Preparation method of hydrophobic silica fiber film and use of the hydrophobic silica fiber film in removal of organic pollutants

A technology of organic pollutants and silicon dioxide, applied in the direction of silicon dioxide, silicon oxide, silicon compounds, etc., can solve the problem of chemical inertness of silicon dioxide fiber membrane, and achieve the effect of mild conditions and enhanced ability

Inactive Publication Date: 2012-10-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention is to solve the problem of chemical inertness of existing silica fiber membranes, and provides a kind of preparation method of functionalized hydrophobic silica nanofiber membranes

Method used

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  • Preparation method of hydrophobic silica fiber film and use of the hydrophobic silica fiber film in removal of organic pollutants
  • Preparation method of hydrophobic silica fiber film and use of the hydrophobic silica fiber film in removal of organic pollutants
  • Preparation method of hydrophobic silica fiber film and use of the hydrophobic silica fiber film in removal of organic pollutants

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Experimental program
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specific Embodiment approach 1

[0015]Specific embodiment one: the preparation method of hydrophobic silicon dioxide nanofiber film is carried out as follows: 1. take the silane of band functional group and solvent, wherein the silane of band hydrophobic functional group: the volume ratio of solvent is 1: 10 to 1800, mix the silane with hydrophobic functional groups and the solvent to form a silane solution; 2. Immerse the silica nanofiber membrane in the silane solution prepared in step 1, react for 1 to 30 hours, and take it out to obtain a hydrophobic Silica nanofiber membrane.

[0016] The hydrophobic silica nanofiber membrane prepared in this embodiment also has a large number of nanopores between the fibers, and there are a large number of in-situ hydrophobic functional groups on the surface of the hydrophobic silica nanofiber membrane. Completed at the same time as the preparation, these hydrophobic functional groups are combined with the matrix by chemical bonds. The binding force is strong, such as ...

specific Embodiment approach 2

[0017] Specific embodiment two: The difference between this embodiment and specific embodiment one is that the silane with functional groups described in step one is bromopropyl trichlorosilane, dodecyl trichlorosilane, methyl trichlorosilane, Octadecyltrichlorosilane, Monomethyltrichlorosilane, Vinyltrichlorosilane, Monophenyltrichlorosilane, Phenyltrichlorosilane, Chloropropyltrichlorosilane, Dimethyldichlorosilane, Methyl Phenyldichlorosilane, diphenyldichlorosilane, monomethyldichlorosilane, methylvinyldichlorosilane, monomethyldichlorohydrosilane, chloropropylmethyldichlorosilane, tert-butyldiphenyl Chlorosilane, tert-butyldimethylsilyl chloride, chloromethylsilane, chlorotrimethylsilane, bromotrimethylsilane, bromotrimethylsilane, iodotrimethylsilane, γ-aminopropyl Trimethoxysilane, γ-aminopropyltriethoxysilane, bis[3-(triethoxysilylpropyl)]amine, N-β-aminoethyl-γ-aminopropylmethyldimethoxy Silane, aminoethylaminoisobutylmethyldimethoxysilane, N-β-aminoethylγ-aminopropy...

specific Embodiment approach 3

[0019] Specific embodiment three: The difference between this embodiment and specific embodiment one or two is that the silane with functional groups described in step one can also be perfluorooctylethyltrimethoxysilane, trifluoropropyltrimethoxy Vinylsilane, Vinyltrimethoxysilane, Vinyltris(β-methoxyethoxy)silane, Vinylmethyldimethoxysilane, Vinylmethyldiethoxysilane, Vinyltriethoxysilane γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropylmethyldimethoxysilane, γ-methacryloxypropyltriethoxy Silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane, γ-glycidyl etheroxypropyl Trimethoxysilane, γ-glycidyloxypropylmethyldimethoxysilane, γ-glycidyloxypropylmethyldiethoxysilane, γ-glycidyloxypropylmethyl triethyl Oxysilane, γ-Chloropropyltrimethoxysilane, γ-Chloropropyltriethoxysilane, γ-Chloropropylmethyldimethoxysilane, γ-Chloropropylmethyldiethoxysilane , Methyltrimethoxysilane, Methyltriethoxysilane, Methyltriacetoxysilane, Methy...

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Abstract

The invention discloses a preparation method of a hydrophobic silica fiber film and a use of the hydrophobic silica fiber film in removal of organic pollutants. The preparation method solves the problem that the existing silica fiber film adsorbs hydrophobic organic pollutants in water difficultly. The preparation method comprises the following steps of preparing silanes with hydrophobic groups and one or more solvents into a silane solution, and immersing a silica nanofiber film in the silane solution for modification so that a hydrophobic group-modified silica nanofiber film is obtained. The hydrophobic groups on surfaces of the silica nanofibers can bind with matrix silica by chemical bonds and thus the hydrophobic silica fiber film has strong adhesion, can be separated and recovered, can be prepared under mild conditions, and can be used as an adsorbent for adsorbing hydrophobic organic pollutants in a water source.

Description

technical field [0001] The invention relates to a preparation method of a hydrophobic silica nanofiber membrane and its application in removing persistent organic pollutants in water. Background technique [0002] Persistent organic pollutants (POPs) are a group of organic compounds that are toxic, persistent, easy to accumulate in organisms, and undergo long-distance migration and deposition, causing serious damage to the environment and human body. Some experiments and survey results show that POPs can cause serious harm to human endocrine function, immune function, reproductive function, nervous system, etc., and also have teratogenic, mutagenic and carcinogenic effects. In May 2001, 127 countries and regions in the world signed an international agreement to prohibit and restrict the use of 12 POPs in Stockholm, Sweden. These 12 substances include: Aldrin, chlordane, DDT, dieldrin, endrin, heptachlor, mirex, toxaphene and other 8 insecticides, as well as polychlorinated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12B82Y40/00B82Y30/00C02F1/28B01J20/10
Inventor 戴志飞李守柱岳秀丽景元淼
Owner HARBIN INST OF TECH
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