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Composite body having coating layer of ceramic crystal, and method for producing same

A manufacturing method and composite technology, applied in the direction of ceramic layered products, chemical instruments and methods, phosphorus compounds, etc., can solve the problem of describing the thickness of the uncoated layer, etc.

Active Publication Date: 2019-09-17
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in Patent Document 1, it is only described that there are needle-shaped or plate-shaped calcium phosphate compounds at the interface between the calcium phosphate compound layer and the organic polymer substrate, and no calculation is made on the thickness of the coating layer. describe

Method used

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  • Composite body having coating layer of ceramic crystal, and method for producing same
  • Composite body having coating layer of ceramic crystal, and method for producing same
  • Composite body having coating layer of ceramic crystal, and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 0.005 g of gelatin (manufactured by Nippi, HMG-BP) was dispersed in 65 mL of distilled water. 10 mL of 0.018 mol / L calcium acetate aqueous solution was added to this dispersion liquid, it stirred at 300 rpm for 5 minutes using a magnetic stirrer, and 25 mL of 0.003 mol / L diammonium hydrogen phosphate aqueous solution was further added and stirred. Thereafter, the mixture was stirred at 300 rpm for 24 hours using a magnetic stirrer to obtain an aqueous dispersion of a complex in which calcium phosphate crystals were coated on the surface of gelatin. The dispersion was subjected to solid-liquid separation by centrifugation, and then freeze-dried to obtain core-shell particles.

[0033] figure 1 A transmission electron micrograph of the core-shell particles is shown. From this photograph, it was confirmed that the core, that is, the surface of the gelatin fiber was uniformly covered with a shell of ceramic crystals with a thickness of about 5 nm. figure 2 It is a transmi...

Embodiment 2

[0035] Add 50 mg of bovine serum albumin (manufactured by Sigma, Bovine Serum Albumin, BSA) to 100 mL of 0.010 mol / L calcium acetate aqueous solution, stir at 300 rpm for 5 minutes using a magnetic stirrer, and further dropwise add 100 mL of 0.006 mol / L hydrogen phosphate diammonium solution and stirred. Thereafter, the mixture was stirred at 300 rpm for 3 hours using a magnetic stirrer to obtain an aqueous dispersion of a complex in which calcium phosphate crystals were coated on the surface of BSA. After filtering the dispersion, freeze-drying was performed to obtain core-shell particles.

[0036] image 3 A transmission electron micrograph of the core-shell particles is shown. From this photograph, it was confirmed that a shell of ceramic crystals with a thickness of about 5 nm was uniformly coated on the surface of BSA as the core. In addition, from a lattice image obtained by a transmission electron microscope, it was found that hydroxyapatite was laminated in the c-ax...

Embodiment 3

[0038] 0.05 g of pectin (manufactured by Wako Pure Chemical Industries, 164-00552) was dispersed in 160 mL of distilled water. 20 mL of 0.080 mol / L calcium acetate aqueous solution was added to this dispersion liquid, and it stirred at 300 rpm for 5 minutes using the magnetic stirrer. Furthermore, 25 mL of 0.048 mol / L diammonium hydrogen phosphate aqueous solution was added and stirred. Thereafter, the mixture was stirred at 300 rpm for 24 hours using a magnetic stirrer to obtain an aqueous dispersion of core-shell particles in which hydroxyapatite crystals were formed on the surface of the pectin. The aqueous dispersion was subjected to solid-liquid separation by centrifugation, and then the solid matter was freeze-dried to obtain core-shell particles having a width of about 20 nm and a length of about 500 nm.

[0039] Figure 4 A transmission electron micrograph of the core-shell particles is shown. From this photograph, it was confirmed that a shell of ceramic crystals w...

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Abstract

Provided is a composite body in which ceramic crystals are thinly and uniformly coated onto a base material containing a hydrophilic polymer. The composite body includes: the base material which includes a hydrophilic polymer; and a ceramic layer coating at least a part of the surface of the base layer. The ceramic layer contains crystals having a laminated structure. The ceramic layer may contain calcium phosphate. The thickness of the ceramic layer is 0.3-50 nm. The composite body is produced through a step for mixing and then stirring the following: a dispersion in which the base material is dispersed; a first solution containing calcium ions; and a second solution containing phosphate ions.

Description

technical field [0001] The present invention relates to a composite having a base material comprising a hydrophilic polymer, a ceramic crystal covering the base material, and a method for producing the same. Background technique [0002] By covering the substrate with a ceramic layer to make a composite, it is possible to impart chemical resistance, chemical resistance, oxidation resistance, wear resistance, corrosion resistance, etc. to the substrate, or to achieve high fracture strength and high toughness of the substrate. Enhancement, toughness, high hardness, high elasticity, inclined functionalization, etc. If the ceramic layer is thin, the composite can achieve both lightness and strength. In addition, if the ceramic layer is made of calcium phosphate ceramics, the composite can be applied to biocompatible materials such as materials for adsorption and separation of proteins, filters for trapping viruses, biosensors, artificial bones, and artificial tooth roots. Raw ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04B32B9/02C01B25/32C08J3/12B32B18/00B32B23/04C08J7/046C08J7/056
CPCB32B18/00C01B25/32C08J3/128A61L27/32A61L2430/02A61L2430/12A61L27/20A61L27/227A61L27/222C08J7/046C08J7/056C08L5/06C08L5/08C08L1/26C08L89/00C08J3/205C08J7/06C08J2301/28C08J2305/06C08J2305/08C08J2389/00
Inventor 永田夫久江宫岛达也加藤且也
Owner NAT INST OF ADVANCED IND SCI & TECH
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