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Super-hydrophilic and underwater super-oleophobic material as well as preparation method and application thereof

A super-hydrophilic and oleophobic technology, applied in separation methods, general water supply saving, chemical instruments and methods, etc., can solve the problems of secondary pollution of fluorine water, and achieve strong anti-fouling ability, low adhesion, and preparation simple method effect

Active Publication Date: 2021-04-20
苏州博睿特环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the super-oleophobic interface of this type of oil removal material is highly dependent on the modification of fluorinated materials, but the introduced fluorine can easily cause secondary pollution of water bodies

Method used

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  • Super-hydrophilic and underwater super-oleophobic material as well as preparation method and application thereof
  • Super-hydrophilic and underwater super-oleophobic material as well as preparation method and application thereof
  • Super-hydrophilic and underwater super-oleophobic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Put 2g SiO 2 Mesoporous nanomaterials (40 meshes) were soaked in 60 ml of 2% hydrochloric acid for 6 hours to be acidified and hydrolyzed.

[0033] 2. Dissolve 5 g of chitosan oligosaccharide in 100 ml of deionized water, and stir for 6 hours to obtain chitosan oligosaccharide solution.

[0034] 3. The acidified SiO 2 The mesoporous nanomaterials were added to the above oligochitosaccharide solution, stirred at room temperature for 5 hours, and the excess oligochitosaccharide solution was removed by suction filtration.

[0035] 4. Add 30ml of 1M dehydrated dulcitol (solvent used: DMF), and reflux at 80°C for 5 hours.

[0036] 5. The excess mixed solution was removed by filtration, the product was washed 3 times with absolute ethanol, and dried in an oven at 60°C.

Embodiment 2

[0038] 1. Put 4g SiO 2 Mesoporous nanomaterials (100 meshes) were soaked in 80 ml of 6% acetic acid for 8 hours to be acidified and hydrolyzed.

[0039] 2. Dissolve 7g chitosan oligosaccharide in 150ml deionized water and stir for 6 hours.

[0040] 3. The acidified SiO 2 The mesoporous nanomaterials were added into the above oligochitosaccharide solution, stirred at room temperature for 6 hours, and excess chitooligosaccharide solution was removed by suction filtration.

[0041] 4. Add 80ml of 1.5M dehydrated dulcitol (solvent used: DMSO) to it, and reflux at 130°C for 6 hours.

[0042] 5. Filter to remove excess mixed solution, wash the product 4 times with deionized water, and put it into an oven to dry at 80°C.

Embodiment 3

[0044] 1. Put 4g SiO 2 The mesoporous nanomaterials were soaked in 80ml 8% oxalic acid for 12 hours to acidify and hydrolyze them.

[0045] 2. Dissolve 4g chitosan oligosaccharide in 100ml deionized water and stir for 6 hours.

[0046] 3. The acidified SiO 2 The mesoporous nanomaterials were added into the above oligochitosaccharide solution, stirred at room temperature for 5 hours, and the excess oligochitosaccharide solution was removed by suction filtration.

[0047] 4. Add 50ml of 0.9M anhydrous dulcitol (solvent used: ethanol), and reflux at 100°C for 5 hours.

[0048] 5. The excess mixed solution was removed by filtration, the product was washed 3 times with absolute ethanol, and dried in an oven at 50°C.

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Abstract

The invention discloses a super-hydrophilic and underwater super-oleophobic material as well as a preparation method and application thereof. The preparation method of the material comprises the following steps: acidifying a mesoporous SiO2 nano material by adopting acid liquor; mixing the acidified mesoporous SiO2 nano material with a chitosan oligosaccharide solution, and stirring to react, so as to obtain a chitosan oligosaccharide coupled mesoporous SiO2 nano material; mixing the chitosan oligosaccharide coupled mesoporous SiO2 nano material with dianhydrodulcitol in an organic solvent, and refluxing at 80-130 DEG C for 5-10 hours; and after the reaction is finished, collecting and purifying a product to obtain the super-hydrophilic and underwater super-oleophobic material. The super-hydrophilic and underwater super-oleophobic material can be used for oil-water separation, and can improve the oil / water separation efficiency.

Description

technical field [0001] The invention relates to the technical field of oil-water separation materials, in particular to a superhydrophilic and underwater superoleophobic material and its preparation method and application. Background technique [0002] In recent years, driven by environmental and economic needs, the production of industrial oily wastewater has increased significantly, so materials that can effectively separate oil and water are urgently needed. Oil / water separation has been a global challenge, and designing novel materials with special wettability is an effective and facile approach. But current so-called "oil-removing" material types such as kapok, carbon-based materials, hydrophobic aerogels, polytetrafluoroethylene (PTFE)-coated mesh, polydimethylsiloxane (PDMS)-coated nanowires Membranes, nanoporous polydivinylbenzene materials, cross-linked oil-absorbing polymer gels, etc., are not suitable for gravity-driven separation due to their inherent lipophilic...

Claims

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Application Information

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IPC IPC(8): C08G83/00C01B33/18B01D17/022
CPCY02A20/204
Inventor 蔡建国石洪雁刘锐
Owner 苏州博睿特环保科技有限公司
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