engleski

The influence of argon plasma pretreatment and natural dyeing to UV protection of woolen fabrics

The advantages of using natural dyes are reflected in the quality of textiles. Characteristic of natural dyes is that they help protect against ultraviolet radiation (increased UPF value), inhibit the growth of pathogenic bacteria, generally have a beneficial effect, are environmentally friendly and have special aesthetic properties. By argon plasma pretreatment of textile material it is possible to obtain the desired properties since the modifications are made only on the surface of the fiber/material without changing its basic properties. In this study, the synergistic effect of the ecological pretreatment of textiles with argon plasma and natural dyes is investigated. Their effectiveness is tested by evaluating the protective properties against ultraviolet radiation of treated and untreated woolen fabrics according to the standard AS/NZS 4399:1996 using a UV/VIS spectrophotometer. The woolen fabrics tested are treated with a natural dye derived from pomegranate bark after being pretreated with a low-pressure argon plasma under defined conditions. To determine the effect of pretreatment on the degree of degradation of the natural dye, the woolen fabrics were dyed without plasma pretreatment and without salt, which plays the role of mordant in the dyeing process. The test results show that the woolen fabrics pretreated with argon plasma and dyed with a natural dye from pomegranate bark without the addition of salts as mordant has the highest UPF.

natural dyes ; argon plasma pretreatment ; UV protection factor ; woolen fabrics

Provedena istraživanja dio su istraživanja koja se provode u okviru bilateralnog HR-SLO projekta Development of biodegradable and antimicrobial cellulose composites from waste material (voditeljice S. Ercegović Ražić i M. Gorjanc, 2020.-2022.) u okviru kojeg se želi dobiti celulozni kompozitni materijal potrebnih svojstava za osobnu primjenu.