scholarly journals Study on Some Thermal and Electrical Properties of Basalt Fabric Modified with Metal and Ceramics as a Result of Magnetron Sputtering

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2087
Author(s):  
Pamela Miśkiewicz ◽  
Iwona Frydrych ◽  
Magdalena Tokarska ◽  
Wojciech Pawlak
Keyword(s):  
Electrical Properties ◽  
Magnetron Sputtering ◽  
Imaging System ◽  
Radiant Heat ◽  
Original Method ◽  
Color Measurement ◽  
Contact Heat ◽  
Instrumental Color ◽  
Thermal And Electrical Properties ◽  
Fabric Surface

The main aim of the research was to compare the values of some thermal and electrical parameters obtained for a basalt fabric modified with the metal and ceramics coatings. The surface modification of basalt fabric was made by using a magnetron sputtering technique. Chrome and zirconium(IV) oxide coatings were deposited on the fabric surface. The thermal and electrical properties of selected fabrics were determined. In order to assess the comfort properties of fabrics, the thermal resistance of materials was analyzed. Instrumental color measurement was used for an assessment of the surface of modified and unmodified basalt fabric. Using a non-contact digital color imaging system, DigiEye, an original method of samples surface analysis was presented. As a result of research, the modification of basalt fabric surface for applications in a hot work environment enabled the improvement of thermal properties in relation to the references samples. The first level of protection against contact heat for a contact temperature of 100 °C was obtained for the zirconium(IV) oxide-modified basalt fabric. The first level of protection against radiant heat was obtained for all samples. The highest value for the heat radiant resistance was obtained for the chrome-modified basalt fabric.

scholarly journals Assessment of Coating Quality Obtained on Flame-Retardant Fabrics by a Magnetron Sputtering Method

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1348
Author(s):  
Pamela Miśkiewicz ◽  
Magdalena Tokarska ◽  
Iwona Frydrych ◽  
Marcin Makówka
Keyword(s):  
Magnetron Sputtering ◽  
Flame Retardant ◽  
Imaging System ◽  
Sample Surface ◽  
Radiant Heat ◽  
Cotton Fabrics ◽  
Point Of View ◽  
Thermal Parameters ◽  
Coating Quality ◽  
Contact Heat

Innovative textile materials can be obtained by depositing different coatings. To improve the thermal properties of textiles, aluminum and zirconium (IV) oxides were deposited on the Nomex® fabric, basalt fabric, and cotton fabric with flame-retardant finishing using the magnetron sputtering method. An assessment of coating quality was conducted. Evenly coated fabric ensures that there are no places on the sample surface where the values of thermal parameters such as resistance to contact heat and radiant heat deviate significantly from the specified ones. Energy-dispersive spectroscopy was used for the analysis of modified fabric surfaces. Non-contact digital color imaging system DigiEye was also used. The criterion allowing one to compare surfaces and find which surface is more evenly coated was proposed. The best fabrics from the point of view of coating quality were basalt and cotton fabrics coated with aluminum as well as basalt fabric coated with zirconia. The probability of occurrence of places on the indicated sample surfaces where the values of thermal parameters (i.e., resistance to contact heat and radiant heat) deviated significantly from the specified ones was smaller for Nomex® and cotton fabrics coated with zirconia and Nomex® fabric coated with aluminum.

The influence of basalt fabrics modifications on their resistance to contact heat and comfort properties

2019 ◽  
Vol 31 (6) ◽  
pp. 874-886
Author(s):  
Pamela Miśkiewicz ◽  
Iwona Frydrych ◽  
Wojciech Pawlak
Keyword(s):  
Magnetron Sputtering ◽  
Gas Phase ◽  
Thermal Insulation ◽  
Basalt Fiber ◽  
Chemical Compounds ◽  
Contact Heat ◽  
Specific Chemical ◽  
Content Type ◽  
Physical Deposition ◽  
Fabric Surface

Purpose The purpose of this paper is to present the influence of modifying the fabric surface made from basalt fibers by the magnetron sputtering of chromium and aluminum layers on its resistance to contact heat and comfort properties. Design/methodology/approach In order to modify the surface of basalt fabric, the process of physical deposition from the gas phase was used. It relies on creating a coating on a selected substrate by applying physical atoms, molecules or ions of specific chemical compounds. The trial of modification was carried out using the magnetron sputtering method due to the material versatility, application flexibility and ability to apply layers on substrates of various sizes and properties. Findings The findings obtained regarding the heat resistance to contact heat and thermal insulation (comfort) properties show different values depending on the type of metal deposited and the thickness of coating layer. It was found that the modification of basalt fabric surface at the micrometer level changes the tested parameters. Research limitations/implications This paper presents the results of resistance to contact heat and thermal insulation properties only for the twill fabric made of basalt fiber. The surface modification of fabric was carried out using the chromium and aluminum of two values of layer thickness (1 and 5 µm). Originality/value So far, no tests have been carried out to modify the surface of fabric made from basalt fiber yarns using the magnetron sputtering method. In addition, it has not been studied, how the modification of fabric affects its resistance to contact heat and thermophysiological properties.

scholarly journals Evaluation of Thermal Properties of Certain Flame-Retardant Fabrics Modified with a Magnetron Sputtering Method

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Pamela Miśkiewicz ◽  
Magdalena Tokarska ◽  
Iwona Frydrych ◽  
Marcin Makówka
Keyword(s):  
Magnetron Sputtering ◽  
Thermal Comfort ◽  
Flame Retardant ◽  
Heat Radiation ◽  
Contact Heat ◽  
Metal Aluminum ◽  
Thermal Comfort Properties ◽  
Fabric Surface ◽  
Comfort Parameters ◽  
Parameter Values

AbstractThe article presents the modification of flame-retardant fabric surfaces made of basalt, Nomex®, and cotton fabric to improve their selected thermal comfort properties. The modification consisted of depositing on the fabric surface by magnetron sputtering the metal (aluminum) and ceramic (zirconium (IV) oxide) coatings with a thickness of 1 μm and 5 μm. Flame-retardant fabrics have been chosen because of the desire to apply them to gloves intended for the use in hot-work environments. The article presents the results of testing reference samples and their modifications, which were subjected to the test of resistance to contact heat for contact temperatures of 100°C and 250°C, resistance to thermal radiation and examined their selected thermal comfort parameters, i.e., the thermal conductivity coefficient and heat absorption coefficient. Almost the 1st efficiency level for contact heat was reached for basalt fabric coated with zirconium (IV) oxide with a thickness of 5 μm. The 1st level of protection against heat radiation was obtained for all reference and modified samples. Based on the Kruskal–Wallis test, it was noticed that a significant change in parameter values is caused by the modification with 5 μm thick coating.

scholarly journals Modification of Surface of Basalt Fabric on Protecting Against High Temperatures by the Method of Magnetron Sputtering

2019 ◽  
Vol 19 (1) ◽  
pp. 36-43 ◽  
Author(s):  
Pamela Miśkiewicz ◽  
Iwona Frydrych ◽  
Wojciech Pawlak ◽  
Agnieszka Cichocka
Keyword(s):  
Thermal Properties ◽  
Magnetron Sputtering ◽  
Heat Resistance ◽  
High Temperatures ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Specific Substrate ◽  
Chromium Layer ◽  
Contact Heat ◽  
Fabric Surface

Abstract Basalt fibers and fabrics made of these are characterized by excellent thermal and mechanical properties. Therefore, basalt fabrics, due to a good resistance to high temperatures, are frequently applied in the personal protection equipment (PPE). In order to improve their thermal properties and, above all, the contact heat resistance, the process of physical vapor deposition was proposed. The process of Physical Vapor Deposition (PVD) involves producing a coating on a specific substrate as a result of physical deposition of molecules, ions or atoms of the selected chemical compounds. The method selected for the test is the magnetron sputtering. It involves depositing a uniform film of chromium on the surface of the basalt fabric. In order to improve the thermal properties – especially the contact heat resistance, two values of thickness of the chromium layer deposited on the basalt fabric surface were adopted for the test. Covering 1 μm and 5 μm with the chromium layer did not fulfil the expectations and the research will be continued.

Structural, Thermal and Electrical Properties of Doped Poly(3,4 ethylenedioxythiophene)

2016 ◽  
Vol 10 (4) ◽  
pp. 395-400 ◽  
Author(s):  
Deepali Kelkar ◽  
◽  
Ashish Chourasia ◽  
◽  
Keyword(s):  
Crystal Structure ◽  
Electrical Properties ◽  
Xrd Analysis ◽  
Structure Modification ◽  
Camphorsulfonic Acid ◽  
Thermal And Electrical Properties ◽  
Ft Ir

Poly(3,4-ethylenedioxythiophene) (PEDOT) was chemically synthesized, undoped and then re-doped using FeCl3 as well as camphorsulfonic acid (CSA). FT-IR results confirm the nature of the synthesized and doped samples. XRD analysis indicates crystal structure modification after doping and was also used to calculate crystallinity of samples. Crystallinity increases after FeCl3 doping, whereas it reduces due to CSA doping. TGA-DTA results show reduction in Tg value for FeCl3 doped sample while it increases for CSA doped samples compared to that of undoped PEDOT. Reduction in Tg indicates plasticizing effect of FeCl3 whereas increase in Tg show anti-plasticizing effect of CSA in PEDOT. Conductivity value () increases by two orders of magnitude after doping. Log vs. 1/T graph show metallic nature of undoped PEDOT above 308 K, however both doped samples show semiconducting nature from 301 to 383 K.

Effect of electron irradiation on optical, thermal and electrical properties of polymer electrolyte

2019 ◽  
Vol 322 (1) ◽  
pp. 19-27 ◽  
Author(s):  
B. K. Mahantesha ◽  
V. Ravindrachary ◽  
R. Padmakumari ◽  
R. Sahanakumari ◽  
Pratheeka Tegginamata ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Polymer Electrolyte ◽  
Electron Irradiation ◽  
Thermal And Electrical Properties
Sign in / Sign up

Export Citation Format

Share Document