Magnetic composite material surface imprinting thermosensitive adsorbent, and preparation method and application thereof

A magnetic composite material and surface imprinting technology, applied in the direction of solid adsorbent liquid separation, separation method, chemical instrument and method, etc., can solve the problems of volume shrinkage, low adsorption capacity of rigid tea and limit wide application, etc., achieve rapid separation, reduce Effects of nonspecific adsorption, good magnetic and thermal response properties

Inactive Publication Date: 2012-07-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the temperature is higher than 32°C, the polymer chains aggregate through hydrophobic interactions, shrink in volume, and undergo phase transition. At present, temperature-sensitive molecularly imprinted gels have been reported, but their rigidit...

Method used

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  • Magnetic composite material surface imprinting thermosensitive adsorbent, and preparation method and application thereof
  • Magnetic composite material surface imprinting thermosensitive adsorbent, and preparation method and application thereof
  • Magnetic composite material surface imprinting thermosensitive adsorbent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Halloysite nanotubes (HNTs) activation method

[0028] Blocky halloysite nanotubes are ground and crushed through 100 sieves, and at 100 o Calcined at high temperature for 18 hours, then the halloysite nanotubes were 70 h in concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 1:3 o C was refluxed for 6.0h, and the final product was washed with twice distilled water to neutrality, at 60 o Dry at C for later use.

[0029] (2) Preparation of magnetic halloysite nanotube composites (MHNTs)

[0030] Activated halloysite nanotubes were mixed with ferric chloride hexahydrate (FeCl 3 ·6H 2 O), sodium acetate (NaAc) is ultrasonically dissolved and dispersed in ethylene glycol according to the mass ratio of 0.6: 0.25: 1.5, the amount of ethylene glycol added follows the ratio of 80ml per 1.0g of halloysite nanotubes, and the ultrasonic time is 2.0h; then, according to the ratio of 1.2g polyethylene glycol (PEG-1000) per 1.0g halloysite nanotube...

Embodiment 2

[0035] (1) Halloysite nanotubes (HNTs) activation:

[0036] Blocky halloysite nanotubes were ground and crushed through a 100 sieve, and the oC Calcined at high temperature for 24h, then the halloysite nanotubes were 80% in concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 1:4 o C was refluxed for 10h, and the final product was washed to neutrality with double distilled water, at 60 o Dry at C for later use.

[0037] (2) Preparation of magnetic halloysite nanotube composites (MHNTs):

[0038] Activated halloysite nanotubes were mixed with ferric chloride hexahydrate (FeCl 3 ·6H 2 O), sodium acetate (NaAc) is ultrasonically dissolved and dispersed in ethylene glycol according to the ratio of mass ratio 1.0: 0.4: 2.5, the amount of ethylene glycol added follows the ratio of 100ml per 1.0g of halloysite nanotubes, ultrasonic time 5.0h; then, according to the ratio of 1.8g polyethylene glycol (PEG-1000) per 1.0g halloysite nanotubes, add polyethy...

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Abstract

The invention relates to the technical field of preparation of environment functional materials, in particular to a magnetic composite material surface imprinting thermosensitive adsorbent, and a preparation method and the application thereof. The method comprises the following steps that: firstly, a ferroferric oxide/nerchinskite nanotube magnetic composite material is prepared by a solvent thermal synthesis method; secondly, the magnetic composite material is modified on ethenyl by using 3-(methacrylo) propyltrimethoxyl silane; and finally, the nerchinskite nanotube magnetic composite material is prepared by using the ethenyl-modified magnetic composite material as a substrate material, 2, 4, 5-trichlorophenol as a template molecule, methacrylate as a functional monomer, N-isopropylacrylamide as a thermosensitive functional monomer, ethylene glycol dimethacrylate as a cross-linking agent, and 2,2'-azodiisobutyronitrile as an initiator. The prepared thermosensitive imprinting adsorbent is obvious in thermal stability and magnetic stability, sensitive in magnetic effect and thermosensitive effect, relatively high in adsorption capacity, obvious in reversible absorption/release function along with temperature and obvious in tertiary calcium phosphate (TCP) molecule recognition performance.

Description

technical field [0001] The invention relates to the technical field of preparation of environmental functional materials, in particular to a temperature-sensitive adsorbent imprinted on the surface of a magnetic composite material and a preparation method and application thereof. Background technique [0002] Molecular imprinting is a technology for preparing three-dimensional cross-linked polymers with predetermined recognition function binding sites. The prepared molecularly imprinted polymers (MIPs) can specifically adsorb template molecules. Surface molecular imprinting technology establishes molecular recognition sites on the substrate. The surface of the material better solves some serious defects that still exist in the traditional molecular imprinting technology as a whole, such as too deep embedding of active sites, slow kinetic rate of mass transfer and charge transfer, and poor kinetic performance of adsorption-desorption. Jia, etc., and the commonly used matrix m...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01D15/00
Inventor 潘建明王柄戴江栋徐龙城李秀秀杭辉闫永胜
Owner JIANGSU UNIV
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