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Method for preparing chrysotile nano fiber

A technology of fiber serpentine and nanofibers, which is applied in the field of preparation of fiber serpentine nanofibers, can solve the problem that the fiber serpentine fibers cannot be peeled off the nanofibers, etc., and achieves the effects of good crystallinity, labor saving and high purity.

Inactive Publication Date: 2006-10-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods only disperse the large fiber bundles in asbestos into small fiber bundles, and cannot peel off the chrysotile fibers one by one until forming single nanofibers

Method used

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  • Method for preparing chrysotile nano fiber
  • Method for preparing chrysotile nano fiber
  • Method for preparing chrysotile nano fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0021] After purifying grade 6 chrysotile from a certain asbestos mine, take 10 g and add it into an aqueous solution with a volume of 1 L and a concentration of sodium diisooctyl sulfosuccinate of 2 g / L, and soak for 2 hours (note: diisooctyl sulfosuccinate The critical micelle concentration of sodium bicarbonate is about 1.08g / L; its saturated adsorption capacity on the surface of chrysotile is about 180mg / g). Then use a high-speed emulsifying disperser to stir and disperse the above mixed solution for 60 minutes at a speed of 6000 rpm. After the dispersion is completed, a yellow-white homogeneous asbestos colloidal solution will be obtained. The solution is centrifuged at 4000 rpm for 1 min to remove a small amount of fine impurities contained therein. The color of the asbestos colloidal solution after centrifugation is whiter and brighter, and it is filtered by suction, and washed repeatedly with distilled water for 6 to 8 times to remove the sodium diisooctyl sulfosuccina...

Embodiment 2

[0023] After purifying the asbestos tailings of an asbestos mine, take 10 g and add it to an aqueous solution with a volume of 1 L and a concentration of sodium dodecylbenzenesulfonate of 1.6 g / L, soak for 2 hours (note: dodecylbenzenesulfonic acid The critical micelle concentration of sodium is about 557mg / L; its saturated adsorption capacity on the surface of chrysotile is about 141mg / g). Then use a high-speed emulsifying disperser to stir and disperse the above mixed solution for 60 minutes at a speed of 6000 rpm. After the dispersion is completed, an off-white homogeneous asbestos colloidal solution will be obtained. The solution is centrifuged at 4000 rpm for 1 min to remove a small amount of fine impurities contained therein. The color of the asbestos colloidal solution after centrifugation is whiter and brighter. It is suction filtered and washed repeatedly with distilled water for 6 to 8 times to remove the sodium dodecylbenzenesulfonate remaining in the solution or ph...

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Abstract

The invention is a method for preparing a chrysotile nanofiber, comprising the steps of: using chrysotile commercial asbestos or asbestos gangue as raw materials, and purifying the raw material with water washing purification; mixing the purified raw material with anion surface active agent and water and soaking; dispersing; centrifugating and obtaining a white chrysotile nanofiber product by liquid-solid separation. And it can implement large-scale production and has a diameter generally 30-60 nm long, a length greater than 10 um, high purity, good crystallization degree, and relatively uniform appearance distribution.

Description

[technical field] [0001] The invention relates to a method for preparing chrysotile nanofibers, which belongs to the field of preparation and application of inorganic non-metallic materials, mineral materials and ultrafine materials. [Background technique] [0002] Since the Japanese scientist Iijima discovered carbon nanotubes in 1991, many types of one-dimensional nanofibers (including nanowires, nanotubes, nanorods, etc.) have been prepared successively. Because of their special structure, morphology characteristics, and potential wide application prospects in many fields, one-dimensional nanomaterials have attracted more and more attention, and related preparation, performance, and application research are in the ascendant. Due to the shortcomings of artificially synthesized one-dimensional nanomaterials such as high cost and complicated process, the preparation of nanofibers from cheap natural minerals and biological materials has gradually attracted people's attention....

Claims

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Application Information

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IPC IPC(8): C03B37/00
Inventor 冯其明刘琨杨艳霞张国范欧乐明卢毅屏
Owner CENT SOUTH UNIV
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