Superparamagnetism mesoporous silicon dioxide composite ball and preparing method thereof

A mesoporous silica and superparamagnetic technology, applied in the direction of magnetic properties of silica, silica, inorganic materials, etc., can solve the problems of low saturation magnetization, wide size distribution of silica composite particles, irregular shape, etc. , to achieve the effect of high content of magnetic substances, low equipment requirements, and strong external magnetic field responsiveness
CN101256864BInactive Publication Date: 2012-07-25JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2012-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

A superparamagnetism mesoporous silicon dioxide composite ball of the present invention and manufacture method thereof belong to nucleocapsid type technology field of magnetic nano particle. The shape of the composite ball is global; inner core being made of magnetic ferrite nano particle cluster, shell coating layer being made of mesoporous silicon dioxide; quality ratio of magnetic ferrite nanoparticle in particulate being 40-80%. Method of manufacturing has that producing magnetic ferrite nano particle is by using coprecipitation method; executing surface modification by adding oleic acidstirring; ultrasonic forming oil-in-water emulsion in the mix solution of ethyl orthosilicate and cyclohexane, cetyl trimethyl ammonium bromide as surfactant; ethyl orthosilicate hydrolytic condensation forming mesoporous silicon dioxide coating layer by adding ammonia spirit; finally taking off molding plate and getting products. Product of the invention has bigger specific surface area and stronger magnetic separation capacity, and has good dispersancy in water, and is further functionalization after being decorated at surface. The method of the present invention has simple process, and lower equipment requirement.
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Description

technical field

[0001] The invention belongs to the technical field of core-shell magnetic nanoparticles and a preparation method thereof; in particular, it relates to a superparamagnetic mesoporous silica composite sphere with high saturation magnetization and a preparation method thereof. Background technique

[0002] Since the researchers of Mobil Corporation synthesized mesoporous silica, this kind of mesoporous molecular sieve has brought infinite vitality to the synthesis and application of mesoporous solid materials. For example: Mesoporous materials can be used as microreactors for nanoparticles due to their adjustable nanoscale pore structure. In addition, due to its huge specific surface area and uniform pore size, mesoporous solid materials have important applications in catalysis, especially in catalyzing reactions involving large-volume molecules, mesoporous materials show better performance than zeolite molecular sieves. catalytic activity. Since the surface ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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