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A kind of preparation method of nano titanium dioxide-liquid crystal-acrylate dispersion liquid

A technology of nano-titanium dioxide and acrylate, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem of uneven dispersion of dispersion liquid, achieve low cost, suitable for large-scale industrial production, and little pollution Effect

Active Publication Date: 2016-02-24
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a method for preparing a nano-titanium dioxide-liquid crystal-acrylate dispersion, the purpose of which is to prepare a uniformly dispersed nano-titanium dioxide-liquid crystal-acrylate dispersion through in-situ synthesis , so as to solve the current preparation method of off-site dispersed nano-titanium dioxide-liquid crystal-acrylate dispersion, the prepared dispersion is unevenly dispersed, and the technical problems of using a large amount of organic solvents

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  • A kind of preparation method of nano titanium dioxide-liquid crystal-acrylate dispersion liquid

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[0029] The preparation method of nano titanium dioxide-liquid crystal-acrylic acid ester dispersion provided by the invention comprises the following steps:

[0030] (1) Preparation of acrylate monomer-liquid crystal-deionized water acidic emulsion.

[0031] The acrylate monomer and the liquid crystal are uniformly mixed according to a mass ratio of 1:1 to 19:1 to prepare a liquid crystal-acrylate solution.

[0032] The acrylate monomer is an acrylate monomer with a single double bond, multiple double bonds and a star structure, and the mass ratio of the multiple double bond acrylate monomer to the single double bond acrylate monomer is no more than 1:3; The mass ratio of the star-shaped acrylate monomer to the single-double bond acrylate monomer is between 1:19 and 3:2. The single and double bond acrylate monomer is one or more of n-butyl methacrylate, 2-ethylhexyl acrylate, and n-hexyl acrylate; the multi-double bond acrylate monomer is ethylene glycol One or more of dimet...

Embodiment 1

[0047] A kind of preparation method of nano titanium dioxide-liquid crystal-acrylic acid ester dispersion liquid, comprises the following steps:

[0048] (1) Preparation of acrylate monomer-liquid crystal-deionized water acidic emulsion.

[0049] The acrylate monomer and the liquid crystal are uniformly mixed at a mass ratio of 19:1 to prepare a liquid crystal-acrylate solution.

[0050] The acrylate monomer comprises single and double bond acrylate monomer n-butyl methacrylate, star-shaped acrylate monomer pentaerythritol tetraacrylate, and the mass ratio of pentaerythritol tetraacrylate to n-butyl methacrylate is 1 :19.

[0051] The liquid crystal is 4-pentyl-4 cyanobiphenyl.

[0052] Add deionized water, the mass ratio of deionized water to liquid crystal-acrylate solution is 1:27, use hydrochloric acid to adjust the pH value to 1, add dodecylbenzenesulfonic acid, the mass ratio of the surfactant and acrylate monomer The ratio is 1:49, and the emulsion is formed after un...

Embodiment 2

[0060] A kind of preparation method of nano titanium dioxide-liquid crystal-acrylic acid ester dispersion liquid, comprises the following steps:

[0061] (1) Preparation of acrylate monomer-liquid crystal-deionized water acidic emulsion.

[0062] The acrylate monomer and the liquid crystal are uniformly mixed at a mass ratio of 3:1 to prepare a liquid crystal-acrylate solution.

[0063] The acrylate monomer is: acrylate monomer n-hexyl acrylate and 2-ethylhexyl acrylate with single and double bonds, ethylene glycol dimethacrylate monomer with multiple double bonds, star-shaped structure Acrylate monomers pentaerythritol tetraacrylate and pentaerythritol triacrylate, the mass ratio of the n-hexyl acrylate to 2-ethylhexyl acrylate is 1:1; the acrylate monomer with multiple double bonds and the acrylic acid with single and double bonds The mass ratio of ester monomer is 1:3; the mass ratio of pentaerythritol tetraacrylate and pentaerythritol triacrylate is 1:1; the mass ratio of...

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Abstract

The invention discloses a preparation method of a nanometer titania-liquid crystal-acrylate dispersion liquid. The method comprises the following steps: (1) evenly mixing an acrylate monomer with a liquid crystal, so as to prepare a liquid crystal-acrylate solution, adding deionized water to adjust the pH value between 1-2, then adding a surfactant to evenly mix, so as to form an emulsion; (2) adding a titanium dioxide precursor, generating nanometer titania particles by hydrolysis and condensation, and evenly dispersing in the mixed solution; (3) adding a silane coupling agent and carrying out silane coupling modification, so as to prepare the liquid crystal-acrylate mixed monomer dispersion liquid containing surface-modified nanometer titania; and (4) standing and layering the dispersion liquid, and taking an upper liquid. By adopting the preparation method of the nanometer titania-liquid crystal-acrylate dispersion liquid provided by the invention, the nanometer titania particles are evenly dispersed, and an optical composite material with high refractive index cutting degree can be prepared, and the method does not need post-treatment and is small in pollution.

Description

technical field [0001] The invention belongs to the field of optical composite materials, and more specifically relates to a preparation method of nano titanium dioxide particle-liquid crystal-acrylate dispersion liquid. Background technique [0002] Laser holographic polymer / liquid crystal composite materials have been widely used in anti-counterfeiting security, three-dimensional display, and holographic data storage due to their advantages of high diffraction efficiency, good dimensional stability, and fast electro-optical response (Angew.Chem.Int.Ed. , 2011, 50, 4552–4573). In this type of composite material, the composite system of monomer (acrylate is a common type of monomer) and liquid crystal undergoes photopolymerization under the coherent action of laser light to form a grating structure. The polymer is enriched in the bright area of ​​the coherent fringe (forming a polymer phase), and the liquid crystal is enriched in the dark area (forming a liquid crystal phas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/06C08K3/22C09K19/52C09K19/12C09K19/26C09K19/50C01G23/047C08L33/08
Inventor 解孝林刘凤珍廖永贵周兴平杨志方倪名立薛志刚
Owner HUAZHONG UNIV OF SCI & TECH