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A kind of polymer adsorbent/cellulose acetate composite membrane material and its preparation method and application

A technology of cellulose acetate and cellulose acetate, which is applied in the field of polymer adsorbent/cellulose acetate composite membrane material and its preparation, can solve the problems of high production cost and long equilibrium period, and achieve lower detection limit and high adsorption effect of effect

Active Publication Date: 2019-09-27
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a polymer adsorbent / cellulose acetate composite membrane material and its preparation method and application. The shortcomings of collecting hydrophobic and hydrophilic pollutants, as well as the long equilibration period and high production cost of existing passive samplers

Method used

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  • A kind of polymer adsorbent/cellulose acetate composite membrane material and its preparation method and application
  • A kind of polymer adsorbent/cellulose acetate composite membrane material and its preparation method and application
  • A kind of polymer adsorbent/cellulose acetate composite membrane material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, preparation HLB (polystyrene-N-pyrrolidone copolymer)-cellulose acetate composite film

[0037] In terms of mass percentage: 95.9% of cellulose acetate, 4.1% of HLB adsorbent (Oasis HLB, 30 μm in the United States) (that is, the mass ratio of cellulose acetate to HLB adsorbent is 95.9:4.1), including the following steps:

[0038] (1) The formula of the membrane used in the experiment is as follows: 18 g of cellulose acetate; 10 g of dioxane; 70 g of acetone; 2 g of magnesium perchlorate; 0.86 g of HLB adsorbent; Mix in the bottle to configure the casting solution;

[0039] (2) Homogenize the casting solution: place the Triangle brand filled with the above-prepared casting solution in a constant temperature shaking box, keep the temperature at 25°C, and oscillate until the film solution is completely mixed evenly, then HLB-acetic acid can be prepared Casting solution of cellulose composite membrane;

[0040] (3) Membrane production by conventional L-S pha...

Embodiment 2

[0046] Embodiment 2: prepare PS-DVB (polystyrene-divinylbenzene)-cellulose acetate composite film

[0047] In terms of mass percentage, 95.9% of cellulose acetate and 4.1% of PS-DVB adsorbent (Macherey nagel, Germany, 46 μm) (that is, the mass ratio of cellulose acetate to PS-DVB adsorbent is 95.9:4.1), including the following step:

[0048] (1) The formula of the membrane used in the experiment is as follows: cellulose acetate 18g; Dioxane 10g; Acetone 70g; Magnesium perchlorate 2g; PS-DVB adsorbent 0.86g; Mix in the Erlenmeyer flask, configure casting solution;

[0049] (2) Homogenize the casting solution: put the Triangle brand filled with the above-prepared casting solution in a constant temperature shaking box, keep the temperature at 25°C, oscillate until the film solution is completely mixed evenly, and then PS-DVB can be prepared -casting solution of cellulose acetate composite membrane;

[0050] (3) Membrane production by conventional L-S phase inversion method: in...

Embodiment 3

[0056] The enrichment experiment of the HLB-cellulose acetate composite membrane material prepared in embodiment 3 and embodiment 1

[0057] Utilize the HLB-cellulose acetate composite membrane material prepared in Example 1 to enrich 37 kinds of organic compounds (1.49ow ow is the octanol-water partition coefficient).

[0058] Put the composite membrane material prepared in Example 1 with an area of ​​2×3cm (mass about 0.0326g) into a 1L brown reagent bottle with a 0.8L aqueous solution. In the aqueous solution, 13 kinds of organic phosphorus flame retardants, 8 The concentrations of phenols and 2 estrogens were all 400ng / L, and the concentrations of 6 organophosphorus pesticides and 8 triazine pesticides were 200ng / L. Set up multiple groups of the above-mentioned systems and put them on a constant temperature shaker (150r / min) at 28°C for shaking, and the shaking time is 0h, 1h, 2h, 3h, 6h, 12h, 24h, 36h, 48h, 60h and 72h, each group The shaking time was set in three parall...

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Abstract

The invention discloses a polymer adsorbent / cellulose acetate composite membrane material and a preparation method and application thereof. The preparation method of the composite membrane material comprises the following steps: dissolving a polymer adsorbent and a cellulose acetate polymer into a solvent to obtain a film casting solution; and forming a film from the film casting solution to obtain the composite membrane material. The composite membrane material can be used for enrichment and passive collection of hydrophobic organic pollutants and hydrophilic organic pollutants from water bodies; the logKow of the hydrophobic organic pollutants or the hydrophilic organic pollutants is 1.49-9.47, Kow is octanol-water partition coefficient, and the organic pollutants comprises organic phosphate flame retardants, phenols, estrogen, organophosphorus pesticides and triazine pesticides and other organic compounds. The polymer adsorbent in the composite membrane material is particularly important for the passive collection of trace pollutants (usually nanogram per liter level) in the water environment, can be used for enrichment of pollution with the concentration time reaching 10<3>-10<6>, and greatly reduces the detection limit of the pollutants.

Description

technical field [0001] The invention relates to a polymer adsorbent / cellulose acetate composite membrane material and a preparation method and application thereof. Background technique [0002] With the intensification of industrialization of the social environment, there are a large number of toxic and harmful organic pollutants in both the natural water environment and the artificial water environment. These pollutants come from a wide variety of sources, including industrial emissions, pesticide use, fossil fuel combustion, and releases from domestic sources. The exposure and environmental risk research of trace organic pollutants in water has been a hot spot in environmental research in recent years, followed by the rise of their collection and detection technology. In the past 20 years, the passive sampling technology of organic pollutants in water has also been developed rapidly. Passive sampling technology has the advantages of reducing the detection limit of pollut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/16B01D69/12B01D69/02B01D67/00G01N1/40C02F1/44C02F101/30
Inventor 许宜平高小中马梅王子健
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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