scholarly journals Improved microwave absorption in lightweight resin-based carbon foam by decorating with magnetic and dielectric nanoparticles

RSC Advances ◽  
2014 ◽  
Vol 4 (45) ◽  
pp. 23476-23484 ◽  
Author(s):  
R. Kumar ◽  
A. P. Singh ◽  
M. Chand ◽  
R. P. Pant ◽  
R. K. Kotnala ◽  
...  
Keyword(s):  
Electromagnetic Radiation ◽  
Microwave Absorption ◽  
Zno Nanoparticles ◽  
Carbon Foam ◽  
Radiation Shielding ◽  
Shielding Effectiveness ◽  
Absorption Component

Carbon foam (CFoam) decorated with Fe3O4–ZnO nanoparticles significantly improved electromagnetic radiation shielding effectiveness which is mainly dominated by absorption component.

scholarly journals Hybrid knitted fabric for electromagnetic radiation shielding

2020 ◽  
Vol 15 ◽  
pp. 155892502092539
Author(s):  
Veronika Tunakova ◽  
Maros Tunak ◽  
Vladimir Bajzik ◽  
Larysa Ocheretna ◽  
Svitlana Arabuli ◽  
...  
Keyword(s):  
Electromagnetic Radiation ◽  
Circulatory System ◽  
Endocrine System ◽  
Electromagnetic Shielding ◽  
Radiation Shielding ◽  
Raw Material ◽  
Shielding Effectiveness ◽  
New Production ◽  
Protective Material ◽  
Knitted Structure

Today we can’t imagine our life without electricity and technology, transport and television. In the information age, computers, the Internet, cell phones, and smartphones are helpers for everyday needs. However, our environment and comfortable living in it can be detrimental to our health. It is hard to realize the fact that such a global technical breakthrough has hit human health. Exposure to electromagnetic radiation could lead to changes in the structure of nerve cells and blood formulas, deformation of the circulatory system, pathology of the endocrine system, decreased immunity, and so on. Nowadays the development of innovative textiles with electromagnetic radiation shielding is a relevant topic that promotes the creation of a flexible protective screen for the human being and various electronic devices. Textiles themselves do not protect against electromagnetic radiation; however, the textiles can be successfully converted into protective material after changing the raw material composition, creating a new production process, or adapting technologies that can make them electrically conductive. Basic methods of textile producing such as weaving, knitting, non-weaving, or their combination can be used to make electromagnetic shielding fabric. In this study, the knitting on 8-gauge flat-bed machine has been chosen as main technology. The metal wire (stainless steel: 0.12 mm) is used separately or together with 10 × 2 tex cotton yarn. Two sets of samples with different interloopings are produced which differ by steel percentages and positioning in the structures. Electromagnetic shielding effectiveness of textile samples (dB) was measured according to ASTM 4935-10 on frequency range 30 MHz–1.5 GHz. It is concluded that the positioning of the metal components in the knitted structure is the main factor determining the shielding ability. The half Milano rib knitted structure demonstrates the highest shielding efficiency.

scholarly journals Інтер'єрний текстиль з екрануючими властивостями до дії електромагнітного випромінювання

2020 ◽  
pp. 145-155
Author(s):  
С. І. Арабулі ◽  
О. П. Кизимчук ◽  
А. Т. Арабулі ◽  
В. І. Власенко ◽  
В. Байзік ◽  
...  
Keyword(s):  
Electromagnetic Radiation ◽  
Materials Science ◽  
Experimental Studies ◽  
Woven Fabrics ◽  
Radiation Shielding ◽  
Practical Significance ◽  
Shielding Effectiveness ◽  
Textile Materials ◽  
Textile Fabrics ◽  
Interior Textile

The purpose. An investigation of the shielding effectiveness against electromagnetic radiation (EMR) by woven fabrics that are presented on the Ukrainian interior textile market. Methodology. Theoretical and experimental research is based on the general principles of textile materials science. The shielding effectiveness to EMR of textile fabrics was tested and measured using EM-2107A (Electro Metrics) in accordance with ASTM 4935-10 in the frequency range 30 MHz – 1.5 GHz. Results. Flexible screens based on textile materials are widely used for EMR shielding. The shielding effectiveness against EMR by textile materials can be improved with fabric modifying by metal fibers/threads, metal particles or conductive polymers at various stages of textile production. It possible to substantiate the expediency of using metal-containing textile materials as interior textiles on the result of carried out analysis of the modern assortment of interior textiles and the experimental studies. Studies results have shown that the proposed fabrics have a high shielding ability by the classification "professional use" according to FTTS-FA-003 Specified Requirements of Electromagnetic Shielding Textiles, the shielding efficiency of which is within 30 ÷ 60 dB. Scientific novelty. The expediency of using modern metal-containing textile materials as interior textiles for windows decoration has been substantiated. The studied textile materials make it possible to clarify a new promising segment of the interior textile market - windows decoration. The main goal of such textile - the decoration of the residential and administrative buildings is expanded and supplemented by the function of electromagnetic radiation shielding. Practical significance. The complex of scientific research on the shielding effectiveness against EMR allowed offering a new range of interior textile materials for window decoration.

scholarly journals Nanoparticles-decorated coal tar pitch-based carbon foam with enhanced electromagnetic radiation absorption capability

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20256-20264 ◽  
Author(s):  
Rajeev Kumar ◽  
Ashish Gupta ◽  
Sanjay R. Dhakate
Keyword(s):  
Electromagnetic Radiation ◽  
Coal Tar ◽  
Carbon Foam ◽  
Frequency Region ◽  
Radiation Absorption ◽  
Coal Tar Pitch ◽  
Band Frequency ◽  
X Band

Carbon foam decorated with magnetic and dielectric nanoparticles exhibited significantly improved EM radiation absorption in the X-band frequency region.

scholarly journals ТЕКСТИЛЬ ДЛЯ ЗАХИСТУ ВІД ЕЛЕКТРОМАГНІТНОГО ВИПРОМІНЮВАННЯ

2019 ◽  
Vol 134 (3) ◽  
pp. 48-61
Author(s):  
О. П. Кизимчук ◽  
С. І. Арабулі ◽  
В. І. Власенко
Keyword(s):  
Electromagnetic Radiation ◽  
Electromagnetic Interference ◽  
Scientific Literature ◽  
Radiation Shielding ◽  
Production Methods ◽  
Textile Materials ◽  
Basic Production ◽  
Materials Used

Analysis  of  existing  textile  materials  used  for  electromagnetic  radiation  shielding,  their systematization, and basic production methods are the main goals of this review. Methodology. The review of scientific literature and the systematization of the results in the field "textile materials for electromagnetic interference" are the main methods used for this research.

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