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Porous polymer membrane of inlaid molecular sieve with adsorption function

A technology of molecular sieve and polymer, applied in the direction of adsorption water/sewage treatment, membrane technology, semi-permeable membrane separation, etc., can solve the problem of low adsorption capacity of dynamic filtration, achieve good dynamic adsorption and retention performance, high adsorption rate, dynamic The effect of large adsorption capacity

Active Publication Date: 2015-04-08
天津鼎芯膜科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the static adsorption capacity of this kind of membrane adsorbent is high, the dynamic filtration adsorption capacity of this kind of adsorbent is low due to the low instantaneous adsorption capacity of the ion exchange resin itself, and more membranes need to be used in practical applications to meet the requirements

Method used

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  • Porous polymer membrane of inlaid molecular sieve with adsorption function
  • Porous polymer membrane of inlaid molecular sieve with adsorption function
  • Porous polymer membrane of inlaid molecular sieve with adsorption function

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preparation example Construction

[0039] The present invention has simultaneously designed the preparation method of the polymer porous membrane inlaid with molecular sieves, which comprises the following steps:

[0040] 1. Preparation of casting solution: According to the mass percentage requirements of the polymer porous membrane embedded with molecular sieve, in order to make the molecular sieve particles evenly suspended without sedimentation, the above-mentioned components need to be mixed in a specific way, at 30-120°C Stir for 4 to 12 hours, and stand for 24 to 48 hours for defoaming to prepare a uniformly mixed casting solution;

[0041] 2. Membrane production: At room temperature, scrape and coat the prepared casting solution on a flat glass plate to form a flat film, and then soak it in a coagulation water bath at room temperature for 12 to 72 hours to make the film solidify and form completely. The residual solvent and additives therein are ensured to be removed completely, so that the polymer porou...

Embodiment 1

[0050] The mass percent formulation design of the polymer porous membrane casting solution embedded with molecular sieves is: 16wt% polyethersulfone; 16wt% 4A molecular sieve (polyethersulfone / 4A molecular sieve=50 / 50), molecular sieve average particle diameter 4.7 μ m, 1% silicon Coupling agent KH550; 15wt% polyethylene glycol; 2wt% polyvinylpyrrolidone and 50wt% N,N dimethylacetamide.

[0051] The process of manufacturing the polymer porous membrane embedded with molecular sieves is as follows: first add 8g 4A molecular sieves to 25g DMAc and stir. After the dispersion is uniform, add 0.5g KH550, 7.5g PEG and 1g PVP respectively, and add in several times after the solids are completely dissolved. 8g PES, to ensure that the molecular sieve is evenly dispersed in the polymer, after adding PES, stir the solution at 60°C for 4-12 hours; after the dissolution and dispersion are complete, ultrasonic degassing at room temperature for 1-3 hours, and prepare a casting solution; Manua...

Embodiment 2

[0053] The mass percent formulation design of the polymer porous membrane casting solution embedded with molecular sieves is: 16wt% polyethersulfone; 10.7wt% 4A molecular sieve (polyethersulfone / 4A molecular sieve=60 / 40), average particle diameter 4.7 μ m; 15wt% polyethersulfone Ethylene glycol; 1% silicon coupling agent KH560; 4wt% polyethylene oxide and 53.3wt% N,N dimethylacetamide.

[0054] The process of manufacturing the polymer porous membrane embedded with molecular sieves is as follows: first add 5.3g 4A molecular sieves to 26.7g DMAc and stir. After the dispersion is uniform, add 0.5g KH560, 7.5g PEG and 2g polyethylene oxide, and divide the mixture after the solids are completely dissolved. Add 8g PVDF several times to ensure that the 4A molecular sieve is uniformly dispersed in the polymer. After adding PES, stir the solution at 90°C for 4-12 hours; Forming the casting film; scraping the casting film manually on the glass plate to form a flat film with a thickness ...

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Abstract

The invention provides a porous polymer membrane of an inlaid molecular sieve with an adsorption function, and particularly relates to a preparation method of the porous polymer membrane of the inlaid molecular sieve, which can remove heavy metal ions and nitrogen phosphorous and other pollutants in water by adopting membrane adsorption technology. A casting solution for preparing the porous polymer membrane of the inlaid molecular sieve comprises the following components in percentage by mass: polymer / molecular sieve adsorption material with the mass ratio being 90 / 10-10 / 90 and the concentration sum being 20%-50%, 4%-30% of pore-forming additives, 1%-5% of a particle dispersion-suspension stabilizer, 30%-75% of solvents, wherein the percentage sum of all the components is 100%. The molecular sieve adsorption material is evenly inlaid and dispersed into a porous membrane matrix material, the adsorption rate is high, the dynamic adsorption capacity is large, pollutants in water can be fast removed with a broad spectrum, and the eutrophication problem of a water body can be solved.

Description

【Technical field】 [0001] The invention belongs to the technical field of water treatment and wastewater treatment, and relates to an adsorption membrane for removing pollutants in water bodies, in particular to the preparation of a polymer porous membrane capable of removing heavy metal ions and nitrogen and phosphorus pollutants in water bodies by membrane adsorption and filtration technology method. 【technical background】 [0002] Recently, the phenomenon of eutrophication of lakes and oceans has intensified, and the problem of heavy metal water pollution has become prominent, which not only aggravates the shortage of water resources, but also directly affects the safety of drinking water, and ultimately endangers human health. Therefore, effective removal of heavy metals and nitrogen and phosphorus pollution in water sources is an important task faced by water treatment technology today. [0003] At present, a lot of research has been done on the technology of nitrogen a...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D71/30B01D71/34B01D71/38B01D71/42B01D69/08B01D69/06B01D67/00B01J20/26C02F1/28C02F1/44C02F1/58C02F1/62
Inventor 张磊孙建新张玉忠李泓
Owner 天津鼎芯膜科技有限公司
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