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Homopolymer nanometer vesicle as well as preparation method and application thereof

A technology of nanovesicles and homopolymers, applied in botany equipment and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., can solve the problems of long-term preservation, low catalytic performance, cumbersome preparation steps, etc., to achieve Conducive to long-term storage, good structural stability, and simple preparation steps

Active Publication Date: 2014-09-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Metal nanoparticles such as nano-silver have been proven to have good catalytic performance, but they are easy to agglomerate and easy to be oxidized, which greatly reduces their catalytic performance and cannot be stored for a long time
Therefore, it is very valuable to find a carrier that can preserve nano-silver for a long time, and some specific polymer vesicles just meet these criteria, but most of the copolymer vesicles are used as templates to prepare nano-silver, not only the preparation steps are cumbersome, And the catalytic performance is not high

Method used

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  • Homopolymer nanometer vesicle as well as preparation method and application thereof
  • Homopolymer nanometer vesicle as well as preparation method and application thereof
  • Homopolymer nanometer vesicle as well as preparation method and application thereof

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preparation example Construction

[0044] The preparation method of the above-mentioned homopolymer nanovesicles comprises the following steps:

[0045] (1) Synthetic steps of homopolymer:

[0046] The organic solvent is divided into two parts, 4,4'-diaminodiphenyl ether is dissolved in a part of the organic solvent, and the solution obtained after all the 4,4'-diaminodiphenyl ether is dissolved is used as the first solution, and then Dissolve pyromellitic dianhydride in another part of organic solvent to obtain a second solution, the molar ratio of 4,4'-diaminodiphenyl ether to pyromellitic dianhydride is 1:0.2~4, divide the second solution 2 to 8 equal parts are added to the first solution sequentially within 1 hour, and stirred at room temperature for 1 hour to obtain a homopolymer solution.

[0047] In this step, the second solution is divided into 2-8 equal parts, and then each equal part is added sequentially at the same time interval. This operation can control the progress of the reaction and make the ...

Embodiment 1

[0054] The organic solvent in this embodiment can be ethyl acetate, at this moment, the preparation method of homopolymer nanovesicle comprises the following steps:

[0055] (1) Synthetic steps of homopolymer:

[0056] Dissolve 1.000g (i.e. 5mmol) of 4,4'-diaminodiphenyl ether in 20mL of ethyl acetate and dissolve all the 4,4'-diaminodiphenyl ether as the first solution;

[0057] Then, dissolve 1.090g (that is, 5mmol) of pyromellitic dianhydride in 30mL of ethyl acetate and use the obtained solution as the second solution, divide the second solution into 3 equal parts, and divide the above 3 equal parts in turn within 1h. Parts were added to the above-mentioned first solution, and stirred at room temperature for 1 h to obtain an ethyl acetate solution containing a homopolymer.

[0058] (2) Preparation steps of homopolymer vesicles:

[0059] Dilute the homopolymer-containing ethyl acetate solution obtained in step (1) to 0.5 mg / mL, and drop 3 times the volume of ethyl acetate...

Embodiment 2

[0065] Compared with Example 1, the organic solvent in this example can be dimethylformamide, at this time, the preparation method of homopolymer nanovesicles comprises the following steps:

[0066] (1) Synthetic steps of homopolymer:

[0067] Dissolve 4.000g (i.e. 20mmol) of 4,4'-diaminodiphenyl ether in 50mL of dimethylformamide and dissolve all the 4,4'-diaminodiphenyl ether as the first solution;

[0068] Then, dissolve 4.360g (i.e. 20mmol) of pyromellitic dianhydride in 60mL of dimethylformamide and use the obtained solution as the second solution, divide the second solution into 4 equal parts, and dissolve the above-mentioned 4 equal portions were added to the first solution above, and stirred at room temperature for 1 h. A dimethylformamide solution containing the homopolymer was obtained.

[0069] (2) Preparation steps of homopolymer vesicles:

[0070] Dilute the homopolymer-containing dimethylformamide solution obtained in step (1) to 3 mg / mL, and add deionized wat...

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Abstract

The invention provides a homopolymer nanometer vesicle as well as a preparation method and application thereof. The homopolymer nanometer vesicle comprises a homopolymer vesicle and nano silver, wherein the homopolymer vesicle is formed by self-assembling of a homopolymer; nano silver is deposited on the homopolymer vesicle; the homopolymer is formed by polymerizing 4,4'-diaminodiphenyl ether and benzenetetracarboxylic anhydride in the mole ratio of 1 to (0.2-4); the mole ratio of nano silver to carboxyl in the homopolymer is (1-20) to 1. The preparation method of the homopolymer nanometer vesicle comprises the following steps: firstly, carrying out condensation polymerization on anhydride and amine with polyfunctionality at normal temperature so as to generate the homopolymer; then self-assembling the homopolymer to obtain the homopolymer vesicle; and finally, depositing nano silver on the homopolymer vesicle so as to obtain the homopolymer nanometer vesicle. The homopolymer nanometer vesicle is simple and convenient in preparation process, is short in preparation cycle, has pH responsiveness, is relatively high in stability and catalysis, and has wide application prospects in the fields of catalysis and antibiosis.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a vesicle and a preparation method and application thereof. Background technique [0002] In recent years, scientists from various countries have maintained a strong interest in polymer self-assembly technology. Many novel structures with great application potential can be formed through self-assembly technology, such as micelles, vesicles, disc structures, worms, etc. shape structure, [0003] Rod structure etc. Among them, polymersomes have great advantages over other structures due to the existence of their central cavity. Due to the different groups contained in the polymer, the polymersome can respond intelligently to changes in the external environment, such as the shape, shape, The structure or composition will change accordingly. It is these intelligent responsiveness that make polymersomes have wide application potential in many fields, such as drug carriers, microreac...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J23/44B01J32/00A01N59/16A01P1/00B82Y30/00B82Y40/00C07C215/80C07C213/00C08G73/10
Inventor 杜建忠孙辉
Owner TONGJI UNIV
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