Preparation method for functionalized monodisperse polystyrene hybrid colloid emulsion

A polystyrene and colloidal emulsion technology, applied in the field of emulsion preparation, can solve the problems of complexity, time-consuming, poor product monodispersity, etc., and achieves the effects of convenient operation, cheap and easy-to-obtain raw materials, and simple equipment.

Active Publication Date: 2013-09-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are relatively complicated and time-consuming, and the monodispersity of the prepared products is not very good, which limits the large-scale production and practical application of functional monodisperse composite polymer colloidal particles

Method used

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  • Preparation method for functionalized monodisperse polystyrene hybrid colloid emulsion
  • Preparation method for functionalized monodisperse polystyrene hybrid colloid emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 0.5g of stabilizer polyvinylpyrrolidone and 1.5g of pH regulator sodium bicarbonate with a balance, add 150mL of water to a 250mL four-necked bottle, then add 5g of styrene monomer and 1g of functional monomer hydroxyethyl acrylate, quickly The temperature was raised to 98°C, the initiator dissolved in 15mL of water was added dropwise and per 1g of potassium persulfate was added to initiate polymerization, and the stirring speed and temperature of 150rmp were kept constant, and the reaction system was carried out under stable conditions for 2h. Then, a mixed aqueous solution of 0.5 g of hydroxyethyl acrylate, 0.5 g of vinylimidazole, and 0.1 g of potassium persulfate was added, and the reaction was continued for 3 hours. Cool to room temperature, remove a small amount of gel by filtering with a 200-mesh gauze, and then obtain poly[styrene-co-hydroxyethyl acrylate] poly[hydroxyethyl acrylate-co-vinyl imidazole] hybrid colloidal particles. The emulsion has a monodi...

Embodiment 2

[0031] Take 0.5g of stabilizer polyvinylpyrrolidone and 1.5g of pH regulator sodium bicarbonate, add 150mL of water to a 250mL four-necked bottle, then add 5.5g of styrene monomer and 1g of functional monomer acrylic acid, and rapidly heat up to 99°C , drop the initiator dissolved in 18mL of water per 1g of potassium persulfate to initiate polymerization, keep a constant stirring speed and temperature of 150rmp, and keep the reaction system under stable conditions for 2h. Then, a mixed aqueous solution of 0.5 g of acrylic acid, 0.5 g of vinylimidazole, and 0.1 g of potassium persulfate was added, and the reaction was continued for 3 hours. Cool to room temperature, filter with a 200-mesh gauze to remove a small amount of gel, and then obtain poly[styrene-co-acrylic acid]poly[acrylic acid-co-vinylimidazole] hybrid colloidal particles with a monodisperse core-shell structure . The emulsion has a monodispersity index of less than 5% and has a particle size of 259 nm.

Embodiment 3

[0033] Take 0.5g of stabilizer polyvinylpyrrolidone and 1.5g of pH regulator sodium bicarbonate and add 150mL of water to a 250mL four-necked bottle, then add 6g of styrene monomer and 1g of functional monomer acrylic acid, and rapidly heat up to 100°C. The initiator dissolved in 20mL of water was added dropwise with 1g of potassium persulfate to initiate polymerization, and the stirring speed and temperature were kept constant at 150rmp, and the reaction system was carried out under stable conditions for 2h. Then, a mixed aqueous solution of 0.5 g of acrylic acid, 0.5 g of hydroxyethyl acrylate, and 0.1 g of potassium persulfate was added, and the reaction was continued for 3 hours. Cool to room temperature, filter with a 200-mesh gauze to remove a small amount of gel, and then obtain poly[styrene-co-hydroxyethyl acrylate] poly[hydroxyethyl acrylate-co-acrylic acid] with a monodisperse core-shell structure Hybrid colloidal particles. The emulsion has a monodispersity index o...

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Abstract

The invention discloses a preparation method for a functionalized monodisperse polystyrene hybrid colloid emulsion. Colloid particles prepared by the method have the characteristics of adjustable particle size and good monodispersity. The method comprises the steps of a, washing styrene with a sodium hydroxide solution, then washing with water to neutral, carrying out reduced pressure distillation, and collecting fractions for use; b, adding an emulsion stabilizing agent, a pH adjusting agent and water into a reactor and stirring to form a homogeneous system; c, adding styrene monomers obtained by the step a and polymer monomers with relatively high activity, heating to the temperature of 98-100 DEG C rapidly, putting the system under a protection state of nitrogen atmosphere to remove oxygen in the reactor; d, dropping an initiator aqueous solution to initiate polymerization, allowing the polymerization system to be carried out in a stable condition; e, adding a mixed aqueous solution of two polymer monomers with relatively high activity and the initiator after the polymerization is carried out for 2 hours, continuously reacting for over 3 hours; and f, filtering with a screen to remove a small amount of gel, and collecting filtrate.

Description

technical field [0001] The present invention relates to a kind of preparation method of emulsion, more specifically relate to a kind of preparation method of functionalized monodisperse polystyrene hybrid colloidal emulsion. Background technique [0002] Monodisperse polymer colloidal particles generally refer to polymer spheres with uniform shape and size. With their special size and dispersion characteristics, they have become an important direction of soft matter research and have broad application prospects in industrial production and daily life. Such as nanomaterial science, molecular biology, life science, condensed matter physics, biochemistry, etc. have important applications. Recently, researchers have found that typical colloidal particles, such as PS, PMMA, SiO 2 Such colloidal materials, because the simplification of surface functions often cannot meet the actual needs, it is extremely important to combine other functions such as light, electricity, and magneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08F220/28C08F226/06C08F212/08C08F220/06
Inventor 陈苏尹苏娜王彩凤
Owner NANJING UNIV OF TECH
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