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Noble metal/polymer microsphere Janus particles and preparation method thereof

A polymer and precious metal technology, applied in the field of precious metal/polymer microsphere Janus particles and their preparation, can solve the problems of complex preparation process and the like

Active Publication Date: 2014-04-02
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this Janus particle is relatively complicated, and it is functionally modified by stirring

Method used

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  • Noble metal/polymer microsphere Janus particles and preparation method thereof
  • Noble metal/polymer microsphere Janus particles and preparation method thereof
  • Noble metal/polymer microsphere Janus particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of core-shell polymer microspheres

[0023] Dissolve 50 mg of isoalcohol diester maleate in 40 mL of deionized water, stir mechanically for 1 hour, add 2 g of styrene monomer, nitrogen, continue stirring for 1 hour, add 20 mg of potassium persulfate and raise the temperature to 65 ° C for 24 hours to obtain a nucleus- Shell-structured polymer microsphere emulsion.

[0024] (2) Preparation of noble metal / polymer microsphere Janus particles

[0025] Take 1mL of the polymer microsphere emulsion in step (1) and dilute it to 10mL with deionized water; add 0.2mL of chloroauric acid aqueous solution with a concentration of 10mmol / L drop by drop under stirring; add 0.2mL with a concentration of 20mmol / L after 1 hour Sodium borohydride aqueous solution, stirring at room temperature for 3 hours; adding 0.0102g of cetyltrimethylammonium bromide and 1.5mL of chloroauric acid aqueous solution with a concentration of 10mmol / L, stirring for one hour and then standing ...

Embodiment 2

[0028] (1) Preparation of core-shell polymer microspheres

[0029] With embodiment 1.

[0030] (2) Preparation of noble metal / polymer microsphere Janus particles

[0031] Take 1mL of the polymer microsphere emulsion in step (1) and dilute it to 10mL with deionized water; add 0.3mL of chloroauric acid aqueous solution with a concentration of 10mmol / L drop by drop under stirring; add 0.3mL of a concentration of 20mmol / L after 1 hour Sodium borohydride aqueous solution, stirring at room temperature for 3 hours; adding 0.0086g cetyltrimethylammonium bromide and 0.5mL concentration of 10mmol / L aqueous auric acid chloride solution, stirring for one hour and then standing for 4 hours to obtain precious metal / polymerization Microsphere Janus particles. Characterize the structure of the resulting Janus particles with a transmission electron microscope (TEM), as image 3 shown. Compared with Example 1, the size of the noble metal Janus particles prepared in this example is obviously...

Embodiment 3

[0033] (1) Preparation of core-shell polymer microspheres

[0034] With embodiment 1.

[0035] (2) Preparation of noble metal / polymer microsphere Janus particles

[0036]Take 1mL of the polymer microsphere emulsion in step (1) and dilute it to 10mL with deionized water; add 0.3mL of chloroauric acid aqueous solution with a concentration of 10mmol / L drop by drop under stirring; add 0.3mL of a concentration of 20mmol / L after 1 hour Sodium borohydride aqueous solution, stirring at room temperature for 3 hours; adding 0.0094g cetyltrimethylammonium bromide and 1.0mL concentration of 10mmol / L chloroauric acid aqueous solution, stirring for one hour and then standing for 4 hours to obtain precious metal / polymerization Microsphere Janus particles. Characterize the structure of the resulting Janus particles with a transmission electron microscope (TEM), as image 3 shown. Comparing Example 2, it can be seen that the structure of the Janus particles prepared in this example does no...

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Abstract

The invention relates to a noble metal / polymer microsphere Janus particles and a preparation method thereof and relates to a composite material having dual properties and a preparation method thereof. The composite material uses a polymer microsphere having a core-shell structure as a carrier, the surface of the polymer microsphere is loaded with noble metal, and the structure and the size of the Janus particles are controlled by controlling the activity and concentration of reactants. The Janus particles have good dispersibility and size stability. The preparation method is simple and feasible, has feasibility in large-scale production and moreover satisfies different requirements by modification and functional decoration on the shells of the polymer microspheres, so that the noble metal / polymer microsphere Janus particles have potential application prospect in the fields of emulsion stabilization, optics, biosensing, drug delivery and electronics.

Description

technical field [0001] The invention relates to a precious metal / polymer microsphere Janus particle and a preparation method thereof, specifically a composite material with dual properties and a preparation method thereof. Background technique [0002] Janus is a double-faced god with front and back faces in ancient Roman mythology. In 1991, Degennes first proposed this concept in his Nobel Prize-winning speech, which is a term used to indicate that particles have two different properties at the same time. Since then, the research on Janus particles has begun to flourish. In recent years, innovative Janus particle preparation methods have emerged, mainly including Pickering emulsion method, phase separation method, microfluidic method, self-assembly method, planar semi-shielding method, etc. The scope of Janus particles has also been further expanded, including spherical, cylindrical, disc-shaped, snowman-shaped, hamburger-shaped, dumbbell-shaped, half-raspberry-shaped asym...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08K3/08C08F283/06C08F212/08B22F9/24
Inventor 戴李宗陈凌南吴悦广曾碧榕叶华立陈国荣许一婷罗伟昂项佳懿
Owner XIAMEN UNIV
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