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Fluid colloid crystal and process for producing three-dimensional aligned particle mass thereof

A colloidal crystal, three-dimensional ordering technology, applied in optics, instruments, optical components, etc., can solve problems such as unsatisfactory properties, defects, lack of structural uniformity in ordered structures, etc.

Inactive Publication Date: 2006-09-13
SOKEN CHEM & ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0033] However, even if no cracks are observed on the surface of particle stacks (or three-dimensional ordered lattices) proposed so far by drying solid-liquid suspensions to align and align dispersoid particles, the ordered structure Also tends to include layers in which the particles are not sufficiently aligned in the longitudinal and transverse directions, or form an ordered structure in which the particles are aligned in different directions such that the ordered structure lacks structural uniformity
Therefore, its properties are still unsatisfactory due to the inhomogeneity and defective structure of the ordered structure

Method used

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  • Fluid colloid crystal and process for producing three-dimensional aligned particle mass thereof
  • Fluid colloid crystal and process for producing three-dimensional aligned particle mass thereof
  • Fluid colloid crystal and process for producing three-dimensional aligned particle mass thereof

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Embodiment 1

[0202] Impurities such as unreacted monomers and emulsifiers are removed from the suspension (S1), and then the suspension (S1) is subjected to dialysis treatment to reduce its conductivity from the initial 4000 μS / cm to 400 μS / cm. The dialyzed suspension was gradually concentrated to a volume concentration of 36%. At this time, the color of the solid-liquid colloidal dispersion (suspension) visually perceived in the vertical direction is a green spectral diffraction color.

Embodiment 2

[0204] The MMA of 80 parts by weight and the benzoyl peroxide of 1.0 parts by weight are added in the four-necked flask of 1 liter to form a solution, then the water of 200 parts by weight, the polyoxyethylene polycyclic phenyl ether sulfuric acid of 3.3 parts by weight are added thereto The ester salt emulsifier and 6.5 parts by weight of C.I Sclvent Black 27 black dye were mixed with vigorous stirring. Then 28.6 parts by weight of the suspension (S1) prepared in Reference Example 1 were added to the mixture. The resulting mixture was gently stirred at 50°C for 0.5 hours, and then reacted at 75°C for 1.5 hours to prepare a suspension of polymer particles (S2). In the resulting suspension (S2) black polymer particles were formed which, according to electron microscopy, were monodisperse spherical particles with a volume average diameter of 200 nm. The volume concentration of solids was 21%. Impurities such as unreacted monomers and emulsifiers were removed from the suspensio...

Embodiment 3

[0206] A suspension was prepared by the same method as in Example 2, except that the conductivity was reduced to 100 μS / cm by dialysis. The suspension was gradually concentrated to a volume concentration of 38%. At this time, the color of the solid-liquid colloidal dispersion (suspension) visually perceived in the vertical direction is a red spectral diffraction color.

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Abstract

A solid-liquid dispersion electrostatically charged at 2000 muS / cm or below in terms of electric conductivity, comprised of an aqueous or soluble-water-containing nonaqueous dispersion medium solution wherein dispersoid electrostatically-charged spherical colloid particles of organic or inorganic polymer having an average particle diameter (d) of not exceeding 30 mum are dispersed in a concentration of not exceeding 70 %. In particular, there is provided a fluid colloid crystal constituting a fluid three-dimensional aligned colloid particle mass, comprised of a particle array structure consisting of particles aligned in latticed form in the longitudinal and lateral directions wherein around the dispersoid, there is electric double layer thickness (Deltae) and wherein interparticulate distance (L) defined as the distance between particle core centers arranged opposite to each other along the center line satisfies the relationship: (d) < (L) <= (d) + 2(Deltae). Further, there is provided a process for producing a three-dimensional aligned particle mass consisting of a uniform particle array structure of dispersoid organic or inorganic monodisperse spherical microparticles, comprising drying the above fluid colloid crystal.

Description

technical field [0001] The present invention relates to fluid colloidal crystals comprising liquid-solid colloidal dispersions. More specifically, the present invention relates to novel flowable colloidal crystals comprising an ordered structure of a solid-liquid colloidal dispersion system, said ordered structure possessing fluidity, composed of colloidal-sized organic or inorganic polymer spheres Formed into microparticles, the crystals have properties inherent to various ordered structures, such as excellent characteristic reflection spectra under irradiation with visible, ultraviolet, and infrared light. [0002] The present invention also relates to a method for preparing a three-dimensional ordered lattice (three-dimension ordered lattice), which method comprises drying the above-mentioned colloidal crystals so that organic or inorganic spherical particles as dispersoids (dispersoid) are longitudinally, Regularly aligned horizontally. [0003] In addition, the present ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02B1/02
Inventor 吉田哲也奥田有香滝沢容一渡边顺次
Owner SOKEN CHEM & ENG CO LTD
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