Application of Multi-Layer Composite Membrane in Tricone Bit Bearing

Composite membranes of TiN, WC/C and TiAlN+WC are successfully prepared by means of magnetron sputtering. An analysis of the membranes’ hardness, surface topography and chemical composition indicates that the composite membrane have a greater hardness, and are compact in structure and uniform in texture. A abrasion test is conducted by applying the three membranes respectively to tricone bit bearings, and then a comparison made between them and non-membrane tricone bit bearing leads to the finding that tricone bit bearing with TiAlN+WC/C composite membrane has the highest abrasion resistance, with a dramatic increase of 30%~40%.

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Robust superhydrophobic dual layer nanofibrous composite membranes with a hierarchically structured amorphous polypropylene skin for membrane distillation

Journal of Materials Chemistry A ◽

10.1039/c9ta02662b ◽

2019 ◽

Vol 7 (18) ◽

pp. 11282-11297 ◽

Cited By ~ 17

Author(s):

Li Deng ◽

Peiyun Li ◽

Kang Liu ◽

Xuefen Wang ◽

Benjamin S. Hsiao

Keyword(s):

Composite Membrane ◽

Composite Membranes ◽

Membrane Distillation ◽

Layer Composite

A novel superhydrophobic aPP/PVDF dual layer composite membrane consisting of a hierarchically structured selective skin from aPP and a PVDF nanofibrous support for efficient desalination by DCMD.

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Nafion/PBI Nanofiber Composite Membranes for Fuel Cells Applications

ASME 2010 8th International Fuel Cell Science, Engineering and Technology Conference: Volume 2 ◽

10.1115/fuelcell2010-33025 ◽

2010 ◽

Cited By ~ 1

Author(s):

Tzyy-Lung Leon Yu ◽

Shih-Hao Liu ◽

Hsiu-Li Lin ◽

Po-Hao Su

Keyword(s):

Thin Film ◽

Fuel Cell ◽

Composite Membrane ◽

Fiber Composite ◽

Composite Membranes ◽

Cell Performance ◽

Membrane Electrode ◽

Membrane Thickness ◽

Fuel Cell Performance ◽

Nano Fiber

The PBI (poly(benzimidazole)) nano-fiber thin film with thickness of 18–30 μm is prepared by electro-spinning from a 20 wt% PBI/DMAc (N, N′-dimethyl acetamide) solution. The PBI nano-fiber thin film is then treated with a glutaraldehyde liquid for 24h at room temperature to proceed chemical crosslink reaction. The crosslink PBI nano-fiber thin film is then immersed in Nafion solutions to prepare Nafion/PBI nano-fiber composite membranes (thickness 22–34 μm). The morphology of the composite membranes is observed using a scanning electron microscope (SEM). The mechanical properties, conductivity, and unit fuel cell performance of membrane electrode assembly (MEA) of the composite membrane are investigated and compared with those of Nafion-212 membrane (thickness ∼50 μm) and Nafion/porous PTFE (poly(tetrafluoro ethylene)) composite membrane (thickness ∼22 μm). We show the present composite membrane has a similar fuel cell performance to Nafion/PTFE and a better fuel cell performance than Du Pont Nafion-212.

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Effect of Substrate Sodium Content on Crystallization and Photocatalytic Activity of TiO2Films Prepared by DC Magnetron Sputtering

International Journal of Photoenergy ◽

10.1155/2007/95213 ◽

2007 ◽

Vol 2007 ◽

pp. 1-5 ◽

Cited By ~ 15

Author(s):

Henryk Tomaszewski ◽

Karin Eufinger ◽

Hilde Poelman ◽

Dirk Poelman ◽

Roger De Gryse ◽

...

Keyword(s):

Photocatalytic Activity ◽

Chemical Composition ◽

Magnetron Sputtering ◽

Soda Lime ◽

Sodium Concentration ◽

Sodium Content ◽

Soda Lime Glass ◽

Dc Magnetron Sputtering ◽

Amorphous Films ◽

Glass Support

The effect of sodium content of the glass support on the crystallinity of sputteredTiO2films and photocatalytic breakdown of ethanol has been studied. It was found that the activity of the as-deposited (amorphous) films does not depend on the type of support used. The chemical composition of the glass support does influence the activity of annealed films. When using soda-lime glass support sodium diffuses into the film upon annealing, suppressing anatase crystallization and decreasing its photocatalytic activity. To decrease the influence of sodium, soda-lime glass coated with an e-beam evaporatedSiO2barrier layer was used with good result. A reduced sodium concentration in the film leads to well crystallized anatase after annealing. An increased photocatalytic activity was observed for these films.

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Unprecedented SPEEK-trimetal Oxide Composites: Physicochemical and Electrochemical Performance in Fuel Cell

10.21203/rs.3.rs-339667/v1 ◽

2021 ◽

Author(s):

Gandhimathi Sivasubramanian ◽

Senthil Andavan Gurusamy Thangavelu ◽

Berlina Maria Mahimai ◽

Krishnan Hariharasubramanian ◽

PARADESI DEIVANAYAGAM

Keyword(s):

Fuel Cell ◽

Electrochemical Performance ◽

Composite Membrane ◽

Composite Membranes ◽

Membrane Electrode Assembly ◽

Membrane Electrode ◽

Ether Ether Ketone ◽

Poly Ether Ether Ketone ◽

Maximum Water ◽

Oxide Composites

Abstract Advanced polymer composite membranes were prepared from a linear sulfonated poly(ether ether ketone) (SPEEK) with bismuth cobalt zinc oxide [BCZO, (Bi2O3)0.07(CoO)0.03(ZnO)0.90] nanopowder as an inorganic additive for the application of H2-O2 fuel cell. Morphology data tend to provide evidences for the incorporation of BCZO into SPEEK polymer. Indeed, composite membrane loaded with 7.5 wt.% of BCZO was identified to uptake maximum water, while the pristine SPEEK membrane occurred to retain only 24.0 %. As such SPEEK matrix loaded with 7.5 wt.% of BCZO was found to exhibit the maximum proton conductivity of 0.030 S cm-1, whereas the pristine membrane was restricted to 0.021 S cm-1. Evidently, TGA profile of the composite membrane was measured to exhibit sufficient thermal stability to employ as electrolyte in fuel cell. The membrane electrode assembly of pristine SPEEK and SP-BCZO-7.5 wt.% membranes were fabricated and studied for their electrochemical performance. Indeed, the characteristics of newly developed composite membranes led to possess incredible feature towards fuel cell applications.

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Thin Film Nanofibrous Composite Membrane for Dead-End Seawater Desalination

Journal of Nanomaterials ◽

10.1155/2016/2694373 ◽

2016 ◽

Vol 2016 ◽

pp. 1-12 ◽

Cited By ~ 7

Author(s):

Baturalp Yalcinkaya ◽

Fatma Yalcinkaya ◽

Jiri Chaloupek

Keyword(s):

Thin Film ◽

Active Layer ◽

Composite Membrane ◽

Interfacial Polymerization ◽

Composite Membranes ◽

Nanofibrous Scaffold ◽

Filtration Method ◽

Salt Ions ◽

Dead End ◽

Supporting Material

The aim of the study was to prepare a thin film nanofibrous composite membrane utilized for nanofiltration technologies. The composite membrane consists of a three-layer system including a nonwoven part as the supporting material, a nanofibrous scaffold as the porous surface, and an active layer. The nonwoven part and the nanofibrous scaffold were laminated together to improve the mechanical properties of the complete membrane. Active layer formations were done successfully via interfacial polymerization. A filtration test was carried out using solutions of MgSO4, NaCl, Na2SO4, CaCl2, and real seawater using the dead-end filtration method. The results indicated that the piperazine-based membrane exhibited higher rejection of divalent salt ions (>98%) with high flux. In addition, them-phenylenediamine-based membrane exhibited higher rejection of divalent and monovalent salt ions (>98% divalent and >96% monovalent) with reasonable flux. The desalination of real seawater results showed that thin film nanofibrous composite membranes were able to retain 98% of salt ions from highly saline seawater without showing any fouling. The electrospun nanofibrous materials proved to be an alternative functional supporting material instead of the polymeric phase-inverted support layer in liquid filtration.

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Bioactivity of the Two Kinds of Biodegradable Composite Membrane Containing Oriented Needle-Like Apatite

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.284-286.811 ◽

2005 ◽

Vol 284-286 ◽

pp. 811-814 ◽

Cited By ~ 1

Author(s):

Toshiki Itoh ◽

Seiji Ban ◽

T. Watanabe ◽

Shozo Tsuruta ◽

Takahiro Kawai ◽

...

Keyword(s):

Bone Formation ◽

Composite Membrane ◽

Composite Membranes ◽

Bone Defects ◽

Thigh Muscle ◽

Poly Lactic Acid ◽

New Bone Formation ◽

Biodegradable Composite ◽

Morphogenetic Protein ◽

Old Mice

It is well known that bone morphogenetic protein (BMP) induces bone formation and requires for carriers. Poly-lactic acid / poly-glycolic acid (PLGA) is frequently used as the carriers of BMP. We developed a biodegradable composite PLGA membrane, which was containing oriented needle-like apatite with BMP. The composite membranes were implanted into the thigh muscle pouch of 3-week-old-mice. At 3 weeks after implantation, the implanted area was observed by optical microscopy. The composite membrane containing oriented needle-like apatite with BMP induced new bone formation. It seems that this composite membrane might be a scaffold of BMP and promoting the healing of bone defects.

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Fabrication of Multi-Layer Composite Membranes with Excellent CO2 Permeability and Selectivity for Gas Separation Process

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2017.14785 ◽

2017 ◽

Vol 17 (10) ◽

pp. 7735-7742 ◽

Cited By ~ 1

Author(s):

Yun Hwan Park ◽

Mi Ae Song ◽

Chi Hoon Park ◽

Sang Yong Nam

Keyword(s):

Gas Separation ◽

Composite Membranes ◽

Separation Process ◽

Layer Composite

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Mechanical and Water-Resistant Properties of Eco-Friendly Chitosan Membrane Reinforced with Cellulose Nanocrystals

Polymers ◽

10.3390/polym11010166 ◽

2019 ◽

Vol 11 (1) ◽

pp. 166 ◽

Cited By ~ 12

Author(s):

Haiquan Mao ◽

Chun Wei ◽

Yongyang Gong ◽

Shiqi Wang ◽

Wenwen Ding

Keyword(s):

Composite Membrane ◽

Cellulose Nanocrystals ◽

Water Resistance ◽

Acetic Acid Solution ◽

Composite Membranes ◽

Environmentally Benign ◽

Great Length ◽

Mechanical Mixing ◽

Chitosan Membrane ◽

Free Membrane

Environmentally benign and biodegradable chitosan (CS) membranes have disadvantages such as low mechanical strength, high brittleness, poor heat resistance and poor water resistance, which limit their applications. In this paper, home-made cellulose nanocrystals (CNC) were added to CS to prepare CNC/CS composite membranes through mechanical mixing and solution casting approaches. The effects of CNC dispersion patterns and CNC contents on the properties of composite membranes were studied. The analysis of the surface and cross-section morphology of the membranes showed that the dispersion performance of the composite membrane was better in the case that CNC was dissolved in an acetic acid solution and then mixed with chitosan by a homogenizer (Method 2). CNC had a great length-diameter ratio and CNC intensely interacted with CS. The mechanical properties of the composite membrane prepared with Method 2 were better. With a CNC content of 3%, the tensile strength of the composite membrane reached 43.0 MPa, 13.2% higher than that of the CNC-free membrane. The elongation at break was 41.6%, 56.4% higher than that of the CNC-free membrane. Thermogravimetric, contact angle and swelling analysis results showed that the addition of CNC could improve the heat and water resistance of the chitosan membrane.

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