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Super-oleophilicity hydrophobic material and preparation method and application thereof

A hydrophobic material and hydrophobic technology, applied in the field of materials, can solve the problems of large raw material pollution, secondary pollution, and metal content, and achieve the effects of simple preparation process, good tolerance, and low energy consumption

Active Publication Date: 2017-05-10
RENMIN UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods have the disadvantages of large pollution of raw materials, high cost, and metal content, and the method of physical blending is also unstable and easy to fall off.
Therefore, secondary pollution is caused on the basis of dissolution

Method used

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  • Super-oleophilicity hydrophobic material and preparation method and application thereof
  • Super-oleophilicity hydrophobic material and preparation method and application thereof
  • Super-oleophilicity hydrophobic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] 1. Dissolving and activating microcrystalline cellulose (MCC) with carbon dioxide-based reversible ionic liquid: First, add 0.08g of MCC powder to 1mL containing 1,8-diazabicycloundec-7-ene (DBU) and Dimethyl sulfoxide (DMSO) mixed solution (the mass ratio of the mixed solution is 10:90), and then the solution was transferred to a reaction kettle, and the reaction kettle was placed in a constant temperature water bath at 40°C. After that, introduce 0.2MPa CO 2 The gas is sealed, and the activation reaction is carried out by stirring for 1 hour to obtain a light yellow transparent solution, that is, a cellulose solution.

[0074] 2. Preparation of silane hydrolyzate: prepare 30ml of tetraethoxysilane (TEOS) ethanol solution (2:3 by volume), 30ml of ammonia water and ethanol solution (1:1 by volume), and mix them in a certain proportion to make TEOS at room temperature After the polycondensation reaction occurred for 10 minutes, 5 ml of hydrochloric acid solution (concen...

Embodiment 2

[0080] The difference between this example and Example 1 is that the reversible ionic liquid DBU described in step 1 can be replaced by tetramethylguanidine (TMG). Others are the same as in Embodiment 1.

[0081] The structural formula of tetramethylguanidine (TMG) is as follows:

[0082]

Embodiment 3

[0084] This embodiment is different from embodiment 1 in that: the washing solvent described in step 4 is replaced by methanol or ethanol. Others are the same as in Embodiment 1.

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Abstract

The invention discloses a super-oleophilicity hydrophobic material and a preparation method and application thereof. The preparation method for the hydrophobic material comprises the following steps: I, dissolving and activating microcrystalline cellulose by carbon-dioxide-based reversible ion liquid; II, preparing silane hydrolysate; III, adding cellulose solution to the hydrolysate, modifying the cellulose under the catalysis of ion liquid; IV, filtering, washing and drying the product, repeatedly using the solvent; and V, grinding solid and dispersing in ethanol solution. The dispersion liquid is sprayed to filter paper for oil-water filtering separation, the separation efficiency is more than 95%, and the organic pollutant in the water can be adsorbed. The normal sponge is soaked in the dispersion liquid for adsorbing the oil in the water. The surface contact angel of the filter paper prepared by the method is 165 degrees, and the rolling angle is smaller than 3 degrees. The whole raw material is green and environmental, and the preparation process is simple and efficient.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a super-oleophilic and hydrophobic material and its preparation method and application. Background technique [0002] Biomass is the main carbon energy after fossil energy, and its biodegradability and biocompatibility are not available in other energy sources, so it has attracted widespread attention. As one of the most abundant natural organic components, cellulose has been extensively studied and applied in many fields. The preparation of hydrophobic cellulose materials based on cellulose is one of the research directions. The hydrophobic cellulose materials reported so far have good hydrophobic effects, and most of them can reach a contact angle of more than 150°; Environmental pollution, high energy consumption and other issues. [0003] The preparation of cellulose materials usually requires dissolving cellulose. The existing dissolving methods include: sulfuric acid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/09C09D101/08C08B15/05B01J20/26B01J20/28C02F101/34
CPCB01J20/26B01J20/28047C02F1/285C02F2101/34C08B15/05C08J3/091C08J2301/08C09D101/08
Inventor 牟天成王晋芳
Owner RENMIN UNIVERSITY OF CHINA
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