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Aerogel based composites

A composite material and aerogel technology, applied in the field of composite foam materials and composite materials, can solve problems such as application limitations of composite foam materials

Active Publication Date: 2009-01-14
CABOT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the application of syntactic foams is limited

Method used

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  • Aerogel based composites
  • Aerogel based composites
  • Aerogel based composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0180] Nanogel Airgel particles / PVA slurries were mixed with 10 micron size Nanogel Granules (150 g) were prepared by adding to 1.5 liters of a solution containing 150 g of PVA and 20.5 g of Barlox 12i (100% basis). After shaking and stirring, a slurry with a milky consistency was formed. The slurry was laboratory dried at 100 °C to obtain a layered structure with an upper blocky layer rich in PVA, , representing the bulk of the material, an intermediate powdery layer and a bottom layer rich in PVA. The upper block was floated in isopropanol. Thermogravimetric studies indicated that the sample contained 42 wt% Nanogel Granules (ie, PVA:Nanogel weight ratio is about 1.4:1). The blocks were mixed into the epoxy resin at 40 and 50 volume % loading (assuming the blocks had a density of 0.27 g / cc) resulting in composites which appeared to be non-porous. Epoxy resin containing 40% by volume blocks was floated in isopropanol. An epoxy resin comprising 50 volume v% blocks was ...

Embodiment 2

[0182] Nanogel Water-Based Epoxy Composites: Water-based epoxy emulsions / dispersions are used with aqueous curing agents. Epoxy emulsions / dispersions are stabilized with surfactants. The hydrophobic nature of the Nanogel particles prevents the ingress of solutions. Gently agitate the 1-pot mixture of water-based epoxy (WBE), aqueous curing agent, and Nanogel granules. Excess surfactant in WBE helps to wet the Nanogel particles and get compact nanogel-epoxy composites. Nanogel grades TLD302, TLD101, 08N, in sizes 3.0, 1.0, and 0.08mm, respectively, were used. The composite was dried overnight, followed by curing at 70°C for 12 hours and resulted in a lightweight composite with favorable thermal properties.

[0183] Typical composition used: (i) sample SF_08N: 16g EPI REZ 3515, 4g EPI KURE8535, 3g Nanogel 08N (ii) sample SF_101: 16g EPI REZ 3515, 4g EPI KURE 8535, 6g water, 4g Nanogel TLD101. EPI REZ and EPI KURE chemicals were obtained from Resolution Performance Products. ...

Embodiment 3

[0187] Nanogel particles coated with water-based epoxy resin: Unlike Example 2 above where the curing agent was mixed into the aqueous mixture, a surface-active curing agent was used to modify the surface of the Nanogel particles to obtain a thin coating of epoxy resin formed on the Nanogel particles.

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Abstract

Composites, such as syntactic foams, are described. The composite contains at least one polymer and at least one aerogel. The aerogel is coated with a coating substance to at least substantially prevent the intrusion of the polymer into the pores of the areogel. Methods of making the composite are also described, as well as uses of the composite.

Description

technical field [0001] The present invention relates to syntactic foams and composites, processes for their preparation and uses of the syntactic foams and composites. More specifically, the present invention relates to syntactic foams and composites comprising aerogels. Background technique [0002] Syntactic foams are generally considered to be prefabricated, fabricated "foam" or microsphere fills in a resin environment. Syntactic foams are composite materials whose resinous matrix embeds preformed particles such as glass or ceramic microspheres. Syntactic foam differs from other foams in that hollow or solid spheres of predetermined size and fill composition are used to control the density of the foam. [0003] Syntactic foams have been used where low-density (mass / unit volume) fill materials are required, such as subsea / surface equipment for deep-sea velocity metering, anti-submarine warfare, sandwich composites, the aerospace industry, and the automotive industry. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00C08K7/26
CPCC08K7/26C08J9/32C08J9/0066C08J2363/00C08K7/22C08K9/00C08L101/00
Inventor 詹姆塞尔·梅纳什乌尔里克·鲍尔埃尔玛·波思曼安德鲁·A·彼得森安娜·K·威尔金斯米哈伊·安东达瓦尔·多希威廉·达尔泽尔
Owner CABOT CORP
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