Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing mesoporous silica molecular sieve fiber

A mesoporous silica and molecular sieve technology, applied in chemical instruments and methods, molecular sieves and alkali exchange compounds, inorganic chemistry, etc., can solve the problems of difficult control of the diameter and length of silica molecular sieve fibers, harsh reaction conditions, etc. The effect of easy operation, high specific surface area and simple process requirements

Inactive Publication Date: 2009-03-18
SHANGHAI INST OF TECH
View PDF1 Cites 83 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, the reaction conditions for forming silica molecular sieve fibers in the prior art are relatively harsh, and the diameter and length of silica molecular sieve fibers are also difficult to control

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing mesoporous silica molecular sieve fiber
  • Method for preparing mesoporous silica molecular sieve fiber
  • Method for preparing mesoporous silica molecular sieve fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 0.3 g of Pluronic P123 (EO 20 PO 70 EO 20 ) and 2.5 grams of KCl and 0.6 grams of absolute ethanol were dissolved in 35 grams of 2mol.L -1 In the hydrochloric acid aqueous solution, after the surfactant, ethanol and sodium chloride are completely dissolved, further add 2.08 grams of tetraethyl orthosilicate TEOS into the mixed solution, and the solution is stirred at 40°C for 15 minutes and then stands still. Glue chemical process and cooperative self-assembly process to form mesoporous silica molecular sieve fibers. After the material was hydrothermally treated at 100°C for 24 hours, it was cooled to room temperature, filtered, dried in air, and finally fired at 550°C for 6 hours to remove the surfactant. figure 1 It is the scanning electron microscope figure of the sample of embodiment 1, and the sample observed by SEM is a mesoporous silica molecular sieve fiber, and the diameter of the fiber is 200nm, and the length is 150um; the XRD test shows that the sample ha...

Embodiment 2

[0022] 0.3 g of Pluronic F127 (EO 106 PO 70 EO 106 ) and 2.5 grams of KCl and 1.6 grams of absolute ethanol were dissolved in 35 grams of 2mol l.L -1In the hydrochloric acid aqueous solution, after the surfactant, ethanol and potassium chloride are completely dissolved, further add 2.08 grams of tetraethyl orthosilicate TEOS into the mixed solution, and the solution is stirred at 60°C for 20 minutes and then stands still. Glue chemical process and cooperative self-assembly process to form mesoporous silica molecular sieve fibers. After the material was hydrothermally treated at 100°C for 24 hours, it was cooled to room temperature, filtered, dried in air, and finally subjected to high-temperature calcination at 550°C for 4 hours to remove the surfactant. The sample observed by SEM is a mesoporous silica molecular sieve fiber with a diameter of 100nm and a length of 300um; figure 2 The X-ray diffraction spectrum of the sample obtained in Example 2, XRD test shows that the ...

Embodiment 3

[0024] 0.3 g of F108 (EO 132 PO 60 EO 132 ) and 3.2 grams of KCl and 0.8 grams of absolute ethanol were dissolved in 40 grams of 2mol l.L -1 In the hydrochloric acid aqueous solution, after the surfactant, ethanol and sodium sulfate are completely dissolved, further add 2.5 grams of tetraethyl orthosilicate TEOS into the mixed solution, and the solution is stirred at 40°C for 15 minutes, then stands still, and passes through sol, gel Chemical process along with cooperative self-assembly process to form mesoporous silica molecular sieve fibers. After the material was hydrothermally treated at 120°C for 36 hours, it was cooled to room temperature, filtered, dried in air, and finally subjected to high-temperature calcination at 550°C for 6 hours to remove the surfactant. The sample observed by SEM is a mesoporous silica molecular sieve fiber with a diameter of 250nm and a length of 3000um; XRD test shows that the sample has a two-dimensional hexagonal mesoporous structure. Th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Specific surface areaaaaaaaaaaa
Pore volumeaaaaaaaaaa
Login to View More

Abstract

The present invention discloses a method for preparing a wide aperture mesoporous silica molecular sieve fiber. An industrialized nonionics or cationic surfactant is adopted as a template. An organic or inorganic silicon source is adopted as a precursor. In the state where various auxiliary reagents, such as inorganic salt, alcohol and the like, are added, the fiber is synthesized through the cooperative assembly between a surface active agent and inorganic species and a hydrothermal treatment process. The mesoporous silica molecular sieve fiber is between 3 and 20 nm in aperture, between 0.3 and 2.5 cm^3 / g in pore volume, and between 600 and 1200 cm^2 / g in specific area. The material is easy to obtain, the technical requirements are comparatively simple, and the operation is feasible. The method has a very wide application range in terms of the preparation of composite fortifying fiber and semiconductor porous nanometer tube and nanometer wire in the fields of nanometer microelectrode and aviation material.

Description

Technical field [0001] The present invention relates to an inorganic nanopore material, and more specifically to a method using a polymer block copolymer nonionic surfactant or a cationic surfactant as a template agent in an acidic medium through inorganic salts and organic alcohols. A method of synthesizing large pore size mesoporous silica molecular sieve fibers under hydrothermal conditions. Background technique [0002] Since the US Mobil Company synthesized the mesoporous molecular sieve M41S with high specific surface area, large pore volume and pore diameter in 1992, people have conducted extensive research on its applications in catalysis, adsorption, separation and nanodevices. Crystalline silica and fibrous silica mesoporous molecular sieves with special shapes such as spheres, flakes, and regular appearances have attracted special attention. Studies have shown that fibrous silica mesoporous molecular sieves have very important applications in microlaser devices, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D01F9/08C01B39/00
Inventor 沈绍典恽越靓毛东森卢冠忠
Owner SHANGHAI INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com