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Multi-component hybrid VIP core material and preparation method thereof

A multi-component, core material technology, used in ceramic products, other household appliances, insulation improvement and other directions, can solve the problems of low thermal conductivity and long life, and achieve the effect of small aperture, short production process and smooth surface of the embryo.

Active Publication Date: 2020-08-21
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Up to now, VIPs used in construction in my country still cannot solve the problem of both low thermal conductivity and long life.

Method used

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  • Multi-component hybrid VIP core material and preparation method thereof
  • Multi-component hybrid VIP core material and preparation method thereof
  • Multi-component hybrid VIP core material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of fiber / powder loose mixture: 5 parts of glass chopped strands with an average diameter of 11 μm and an average length of 4.5 mm, 80 parts of which have a specific surface area of ​​200 m 2 / g of fumed SiO 2 And 15 parts of CTAB adsorption specific surface area is 115m 2 / kg, mixed with carbon black opacifier with a tinting strength of 122%, and mechanically stirred it for 2 minutes at a rotational speed of 300 r / min in a drum-shaped container to obtain a loose fiber / powder mixture;

[0035] (2) Put the fiber / powder loose mixture into a flat metal mold, and use a press to pressurize the fiber / powder loose mixture once at a pressing speed of 100mm / s. The pressing pressure is 0.1MPa, and the pressure is maintained. The time is 5min, the temperature of the pressing plate during pressurization is 90°C, the surface of the mixture is not open, and the plate-shaped multi-component hybrid VIP core material embryo is obtained;

[0036] (3) Finished product pre...

Embodiment 2

[0040] (1) Preparation of fiber / powder loose mixture: 5 parts of glass chopped strands with an average diameter of 13 μm and an average length of 6 mm, 60 parts of which have a specific surface area of ​​200 m 2 / g of fumed SiO 2 , 20 parts of precipitated SiO with a particle size of 5000~6000 mesh 2 And 15 parts of CTAB adsorption specific surface area is 115m 2 / kg, mixed with carbon black opacifier with a coloring strength of 122%, and mechanically stirred it for 2 min with a stirring paddle at a speed of 400 r / min in a cylindrical container to obtain a loose fiber / powder mixture;

[0041] (2) Put the fiber / powder loose mixture into a flat metal mold, and use a press to pressurize the fiber / powder loose mixture twice at a pressing speed of 100mm / s. The first pressurization pressure is 0.1MPa, the holding time is 5min, the second pressing pressure is 1.0MPa, the holding time is 2min, the temperature of the platen during pressurization is 90 °C, the surface of the mixture i...

Embodiment 3

[0045] (1) Preparation of fiber / powder loose mixture: 10 parts of chopped carbon fibers with an average diameter of 8 μm and an average length of 9 mm, 65 parts of which have a specific surface area of ​​200 m 2 / g of fumed SiO 2 , 10 parts particle size is 20~40 mesh, bulk density is 180kg / m 3 of expanded vermiculite, 5 parts with a particle size of 10~85μm and a bulk density of 350kg / m 3 Mix the hollow glass microspheres with 10 parts of SiC powder sunscreen agent with a purity of ≥95% and an average particle size of 30 μm, and mechanically stir them in a drum-shaped container at a speed of 500 r / min for 3 minutes to obtain fibers / powders loose mix;

[0046] (2) Preparation of multi-component hybrid VIP core material embryo: put the fiber / powder loose mixture into a flat metal mold, and use a press to press the fiber / powder loose mixture 3 times at a pressing speed of 150mm / s Stepwise pressurization, the first pressurization pressure is 0.1MPa, the holding time is 3min, t...

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Abstract

The invention discloses a multi-component hybrid VIP core material and a preparation method thereof, and belongs to the technical field of heat insulation materials. The multi-component hybrid VIP core material comprises 1-15 parts of chopped fibers, 20-85 parts of fused SiO2, 0-50 parts of precipitated SiO2, 0-30 parts of a siliceous heat insulation filler and 0-25 parts of an opacifier, and is prepared by preparing a fiber / powder loose mixture, preparing a multi-component hybrid VIP core material blank and preparing the finished product. The preparation method comprises the following steps:stirring materials at a high speed; heating at the temperature of 20-250 DEG C, and pressurizing at the pressure of 0.1-5 MPa to make Si-O bonds formed between the chopped fibers and SiO2 to increasethe breaking strength of the core material to 0.1 MPa or above; carrying out graded pressurization for 1-4 times; and performing pressure maintaining for 0.1-15 min to make all the materials tightly connected, reduce the pore diameter of the core material to 40-250 nm and reduce the expansion rate to 0.1-10%. The core material is very suitable for the field of vacuum heat insulation of buildings.

Description

technical field [0001] The invention relates to a multi-component hybrid VIP core material and a preparation method thereof, belonging to the technical field of thermal insulation materials. Background technique [0002] With the rapid development of the world economy, energy saving, green, low carbon and environmental protection have increasingly become the mainstream of today's society. However, my country's building energy consumption accounts for nearly 1 / 3 of the total social energy consumption, and the energy consumption per unit area is 2 to 5 times higher than that of developed countries with similar climatic conditions. Its huge building energy consumption has become a major problem that needs to be solved urgently in my country. Improving the thermal insulation performance of the building insulation layer is an internationally recognized effective way to achieve building energy efficiency. The thermal conductivity of traditional thermal insulation materials, such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/02C04B38/08C04B40/02E04B1/80C04B111/40
CPCC04B30/02E04B1/803C04B2201/32C04B2111/40C04B2201/20C04B2201/50C04B14/42C04B14/062C04B14/022C04B40/0259C04B38/08C04B14/06C04B14/386C04B14/204C04B14/22C04B14/324Y02A30/242Y02B80/10
Inventor 李承东马汝军吕云红
Owner JIANGNAN UNIV
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