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Acetyl cellulose/Fe-Al oxide composite membrane, and its preparing method and use

A technology of cellulose acetate and iron-aluminum oxide, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of difficult separation of error resin particles and soil particles, and achieve leakage prevention, uniform texture, unbreakable effect

Inactive Publication Date: 2005-07-20
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to: overcome the defect that existing membrane materials for enriching trace organic pollutants in water bodies cannot be used to enrich or remove inorganic phosphorus pollutants; The separation of soil particles is difficult and other defects; thereby providing a new type of organic-inorganic composite membrane using cellulose acetate polymer as a frame material; through the membrane synthesis process using dilute ammonia water as a coagulation bath, the iron oxide / Aluminum particles as a phosphorus "sink" method, in which the filled iron oxide / aluminum particles are evenly distributed in the framework of the membrane structure material; Phosphate Applications

Method used

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  • Acetyl cellulose/Fe-Al oxide composite membrane, and its preparing method and use
  • Acetyl cellulose/Fe-Al oxide composite membrane, and its preparing method and use
  • Acetyl cellulose/Fe-Al oxide composite membrane, and its preparing method and use

Examples

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Embodiment 1

[0029] Prepare a cellulose acetate-iron oxide composite film, its composition (in mass percent) is: cellulose acetate 93.7%, iron oxide 6.3% (as Fe 2 o 3 count).

[0030] The method for preparing the above-mentioned cellulose acetate-iron oxide composite film comprises the following steps:

[0031] (1) The film formula for the experiment is as follows: cellulose diacetate 18g; dioxane 10g; acetone 70g; magnesium perchlorate 2g; add 4g ferric chloride (FeCl 3 ·6H 2 0); The said material is mixed in the Erlenmeyer flask with a ground stopper, and the casting solution is prepared;

[0032] (2) Homogenize the casting solution: place the triangular flask containing the above prepared casting solution in a constant temperature oscillation box, keep the temperature between 25°C and 45°C, and oscillate until the film solution is completely dissolved and uniform, that is, The casting solution of cellulose acetate / iron oxide composite film can be prepared evenly;

[0033] (3) Membr...

Embodiment 2

[0043] Prepare another cellulose acetate-iron oxide composite film, its composition (by mass percentage) is: cellulose acetate 97.5%, iron oxide 2.5% (as Fe 2 o 3 count).

[0044] The preparation method of the composite membrane is as follows: wherein the composite membrane formula is as follows: cellulose diacetate 22g; dioxane 6g; acetone 68g; magnesium perchlorate 2g, iron trichloride (FeCl 3 ·6H 2 (2) 2g; the operation steps are the same as in Example 1, except that step (2) homogenizes the casting solution: the temperature remains at about 35°C; Evaporate and dry in an oven at 35°C for 60 seconds; immerse the prepared film liquid layer together with a scraper in 1% ammonia water, keep the temperature at 20°C-25°C, and immerse for 7-10 minutes to promote the iron oxide particles Formed in the film, the cellulose acetate / iron oxide composite film was obtained at this time. The basic physical and chemical properties of the resulting film are similar to those of the film ...

Embodiment 3

[0046] Prepare a cellulose acetate-iron oxide composite film again, its composition (by mass percentage) is: cellulose acetate 87%, iron oxide 13% (as Fe 2 o 3 count). The formula of the film used in the experiment is as follows: cellulose diacetate 16g; dioxane 10g; acetone 70g; ferric chloride (FeCl 3 ·6H 2 (0) 8g; Operation steps are with embodiment 1. Most of the physical and chemical properties of the obtained film are similar to those of the film produced in Example 1, and the ash content is slightly higher, about 16% to 23%.

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Abstract

The present invention relates to a cellulose acetate / iron and aluminium oxide composite film material, its preparation method and application. Said composite film material is formed from 85%-98% of cellulose acetate and 2%-5% of iron / aluminium compound, its thickness is 30-40 micrometers, and it is transparent and has reddish brown colour. Said invention also provides the concrete steps of its preparation method, and said film can be used for determining biological effective state phosphorus in the water and high-gathered trace phosphorus in the water.

Description

technical field [0001] The invention relates to an artificially synthesized polymer film for environmental monitoring and pollution control and a preparation method thereof, in particular to a cellulose acetate / iron-aluminum oxide composite film material and a preparation method thereof, and the above-mentioned composite film material in a water environment Application of pre-enrichment and removal of phosphate in medium. Background technique [0002] The method of separating, grading, purifying and enriching two-component or multi-component solutes and solvents with natural or synthetic polymer films, driven by external energy or chemical potential difference, is collectively referred to as membrane separation method . Synthetic membranes can be divided into organic (polymer) membranes and inorganic membranes, where the most important membrane material is organic matter, that is, polymers or macromolecules. The choice of which polymer to use as a membrane material is not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/16
Inventor 王子健黄清辉柯润辉许宜平马梅
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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