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Polyester fiber membrane for wastewater treatment and preparation method thereof

A polyester fiber membrane and wastewater treatment technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., to achieve good regenerative effects

Pending Publication Date: 2021-02-05
邓颖菁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Wang Wenyu, Jin Xu, Shi Changqu, Jin Xin, Li Liuqian, Lin Tong. Preparation of polyester / keratin nanofiber membrane and its chromium ion adsorption performance. Journal of Tianjin University of Technology, 2019,38(03):15-21 .), but there is no report on the use of modified polyester fiber membranes in the synthesis stage for metal adsorption

Method used

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  • Polyester fiber membrane for wastewater treatment and preparation method thereof
  • Polyester fiber membrane for wastewater treatment and preparation method thereof
  • Polyester fiber membrane for wastewater treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first step: Weigh 5-(1H-1,2,4-triazol-1-yl) isophthalic acid, ethylene glycol, and antimony acetate into the reaction kettle, and feed N 2 , control the reaction pressure at 0.40MPa, carry out the esterification reaction at 200°C, stop the reaction when the esterification rate reaches 82%, and obtain 5-(1H-1,2,4-triazol-1-yl)isophthalic acid Ethylene formate.

[0026] Step 2: Weigh 5-(1H-1,2,4-triazol-1-yl)ethylene isophthalate, benzoic acid, ethylene glycol, antimony acetate and trimethyl phosphate into the reaction kettle , into N 2 , when the temperature rises to 240°C, start the vacuum pump, control the vacuum degree within 1000Pa, carry out the transesterification reaction for 1h, raise the temperature to 270°C, and the vacuum degree is lower than 50Pa, start the polycondensation reaction for 2h, release the vacuum with nitrogen and exit material to obtain copolyester.

[0027] The third step: use chloroform: trifluoroacetic acid volume ratio of 3:1 as the s...

Embodiment 2

[0033] The difference from Example 1 is:

[0034] In the second step, the feed ratio of benzoic acid, 5-(1H-1,2,4-triazol-1-yl) ethylene isophthalate, ethylene glycol is 150:20:180, antimony acetate and The quality of trimethyl phosphate is 0.05% (mass) of benzoic acid.

Embodiment 3

[0036] The difference from Example 1 is:

[0037] In the second step, the feeding ratio of benzoic acid, ethylene glycol 5-(1H-1,2,4-triazol-1-yl)isophthalate and ethylene glycol is 100:9:120.

[0038] In the third step, the electrospinning parameters are: spinning voltage 24kV, receiving distance 10cm, spinning solution flow rate 0.5mL / h, and spinning speed 40μm / min.

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Abstract

The invention discloses a polyester fiber membrane for wastewater treatment and a preparation method thereof, and the preparation method comprises the following steps: taking 5- (1H-1, 2, 4-triazole -1-yl) isophthalic acid as a third monomer, carrying out ester exchange and condensation polymerization with ethylene glycol terephthalate to prepare copolyester, and then carrying out electrostatic spinning to prepare the polyester fiber membrane; and triazole nitrogen has lone pair electrons, can quickly form a stable complex with Cd (II), Cr (VI) and Pb (II), and is chemically grafted to a PET molecular chain, so that the fiber membrane has good reproducibility, can be recycled for multiple times, and can be applied to the field of wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of membranes, and in particular relates to a polyester fiber membrane used for wastewater treatment and a preparation method thereof. Background technique [0002] In recent years, with the acceleration of industrialization, a large amount of industrial wastewater and urban domestic sewage containing heavy metals have been discharged into the environment, which has brought serious harm to the atmosphere, soil and water environment, especially human health. The main hazard to the human body is lead , cadmium, chromium, mercury, arsenic. At present, there are many methods to deal with heavy metal ions, such as chemical precipitation, ion exchange, etc., but due to the large amount of sludge and secondary pollution, the application is limited, and the membrane adsorption method is easy to operate and low in cost. Potential means of adsorption and purification of heavy metal ions in industrial wastewater. [0...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28C02F1/28D01F6/92D01F1/10C08G63/685C02F101/20
CPCB01J20/264B01J20/28038C02F1/285D01F6/92D01F1/10C08G63/6856C02F2101/20
Inventor 邓颖菁
Owner 邓颖菁
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