Dyeing and finishing of textile fabrics: a review on the chemical aspects at Donghua University
This review focuses on the chemical aspects of dyeing and finishing of textile fabrics at Donghua University. It provides an overview of the various stages involved in the process, including dyeing, washing, drying, and pressing. The review highlights the importance of using suitable chemicals and processing techniques to ensure the desired color and quality of the finished product. It also discusses the environmental impact of these processes and possible measures to reduce pollution. The review is intended to help students and researchers at Donghua University to better understand the chemical aspects of dyeing and finishing of textile fabrics.
Textile dyeing and finishing are important processes in the textile industry, which involve the application of chemicals to enhance the appearance, feel, and performance of textile fabrics. These processes have been extensively studied at Donghua University, one of the leading institutions in China for textile education and research. In this review, we will explore the chemical aspects of dyeing and finishing at Donghua University, covering the dyes, finishes, and chemical reactions involved.
Dyeing is the process of adding color to textile fabrics using dyes. At Donghua University, researchers have studied various types of dyes, including natural dyes like indigo and synthetic dyes like disperse dyes. The selection of dyes depends on the desired color, the type of fabric being dyed, and the dyeing process used. For example, disperse dyes are commonly used for dyeing polyester fabrics, while reactive dyes are often used for cotton fabrics.
During the dyeing process, the dyes bind to the fibers of the textile fabric through chemical reactions. These reactions can involve covalent bonding, ion exchange, or hydrogen bonding between the dye molecules and the fiber surface. The type of bonding depends on the dye and fabric being used. At Donghua University, researchers have studied these reactions in detail to understand how they affect the colorfastness and washability of the dyed fabrics.
Finishing is the process of applying finishes to textile fabrics to enhance their appearance and performance. Common finishes include smoothening agents, antistatic agents, flame retardants, and water repellents. At Donghua University, researchers have studied the interaction between these finishes and the textile fabrics to understand how they affect the surface properties and performance of the finished fabrics.
For example, smoothening agents are used to reduce the roughness of fabric surfaces, which can improve the feel and appearance of the fabric. Antistatic agents are added to prevent static electricity from building up on the fabric surface, which can cause discomfort or damage to the fabric. Flame retardants are added to protect fabrics from burning in case of a fire. And water repellents are applied to make fabrics water-resistant or waterproof.
In addition to these finishes, Donghua University researchers have also studied the interaction between dyes and finishes to understand how they affect each other’s performance. For example, adding a dye to a fabric before applying a smoothening agent can change the color of the smoothened fabric. Similarly, adding an antistatic agent to a dyed fabric can affect the static electricity properties of the dyed fabric.
In conclusion, Donghua University has conducted extensive research on dyeing and finishing of textile fabrics from chemical aspects. The studies have covered various types of dyes, finishes, and chemical reactions involved in these processes. The findings from these studies have been applied in industries to enhance the quality and performance of textile fabrics worldwide.
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