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Monodispersity polystyrene nanosphere and preparation method thereof

A technology of polystyrene nano and polystyrene spheres, which is applied in the field of monodisperse polystyrene nanospheres and its preparation, can solve the problems of uncontrollable particle size, cumbersome and complicated synthesis methods, etc., and enhance the ability to capture free radicals , Accelerate the polymerization rate and increase the effect of nucleation ratio

Active Publication Date: 2011-05-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are deficiencies in both the finished product and its synthesis method. First of all, the particle size of the finished product polystyrene nanospheres is not ideal, the polydispersity index is a little higher, and there is no self-assembly. into a closely arranged hexagonal configuration, which makes it difficult to be used in some specific applications, such as when it is used to make an ordered array of hollow spheres or a gas-sensitive or photosensitive sensor film with specific size requirements; secondly, to synthesize The method is not only cumbersome and complicated, but also has the defects of low yield and uncontrollable particle size, and it is easy to pollute the environment because the solvent contains acetone

Method used

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  • Monodispersity polystyrene nanosphere and preparation method thereof
  • Monodispersity polystyrene nanosphere and preparation method thereof
  • Monodispersity polystyrene nanosphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The concrete steps of preparation are:

[0021] Step 1, first mix styrene monomer, polystyrene microbeads, cetyl alcohol and octylphenol polyoxyethylene (10) ether according to the ratio of 98: 1.2: 1.98: 2.2 by weight and stir for 20 minutes, then add After adding water, continue to stir for 30 minutes to obtain a mixed solution; wherein, the polystyrene microbeads have a bead diameter of 3 mm, the water is distilled water (or deionized water), and the weight ratio between water and styrene monomer is 10.8:1.

[0022] In step 2, the mixed liquid is first placed under ultrasonic waves for 5 minutes, wherein the power of the ultrasonic waves is 120W, to obtain a fine emulsion. After passing nitrogen into the miniemulsion for 10 minutes, potassium persulfate was added thereto for 4 hours of polymerization reaction, wherein the flow rate of nitrogen gas was 100 ml / min, and the weight ratio between potassium persulfate and styrene monomer was 0.3:98. made approximately fi...

Embodiment 2

[0024] The concrete steps of preparation are:

[0025] Step 1, first mix styrene monomer, polystyrene microbeads, cetyl alcohol and octylphenol polyoxyethylene (10) ether according to the ratio of 99: 1.1: 1.99: 2.1 by weight and stir for 23 minutes, then add After adding water, continue to stir for 33 minutes to obtain a mixed solution; wherein, the polystyrene microbeads have a bead diameter of 4 mm, the water is distilled water (or deionized water), and the weight ratio between water and styrene monomer is 10.5:1.

[0026] In step 2, first place the mixed solution under ultrasonic waves for 6.5 minutes, wherein the power of the ultrasonic waves is 120W, to obtain a fine emulsion. After passing nitrogen into the miniemulsion for 13 minutes, potassium persulfate was added thereto for 4.5 hours of polymerization reaction, wherein the flow rate of nitrogen gas was 88 ml / min, and the weight ratio between potassium persulfate and styrene monomer was 0.3:99. made as figure 1 wit...

Embodiment 3

[0028] The concrete steps of preparation are:

[0029] Step 1, first mix styrene monomer, polystyrene microbeads, cetyl alcohol and octylphenol polyoxyethylene (10) ether according to the ratio of 100:1:2:2 by weight and stir for 25min, and then add After adding water, continue to stir for 35 minutes to obtain a mixed solution; wherein, the polystyrene microbeads have a bead diameter of 5 mm, the water is distilled water (or deionized water), and the weight ratio between water and styrene monomer is 10.3:1.

[0030]In step 2, the mixed liquid is first placed under ultrasonic waves for 8 minutes, wherein the power of the ultrasonic waves is 120W, to obtain a fine emulsion. After passing nitrogen into the miniemulsion for 15 minutes, potassium persulfate was added therein for 5 hours of polymerization reaction, wherein the flow rate of nitrogen was 75 ml / min, and the weight ratio between potassium persulfate and styrene monomer was 0.3:100. made approximately figure 1 with f...

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Abstract

The invention discloses a monodispersity polystyrene nanosphere and the preparation method thereof. The nanosphere adopts a solid round ball with smooth surface and the diameter of 100 to 200 nm, the polydispersity index of the round ball is 0.01 to 0.04, and the nanospheres can be closely arranged into a hexagonal configuration in a self-assembly manner. The method comprises the steps as follows: mixing styrene monomer, polystyrene microspheres, hexadecyl alcohol and Octyl phenol polyoxyethylene (10) ether according to the weight ratio of 98 to 102 : 0.98 to 1.2 : 1.98 to 2.2 : 1.98 to 2.2 and stirring for 20 min, and adding water to the mixture and continuing stirring for 30 min to obtain mixed solution, wherein the diameter of each polystyrene microsphere is 3 to 7 mm, and the weight ratio of water and the styrene monomer is 9.8 to 10.8 : 1; then placing the mixed solution in ultrasonic wave for at least 5 min to obtain miniemulsion; and after pumping nitrogen into the miniemulsionfor at least 10 min, adding potassium persulfate to the miniemulsion to perform polyreaction for 4 hours so as to manufacture the monodispersity polystyrene nanosphere. The invention can be widely applied to the fields of biomedicine, colloid science, chromatographic fractionation and the like.

Description

technical field [0001] The invention relates to a nanosphere and a preparation method thereof, in particular to a monodisperse polystyrene nanosphere and a preparation method thereof. Background technique [0002] Polymer microspheres with monodisperse particle size distribution have a wide range of applications in the fields of biomedicine, colloid science, and chromatographic separation. They are not only used in electron microscopy measurement, biochemical analysis, blood cell counting, etc., but also as immobilized carriers for proteins, antibodies, enzymes and drugs, and are also used in clinical testing and diagnosis. Styrene monomer is regarded as a model monomer due to its strong rigidity and high glass transition temperature. Monodisperse polystyrene microspheres have important application value as templates or modules in the construction of photonic crystals, inorganic / organic nanocomposites, and micro / nano hollow spheres. For this reason, people have made some a...

Claims

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Application Information

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IPC IPC(8): B01J13/14C08F2/22C08F12/08
Inventor 王化王若溪王磊田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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