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Cross-linking adsorbent resin with ultrahigh magnetic property and preparation method thereof

A technology of ultra-high cross-linking and adsorption resin, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem of weak acid resistance of magnetic particle dispersion, achieve good adsorption, reduce processing costs, and enhance acid resistance.

Active Publication Date: 2011-05-11
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the existing problems in the preparation of the existing magnetic ultra-high cross-linked adsorption resin, the stability of the dispersion of magnetic particles and its poor acid resistance, the invention provides a magnetic ultra-high cross-linked adsorption resin and a preparation method thereof. A simple and easy method is used to pretreat the magnetic particles to enhance their anti-acid performance and make them evenly dispersed in the resin skeleton; a new monomer one-step method is used to prepare chlorine balls, which simplifies the synthesis steps of chlorine balls; after changing Linked reaction environment, so that the synthesis of magnetic ultra-high cross-linked adsorption resin can be realized

Method used

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  • Cross-linking adsorbent resin with ultrahigh magnetic property and preparation method thereof
  • Cross-linking adsorbent resin with ultrahigh magnetic property and preparation method thereof
  • Cross-linking adsorbent resin with ultrahigh magnetic property and preparation method thereof

Examples

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Embodiment 1

[0036] Using 20g ethyl orthosilicate and 20g oleic acid to 40g γ-Fe 2 O 3 Carry out double-layer wrapping. The oil phase consisted of 60 g of chloromethyl styrene, 4 g of divinylbenzene, 17 g of n-heptane, 17 g of toluene, and 2 g of benzoyl peroxide. Dissolve 2 g of gelatin and 3 g of polyvinyl alcohol in 500 g of water to form an aqueous phase. Add the oil phase and 40 g of magnetic particles into a three-necked flask, stir quickly while adding the water phase. The temperature was raised to 70°C to initiate the reaction, polymerization was carried out for 6 hours, and the temperature was gradually raised to 95°C, and the reaction was carried out for 6 hours. Centrifuge the obtained chlorine ball, wash with water, ethanol and acetone, add dichloroethane to swell after drying, and under the condition of nitrogen protection and external lye, add 60% sodium carbonate and 80% ferric chloride of resin mass , React at 80°C for 12 hours, and wash with ethanol and acetone to obtain ...

Embodiment 2

[0039] Using 35g ethyl orthosilicate and 35g vinyl trimethoxysilane to 35g Fe 3 O 4 Carry out double-layer wrapping. The oil phase is composed of 40 g chloromethyl styrene, 8 g divinylbenzene, 25 g n-heptane, 25 g liquid paraffin, and 2 g azobisisobutyronitrile. Dissolve 10g gelatin and 3g hydroxyethyl cellulose in 500g water to form an aqueous phase. Add the oil phase and 35 g of magnetic particles into a three-necked flask, stir quickly while adding the water phase. The temperature was raised to 70°C to initiate the reaction, polymerization was carried out for 2 hours, and then the temperature was gradually raised to 95°C, and the reaction was carried out for 2 hours. Centrifuge the obtained chlorine ball, wash with water, ethanol, acetone, add dichloroethane to swell after drying, and under the condition of nitrogen protection and external lye, add 80% sodium carbonate and 50% ferric chloride of resin mass , React at 80°C for 15 hours, and wash with ethanol and acetone to ...

Embodiment 3

[0042] 3g of stainless steel powder was double-wrapped with 3g of ethyl orthosilicate and 3g of sodium dodecylbenzene sulfonate. The oil phase is composed of 50 g chloromethyl styrene, 8 g divinylbenzene, 20 g n-heptane, 20 g isobutanol, 1 g azobisisobutyronitrile, and 1 g benzoyl peroxide. Dissolve 6g gelatin and 6g hydroxyethyl cellulose in 500g water to form an aqueous phase. Add the oil phase and 3 g of magnetic particles into a three-necked flask, stir quickly, and add the water phase at the same time. The temperature was raised to 75°C to initiate the reaction, polymerization was carried out for 4 hours, and then the temperature was gradually raised to 85°C, and the reaction was carried out for 1 hour. Centrifuge the obtained chlorine ball, wash with water, ethanol and acetone, add nitrobenzene to swell after drying, and under the condition of nitrogen protection and external lye, add 60% sodium carbonate and 40% aluminum chloride of resin mass, React at 85°C for 12 hou...

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Abstract

The invention discloses a magnetic ultrahigh cross-linking adsorbent resin and a preparation method thereof, belonging to the field of magnetic resin. The ultrahigh cross linking adsorbent resin provided by the invention is formed by a framework and magnetic particles wrapped in the framework, wherein the resin framework has the following basic structural formula that the saturation magnetization intensity of the resin is 0.1-10e mu / g; and the average particle size of the resin is 60-300 mu m. The resin provided by the invention is synthesized by adopting a suspension polymerization method and a reaction system comprises an oil phase, magnetic particles and a water phase, wherein the magnetic particles are wrapped in a double layer mode through a coupling agent and a dispersing agent, thereby enhancing the acid-resistant property and oil-phase dispersing property of the magnetic particles; chloromethyl styrene is adopted as a monomer to be synthesized into magnetic chlorine balls by adopting a one-step method; and then, a cross-linking reaction is carried out on the magnetic chlorine balls under the condition of nitrogen protection and in the presence of a buffer agent, thereby preparing the magnetic ultrahigh cross-linking adsorbent resin. The magnetic ultrahigh cross-linking adsorbent resin prepared by the invention can be applied to the elimination of organic pollutants in water, in particular to micro-pollution organic matters, and has wide application prospects in the fields of biological engineering, chemical analysis and the like.

Description

Technical field: [0001] The invention discloses a magnetic super-highly cross-linked adsorption resin and a preparation method thereof, more specifically a super-high cross-linked adsorption resin with magnetic particles wrapped inside and a preparation method thereof Background technique: [0002] In recent years, magnetic polymer materials have been widely used in many fields such as biomedical engineering, environmental micro-pollution removal, and rapid solid phase extraction due to their good separation performance. In these applications, the primary technical key is to ensure that the magnetic polymer material has a strong affinity and a high adsorption capacity for the target. The existing synthesis technology is mostly achieved by functional grouping on its surface. On the other hand, the increase in the specific surface area can also greatly increase the adsorption capacity. For example, the ultra-highly cross-linked adsorption resin that we are familiar with relies on i...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
Inventor 李爱民周庆张满成双陈冬唐松林李喆钦王梦乔徐子潇杨峰周扬
Owner NANJING UNIV
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