Modification of the Hygroscopic Properties of Textile Materials Containing Polyurethane Threads

2021 ◽  
Vol 899 ◽  
pp. 269-274
Author(s):  
Albina A. Azanova ◽  
Ludmila N. Abutalipova ◽  
Lyutziya G. Khisamiyeva
Keyword(s):  
Water Absorption ◽  
Plasma Treatment ◽  
High Frequency ◽  
Capillary Rise ◽  
Plasma Modification ◽  
Cotton Fibers ◽  
Knitted Fabrics ◽  
Reduced Pressure ◽  
Textile Materials ◽  
Hygroscopic Properties

The article discusses the influence of the presence of polyurethane (elastomeric) threads in the composition of a textile material on the effect of plasma modification of hygroscopic properties. The objects of the study were textile (knitted) fabrics based on cotton fibers with the addition of Dorlastan threads. The samples were processed in the plasma of a high-frequency capacitive discharge at a reduced pressure, as the plasma-forming gas was used air. Experiments have shown that the water absorption of the samples after plasma treatment is increased by an average of 1.5 times. The presence of Dorlastan thread does not significantly affect the result of the plasma modification, since the samples are completely immersed in water and the elastomeric threads do not limit the water absorption of its cotton component. The degree of capillary rise, on the contrary, depends on the presence of polyurethane threads. In samples made of 100% cotton, the increase occurs up to 190-. According to these samples, polyurethane threads prevent the capillarity of water by about 4 times. Kinetic curves of water absorption are given. The results suggest that other processing treatments are required to render the polyurethane threads hydrophilicity by plasma treatment. This should be considered in the development of plasma methods for treating textile materials, including in terms of matrix for composite materials.

scholarly journals Electrical Resistance of Stainless Steel/Polyester Blended Knitted Fabrics for Application to Measure Sweat Quantity

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1015
Author(s):  
Qing Chen ◽  
Lin Shu ◽  
Bailu Fu ◽  
Rong Zheng ◽  
Jintu Fan
Keyword(s):  
Stainless Steel ◽  
Heat Flow ◽  
Water Absorption ◽  
Electrical Resistance ◽  
Sweat Rate ◽  
Skin Surface ◽  
Knitted Fabrics ◽  
Absorption Ratio ◽  
Skin Wetness ◽  
Hydrophilic Treatment

Skin wetness and body water loss are important indexes to reflect the heat strain of the human body. According to ISO 7933 2004, the skin wetness and sweat rate are calculated by the evaporative heat flow and the maximum evaporative heat flow in the skin surface, etc. This work proposes the soft textile-based sensor, which was knitted by stainless steel/polyester blended yarn on the flat knitting machine. It investigated the relationship between electrical resistance in the weft/warp directions and different water absorption ratio (0–70%), different sample size (2 cm × 2 cm, 2 cm × 4 cm, 2 cm × 6 cm and 2 cm × 8 cm). The hydrophilic treatment effectively improved the water absorption ratio increasing from 40% to 70%. The weft and warp direction exhibited different electrical behaviors when under dry and wet conditions. It suggested the weft direction of knitted fabrics was recommended for detecting the electrical resistance due to its stable sensitivity and linearity performance. It could be used as a flexible sensor integrated into a garment for measuring the skin wetness and sweat rate in the future instead of traditional measurements.

The Effect of Inner Layer Fiber Diameter and Fabric Structure on Transplanar Water Absorption and Transfer of Double-layered Knitted Fabrics

2021 ◽  
Vol 22 (2) ◽  
pp. 578-586
Author(s):  
Bahareh Yousefi ◽  
S. Mohammad Hosseini Varkiani ◽  
Siamak Saharkhiz ◽  
Zahra Khorram Toussi
Keyword(s):  
Water Absorption ◽  
Fiber Diameter ◽  
Knitted Fabrics ◽  
Fabric Structure ◽  
Layer Fiber

Influence of Oxygen Plasma Modification Carbon Fiber on Flexural Strength and Hydrothermal Properties of CF/PES Composite

2014 ◽  
Vol 926-930 ◽  
pp. 141-144
Author(s):  
Xu Cui ◽  
Yan Jiao Huang ◽  
Yu Gao ◽  
Shuo Wang
Keyword(s):  
Composite Material ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Retention Rate ◽  
Test Method ◽  
Plasma Modification ◽  
Resin Matrix ◽  
Strength Retention

In this paper, low temperature oxygen plasma treatment method was adopted to process the carbon fiber surface. Flexural Strength test method was utilized to represent f composite material flexural strength. This paper observed flexural failure morphology of composite material by aid of SEM, then it compared the mechanical property, hygroscopicitiy and flexural strength retention rate of composite material before and after the plasma treatment. Results showed that the optimum treatment conditions of carbon fiber were 300W treatment power and 15-minute treatment time. Under the condition, the highest flexural strength value be increased by 19.55%.Saturated bibulous is low and bibulous rate is slow, flexural strength retention rate is 94.9%. And at the same time PES-C resin matrix can be strengthened, which will further improve the mechanical properties of composite materials.

scholarly journals Tip-Cylinder Electrode Plasma to Enhance the Coating of Conductive Yarn Process

2020 ◽  
Vol 14 (2) ◽  
pp. 213
Author(s):  
Valentinus Galih Vidia Putra ◽  
Lutfi Zulfikar ◽  
Atin Sumihartanti ◽  
Juliany Ningsih Mohamad ◽  
Yusril Yusuf
Keyword(s):  
Electrical Conductivity ◽  
Plasma Treatment ◽  
Plasma Generator ◽  
Textile Yarn ◽  
Textile Materials ◽  
Conductive Yarns ◽  
Coating Method ◽  
Pre Treatment ◽  
Conductive Textile ◽  
Conductive Yarn

This study aims to develop conductive textile materials using a polyester textile yarn by applying a knife coating method and pre-treatment of a tip-cylinder plasma electrode. In this research, carbon ink was coated on polyester staple yarn which was given a pre-treatment with a plasma generator and coated with the knife coating method. The electrical conductivity of conductive yarns produced from this study was divided into two types, as yarns without plasma treatment and with plasma treatment with a ratio of water and carbon ink concentrations of 1:1 and 2:1. The results of the electrical conductivity with plasma treatment and the concentration of carbon ink and water of 1:1 and 1:2 were 69005 (Ωm)-1 and 50144.25 (Ωm)-1, respectively, while the results of the electrical conductivity for threads with concentrations of carbon ink and water of 1:1 and 1:2 without plasma treatment were 18197.64 (Ωm)­‑1  and 8873.54 (Ωm)-1, respectively. The results showed that the concentration of carbon ink and water and plasma treatment affected the conductive value of the yarn. The results also showed that the presence of plasma pre-treatment improved the coating process of conductive ink on the yarn.Keywords: carbon ink; conductive yarn; plasma; textile A B S T R A KPenelitian ini bertujuan untuk mengembangkan bahan tekstil konduktif menggunakan benang tekstil poliester dengan mengaplikasikan metode knife coating dan pre-treatment plasma elektroda tip-cylinder. Pada penelitian ini dilakukan pelapisan dengan tinta karbon pada benang poliester stapel yang diberi perlakuan awal dengan plasma generator dan dilapisi dengan metode pelapisan knife coating. Konduktivitas listrik benang konduktif yang dihasilkan dari penelitian ini dibagi menjadi dua jenis, yaitu benang tanpa perlakuan plasma dan dengan perlakuan plasma dengan perbandingan konsentrasi air dan tinta karbon sebesar 1:1 dan 2:1. Hasil konduktivitas listrik dengan perlakuan plasma dan konsentrasi tinta karbon dan air sebesar 1:1 dan 1:2 masing-masing adalah 69005 (Ωm)‑1 dan 50144,25 (Ωm)-1, sedangkan hasil konduktivitas listrik untuk benang dengan konsentrasi tinta karbon dan air sebesar 1:1 dan 1:2 tanpa perlakuan plasma masing-masing adalah 18197,64 (Ωm)-1 dan 8873,54 (Ωm)-1. Hasil penelitian menunjukkan bahwa konsentrasi tinta karbon dan air serta perlakuan plasma berpengaruh terhadap nilai konduktivitas benang serta adanya pre-treatment plasma dapat meningkatkan proses coating tinta konduktif pada benang.Kata kunci: benang konduktif; plasma; tekstil; tinta karbon 

scholarly journals Plasma Treatment of Particles in a Fluidized Bed under Reduced Pressure.

1994 ◽  
Vol 20 (1) ◽  
pp. 21-25 ◽  
Author(s):  
Katsuji Noda ◽  
Shigeo Uchida ◽  
Shinji Nakamura ◽  
Shinji Iwamoto ◽  
Akinori Maesawa ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Fluidized Bed ◽  
Reduced Pressure

Development of high-insulating materials with aerogel for protective clothing applications – an overview

2021 ◽  
Vol 112 (2) ◽  
pp. 164-172
Author(s):  
Agnieszka Greszta ◽  
Sylwia Krzemińska ◽  
Grażyna Bartkowiak ◽  
Anna Dąbrowska
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Protective Clothing ◽  
State Of The Art ◽  
Knitted Fabrics ◽  
Insulating Materials ◽  
Textile Materials ◽  
Wide Range ◽  
Properties Of Materials ◽  
Hot Environments

Abstract Aerogels are ultra-light solids with extremely low thermal conductivity (even lower than air), thanks to which they have a huge potential in a wide range of applications. The purpose of this publication is to present the state-of-the art knowledge of the possibility of using aerogels to increase the thermal insulation properties of clothing materials intended for use in both cold and hot environments. Various methods of aerogels application to textile materials (non-woven, woven and knitted fabrics) are discussed, indicating their advantages and limitations. Numerous research studies confirm that aerogels significantly improve the thermal insulation properties of materials, but due to their delicate and brittle structure and their tendency to dusting, their application still poses considerable problems.

Influence of sublimation process on air permeability and water absorption dynamics

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Brigita Kalendraite ◽  
Jolita Krisciunaite ◽  
Daiva Mikucioniene
Keyword(s):  
Water Absorption ◽  
Design Methodology ◽  
Air Permeability ◽  
Knitted Fabrics ◽  
Content Type ◽  
Sublimation Process ◽  
Textile Fabrics ◽  
High Temperature And Pressure ◽  
Before And After ◽  
Temperature And Pressure

PurposeThe purpose of this research was to find the influence of sublimation process on air permeability and water absorption dynamics of knitted and woven polyester-based fabrics.Design/methodology/approachThree different sublimation designs were prepared and applied (keeping the same sublimation parameters) for eight variants of knitted and four variants of woven polyester-based fabrics. Air permeability and water absorption dynamics during 180s period was measured and compared before and after the sublimation process.FindingsAccording to the obtained results, high temperature and pressure applied in sublimation process have influence on the porosity and air permeability of knitted fabrics; however, the influence on water absorption dynamics is minimal. Sublimation design dos not have any influence on the mentioned properties.Originality/valueThe obtained results of the sublimation process influence on air permeability and water absorption dynamics of knitted and woven polyester-based fabrics will help to understand how sublimation process can affect comfort properties of textile fabrics.

scholarly journals Biomaterial Embedding Process for Ceramic–Polymer Microfluidic Sensors

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1745 ◽  
Author(s):  
Witold Nawrot ◽  
Karol Malecha
Keyword(s):  
Plasma Treatment ◽  
Anodic Bonding ◽  
Plasma Modification ◽  
Biochemical Processes ◽  
Angle Measurements ◽  
Plasma Activation ◽  
Microfluidic Sensors ◽  
Contact Angle Measurements ◽  
Novel Method ◽  
Sample Structure

One of the major issues in microfluidic biosensors is biolayer deposition. Typical manufacturing processes, such as firing of ceramics and anodic bonding of silicon and glass, involve exposure to high temperatures, which any biomaterial is very vulnerable to. Therefore, current methods are based on deposition from liquid, for example, chemical bath deposition (CBD) and electrodeposition (ED). However, such approaches are not suitable for many biomaterials. This problem was partially resolved by introduction of ceramic–polymer bonding using plasma treatment. This method introduces an approximately 15-min-long window for biomodification between plasma activation and sealing the system with a polymer cap. Unfortunately, some biochemical processes are rather slow, and this time is not sufficient for the proper attachment of a biomaterial to the surface. Therefore, a novel method, based on plasma activation after biomodification, is introduced. Crucially, the discharge occurs selectively; otherwise, it would etch the biomaterial. Difficulties in manufacturing ceramic biosensors could be overcome by selective surface modification using plasma treatment and bonding to polymer. The area of plasma modification was investigated through contact-angle measurements and Fourier-transform infrared (FTIR) analyses. A sample structure was manufactured in order to prove the concept. The results show that the method is viable.

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