Method for preparing strong-hydrophilicity PET membrane

A water-based, strong affinity technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of affecting the hydrophilicity of the PET material surface, easy deposition and adsorption on the membrane surface, increasing the cost of sewage treatment, etc., to facilitate industrialization. The effect of low production, low price and low manufacturing cost

Inactive Publication Date: 2016-03-30
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The macromolecular chain structure of PET is regular, and there are no polar groups in the molecule, so the surface affinity is poor, which greatly affects the surface hydrophilicity of PET materials.
At present, PET membranes are used in the water treatment industry. Since the membrane surface is hydroph...

Method used

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  • Method for preparing strong-hydrophilicity PET membrane
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  • Method for preparing strong-hydrophilicity PET membrane

Examples

Experimental program
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Embodiment 1

[0027] a Take 0.1g of stannous chloride and put it into a beaker, add 20ml of acetone to completely dissolve the stannous chloride to obtain the acetone solution of stannous chloride, that is, the dopant.

[0028] b take nano-SiO 2 Put 6.00g into a beaker, add 100mL deionized water, and ultrasonically disperse for 1h. Then, 2.10 g of 3-aminopropyltrimethoxysilane was added under vigorous stirring, and the pH of the solution was adjusted to 5 with hydrochloric acid (the volume ratio of HCl to water was 1:1). Stir at 70° C. for 24 hours, then put it into a dialysis bag, and dialyze in deionized water at 4° C. for 48 hours to dialyze out small molecules. After the dialysis is completed, a modified nano-silica solution is obtained.

[0029] c Blend 10 mL of tetrachloroethane and 15.86 g of phenol to obtain a mixed solvent, add 0.4 g of PET particles to the mixed solvent, and raise the temperature to 130° C. until the PET particles dissolve. Add 0.48ml doping liquid to the soluti...

Embodiment 2

[0033] a Take 0.1g of stannous chloride and put it into a beaker, add 20ml of acetone to completely dissolve the stannous chloride to obtain the acetone solution of stannous chloride, that is, the dopant.

[0034] b take nano-SiO 2 Put 6.00g into a beaker, add 100mL deionized water, and ultrasonically disperse for 1h. Then, 2.10 g of 3-aminopropyltrimethoxysilane was added under vigorous stirring, and the pH of the solution was adjusted to 5 with hydrochloric acid (the volume ratio of HCl to water was 1:1). Stir at 70° C. for 24 hours, then put it into a dialysis bag, and dialyze in deionized water at 4° C. for 48 hours to dialyze out small molecules. After the dialysis is completed, a modified nano-silica solution is obtained.

[0035] c Blend 10 mL of tetrachloroethane and 15.86 g of phenol to obtain a mixed solvent, add 0.4 g of PET particles to the mixed solvent, and raise the temperature to 130° C. until the PET particles dissolve. Add 0.24ml doping liquid to the soluti...

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Abstract

A disclosed method for preparing a strong-hydrophilicity PET membrane comprises the following steps: a, dissolving stannous chloride, cupric chloride or calcium chloride into an acetone solution, so as to obtain a doping solution; b, adding nanometer silicon dioxide into deionized water, performing ultrasonic dispersing, then adding a silane coupling agent under stirring condition, and adjusting pH value of the solution with a hydrochloric acid, so as to obtain a modified nanometer silicon dioxide solution; c, adding a PET particle into a mixed solvent of tetrachloroethane and phenol, heating to completely dissolve PET particle, and then adding the doping solution obtained in the steps a, so as to prepare a PET membrane forming solution, and dropwise adding the PET film forming solution to a glass slide, and then putting in a vacuum baker for drying, so as to obtain a blended membrane; and d, immersing the blended membrane obtained in the step c in the modified nanometer silicon dioxide solution obtained in the step b, and taking out and naturally drying in air after immersion is finished, so as to obtain the strong-hydrophilicity PET membrane. The prepared strong-hydrophilicity PET membrane possesses strong anti-pollution capability and possesses relatively good application prospect in the fields of water processing industry and the like.

Description

technical field [0001] The invention relates to a method for preparing a strongly hydrophilic PET film. Background technique [0002] PET is currently an important synthetic material. Its low production cost and high cost performance make it used in a wide range of fields such as mechanical equipment, biomedicine, textile processing, food packaging, information industry, and optical materials. With the rapid development of these fields, higher requirements have been put forward for polymer materials. In order to better meet this demand, people have begun to study the improvement of PET performance. The PET macromolecular chain structure is regular, and there are no polar groups in the molecule, so the surface affinity is poor, which greatly affects the surface hydrophilicity of PET materials. At present, PET membranes are used in the water treatment industry. Since the membrane surface is hydrophobic and the solution has no hydrogen bond interaction, the hydrophobic solute ...

Claims

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Application Information

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IPC IPC(8): B01D71/48B01D69/02B01D67/00
CPCB01D67/0079B01D69/02B01D71/48B01D2325/36
Inventor 周圣文王力赵欢方亮吕晓璇赵可管承东
Owner SHANDONG UNIV OF SCI & TECH
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