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Core-shell type composite micro-nanoparticles and preparation method thereof

A micro-nano particle, core-shell technology, used in chemical instruments and methods, special compound water treatment, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of high temperature operation, harsh conditions, and complexity. Achieve the effects of mild reaction conditions, low cost and simple process

Active Publication Date: 2018-12-21
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, TiO is usually treated by the "grafting to" method and the "grafting from surface" method. 2 To achieve modification, although the "grafting from the surface" method is an ideal method that can achieve high density, it needs to fix the initiator on the surface of the inorganic particles. Defects such as high temperature and complicated operation

Method used

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  • Core-shell type composite micro-nanoparticles and preparation method thereof
  • Core-shell type composite micro-nanoparticles and preparation method thereof
  • Core-shell type composite micro-nanoparticles and preparation method thereof

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[0022] A method for preparing core-shell composite micro-nano particles, using fluorene monomers as raw materials, preparing polyfluorene micro-nano particles through a solid-phase oxidation coupling method; performing a sulfonation reaction of the polyfluorene micro-nano particles with concentrated sulfuric acid , to obtain sulfonated micro-nano particles; the sulfonated micro-nano particles and tetra-n-butyl titanate are sequentially subjected to adsorption and hydrolysis reactions to obtain the core-shell type composite micro-nano particles.

[0023] Reaction principle: Polyfluorene micronanoparticles can undergo sulfonation reaction in concentrated sulfuric acid, grafted with sulfonic acid groups, polyfluorene micronanoparticles with sulfonic acid groups can adsorb tetra-n-butyl titanate, tetra-n-titanate Butyl esters can be hydrolyzed to TiO 2 ,TiO 2 Coating on the surface of polyfluorene micro-nano particles forms core-shell micro-nano particles.

[0024] It can be see...

Embodiment 1

[0040] Please refer to figure 1 , Embodiment 1 of the present invention is:

[0041] A core-shell type composite micro-nano particle, comprising an inner core layer 1 and a shell layer 2, the shell layer 2 is a titanium dioxide layer, the inner core layer 1 is a polyfluorene layer, the core-shell type composite micro-nano particle The particle size is 5-10 μm.

Embodiment 2

[0043] Please refer to figure 2 , Embodiment 2 of the present invention is a method for preparing core-shell composite micro-nano particles, comprising the following steps:

[0044] Step 1: Put 0.83g (5mmol) fluorene and 3.24g (20mmol) anhydrous ferric chloride into a glass mortar, grind with a pestle for half an hour at room temperature, and then wash the mixture with 5% hydrochloric acid ethanol solution , filtered and dried to obtain a crude product, and then extracted with absolute ethanol to obtain polyfluorene micro-nano particles.

[0045]Step 2: sulfonating the polyfluorene micro-nano particles with concentrated sulfuric acid to obtain sulfonated micro-nano particles. Specifically: first disperse polyfluorene micro-nano particles in absolute ethanol by ultrasonic dispersion, and then add concentrated sulfuric acid for sulfonation reaction. The time of the ultrasonic dispersion is at least 10 minutes, and the temperature of the sulfonation reaction is 40 ℃, the time ...

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Abstract

The invention discloses core-shell type composite micro-nanoparticles and a preparation method thereof. Each core-shell type composite micro-nanoparticle comprises an inner core layer and a shell layer, wherein the shell layer is a titanium dioxide layer; the inner core layer is a polyfluorene layer. The preparation method of the core-shell type composite micro-nanoparticles comprises the following steps: taking a fluorene monomer as a raw material; preparing through a solid-phase oxidative coupling method to prepare polyfluorene micro-nanoparticles; carrying out sulfonation reaction on the polyfluorene micro-nanoparticles and concentrated sulfuric acid to obtain sulfonated micro-nanoparticles; carrying out adsorption and hydrolysis reaction on the sulfonated micro-nanoparticles and tetra-n-butyl titanate in sequence to obtain the core-shell type composite micro-nanoparticles. The core-shell type composite micro-nanoparticles have the advantages of good photocatalysis effect, stable chemical performance and the like; the preparation method has the advantages of simple technology, energy saving and environment protection, low manufacturing cost and the like.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a core-shell composite micro-nano particle and a preparation method thereof. Background technique [0002] With the rapid development of the dye textile industry, the variety and quantity of dyes are increasing day by day, printing and dyeing wastewater has become one of the key pollution sources of the water system environment. Rhodamine B has been widely used in textile, leather, food coloring, cytochemical dyeing and so on. At the same time, it is also widely used in aquaculture and the preparation of insect repellents, fungicides and preservatives. However, scholars at home and abroad have found that rhodamine B and its metabolites (ie, colorless rhodamine B) are highly toxic, highly residual, highly carcinogenic and teratogenic. Related research topics such as the monitoring of Rhodamine B in the environment, toxicological effects, and the treatment of...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J35/02C02F1/30C02F101/36C02F101/38
CPCC02F1/30B01J31/38C02F2305/10C02F2101/38C02F2101/36B01J35/39B01J35/396B01J35/23B01J35/40
Inventor 白卫斌田肖姚日进徐艳莲林金火
Owner FUJIAN NORMAL UNIV
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