Coke Oven Gas

2010 ◽  
Vol 154-155 ◽  
pp. 877-881 ◽  
Author(s):  
Hong Wei Cheng ◽  
Xiong Gang Lu ◽  
Da Hai Hu ◽  
Yu Wen Zhang ◽  
Wei Zhong Ding ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Surface Coating ◽  
Ceramic Membrane ◽  
Coating Layer ◽  
Coke Oven ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Coke Oven Gas ◽  
Oxygen Permeation Flux ◽  
Partial Oxidation Reforming

The BaCo0.7Fe0.2Nb0.1O3-δ (BCFNO) membranes combined with Ce0.8Re0.2O2-δ (Re=La, Y) layer on the permeation side were used for hydrogen production by partial oxidation reforming of coke oven gas (COG). The Ce0.8Re0.2O2-δ improved the oxygen permeation flux of the membrane by 11–28% at 750 oC. The high oxygen permeation flux achieved using the Ce0.8Re0.2O2-δ surface-coating layer in this work are quite encouraging with a maximum value reaching 19.7 ml/cm2•min at 900 oC, which will be promising surface modification materials in the catalytic partial oxidation reforming of COG.

La0.6Sr0.4Co0.2Fe0.8O3−δ hollow fibre membrane performance improvement by coating of Ba0.5Sr0.5Co0.9Nb0.1O3−δ porous layer

RSC Advances ◽  
2014 ◽  
Vol 4 (38) ◽  
pp. 19999-20004 ◽  
Author(s):  
Dezhi Han ◽  
Jinhu Wu ◽  
Zifeng Yan ◽  
Kun Zhang ◽  
Jian Liu ◽  
...  
Keyword(s):  
Surface Modification ◽  
Performance Improvement ◽  
Porous Layer ◽  
Hollow Fibre ◽  
Oxygen Permeation ◽  
Hollow Fibre Membrane ◽  
Membrane Performance ◽  
Fibre Membrane

The oxygen permeation performance of perovskite La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) hollow fibre membranes was enhanced by surface modification via coating of a Ba0.5Sr0.5Co0.9Nb0.1O3−δ (BSCN) porous layer.

Improving the oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3−δ membranes by a surface-coating layer of GdBaCo2O5+δ

2008 ◽  
Vol 28 (16) ◽  
pp. 3125-3130 ◽  
Author(s):  
Yingfang Wang ◽  
Haoshan Hao ◽  
Jianfeng Jia ◽  
Delin Yang ◽  
Xing Hu
Keyword(s):  
Surface Coating ◽  
Oxygen Permeability ◽  
Coating Layer

Effects of surface modification on the oxygen permeation of Ba0.5Sr0.5Co0.8Fe0.2O3−δ membrane

2014 ◽  
Vol 462 ◽  
pp. 147-152 ◽  
Author(s):  
Yoshiaki Hayamizu ◽  
Manami Kato ◽  
Hitoshi Takamura
Keyword(s):  
Surface Modification ◽  
Oxygen Permeation

scholarly journals Preparation and Oxygen Permeability of BaCo0.7Fe0.2Nb0.1O3-δMembrane Modified by Ce0.8Y0.2O2-δPorous Layer on the Air Side

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Yuan Qiang ◽  
Zhen Qiang ◽  
Li Rong
Keyword(s):  
Porous Layer ◽  
Oxygen Permeability ◽  
Ceramic Membrane ◽  
Coke Oven ◽  
Xrd Analysis ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Coke Oven Gas ◽  
Dense Ceramic ◽  
Oxygen Permeation Flux

BaCo0.7Fe0.2Nb0.1O3−δ(BCFN) dense ceramic membrane with submicron-Ce0.8Y0.2O2−δ(YDC) porous layer was investigated by the partial oxidation of coke oven gas (COG) in hydrogen production. XRD analysis showed this composite had good stability and no chemical reaction at high temperature. SEM and TEM characterization further showed BCFN membrane was uniformly modified by YDC porous layer (about 5~6 μm thickness) formed by the accumulation of relative nanoparticles. At the respective COG flux and air flux of 108 mL/min and 173 mL/min, the oxygen permeation flux of BCFN modified by submicron-YDC porous layer reached 16.62 mL·min−1·cm−2, which was about 23.5% higher than that of pure BCFN membrane. Therefore, submicron-YDC porous layer obviously improved the oxygen permeation flux of BCFN membrane and its stability at 875°C.

Oxygen Permeability of Mixed Conducting Perovskite Lanthanum Gallate-Based Ceramics

2006 ◽  
Vol 514-516 ◽  
pp. 412-416 ◽  
Author(s):  
Ekaterina D. Politova ◽  
Vladimir V. Aleksandrovskii ◽  
Sergey V. Zaitsev ◽  
G.M. Kaleva ◽  
Alexander V. Mosunov ◽  
...  
Keyword(s):  
Oxygen Permeability ◽  
Oxygen Permeation ◽  
Lanthanum Gallate ◽  
Electric Transport ◽  
Permeability Characteristics ◽  
Permeation Properties

The structure, microstructure, electric transport and oxygen permeation properties of (La,Sr)(Ga,Mg,Fe)O3-δ ceramics with perovskite or brownmillerite structures have been studied. Oxygen permeability values of ~0.1 cm3/cm2·min has been revealed at 1000 K for the ceramics studied. The correlation of electroconducting properties of the LaGaO3-based ceramics with perovskite and brownmillerite structures to their oxygen permeability characteristics has been proved.

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