Laminated insulator of low-temperature thermal-insulative composite nanometer material

A composite nanomaterial, multi-layer thermal insulation technology, applied in the directions of lamination, lamination devices, layered products, etc., can solve the problem of low thermal conductivity of spacers, high normal effective thermal conductivity coefficient, and poor reflectivity of reflective screens. higher question

Inactive Publication Date: 2007-01-17
上海暄能工程材料有限公司
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the existing heat insulation layer can only prevent part of heat conduction, but cannot effectively prevent heat radiation, heat convection and heat radiation; On the basis of low efficiency, nano-materials formed by nano-aerogels under nor

Method used

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Embodiment Construction

[0006] The present invention is further described below:

[0007] Make holes on the polyamide plastic film, and then use the sol-gel method on the polyester or polyamide film that has been slit (holed) at a temperature of 20-25°C and a humidity of less than 50%. Zirconia or zirconia-alumina film is coated on both sides as a reflective screen. Using the sol-gel method, through solvent replacement and surface modification, silica airgel was prepared, and silica airgel was in situ compounded with calcium silicate to form a nanostructured silica that has no carcinogenic effect on the human body. Airgel-calcium silicate nanocomposite material, using this nanocomposite material as a spacer for multilayer insulation, pasting it with the previously prepared plastic film, arranged alternately, and becoming a multilayer insulation after being treated at 60°C body. Vacuum wrapping technology is adopted, that is, the multilayer insulation body is effectively wrapped and vacuumized to fo...

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Abstract

A multi-layer heat isolator used as the low-temp heat-insulating surface layer of LNG ship or tank is prepared through plating zirconium oxide or zirconium oxide-aluminum oxide film on both surfaces of polyester or polyamide film by sol-gel method to form a reflecting screen, preparing the composite SiO2 aerogel-calcium silicate nanoparticles by sol-gel method, solvent replacing and surface modifying to obtain an isolating substance, and alternatively in-situ sticking to obtain a (3-50)-layer heat isolator (reflecting screen-isolating substance-reflecting screen-isolating substance).

Description

technical field [0001] The multi-layer nano-composite heat insulation body of the present invention is applied to the outer surface of the liquid metal container and the outer surface heat insulation layer of the device with low temperature heat insulation requirements, and the focus is to be used in the low temperature insulation of liquid metal containers such as LNG ships and LNG storage tanks. hot. technical background [0002] At present, the heat insulation materials used for LNG ships and storage tanks are mainly polyurethane foam and foam glass, but the biggest disadvantage of polyurethane foam is poor flame retardancy, poor dimensional stability at low temperature, and easy deformation and cracking, which is useful for the application on LNG ships. It is dangerous, and the thermal conductivity of foam glass is relatively high, and it is expensive. NASAAmes in the United States has developed a relatively practical nanoporous thermal insulation material that is alumi...

Claims

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Application Information

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IPC IPC(8): B32B33/00B32B37/14B32B5/14
Inventor 汪培庆汪庆锋
Owner 上海暄能工程材料有限公司
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