Preparation method of fly ash superbead magnetic composite material surface imprinting adsorbent

A technology of magnetic composite materials and fly ash microbeads, which is applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., to achieve the effects of non-destructive, high mechanical strength, and high adsorption capacity

Inactive Publication Date: 2012-02-15
JIANGSU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The study of immobilizing MO on the surface of inorganic materials or coating the periphery of inorganic materials with polymer materials to prepare magnetic composite materials, and then imprinting and modifying the surface of magnetic composite materials to obtain magnetically imprinted polymeric adsorbents has not been reported yet.

Method used

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  • Preparation method of fly ash superbead magnetic composite material surface imprinting adsorbent
  • Preparation method of fly ash superbead magnetic composite material surface imprinting adsorbent
  • Preparation method of fly ash superbead magnetic composite material surface imprinting adsorbent

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Embodiment 1

[0031] (1) Amino and aldehyde modification of fly ash

[0032] The fly ash microbeads are treated by acidification, roasting, etc. to obtain activated floating beads; according to the ratio of 3.0g fly ash per 100ml of toluene, the activated fly ash is dispersed in toluene, and the proportion of 1.0ml per gram of fly ash is Add 3-aminopropyltriethoxysilane proportionally, stir and react at 70°C for 12h, then wash the product with absolute ethanol and deionized water, and dry it under vacuum at 60°C. According to the ratio of adding 10ml of phosphate buffer solution (pH=7.0) and 2.0ml of glutaraldehyde (25%, v / v) per gram of aminated fly ash, soak the dried aminated fly ash in the above mixed solution , After reacting for 6.0 h, the product was washed with deionized water and dried under vacuum at 60°C.

[0033] (2) Preparation of Magnetic Fly Ash Microbeads Composite

[0034] Weigh chitosan according to the ratio of 2.0 / 100 (g / ml) and disperse it in 0.1mol / L acetic acid, st...

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Abstract

The invention relates to a preparation method of a fly ash superbead magnetic composite material surface imprinting adsorbent. The invention belongs to the technical field of environmental material preparation. Through a microemulsion method, cross-linked chitosan is used for coating nano-grade gamma-Fe2O3 and micrometer-grade ball-shaped fly ash superbeads, such that the fly ash superbead magnetic composite material is obtained; the fly ash superbead magnetic composite material is adopted as a substrate, molecularly imprinted polymer modification is carried out on the surface of the substrate through a suspension polymerization method; template molecules bisphenol A are eluted, such that the fly ash superbead magnetic composite material surface imprinting adsorbent is obtained. The ball-shaped imprinting adsorbent has substantial thermal and magnetic stabilities. 1H-NMR shows that hydrogen bonding among the molecules is an identification framework of the imprinting adsorbent. As a result of a static absorbing experiment, the fly ash superbead magnetic composite material surface imprinting adsorbent provided by the invention has relatively high adsorption capacity, rapid adsorption dynamic property and substantial BPA molecule identification performance.

Description

technical field [0001] The present invention relates to a kind of chitosan / γ-Fe 2 o 3 The invention discloses a method for preparing a molecularly imprinted polymeric adsorbent on the surface of a fly ash microbead magnetic compound, which belongs to the technical field of environmental material preparation. Background technique [0002] Molecular imprinting technology uses the target molecule as a template molecule, combines structurally complementary functional monomers with the template molecule through covalent or non-covalent bonds, and adds a cross-linking agent for polymerization reaction. After the reaction is completed, the template molecule is eluted Come out to form the technology of Molecularly Imprinted Polymers (MIPs) with special structure and specific adsorption to template molecules. Surface molecular imprinting technology, by establishing molecular recognition sites on the surface of the matrix material, can better solve some serious defects in the tradit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C08F220/06C08F222/14C08F2/20C08J9/26
Inventor 潘建明胡玮徐龙城戴江栋李秀秀李春香闫永胜
Owner JIANGSU UNIV
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