Heteroatom-doped polymer nano microsphere which can be produced in large quantity and has cavity structure and preparation method thereof

A technology of structural polymers and nano-microspheres, which is applied in the field of heteroatom-doped polymer nano-microspheres with a cavity structure and its preparation, which can solve the problems of difficult to achieve large-scale industrial applications, long reaction time, and high reaction temperature and other problems to achieve the effect of avoiding the process of template method, simple operation and simple process

Active Publication Date: 2019-09-27
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrothermal method also first prepares the prepolymer, and then polymerizes the prepolymer under hydrothermal conditions to obtain melamine-formaldehyde resin mi

Method used

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  • Heteroatom-doped polymer nano microsphere which can be produced in large quantity and has cavity structure and preparation method thereof
  • Heteroatom-doped polymer nano microsphere which can be produced in large quantity and has cavity structure and preparation method thereof
  • Heteroatom-doped polymer nano microsphere which can be produced in large quantity and has cavity structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Dissolve 0.063g (0.0005mol) melamine, 0.054g (0.0005mol) m-phenylenediamine, 0.047g (0.0003mol) 3,5-diaminobenzoic acid in 50mL water, add dropwise 0.2mL ammonia water, temperature 25°C, 500rpm Stir at a rotating speed until the solution turns into a brown suspension. Add 2mL formaldehyde solution, after about 40sec., the liquid turns from clear to cloudy. Keep the temperature and stir at 500rpm for 2h. After the reaction is completed, it is centrifuged, washed with 20% ethanol solution, dried, and observed with an electron microscope to obtain nitrogen-containing polymer nanospheres with a nitrogen content of about 30%. Particle size 116nm as figure 1 shown.

Embodiment 2

[0066] Dissolve 0.126g (0.001mol) melamine, 0.108g (0.001mol) m-phenylenediamine, 0.047g (0.0003mol) 3,5-diaminobenzoic acid in 50mL acetone, add 0.2mL ammonia water dropwise, at 25°C, Stir at a stirring speed of 500 rpm until the solution becomes a brown suspension. Add 2mL aqueous formaldehyde solution, after about 3 sec., the liquid turns from clear to cloudy. Keep the temperature and stir at 500rpm for 2h. After the reaction is completed, it is centrifuged, washed with 20% ethanol solution, dried, and observed with an electron microscope to obtain nitrogen-containing polymer nanospheres with a nitrogen content of about 40%. Particle size 547nm as figure 2 shown.

Embodiment 3

[0068] Dissolve 0.126g (0.001mol) melamine, (0.001mol) m-phenylenediamine, 0.047g (0.0003mol) 3,5-diaminobenzoic acid in 50mL acetone, add ammonia water dropwise, temperature 25°C, stirring speed 500rpm Stir until the solution turns into a brown suspension. Add 2mL formaldehyde solution, after about 7sec., the liquid turns from clear to cloudy. Keep the temperature and stir at 500rpm for 2h. After the reaction is completed, it is centrifuged, washed with 20% ethanol solution, dried, and observed with an electron microscope to obtain nitrogen-containing polymer nanospheres with a nitrogen content of about 40%. Change the amount of ammonia water (0.4mL), as shown in Figure 3.

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Abstract

The invention discloses a heteroatom-doped polymer nano microsphere with a core-shell structure and a preparation method thereof. The method overcomes lots of defects such as complexity and limitation of a template method, adopts mild reaction temperature (room temperature) and takes melamine, arylamine and aldehyde as raw materials, in the presence of 3,5-diaminobenzoic acid or 2,4-aminobenzene sulfonic acid, by utilizing the difference of the reaction rates of reactants in an acetone-water mixing system or a pure acetone system, Schiff base is generated by aldehyde and a general formula 3,5-diaminobenzoic acid or 2,4-aminobenzene sulfonic acid, the aromatic amine is added with the generated Schiff base to prepare a coated nano microsphere, and the nano microsphere with the core-shell structure is obtained by soaking or washing in different solvents. The process method is simple to operate, mild in condition and rapid in reaction; the nano microsphere product prepared by utilizing the method is controllable in size and morphology, uniform in particle size, uniform in dispersion, large in yield and capable of making heteroatom doping uniform and making material toughness enhanced. The method has a very good application prospect.

Description

technical field [0001] The invention belongs to the technical field of new nanometer materials, and in particular relates to a heteroatom-doped polymer nanometer microsphere with a cavity structure and a preparation method thereof. Background technique [0002] Nanospheres with a cavity structure are widely used in reality, and mainly include two structures: one is a core-shell structure microsphere, and the other is a hollow sphere. Core-shell nanospheres refer to nanoparticles composed of a shell and a core closely related to each other. The composition of the core-shell can be organic, inorganic, or biomass, etc., thus forming a variety of nanoparticles with different structures. Various properties of balls, such as optical, magnetic, electronic, mechanical and chemical properties. The hollow ball has the characteristics of a special hollow structure and a large internal cavity. These nanospheres with hollow structures can be widely used in many fields such as batterie...

Claims

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Application Information

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IPC IPC(8): C08G12/34H01M4/583H01M4/62H01G11/36
CPCC08G12/34H01G11/36H01M4/583H01M4/625Y02E60/10
Inventor 吕荣文林华刘盈岑刘明辉
Owner DALIAN UNIV OF TECH
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