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A kind of preparation method of high solid content monodisperse pure acrylic colloidal emulsion

A high-solid content, colloidal emulsion technology, applied in instruments, optical components, optics, etc., can solve the problems of low utilization rate of equipment, high production and storage costs, etc., and achieve the effect of easy heat dissipation, uniform shape, and good monodispersity

Active Publication Date: 2021-08-24
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mass solid content of these polymer emulsions is generally between 10% and 30%, and more than half of them are dispersion media. The equipment utilization rate is low, the production and storage costs are high, and an additional concentration process is required to meet the photonic crystal assembly requirements.

Method used

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  • A kind of preparation method of high solid content monodisperse pure acrylic colloidal emulsion
  • A kind of preparation method of high solid content monodisperse pure acrylic colloidal emulsion
  • A kind of preparation method of high solid content monodisperse pure acrylic colloidal emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 10g of deionized water, 60g of methyl methacrylate, 4g of α-methacrylic acid, 7g of butyl acrylate, 0.5g of amphoteric emulsifier CO897, 0.2g of cationic emulsifier sodium lauryl sulfate, and 0.02g of protective colloid with a balance Stir and mix polyvinylpyrrolidone in a 200mL beaker as a pre-emulsion; use a balance to weigh 8g of deionized water, 16g of methyl methacrylate, 4g of α-methacrylic acid, 6g of butyl acrylate, and 0.4g of amphoteric emulsifier CO897 , 0.2g cationic emulsifier sodium lauryl sulfate, 0.02g protective colloid polyvinylpyrrolidone are stirred and mixed in a 100mL beaker as a seed solution for later use; take 0.48g initiator potassium persulfate with a balance and add 20g deionized water to prepare Initiator solution: 120g deionized water, 0.3g amphoteric emulsifier CO897, 0.05g cationic emulsifier sodium lauryl sulfate, 0.02g protective colloid polyvinylpyrrolidone, 0.04g initiator potassium persulfate were stirred and mixed with a balanc...

Embodiment 2

[0038]Weigh 10g of deionized water, 65g of methyl methacrylate, 4g of α-methacrylic acid, 8g of butyl acrylate, 0.55g of amphoteric emulsifier CO897, 0.2g of cationic emulsifier sodium lauryl sulfate, and 0.02g of protective colloid with a balance Stir and mix polyvinyl alcohol in a 200mL beaker as a pre-emulsion for later use; use a balance to weigh 8g of deionized water, 20g of methyl methacrylate, 4g of α-methacrylic acid, 8g of butyl acrylate, 0.5g of amphoteric emulsifier CO897, 0.2g cationic emulsifier sodium lauryl sulfate, 0.02g protective colloid polyvinyl alcohol are stirred and mixed in a 100mL beaker as a seed solution for later use; weigh 0.5g initiator ammonium persulfate with a balance and add 15g of deionized water to prepare initiation 120g deionized water, 0.32g amphoteric emulsifier CO897, 0.06g cationic emulsifier sodium lauryl sulfate, 0.02g protective colloid polyvinyl alcohol, 0.05g initiator ammonium persulfate were stirred and mixed uniformly with a bal...

Embodiment 3

[0040] Weigh 8g of deionized water, 70g of methyl methacrylate, 6g of α-methacrylic acid, 8g of butyl acrylate, 0.5g of amphoteric emulsifier CO897, 0.15g of cationic emulsifier sodium lauryl sulfate, and 0.02g of protective colloid with a balance Stir and mix polyethylene glycol in a 500mL beaker as a pre-emulsion; use a balance to weigh 6g of deionized water, 20g of methyl methacrylate, 4g of α-methacrylic acid, 7g of butyl acrylate, and 0.45g of amphoteric emulsifier CO897 , 0.15g cationic emulsifier sodium lauryl sulfate, 0.02g protective colloid polyethylene glycol are stirred and mixed in a 200mL beaker as a seed solution for later use; take 0.55g initiator potassium persulfate with a balance and add 15g deionized water to prepare Initiator solution; weigh 120g deionized water, 0.28g amphoteric emulsifier CO897, 0.04g cationic emulsifier sodium lauryl sulfate, 0.03g protective colloid polyethylene glycol, 0.04g initiator potassium persulfate and mix evenly After that, tr...

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Abstract

The present invention relates to a preparation method of monodisperse pure acrylic colloidal emulsion with high solid content, the specific steps are as follows: first prepare seed solution, pre-emulsion solution, initiator solution and reaction bottom liquid, then transfer the reaction bottom liquid to a reaction container, Adjust pH to alkaline. After heating up to the reaction temperature under stable mechanical stirring conditions, add the pre-configured seed solution and pre-emulsion successively and inject the initiator. After the addition is completed, continue to react for 4-6 hours, and keep constant temperature and constant stirring speed during the entire reaction process. . After the reaction is finished, cool and sieve to obtain a monodisperse pure acrylic colloidal emulsion with high solid content. The prepared high-solid content monodisperse pure acrylic colloidal emulsion has a mass solid content in the range of 40%-55%, good fluidity, uniform appearance, good monodispersity, and adjustable particle size, and can be used as a base for preparing photonic crystal materials. The construction unit is simple, the utilization rate is high, and the operation is convenient.

Description

technical field [0001] The invention relates to a preparation method of a high-solid-content pure acrylic emulsion, in particular to a preparation method of a high-solid-content monodisperse pure acrylic colloidal emulsion that can be used as a photonic crystal assembly unit. Background technique [0002] Colloidal photonic crystals are self-assembled into regular and orderly colloidal crystal structures by monodisperse polymer colloidal particles under certain conditions, thereby realizing the preparation of photonic crystals. As the basic building block of colloidal photonic crystals, monodisperse polymer colloidal emulsions have become an important research direction in the field of polymers because of their special particle size and dispersion conditions. At present, the colloidal emulsions that can be used as photonic crystal assembly units include styrene-acrylic emulsion, PS emulsion, silicon-acrylic emulsion, silicon dioxide emulsion and pure acrylic emulsion. Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/06C08F220/18C08F2/26G02B1/00
CPCC08F2/26C08F220/14G02B1/005
Inventor 陈苏于晓晴佟玉龙
Owner NANJING TECH UNIV
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