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UiO-66 composite forward osmosis membrane and preparation and application thereof

A forward osmosis membrane, uio-66 technology, applied in the field of forward osmosis membrane and its preparation and application, can solve the problems of forward osmosis membrane permeability, insufficient adsorption and retention capacity, etc., and achieve remarkable adsorption and retention capacity, good retention performance, compatibility good effect

Active Publication Date: 2019-12-03
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a UiO-66 composite forward osmosis membrane and its preparation method and application, so as to overcome the shortcomings of the forward osmosis membrane in the prior art, such as insufficient permeability, adsorption and retention capacity, etc.

Method used

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  • UiO-66 composite forward osmosis membrane and preparation and application thereof
  • UiO-66 composite forward osmosis membrane and preparation and application thereof
  • UiO-66 composite forward osmosis membrane and preparation and application thereof

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Embodiment 1

[0043] (1) Preparation of UiO-66: UiO-66 was prepared by solvothermal method. First, 0.2332g of anhydrous zirconium chloride and 0.1661g of terephthalic acid were dissolved in 50mL of N,N-dimethylformamide solution. and stirred for 5 minutes, then transferred to a 100 mL polytetrafluoroethylene-lined reactor, covered with a lid, and reacted in an oven at a temperature of 120° C. for 24 hours. After the reaction was completed, it was cooled to room temperature, and a white powdery substance UiO-66 was obtained after suction filtration. In addition, the resulting material was purified with methanol to remove unreacted terephthalic acid adsorbed on the pores. All the powder was transferred to a conical flask, methanol (50 mL) was added in batches, and the mixture was shaken continuously for one hour. The mixed solution was suction-filtered to obtain a white powder, which was vacuum-dried overnight in an oven at 120°C, and finally ground and sieved to obtain the UiO-66 required f...

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Abstract

The invention relates to a UiO-66 composite forward osmosis membrane and preparation and application thereof. The osmosis membrane comprises a porous UiO-66 / PSF supporting layer, a polyamide active layer, a polydopamine layer, a polyethyleneimine layer, a UiO-66 layer and a polyacrylic acid layer, wherein the polydopamine layer, the polyethyleneimine layer, the UiO-66 layer and the polyacrylic acid layer are sequentially attached to the surface of the polyamide active layer. The preparation method comprises the following steps: carrying out electrostatic spinning on a prepared UiO-66 and PSF spinning solution to obtain a PET spinning cloth carried UiO-66 / PSF nanofiber base membrane; and then immersing the surface of the membrane into a m-phenylenediamine aqueous solution, pouring a trimesoyl chloride solution on the surface of the membrane and keeping dry, and after pretreating the obtained composite forward osmosis membrane, soaking the pretreated forward osmosis membrane in a dopamine solution, a PEI solution, a UiO-66 solution and a PAA solution sequentially. The osmosis membrane has the characteristics of high hydrophilicity, high water flux and low salt back-mixing flux, and has good interception performance on several kinds of typical heavy metal and antibiotic wastewater.

Description

technical field [0001] The invention belongs to the field of forward osmosis membrane and its preparation and application, in particular to a UiO-66 composite forward osmosis membrane and its preparation method and application. Background technique [0002] Trace amounts of heavy metals and antibiotics in wastewater are difficult to degrade and are easy to cause pollution. They are potentially harmful to aquatic animals, plants and human health. Conventional treatment methods have low removal efficiency. It is urgent to find new methods to efficiently remove heavy metals and antibiotics. [0003] Forward Osmosis (FO) membrane technology is a membrane technology that has been studied more in recent years. Because of its low energy consumption and anti-pollution performance, it has a wide application prospect. Based on its excellent performance in adsorption, UiO-66 material has also been used in membrane research in recent years, which has improved the performance of forward ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/00B01D67/00B01D69/12C02F1/44C02F101/20
CPCB01D61/002B01D67/0079B01D69/12C02F1/445C02F2101/20
Inventor 黄满红张月洋吴敏杰陈刚陈海生蒋楠郭吉丽邬倩倩
Owner DONGHUA UNIV
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