Abstract

Mentha piperita is a hybrid mint, a crossbreed between watermint and spearmint. Indigenous to Europe and the Middle East, the plant is now widely spread and cultivated in many regions of the world. It is occasionally found in the wild with its parent species. This study has been undertaken to apply Mentha piperita bio extract on woven cotton textiles for antibacterial finish. With a view to understand the effect of various functional groups present in the herb, molecular characterisation was done using FTIR. Chemical groups responsible for antibacterial behaviour and the chemical structure of this plant were investigated through GCMS. Mentha piperita treated fabric has greater colour depth (K/S) in comparison to original fabric and it increases with increase in concentration. The mordanted fabrics were immersed in the 25%, 50%, 75% and 100% concentration of ethanolic extracted Mentha piperita for five minutes and padded individually in the presence of citric acid. The fabric was then dried at 80 °C for 3 min and cured at 110 °C for 2 min.The fabrics were evaluated for antibacterial activity against gram negative bacteria (Escherichia.coli) and gram positive bacteria (Staphylococcus aureus) by Agar Well Diffusion method. Zone of inhibition of 7 mm to 21 mm was measured for the different treated fabrics against gram negative bacteria (Escherichia.coli) when compared with 5 mm to 18 mm for gram positive bacteria (Staphylococcus aureus).Zone of inhibition in treated fabrics reveal that the antibacterial effect is more potent against gram negative bacteria. There is zone of inhibition for both gram negative and gram positive bacteria after 20 washing cycles. However, Mentha piperita treated fabric can retain 42.8–71.4% of its initial antibacterial property even after 20 washing cycles. Cotton fabrics also generate fragrance after treatment. Fragrance intensity ratings of 200 respondents have been documented and evaluated.

摘要

Mentha piperita是一种混合薄荷，是水薄荷和留兰香之间的杂交品种。该植物原产于欧洲和中东，现在在世界许多地区广泛传播和种植。它偶尔会与其亲本一起在野外发现。本研究旨在将胡椒薄荷生物提取物应用于机织棉纺织品以进行抗菌整理。为了了解草药中存在的各种官能团的影响，使用 FTIR 进行了分子表征。通过 GCMS 研究了负责抗菌行为的化学基团和该植物的化学结构。薄荷与原始织物相比，经过处理的织物具有更大的色深 (K/S)，并且随着浓度的增加而增加。将媒染织物浸入浓度为 25%、50%、75% 和 100% 的乙醇提取的胡椒薄荷中 5 分钟，并在柠檬酸存在下单独填充。然后将织物在 80°C 下干燥 3 分钟并在 110°C 下固化 2 分钟。通过琼脂井扩散法评估织物对革兰氏阴性菌（大肠杆菌）和革兰氏阳性菌（金黄色葡萄球菌）的抗菌活性方法。测量了不同处理过的织物对革兰氏阴性菌 ( Escherichia.coli) 相比之下，革兰氏阳性菌（金黄色葡萄球菌）为 5 毫米至 18 毫米。处理过的织物中的抑菌圈表明抗菌作用对革兰氏阴性菌更有效。经过 20 次洗涤循环后，革兰氏阴性菌和革兰氏阳性菌均存在抑菌圈。然而，经过胡椒薄荷处理的织物即使在 20 次洗涤循环后仍能保留其初始抗菌性能的 42.8-71.4%。棉织物在处理后也会产生香味。已记录和评估了 200 名受访者的香味强度等级。