A kind of preparation method of straight channel magnetic material

A magnetic material and straight channel technology, applied in the direction of inorganic material magnetism, silicon dioxide, silicon oxide, etc., can solve the problems of cumbersome self-assembly process, limited material load capacity, sample variability and rupture, etc., to achieve easy acquisition, movement Small resistance, the effect of reducing the penetration resistance

Inactive Publication Date: 2017-02-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the methods for preparing straight-channel magnetic materials mainly include template method or self-assembly method, but for the template method, the template needs to be removed at the end, which is easy to introduce impurities; the self-assembly method is cumbersome, not conducive to industrial production, and the prepared material is relatively thin Or thin film materials, such materials have limited load capacity; samples are subject to variability and rupture; mass production is difficult

Method used

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  • A kind of preparation method of straight channel magnetic material
  • A kind of preparation method of straight channel magnetic material
  • A kind of preparation method of straight channel magnetic material

Examples

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Embodiment 1

[0033] Measure 6ml of 5wt% PVA solution, add 3g of SDS to obtain a PVA solution containing 0.5g / ml SDS, mix with 6ml of 40wt% silica sol, place on a magnetic stirrer, and stir at room temperature to make the silica sol evenly dispersed in the solution. The resulting dispersion was placed in a beaker and slowly immersed in liquid nitrogen to freeze the dispersion into a solid state. Put the frozen sample into a vacuum freeze dryer whose temperature has reached -60°C, turn on the vacuum mode, and operate the vacuum freeze dryer for 48 hours in the vacuum freeze mode, and take out the sample. Put the sample in a crucible and put it into a resistance furnace for calcination, heat up to 800°C at 5°C / min, stop heating after holding for 1 hour, let it cool naturally in the furnace to room temperature, and obtain a straight-channel silica block. Immerse the silica block in 0.5 M FeCl 3 In the aqueous solution, and draw a vacuum, hold the pressure for 30 minutes, take out the sample, ...

Embodiment 2

[0040] Measure 6ml of 5wt% PVA solution, add 3g of SDS to obtain a PVA solution containing 0.5g / ml SDS, mix with 6ml of 40wt% silica sol, place on a magnetic stirrer, and stir at room temperature to make the silica sol evenly dispersed in the solution. The resulting dispersion was placed in a beaker and slowly immersed in liquid nitrogen to freeze the dispersion into a solid state. Put the frozen sample into a vacuum freeze dryer whose temperature has reached -60°C, turn on the vacuum mode, and operate the vacuum freeze dryer for 48 hours in the vacuum freeze mode, and take out the sample. The sample was placed in a crucible and calcined in a resistance furnace, and the temperature was raised to 900°C at a rate of 5°C / min. After holding for 1 hour, the heating was stopped, and it was naturally cooled to room temperature in the furnace to obtain a silica block with straight channels. Immerse the silica block in 0.5 M FeCl 3 In the aqueous solution, and draw a vacuum, hold the ...

Embodiment 3

[0042]Measure 6ml of 2.5wt% PVA solution, add 3g of SDS to obtain a PVA solution containing 0.5g / ml SDS, mix it with 6ml of 40wt% silica sol, place it on a magnetic stirrer, and stir at room temperature to disperse the silica sol evenly in the solution . The resulting dispersion was placed in a beaker and slowly immersed in liquid nitrogen to freeze the dispersion into a solid state. Put the frozen sample into a vacuum freeze dryer whose temperature has reached -60°C, turn on the vacuum mode, and operate the vacuum freeze dryer for 48 hours in the vacuum freeze mode, and take out the sample. The sample was placed in a crucible and calcined in a resistance furnace, and the temperature was raised to 900°C at a rate of 5°C / min. After holding for 1 hour, the heating was stopped, and it was naturally cooled to room temperature in the furnace to obtain a silica block with straight channels. Immerse the silica block in 0.5 M FeCl 3 In the aqueous solution, and draw a vacuum, hold t...

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Abstract

The present invention discloses a preparation method of a straight hole channel magnetic material. The method comprises: first, freezing and drying silica sol directionally, and then, obtaining a straight hole channel silica bulk material after high temperature calcination; next, dipping the silica bulk in FeCl3, and taking out the substance for drying; and finally, reducing the dipped and dried silica bulk by using NaBH4 or H2, so as to obtain the straight hole channel magnetic bulk material. The method is simple and easy to implement. A finished product prepared by the method has a controllable structure and good stability and can be mass-produced. Compared with a conventional porous material, the magnetic material prepared by the method has an excellent straight hole channel structure, facilitating the material transmission in the hole channel, namely; and a hole structure has small motion resistance, so permeation resistance is reduced, and efficiency is increased.

Description

technical field [0001] The invention relates to a preparation method of a straight channel magnetic composite material. Background technique [0002] In recent years, porous magnetic materials have received a lot of attention due to their unique structures, functions and wide range of applications. Therefore, it is urgent to design and manufacture porous magnetic materials. Since the pore structure of porous materials is closely related to the material properties, the control of the pore structure is very important. For example, a magnetic silica material with a mesoporous structure has been widely used in targeted drug delivery and multiphase separation. A novel hierarchical porous magnetic composite consisting of macropores, mesopores, and small pores templated by polystyrene particles and a three-phase copolymer has been used to immobilize lipase to catalyze ester hydrolysis. [0003] As a unique porous material, materials with straight pore structures have potential a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/01C01B33/14
Inventor 钱磊陆璐魏玉磊林杰孙凯
Owner SHANDONG UNIV
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