Magnetic mesoporous composite material as well as preparation method and application thereof

A composite material and mesoporous technology, applied in the direction of microsphere preparation, chemical instruments and methods, microcapsule preparation, etc., can solve the problems of complex preparation process, small particle size, unsatisfactory adsorption and separation effect, etc.

Active Publication Date: 2020-06-09
苏州艾捷博雅生物电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of the above-mentioned composite microspheres is nano-scale, the particle size is small

Method used

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  • Magnetic mesoporous composite material as well as preparation method and application thereof
  • Magnetic mesoporous composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] Example 1: Preparation of Monodisperse Hydrophobic Coated Magnetic Beads

[0134] Add 1 g of silica-coated iron oxide magnetic beads (average particle size 0.3 micron, Suzhou Beaver Biomedical Engineering Co., Ltd.), add 30 ml of 0.1N hydrochloric acid, heat to 50 ° C for 3 hours; take out the magnetic beads with a magnetic rod , washed 3 times with pure water, and dried with hot air; mix the above-mentioned treated magnetic beads with the following reagents: 0.3 g of octyltrimethoxysilane, 0.2 g of tetraethoxy silicon, 0.1 g of pure water, and 10 ml of toluene; Heated to reflux for 15 hours; the treated magnetic beads were taken out with a magnetic rod, and washed with ethanol and methanol for 3 times, 5 ml each time; vacuum-dried to obtain 1.3 g of monodisperse, hydrophobic magnetic beads (LM).

Embodiment 2

[0135] Example 2: Preparation of hydrophobic polymer-coated magnetic beads

[0136]Add 1 g of silica-coated iron oxide magnetic beads (average particle size 3 microns), add 30 ml of 0.1N hydrochloric acid, heat to 50°C for 3 hours; remove the magnetic beads with a magnetic rod, wash with pure water 3 times, and Blow dry; mix the above treated magnetic beads with the following reagents: 0.3 g of vinyltrimethoxysilane, 0.1 g of tetraethoxy silicon, 0.1 g of pure water, 10 ml of toluene; heat and reflux for 15 hours; The treated magnetic beads were taken out, washed with ethanol and methanol for 3 times, 5 ml each time; vacuum-dried to obtain 1.2 g of monodisperse, hydrophobic magnetic beads (LM2). Take 1 g of LM2, 0.1 g of AIBN, and 5 ml of n-hexane. After mixing, remove the n-hexane by rotary evaporation at room temperature; add 0.8 g of styrene, 0.4 g of divinylbenzene, and 20 ml of toluene; hour; the treated magnetic beads were taken out with a magnetic bar, washed with n-he...

Embodiment 3

[0137] Example 3: Preparation of block copolymer of divinylbenzene and pyrrolidone with magnetic mesoporous

[0138] Add 200 milliliters of pure water and 1 gram of hydroxypropyl cellulose to a 1-liter reaction flask, heat to dissolve and cool to below 40°C; take 1.3 grams of LM (prepared in Example 1), 15 grams of divinylbenzene, and 10 grams of ethylene Pyrrolidone, 0.2 g of AIBN, 20 g of toluene, stir well and add to the above aqueous solution, stir the suspension to 500 rpm, gradually raise the temperature to 75°C, keep stirring and temperature for 20 hours; filter, wash with ethanol, extract with n-hexane After vacuum drying, disperse in ethanol, suck out the magnetic material with a magnetic rod, and obtain 16 grams of brown particles after vacuum drying, with a particle size of about 20-60 microns, an average pore diameter of about 5 nanometers, and a pore volume of 0.6 mL / g. The surface is 572 square meters per gram (tested by BET method), and the nitrogen content is 1...

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Abstract

The invention discloses a magnetic mesoporous composite material as well as a preparation method and application thereof. The magnetic mesoporous composite material particle comprises at least one non-porous or microporous magnetic particle and a mesoporous polymer skeleton penetrating through the composite material particle, and the polymer skeleton is a mesoporous polymer layer with at least twocharacteristic microstructural domains. The magnetic mesoporous composite material combines the advantages of a multi-microstructural-domain extraction material and a magnetic material, and can achieve better selective separation of target molecules by utilizing multiple effects of molecular exclusion, Van der Waals' force, dipole action, ion exchange and the like.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a magnetic mesoporous composite material and its preparation method and application, especially the application in the field of adsorption separation (such as solid phase extraction). Background technique [0002] As a traditional extraction technique, solid phase extraction has the advantages of high separation efficiency, high recovery rate and simple pretreatment process, and is widely used. Solid phase extraction can be divided into extraction column extraction and stationary phase dispersive extraction. Extraction column extraction is to fill the solid adsorption material in the extraction column to form a stationary phase. There is a filter plate on the upper and lower sides of the stationary phase. The sample solution to be analyzed flows through the stationary phase to selectively extract or adsorb the detected components or interfering substances. To achieve...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/26B01J20/30B01J13/06B01D15/08
CPCB01J20/28009B01J20/28083B01J20/26B01J20/103B01J13/06B01D15/08
Inventor 汪群杰冯俊雄
Owner 苏州艾捷博雅生物电子科技有限公司
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