Preparation method and product of tin dioxide doped hydrosol and application thereof in self-cleaning of cotton fabrics

A tin dioxide, hydrosol technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, water pollutants, etc., can solve the problems of fabrics that are not easy to bond, easy to aggregate, and small particles, etc. To achieve the effect of improving the binding force of nanoparticles and fabrics, increasing electrostatic attraction, and improving stability

Pending Publication Date: 2019-06-21
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, textiles have mostly used nano-titanium dioxide as a photocatalytic material. Titanium dioxide is stable in nature, non-toxic, has the characteristics of small particles, good thermal conductivity, large specific surface area, good dispersion, stable photocatalytic activity, and good photoelectric conversion ability. However, titanium dioxide is not easy to disperse in non-polar substances, and it is easy to aggregate in polar substances. It has poor affinity with organic solvents and is not easy to combine with fabrics.

Method used

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  • Preparation method and product of tin dioxide doped hydrosol and application thereof in self-cleaning of cotton fabrics
  • Preparation method and product of tin dioxide doped hydrosol and application thereof in self-cleaning of cotton fabrics
  • Preparation method and product of tin dioxide doped hydrosol and application thereof in self-cleaning of cotton fabrics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of doped tin dioxide crystals: Weigh an appropriate amount of tin powder 0.36g (0.003mol) and crystalline tin tetrachloride 0.7g (0.002mol), add 60mL of distilled water, stir and add to the stainless steel with Teflon lining In the reaction kettle, bake in an oven at 180°C for 24 hours, after cooling for 5 hours, remove the supernatant, put the lower layer in a centrifuge tube, centrifuge at 10,000 rpm for 5 minutes, take the precipitate, add 8 mL of distilled water, wash once, add 8 mL of ethanol, After washing the precipitate for 3 times, centrifuge at 10000rpm for 5 minutes, dry the precipitate in an oven at 60°C for 30 minutes, place it in a grinding container and grind it to obtain the doped tin dioxide crystal;

[0036] Preparation of doped tin dioxide hydrosol: Weigh 8 mg of 3,4-dihydroxyphenylacetic acid, dissolve it in 50 mL of distilled water, ultrasonicate at 50 KHz, 30 °C for 5 min, stir with a magnetic stirrer at 700 rpm for 10 min, add 0.5 g dop...

Embodiment 2

[0042] Preparation of doped tin dioxide crystals: Weigh an appropriate amount of tin powder 0.36g (0.003mol) and crystalline tin tetrachloride 0.7g (0.002mol), add 60mL of distilled water, stir and add to the stainless steel with Teflon lining In the reaction kettle, bake in an oven at 180°C for 24 hours, after cooling for 5 hours, remove the supernatant, put the lower layer in a centrifuge tube, centrifuge at 10,000 rpm for 5 minutes, take the precipitate, add 8 mL of distilled water, wash once, add 8 mL of ethanol, After the precipitate was washed 3 times, it was centrifuged at 10,000 rpm for 5 minutes, dried in an oven at 60° C. for 30 minutes, and ground in a grinding container to obtain the doped tin dioxide crystal.

[0043] In order to find a better catalyst formula, tin powder and tin tetrachloride in different molar ratios were studied, and their photocatalytic activity was measured, see Figure 5 . It can be seen from the figure that the best degradation rate is the...

Embodiment 3

[0046] Cationic modification of cotton fabric: Weigh 2 grams of cotton fabric, bath ratio 1:30, weigh 3 grams of 3-chloro-2-hydroxypropyltrimethylammonium chloride according to the concentration of 50g / L, and weigh 30g / L Put 0.9 g of L sodium hydroxide into a conical flask. Vibrate for about one hour at 80°C in an oscillating dyeing machine, wash with distilled water, and dry in an oven at 60°C.

[0047] Cotton fabric finishing: add the cationic modified cotton cloth to the modified self-doped tin dioxide hydrosol solution, dipping and rolling twice, the excess rate is 100%, after slight water washing, dry in an oven at 60°C.

[0048] Figure 6 It is the SEM picture of cotton fabric, wherein, (1) original cloth; (2) original cloth; (3) cotton cloth doped with tin dioxide; (4) cotton cloth doped with tin dioxide. It can be seen that the shape of the fiber is a flat ribbon structure with twists and turns, which conforms to the morphology characteristics of cotton fiber. After...

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Abstract

The invention discloses a preparation method and a product of tin dioxide doped hydrosol and application thereof in self-cleaning of cotton fabrics. The preparation method comprises the following steps: weighing tin powder and crystalline tin tetrachloride; adding distilled water for dissolving, stirring and then adding into a stainless steel reaction kettle with a polytetrafluoroethylene lining;baking in an oven at the high temperature of 180 DEG C for 24 h, and cooling for 5 h to remove a supernatant; placing precipitates on the lower layer in a centrifuge tube and centrifuging at the speedof 10000 rpm for 5 min; washing the precipitates once, and adding absolute ethyl alcohol for washing three times; centrifuging for 5 min, taking the precipitates and drying the precipitates in the oven; grinding to obtain tin dioxide doped crystals; weighing 8 mg of 3, 4-dihydroxyphenylacetic acid, dissolving the 3, 4-dihydroxyphenylacetic acid into 50mL of distilled water, carrying out ultrasonic treatment for 5 min, stirring by a magnetic stirrer for 10 min, adding 0.5g of the tin dioxide doped crystals, and stirring for 10 min to obtain tin dioxide doped hydrosol which is used for finishing the cotton fabrics. While the cotton fabrics have remarkable self-cleaning performance, the force of binding of nanoparticles and the fabrics can be increased, and the fastness is improved.

Description

technical field [0001] The invention relates to the field of cotton fabric self-cleaning, in particular to a preparation method and product of doped tin dioxide hydrosol and its application in cotton fabric self-cleaning. Background technique [0002] Tin dioxide is a semiconductor with a band gap energy of 3.6eV. It is insulated at room temperature. Crystal tin dioxide is a square crystal of the tetragonal system. It has a simple structure, low cost and long service life. Tin dioxide is often used in the detection of various trace and low volume fraction gases, and is widely used in sensitive devices, glass electrodes, ceramics, solar cells and other methods. Pure tin dioxide photocatalyst has poor visible light activity due to its forbidden band width of about 3.5eV, and photogenerated electrons-holes are easy to recombine. In order to improve the photocatalytic performance, it is often achieved by doping. An effective method is to use Doping with metal elements or non-me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14C02F1/30C02F101/30
Inventor 祁珍明王矿张成李梦玥王春霞高大伟马志鹏
Owner YANCHENG INST OF TECH
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