The influence of the capacitive coupled radio-frequency discharge on cotton fiber and technological effects of its application

Abstract

The authors studied the effect of capacitively coupled radio-frequency (RF) discharge at low pressure on cotton fiber. It is shown that non-cellulose impurities of cotton fiber are removed during processing: the content of extracted substances is reduced by 22-70% depending on the type of solvent when using air, by 5-6% – when using argon. The surface of the fibers becomes hydrophilic, additional submicroscopic pores appear, the roughness increases 1.6 times, water absorption increases 1,5-1,8 times. Discontinuous knitted fabric dyeing was carried out varying the concentration of the active dyes (remasol) in the dye-bath. It was found that the sorption capacity of cotton fibers in relation to the dye increases on average 1.1-1.25 times. To achieve the required color intensity of plasma pre-treated samples dye concentration on average 10-30% less than in the controlled dyeing is needed. The concentrations of dyes that allow obtaining the same intensity of color for the knitted fabric prepared in different ways are selected.

Study of the Soiled Places and Effects of the Harmful Factors Topography on the Special Clothing for Chemical Enterprises Workers

“…Zippers should be hidden or covered with strips of textile fabric from the inside and outside. The fabrics and design of protective clothing need to meet the requirements of ergonomics, reduce the effect of heat stress on the well-being and performance of workers (thermal, hygroscopic properties, air permeability of fabrics), provide freedom and convenience of movement (stiffness, drape ability of fabrics) (Ziyatdinova et al, 2019;Havenith et al, 2011;Sung et al, 2015;Van Wely, 2017;Hajibekova, Tagirova, 2015;Solodov, Ziganshina, 2015;Borodaev, Azanova, Zheltukhin, Abutalipova, Khisamiyeva, 2019).…”

Plasma modification physical and mechanical properties of nonwoven materials of medical masks

“…One of the methods for sterilization and disinfection of medical devices made of nonwoven materials is plasma treatment, which, unlike most other methods, allows you to maintain the filtering efficiency of masks, which has recently been reported in more and more publications in the scientific and technical literature [3][4][5][6], works on the use of plasma treatment to improve the characteristics of nonwoven materials for medical devices [7,8]. In general, it should be noted that plasma treatment is effectively used to modify a wide range of textile materials [9][10][11]. This article discusses the effect of high-frequency capacitive discharge plasma flow at reduced pressure (as a potential sterilization tool) on the main physical and mechanical characteristics of a medical mask based on nonwoven materials and its components separately.…”