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Preparation method for flexible soft monomer colloid photonic crystal emulsion

A technology of colloidal photonic crystals and soft monomers, applied in the field of preparation of flexible soft monomer colloidal photonic crystal emulsions, can solve the problems of insufficient elasticity and toughness of materials, high glass transition temperature of homopolymers, etc., and achieve convenient operation, simple equipment, Superior effect of monodispersity

Active Publication Date: 2017-10-10
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, researchers have found that traditional colloidal photonic crystals, such as polystyrene (PS), polymethyl methacrylate (PMMA), etc., due to the high glass transition temperature of the homopolymer of these monomers, the material elasticity and The toughness is not enough, and the craft products produced often cannot fully meet the actual needs

Method used

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  • Preparation method for flexible soft monomer colloid photonic crystal emulsion
  • Preparation method for flexible soft monomer colloid photonic crystal emulsion
  • Preparation method for flexible soft monomer colloid photonic crystal emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 0.01g of cross-linking agent N,N-methylenebisacrylamide and 90g of deionized water into a 250mL four-necked bottle, then add 2.0g of tertiary acrylic acid after washing and refining with 10% potassium hydroxide aqueous solution Butyl ester monomer and pass through stable nitrogen. Stir mechanically at 25°C at a speed of 180rmp for 25min, then heat up to 80°C, and then dropwise add 0.036g of initiator potassium persulfate dissolved in 10mL of water to initiate polymerization. After the reaction is finished, cool to room temperature, and then filter with a 200-mesh gauze to remove a small amount of gel to obtain a monodisperse poly(tert-butyl acrylate) colloidal emulsion. according to figure 1 The particle size distribution diagram shows that poly tert-butyl acrylate colloid particle size is about 103nm, and the monodispersity index of the emulsion is only 3.3%.

Embodiment 2

[0029] Weigh 0.008g of cross-linking agent methylol acrylamide and 90mL of deionized water into a 250mL four-necked bottle with a balance, then add 3.52g of tert-butyl acrylate monomer after washing and refining with 5% aqueous sodium hydroxide solution and Introduce stable argon gas, mechanically stir at 25°C at a speed of 200rmp for 30min, then heat up to 98°C, then dropwise add initiator dissolved in 10mL of water per 0.04g of ammonium persulfate to initiate polymerization. After the reaction is finished, cool to room temperature, and then filter with a 200-mesh gauze to remove a small amount of gel to obtain a monodisperse poly(tert-butyl acrylate) colloidal emulsion. figure 2 It is the SEM image of tert-butyl polyacrylate, the particle size is about 191nm, and the closely arranged structure of colloidal microspheres of tert-butyl acrylate shows that it has excellent monodispersity performance. The colloidal emulsion of tert-butyl acrylate is centrifuged and concentrated ...

Embodiment 3

[0031] Weigh 0.006g of cross-linking agent methylol acrylamide and 90mL of deionized water into a 250mL four-necked bottle with a balance, then add 4.16g of tert-butyl acrylate monomer after washing and refining with 5% aqueous sodium hydroxide solution and Introduce stable argon gas, mechanically stir at 25°C at a speed of 200rmp for 40min, then heat up to 85°C, then dropwise add initiator dissolved in 10mL of water per 0.04g of ammonium persulfate to initiate polymerization. After the reaction is finished, cool to room temperature, and then filter with a 200-mesh gauze to remove a small amount of gel to obtain a monodisperse poly(tert-butyl acrylate) colloidal emulsion. image 3 It is the AFM diagram of poly-tert-butyl acrylate, the particle size is about 244nm, and the structure of closely packed colloidal particles of poly-tert-butyl acrylate shows that it has excellent monodispersity performance. The colloidal emulsion of poly-tert-butyl acrylate is centrifuged and concent...

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Abstract

The invention relates to a preparation method for flexible soft monomer colloid photonic crystal emulsion. The method comprises the following steps: washing a tert-butyl acrylate monomer and performing reduced pressure distillation, thereby obtaining refined tert-butyl acrylate; adding a cross-linking agent and deionized water into a reactor and stirring till obtaining a homogeneous system; adding the refined tert-butyl acrylate into the reactor containing the homogeneous system, placing under the inert atmosphere shielding and uniformly stirring; heating the reaction device and then dropwise adding an initiator for initiating polymerization reaction; and filtering the obtained product, thereby obtaining the flexible soft monomer colloid photonic crystal emulsion. The preparation method is simple in equipment and convenient in operation, the product surface is clean and requires no complex post-treating process, and the prepared colloid particle has the characteristics of adjustable particle size and excellent monodisperse property.

Description

technical field [0001] The invention relates to a preparation method of a flexible soft monomer colloidal photonic crystal emulsion. Background technique [0002] Polymer colloidal photonic crystals are materials that spontaneously assemble monodisperse colloidal particles to form long-range order and close-packed structures under certain conditions. Because of their special size and dispersed structure, they have become an important research direction in the field of polymers. It has broad application prospects in production. Such as nanoscience, condensed matter physics, biochemistry, molecular biology, etc. have important applications. Recently, researchers have found that traditional colloidal photonic crystals, such as polystyrene (PS), polymethyl methacrylate (PMMA), etc., due to the high glass transition temperature of the homopolymer of these monomers, the material elasticity and The toughness is insufficient, and the craft products produced often cannot fully meet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F222/38C08F220/58
CPCC08F220/18C08F222/385C08F220/58
Inventor 陈苏洪日谭鹏峰王彩凤
Owner NANJING UNIV OF TECH
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