Inorganic sheet composite material with surface having double property and preparation thereof

A technology of composite materials and inorganic substances, applied in the field of materials, can solve the problems of easy submersion, difficulty in preparing microscopic particles with dual properties, and difficulty in ensuring that only part of the ball is covered.

Inactive Publication Date: 2008-12-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The earliest de Gennes and his colleagues immersed half of the glass beads in the varnish so that half of the beads were covered by the varnish, and the other half remained on the original surface, then after treatment with a silane coupling agent, the uncoated surface was modified. However, this method is difficult to prepare microscopic particles with dual properties at the nanoscale, because when the particles are too small, it is difficult to ensure that all the small balls are only partially covered, and the varnish layer will easily flood the entire small balls
It has been reported that charged microspheres are dispersed at the water-air interface or liquid-solid interface, or the microspheres are partially embedded in paraffin medium, and then modified; these methods are only of theoretical research value, due to the requirement Microscopic particles must be monodispersed on the surface of the medium, which limits mass production; in addition, various complex processing methods also bring great limitations

Method used

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  • Inorganic sheet composite material with surface having double property and preparation thereof
  • Inorganic sheet composite material with surface having double property and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Add 10 grams of polystyrene microspheres with a diameter of 300 nm into a 500 mL three-neck flask, add 100 mL of concentrated sulfuric acid, stir at 40 °C for 2 hours, wash fully with distilled water, then wash twice with ethanol, and dry in vacuum. Add the product to a 250mL three-neck flask, add 100mL of absolute ethanol and 2 grams of tetraethyl orthosilicate, soak at room temperature for 6 hours, centrifuge, then wash with ethanol once, add 50mL of ethanol and 5mL of distilled water, soak for 2 hours, filter ; into a 250mL three-necked bottle, add 100mL of absolute ethanol and 2 grams of butyl titanate, soak at room temperature for 6 hours, centrifuge, then wash with ethanol once, add 50mL of ethanol and 5mL of distilled water, soak for 2 hours, filter; In a 250mL three-necked bottle, add 100mL of absolute ethanol and 2 grams of tetraethyl orthosilicate, soak at room temperature for 6 hours, centrifuge, then wash with ethanol once, add 50mL of ethanol and 5mL of dist...

Embodiment 2

[0085] Add 4 grams of hollow glass microspheres (3010, Zibo Glass Microsphere Research Institute) into a 100 mL Erlenmeyer flask; add 50 mL of absolute ethanol and 1 gram of phenyltriethoxysilane; reflux for 10 After 1 hour, filter, wash thoroughly with absolute ethanol, filter, and dry. Then the product is crushed with a mortar or ball mill to obtain an inorganic sheet containing a phenyl hydrophobic group on one side and an inorganic hydrophilic group on the other side.

Embodiment 3

[0087] Take 2 grams of the inorganic tablet obtained in Example 2 and add it to a 100 mL Erlenmeyer flask; add 50 mL of anhydrous toluene and 1 mL of γ-aminopropyltriethoxysilane, react at 60° C. for 6 hours under nitrogen protection, and filter. Wash thoroughly with anhydrous toluene, filter and dry to obtain an inorganic sheet with a phenyl hydrophobic group on one side and an amino hydrophilic group on the other side.

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Abstract

The invention pertains to the material technology field, and more particularly relates to an inorganic flake composite with the surface having dual natures, and a preparation method thereof. The invention takes an inorganic hollow microsphere, a polymer composite ball with the surface integrated with an inorganic lamella, or polymer composite fiber with the surface integrated with an inorganic lamella as raw materials, the external surfaces of which are modified and crushed to obtain inorganic flake materials; and then exposed fresh surfaces are modified again to obtain the inorganic flake materials with both surfaces having different chemical properties. The inorganic flake composite of the invention with the surface having the dual natures is composed of an inorganic substrate and a single layer, double layers or multiple layers of compounded surface chemicals on the substrate, and both sides of the substrate have different surface chemicals. The method provided by the invention is simple, convenient and easy to be operated, and not only possesses the feasibility of large-scale production, but also can carry out multi-step modification to the surfaces of micro-granules so as to meet different needs.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an inorganic sheet composite material with dual properties on the surface and a preparation method thereof. technical background [0002] Since German de Gennes first used the word Janus to describe the different chemical properties of the surface of inorganic particles at the same time in 1991, the research on microscopic particles with dual properties on the surface has become a hot spot. The preparation of particles with simultaneously different chemical properties on the surface is important for molecular recognition and control of the self-assembly process. If one surface of the particle is hydrophilic and the other surface is lipophilic, the material can be used as an oil-water emulsifier, surfactant, foam stabilizer, wetting agent, etc. Responsive particles or chemical molecules can be used in printer ink, medicine and other fields. [0003] The earliest de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/00B82B1/00B82B3/00C09K23/00
CPCC08K7/24
Inventor 杨振忠刘继广屈小忠徐慧芳
Owner INST OF CHEM CHINESE ACAD OF SCI
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