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Hydrophilic-oleophobic material, and preparation method and application thereof

An oleophobic and hydrophilic technology, used in separation methods, chemical instruments and methods, grease/oily substances/floating matter removal devices, etc. question

Active Publication Date: 2016-10-12
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adsorption materials can usually be divided into inorganic materials, natural polymer materials and organic polymer materials. Inorganic materials such as activated carbon, expanded graphite, peat, silica, organically modified clay, etc., are difficult to recover after oil absorption due to their low oil absorption rate. At present, it has been rarely used; natural polymer materials such as flax, cotton, milkweed, straw and wool and other porous materials are limited in application due to the disadvantages of complex composition, difficulty in modification, low material strength and inability to be reused.

Method used

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  • Hydrophilic-oleophobic material, and preparation method and application thereof
  • Hydrophilic-oleophobic material, and preparation method and application thereof
  • Hydrophilic-oleophobic material, and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0035] In some more specific embodiments, the preparation method includes the following steps:

[0036] Step 1: providing a porous material containing a hydrophilic group;

[0037] Step 2: cutting the porous material into the desired size, soaking it in a solvent and performing ultrasonic cleaning to remove stains and grease in the porous material, and then fully drying in a drying oven to remove moisture in the porous material;

[0038] Step 3: Dissolving the fluorocarbon surfactant containing amino groups, hydroxyl groups, carboxyl groups, fluorocarbon bonds, and alkyl chains in an organic solvent, and adding the porous material obtained in step 2 to the above solution under a certain reaction atmosphere, Mix evenly, react at a certain temperature and time, and bond the hydrophilic group contained in the hydrophilic porous material with the polar group of the fluorocarbon surfactant. After the reaction is completed, remove the excess solution and use an organic solvent, deio...

Embodiment 1

[0060] Example 1 The hydrophilic-oleophobic material in this example uses the same porous cellulose material as in Comparative Example 1 as the substrate, and after grafting C-F long chains containing hydrophilic amino groups and oleophobic properties on the substrate form. The C-F long chain is to react the cellulose porous material with a compound containing diisocyanate groups first, and then react with a fluorocarbon surfactant containing a hydroxyl group and a C-F long chain, so that the porous material and the fluorocarbon surfactant The hydroxyl groups of each group are chemically bonded with the -NCO functional group respectively, so that the C-F long chain is grafted on the surface of the porous material.

[0061] Specifically, the preparation process of the hydrophilic-oleophobic material comprises the following steps:

[0062] (1) Referring to Comparative Example 1, the cellulose porous material was cleaned and dried.

[0063] (2) Calculate the hydroxyl molar mass...

Embodiment 2

[0078] Example 2 The porous fabric material used in the preparation method of the hydrophilic-oleophobic fabric porous material in this example is basically the same as that in Comparative Example 2. This preparation method comprises the steps:

[0079] (1) Clean and dry the porous fabric material, specifically: cut the porous fabric material into the required size, soak it in a solution of deionized water and acetone, and perform ultrasonic cleaning for 30 minutes to remove the impurities in the porous material. Stains and grease, and then dried in a drying oven at 80°C;

[0080] (2) Calculate the hydroxyl molar mass of the fabric porous material, measure hexamethylene diisocyanate, 0.02g of dibutyltin dilaurate and 100ml of anhydrous toluene with twice the hydroxyl molar mass, and mix them evenly. After the treatment in step (1), Add the fabric porous material into it, seal it, pass nitrogen gas, react at 40°C for 6 hours, remove excess solution, and wash with anhydrous tol...

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Abstract

The invention discloses a hydrophilic-oleophobic material, and a preparation method and an application thereof. The hydrophilic-oleophobic material comprises a hydrophilic porous material used as a matrix, and the matrix is grafted with hydrophilic-oleophobic molecules. Hydrophilic groups contained in the hydrophilic porous material and polar groups contained in the hydrophilic-oleophobic molecules undergo a bonding reaction to make the matrix be grafted with the hydrophilic-oleophobic molecules. The hydrophilic-oleophobic material has hydrophilic and oleophobic properties in air, has underwater super oleophobic property, can effectively treat stable emulsified oil sewage, and has the advantages of self cleaning, pollution resistance and long life, so the hydrophilic-oleophobic material is a good oil-water separation material, and has wide application prospect in the field of oil-water separation and filtration treatment of organic sewage generated in the industry and life. The preparation method of the hydrophilic-oleophobic material has the advantages of simplicity, cheap and renewable raw materials, and commercial promotion facilitation.

Description

technical field [0001] The invention specifically relates to a hydrophilic-oleophobic material capable of efficiently separating oil-water emulsions, its preparation method, and its application in the oil-water separation and filtration treatment of organic sewage produced in industry and life, and belongs to the technical field of functional materials. Background technique [0002] In recent years, with the prosperity and development of modern industry, the number of organic pollutants produced by petroleum, printing and dyeing, chemical industry, agriculture and human daily life has increased rapidly. These organic pollutants have entered the water cycle system without reasonable treatment, causing serious damage to water resources. pollution, and the amount of these pollutants has far exceeded the self-purification ability of the natural environment, which has threatened the safety of human drinking water. [0003] The treatment of water pollution has become one of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022C02F1/40
CPCB01D17/02B01D17/0202C02F1/40
Inventor 曾志翔陈军君王刚王立平薛群基
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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