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Preparation method of functional shell band-shaped silica nano fibrous membrane

A technology of nanofiber membrane and silica, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc.

Inactive Publication Date: 2010-08-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the problem that the existing silica fiber membrane preparation method requires high temperature calcination and post-modification, and provides a preparation method of functionalized shell band silica nanofibers

Method used

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  • Preparation method of functional shell band-shaped silica nano fibrous membrane
  • Preparation method of functional shell band-shaped silica nano fibrous membrane
  • Preparation method of functional shell band-shaped silica nano fibrous membrane

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0012] Specific implementation mode one ： The preparation method of the functionalized shell strip-shaped silica nanofiber membrane of the present embodiment is carried out according to the following steps: 1. Weigh the silane with functional groups, acid and solvent, wherein the silane with functional groups: the volume ratio of acid 1:0.1~1.2, the volume ratio of silane with functional groups:solvent is 1:30~180, mix the silane with functional groups, acid and solvent evenly, and then leave it for 1h~6h to get silane sol; 1. Immerse the polymer fiber membrane in the silane sol prepared in step 1, and take it out after immersion for 1 to 30 minutes; 3. Place the polymer fiber membrane treated in step 2 in an ammonia atmosphere for 6h to 20h to obtain the outer surface A fiber membrane coated with a layer of functionalized silica; 4. Immerse the fiber membrane coated with a layer of functionalized silica obtained in step 3 in the fiber solvent, keep it for 1h to 6h, take it ou...

specific Embodiment approach 2

[0014] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the silane with functional groups described in step 1 is γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, Bis[3-(triethoxysilylpropyl)]amine, N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane, aminoethylaminoisobutylmethyldimethoxysilane, N -β-aminoethyl-γ-aminopropyltrimethoxysilane, N-β-aminoethyl-γ-aminopropyltriethoxysilane, γ-aminopropylmethyldimethoxysilane, γ -aminopropylmethyldiethoxysilane, anilinomethyltrimethoxysilane, N,N-diethyl-γ-aminopropyltrimethoxysilane, ureapropyltrimethoxysilane, N-methyl -γ-aminopropyltrimethoxysilane, 3-(2-hydroxyethylaminoethyl)-aminopropylmethyldimethoxysilane, γ-mercaptopropyltriethoxysilane, γ-mercaptopropane Trimethoxysilane, γ-mercaptopropylmethyldimethoxysilane, γ-mercaptopropylmethyldiethoxysilane, isocyanatopropyltriethoxysilane. Others are the same as in the first embodiment.

[0015] The functionalized shell ban...

specific Embodiment approach 3

[0016] 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 functional shell band-shaped silica nano fibrous membrane, which relates to a preparation method of a silica fibrous membrane and solves the problems of high-temperature calcining and modification of a traditional preparation method of the silica fibrous membrane. The method comprises the steps of: preparing silane sol by using silane with a functional group, acid and a solvent; soaking a macromolecular fibrous membrane in the silane sol; taking out the mixture and then putting the mixture into an ammonia an ammonia atmosphere; soaking in a fibrous solvent for removing macromolecular fibers; washing and drying to obtain the functional shell band-shaped silica nano fibrous membrane. The functional group of the surfaces of the fibers is combined with a base body by using a chemical bond, therefore, the functional shell band-shaped silica nano fibrous membrane has strong binding force, high material thermal stability, separable and recyclable performance and mild condition of the preparation process, and can be used as an adsorbent in a water body for removing heavy metal ions or organic pollutants.

Description

technical field [0001] The invention relates to a method for preparing a silica fiber membrane. Background technique [0002] Due to the application of mercury, lead, cadmium, copper and their compounds in mining, smelting, electronics, electroplating, petroleum, fertilizer manufacturing and other industries, heavy metal ions in water bodies are polluted. If heavy metal ions in water bodies enter the ecosystem, it will be easy Absorbed by aquatic marine animals and enters the food chain, posing a threat to the health of plants, animals and humans. When using nanopowders to remove heavy metals in water, nanopowders are not easy to settle in aqueous solution, and it is difficult to separate and recover heavy metals after adsorption, which affects and limits its practical application. Fiber membrane materials with one-dimensional nanostructures have a large amount of Microporous, and become an ideal filter membrane material. When the fiber membrane material is used to remove ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/12
Inventor 戴志飞李守柱柏珊珊岳秀丽
Owner HARBIN INST OF TECH