Flexible polyaniline-coated poplar fiber composite membranes with effective electromagnetic shielding performance

Vacuum ◽  
2019 ◽  
Vol 170 ◽  
pp. 108990 ◽  
Author(s):  
Kun Zhang ◽  
Xue Gu ◽  
Qian Dai ◽  
Bingnan Yuan ◽  
Yue Yan ◽  
...  
Keyword(s):  
Fiber Composite ◽  
Composite Membranes ◽  
Electromagnetic Shielding

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 Lightweight and flexible MXene/CNF/silver composite membranes with a brick-like structure and high-performance electromagnetic-interference shielding

RSC Advances ◽  
2019 ◽  
Vol 9 (51) ◽  
pp. 29636-29644 ◽  
Author(s):  
Wei Xin ◽  
Guo-Qiang Xi ◽  
Wen-Tao Cao ◽  
Chang Ma ◽  
Tong Liu ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
High Performance ◽  
Composite Membranes ◽  
Electromagnetic Shielding ◽  
Electromagnetic Interference Shielding ◽  
Shielding Material ◽  
Silver Composite

Flexible and lightweight MXene/CNF/silver composite membranes are vacuum filtered to form a high electromagnetic shielding material with a brick-like structure. The membranes have an excellent electromagnetic shielding performance of 50.7 dB.

Modified poly(vinylidene fluoride) hollow fiber composite membranes reinforced by hydroxyapatite nanocrystal whiskers

2012 ◽  
Vol 127 (6) ◽  
pp. 4564-4572 ◽  
Author(s):  
Wan-Zhong Lang ◽  
Qin Ji ◽  
Jian-Ping Shen ◽  
Ya-Jun Guo ◽  
Lian-Feng Chu
Keyword(s):  
Hollow Fiber ◽  
Vinylidene Fluoride ◽  
Fiber Composite ◽  
Composite Membranes ◽  
Poly Vinylidene Fluoride

Simulation and experimentation of wide frequency electromagnetic shielding coating used for carbon fiber composite materials of track vehicles

2019 ◽  
Vol 33 (01n03) ◽  
pp. 1940020 ◽  
Author(s):  
Ming Gong ◽  
Shou-Guang Sun ◽  
Lin Sun ◽  
Ai-Qin Tian ◽  
Qiang Li
Keyword(s):  
Computer Simulation ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Electromagnetic Shielding ◽  
Shielding Effectiveness ◽  
Frequency Range ◽  
Simulation Technology ◽  
Carbon Fiber Composite ◽  
Fiber Composite Materials

Computer Simulation Technology EM and Computer Simulation Technology Microwave Studio electromagnetic simulation software were used to simulate the carbon fiber composite materials with a new type of wide frequency electromagnetic shielding coating. DC magnetic field, low-frequency electromagnetic fields, and mid-high frequency electromagnetic shielding effectiveness analysis model were established in order to study the influence of permeability, conductivity, coating thickness and other parameters in the typical frequency range research on the shielding effectiveness. The results show that the composite coating material with reasonable design can effectively enhance the electromagnetic shielding performance of carbon fiber composite materials in the DC [Formula: see text]18 GHz frequency range.

Preparation and characterization of PFSA–PVA–SiO2/PVA/PAN difunctional hollow fiber composite membranes

2010 ◽  
Vol 360 (1-2) ◽  
pp. 315-322 ◽  
Author(s):  
Xiao-Hua Ma ◽  
Zhen-Liang Xu ◽  
Yang Liu ◽  
De Sun
Keyword(s):  
Hollow Fiber ◽  
Fiber Composite ◽  
Composite Membranes
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