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Silicon oxide/titanium oxide composite mesoporous flexible non-woven fiber membrane, and preparation method and application thereof

A composite mesoporous and non-woven fiber technology, applied in the direction of alkali metal oxides/hydroxides, chemical instruments and methods, silicon compounds, etc., can solve the problems of poor mechanical properties of fiber membranes, limited application fields, and fragility. Achieve the effects of easy bending, large specific surface area, and good adsorption performance

Active Publication Date: 2013-09-25
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inorganic porous material non-woven fiber membrane prepared by the prior art tends to shrink severely during the process of calcination to remove organic matter, becomes hard and brittle, and is easily broken, resulting in poor mechanical properties of the prepared fiber membrane, which is difficult to be used as The application of a complete membrane material has greatly restricted its application field. At present, there has been no report on the preparation of a strong and soft inorganic mesoporous non-woven fiber membrane.

Method used

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  • Silicon oxide/titanium oxide composite mesoporous flexible non-woven fiber membrane, and preparation method and application thereof
  • Silicon oxide/titanium oxide composite mesoporous flexible non-woven fiber membrane, and preparation method and application thereof
  • Silicon oxide/titanium oxide composite mesoporous flexible non-woven fiber membrane, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Dissolve 0.2g of polyoxyethylene (Mw=1,000,000) in a mixed solution of 0.5g of water and 3.65g of absolute ethanol, add 2g of 20wt% titanium trichloride aqueous solution (add 0.16g, mass fraction of 37% concentrated hydrochloric acid stabilized titanium Salt), then add 1.85g of cetyltrimethylammonium bromide, stir well to dissolve. Slowly add 4 g of ethyl orthosilicate, vigorously stir and hydrolyze for 1 hour, place in an electrospinning spinneret with an inner diameter of 0.8 mm, and use a syringe pump to control the flow rate of the spinning solution to 1 mL / h. A positive voltage of 12kV is applied to the spinneret, and a negative voltage of 12kV is applied to the aluminum foil as the receiving electrode.

[0031] After the electrospinning process, a layer of inorganic-organic composite fiber membrane can be obtained on the receiving electrode. Put this product together with the receiving plate in the muffle furnace, calcined to 500 ° C for 2 hours, and after cooling...

Embodiment 2

[0033] Dissolve 0.7g of polyvinyl alcohol (Mw=90,000) in a mixed solvent of 6g of water and 1g of ethanol in a water bath at 90°C. Add 1g of 10wt% titanium tetrachloride solution (stabilized with 10wt% hydrochloric acid aqueous solution), then add 1.5g of hexadecyltrimethylammonium chloride, fully stir to dissolve and mix. Slowly add 3 g of tetraethyl orthosilicate, stir vigorously and hydrolyze for 6 hours, place in an electrospinning spinneret, use aluminum foil as a receiving electrode, and ground it.

[0034] After the electrospinning process, a layer of inorganic-organic composite fiber membrane can be obtained on the receiving electrode. Put this product together with the receiving plate in the muffle furnace, calcined to 750 ° C for 4 hours, and after cooling to room temperature, the silicon oxide / titanium oxide composite mesoporous flexible non-woven fiber membrane can be removed from the receiving plate , the specific surface area of ​​the prepared silica / titanium ox...

Embodiment 3

[0036] Dissolve 0.4g of polyoxyethylene (Mw=300,000) in a mixed solution of 0.5g of water and 3.65% of absolute ethanol, add 2g of 40wt% titanium sulfate solution (stabilized with 20wt% sulfuric acid aqueous solution), and then add 2g of octadecyltrimethyl ammonium bromide, stirred thoroughly to dissolve after mixing. Slowly add 4g of methyl orthosilicate, vigorously stir and hydrolyze for 0.5 hours, then in the electrospinning spinneret, the inner diameter of the spinneret is 0.8mm, and the flow rate of the spinning solution is controlled by a syringe pump to 0.8mL / h. A positive voltage of 15kV is applied to the spinneret, and a negative voltage of 10kV is applied to the aluminum foil as the receiving electrode.

[0037] After the electrospinning process, a layer of inorganic-organic composite fiber membrane can be obtained on the receiving electrode. Put this product together with the receiving plate in the muffle furnace, calcined to 400 ° C for 2 hours, and after cooling ...

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Abstract

The invention relates to a silicon oxide / titanium oxide composite mesoporous flexible non-woven fiber membrane, and a preparation method and an application thereof. The invention belongs to the field of inorganic porous material preparation. According to the invention, a mixed solution of a polymer, water-soluble titanium salt, and a surfactant is prepared; an alcohol salt of silicon is added, and the mixture is strongly stirred and hydrolyzed, such that a spinning solution is prepared; and electrostatic spinning and calcining processes are carried out, such that the silicon oxide / titanium oxide composite mesoporous flexible non-woven fiber membrane is obtained. The silicon oxide / titanium oxide composite mesoporous flexible non-woven fiber membrane has ultra-large specific surface area, excellent chemical stability, excellent thermal stability, excellent mechanical stability, and excellent performance in organic sewage treatment. The method is simple and feasible, has low cost, and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic porous materials, and in particular relates to a silicon oxide / titanium oxide composite mesoporous flexible non-woven fiber membrane, a preparation method and an application thereof. Background technique [0002] Inorganic porous materials, such as mesoporous molecular sieves, have attracted widespread attention in the fields of adsorption and catalysis due to a series of advantages such as large specific surface area, uniform nano-scale pores, and excellent chemical and thermal stability. Mesoporous molecular sieves with special morphology, such as membranes, spheres, fibers and other inorganic porous materials, have broad application prospects in the fields of optoelectronic devices, membrane catalytic reactors, tissue engineering, and domestic and industrial sewage treatment. [0003] As early as 1745, Bose discovered that an electric field can drive liquid droplets to form aer...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01D71/02C02F1/28C02F1/44C02F101/30
Inventor 于吉红温强邸建城王洋
Owner JILIN UNIV
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