Ultrasound and Microwave Aided Natural Dyeing of Nettle Biofibre (Urtica dioica L.) with Madder (Rubia tinctorum L.)

Abstract

The success of suture yarn depends upon its tensile and bending properties. As sutures pass through the tissue, it should possess enough strength to hold the tissue together and should be flexible so as to be knotted. The aim of the present work was to improve the strength of silk suture without affecting its bending properties. Silk sutures were fabricated using a circular braiding machine. Structural variations were made by varying the diameter and by producing core sheath suture yarn. The resulting suture yarn is coated with chitosan – a biopolymer. The mechanical performances of suture materials coated with and without chitosan were studied and compared with commercial suture. It was observed that the suture with a core-sheath structure performed well during tensile and knot testing. The coarser yarns exhibited higher bending rigidity and lower knot strength than the finer suture yarns.

Bio-mordants: a review

“…In another study, madder was used as a natural dye, and green tea was used as a bio-mordant to dye 100% nettle-bast bio-fiber fabric. It is stated that all nettle-dyed fabrics displayed extremely high and marketable wash, dry-rub, alkaline-perspiration, acidic-perspiration, and water-fastness qualities (Yavas et al 2017 ). Win et al ( 2020 ) also used beetroot ( Beta vulgaris ), hin-nu-new ( Amaranthus viridis L.) leaves as natural dyes, and tea leaves ( Camella sinensis ) as a bio-mordant to dye cotton fabrics.…”

High-Performance Natural Dyes for Cellulosic Fibers: Review - part 2

“…All dyed nettle fabrics showed a very high, commercially acceptable, dehydration, alkaline, acidic acid and water stability properties. Generally, the microwave dyeing method has led to a lighter appearance compared to conventional dyeing method [13].…”

Bleaching of Fabrics Produced From Casein Fibers

“…First concepts of MW use for textile finishing processes emerged in the 1970s when cellulosic fabrics were treated with Durable Press finishing agents and healed in a microwave oven [16]. Textile finishing using microwave heating has been reported by several authors [17,18,19,20,21,22,23,24,25,26,27,28]. Microwave heating has proven to be more rapid, uniform and efficient than other heating methods [29].…”