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Preparation method of magnetic temperature-sensitive nanoparticles

A magnetic nanoparticle and nanoparticle technology, applied in the field of preparation of magnetic temperature-sensitive nanoparticles, can solve the problems of wide particle size distribution of magnetic temperature-sensitive nanoparticles, magnetic nanoparticle coagulation, unfavorable application process control, etc., and achieve detailed data Accurate, anti-coagulation, strict process effect

Active Publication Date: 2014-05-07
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0004] At present, the preparation of magnetic temperature-sensitive nanoparticles is still in research, and there are still many shortcomings, such as complicated and cumbersome steps, the need to prepare magnetic nanoparticles in advance, and then combine with temperature-sensitive polymers; graft temperature-sensitive monomers on the surface of magnetic nanoparticles , easily lead to mutual attraction of magnetic nanoparticles and coagulation; the particle size distribution of the prepared magnetic temperature-sensitive nanoparticles is wide, which is not conducive to the application process control, which greatly limits the application of magnetic temperature-sensitive nanoparticles

Method used

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Embodiment Construction

[0070] The present invention will be further described below in conjunction with accompanying drawing:

[0071] figure 1 As shown in the figure, it is the preparation state diagram of the graft polymerization of magnetic temperature-sensitive nanoparticles. The position and connection relationship of each part must be correct, and the ratio should be adjusted according to the amount, and the operations should be performed in sequence.

[0072] The preparation of the graft polymerization of magnetic temperature-sensitive nanoparticles is carried out in a four-neck flask, and is completed under water bath, heating, stirring, water circulation condensation, and nitrogen protection;

[0073] The water bathtub 1 is rectangular, and the lower part of the water bathtub 1 is an electric heating dish 2, and a four-necked flask 3 is placed on the upper part of the water bathtub 1, and is fixed by a fixed frame 12; a nitrogen pipe 4 is arranged on the upper part of the four-necked flask ...

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Abstract

The invention relates to a preparation method of magnetic temperature-sensitive nanoparticles. Aiming at the deficiencies of magnetic nanoparticles, the magnetic temperature-sensitive nanoparticles are prepared by the following steps: firstly, silylanizing the magnetic nanoparticles; and then carrying out graft polymerization, ultrasonic dispersion, washing and extraction, and vacuum drying. The preparation method is strict in process, advanced and reasonable, full and accurate in data and good in shape of products which are ash black powder particles, wherein the particle diameter of the powder is less than or equal to 220nm. The magnetic nanoparticles have remarkable superparamagnetism and a carbon wrapping layer is arranged on the surface to prevent mutual attraction among the nanoparticles in the application process to lead to coagulation. The product is remarkable in temperature-sensitive effect, high in purity which reaches 99% and high in yield which reaches 97.5%. The preparation method is a very ideal method for preparing the magnetic temperature-sensitive nanoparticles. The product can be applied to the fields such as medicines, bioengineering and various industries.

Description

technical field [0001] The invention relates to a method for preparing magnetic temperature-sensitive nanoparticles, which belongs to the technical field of preparation and application of magnetic field and temperature environment-responsive nanoparticles. Background technique [0002] Environmentally responsive nanoparticles are special functional nanoparticles that can respond quickly to special stimuli from the external environment, such as temperature, pH, ionic strength, pressure, electric field, and magnetic field. Particles; due to the unique physicochemical and colloidal properties of smart nanoparticles, they have great application value. [0003] Magnetic temperature-sensitive nanoparticles are nanoparticles with magnetic field and temperature effects, which can be easily and quickly separated from the medium under the action of an external magnetic field. Since the temperature-sensitive polymer has the lowest critical solution temperature in aqueous solution, it w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/54C08F222/38
Inventor 刘旭光陈琳杨永珍李龙飞许并社
Owner TAIYUAN UNIV OF TECH
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