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Material, article and method of preparing materials containing oriented anisotropic particles

An anisotropic and particle technology, applied in the field of material and product preparation, can solve the problems of inability to achieve easy and efficient production, difficult continuous mode, slow and troublesome, etc., and achieve the effect of simple and economical preparation method.

Inactive Publication Date: 2004-03-17
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of preparing anisotropic particles oriented perpendicular to the plane of the film is slow and cumbersome, cannot be easily performed in a continuous manner, and cannot be easily and efficiently produced, see "Magnetically Oriented Oriented Conductive, Optically Transparent Composite Materials" S. Jin, T.H. Tiefel, R. Wolfe, IEEE Trans. Magn., 28(5, Pt.2), 2211-13(1992), Kokai Tokyo Koho JP 2002056719A2 20020222, Japan, Kokai Tokkyo Koho JP 2001322139 A2 20011120, Narration in Japan, Kokai Tokkyo Koho JP 2001294676 A2 20011023 and Kokai Tokkyo Koho JP2001335602 A2 20011204

Method used

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  • Material, article and method of preparing materials containing oriented anisotropic particles
  • Material, article and method of preparing materials containing oriented anisotropic particles
  • Material, article and method of preparing materials containing oriented anisotropic particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0116] Example 4 - Clay Particles in Conductive Polymer:

[0117] A nanocomposite similar to Example 1 was prepared using Cloisite Na and the conductive polymer Baytron P (poly(3,4-ethylenedioxythiophene styrenesulfonate), supplied by Bayer Corporation). The weight ratio of clay:Baytron P in the final composition was maintained at 75:25. It should be noted that Baytron P is a known intercalation clay, as described in US 6,025,119.

[0118] X-ray diffraction patterns of clay-polymer nanocomposites were recorded from two different sample orientations. Figure 5a In , data were collected for a surface that grew parallel to the substrate hit by the incident X-ray beam, Figure 5b In , data were collected for surfaces that grew in a direction perpendicular to the substrate hit by the incident X-ray beam. according to Figure 5a control Figure 5b The observed relative differences in the peak height intensities of the diffraction peaks clearly show an anisotropic arrangement of...

Embodiment 5

[0122] Example 5 - AgBr particles in gelatin:

[0123] Aqueous dispersion-type nanocomposites were prepared with flat sheets of AgBr and gelatin supplied by Eastman Kodak Company. The silver content was 1.55 mol Ag / kg emulsion and the gelatin polymer content was 40 g gelatin / mol Ag. The AgBr:gelatin nanocomposites were lyophilized in a Virtis Freezemobile 25ES with a Unitop 600L unit.

[0124] The X-ray diffraction patterns of AgBr:polymer nanocomposites were recorded from two different sample orientations. Figure 6a In , data were collected for a surface that grew parallel to the substrate hit by the incident X-ray beam, Figure 6b In , data were collected for surfaces that grew in a direction perpendicular to the substrate hit by the incident X-ray beam. according to Figure 6a control Figure 6b The relative differences in the peak height intensities of the observed diffraction peaks clearly indicate that the tabular AgBr particles exhibit anisotropic alignment. The ...

Embodiment 6

[0128] Example 6 - Cloisite Na clay particles dispersed in water:

[0129] Cloisite Na (a commercial grade montmorillonite clay supplied by Southern Clay Products) was formulated as an aqueous dispersion at 2 wt% solids. The final composition was stirred for at least 12 hours and then lyophilized in a Virtis Freezemobile 25ES with a Unitop 600L unit.

[0130] X-ray diffraction patterns of freeze-dried clay were recorded from two different sample orientations. Figure 7a In , data were collected for a surface that grew parallel to the substrate hit by the incident X-ray beam, Figure 7b In , data were collected for surfaces that grew in a direction perpendicular to the substrate hit by the incident X-ray beam. according to Figure 7a control Figure 7b The observed relative differences in the peak height intensities of the diffraction peaks clearly show an anisotropic arrangement of the clay platelets. The observed variation of the relative intensity of the diffraction p...

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Abstract

The present invention relates to a method for preparing oriented anisotropic particles comprising the steps of providing at least one anisotropic particle, dispersing the one anisotropic particle(s) in a medium, and freeze drying the dispersion of anisotropic particle(s) and the medium. In another embodiment, the present invention relates to an oriented anisotropic material comprising at least one anisotropic particle dispersed in a medium and thereafter freeze dried. Another embodiment relates to an article comprising an oriented anisotropic material and at least one matrix, wherein the oriented anisotropic material comprises a freeze dried anisotropic material.

Description

technical field [0001] The present invention relates to oriented anisotropic particles, and methods of making materials and articles containing oriented anisotropic particles. technical background [0002] Films containing anisotropic particles in a matrix resin produced by common methods such as solvent casting or extrusion and biaxial orientation result in the anisotropic particles being preferentially oriented in a direction parallel to the plane of the film. For this reason, properties such as modulus and conductivity are generally higher in the plane of the film than perpendicular to the plane of the film. See "Composites based on micron-scale flake graphite particles: electrical conductivity, critical exponent, and anisotropy" A. Celzard, E. McRae, J.F Mareche, G. Furdin, M. Dufort, and C. Deleuze, J. Phys .Chem.Solids Vol 57, pp.715-718 (1996), "Crystal Structure of Nylon 6 / Inorganic Layered Silicate Composite Thin Film" K.Fujimoto, M.Yoshikawa, S.Katahira, K.Yasue, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00B28B1/00C01B33/44C04B33/04C08J5/18C08K3/00C09C1/42C09C3/00F26B5/06
CPCF26B5/06C08J5/18C08K3/0008C08K3/01Y10T428/25Y10T428/2913
Inventor D·J·马萨T·N·布兰顿D·马祖姆达
Owner EASTMAN KODAK CO
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