The colour of denim fabric, which has a large share in the textile market, is an important parameter together with comfort properties during usage. While some users prefer the colour of denim fabrics to have different colours as they use them, others want to be provided with colour stability of the fabrics during use. In this study, the effect of a sol‐gel technique on indigo dyed denim fabrics was investigated. The aim was to reduce the colour change that occurs in denim fabrics as a result of external factors by using silica‐based coatings. The sols were prepared by using TEOS (tetraethylortosilicate) and different volumes of GPTS ((3‐glycidyloxypropyl)trimethoxysilane) as precursors in acidic and alkaline conditions. Synthetic indigo dyed cotton denim fabrics were treated with the sols by applying the pad‐dry‐cure method. It was determined that the colour strength of the treated samples increased and the fabrics treated with the sols prepared in alkaline condition became darker compared to the sols in acidic condition. It is seen that the use of crosslinkers while preparing the sol could improve the rubbing and washing fastness of commercial denim samples.

中文翻译：

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二氧化硅溶胶对靛蓝染色牛仔布的光学性能和色牢度的影响

在纺织品市场上占有很大份额的牛仔布的颜色，以及使用过程中的舒适性是一个重要的参数。虽然一些用户希望牛仔布的颜色在使用时具有不同的颜色，但其他用户希望在使用过程中提供织物的颜色稳定性。在这项研究中，研究了溶胶-凝胶技术对靛蓝染色牛仔布的影响。目的是通过使用基于二氧化硅的涂料来减少由于外部因素而在牛仔布中出现的颜色变化。溶胶是通过在酸性和碱性条件下使用TEOS（原硅酸四乙酯）和不同体积的GPTS（（3-缩水甘油基氧丙基）三甲氧基硅烷）作为前体制备的。合成靛蓝染色的棉牛仔布织物通过采用垫干固化方法进行了溶胶处理。已确定，与酸性条件下的溶胶相比，经处理的样品的色强度增加并且用在碱性条件下制备的溶胶处理的织物变得更深。可以看出，在制备溶胶时使用交联剂可以改善商业牛仔布样品的摩擦牢度和耐洗牢度。