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Multifunctional film material and preparation method and application thereof

A thin-film material and multi-functional technology, applied in separation methods, chemical instruments and methods, membranes, etc., can solve problems such as inability to separate metal ions, achieve improved flux recovery rate, improved hydrophilicity, and excellent chemical resistance Effect

Active Publication Date: 2020-09-29
台州恒光反光材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In membrane separation technology, traditional gravity-driven oil-water separation membranes can only separate emulsions or immiscible oil-water mixtures, but cannot separate metal ions dissolved in solution.

Method used

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  • Multifunctional film material and preparation method and application thereof
  • Multifunctional film material and preparation method and application thereof
  • Multifunctional film material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The preparation method of multifunctional thin film material comprises:

[0035] Provide the casting solution obtained by intermittent ultrasonic treatment, the above-mentioned casting solution includes the wetting solution of the catalytic degradation material, the above-mentioned catalytic degradation material is graphene oxide and titanium dioxide; the lateral dimension of the above-mentioned graphene oxide is not more than 3 μm, and the above-mentioned titanium dioxide is anatase Mineral type, particle size is 5-50nm;

[0036] The above-mentioned casting solution is formed in a coagulation bath in the presence of 3,4-dimethoxyphenethylamine and 6-aminocaproic acid to form an oil-water separation base film, the base material of the above-mentioned base film is bisphenol A polysulfone, and the above-mentioned catalytic degradation a material disposed within the base film; and,

[0037] Cross-linking on the surface of the base film to form an active hydrophilic layer, t...

Embodiment 1

[0056] The preparation method of multifunctional film material, comprises the following steps:

[0057] 1) Prepare graphene oxide dispersion and titanium dioxide dispersion with concentrations of 3.5 mg / mL and 2.5 mg / mL respectively using water as solvent, then ultrasonically mix the two dispersions, and then add anhydrous Ethanol, mixing to get the catalytic degradation material wetting solution, the weight ratio of graphene oxide and titanium dioxide in the above mixed solution is 7:1.5, the weight ratio of the mixed solution and absolute ethanol is 1:11, the transverse direction of the above-mentioned graphene oxide The size is 0.3-0.5μm, the number of layers is 10-13 layers, and the particle size of titanium dioxide is 20-30nm;

[0058] 2) Mix the catalytic degradation material wetting solution, additives and solvent morpholine, stir for 1 hour until uniformly dispersed, then add bisphenol A polysulfone dried overnight, ultrasonicate intermittently and mechanically stir fo...

Embodiment 2

[0064] The preparation method of the multifunctional film material of this embodiment is basically consistent with the steps in Example 1, the difference is:

[0065] In step 1), the concentrations of graphene oxide dispersion and titanium dioxide dispersion are 3mg / mL and 3.5mg / mL respectively, and the weight ratio of graphene oxide and titanium dioxide in the mixed solution is 5:1.5, and the transverse dimension of above-mentioned graphene oxide 0.4-0.7μm, the number of layers is 7-11 layers, and the particle size of titanium dioxide is 15-25nm;

[0066] In step 2), the intermittent ultrasonic treatment operating conditions are as follows: the power is 200W, the frequency is 25KHz, every ultrasonic 20min, pause 3min, alternately; wherein wetting liquid, additives, bisphenol A polysulfone and polyethylene glycol 400 The weight proportions in the casting solution are 14.5%, 0.6%, 16.5% and 3% respectively;

[0067] In step 3), the speed of the scraping film is 5m / min, and the...

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Abstract

The invention discloses a multifunctional film material as well as a preparation method and application thereof, and belongs to the field of functional film materials. The preparation method comprises: providing a film casting solution obtained by intermittent ultrasonic treatment, the film casting solution comprising a catalytic degradation material wetting solution, and a catalytic degradation material being graphene oxide and titanium dioxide; allowing the membrane casting solution to form an oil-water separation bottom membrane in a coagulating bath in which 3,4-dimethoxyphenylethylamine and 6-aminocaproic acid exist, with the catalytic degradation material being arranged in the bottom membrane; and forming an active hydrophilic layer on the surface of the bottom film through crosslinking, with the hydrophilic layer being a chitosan and polyvinyl acetate crosslinking layer. The preparation method provided by the invention can improve the hydrophilicity of the film, improve the fluxand retention rate of the film, reduce the flux reduction rate of the film and improve the flux recovery rate; the prepared film material can realize synchronism of oil-water separation and heavy metal adsorption, can be regenerated and recycled, and realizes multifunctional effects of photocatalytic degradation, oil resistance, self-cleaning and the like.

Description

technical field [0001] The invention belongs to the field of functional thin film materials, and in particular relates to multifunctional thin film materials and their preparation methods and applications. Background technique [0002] Wastewater discharge is already a worldwide problem, which brings many toxic substances to the ocean, which are passed through the marine food chain to every species from lower plants and algae to higher mammals, including human beings, threatening the species of organisms and human health. In addition to insoluble oil, industrial wastewater often also contains a large number of dispersed emulsions and heavy metal ions. Due to their toxicity and carcinogenic effects, heavy metals are considered to be "killers" that threaten health. [0003] The membrane separation process is usually carried out at room temperature without secondary pollution. It is an efficient and energy-saving separation and purification technology. It has been widely used i...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D71/68B01D71/02C02F1/28C02F1/30C02F1/40C02F1/44C02F101/20
CPCB01D67/0079B01D69/02B01D71/024B01D71/68B01D2325/10B01D2325/30B01D2325/36C02F1/28C02F1/30C02F1/40C02F1/44C02F2101/20
Inventor 不公告发明人
Owner 台州恒光反光材料有限公司
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