Preparation method of porous adsorption material

A technology of porous adsorption materials and porogens, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., and can solve problems such as the need to improve adsorption

Active Publication Date: 2016-04-20
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the adsorption of existing polydimethylsiloxane materials still needs to be improved, and it needs to be modified

Method used

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  • Preparation method of porous adsorption material
  • Preparation method of porous adsorption material
  • Preparation method of porous adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Accurately weigh 5.0g Sylgard-184A, 0.5g Sylgard-184B, 4.125g carbon tetrachloride, 4.125g n-octane and stir well. Drop by drop into 50 mL of saturated sodium bicarbonate solution with a syringe. The stirring speed is 150r / min, and the stirring temperature is 80°C. After stirring for 2 hours, the material was taken out, soaked in concentrated HCl solution for 5 hours to remove sodium bicarbonate solution, and then washed with hot distilled water and ethanol several times to remove concentrated HCl. Put it in an oven at 70°C for 12 hours to remove the moisture. The scanning electron microscope image of the material after drying is shown in image 3 shown. The adsorption capacity of materials to various oils such as Figure 4 shown. The adsorbed material was extruded and placed in absolute ethanol to remove the adsorbed oil. Repeat the test more than 20 times, the adsorption capacity of carbon tetrachloride is as follows: Figure 5 shown.

Embodiment 2

[0037] Example 2: Accurately weigh 5.0 g of hydroxyl-terminated polydimethylsiloxane, 1.0 g of dibutyltin dilaurate, 6.0 g of carbon tetrachloride, and 6.0 g of tetrahydrofuran after stirring evenly. Drop by drop into 60mL of saturated sodium carbonate solution with a syringe. The stirring speed is 200r / min, and the stirring temperature is 70°C. After stirring for 3 hours, the material was taken out, soaked in concentrated HCl solution for 6 hours to remove sodium bicarbonate solution, and then washed with hot distilled water and ethanol several times to remove concentrated HCl. Put it in an oven at 80°C for 12 hours to remove the moisture therein. The adsorption capacity of materials to various oils such as Figure 6 shown. The adsorbed material was extruded and placed in absolute ethanol to remove the adsorbed oil. Repeat the test more than 20 times, the adsorption capacity of carbon tetrachloride is as follows: Figure 7 shown.

Embodiment 3

[0038] Example 3: Accurately weigh 5.0 g of PDMS dimethylsiloxane, 2.0 g of tetraethyl silicate, 10.0 g of carbon trichloride, and 10.0 g of cyclohexane and stir evenly. Drop by drop into 100mL of ammonium bicarbonate with a syringe. The stirring speed is 100r / min, and the stirring temperature is 90°C. After stirring for 3 hours, the material was taken out, soaked in concentrated HCl solution for 8 hours to remove sodium bicarbonate solution, and then washed with hot distilled water and ethanol several times to remove concentrated HCl. Put it in an oven at 80°C for 12 hours to remove the moisture therein. The adsorption capacity of materials to various oils such as Figure 8 shown. The adsorbed material was extruded and placed in absolute ethanol to remove the adsorbed oil. Repeat the test more than 20 times, the adsorption capacity of carbon tetrachloride is as follows: Figure 9 shown.

[0039] It can be seen from the examples and drawings that the porous oil-absorbing...

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Abstract

The invention relates to a preparation method of a polydimethylsiloxane porous adsorption material. The method comprises the steps that organo-siloxane is used as a preformed polymer, and a curing agent, a thinning agent, a pore-forming agent and a foaming agent are added; the porous adsorption material is prepared from, by weight, 10-20% of the siloxane preformed polymer, 1-5% of the curing agent, 10-30% of the thinning agent, 10-30% of the pore-forming agent and 30-50% of the foaming agent, uniform stirring is performed, the mixture is dropped into a foaming solution drop by drop, and the porous adsorption material is obtained through specific treatment. The obtained porous material can adsorb various oils and organic solvents such as petroleum ether, carbon tetrachloride, tetrahydrofuran, trichloromethane, normal octane, cyclohexane, normal octane, kerosene and ethyl acetate. The experimental method is novel, simple and easy to implement and low in cost, the material can be recycled, the material is environmentally friendly, and therefore the porous material has the excellent application prospect.

Description

technical field [0001] The invention relates to a preparation method of a porous adsorption material, in particular to a preparation method of a polydimethylsiloxane porous material, and belongs to the technical field of polymer materials. Background technique [0002] With the rapid development of global industry, petrochemical products gradually occupy an important position in people's production and life, providing people with great convenience. However, it is undeniable that some negative impacts have also been produced in the petrochemical production process, such as the pollution of organic solvents, the leakage of offshore oil, and the discharge of waste liquids. According to United Nations statistics, in the past 10 years, there have been about 232 oil spill accidents worldwide. In 2010, the oil spill in the Gulf of Mexico attracted worldwide attention. In recent years, China has also been in a period of high incidence of accidents. The frequent occurrence of mari...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/26B01J20/28095B01J2220/4812
Inventor 汪济奎郭家宏张赛彭星裘洲通马祥艳应杰徐婷汪宇明郭卫红
Owner EAST CHINA UNIV OF SCI & TECH
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