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Preparation method of vinyl versatate modified monodisperse colloid emulsion

A technology of vinyl tertiary carbonate and colloidal emulsion, which is applied in the field of preparation of monodisperse colloidal emulsion, can solve the problems of many restrictive conditions, time-consuming and labor-consuming, etc., and achieve the effect of simple equipment, uniform shape and adjustable particle size

Inactive Publication Date: 2020-10-30
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, multi-step operations are required to complete, there are many restrictions, and it is time-consuming and labor-intensive

Method used

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  • Preparation method of vinyl versatate modified monodisperse colloid emulsion
  • Preparation method of vinyl versatate modified monodisperse colloid emulsion
  • Preparation method of vinyl versatate modified monodisperse colloid emulsion

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Weigh 100g of deionized water, 0.037g of potassium persulfate, and 0.011g of N,N-methylenebisacrylamide in a 200mL beaker and transfer them to a 250mL four-necked flask; maintain the mechanical stirring at 250rpm, Add dropwise a mixture of 10g styrene, 0.4g hydroxypropyl acrylate, and 4g vinyl tertiary carbonate; after heating up to a reaction temperature of 93°C, keep the speed and constant temperature for 20 minutes to produce a blue phase; continue to react at a constant temperature and speed for 8 hours; cool down after the reaction , Remove the gel by filtering with a 200-mesh gauze to obtain a monodisperse colloidal emulsion modified by vinyl tertiary carbonate. From the SEM image of Figure (1), it can be seen that the colloidal particles are uniform in shape and closely arranged in regular and orderly regular hexagons. The particle size distribution diagram in Figure (2) shows that the average particle size of the prepared monodisperse colloidal emulsion modified...

Embodiment 2

[0032] Weigh 100g of deionized water, 0.038g of potassium persulfate, and 0.015g of N,N-methylenebisacrylamide in a 200mL beaker and transfer them to a 250mL four-necked flask; Add a mixture of 12g styrene, 0.8g butyl acrylate, and 8g vinyl tert-carbonate; after heating up to a reaction temperature of 90°C, keep the speed and constant temperature for 30 minutes to produce a blue phase; continue to react at a constant temperature and speed for 9 hours; Gauze filtration with 200 meshes removes the gel, and the monodisperse colloidal emulsion modified by vinyl tertiary carbonate can be obtained. The particle size distribution diagram of Figure (3) shows that the average particle size of the prepared monodisperse colloidal emulsion modified by vinyl tertiary carbonate is 247nm, and the PDI value of the emulsion is 3.4%. It is determined by experiments that the solid content of the emulsion is 18%, and after volatilization and self-assembly, it presents as Image 6 The green struc...

Embodiment 3

[0034] Weigh 100g of deionized water, 0.04g of ammonium persulfate, and 0.01g of divinylbenzene in a 200mL beaker and transfer them to a 250mL four-necked flask; maintain the mechanical stirring at 230rpm, and add 8g of methacrylic acid dropwise A mixture of methyl ester, 0.6g isooctyl acrylate, and 5g vinyl tert-carbonate; after heating up to a reaction temperature of 85°C, keep the speed and constant temperature for 30 minutes to produce a blue phase; continue to react for 10 hours at a constant temperature and speed; The objective gauze is filtered to remove the gel, and the monodisperse colloidal emulsion modified by vinyl tertiary carbonate can be obtained. The particle size distribution diagram in Figure (4) shows that the average particle size of the prepared monodisperse colloidal emulsion modified by vinyl tertiary carbonate is 276nm, and the PDI value of the emulsion is 4.6%. It is determined by experiments that the solid content of the emulsion is 12%, and after vol...

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Abstract

The invention discloses a preparation method of vinyl versatate modified monodisperse colloid emulsion. The vinyl versatate modified monodisperse colloid emulsion is prepared by adopting styrene / methyl methacrylate, acrylate monomers and vinyl versatate as comonomers and adopting soap-free emulsion polymerization. The preparation method comprises the following specific steps of: firstly, preparinga reaction base solution, dropwise adding comonomers under a stable mechanical stirring condition, then raising the temperature to initiate polymerization to continuously react for 8-10 hours, and keeping a constant temperature and a constant stirring speed in the whole reaction process and carrying out nitrogen protection; and after the reaction is finished, cooling and sieving to remove a smallamount of gel to obtain the vinyl versatate modified monodisperse colloid emulsion. The mass solid content of the vinyl versatate modified monodisperse colloid emulsion is 10-20%, the monodispersityis good, the particle size is adjustable, and the vinyl versatate modified monodisperse colloid emulsion can be used as a construction unit for preparing a high-quality hydrophobic photonic crystal material through a one-step method, and is economical, convenient and high in assembly efficiency.

Description

technical field [0001] The invention relates to a preparation method of a monodisperse colloidal emulsion modified by tertiary carbonic acid vinyl ester, in particular to a preparation method of a tertiary carbonic acid vinyl ester modified monodisperse colloidal emulsion which can be used as a high-quality hydrophobic photonic crystal assembly unit. Background technique [0002] Photonic crystals have a unique photonic bandgap that can manipulate the propagation of light at specific wavelengths and thus produce bright structural colors, which have attracted widespread attention. Among them, the method of constructing photonic crystals by orderly self-assembly of monodisperse colloidal particles has been widely used in the development of various photonic crystal materials because of its general, controllable and low-cost characteristics. Hydrophobic photonic crystals can realize large-area crack-free structures and have self-cleaning properties at the same time. However, th...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/20C08F220/18C08F218/10C08F220/54C08F212/36
CPCC08F212/08C08F220/14C08F220/20C08F218/10C08F220/54C08F220/1804C08F212/36C08F220/1808
Inventor 陈苏于晓晴
Owner NANJING UNIV OF TECH