Textile

CD can be used to prepare blended fibers for textile purposes. After CDs form polymer-CD inclusion compounds with specific polymers, they are washed with an organic solvent or treated with amylase. The inclusion system is destroyed and the CD molecules are removed. At this time, guest molecules gather together to form new polymers with different morphologies and structures from ordinary blends, whose melting, crystallization, decomposition and glass transition temperatures are higher than those of ordinary blends. They can be used to further prepare high-performance blend fibers ^[1].

CD can participate in fabric pretreatment by forming inclusion compounds with surfactants. For example, CD-fatty alcohol polyoxyethylene ether (AEO)-inclusion compounds were used for scouring cotton fabrics and wool fabrics, exhibiting more efficiency than another surfactant alkyl phenyl polyoxyethylene ether ^[2]. (Scouring is a preparatory treatment of a textile to remove soluble and insoluble impurities from the textile.)

In addition, the enzymatic method can also be used to remove impurities from fabrics due to its various advantages such as low reaction temperature, low energy consumption, and low environmental pollution. However, the presence of surfactants may inhibit the enzyme. Adding a certain amount of CD before enzyme treatment can form inclusion compounds with surfactants to inactivate the surfactants, thus improving the utilization rate of enzymes and more conducive to the pre-treatment of fabrics ^[3].

CD can be used in textile printing, which is the process of applying a print paste to fabric in definite patterns or designs. Adding CD to print paste improves the stability and compatibility of dyes, reduces discoloration of patterns on fabric during the evaporation process, and prevents staining of the white ground when the fabric is washed.

Cationic blue X-GRRL is one of the commonly used dyes for dyeing and printing acrylic fibers, but the dye is easy to shade changes during use. The addition of β-CD during the printing process kept the shade stable. CD oligomers were studied as print pastes for polyester-cotton fabrics (reactive/disperse dyeing) or nylon printing, showing good performance ^[4].

Textile finishing refers to the processing used to improve the look, performance or "hand feel" of the finished textile of the fabric after printing and dyeing, that is, any process performed after dyeing to enhance or give the fabric a certain function. As an environmentally friendly auxiliary, CD has been widely used in textile finishing due to its unique properties.

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