scholarly journals In situ polymerization of graphene-polyaniline@polyimide composite films with high EMI shielding and electrical properties

RSC Advances ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 2368-2377 ◽  
Author(s):  
Kui Cheng ◽  
Haoliang Li ◽  
Mohan Zhu ◽  
Hanxun Qiu ◽  
Junhe Yang
Keyword(s):  
Electrical Properties ◽  
Electromagnetic Interference ◽  
In Situ Polymerization ◽  
Composite Films ◽  
Critical Issue ◽  
Electronics Industry ◽  
Emi Shielding

With the increasing demands of the electronics industry, electromagnetic interference (EMI) shielding has become a critical issue that severely restricts the application of devices.

High-density polyethylene/graphene oxide nanocomposites prepared via in situ polymerization: Morphology, thermal, and electrical properties

2018 ◽  
Vol 16 ◽  
pp. 232-241 ◽  
Author(s):  
Antonio Cruz-Aguilar ◽  
Dámaso Navarro-Rodríguez ◽  
Odilia Pérez-Camacho ◽  
Salvador Fernández-Tavizón ◽  
Carlos Alberto Gallardo-Vega ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrical Properties ◽  
High Density Polyethylene ◽  
In Situ Polymerization ◽  
High Density ◽  
Thermal And Electrical Properties

Electromagnetic interference shielding study in microwave and NIR regions by highly efficient Ag/ZnS and polyaniline-Ag/ZnS particles

2021 ◽  
pp. 089270572110649
Author(s):  
Muhammad Zahid ◽  
HM Fayzan Shakir ◽  
Zulfiqar Ahmad Rehan
Keyword(s):  
Electromagnetic Interference ◽  
Near Infrared ◽  
Oxidative Polymerization ◽  
Composite Films ◽  
Nir Spectroscopy ◽  
Infrared Region ◽  
Nanocomposite Films ◽  
Emi Shielding ◽  
Zns Nanoparticles ◽  
Co Precipitation

The chemical oxidative polymerization and co-precipitation methods were employed for the preparations of polyaniline (PANI) and silver-doped zinc sulfide (ZnS) nanoparticles to be used for electromagnetic interference (EMI) shielding. PVC-based composite films were fabricated by the incorporation of Ag/ZnS and PANI-Ag/ZnS nanoparticles. These nanoparticles were first analyzed by X-ray diffraction and zetasizer for their crystal structure and particle size. Prepared nanocomposite films were then analyzed for various properties like electrical conductivity, transmission in the near-infrared region (700 nm to 2500 nm), and EMI shielding efficiency in the microwave region (0.1 GHz to 20 GHz). These parameters were characterized by DC Conductivity, NIR spectroscopy, and vector network analyzer. It was found that with the addition of the concentration of nanoparticles, both values of conductivity and shielding efficiency improved. The highest attenuation value in 0.1 to 20 GHz reached 52.5 dB in 0.1 to 20 GHz frequency for 20 wt% PANI-Ag/ZnS and < 0.5% transmission was evaluated in the NIR region.

scholarly journals Incorporation of Conductive Materials into Hydrogels for Tissue Engineering Applications

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1078 ◽  
Author(s):  
Ji Min ◽  
Madhumita Patel ◽  
Won-Gun Koh
Keyword(s):  
Tissue Engineering ◽  
Electrical Properties ◽  
Cardiac Tissue ◽  
In Situ Polymerization ◽  
Nerve Tissue ◽  
Conductive Materials ◽  
Conductive Hydrogel ◽  
Conductive Hydrogels ◽  
Electrical Properties Of Tissues

In the field of tissue engineering, conductive hydrogels have been the most effective biomaterials to mimic the biological and electrical properties of tissues in the human body. The main advantages of conductive hydrogels include not only their physical properties but also their adequate electrical properties, which provide electrical signals to cells efficiently. However, when introducing a conductive material into a non-conductive hydrogel, a conflicting relationship between the electrical and mechanical properties may develop. This review examines the strengths and weaknesses of the generation of conductive hydrogels using various conductive materials such as metal nanoparticles, carbons, and conductive polymers. The fabrication method of blending, coating, and in situ polymerization is also added. Furthermore, the applications of conductive hydrogel in cardiac tissue engineering, nerve tissue engineering, and bone tissue engineering and skin regeneration are discussed in detail.

scholarly journals Facile approach for a robust graphene/silver nanowires aerogel with high-performance electromagnetic interference shielding

RSC Advances ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Xiaoting Liu ◽  
Tianrui Chen ◽  
Hao Liang ◽  
Faxiang Qin ◽  
Hui Yang ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Electrical Properties ◽  
Electromagnetic Interference ◽  
High Performance ◽  
Silver Nanowires ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding ◽  
High Compressive Strength

We report a facile, eco-friendly approach to prepare the robust graphene/silver nanowires aerogel with high compressive strength and excellent EMI shielding performance due to its unique nanostructure and good electrical properties.

Structure and Electrical Properties of ZnO Nanoparticles Blend with POT-DBSA

2020 ◽  
Vol 1002 ◽  
pp. 114-122
Author(s):  
Dalal K. Thbayh ◽  
Rawnaq A. Talib ◽  
Dalal N. Ahilfi ◽  
Tahseen A. Alaridhee ◽  
Kareema M. Ziadan
Keyword(s):  
Zno Nanoparticles ◽  
In Situ Polymerization ◽  
Composite Films ◽  
Dodecylbenzene Sulfonate ◽  
Thin Film Layer ◽  
Film Layer ◽  
Layer Contact ◽  
Diffraction Patterns

In this study, we report on a successful preparation nanocomposites poly (o-toluidine) (POT) doping with dodecylbenzene sulfonate acid (DBSA)/ ZnO by in-situ polymerization of (o-toluidine) monomer using ZnO nanoparticles (the weight ratios OT/ZnO: 1/5%, 1/10%, 1/15%). The composite films have been prepared by using the casting method on different substrate depending on the type of measurement. The surface morphology properties of the prepared samples were studied by the field emission scanning electron microscopy (FESEM). The results of FESEM indicate that ZnO nanoparticles were successfully embedded in the POT via chemical interactions between ZnO and (O-toluidine) monomer and the EDX spectrum showed the presence of element Zn in POT-DBSA/ZnO composites. The crystal structure was measured by x-ray directional and its pattern revealed the presence of ZnO in dopant polymer, in the diffraction patterns of POT-DBSA. The intensity of the peaks was increased as the amount of ZnO nanoparticles increased in POT-DBSA. The typical rectifying behaviour indicated that the formation of a diode observes by the I–V characterization of POT-DBSA/ZnO composites at thin film layer with top Al thin layer contact.

Fabrication and characterization of organic semiconductor for electromagnetic interference shielding material

2011 ◽  
Vol 31 (4) ◽  
Author(s):  
Habibun Nabi Muhammad Ekramul Mahmud ◽  
Anuar Kassim
Keyword(s):  
Conducting Polymer ◽  
Polymer Composite ◽  
Indium Tin Oxide ◽  
Electromagnetic Interference ◽  
Composite Films ◽  
Oxide Glass ◽  
Poly Vinyl Alcohol ◽  
Shielding Effectiveness ◽  
Emi Shielding ◽  
Shielding Material

Abstract Conducting polymer films produced by electropolymerization technique are highly conductive, simple, and suitable for use especially in electronic devices. An attempt has been made to produce polypyrrole-poly(vinyl alcohol) (PPy-PVA) conducting polymer composite films using 0.1 m p-toluene sulfonate dopant at a potential of 1.2 V (vs. standard calomel electrode) on indium tin oxide glass electrode. The potential application of the prepared PPy-PVA conducting polymer composite films as an electromagnetic interference (EMI) shielding material has been investigated in the present study. The EMI shielding effectiveness of PPy-PVA composite films prepared from different experimental conditions was analyzed in the microwave frequency range of 8–12 GHz. The shielding effectiveness of 45.67–35.7 dB has been demonstrated by PPy-PVA conducting polymer composite films, which appears to be very attractive in any EMI shielding applications where a minimum shielding effectiveness of 35 dB is required.

Fabrication and Ultraviolet Characterization of Potassium Sodium Niobate/Polyimide Hybrid Films

2013 ◽  
Vol 395-396 ◽  
pp. 121-124
Author(s):  
Jia Qi Lin ◽  
Pan Pan Zhang ◽  
Wen Long Yang
Keyword(s):  
In Situ Polymerization ◽  
Composite Films ◽  
Polymerization Process ◽  
Sodium Niobate ◽  
Hybrid Films ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium

A functional potassium sodium niobate/polyimide (KNN/PI) composite films were prepared in this paper. KNN fillers are well dispersed in the PI matrix without any accumulation through in situ polymerization process. The optical band baps of the hybrid films become smaller with the increase of KNN loading. The optical band baps of the films with 0-20 wt% KNN filler are estimated to be 2.61 eV, 2.57 eV, 2.52 eV, 4.29 eV, 2.35 eV respectively.

Ultrathin graphene: electrical properties and highly efficient electromagnetic interference shielding

2015 ◽  
Vol 3 (26) ◽  
pp. 6589-6599 ◽  
Author(s):  
Mao-Sheng Cao ◽  
Xi-Xi Wang ◽  
Wen-Qiang Cao ◽  
Jie Yuan
Keyword(s):  
Electrical Properties ◽  
Information Security ◽  
Rapid Growth ◽  
Electromagnetic Interference ◽  
Electromagnetic Waves ◽  
Electronic Devices ◽  
Strong Absorption ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding ◽  
Electromagnetic Pollution

Ultrathin graphene, a 2D material, demonstrates outstanding features and rapid growth for EMI shielding due to its strong absorption towards electromagnetic waves in composites. It is sought after for communication, electronic devices, information security, electromagnetic pollution defense and healthcare.

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