Preparation method for super-hydrophilic foam titanium used for oil-water separation

A titanium foam and super-hydrophilic technology, applied in the field of titanium foam, can solve the problems of unfavorable super-hydrophilic interface construction of nanotube structure, less research, poor stability of super-hydrophilicity, etc., and achieve excellent oil-water separation performance and operation The effect of simple method, simple and easy-to-obtain reagents and materials

Active Publication Date: 2016-09-07
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Porous titanium foam is a good oil-water separation material, but there is very little research in related fields
In 2015, Li et al prepared TiO on the surface of foamed titanium by anodic oxidation. 2 Nanotubes are used for oil-water separation, but the superhydrophilicity mentioned in this method is not stable; at the same time, the nanotube structure is not conducive to the construction of superhydrophilic interfaces (J. Mater. Chem.A, 2015, 3, 1279)

Method used

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  • Preparation method for super-hydrophilic foam titanium used for oil-water separation
  • Preparation method for super-hydrophilic foam titanium used for oil-water separation
  • Preparation method for super-hydrophilic foam titanium used for oil-water separation

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Effect test

Embodiment 1

[0027] (1) Pre-treatment of materials: The titanium foam (purity>99.7%) with a separation accuracy of 20 μm and a thickness of 1 mm is ultrasonically cleaned with acetone, ethanol, and deionized water at 80KHZ for 10 minutes to remove surface organic and inorganic pollutants, and then Soak in acetone for later use.

[0028] (2) Anodizing treatment: Weigh 0.3g of ammonium fluoride, add 15g of water and 84.7g of ethylene glycol to prepare 100g of 0.3% by weight ammonium fluoride electrolyte solution for use. Then use titanium foam as the anode, titanium foil as the cathode, and the distance between the two poles is 1.5cm. Under the action of an external DC voltage of 80V, perform anodic oxidation treatment. The temperature of the constant temperature water bath is 25°C. React for 8h, take it out, wash it with deionized water, and then air dry it. .

[0029] (3) UV light treatment: the dried titanium foam sample was treated with 90mW / cm 2 A UV lamp was used to irradiate the sam...

Embodiment 2

[0032] (1) Pre-treatment of materials: The titanium foam (purity>99.7%) with a separation accuracy of 20 μm and a thickness of 1 mm is ultrasonically cleaned with acetone, ethanol, and deionized water at 80KHZ for 10 minutes to remove surface organic and inorganic pollutants, and then Soak in acetone for later use.

[0033] (2) Anodizing treatment: Weigh 0.4g of ammonium fluoride, add 18g of water and 81.6g of ethylene glycol to prepare 100g of 0.4% by weight ammonium fluoride electrolyte solution for use. Then use titanium foam as the anode, titanium foil as the cathode, and the distance between the two poles is 1.5cm. Under the action of an external DC voltage of 80V, carry out anodic oxidation treatment. .

[0034] (3) UV light treatment: the dried titanium foam sample was treated with 90mW / cm 2 A UV lamp was used to irradiate the sample for 10 minutes at a distance of 20 cm from the sample.

[0035] The obtained material, appearance and oil-water separation performance ...

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Abstract

The invention discloses a preparation method for super-hydrophilic foam titanium used for oil-water separation. The preparation method includes the three steps of material pretreatment, anode oxidizing treatment and ultraviolet radiation. The surface of the obtained foam titanium is composed of intrinsic hydrophilic fluorine titanium oxide and is covered with countless nano-cavities at the same time, the roughness coefficient Rq reaches 35.6 nm, and the hydrophilic performance of the surface of the foam titanium can be further enhanced. The foam titanium has good super-hydrophilicity and underwater super-oleophobicity, the water drop contact angle in air is 0 degree, the underwater oil contact angle is 160 degrees, and a good oil-water separation effect is achieved. When the filter fineness reaches 20 micrometers or below, the foam titanium can further be used for emulsion separation, and the separation efficiency can reach 99% or more. The method is easy to operate, the obtained material has good stability and super-hydrophilicity, and the oil-water separation effect is remarkable; and meanwhile, due to the fact that the titanium material has the characteristics of being nontoxic, environmentally friendly and the like, the titanium has important significance in the fields of oil-containing sewage treatment, oil recovery and the like.

Description

technical field [0001] The invention relates to the technical field of titanium foam, in particular to a method for preparing superhydrophilic titanium foam used for oil-water separation. Background technique [0002] Titanium foam is a porous metal material with the advantages of non-toxicity, environmental friendliness, and good biocompatibility. It has been favored by more and more scientific researchers in recent years. [0003] The development and application of materials are usually inseparable from their mature preparation technologies. The preparation method of foamed titanium has also attracted much attention in recent years. Its preparation principle is to mix titanium particles with a pore-forming agent (such as urea), and then calcine it at a high temperature under a certain pressure (CN103131883A; CN103447533A). By adjusting various parameters in the process, titanium foam with different porosity can be obtained, thus providing more options for its subsequent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
CPCC25D11/26
Inventor 莫冬传罗智勇吕树申
Owner SUN YAT SEN UNIV
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