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Preparation method of zein based porous hydrophobic oil absorption material

A technology for corn gluten and oil-absorbing material, which is applied in separation methods, chemical instruments and methods, water pollutants, etc., and can solve problems such as difficulty in achieving separation

Inactive Publication Date: 2018-05-15
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above-mentioned natural oil-absorbing materials are oil-absorbing powders, which are difficult to separate. Most of the cellulose-based natural oil-absorbing materials also absorb water while absorbing oil.

Method used

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  • Preparation method of zein based porous hydrophobic oil absorption material
  • Preparation method of zein based porous hydrophobic oil absorption material
  • Preparation method of zein based porous hydrophobic oil absorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 0.8 g of zein in a round bottom flask, add 40 mL of NaOH solution with a concentration of 0.1 mol / L, and fully disperse the zein under stirring; Raise the temperature to 60°C, stir for 4 h, cool and stand for 50 min, freeze at low temperature and thaw at room temperature 5 times to obtain a columnar hydrogel.

[0037] At room temperature, the columnar hydrogel prepared above was dissolved in 50 mL of iron salt mixed aqueous solution (FeCl 2 ∙4H 2 O and FeCl 3 ∙6H 2 The molar ratio of O is 1:1) After soaking for 60 min, close the system, add 0.1mol / L NaOH solution to precipitate iron salt while stirring, continue stirring for 30 min, filter out the columnar gel, and rinse with distilled water until the eluate is Neutral, to obtain magnetic columnar zein-based hydrogels.

[0038] Soak the magnetic columnar zein-based hydrogel in KH570 ethanol-alcohol solution (concentration: 5%, v / v), shake it at room temperature for 3 hours, take it out, and dry it in vacuum at ...

Embodiment 2

[0041] Take 1 g of zein in a round bottom flask, add 30 mL of NaOH solution with a concentration of 1.0 mol / L, and fully disperse the zein under stirring; Raise the temperature to 70°C, stir for 3 h, cool and stand for 40 min, freeze at low temperature and thaw at room temperature 3 to 5 times to obtain a columnar hydrogel.

[0042] At room temperature, the columnar hydrogel prepared above was dissolved in 50 mL of iron salt mixed aqueous solution (FeCl 2 ∙4H 2 O and FeCl 3 ∙6H 2 The molar ratio of O is 1:2) after soaking for 20 min, close the system, add 1.0 mol / L NaOH solution to precipitate iron salt while stirring, continue stirring for 30 min, filter out the columnar gel, rinse with distilled water until the eluate is Neutral, to obtain magnetic columnar zein-based hydrogels.

[0043] Soak the magnetic columnar zein-based hydrogel in KH570 ethanol-alcohol solution (concentration: 10%, v / v), shake it at room temperature for 2 h, take it out, and dry it in vacuum at 50-...

Embodiment 3

[0046] Take 1.2 g of zein in a round bottom flask, add 45 mL of KOH solution with a concentration of 1.5 mol / L, and fully disperse the zein under stirring; Raise the temperature to 80°C, stir for 2 h, cool and stand for 30 min, freeze at low temperature and thaw at room temperature 3 to 5 times to obtain a columnar hydrogel.

[0047] At room temperature, the columnar hydrogel prepared above was dissolved in 50 mL of iron salt mixed aqueous solution (FeCl 2 ∙4H 2 O and FeCl 3 ∙6H 2 The molar ratio of O is 1:2.5) After soaking for 30 min, close the system, add 1.5 mol / L KOH solution to precipitate iron salt while stirring, continue stirring for 30 min, filter out the columnar gel, and rinse with distilled water until the eluate is Neutral, to obtain magnetic columnar zein-based hydrogels.

[0048] Soak the magnetic columnar zein-based hydrogel in KH570 methanol-alcohol solution (concentration: 15%, v / v), shake it at room temperature for 6 h, take it out, and dry it in vacuum...

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Abstract

The invention discloses preparation of a zein based porous hydrophobic oil absorption material. The preparation comprises the following steps: zein and polyvinyl alcohol are used as raw materials, physical crosslinking is carried out in order to obtain composite hydrogel, Fe2+ and Fe3+ are used as precipitating agents, and coprecipitation is used in order to generate magnetic iron oxide in a composite hydrogel high-molecular network for carrying out hydrophobic modification of the hydrogel; and then the hydrogel is immersed in an alcoholic solution of a silane coupling agent for carrying out lipophilic modification. The oil absorption material has good adsorptivity for petrochemical industry oil products, such as diesel oil, vacuum pump oil, n-hexane, chloroform and the like; the product has good adsorptivity for edible oil, such as rapeseed oil, and good selective adsorptivity for various oil products in an oil water mixture; the product can be applied to the fields of oil contamination treatment or oil and water separation.

Description

technical field [0001] The invention relates to a zein-based functional natural polymer material, in particular to a zein-based polymer material with hydrophobic and lipophilic surfaces and its preparation; the invention also relates to the zein-based polymer material as an oil-absorbing material The application in oil-water separation belongs to the field of special interface materials and functional natural polymer materials. Background technique [0002] In recent years, the discharge and leakage of petroleum products and organic solvents during petroleum exploration and transportation have caused catastrophic environmental pollution to aquatic ecology. To solve this challenge, the development of oil-water separation technology and oil-absorbing materials has attracted attention. According to the source, oil-absorbing materials can be divided into two categories: synthetic polymer oil-absorbing materials and natural polymer oil-absorbing materials. The disadvantage of m...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30B01D17/022C02F1/28C02F101/34
CPCB01D17/0202B01J20/24B01J20/28009B01J20/28047B01J20/28054C02F1/286C02F2101/34
Inventor 王荣民王建凤陈静王发伟何玉凤
Owner NORTHWEST NORMAL UNIVERSITY
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