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Preparation method of super wetting titanium dioxide nanorod porous membrane and application of super wetting titanium dioxide nanorod porous membrane to emulsion separation

A titanium dioxide, super-wetting technology, applied in the field of titanium dioxide nanorod porous membrane and its preparation, super-wetting porous membrane and its preparation, can solve the problems of poor stability and limitations, and achieve high-efficiency separation, good application value, and convenient emulsion separation Effect

Active Publication Date: 2017-05-31
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Feng Lin et al prepared TiO on copper grid by solvothermal method 2 The nano-cluster rough structure, because the omentum has both superhydrophilic in the air, superoleophobic underwater and superoleophilic in the air, superhydrophobic under the oil properties, it can be used in a variety of oil-in-water and water-in-oil emulsions ( Reference 2: X.Lin, Y.Chen, N.Liu, Y.Cao, L.Xu, Y.Wei, L.Feng, In situ ultrafast separation and purification of oil / water emulsions by superwetting TiO 2 nanocluster-basedmesh 2016,8,8525.) However, these membranes used to separate emulsions have poor environmental stability, that is, they cannot exist stably in harsh environments such as acids, alkalis, and salts, so they are limited in practical applications

Method used

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  • Preparation method of super wetting titanium dioxide nanorod porous membrane and application of super wetting titanium dioxide nanorod porous membrane to emulsion separation
  • Preparation method of super wetting titanium dioxide nanorod porous membrane and application of super wetting titanium dioxide nanorod porous membrane to emulsion separation
  • Preparation method of super wetting titanium dioxide nanorod porous membrane and application of super wetting titanium dioxide nanorod porous membrane to emulsion separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, weigh 4g of PVP, 4g of glacial acetic acid, and 20g of ethanol in a 50mL Erlenmeyer flask, and continuously magnetically stir for 12h until completely dissolved to obtain a polymer PVP solution; at room temperature, weigh 12g of tetrabutyl titanate in In the aforementioned polymer PVP solution, the raw material was sealed with a conical bottle mouth, and magnetically stirred continuously at room temperature for 24 hours to form a yellow homogeneous and transparent spinning solution B.

[0034] Fill the spinning solution B into a syringe with a capacity of 10 mL, and advance at a speed of 4 mL / h. Connect the needle of the syringe to the positive pole of the high-voltage DC power supply, use tin foil as the receiving base, fix it on the roller, and connect it to the negative pole of the high-voltage power supply. Spinning parameters were adjusted: the electrospinning voltage was 19kV, the distance between the stainless steel needle and the receiving subst...

Embodiment 2

[0040] In this example, weigh 0.5g of PVP, 2.0g of glacial acetic acid, and 7.5g of ethanol in a 50mL Erlenmeyer flask, and continuously magnetically stir for 12h until completely dissolved; at room temperature, weigh 2.0g of tetrabutyl titanate in the aforementioned solution In the process, the raw material was sealed with a conical bottle mouth, and continuously magnetically stirred for 24 hours to form a yellow homogeneous and transparent spinning solution. Fill the spinning solution into a syringe with a capacity of 5 mL, and advance at a speed of 0.8 mL / h. Connect the needle of the syringe to the positive pole of the high-voltage DC power supply, use tin foil as the receiving base, fix it on the roller, and connect it to the negative pole of the high-voltage power supply. Adjust the spinning parameters: the electrospinning voltage is 15kV, the distance between the stainless steel needle and the receiving drum is adjusted to 18cm, and the rotating speed of the drum is 800r...

Embodiment 3

[0045] In this example, weigh 4.0g of PVP, 4.0g of glacial acetic acid, and 20g of ethanol in a 50mL Erlenmeyer flask, and continuously magnetically stir for 12h until completely dissolved; under ice bath conditions, weigh 12.0g of titanium isopropoxide in the aforementioned solution , Raw materials with sealed Erlenmeyer mouth, continuous magnetic stirring for 24h, forming a yellow homogeneous transparent spinning solution. Fill the spinning solution into a syringe with a capacity of 5 mL, and advance at a speed of 2 mL / h. Connect the needle of the syringe to the positive pole of the high-voltage DC power supply, use tin foil as the receiving base, fix it on the roller, and connect it to the negative pole of the high-voltage power supply. Adjust the spinning parameters: the electrospinning voltage is 20kV, the distance between the stainless steel needle and the receiver is adjusted to 25cm, and the drum speed is 1000r / min. Obtained PVP / TiO 2 The fiber diameter is relatively...

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Abstract

The invention discloses a preparation method of a super wetting titanium dioxide nanorod porous membrane and application of the super wetting titanium dioxide nanorod porous membrane to emulsion separation, and belongs to the technical field of function materials. The method comprises the following steps: preparing a PVP / TiO2 composite fiber membrane through an electrospinning technology, and drying the composite fiber membrane in a drying oven; laying the dried composite fiber membrane in a muffle furnace for calcining the composite fiber membrane for a certain period, removing organic carbon in the composite fiber membrane, calcining the composite fiber membrane to form an inorganic TiO2 fiber membrane, vertically laying the calcined inorganic TiO2 fiber membrane into a hydrothermal polymeric pecursor solution in a polytetrafluoroethylene liner, and performing a hydrothermal reaction, so as to obtain a super-hydrophilicity and underwater super-oleophobicity porous super wetting micro-nano composite structure membrane. The obtained membrane has high environmental stability, namely acid resistance, alkali resistance and salt resistance, and can be applied to sewage treatment in harsh acid and alkali salt environments, so that the efficient separation of a corrosive emulsion is realized, and e the application value is high. The preparation method is simple, and is convenient, efficient and rapid for emulsion separation.

Description

technical field [0001] The invention relates to a super-wetting porous membrane for oil-water emulsion separation and a preparation method thereof, in particular to a titanium dioxide nanorod porous membrane with high-efficiency oil-water emulsion separation capability and a preparation method thereof, belonging to the technical field of functional materials. Background technique [0002] Chemical oil plays a pivotal role in modern life and social development. At the same time, the discharge of oily wastewater has caused serious environmental pollution. In the presence of surfactants, the oil-water mixture will be emulsified to form a more stable compound. Therefore, oil-water Emulsion handling has become a major challenge. Traditional emulsion separation methods are: air flotation, chemical separation, gravity separation, centrifugation, electrical separation, heating separation, biological separation and wet coalescence separation, however this usually involves energy cons...

Claims

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Application Information

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IPC IPC(8): B01D17/02B01D17/022B01D71/02B01D63/02B01D67/00B01D69/12
CPCB01D17/02B01D17/0202B01D17/085B01D63/02B01D67/0041B01D67/0044B01D69/12B01D69/122B01D69/125B01D71/024B01D2323/02
Inventor 赵勇王女张媛媛
Owner BEIHANG UNIV
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