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Preparation method of composite fluorescent hydrogel and application of composite fluorescent hydrogel in detection of iron ions in water

A composite fluorescence and hydrogel technology, applied in fluorescence/phosphorescence, general water supply saving, chemical instruments and methods, etc., can solve the problems of poor stability of fluorescent probes, inconvenient to carry, insoluble in water, etc., and achieve excellent mechanical properties. Strength, ease of operation, and low-cost effects

Active Publication Date: 2021-03-09
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, most of the current fluorescent probes are used in liquid form. Liquid fluorescent probes have many problems such as poor stability, poor solubility in water, and inconvenient portability.
By loading the fluorescent probe into a material with good portability, good flexibility, certain mechanical properties and hydrophilicity, the relevant research on how to play the role of the fluorescent probe better and more practically has not been reported yet.

Method used

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  • Preparation method of composite fluorescent hydrogel and application of composite fluorescent hydrogel in detection of iron ions in water
  • Preparation method of composite fluorescent hydrogel and application of composite fluorescent hydrogel in detection of iron ions in water
  • Preparation method of composite fluorescent hydrogel and application of composite fluorescent hydrogel in detection of iron ions in water

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A method for preparing P(BAcF-AM) / PEG composite fluorescent hydrogel, comprising the steps of:

[0033] (1) Preparation of BAcF:

[0034] Dissolve 4 g (0.012 mmol) of spironolactone-type fluorescein (CAS number: 2321-07-5) in dichloromethane, blow nitrogen gas, add triethylamine, and slowly add 1 mL dropwise to fluorescein under ice-bath conditions (0.012mmol) acryloyl chloride (control drop time is 30min) after stirring at room temperature for 12 hours, first use a rotary evaporator to remove dichloromethane, then wash with acetone to filter triethylamine hydrochloride, and finally wash with water repeatedly After settling and suction filtration, the filter residue was freeze-dried for 48 hours to obtain the product acryloyloxyfluorescein (BAcF). Characterization of BAcF by infrared spectroscopic testing, such as figure 1 As shown by the curve a in the middle;

[0035] (2) Preparation of P(BAcF-AM) / PEG composite fluorescent hydrogel:

[0036] (a) Prepare an acrylam...

Embodiment 2

[0044] A preparation method of P(BAcF-AM) / PEG composite fluorescent hydrogel is as follows:

[0045] (1) Preparation of BAcF:

[0046] The amount of acryloyl chloride added was 2mL (the molar ratio of spironolactone fluorescein and acryloyl chloride was 1:2), and the other steps were the same as the preparation method in step (1) of Example 1, and the BAcF was characterized by infrared spectroscopy, Such as figure 1 As shown in the middle b curve;

[0047] (2) Preparation of P(BAcF-AM) / PEG composite fluorescent hydrogel:

[0048] (a) Prepare an acrylamide solution with a monomer concentration of 5 mol / L, weigh and add 0.2% by mole of the cross-linking agent BIS, 0.5% by mole of the initiator APS and 5% by weight of PEG-6000, the above solution Stir magnetically at room temperature for 5 minutes, weigh 0.1% by weight BAcF and dissolve it in 1mL DMSO evenly, mix the above two solutions evenly, transfer the whole into a three-necked flask, and pass nitrogen gas for 5 minutes; ...

Embodiment 3

[0054] A preparation method of P(BAcF-AM) / PEG composite fluorescent hydrogel is as follows:

[0055] (1) Preparation of BAcF:

[0056] The amount of acryloyl chloride added is 4mL (the molar ratio of spironolactone fluorescein and acryloyl chloride is 1:4), the others are the same as the preparation method in step (1) of Example 1, and the BAcF is characterized by infrared spectroscopy, such as figure 1 As shown in the curve of c;

[0057] (2) Preparation of P(BAcF-AM) / PEG composite fluorescent hydrogel:

[0058] (a) Prepare an acrylamide solution with a monomer concentration of 7mol / L, weigh and add 0.1% by mole of crosslinking agent BIS, 1% by mole of initiator APS and 8% by weight of PEG-6000, the above solution Stir magnetically at room temperature for 5 minutes, weigh 0.1% by weight BAcF and dissolve it in 1mL DMSO evenly, mix the above two solutions, transfer the whole into a three-necked flask, and pass nitrogen gas for 5 minutes;

[0059] (b) Add 46 μL TEMED to the ...

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Abstract

The invention discloses a preparation method of composite fluorescent hydrogel and application of the composite fluorescent hydrogel in detection of iron ions in water, and belongs to the technical field of preparation and application of functional materials. Spironolactone fluorescein and acryloyl chloride are used as raw materials, and acryloyloxy fluorescein is obtained through acylating chlorination reaction; then, acryloyloxy fluorescein, acrylamide, and PEG (6000) carry out free radical copolymerization under an ammonium persulfate-N,N,N',N'-tetramethyl ethylene diamine (APS-TEMED) redoxinitiation system. The prepared composite fluorescent hydrogel can interact with Fe<3+> and can be used for detecting Fe<3+>, the lowest detection limit of Fe<3+> is 4.4 [mu]mol / L, and the fluorescence intensity of the fluorescent hydrogel and the concentration of Fe<3+> are in a linear relationship within 32-192 [mu]mol / L. The prepared composite fluorescent hydrogel is convenient to carry, low in production cost, green and efficient, and the application range of the fluorescent hydrogel in the fields of environment monitoring and detection and bio-medicine is widened.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of functional materials, and in particular relates to the preparation of a composite fluorescent hydrogel and its application in the detection of iron ions in water. Background technique [0002] Metal cations are one of the main pollutants in the industrial production process. Once they enter the water body or soil, they are difficult to remove, and even cause permanent pollution. Metal cation pollution is cumulative, hysteresis and concealment. It is harmful to humans and other species. serious threat to health. Iron is widely used in industrial production and is an indispensable metal in people's lives. It is also one of the most important elements in the body's metabolism. Its deficiency and beyond the normal range will cause serious diseases. Although it has been developed A variety of methods for detecting iron ions have been proposed, but they all have the disadvantages...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L33/26C08L71/02C08F220/56C08F220/32C08F222/38C09K11/06G01N21/64
CPCC08J3/075C08F220/56C09K11/06G01N21/643C09K2211/145C08J2333/26C08J2471/02C08F220/32C08F222/385Y02A20/20
Inventor 王沛吴启迪朱金妹
Owner DALIAN MARITIME UNIVERSITY
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