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Nano-polymer capsules embedded with oxygen-sensitive fluorescent indicator as well as preparation and application thereof

A fluorescent indicator and nanopolymer technology, which is applied in fluorescence/phosphorescence, luminescent materials, material analysis by optical means, etc., can solve the problems of indicator leakage, difficult to precisely control the pore structure of membrane matrix, and easy leakage of indicators. , to solve the effect of easy leakage

Active Publication Date: 2017-03-15
杭州浸格科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the problems that the pore structure of the membrane matrix is ​​difficult to be precisely controlled and the indicator is easy to leak in the oxygen-sensitive fluorescent membrane prepared by the existing sol-gel method, the high-performance oxygen-sensitive fluorescent membrane prepared by the present invention can be used without affecting the optical properties of the indicator. At the same time, the leakage problem of the indicator is solved

Method used

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  • Nano-polymer capsules embedded with oxygen-sensitive fluorescent indicator as well as preparation and application thereof
  • Nano-polymer capsules embedded with oxygen-sensitive fluorescent indicator as well as preparation and application thereof
  • Nano-polymer capsules embedded with oxygen-sensitive fluorescent indicator as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Preparation of fluorine-free nanopolymer capsules embedded with oxygen-sensitive fluorescent indicators with a core-shell ratio of 1:1, with an average particle size of 218.6 nm, and the specific steps are as follows:

[0058] 0.30 g of amphiphilic macromolecular RAFT reagent and 49.70 g of deionized water were prepared into an aqueous solution as the water phase, and 3.55 g of methyl methacrylate, 1.42 g of p-divinylbenzene, and 0.07 g of azobisisobutyl were added. An oil phase composed of nitrile, 4.94 grams of paraffin wax and 0.02 grams of tris(4,7-biphenyl-1,10-phenanthroline) ruthenium dichloride was mixed uniformly, and ultrasonically pulverized for 20 minutes to prepare a fine emulsion. The miniemulsion was subjected to RAFT active free radical miniemulsion polymerization at 160° C., reacted for 5 hours and then cooled to prepare fluorine-free nano polymer capsules embedded with oxygen-sensitive fluorescent indicators.

[0059] (2) To prepare an oxygen-sensitive ...

Embodiment 2

[0063] Preparation of fluorine-free nanopolymer capsules embedded with oxygen-sensitive fluorescent indicator with a core-shell ratio of 1:2, with an average particle size of 228.7nm, preparation of fluorine-free nanopolymer capsules with embedded oxygen-sensitive fluorescent indicator The specific steps of the oxygen-sensitive fluorescent film with a capsule concentration of 20% are as follows:

[0064] (1) Prepare an aqueous solution of 0.3 g of amphiphilic macromolecular RAFT reagent and 49.7 g of deionized water as the water phase, and add 4.72 g of methyl methacrylate, 1.89 g of p-divinylbenzene, and 0.09 g of azo An oil phase composed of diisobutyronitrile, 3.29 grams of paraffin and 0.01 grams of tris(4,7-biphenyl-1,10-phenanthroline) ruthenium dichloride and mixed uniformly, and then ultrasonically pulverized for 20 minutes to prepare a fine emulsion . The miniemulsion is subjected to RAFT active free radical miniemulsion polymerization at 160°C, and the reaction is 5 ho...

Embodiment 3

[0067] The method of this example is the same as that of example 2, except that the amount of amphiphilic macromolecule RAFT reagent is 0.32, 0.34, 0.36, and 0.38 grams, respectively. The particle size of the polymer capsule is adjusted and controlled by the model ZEN1600. The laser particle size analyzer tested the particle size of nano-polymer particles prepared with different amounts of RAFT reagents, and the average particle size was 215nm, 163.7nm, 152.9nm, 146.0nm respectively;

[0068] According to the method of Example 1, an oxygen-sensitive fluorescent film with a concentration of 20% of the nano polymer capsule prepared in this example was prepared.

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Abstract

The invention provides nano-polymer capsules embedded with an oxygen-sensitive fluorescent indicator and a preparation method thereof, and application thereof to preparation of an oxygen-sensitive fluorescent film. The oxygen-sensitive fluorescent indicator is embedded into the nano-polymer capsules by adopting an RAFT (Reversible Additive Fragment Transfer) fine emulsion polymerization method; a core-shell structure and a surface shape of the nano-polymer capsules embedded with the oxygen-sensitive fluorescent indicator can be accurately regulated and controlled, so that effective embedding of the oxygen-sensitive fluorescent indicator is realized and the problem that the oxygen-sensitive fluorescent indicator is easy to leak is solved; a foundation of accurately and rapidly realizing online detection of DO (Dissolved Oxygen) in real time by a dissolved oxygen sensor is obtained; and fluorinated / fluorine-free nano-polymer capsules are combined with a sol-gel technology, so that the nano-polymer capsules embedded with the oxygen-sensitive fluorescent indicator can be uniformly dispersed into a sol-gel matrix to prepare a high-performance sol-gel oxygen-sensitive fluorescent film.

Description

[0001] (1) Technical field [0002] The invention relates to a nano polymer capsule embedded with an oxygen-sensitive fluorescent indicator, a preparation method thereof, and application in preparing an oxygen-sensitive fluorescent film. [0003] (2) Background technology [0004] Dissolved Oxygen refers to the molecular oxygen dissolved in the water in the exchange or chemical reaction or biochemical reaction between the water body and the atmosphere. It is usually denoted as DO. The detection of dissolved oxygen concentration is of great significance in the fields of environmental monitoring, industrial production, clinical medicine, and aquaculture. [0005] Fiber optic dissolved oxygen sensor is an important method for measuring dissolved oxygen concentration. Because O 2 It is a natural quencher of some oxygen-sensitive fluorescent substances, and its quenching process is reversible, so most fiber optic dissolved oxygen sensors are based on the principle of oxygen-sensitive fluor...

Claims

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Application Information

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IPC IPC(8): C08F265/02C08F220/14C08F212/36C08F2/38C08J5/18G01N21/64C09K11/02C09K11/06
CPCC08F2/38C08F265/02C08J5/18C08J2351/00C09K11/025C09K11/06C09K2211/185G01N21/643G01N2021/6432G01N2021/6439C08F220/14C08F212/36
Inventor 孙志娟蒋春跃郭飞
Owner 杭州浸格科技有限公司
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