Nano-oxide Finishing On Cotton Fabric Wrinkle Effect Study Of The Effect

As the natural fiber, cotton fabrics meet the need of comfortableness and health and are favored by consumers. But some problems come out in the process of use such as low elasticity and easy-creasing, which greatly influence the appearances of fabrics. So it's especially important to perform the anti-crease finish on cotton fabric in order to solve the above issues. At the same time, regular finishing methods can't balance the matter between wrinkle recovery angle and break strength retention.Nano-oxides have many unique characteristics and are already used in fields of anti-bacteria, deodorization, and anti-ultraviolet ray. Thus it can be predicted that nano-oxides will play an active role in the anti-crease finish.This program was on the basis of traditional anti-crease finish. Nano-TiO₂ or nano-SiO₂ was added into the traditional system, which formed the nano-oxide anti-crease finishing liquid with high speed stir. Then it was applied to the anti-crease finish of cotton fabric to research the rule of nano-TiO₂ and nano-SiO₂ affecting the anti-crease finish and the best process of that. The best process of anti-crease finish with nano-TiO₂ was as follows: the concentration of nano-TiO₂ was 0.5g/L, concentration of resin was 100g/L, concentration of magnesium chloride was 10g/L,and the bake condition was 160℃×3min. The best process of anti-crease finish with nano-SiO₂ was as follows: the concentration of nano-SiO₂, resin, and magnesium chloride were 2g/L, 120g/L, and 6g/L respectively and the bake condition was 160℃×2min. Results showed that wrinkle recovery angle and break strength retention of treated fabric with nano-TiO₂ were higher than that of no nano-TiO₂. Thermal analysis indicated that thermal decomposition temperature of the treated fabric was advanced a bit compared with no nano-TiO₂ and the crystal structure had no greater change. The fabric possessed good physic and mechanic performances and wash-enduration. At the same time, color and K/S value of the treated fabric didn't change obviously.The mechanism of that nano-oxides could improve the effects of anti-crease finish was proposed on the basis of the above phenomena. Nano-TiO₂ could catalyze the cross-linking reaction of resin and cellulose, which resulted in higher wrinkle recovery angle. Whereas nano-SiO₂ participated the formation of tiny structure and the flexibility of local segments of fiber enhanced, which increased the elasticity of fibers. The mechanism of strength increase with nano-oxides was that nano-oxides penetrated into amorphous region and formed the network in which nano-oxides were in the centre and crosslinked with cellulose in radiation, which effectively explained the stress-concentration.As a new type of catalyst, nano-oxides have been used in many fields of life. And they will exert significant influences in following areas such as improving anti-crease characteristic of cotton fabric, lowering acetic strength lost of fiber, enhancing wearing properties of fabric.