Publications by authors named "Majid Tehrani"

The dyeing process of textile materials is inherently intricate, influenced by a myriad of factors, including dye concentration, dyeing time, pH level, temperature, type of dye, fiber composition, mechanical agitation, salt concentration, mordants, fixatives, water quality, dyeing method, and pre-treatment processes. The intricacy of achieving optimal settings during dyeing poses a significant challenge. In response, this study introduces a novel algorithmic approach that integrates response surface methodology (RSM), artificial neural network (ANN), and genetic algorithm (GA) techniques for the precise fine-tuning of concentration, time, pH, and temperature.

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Growing concern about the environmental effects of metal mordants and synthetic dyes is encouraging the use of bio-mordants and natural colorants. Cinnamon bark is a rich source of natural colorants such as cinnamaldehyde and tannins. The main purpose of this research was to study and compare the effect of bio-mordants versus metal mordants in terms of colorimetric parameters and color fastness properties of cinnamon bark on wool fibers.

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Article Synopsis
  • Spent coffee grounds (SCGs) serve as a valuable waste resource, providing natural colorants from flavonoids and anthocyanins for dyeing silk fabrics.
  • Different mordants, including metal salts and natural materials like pinecone and lemon peel, were tested using various mordanting methods (pre-, meta-, and post-mordanting) to assess their effectiveness.
  • Results showed that metal mordants generally produced stronger colors, but using the pre-mordanting method with pinecone offered notable color strength and could effectively replace metal mordants in terms of wash and light fastness.
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