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Amphiphilic polymer nano particle for detecting mercury ion and preparation method and application thereof

A technology of amphiphilic polymers and nanoparticles, which is applied in the fields of chemical instruments and methods, color/spectral characteristic measurement, and analysis through chemical reactions of materials, which can solve the problems of unfavorable metal ion detection applications, low detection sensitivity, The detection system is unstable and other problems, achieving the effect of stable structure, less dosage and convenient post-processing

Active Publication Date: 2014-06-04
嘉善县国创新能源研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most small-molecule sensors are not water-soluble, which is not conducive to the detection of metal ions in water and biological environments; and most of the water-soluble small-molecule sensors have low quantum yields in water, so the detection sensitivity is not high; In addition, Small organic molecule systems are often biologically toxic and prone to self-aggregation, which leads to instability of the detection system

Method used

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  • Amphiphilic polymer nano particle for detecting mercury ion and preparation method and application thereof
  • Amphiphilic polymer nano particle for detecting mercury ion and preparation method and application thereof
  • Amphiphilic polymer nano particle for detecting mercury ion and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0035] (1) Amphiphilic copolymer polyethylene oxide- b -poly(styrene- co - p-chloromethyl styrene) [referred to as PEO-b-P (St-co-VBC)] synthesis: 0.50g (0.1mmol) polyethylene oxide macromolecular chain transfer reagent, 4.16g (40mmol) styrene, 1.22 g (2mmol) p-chloromethylstyrene, 4.69mg (0.028mmol) azobisisobutyronitrile (AIBN) and 5ml dimethylformamide DMF are placed in a reaction bottle, and nitrogen gas-vacuumization is repeated three times at low temperature , sealed, and reacted in an oil bath at 90 degrees for 4 hours. The product was precipitated in a mixed solvent of petroleum ether and diethyl ether with a volume ratio of 1:1, then dissolved in dichloromethane, and repeated three times to remove unreacted monomers and small molecular impurities, and vacuum-dried to obtain the desired product.

[0036] (2) Synthesis of amphiphilic rhodamine B graft copolymer: 200mg of the above-prepared amphiphilic copolymer PEO-b-P (St-co-VBC) was dissolved in 10ml of tetrahydrofu...

Embodiment 2

[0038] Example 2: The particle size and distribution of the amphiphilic polymer nanoparticles prepared in Example 1 were tested.

[0039] The specific test instrument is Malvern Nano-ZS90 laser particle size analyzer, the test concentration is (0.4g / L), the test temperature is 25oC, the results figure 1 As shown, the results show that the prepared amphiphilic polymer nanoparticles have a particle size of about 20nm, and the monodispersity of the particles is good.

Embodiment 3

[0040] Embodiment 3: detection experiment of mercury ion.

[0041] (1) Take 12 5ml sample bottles, add 3ml of the amphiphilic polymer nanoparticles with a concentration of (0.4g / L) obtained in Example 1, and then add the mercury ion aqueous solution with a concentration of 0~0.24mol / L 3ul were added to 12 sample vials. After stirring for 3 minutes at room temperature, the absorption spectrum and fluorescence emission spectrum of these samples were sequentially measured (excitation wavelength is 520nm). The result is as figure 2 and image 3 . The measurement results show that the absorption intensity and fluorescence intensity of the amphiphilic polymer nanoparticles gradually increase with the increase of the mercury ion concentration, and when the mercury ion concentration is > 5 μmol / l, the fluorescence intensity of the amphiphilic polymer nanoparticles There is a significant increase.

[0042] (2) Take 12 5ml sample bottles, add 3ml of the amphiphilic polymer nanopar...

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Abstract

The invention discloses an amphiphilic polymer nano particle for detecting mercury ions and a preparation method and an application of the amphiphilic polymer nano particle. The amphiphilic polymer nano particle is prepared by reprecipitating a prepared amphipathy rhodamine B grafted copolymer into water by using a simple reprecipitation method under an ultrasonic condition. The prepared amphipathy rhodamine B grafted copolymer is prepared by grafting ethidene diamine sulfo-lactam rhodamine B into an amphiphilic polymer polyoxyethylene-b-poly(styrene-co-p-chlorine alpha-methylstyrene) through methylation. The amphiphilic polymer nano particle has good dispersity and small size in water, and can achieve fluorescence and colorimetric change detection on mercury ions in water with high sensitivity and high selectivity. Compared with the prior art, the amphiphilic polymer nano particle can achieve rapid detection on micro mercury ions in a pure water medium, is simple in synthesis route, convenient to use and small in use amount, is applicable to amplification synthesis and practical production application, and has a wide application prospect in the field of biologic and environment detection.

Description

technical field [0001] The invention relates to the technical field of material preparation and biological and environmental ion detection, in particular, it relates to amphiphilic polymer nanoparticles with the function of detecting mercury ions through fluorescence and colorimetric changes and a preparation method thereof, and the amphiphilic polymer Application of nanoparticles to the detection of mercury ions in water. Background technique [0002] Mercury is a highly toxic heavy metal element widely present in the environment and distributed in all corners of the globe. Elemental Hg and Hg 2+ After being discharged into the environment, it can be converted into methylmercury by aquatic microorganisms, which can be enriched in organisms and finally absorbed by the human body through the food chain. After reaching the human body, it will damage the human central nervous system and cause severe nausea. , vomiting, abdominal pain, and severe renal damage, causing a huge i...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F212/08C08F212/14C08F8/34C08F6/10C07D491/107C09K11/06G01N21/78G01N21/64G01N21/31
Inventor 陈建钟维邦孙祥李亚候庆扬易平贵
Owner 嘉善县国创新能源研究院
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