Department of Chemistry, Govt. College University, Faisalabad, 38000, Pakistan.
Department of Applied Chemistry, Govt. College University, Faisalabad, 38000, Pakistan.
Environ Sci Pollut Res Int. 2018 Apr;25(11):11100-11110. doi: 10.1007/s11356-018-1301-2. Epub 2018 Feb 6.
The revival of cultural heritage in a form of natural colorants for textile dyeing is gaining popularity due to their soothing nature and bright shades. The present study was conducted to explore the coloring potential of harmala (Peganum harmala) seeds and to improve color strength of dye using microwave radiations followed by a mordanting process. The results showed that harmala plant seeds could be an excellent source of natural dyes for cotton dyeing if the irradiated acidified methanolic extract (RE, 4 min) is used to dye un-irradiated fabric (NRC) at 85 °C for 45 min using a dye bath of pH 9.0 having salt concentration of 7 g/100 mL. Alum (1%) as pre-mordants and iron (7%) as post-mordants have improved the color strength in chemical mordanting more than other mordants employed. The bio-mordants employed reveal that 10% of acacia as pre-bio-mordants and 7% of acacia as post-bio-mordants are effective amounts to obtain high color strength. Suggested ISO standards for colorfastness illustrate that bio-mordanting has given more excellent rating as compared to chemical mordants. It is concluded that harmala seeds have a great potential to act as a source of natural colorant for cotton dyeing under the influence of microwave radiation.
由于其舒缓的性质和鲜艳的色调，以自然染料形式复兴文化遗产用于纺织品染色越来越受欢迎。本研究旨在探索骆驼蓬（Peganum harmala）种子的着色潜力，并通过微波辐射和媒染处理来提高染料的色牢度。结果表明，如果将酸化的甲醇提取物（RE，4 分钟）辐照后用于在 85°C 下对未辐照的织物（NRC）进行 45 分钟染色，染色浴的 pH 值为 9.0，盐浓度为 7 g/100 mL，则骆驼蓬植物种子可以成为棉花染色的天然染料的极好来源。用 1%的明矾（作为预媒染剂）和 7%的铁（作为后媒染剂）进行化学媒染比其他使用的媒染剂更能提高色牢度。生物媒染剂的使用表明，10%的金合欢作为预生物媒染剂和 7%的金合欢作为后生物媒染剂是获得高色牢度的有效用量。建议的 ISO 色牢度标准表明，与化学媒染剂相比，生物媒染剂具有更高的评级。综上所述，在微波辐射的影响下，骆驼蓬种子具有作为棉织物天然染料来源的巨大潜力。
