A kind of preparation method of flame-retardant superhydrophobic melamine sponge

A technology of water melamine sponge and melamine sponge, which is applied in the field of preparation of flame-retardant superhydrophobic melamine sponge, can solve problems such as poor flame retardancy, limited use of materials, and complicated construction process of superhydrophobic and lipophilic surfaces, and achieves easy preparation of raw materials The effect of obtaining and preparation conditions is simple and mild

Active Publication Date: 2021-02-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And it has received widespread attention. However, most hydrophobic porous materials face problems mainly including: the superhydrophobic and lipophilic surface construction process is complicated, and the flame retardancy is poor, which limits the use of these materials in practical applications.

Method used

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  • A kind of preparation method of flame-retardant superhydrophobic melamine sponge
  • A kind of preparation method of flame-retardant superhydrophobic melamine sponge
  • A kind of preparation method of flame-retardant superhydrophobic melamine sponge

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: the preparation of flame-retardant superhydrophobic melamine sponge, the steps are as follows:

[0021] Step 1, the modified treatment of melamine sponge is the same as the preparation process of comparative example 1;

[0022] Step 2: Put the four melamine sponges modified in Comparative Example 1 into 30 mL ethanol solution, and add 30 μL of 1H, 1H, 2H, 2H-perfluorododecanethiol solution to the ethanol solution (i.e. The volume ratio of the melamine sponge to the ethanol solution containing 1H, 1H, 2H, 2H-perfluorododecanethiol is 2:15), stirred for 12 hours, took out the melamine sponge, washed 3 times with ethanol, dried, and finally obtained super Hydrophobic melamine sponge.

[0023] figure 2 Among (a) shows the SEM picture of the melamine sponge before modification, (b) shows the SEM picture of the superhydrophobic melamine sponge finally prepared by embodiment 1, image 3 It is the water contact angle (CA) photo of the superhydrophobic melamine...

Embodiment 2

[0024] Example 2: Preparation of flame-retardant superhydrophobic melamine sponge, the preparation steps of this example 2 are basically the same as those of Example 1, the difference is only: in step 2, the added 1H, 1H, 2H, 2H-perfluorodeca The dioxanethiol solution was changed from 30 μL to 60 μL. Figure 4 It is the water contact angle (CA) photo of the superhydrophobic melamine sponge prepared in embodiment 2. After modification with 1H,1H,2H,2H-perfluorododecanethiol, the surface energy of the melamine sponge was reduced. When the low surface energy substance concentration increased, that is, when the volume ratio of 1H, 1H, 2H, 2H-perfluorododecanethiol solution to ethanol solution was 1:500, compared with the water contact angle in Example 1, there was The water contact angle at this time is 160.74°.

Embodiment 3

[0025] Example 3: The preparation of flame-retardant superhydrophobic melamine sponge, the steps of this example 3 are basically the same as those of Example 1, the difference is only: in step 2, the 1H, 1H, 2H, 2H-perfluorododecane added Thiol solution was changed from 30 μL to 6 μL. Figure 5 It is the water contact angle (CA) photo of the superhydrophobic melamine sponge prepared in embodiment 3. When the concentration of low surface energy substances decreased, the water contact angle of the superhydrophobic melamine sponge also decreased. When the volume ratio of 1H, 1H, 2H, 2H-perfluorododecanethiol solution and ethanol solution was 1:5000, Compared with Example 2, the water contact angle decreased, and now the water contact angle was 152.22°.

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Abstract

The invention discloses a preparation method for a flame retardant super-hydrophobic melamine sponge. The method comprises the steps that firstly silicon dioxide particles are put into a trismetyl aminomethane buffer solution with a pH value of 7.8, ultrasound treatment is carried out for 20-60 minutes, standing is carried out for 15 minutes at the indoor temperature, and then a gallotannic acid solution and a silver nitrate solution are added in sequence to obtain a mixed solution; a melamine sponge is immersed in the mixed solution, taken out after the mixed solution is stirred for 2 hours at the indoor temperature, and washed by deionized water and ethyl alcohol for several times to obtain a melamine sponge of which the surface has a micro-nano structure; finally, the melamine sponge isput into an ethyl alcohol solution which has volume concentration of 1:500-10000 and contains 1H, 1H, 2H, 2H-perfluorododecane mercaptan, stirring is carried out for 12 hours at the indoor temperature, the melamine sponge is taken out, washed by ethyl alcohol for several times and dried to obtain the super-hydrophobic melamine sponge of which water contact angle is larger than or equal to 145 degrees. The preparation method for the flame retardant super-hydrophobic melamine sponge has the advantages that the preparation process is simple and convenient, the conditions are mild, and the adjustment and control of hydrophobic performance of the super-hydrophobic melamine sponge can be achieved by changing the concentration of a 1H, 1H, 2H, 2H-perfluorododecane mercaptan solution during the preparation.

Description

technical field [0001] The invention relates to a preparation method of a superhydrophobic sponge for oil-water separation, which belongs to the preparation technology of nanocomposite materials. Background technique [0002] Petroleum is one of the three major energy resources in the world, but frequent oil spills and industrial discharge of organic solvents during petroleum refining / processing have brought serious damage or even crisis to the environment. The application of oil-absorbing materials in the field of oil-water separation can successfully achieve highly selective separation of oil and water, which not only purifies water resources, but also reuses recovered oil products. [0003] The three-dimensional network structure superhydrophobic material based on commercial sponge is an efficient oil-water separation material, which is cheap, easy to mass-produce, has the advantages of large volume and porosity, large specific surface area and pores, etc. So that it has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08L61/28
CPCC08J9/40C08J2361/28
Inventor 石家福田雨姜忠义李蔚然
Owner TIANJIN UNIV
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