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Super-hydrophobic and magnetic PS/SiO2 oil-water separation material and preparation method thereof

An oil-water separation, super-hydrophobic technology, applied in separation methods, adsorbed water/sewage treatment, liquid separation, etc., can solve the problems of low hydrophobicity adsorption, poor hydrophobicity and lipophilicity, and poor oil retention, and achieve excellent hydrophobicity. The effect of lipophilicity, high recycling rate and simple preparation process

Active Publication Date: 2017-01-04
NANJING UNIV OF SCI & TECH
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Problems solved by technology

Jianyu Mao et al. (Jianyu Mao, Wei Jiang, Junjun Gu, Shuai Zhou, Yue Lu, TanXie, Synthesis of P(St-DVB) / Fe 3 o 4 microspheres and application for oil removalin aqueous environment, Applied Surface Science, 2014, 317:787-793) by using magnetic Fe 3 o 4 The microsphere is the core, PS is the shell, and the core-shell structure of Fe 3 o 4 / PS nanocomposite material is used for oil adsorption, and the adsorption capacity can reach 8.42 times of its own, but the material has poor hydrophobic and lipophilic ability, poor thermal stability, and after repeated use, the magnetic strength drops significantly
Liuhua Yu et al. (Liuhua Yu, Gazi Hao, Qianqian Liang, Shuai Zhou, Ning Zhang, Wei Jiang, Facile preparation and characterization of modifiedmagnetic siliconanocomposite particles for oil absorption, Applied SurfaceScience 357 (2015) 2297-2305) through hollow magnetic Fe 3 o 4 Nano-microspheres are used as the magnetic carrier, and silica with a large specific surface area and rough surface is used as the adsorption layer, and a high-Fe core-shell structure is prepared. 3 o 4 / SiO 2 Nanocomposite materials can be recycled under the action of an external magnetic field after adsorption, but the industrial production of materials is limited due to their low hydrophobicity and adsorption
Junjun Gu et al. (Junjun Gu, Wei Jiang, Fenghe Wang, Mudan Chen, JianyuMao, Tan Xie Facile removal of oils from water surfaces through highlyhydrophobic and magnetic polymer nanocomposites, Applied Surface Science,2014, 301(19):492-499) The terpolymer Fe was prepared by two emulsion methods 3 o 4 / PS / PMMA, this composite material has excellent selective adsorption capacity, the material can be recycled by applying an external magnetic field after adsorption, and can maintain a high water contact angle in strong acid, strong alkali and salt solution, but the preparation of this nano The process repeatability of composite materials is poor, the oil retention after oil absorption is poor, the adsorption rate of oil pollution is slow, and the maximum adsorption capacity can only reach 9.41 times of its own, so it cannot be widely used to deal with industrial oil spills

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  • Super-hydrophobic and magnetic PS/SiO2 oil-water separation material and preparation method thereof

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preparation example Construction

[0031] A kind of superhydrophobic magnetic PS / SiO of the present invention 2 The preparation method of oil-water separation material, concrete preparation process such as figure 1 , including the following steps:

[0032] The first step: 80~100 mL of Fe with a mass concentration of 3~4 mg / mL 3 o 4 Deionized aqueous solution, sonicated at 25~35°C for 15 min to form Fe 3 o 4 uniform dispersion;

[0033] The second step, to the Fe obtained in the first step 3 o 4 Add 800~1000 mg of SDBS to the uniform dispersion, ultrasonically stir for 15 minutes, and then transfer it into a three-necked flask;

[0034] In the third step, raise the heating temperature of the water bath in the second step to 70-80°C, add St, DVB and AIBN in portions, and keep stirring for 4.5-5.5 h to make DVB and Fe 3 o 4 The mass ratio of St and AIBN is 1: 1.23:20.2: (0.16~0.18).

[0035] The fourth step is to wash the mixed emulsion obtained in the third step, and redisperse the crude product into th...

Embodiment 1

[0037] The first step: 80 mL of Fe with a mass concentration of 3 mg / mL 3 o 4 Deionized aqueous solution, sonicated at 25 °C for 15 min to form Fe 3 o 4 uniform dispersion;

[0038] The second step, to the Fe obtained in the first step 3 o 4 Add 800 mg of SDBS to the uniform dispersion, ultrasonically stir for 15 min, and then transfer it into a three-necked flask;

[0039] In the third step, increase the heating temperature of the water bath in the second step to 70°C, add 4 mL St, 0.2 mL DVB, and 30 mg AIBN in portions, and continue stirring for 5.5 h;

[0040] In the fourth step, the mixed emulsion obtained in the third step is washed, and the crude product is redispersed into a mixed solution of ethanol and isopropanol, wherein the mixed solution of ethanol and isopropanol is prepared by mixing 20 mL deionized water and 20 mL Isopropanol with 60 mL of ethanol, followed by 1 mL of surfactant Tween 20 and acid-base regulator NH 3 ·H 2 O adjust the pH value to 8, incr...

Embodiment 2

[0042] The first step: 90 mL of Fe with a mass concentration of 3.5 mg / mL 3 o 4 Deionized aqueous solution, sonicated at 30 °C for 15 min to form Fe 3 o 4 uniform dispersion;

[0043] The second step, to the Fe obtained in the first step 3 o 4 Add 900 mg of SDBS to the uniform dispersion, ultrasonically stir for 15 min, and then transfer it into a three-necked flask;

[0044] In the third step, increase the heating temperature of the water bath in the second step to 75°C, add 5 mL St, 0.25 mL DVB, and 40 mg AIBN in portions, and continue to stir for 5 h;

[0045] In the fourth step, the mixed emulsion obtained in the third step is washed, and the crude product is redispersed into a mixed solution of ethanol and isopropanol, wherein the mixed solution of ethanol and isopropanol is prepared by mixing 20 mL deionized water and 20 mL Isopropanol with 60 mL of ethanol, followed by 1.5 mL of surfactant Tween 20 and acid-base regulator NH 3 ·H 2 O to adjust the pH value to 8....

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Abstract

The invention discloses a super-hydrophobic and magnetic PS / SiO2 oil-water separation material and a preparation method thereof. The oil-water separation material is a super-hydrophobic material adopting a core-shell structure, Fe3O4 is taken as a magnetic core, a PS layer is taken as an inner shell and a super-hydrophobic SiO2 layer is taken as an outer shell. The preparation method comprises the following steps: Fe3O4 is taken as the magnetic core, sodium dodecylbenzenesulphonate is added to a homogeneous dispersion of Fe3O4 firstly, the mixture is heated and stirred in water bath in a nitrogen atmosphere for a period of time, then styrene and divinylbenzene are added, and an emulsion polymerization reaction is performed under the action of 2,2'-azobis(2-methylpropionitrile); a crude product obtained through washing is re-dispersed in an ethanol and isopropanol mixed solution, the pH value is regulated, and silicon tetraacetate and methyltriethoxysilane are added slowly dropwise, and finally, the PS / SiO2 oil-water separation material with a rough surface is obtained. The prepared oil-water separation material has excellent hydrophobicity, lipophilicity, thermal stability and oil-water selectivity, is resistant to high temperature, resistant to acid and alkali corrosion, high in adsorption rate and high in recycling rate and can be used for treating industrial oil pollution.

Description

technical field [0001] The invention relates to a superhydrophobic magnetic PS / SiO 2 An oil-water separation material and a preparation method thereof belong to the research field of environment-friendly oil-absorbing materials. Background technique [0002] With the development of industry and the improvement of people's living standards, the discharge of oily wastewater, waste gas and oil spills of various sizes have been increasing, which have posed a threat to the ocean and people's lives. In order to avoid the adverse impact of crude oil spill on the ecosystem and the long-term harm of oil pollution, it is necessary to take appropriate measures to solve the pollution problem. At present, there are many oil pollution treatment methods, which can be divided into three types according to their properties: chemical method, biological method and physical method. Adding oil-absorbing materials to the physical method to treat oil pollution has the characteristics of high eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/40B01J20/28B01J20/26B01J20/30
CPCB01J20/06B01J20/261B01J20/28009B01J20/28011B01J2220/46C02F1/28C02F1/40
Inventor 姜炜郁榴华王玉姣谢覃肖磊周帅鲁磊明殷求实李凤生
Owner NANJING UNIV OF SCI & TECH
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