Cone-shaped Janus particle, preparation method and application thereof

A particle and cone-shaped technology, applied in the field of cone-shaped Janus particles and their preparation, can solve the problems of lack of synthetic exploration, few structural studies, and single formation process of Janus properties.

Inactive Publication Date: 2016-07-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, there are three key issues in the preparation of Janus particles: 1) The normal distribution of shapes. Although Janus materials have a variety of shapes, they are mainly concentrated in spherical, rod, flake, and snowman shapes. , while the exploration of synthesis of other morphologies is lacking; 2) The formation process of the Janus properties of particles is single, and only one fixed method can be used for modification of a bulk str

Method used

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  • Cone-shaped Janus particle, preparation method and application thereof
  • Cone-shaped Janus particle, preparation method and application thereof
  • Cone-shaped Janus particle, preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0087] Wherein, the preparation method of described superhydrophobic surface material comprises the steps:

[0088] 1) Apply the conical Janus particles to the surface of the substrate, and solidify at a certain temperature, for a certain period of time, and in the presence of a curing agent;

[0089] 2) Remove uncured conical Janus particles with a poor solvent.

[0090] In the curing reaction step, the temperature is 20-80°C; the time is 2-12 hours; the curing agent is one or more of acid anhydride, imidazole, polyamine, polythiol, and polyphenol; The poor solvent is at least one selected from water, petroleum ether, ethanol and alkanes with 4-10 carbon atoms.

Embodiment 1

[0094] [Example 1] Preparation of tapered Janus nanoparticles grafted with acrylamide

[0095] In this example, sodium lauryl sulfate and sorbitan monooleate are used as emulsifiers, and a phase change product with a specification of 52-54°C (melting point of 52-54°C) purchased from Sinopharm Chemical Reagent Co., Ltd. is used. Paraffin was used as the oil phase material.

[0096] 0.35 g of sodium lauryl sulfate and 0.5 g of sorbitan monooleate were added to 85 g of water, and this solution was used as the water phase.

[0097]Mix 10g of phase-change paraffin wax with a specification of 52-54°C, 2g of styrene, 1g of divinylbenzene, and 0.06g of azobisisobutyronitrile as an initiator, raise the temperature to 60°C, and stir to make them evenly mixed as an oil phase .

[0098] The above-mentioned water phase and oil phase were mixed, heated to 60°C, and sheared and emulsified for 2 minutes at a speed of 12,000 rpm using a high-speed mixer to obtain an oil-in-water emulsion.

...

Embodiment 2

[0102] [Example 2] Preparation of conical Janus nanoparticles composited by ferroferric oxide

[0103] 1. Preparation of Conical Nanoparticles

[0104] Sorbitan monooleate and polyoxyethylene ether sorbitan monooleate were used as emulsifiers, and phase-change paraffin wax with a specification of 52-54°C purchased from Sinopharm Chemical Reagent Co., Ltd. was used as an oil phase material.

[0105] 1 g of sorbitan monooleate and 0.5 g of polyoxyethylene ether sorbitan monooleate were added to 85 g of water, and this solution was used as the water phase.

[0106] Mix 10 g of phase-change paraffin, 2 g of styrene, 1 g of divinylbenzene, and 0.06 g of azobisisobutyronitrile as an initiator, raise the temperature to 60° C., and stir to mix them uniformly to form an oil phase.

[0107] The above-mentioned water phase and oil phase were mixed, heated to 60°C, and sheared and emulsified for 2 minutes at a speed of 12,000 rpm using a high-speed mixer to obtain an oil-in-water emulsio...

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Abstract

The invention discloses a cone-shaped Janus particle and its preparation method and application. The underside material of the cone-shaped Janus particle is a hydrophobic polymer and is formed by polymerization of monoolefine monomer; and the side material of the particle is a hydrophilic material and is formed by sulfonation hydrophilic modification of a hydrophobic polymer or formed by hydrophobic polymer surface grafting with a hydrophilic polymer. The side face of the cone-shaped Janus particle can also undergo hydrophobic modification and the bottom surface undergoes amino-modification. The cone-shaped Janus particle can be used in particle emulsifiers, and also can be used in preparing a surface coating of a material, especially a hydrophobic surface coating.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a conical Janus particle and a preparation method and application thereof. Background technique [0002] Janus is a double-faced god in ancient Roman mythology. Since the famous French scientist deGennes first used the word Janus to describe particles with dual properties in his Nobel acceptance speech in 1991 (P.G.DeGennes,Rev.Mod.Phys.,1992,64,645 –648), this kind of Janus particles with dual properties on the surface has attracted great research interest. Janus nanoparticle material combines the unique surface effect and small size effect of nanomaterials, and has great application prospects in many aspects such as emulsifiers, catalysts, sensors, displays and nanomotors (B.P.Binks, P.D.I.Fletcher.Langmuir2001, 17, 4708 ~4710; N. Glaser, D.J. Adams, A. G. Krausch. Langmuir 2006, 22, 5227~5229; A. Walther, M. Hoffmann and A.H.E. Müller, Angew. Chem., Int. Ed., 2008, 47, 71...

Claims

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Application Information

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IPC IPC(8): C08F257/02C08F220/56C08F212/08C08F212/36C08F267/06C08F220/14C08F222/14C08F220/18C08F2/24C08F2/26C08F2/30C08F8/00C08F8/36C08K9/04C08K3/22C08K3/36C08J7/12
Inventor 杨振忠赵华梁福鑫
Owner INST OF CHEM CHINESE ACAD OF SCI
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