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首页> 外文期刊>International Journal of Engineering Research and Applications >Optimizing the Dyeing Process of Alkali-Treated Polyester Fabric with Dolu Natural Dye
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Optimizing the Dyeing Process of Alkali-Treated Polyester Fabric with Dolu Natural Dye

机译：用Dolu天然染料优化碱处理涤纶织物的染色工艺

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An attempt has been made to optimize the process of dyeing polyester (PET) fabric with natural dyes. Polyester has been first treated with NaOH solution in order to study its impact on the dyeability to the natural dye. The required and used colour component was extracted from a natural plant, namely: Rhubarb; Rheum officinale. The chemical structure of the used colouring matter is observed to have all the characteristics of a typical disperse dye. The colour strength of PET fabric was noticed to increase as a result of alkali treatment which may be attributed to the alteration in the hydrophobicity of polyester fibre. The most effective parameters that may affect the dye uptake of the natural dye on alkali-treated PET fabric and the final dyeing properties including dye bath pH, dyeing temperature and time were studied in details. The behaviour of the selected and used natural dye was found to be similar to that of disperse dyes. Addition of salicylic acid to the dye bath accelerated the rate of dyeing and subsequently higher colour strength was attained. Non- ionic dispersing agent was also used to ensure better dyeing uniformity and higher dispersion stability of dye liquor. It is obvious from this study that natural dyes can produce bright colour hues and colour fastness properties equivalent to those of synthetic disperse dyes. Thus, natural dyes may be considered as an eco- friendly alternative to the synthetic ones.
机译：已经尝试优化用天然染料将聚酯（PET）织物染色的工艺。为了研究聚酯对天然染料的可染性的影响，首先对聚酯进行了NaOH溶液处理。所需和使用的颜色成分是从天然植物中提取的，即：大黄;大黄药材。观察到所用着色剂的化学结构具有典型分散染料的所有特征。注意到由于碱处理的结果，PET织物的色强度增加，这可能归因于聚酯纤维疏水性的改变。详细研究了可能会影响天然染料在碱处理的PET织物上的染料吸收率的最有效参数，以及最终的染色性能，包括染浴pH，染色温度和时间。发现所选择和使用的天然染料的行为与分散染料的行为相似。在染料浴中加入水杨酸可加快染色速度，并随后获得更高的色强度。还使用非离子型分散剂以确保更好的染色均匀性和更高的分散稳定性。从这项研究中可以明显看出，天然染料可以产生与合成分散染料相同的明亮色相和色牢度特性。因此，天然染料可被视为合成染料的环保替代品。

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