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

A technology of cellulose acetate and iron oxide, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as difficulty in separating error resin particles and soil particles, and achieve leakage prevention, convenient preparation, and easy realization. Effect

Inactive Publication Date: 2007-04-11
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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, iron oxide particles are embedded in the membrane As a phosphorus "sink" method, the filled iron oxide particles are evenly distributed in the framework of the membrane structure material; and the application of the prepared cellulose acetate / iron oxide composite membrane material in the removal or enrichment analysis of active phosphate in water

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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Effect test

Embodiment 1

[0029] A cellulose acetate-iron oxide composite membrane was prepared, and its composition (in mass percentage) was: 93.7% of cellulose acetate, 6.3% of iron oxide (in Fe 2 O 3 count).

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

[0031] (1) The experimental film formula is as follows: 18 g of cellulose diacetate; 10 g of dioxane; 70 g of acetone; 2 g of magnesium perchlorate; 3 ·6H 2 0); The said material is mixed in the triangular flask with the ground stopper to prepare the casting liquid;

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

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Embodiment 2

[0038] Another cellulose acetate-iron oxide composite membrane was prepared, and its composition (in mass percentage) was: 97.5% cellulose acetate, 2.5% iron oxide (in Fe 2 O 3 count).

[0039] The preparation method of the composite membrane is as follows: the formula of the composite membrane is as follows: 22 g of cellulose diacetate; 6 g of dioxane; 68 g of acetone; 2 g of magnesium perchlorate, ferric chloride (FeCl 3 ·6H 2 0) 2g; the operation steps are the same as those in Example 1, except that the step (2) homogenize the casting solution: the temperature is kept at about 35°C; Evaporate and dry for 60 seconds in an oven at 35 °C; immerse the prepared film liquid layer together with the scraper in 1% ammonia water, keep the temperature at 20 °C ~ 25 °C, and soak for 7-10 minutes to promote the iron oxide particles in formed in the film, and a cellulose acetate / iron oxide composite film was obtained at this time. The basic physicochemical properties of the resulting...

Embodiment 3

[0041] Then prepare a cellulose acetate-iron oxide composite membrane, and its composition (in terms of mass percentage) is: 87% of cellulose acetate, 13% of iron oxide (in terms of Fe 2 O 3 count). The experimental film formula is as follows: cellulose diacetate 16g; dioxane 10g; acetone 70g; ferric chloride (FeCl 3 ·6H 2 0) 8g; Operation steps are the same as in Example 1. Most of the physical and chemical properties of the obtained film are similar to those of the film prepared 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 artificial synthetic polymer film for environmental monitoring and pollution control and a preparation method, in particular to a cellulose acetate / iron oxide composite membrane material and a preparation method, and the phosphoric acid of the above-mentioned composite membrane material in a water environment Applications for pre-concentration and removal of salts. Background technique [0002] A method of separating, grading, purifying and enriching two-component or multi-component solutes and solvents using natural or artificially synthesized polymer films, driven by external energy or chemical potential difference, collectively referred to as membrane separation methods . Synthetic membranes can be divided into organic (polymer) membranes and inorganic membranes, of which the most important membrane materials are organics, ie polymers or macromolecules. The choice of which polymer is used as the membrane material is not...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/16B01D69/12
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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