Black Locust particle/polyvinyl formal composite filler and preparation method thereof

A polyvinyl formal and composite filler technology, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of affecting service life, significant degradation, and poor film-hanging performance and other problems, to achieve the effect of prolonging the service life, facilitating film formation, and short film formation time

Inactive Publication Date: 2013-09-04
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this scheme can adjust the sponge pore size, elasticity, strength, water absorption rate and water absorption rate and other performance indicators in a wide range, in the biological contact oxidation method, microorganisms have a significant degradation effect on paper fibers and corncobs, which will directly Affect the service life and other properties of the material
That is to say, the existing PVFM fillers have certain defects, such as poor film-hanging performance or short service life, which cannot fully meet the needs of the biological contact oxidation method for suspended fillers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Acacia particles / polyvinyl formal composite filler is a composite material based on polyvinyl formal foaming tissue and acacia particles as a dispersed phase; the acacia particles are peeled, boiled with alkali and crushed from natural acacia branches Formed and passed through a 100-mesh sieve; the weight ratio of acacia granules to polyvinyl alcohol is 25:100.

[0029] Its preparation method comprises the following steps:

[0030] 1) Add 100g of polyvinyl alcohol (PVA-2099) into 1000g of water, heat and stir the solvent;

[0031] 2) Cool down to 60°C, and then proceed as follows: add 5g sodium dodecylsulfonate, 25g acacia granules, stir at high speed (above 1700 r / min) for 30 minutes, add hydrochloric acid to adjust the pH value to 1.0; stir at low speed ( Add 80g of formaldehyde with a concentration of 37% at 200r / min), increase the stirring speed (above 1700r / min) after about 2min to make the system foam, and react until the volume no longer expands;

[0032] 3) Po...

Embodiment 2

[0036] Acacia particles / polyvinyl formal composite filler is a composite material based on polyvinyl formal foaming tissue, with acacia particles and inorganic active fillers as the dispersed phase; the acacia particles are made of natural acacia branches after peeling, Soda boiled and crushed, passed through 80-mesh sieve; the weight ratio of acacia granules and polyvinyl alcohol is 5:80.

[0037] Its preparation method comprises the following steps:

[0038] 1) Add 80g polyvinyl alcohol (PVA-1799) into 800g water, heat and stir to dissolve;

[0039] 2) Cool down to 80°C, then add 2g fatty acid polyoxyethylene ester, 5g acacia granules, 10g activated carbon, 20g fly ash, stir at high speed (above 1700 r / min) for 30 minutes, add sulfuric acid to adjust the pH value to 2.0; low speed Add 20g of 40% formaldehyde solution under stirring (200r / min), increase the stirring speed (above 1700 r / min) after about 5min, add 1.5g of potassium bicarbonate to make the system foam, and reac...

Embodiment 3

[0044] Acacia particles / polyvinyl formal composite filler is a composite material based on polyvinyl formal foaming tissue, with acacia particles and inorganic active fillers as the dispersed phase; the acacia particles are made of natural acacia branches after peeling, It is boiled with alkali and crushed, and passed through a 60-mesh sieve; the weight ratio of acacia granules to polyvinyl alcohol is 15:90.

[0045] Its preparation method comprises the following steps:

[0046] 1) Add 90g polyvinyl alcohol (PVA-2099) into 900g water, heat and stir to dissolve;

[0047] 2) Cool down to 40°C, then add 5g surfactant OP10, 15g acacia granules, 10g diatomaceous earth, stir at high speed (above 1700 r / min) for 30 minutes, add oxalic acid to adjust the pH value to 2.5; then stir at low speed ( Add 60g of formaldehyde solution with a concentration of 40% at 200r / min), increase the stirring speed (above 1700r / min) after about 2min, add 5g of ammonium bicarbonate to make the system fo...

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Abstract

The invention relates to a Black Locust particle/polyvinyl formal composite filler and a preparation method thereof, and belongs to the environmental engineering material field. The composite filler is obtained through compounding polyvinyl formal (PVFM) foam tissues as a matrix with a disperse phase; and the disperse phase comprises Black Locust particles having particle sizes of 60-120 meshes, and the Black Locust particles are obtained through peeling natural Black Locust particle branches, boiling in an alkali, and crushing. The preparation method of the composite filler comprises the following steps: dissolving polyvinyl alcohol in water, adding a surfactant and the Black Locust particles at 40-80DEG C, uniformly stirring, adding an acid for adjusting the pH value to 1-3, adding formaldehyde or paraformaldehyde, and carrying out high speed stirring while reacting for foaming the obtained system until the volume is not expanded; and dumping the obtained system to a foam die, and carrying out heat insulation curing at 50-65DEG C for 10-24h. The composite filler provided by the invention has the advantages of high biocompatibility, superior film hanging performance, and maintenance of many excellent characteristics of the PVFM, such as low density, high specific surface area, high poriness, good elasticity, wear resistance, corrosion resistance and the like.

Description

technical field [0001] The invention belongs to the field of environmental engineering materials, and in particular relates to a composite filler for a sewage treatment system, and also relates to a preparation method of the composite filler. Background technique [0002] With the development of society and the increase of population, the problem of water pollution is becoming more and more serious, and water resources are becoming more and more scarce. Sewage treatment has become a key research project. The biological contact oxidation method is one of the most commonly used sewage treatment methods at present. This method is derived from the biofilm method, that is, a certain amount of microbial carrier filler is filled in the biological contact oxidation tank, and the biofilm on the filler is used. The supplied oxygen, through biological oxidation, oxidizes and decomposes the organic matter in the wastewater, so as to achieve the purpose of purification. [0003] In the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 刘国际徐丽雒廷亮冯世敬高静王杏佳
Owner ZHENGZHOU UNIV
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