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

2019 ◽  
Vol 7 (18) ◽  
pp. 11282-11297 ◽  
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.

Application of Multi-Layer Composite Membrane in Tricone Bit Bearing

2011 ◽  
Vol 314-316 ◽  
pp. 62-65 ◽  
Author(s):  
Ya Ling Qiu ◽  
Shi Bin Li ◽  
Wei He ◽  
Chuan Jun Han
Keyword(s):  
Chemical Composition ◽  
Magnetron Sputtering ◽  
Surface Topography ◽  
Composite Membrane ◽  
Abrasion Resistance ◽  
Composite Membranes ◽  
Abrasion Test ◽  
Layer Composite

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%.

scholarly journals Experimental Investigation of Fabricated Graphene Nanoplates/Polystyrene Nanofibrous Membrane for DCMD

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3499
Author(s):  
Ahmad Abdullah ◽  
Abdulaziz Al-Qahatani ◽  
Mohammed Alquraish ◽  
Colin Baily ◽  
Salah El-Mofty ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Positive Impact ◽  
Composite Membranes ◽  
Weight Percent ◽  
Membrane Distillation ◽  
Vital Role ◽  
Base Polymer ◽  
Stable Performance ◽  
Average Flux ◽  
Overall Performance

In recent decades, the fabrication of composite membranes using nanoparticles has played a vital role in membrane distillation (MD) technique. It could make available membranes with superior characteristics as excellent candidates for MD technique. The most well-known obstacles regarding the MD method are the low productivity and high cost. Thus, fabricating membranes with superior properties is a significant challenge. In the current study, a composite membrane has been fabricated using 0.25, 0.5, and 0.75 weight percent (wt.%) of graphene nanoparticles (GNPs) with polystyrene (PS) as a base polymer and characterized using SEM, FTIR, and contact angle. The characterization results prove the successful fabrication using electrospinning and the validity of the fabricated membranes to be applied to direct contact membrane distillation (DCMD). In addition, a DCMD experimental setup has been designed to examine the performance of the fabricated membranes and compare the performance of blank PS with composite PS/GNPs membranes. The results show that all fabricated membranes produced an approximately similar average flux of about 10 kg/m2 h, while the highest GNPs wt.% showed the highest salt rejection. Accordingly, this composite membrane has been examined at different operating parameters and showed stable performance. Moreover, feed temperature and the rate of flow have a positive impact on the overall performance of the DCMD.

Performance evaluation of novel PVDF–Cloisite 15A hollow fiber composite membranes for treatment of effluents containing dyes and salts using membrane distillation

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38011-38020 ◽  
Author(s):  
N. M. Mokhtar ◽  
W. J. Lau ◽  
A. F. Ismail ◽  
W. Youravong ◽  
W. Khongnakorn ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Composite Membrane ◽  
Hollow Fiber ◽  
Fiber Composite ◽  
Composite Membranes ◽  
Membrane Distillation ◽  
Hollow Fiber Composite Membrane ◽  
Cloisite 15A

Performances of a novel PVDF–Cloisite 15A hollow fiber composite membrane in treating a dyeing solution containing 50 ppm AR1 and 0.1–1.0 M NaCl.

scholarly journals Numerical Investigation of Fabricated MWCNTs/Polystyrene Nanofibrous Membrane for DCMD

Polymers ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 160
Author(s):  
Asmaa Elrasheedy ◽  
Mohammed Rabie ◽  
Ahmed El-Shazly ◽  
Mohamed Bassyouni ◽  
S.M.S. Abdel-Hamid ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Composite Membrane ◽  
Composite Membranes ◽  
Membrane Distillation ◽  
Nanofibrous Membrane ◽  
Permeate Flux ◽  
Water Contact ◽  
Static Water Contact Angle ◽  
Static Water

The effect of compositing multiwalled carbon nanotubes (MWCNTs) with polystyrene (PS) to fabricate nanofibrous membrane by electrospinning technique and comparing the direct contact membrane distillation (DCMD) performance of the blank and composite membranes is evaluated numerically. Surface morphology of both the pristine and the composite membrane was studied by SEM imaging while the average fiber diameter and average pore size were measured using ImageJ software. Static water contact angle and porosities were also determined for both membranes. Results showed significant enhancement in both the hydrophobicity and porosity of the composite membrane by increasing the static water contact angle from 145.4° for the pristine PS membrane to 155° for the PS/MWCNTs composite membrane while the porosity was increased by 28%. Simulation results showed that at any given feed inlet temperature, the PS/MWCNTs membrane have higher permeate flux and better overall system performance.

Anti-oil-fouling hydrophobic-superoleophobic composite membranes for robust membrane distillation performance

2019 ◽  
Vol 696 ◽  
pp. 133883 ◽  
Author(s):  
Min Tang ◽  
Deyin Hou ◽  
Chunli Ding ◽  
Kunpeng Wang ◽  
Dewu Wang ◽  
...  
Keyword(s):  
Composite Membranes ◽  
Membrane Distillation ◽  
Oil Fouling

Nafion/PBI Nanofiber Composite Membranes for Fuel Cells Applications

2010 ◽  
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.

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

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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