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Multifunctional polydimethylsiloxane foam composite material and preparation method thereof

A polydimethylsiloxane and dimethylsiloxane technology, which is applied in the field of functional polymer material preparation, can solve the problems of difficult adsorption and separation of crude oil with high viscosity, and achieve excellent photothermal performance and preparation technology. Simple, mild and controllable reaction conditions

Active Publication Date: 2020-09-11
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is still difficult to prepare a foam composite material that is superhydrophobic / superoleophilic, corrosion-resistant, recyclable, and capable of efficiently separating oil and water from emulsions; Adsorption separation

Method used

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  • Multifunctional polydimethylsiloxane foam composite material and preparation method thereof
  • Multifunctional polydimethylsiloxane foam composite material and preparation method thereof
  • Multifunctional polydimethylsiloxane foam composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Soak cube sugar (semi-cube shape made of fine-grain refined granulated sugar, purchased from supermarkets) in dimethylsiloxane and curing agent (SYLGARD184 DOW CORNING, commercially available) with a mass ratio of 10: 1 and placed in a vacuum environment, after soaking for 5 hours, solidify it at 80±10°C, wash the resulting product with distilled water to remove the sugar template part, obtain a polydimethylsiloxane foam and dry it at 80°C Dry it for 1h. The preparation process is as figure 1 As shown, the microscopic morphology of the prepared polydimethylsiloxane foam was observed with a scanning electron microscope as Figure 2a .

[0036] (2) Test: Contact angle test: Use OCA20 contact angle measuring instrument to test the contact angle of polydimethylsiloxane foam, drop 5 μL distilled water, 5 μL acid solution with pH=1, and 5 μL alkali solution with pH=14 respectively On the foam surface, in order to ensure the accuracy of the results, test 3 times, take t...

Embodiment 2

[0038] (1) Soak the sugar cube template in a mixture of dimethylsiloxane and curing agent (SYLGARD 184 DOW CORNING) with a mass ratio of 10:1 and place it in a vacuum environment. After soaking for 5 hours, place it at 80± After solidification at 10°C, the resulting product was washed with distilled water to remove the sugar template part to obtain a polydimethylsiloxane foam, which was then dried at 80°C for 1 hour. The obtained foam was soaked in a tetrahydrofuran dispersion of carbon nanofibers with a mass fraction of 0.1 wt.%, subjected to ultrasonic treatment for 30 min, and dried at 80 °C for 1 h after the treatment was completed. Soak the dried foam in a n-heptane solution with a mass fraction of 0.5 wt.% dimethylsiloxane, take it out after soaking for 5 minutes, and dry it at 80°C for 1 hour to obtain a multifunctional carbon nanofiber-modified polystyrene foam. Dimethicone foam composite. The preparation process is as figure 1 As shown, the micro-morphology of the p...

Embodiment 3

[0041] (1) Soak the sugar cube stencil in a mixture of dimethylsiloxane and curing agent (SYLGARD184 DOW CORNING) with a mass ratio of 10:1 and place it in a vacuum environment. After soaking for 5 hours, place it at 80±10 The resulting product was cured at ℃, and the sugar cube stencil part was washed away with distilled water to obtain a polydimethylsiloxane foam, which was dried at 80℃ for 1 hour. The obtained foam was soaked in a tetrahydrofuran dispersion of carbon nanofibers with a mass fraction of 0.1 wt.% and subjected to ultrasonic treatment for 30 min. After the treatment was completed, it was dried at 80 °C for 1 h. The ultrasonic-drying step was performed twice. Soak the dried foam in a n-heptane solution with a mass fraction of 0.5wt.% dimethylsiloxane, take it out after soaking for 5 minutes, and dry it to obtain a multifunctional carbon nanofiber modified polydimethylsiloxane Oxane foam composite. The preparation process is as figure 1 As shown, the microscopi...

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Abstract

The invention discloses a multifunctional polydimethylsiloxane foam composite material and a preparation method thereof. The method comprises the following steps: firstly, preparing polydimethylsiloxane foam by taking cube sugar as a template, then loading carbon nanofibers on the surface and inside the polydimethylsiloxane foam through ultrasonic driving, then coating a small amount of dimethylsiloxane on the surface of the polydimethylsiloxane foam through an impregnation method to fix the carbon nanofibers, and finally curing to obtain the multifunctional foam composite material. The polydimethylsiloxane foam composite material prepared by the preparation method disclosed by the invention has excellent super-hydrophobicity / super-lipophilicity, oil absorption selectivity and photo-thermal property, effective oil-water separation and emulsion separation in different environments can be realized, and meanwhile, the viscosity of crude oil can be reduced by the polydimethylsiloxane foamcomposite material prepared by the method through the photo-thermal effect, and rapid absorption can be realized, so that the polydimethylsiloxane foam composite material has great application potential in treatment of offshore crude oil leakage.

Description

technical field [0001] The invention relates to a multifunctional carbon nanofiber modified polydimethylsiloxane foam composite material and a preparation method thereof, belonging to the technical field of preparation of functional polymer materials. Background technique [0002] Oil spills have now become a serious environmental problem, threatening aquatic ecosystems and even human habitation. In particular, oil spills often form emulsions under the action of emulsifiers, which brings more difficulties to oil / water separation. In addition, the oil may be dispersed in the corrosive solution, posing new challenges for oil-water separation. [0003] As an important industrial raw material, the production and transportation of crude oil usually adopts the method of waterway transportation. However, with the development of the oil transportation industry, the number of offshore crude oil spills is also increasing. Toxic compounds such as benzene and toluene contained in petr...

Claims

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Application Information

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IPC IPC(8): C08J9/40C08J9/28B01J20/26B01J20/28B01J20/30B01D17/02C08L83/04
CPCC08J9/40C08J9/28B01J20/26B01J20/28045B01J20/28011B01D17/0202C08J2383/04C08J2201/0422
Inventor 高杰峰郭峥龙彪高世杰王栋
Owner YANGZHOU UNIV
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