Preparation method of modified nano titanium dioxide finishing agent with uvioresistant and self-cleaning double effects

Abstract

The invention relates to a finishing method of rutile type nano titanium dioxide with ultraviolet absorption and self-cleaning performance for polyester-cotton fabric. An organic silane coupling agent (KH560) is utilized to carry out surface modification onto rutile type nano TiO2 through main two steps: (1), adding the rutile type nano titanium dioxide powder into alcohol to prepare alcohol liquor with mass concentration of 1%-5%, treating for a certain time by adopting ultrasonic or mechanical stirring or microwave-ultrasonic homogenizing, so that the nano titanium dioxide powder is uniformly dispersed in the alcohol; (2), adding a coupling agent which accounts for 1%-5% of the titanium dioxide into the alcohol liquor, regulating pH to neutral, stirring uniformly, reacting for 1 hour-3 hours at the constant temperature of 70 DEG C-90 DEG C to obtain the modified nano titanium dioxide finishing liquor. The modified nano TiO2 finishes the polyester-cotton fabric, the finished and dyed fabric is placed under an ultraviolet lamp with special ultraviolet wavelength for being irradiated for a certain time, and the finished fabric is measured to have uvioresistant and self-cleaning performances. The preparation method disclosed by the invention is simple and strong in operation practicability; the fabric can obtain the uvioresistant and self-cleaning performances at the same time; moreover, the nano titanium dioxide has protective effect for strength loss of the fabric.

Description

technical field

[0001] The invention relates to a finishing method with rutile nano-titanium dioxide applied to polyester-cotton fabrics, which has the effect of anti-ultraviolet and self-cleaning, and belongs to the field of material science. Background technique

[0002] Titanium dioxide has good chemical stability, high catalytic activity, cheap and easy to obtain, non-toxic and excellent semiconductor properties, and has broad application prospects in energy and environment. The crystalline phase of titanium dioxide mainly includes anatase, brookite, rutile and titanium dioxide B. The rutile type is the most stable crystal form in titanium dioxide. It has a dense structure and has higher hardness, density, and density compared with anatase. Thermal conductivity, dielectric constant and refractive index, with high UV shielding and weather resistance. Nano-titanium dioxide has small particle size, large specific surface area, strong magnetism, photocatalysis, good absorpti...

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