Preparation method of functionalized photocatalyst fibers

A functional and photocatalyst technology, applied in the field of fiber manufacturing, can solve the problems of photocatalytic purification efficiency, photocatalytic performance is difficult to be widely applied, etc., and achieve the effect of industrialization promotion, powerful function and complex process

Active Publication Date: 2015-11-04
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

However, the photocatalyst fiber prepared by this method, its nano-TiO 2 The particles are wrapped inside the fiber, and its photocatalytic purification efficiency is affected
In particular, it should be pointed out that in the above two preparation techniques, the currently used nano-TiO 2 Particles can usually only exhibit photocatalytic properties under ultraviolet radiation with a wavelength less than 387nm (typically, see Yongchun Dong, Zhipeng Bai, Ruihua Liu, Tan Zhu, Decomposition of indoor ammonia with TiO2‐loaded cotton woven fabrics prepared by different textile finishing methods, Atmospheric Environment, 2007, 41:3182‐3192), and in sunlight and currently widely used civil indoor lighting sources, the proportion of ultraviolet light is usually less than 10%, while the proportion of visible light is usually as high as 80% , which makes nano-TiO 2 The photocatalytic performance of particles is difficult to be widely applied

Method used

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  • Preparation method of functionalized photocatalyst fibers

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preparation example Construction

[0013] The preparation method (abbreviation method) of the functionalized photocatalyst fiber of the present invention's design, this method adopts following technology:

[0014] (1) Preparation of functionalized nano-TiO2 powder

[0015] Add 5.0g of ferric chloride and 3.0g of graphene oxide into 1000ml of nano-TiO2 aqueous sol, and stir at high speed for 2h at room temperature, then cool, filter and bake at high temperature to obtain surface-coated iron and graphene. Functionalized nano-TiO2 powder; the specification of the graphene oxide is that the average thickness is 1.5nm, and the average bulk density is 0.68g / m 3 ; The hydrosol requires a wide spectral response type, with an average particle size of 2-3nm;

[0016] (2) Preparation of functionalized PET masterbatch containing nano-TiO2

[0017] Put functionalized nano-TiO2 powder with a mass fraction of 15‐45%, 1.0‐2.0% polyethylene dispersant and 53‐84% PET slices into a high-speed mixer and mix evenly, and then use ...

Embodiment 1

[0026] A functionalized photocatalyst fiber is prepared.

[0027] (1) Preparation of functionalized nano-TiO2 powder

[0028] 5.0g ferric chloride and 3.0g graphene oxide (average thickness: 1.5nm, average bulk density: 0.68g / m 3 ) was added to 1000ml of nano TiO2 hydrosol (average mass content of nano TiO2 particles with an average particle size of 2‐3nm: 2.50%), and stirred at a high speed for 2h at room temperature, then cooled, filtered and baked at 120°C Finally, the functionalized nano-TiO2 powder coated with iron and graphene on the surface is obtained.

[0029] (2) Preparation of functionalized PET masterbatch:

[0030]Put the functionalized nano-TiO2 powder, 1.0% polyethylene dispersant (relative molecular mass 2000)) of mass fraction 15% and 84% PET chip into high-speed mixer and mix uniformly, then use extruder to carry out at 180 ℃ Melt mixing and extrusion, cooling in a water bath, pelletizing with a pelletizer, and finally vacuum drying to obtain functionalize...

Embodiment 2

[0035] A functionalized photocatalyst fiber is prepared.

[0036] (1) Preparation of functionalized nano-TiO2 powder

[0037] Step is identical with embodiment 1.

[0038] (2) Preparation of functionalized PET masterbatch

[0039] The functionalized nano-TiO2 powder of mass fraction 30%, the polyethylene dispersant of 1.5% (relative molecular weight 2000) and the PET chip of 68.5% are put into high-speed mixer and mix evenly, use extruder to carry out melting at 200 ℃ then Mix and extrude, cool in a water bath, pelletize with a pelletizer, and finally dry in a vacuum to obtain functionalized PET masterbatches.

[0040] (3) Spinning of skin-core functionalized photocatalyst fiber

[0041] First, the mass fraction of 35% containing nano-TiO 2 The functionalized PET masterbatch and 65% PET chips were vacuum-dried for 1 hour, and then mixed and melt-spun at 280°C by a twin-screw composite spinning machine with a sheath-core composite spinning assembly, and then passed through ...

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Abstract

The invention discloses a preparation method of functionalized photocatalyst fibers. The preparation method comprises the following steps: (1) preparing functionalized nano TiO2 powder, namely, adding 5.0g of ferric trichloride and 3.0g of graphene oxide into 1000ml of nano TiO2 hydrosol, stirring at room temperature for 2 hours, cooling, filtering and baking to obtain the functionalized nano TiO2 powder; (2) preparing functionalized PET master batch, namely, uniformly mixing 15wt%-45wt% of functionalized nano TiO2 powder, 1.0wt%-2.0wt% of a polyethylene dispersant with relative molecular weight being 2000 and 53wt%-84wt% of PET sections in a high-speed mixer, performing melting extrusion at 180-240 DEG C, and performing water cooling, granulating and vacuum drying to obtain the functionalized PET master batch; and (3) spinning the functionalized photocatalyst fibers, namely, drying 20wt%-50wt% of master batch and 80wt%-50wt% of PET sections in vacuum for 1 hour, performing melt spinning on the dried product combined with skin cores at 280 DEG C, and stretching by 3-3.5 times, thereby obtaining the functionalized photocatalyst fibers.

Description

technical field [0001] The invention relates to fiber manufacturing technology, in particular to a preparation method of functionalized photocatalyst fiber. Background technique [0002] With the gradual improvement of the decoration level of people's living and office spaces in our country, new building and decoration materials are widely used, which has caused widespread indoor air pollution and seriously affected people's health. At present, the main pollutants in indoor air include formaldehyde, ammonia and volatile organic compounds, among which formaldehyde pollution is the most common and prominent, which has the risk of inducing various cancers. In order to effectively control indoor formaldehyde pollution, nano-TiO-based 2 Environmental purification materials for photocatalysts, in which nano-TiO 2 Combining with fibers to prepare air-purifying textiles (made of photocatalyst fibers) has great potential for development. This is because nano TiO 2 It can photocat...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10D01D5/34
Inventor 董永春王鹏李冰陈震雷李英超刘春燕
Owner TIANJIN POLYTECHNIC UNIV
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