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Super-hydrophobic CMF-TiO2-PDMS composite material, and preparation method and application thereof

A composite material, super-hydrophobic technology, applied in the field of super-hydrophobic CMF-TiO2-PDMS composite material and its preparation, can solve the problems of poor oil-soluble pollutants, easy decomposition, etc., to solve the problems of poor stability and good durability. Effect

Active Publication Date: 2020-05-19
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems that the materials in the prior art are easy to decompose under the action of light, and the effect of separating water-soluble and oil-soluble pollutants is not good, the present invention provides a superhydrophobic CMF-TiO 2 -Preparation method of PDMS composite material

Method used

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  • Super-hydrophobic CMF-TiO2-PDMS composite material, and preparation method and application thereof
  • Super-hydrophobic CMF-TiO2-PDMS composite material, and preparation method and application thereof
  • Super-hydrophobic CMF-TiO2-PDMS composite material, and preparation method and application thereof

Examples

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Embodiment 1

[0031] The preparation of embodiment 1 CMF

[0032] Commercial melamine foam (10cm x 6cm x 2cm) was put into a tube furnace and heated to 800°C under a nitrogen atmosphere with a heating rate controlled at 5°C / min. And heat treatment at 800 °C for 2 hours, then naturally cooled to room temperature to obtain carbonized CMF. The carbonized CMF is scanned by an electron microscope, and the scanning diagram is shown in figure 1 , figure 1 It is shown that the interior of CMF is composed of cross-linked porous structures with pore sizes ranging from tens of microns to hundreds of microns. This three-dimensional porous structure provides space for the adsorption of pollutants. The enlarged view shows that the surface of the CMF skeleton is very smooth.

Embodiment 2

[0033] Example 2 CMF-TiO 2 Preparation of composite materials

[0034] Take 40 parts of isopropanol, 10 parts of N-N dimethylformamide, and 5 parts of n-tetrabutyl titanate in a beaker, soak the CMF prepared in Example 1 in the above mixed solution, and transfer it to an autoclave, and put Put it into a high-temperature oven for hydrothermal reaction, the reaction condition is 180°C, and the time is 12h; then the product is taken out, washed with 50 parts of isopropanol, and dried in an oven at 80°C; finally, the above foam is put into a tube furnace Carry out high temperature treatment, the temperature is 450°C, the heating rate is 5°C / min, and the time is 2h. CMF-TiO 2 The composite material is scanned by electron microscope, and the scanning picture is shown in figure 2 , figure 2 As shown, the surface of CMF syntactic foam is evenly covered with a layer of TiO 2 Particles, TiO can be seen more clearly from its enlarged view 2 stacked on the CMF framework, indicatin...

Embodiment 3

[0035] Example 3 CMF-TiO 2 - Preparation of PDMS composites

[0036] Get 2 parts of PDMS, 0.2 part of curing agent PDMS prepolymer Sylgard 184, 20 parts of ethyl acetate in a beaker, the CMF-TiO prepared in Example 2 2 Soak in this solution for 1h, fully absorb, and finally put CMF-TiO 2 Take it out and put it into an oven at 120°C for 0.5h to get superhydrophobic CMF-TiO 2 - PDMS composite material. The superhydrophobic CMF-TiO 2 -PDMS composite material is scanned by electron microscope, the scanning picture is shown in image 3 , image 3 show that the TiO 2 The surface is coated with a layer of polymer, indicating that PDMS has been successfully modified to TiO 2 surface.

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Abstract

The invention belongs to the technical field of CMF-TiO2-PDMS composite materials, and discloses a super-hydrophobic CMF-TiO2-PDMS composite material, and a preparation method and application thereof.The preparation method comprises the following steps: loading amorphous TiO2 on a carbonized melamine material (CMF) skeleton and carrying out high-temperature treatment to obtain crystalline CMF-TiO2; and under the action of a curing agent, subjecting polydimethylsiloxane (PDMS) to cross-linking on the surface of the CMF-TiO2 through a thermocuring method to form a film, thereby obtaining the CMF-TiO2-PDMS composite material. The super-hydrophobic CMF-TiO2-PDMS composite material can adsorb water-soluble pollutants and oil-soluble pollutants and effectively overcome the defect of poor hydrophobic stability of a traditional photo-degradation catalytic material, and also shows good durability, stability and ultraviolet oxidation resistance.

Description

technical field [0001] The present invention relates to CMF-TiO 2 - PDMS composite technology field, especially related to superhydrophobic CMF-TiO 2 -PDMS composite material and its preparation method and application. Background technique [0002] With the rapid development of the chemical industry in recent decades, chemical reagent leakage, industrial wastewater discharge and crude oil leakage accidents have occurred frequently, which not only poses a huge threat to the human environment, but also causes catastrophic damage to the entire natural environment. Therefore, it has become a difficult problem for all mankind to control and remove organic pollutants in water bodies and prevent further deterioration of water quality. [0003] At present, most organic pollutants can be divided into two categories according to their polarity: water-soluble organic pollutants and oil-soluble organic pollutants. For oil-soluble organic pollutants, the characteristic of immiscibilit...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J31/06B01J35/10C02F1/32C02F101/30
CPCB01J31/38B01J31/069B01J37/08C02F1/32C02F2305/10C02F2101/30B01J35/60B01J35/39
Inventor 朱海光刘勇袁勋
Owner QINGDAO UNIV OF SCI & TECH
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