Both the conventional one-factor-at-a-time (OFT) optimization, in which one of the factors is varied maintaining the other parameters fixed at constant levels, and the central composite design (CCD) optimization, in which all factors are varied simultaneously, were carried out for silk dyeing with chlorogenic acid. The CCD experiments were designed with the help of Design-Expert 10.0.3 software (trial version) and used for evaluating the interactive effects of the four most important operating variables namely pH, temperature, time and dye concentration. The colour characteristics, fastness properties, FT-IR spectra and antioxidant activity of dyed fabrics were also evaluated. The silk fabrics dyed with chlorogenic acid displayed light yellowish brown colour, and exhibited good fastness properties and excellent antioxidant activity.

中文翻译：

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带有绿原酸的彩色抗氧化剂丝：通过中央复合设计进行工艺开发和优化

传统的一次一因素优化（OFT）（其中一个因素被改变，将其他参数固定在恒定水平）和中央复合设计（CCD）优化（其中所有因素都被改变）同时，进行了绿原酸的真丝染色。CCD实验是在Design-Expert 10.0.3软件（试用版）的帮助下进行设计的，并用于评估四个最重要的操作变量（pH，温度，时间和染料浓度）的交互作用。还评估了染色织物的颜色特性，色牢度，FT-IR光谱和抗氧化活性。用绿原酸染色的丝织物显示出浅黄褐色，并显示出良好的坚牢度性能和出色的抗氧化活性。