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Multi-adsorption biodegradable foam with oil-water separation function

A technology for oil-water separation and adsorption of water, applied in the direction of adsorption of water/sewage treatment, separation methods, water pollutants, etc., can solve the problems of non-biodegradable, single function, and difficult recovery of adsorption materials

Active Publication Date: 2021-09-07
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems that the existing dye adsorption materials are difficult to recycle, have single function and are not biodegradable, and provide a biodegradable foam with multi-adsorption and oil-water separation function

Method used

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  • Multi-adsorption biodegradable foam with oil-water separation function
  • Multi-adsorption biodegradable foam with oil-water separation function
  • Multi-adsorption biodegradable foam with oil-water separation function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of iron pillared bentonite: Dissolve 16.16g of ferric nitrate nonahydrate and 2.12g of sodium carbonate in 100mL of deionized water respectively, and then slowly dissolve sodium carbonate at a rate of 1mL / min under stirring in a water bath at 80°C. The solution was added dropwise into the ferric nitrate solution, stirred for 2 hours, placed at room temperature, and left to stand for 72 hours to obtain an iron pillar liquid; prepare 400 mL of bentonite deionized water dispersion with a mass fraction of 2%, and let the bentonite swell in deionized water for 12 hours After the iron pillar solution and the bentonite dispersion after swelling are all prepared, under stirring in a water bath at 80°C, slowly pour the iron pillar solution into the bentonite dispersion and continue to stir for 24 hours, then place the iron pillar product in Centrifuge in a centrifuge, discard the supernatant, continue to wash the bottom material with deionized water, and repeat th...

Embodiment 2

[0052] (1) Preparation of iron-pillared bentonite: same as step (1) of Example 1.

[0053] (2) Preparation of PBAT open-cell foam doped with 30wt% iron pillared bentonite: first 0.822g PBAT was completely dissolved in 5mL chloroform, then slowly added dropwise 4mL n-hexane in the process of rapid stirring, and the solution was When the phase separation occurs when it turns transparent to milky white, add 0.246g iron pillared bentonite, stir well, add sugar to fill the phase separation liquid, let it stand at room temperature for 12 hours, and then replace it with absolute ethanol three times. After the solvent is completely evaporated, use 60 ℃ water for several times to wash away the sugar inside the foam, that is, to obtain a PBAT open-cell foam doped with 30 wt% iron pillared bentonite.

[0054] (3) Surface treatment of PBAT open-cell foam doped with iron-pillared bentonite: same as step (3) of Example 1.

Embodiment 3

[0056] (1) Preparation of iron-pillared bentonite: same as step (1) of Example 1.

[0057] (2) Preparation of PBAT open-cell foam doped with 10wt% iron pillared bentonite: first 0.822g PBAT was completely dissolved in 5mL chloroform, then slowly added dropwise 4mL n-hexane in the process of rapid stirring, and the solution was When the phase separation occurs when it turns transparent to milky white, add 0.082g iron pillared bentonite, stir well, add sugar to fill the phase separation liquid, let it stand at room temperature for 12 hours, and then replace it with absolute ethanol three times. After the solvent is completely evaporated, use 60 ℃ water for several times to wash away the sugar inside the foam, that is, to obtain the PBAT open-cell foam doped with 10 wt% iron pillared bentonite.

[0058] (3) Surface treatment of PBAT open-cell foam doped with iron-pillared bentonite: same as step (3) of Example 1.

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Abstract

The invention provides a multi-adsorption biodegradable foam with an oil-water separation function, which is characterized in that iron-pillared cationic layered silicate clay is used as an adsorbent, the adsorbent is doped into a sugar-added PBAT phase separation liquid to obtain iron-pillared cationic silicate clay-doped PBAT open-cell foam, and then the surface of the foam is coated with a PAM / SiO2 hydrophilic coating to obtain the super-hydrophilic open-cell foam is obtained. The foam material is hydrophilic and oleophobic, is light in weight, can remove methylene blue, copper ions and other cationic water pollutants in water, has a light degradation reaction due to the existence of iron ions, can be subjected to light degradation after adsorption, has a good cyclic adsorption function, can be repeatedly used, and is biodegradable. And when the adsorption capacity is lost, the foam is easy to degrade, does not pollute the environment and has wide use value.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a biodegradable foam capable of adsorbing dyes and heavy metal ions and having the function of separating oil and water. [0002] technical background [0003] While industrialization has brought convenience to our lives, it has also brought serious harm to the environment, among which water pollution is the most obvious, while dyes and heavy metal ions are the most common toxic and harmful substances in wastewater. Most of the water pollutants containing dyes, heavy metal ions and oils are toxic and non-biodegradable, and their wanton discharge will harm animals and plants, and also pose a threat to human health through bioaccumulation. Today, there are many methods to remove pollutants from water. [0004] Patent CN108855233A discloses a microfluidic method capable of photodegrading dyes to prepare copper-loaded nano-titanium dioxide chitosan composite microspheres....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D17/02C02F1/40C02F1/28C02F101/20C02F101/30
CPCB01J20/10B01J20/103B01J20/261B01J20/12B01J20/264B01J20/28014C02F1/28C02F1/40B01D17/02B01D17/0202C02F2101/20C02F2101/308
Inventor 张殿奇张振秀邱丽雁张昕孙晨曦田翔远
Owner QINGDAO UNIV OF SCI & TECH
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