Temperature-sensitive paraffin perfusion film as well as preparation and application thereof

A temperature-sensitive, paraffin technology, applied in the field of membrane materials, to achieve the effect of simple preparation process and high flux recovery rate

Pending Publication Date: 2022-05-06
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Smart surfaces that respond to external stimuli have been used in artificial liquid flow switching devices, smart separation, and droplet microfluidics, but there are few reports on membrane water treatment.

Method used

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  • Temperature-sensitive paraffin perfusion film as well as preparation and application thereof
  • Temperature-sensitive paraffin perfusion film as well as preparation and application thereof
  • Temperature-sensitive paraffin perfusion film as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: a kind of temperature-sensitive type paraffin perfusion membrane and preparation method thereof, concrete steps are:

[0051] (1) mixing paraffin wax and n-hexane with a mass ratio of 1:5, and melting at 50°C;

[0052] (2) Suction filter 1 mL of the paraffin and n-hexane mixture described in (1) while hot to the area prepared in Comparative Example 1 of 12.56 cm 2 The surface of the polyethersulfone fluorinated membrane, wherein the suction filtration pressure is 0.01MPa.

[0053] Through the above steps, a temperature-sensitive paraffin perfusion membrane based on a polyethersulfone porous membrane is obtained, wherein the content of paraffin on the surface of the polyethersulfone fluorinated membrane is 0.579 mg / cm 2 .

[0054] Compared with the polyethersulfone fluorinated membrane, the prepared temperature-sensitive paraffin perfusion membrane has temperature-sensitive characteristics in surface wettability and anti-pollution: such as figure 1 As sh...

Embodiment 2

[0061] Embodiment 2: a kind of temperature-sensitive type paraffin perfusion membrane and preparation method thereof, concrete steps are:

[0062] (1) According to the method of Comparative Example 1, the polypropylene membrane with a porosity of 72% and an average pore diameter of 0.6 μm is used as the base membrane to prepare a polypropylene membrane with a fluorinated rough layer on the surface, which is denoted as a polypropylene fluorinated membrane ;

[0063] (2) mixing paraffin wax and n-hexane with a mass ratio of 1:7, and melting at 50°C;

[0064] (3) Suction filter 1.5mL of the paraffin and n-hexane mixture described in (2) while hot until the area prepared in (1) is 18.84cm 2 The surface of the polypropylene fluorinated membrane, wherein the suction pressure is 0.01MPa.

[0065] Through the above steps, a temperature-sensitive paraffin perfusion membrane based on a polypropylene porous membrane is obtained, wherein the content of paraffin on the surface of the pol...

Embodiment 3

[0073] Embodiment 3: a kind of temperature-sensitive paraffin perfusion membrane and preparation method thereof, concrete steps are:

[0074] (1) According to the method of Comparative Example 1, with a porosity of 55%, and a polyvinylidene fluoride film with an average pore diameter of 0.5 μm as the base film, a polyvinylidene fluoride film with a fluorinated rough layer on the surface is prepared, which is denoted as polyvinylidene fluoride film. Vinylidene fluoride film;

[0075] (2) mixing paraffin wax and n-hexane with a mass ratio of 1:10, and melting at 50°C;

[0076] (3) Suction filter 2 mL of the paraffin and n-hexane mixture described in (2) while hot until the area prepared by (1) is 24 cm 2 The surface of the polyvinylidene fluoride fluoride membrane, wherein the suction filtration pressure is 0.01MPa.

[0077] Through the above steps, a temperature-sensitive paraffin perfusion membrane based on a polyvinylidene fluoride porous membrane is obtained, wherein the c...

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Abstract

The temperature-sensitive paraffin perfusion film and the preparation method thereof provided by the invention can overcome the problem that a liquid lubricant is easy to lose in the prior art, and have both the stability of a solid coating and the pollution resistance of the liquid lubricant. According to the technical scheme, the surface of the polymer porous membrane is coated with molten solid paraffin through suction filtration. The surface wettability and pollution resistance of the prepared paraffin perfusion membrane have the temperature sensitive characteristic, the stability of paraffin on the surface of the membrane is high, and efficient pollution resistance in membrane filtration can be achieved. The method can be used in the fields of wastewater treatment, food processing and biological medicine.

Description

technical field [0001] The invention belongs to the field of membrane materials, and in particular relates to a temperature-sensitive paraffin perfusion membrane and its preparation and application. Background technique [0002] Membrane separation technology, as an emerging environmental separation technology, has received more and more attention in the fields of water treatment, food processing, and medical treatment. However, membrane fouling is an unavoidable problem in the membrane separation process, resulting in clogged membrane pores, decreased flux, and shortened membrane service life. In order to solve the problem of membrane fouling, the development of anti-fouling membranes has been a research hotspot. At present, hydrophilic polymers or zwitterionic polymers are often used to modify the surface of membranes by blending, grafting, coating or irradiation to cause changes in wettability, or to prepare Biologically inspired surface coatings, such as lotus leaf-lik...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D71/34B01D71/26B01D69/02B01D67/00
CPCB01D71/68B01D71/34B01D71/26B01D69/02B01D67/0002
Inventor 赵莉芝李日舜张玉忠尚琰龙李志欣吴钒姚安锋
Owner TIANJIN POLYTECHNIC UNIV
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