Oleophobic modification method of polybutadiene membrane

A polybutadiene modification technology, which is applied in the field of organic membrane modification and preparation, can solve the problems of difficult amplification and complicated process, and achieve the effects of stable air flow, short preparation time and good filtration performance

Inactive Publication Date: 2019-01-25
NANJING POLYTECHNIC INSITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these processes are not easy to scale up, and the process is more complicated

Method used

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  • Oleophobic modification method of polybutadiene membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, 0.5 g of silicon dioxide powder and 50 ml of cyclohexane were sonicated to obtain a homogeneous solution. Secondly, 0.5ml of perfluorooctyltrimethoxysilane (PFTMS) was added during the stirring process, and the stirring continued for 10 hours (600 rpm). After the stirring was completed, it was centrifuged at 10000 rpm for 10 minutes. The silicon dioxide particles were dried at 60° C. for 5 hours to obtain hydrophobic and oil-repellent nano silicon dioxide particles.

[0023] Add 2 g of the obtained fluorinated silica nanoparticles to 100 mL of ethanol and stir to obtain a suspension, and filter the suspension of fluorinated silica nanoparticles under a pressure of 0.1 Mpa to adsorb the nanoparticles on the polybutadiene fiber on the surface. Then, the modified film was rinsed repeatedly with ethanol, and finally the polybutadiene film was dried in an oven at 80° C. for 5 hours.

[0024] like figure 1 As shown, the water and cetane oil contact angles of the mod...

Embodiment 2

[0027] First, 1 g of silicon dioxide powder and 50 ml of cyclohexane were sonicated to obtain a homogeneous solution. Secondly, 1ml of perfluorooctyltrichlorosilane was added during the stirring process, and the stirring continued for 12 hours (400 rpm). After the stirring was completed, centrifugation was carried out at 10,000 rpm for 20 minutes. drying at 80°C for 5 hours to obtain hydrophobic and oleophobic nano silicon dioxide particles.

[0028] Add 4 g of the obtained fluorinated silica nanoparticles to 100 mL of ethanol and stir to obtain a suspension, and filter the suspension of fluorinated silica nanoparticles under a pressure of 0.2 Mpa to adsorb the nanoparticles on the polybutadiene fibers on the surface. Then, the modified film was rinsed repeatedly with ethanol, and finally the polybutadiene film was dried in an oven at 100° C. for 5 hours.

[0029] The water contact angle of the modified PTFE membrane is 142°, and the contact angle of cetane oil is 121°.

Embodiment 3

[0031] First, 0.5 g of silicon dioxide powder and 40 ml of cyclohexane were sonicated to obtain a homogeneous solution. Secondly, 0.5ml of perfluorodecyl acrylate was added during the stirring process, and the stirring continued for 16h (600 rpm). drying at 60°C for 10 hours to obtain hydrophobic and oleophobic nano silicon dioxide particles.

[0032] Add 3 g of the obtained fluorinated silica nanoparticles to 100 mL of ethanol and stir to obtain a suspension, and filter the suspension of fluorinated silica nanoparticles under a pressure of 0.1 Mpa to adsorb the nanoparticles on the polybutadiene fibers on the surface. Then the modified film was washed repeatedly with ethanol, and finally the polybutadiene film was dried in an oven at 80°C for 10 hours.

[0033] The water contact angle of the modified PTFE membrane is 140°, and the contact angle of cetane oil is 123°.

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Abstract

The invention relates to an oleophobic modification method of polybutadiene membrane. A fluorinating agent is adopted to conduct immersion treatment on silicon dioxide nano-particles, then the fluorinated silicon dioxide nano-particles are supported on polybutadiene fiber through a suction filtration method to obtain a porous polybutadiene membrane material having hydrophobic and oleophobic properties. The oleophobic property of the polybutadiene membrane is improved, and water and oil contact angles of the modified polybutadiene membrane are respectively 143 degrees and 120 degrees. The modified polybutadiene membrane shows stable air flow and also shows good suction filtration property in an oil-containing system, and the retention rate of oily smoke reaches 99.5% or above.

Description

technical field [0001] The invention relates to a modification preparation method of an organic membrane, in particular to an oleophobic modification preparation method of a polybutadiene membrane. Background technique [0002] In the production process of chemical, petroleum, steel, food and other industries, some organic substances are often emitted to form oily aerosols, mainly compounds such as aldehydes, ketones, hydrocarbons, aromatic compounds and esters. Long-term inhalation of these oily aerosol air may cause some diseases, such as lung damage, decreased human immunity, potential carcinogenicity, etc. Therefore, it is very necessary for us to remove oily aerosols from the air. However, oils have high viscosity and low surface energy, so that they can easily penetrate the surface of filter materials and block the pores of most filter materials. [0003] Polybutadiene (polybutadiene) is known for its excellent high temperature resistance, chemical stability, hydroph...

Claims

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Application Information

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IPC IPC(8): D06M11/79D06M101/20
CPCD06M11/79D06M2101/20D06M2200/11
Inventor 李冬燕朱敏陈学梅王晓梅任春梅刘健
Owner NANJING POLYTECHNIC INSITUTE
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