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Porous adsorption film and preparation method thereof

A porous adsorption and colloid technology, applied in the polymer field, can solve the problems of water body being unable to drink normally, water body eutrophication, water quality corruption, etc., and achieve the effect of low price, large adsorption capacity and good effect.

Inactive Publication Date: 2015-04-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive copper-containing wastewater will cause various environmental and safety problems: when the copper content in the water reaches 0.01mg / L, it will inhibit the self-purification of the water body; when it reaches 3.0mg / L, it will cause the water body to produce peculiar smell; , the water cannot be drunk normally
[0003] In addition, organic wastewater, such as printing and dyeing wastewater, also accounts for a large proportion of industrial wastewater in our country. The discharge of a large amount of organic wastewater can easily cause water corruption and lead to Environmental issues such as water eutrophication
[0004]However, at present, many industrial wastewaters often contain both heavy metals and organic matter, so a single adsorbent for a certain wastewater can no longer meet the requirements, which urgently requires us to develop A new material that can adsorb both heavy metal ions and organic matter

Method used

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  • Porous adsorption film and preparation method thereof
  • Porous adsorption film and preparation method thereof
  • Porous adsorption film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] 1) Preparation of chitosan sol: 1kg of chitosan was added to 100L of 2% acetic acid solution and stirred evenly to obtain chitosan sol;

[0036] 2) Preparation of β-cyclodextrin polymer: take 15kg of β-cyclodextrin polymer to crosslink with 4kg of sodium citrate, add 0.5kg of sodium dihydrogen phosphate dihydrate as a catalyst, heat for reaction for 5 hours, and dry, Can be obtained by washing and filtration;

[0037] 3) Preparation of dioxide peptide colloid: Mix 0.4L of tetrabutyl titanate and 1L of absolute ethanol to obtain mixed solution A; mix 25ml of absolute ethanol with 2ml of distilled water and 1ml of glacial acetic acid to obtain mixed solution B; drop the mixed solution B dropwise Add to the mixed liquid A, the volume ratio of the mixed liquid A and the mixed liquid B is 1:0.01, and stir to obtain the dioxide peptide colloid.

[0038] 4) Add 5kg of β-cyclodextrin polymer, 0.25L of vinyl triethoxysilane, 1kg of polyethylene glycol-20000, and 0.05L of titanium dio...

Embodiment 2

[0041] 1) Preparation of chitosan sol: take 10kg of chitosan and add it to 100L of 10% acetic acid solution, and stir evenly to obtain chitosan sol;

[0042] 2) Preparation of β-cyclodextrin polymer: take 20kg of β-cyclodextrin polymer to crosslink with 4kg of sodium citrate, add 0.5kg of sodium dihydrogen phosphate dihydrate as a catalyst, heat for reaction for 24 hours, and dry, Can be obtained by washing and filtration;

[0043] 3) Preparation of dioxide peptide colloid: mix 0.5L of tetrabutyl titanate and 0.5L of absolute ethanol to obtain mixed solution A; mix 50ml of absolute ethanol with 2ml of distilled water and 1ml of glacial acetic acid to obtain mixed solution B; Add dropwise to the mixture A, the volume ratio of the mixture A and the mixture B is 1:0.05, and stir to obtain the dioxide peptide colloid.

[0044] 4) Add 20kg of β-cyclodextrin polymer, 5kg of polyethylene glycol-20000, 0.5L of vinyl triethoxysilane, and 1L of titanium dioxide colloid to 100L of chitosan sol...

Embodiment 3

[0047] 1) Preparation of chitosan sol: prepare chitosan sol: take 5kg of chitosan and add it to 100L of 6% acetic acid solution, and stir evenly to obtain chitosan sol;

[0048] 2) Preparation of β-cyclodextrin polymer: take 17.5kg of β-cyclodextrin polymer to crosslink with 4kg of sodium citrate, add 0.5kg of sodium dihydrogen phosphate dihydrate as a catalyst, heat for 15 hours and dry , Washing, suction filtration available;

[0049] 3) Preparation of dioxide peptide colloid: Take 0.35L of tetrabutyl titanate and 0.5L of absolute ethanol and mix to obtain mixed solution A; mix 37.5ml of absolute ethanol with 2ml of distilled water and 1ml of glacial acetic acid to obtain mixed solution B; Add dropwise to the mixture A, the volume ratio of the mixture A and the mixture B is 1:0.03, and stir to obtain the dioxide peptide colloid.

[0050] 4) Add 12.5kg of β-cyclodextrin polymer, 3kg of polyethylene glycol-20000, 0.375L of vinyl triethoxysilane, and 0.5L of titanium dioxide colloid ...

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Abstract

The invention discloses a porous adsorption film and belongs to the field of macromolecules. The porous adsorption film is prepared from chitosan sol, a beta-cyclodextrin polymer, polyethylene glycol-20000, a silane coupling agent and titanium dioxide colloid according to a certain ratio, wherein the beta-cyclodextrin polymer is formed by crossly linking beta-cyclodextrin and sodium citrate; the chitosan sol is formed by adding chitosan into acetic acid and stirring; and the titanium dioxide colloid is prepared from tetrabutyl titanate, absolute ethyl alcohol, distilled water and glacial acetic acid. The porous film can adsorb heavy metal ions and also can adsorb organic matters. The invention further discloses a preparation method of the porous adsorption film.

Description

technical field [0001] The invention relates to a porous adsorption film and a preparation method thereof, belonging to the field of macromolecules. Background technique [0002] Heavy metal wastewater is unavoidable in the process of industrial and mining production. Very low concentrations of heavy metals in the environment can cause serious consequences, destroying the self-purification of water bodies, enriching in organisms, breaking ecological balance, and endangering human health. For example, copper is an essential chemical element for the human body. However, when it exceeds a certain concentration in water, the water source will be polluted. It mainly comes from metal processing, electroplating, mineral mining, smelting, etc., and can reach dozens of milligrams per liter. Excessive copper-containing wastewater will cause various environmental and safety problems: when the copper content in the water reaches 0.01mg / L, it will inhibit the self-purification of the wa...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/26B01J20/267B01J20/28033B01J20/3085B01J2220/46
Inventor 何娉婷薛建军王玲吴宁赵媛杨婷婷沈东周兵孙瑶王婷婷王璨冒韵
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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