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Method for preparing polymer sheet with photocatalytic function on basis of 3D molding technology

A technology of polymer sheets and photocatalysis, applied in 3D object support structures, additive manufacturing, processing and manufacturing, etc., can solve the problems of high cost and complicated preparation process, and achieve controllable shape, simple preparation process and high catalytic efficiency Effect

Inactive Publication Date: 2019-05-31
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is complex, the cost is high, and there are obvious technical differences from the patent of the present invention
Therefore, the existing methods of preparing materials using 3D printing technology need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a photocatalytic functional polymer sheet based on 3D molding technology, comprising the following steps:

[0032] (1) Cryogenically crush the nylon polymer pellets, carry out vibrating sieve classification treatment (the particle size of the powder is 50 μm), select nylon polymer powders with different particle sizes, add 2% antioxidant and mix them evenly, and carry out crystallization deal with. The crystallization treatment process is to keep warm for 6 hours under the protection of an atmosphere at 80°C, and then cool with the furnace;

[0033] (2) Disperse the obtained nylon polymer powder in sulfuric acid solution and stir for 5 hours, the concentration is 50g / L, wash with water to neutral after etching, soak in tetraethyl orthosilicate for 10min at 60°C, wash and dry in water;

[0034] (3) Deposit the photocatalytic medium TiO on the surface of the etched nylon polymer powder by co-precipitation method 2 , dried under the protection of t...

Embodiment 2

[0038] A method for preparing a photocatalytic functional polymer sheet based on 3D molding technology, comprising the following steps:

[0039] (1) Cryogenically crush the polypropylene polymer pellets, and carry out cyclone classification treatment (the particle size of the powder is 80 μm), select polypropylene polymer powders with different particle sizes, add 0.5% antioxidant and mix them evenly, and carry out Crystallization treatment. The crystallization treatment process is to keep warm for 1 hour under the protection of atmosphere at 200°C, and then cool with the furnace.

[0040] (2) Disperse the obtained polypropylene polymer powder in hydrochloric acid solution and stir for 0.1 hour, the concentration is 200g / L, wash with water to neutral after etching, soak in tetraethyl orthosilicate for 10min at 60°C, wash with water and dry .

[0041] (3) Deposit the photocatalytic medium ZnO on the surface of the etched polypropylene polymer powder by co-precipitation method...

Embodiment 3

[0045] A method for preparing a photocatalytic functional polymer sheet based on 3D molding technology, comprising the following steps:

[0046] (1) Cryogenically crush the polyethylene polymer pellets, carry out vibrating sieve classification treatment (the particle size of the powder is 60 μm), select nylon polymer powders with different particle sizes, add 1.8% antioxidant and mix them evenly, and carry out crystallization processing. The crystallization treatment process is to keep the temperature for 4.5 hours under the protection of an atmosphere at 100°C, and then cool with the furnace.

[0047] (2) Disperse the obtained polyethylene polymer powder in nitric acid solution and stir for 4 hours, the concentration is 80g / L, wash with water until neutral after etching, soak in tetraethyl orthosilicate for 10min at 60°C, wash with water and dry .

[0048] (3) Deposit the photocatalytic medium SnO on the surface of the etched polyethylene polymer powder by co-precipitation ...

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Abstract

The invention discloses a method for preparing a polymer sheet with a photocatalytic function on the basis of a 3D molding technology. The method comprises the following steps that (1), cryogenic crushing is conducted on polymer granules, grading treatment is conducted, polymer powder with the particle size of 50-80 micrometers is selected, 0.5%-2% of an antioxidant is added, uniform mixing is conducted, and crystallization treatment is conducted; (2), the polymer powder obtained in the step (1) is dispersed into an acid solution, stirring is conducted for 0.1-5 hours, the concentration is 0.1-200 g / L, the polymer powder is washed to be neutral after being etched and soaked in tetraethyl orthosilicate for 10 min at 60 DEG C, and washing and drying are conducted; (3), a photocatalytic medium is deposited on the surface of the polymer powder obtained in the step (2) by adopting a coprecipitation method, drying is conducted under atmosphere protection at the temperature of 80-200 DEG C, and 0.5%-1.5% of a flow aid is added and mixed uniformly; and (4), the sheet with the photocatalytic function is prepared from the polymer powder obtained in the step (3) by adopting a selective lasersintering technology, the laser power ranges from 3 W to 30 W, the sintering temperature ranges from 100 DEG C to 190 DEG C, and drying is conducted after ultrasonic cleaning is conducted through an ethanol solution.

Description

technical field [0001] The invention relates to the fields of electroless plating and composite material preparation, in particular to a method for preparing a polymer sheet with photocatalytic function based on 3D molding technology. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. [0003] Photocatalytic materials include titanium dioxide, zinc oxide, tin oxide, iron oxide, zirconium dioxide, cadmium sulfide and other oxide sulfide semiconductors, but zinc oxide and cadmium sulfide are unstable, and titanium dioxide photocatalysts have low quantum efficiency and can only absorb ultraviolet rays. Light, low utilization rate of solar energy, CuO 2 Light energy utilization rate is low. Therefore, improvements are needed to obtain materials more suitable for photocatalysis. [00...

Claims

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Application Information

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IPC IPC(8): B29B9/12B29B9/16B29C64/314B29C64/153B33Y40/00B33Y10/00
Inventor 黄俊俊陈芮王静袁慢慢伍凯明张立伟
Owner HEFEI UNIV