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Composite board of nano silicon dioxide and expanded vermiculite and manufacturing method thereof

A technology of nano-silica and expanded vermiculite, applied in chemical instruments and methods, manufacturing tools, mixing operation control, etc., can solve problems such as unsatisfactory fire resistance, unenvironmental protection and water resistance, etc.

Inactive Publication Date: 2012-01-25
佛山市冠富贸易有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to make full use of the fire resistance of expanded vermiculite and the excellent heat insulation of nano-silica, and at the same time give full play to the reactivity of nano-silica in the water glass system to prepare an all-inorganic and environmentally friendly high-performance nano Silica-vermiculite composite board to overcome the shortcomings of existing products with unsatisfactory fire resistance or environmental protection or poor water resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The 1.4-4mm natural vermiculite fragments are heated and puffed in the puffing furnace at 800°C, and the loose bulk density is 90kg / m3 after selection. 3 expanded vermiculite. The expanded and selected expanded vermiculite raw material is mixed with nano-silica, water glass, and organic silicon water repellent according to weight percentage, and the expanded and selected expanded vermiculite raw material is 69%, and the nano-dioxide 1% silicon, 29% water glass, 1% organic silicon water repellent; the modulus of the water glass is 2.8, and the concentration is 42%. The concentration of the organosilicon water repellent is 40%. Mix the above-mentioned raw materials evenly in a closed mixer, and then pour them into the mold through the feeding port. The size of the mold is 1000×2000×30mm 3 , The bottom surface of the mold is covered with phenolic resin plastic plate for easy demoulding. The product density is designed to be 500kg / m 3 , 30kg of dry material is required...

Embodiment 2

[0036] The 0.3-4mm natural vermiculite fragments are rapidly heated and puffed in the puffing furnace at 850°C, and after selection, the loose bulk density is 140kg / m 3 expanded vermiculite. The expanded and selected expanded vermiculite raw material is mixed with nano-silica, water glass, and organosilicon water repellent according to weight percentage, wherein 52% of the expanded and selected expanded vermiculite raw material is nano-dioxide Silicon 5.2%, water glass 42%, silicone water repellent 0.8%. The modulus of the water glass is 2.5, and the concentration is 38%. The concentration of the organosilicon water repellent is 40%. Mix the above-mentioned raw materials evenly in a closed mixer, and then pour them into the mold through the feeding port. The size of the mold is 1000×2000×20mm 3 , The bottom surface of the mold is covered with phenolic resin plastic plate for easy demoulding. The product density is designed to be 700kg / m 3 , 28kg of dry material is requir...

Embodiment 3

[0049] The 0.3~2mm natural vermiculite fragments are heated and puffed in the puffing furnace at 750°C, and the loose bulk density is 180kg / m3 after selection. 3 expanded vermiculite. The expanded and selected expanded vermiculite raw material is mixed with nano-silica, water glass, and organosilicon water repellent according to weight percentage, wherein 48% of the expanded and selected expanded vermiculite raw material is nano-dioxide Silicon 8.8%, water glass 42%, silicone water repellent 1.2%. The modulus of the water glass is 2.5, and the concentration is 36%. The concentration of the organosilicon water repellent is 40%. Mix the above-mentioned raw materials evenly in a closed mixer, and then pour them into the mold through the feeding port. The size of the mold is 1000×2000×1.5mm 3 , The bottom surface of the mold is covered with phenolic resin plastic plate for easy demoulding. The product density is designed to be 800kg / m 3 , 24kg of dry material is required, an...

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Abstract

The invention belongs to the field of insulating materials and fireproof materials and relates to a composite board of nano silicon dioxide and expanded vermiculite and a manufacturing method thereof. The invention is characterized in that natural vermiculite pieces of 0.3 to 8mm are heated and expanded at the temperature of 500 to 800 DEG C, are selected to obtain the expanded vermiculite with the loose packing density of 90 to 200kg / m<3>; and expanded vermiculite materials after being expanded and selected are mixed with nano silicon dioxide, water glass and organic silicon water repellent according to weight percentage. The mixed materials are mixed evenly in a sealed stirrer, prepresssed, then hot-pressed and molded in a hot press, and then are discharged and properly finished and finally the composite board of nano silicon dioxide and expanded vermiculite is obtained. The invention introduces nano silicon dioxide, and utilizes the high activity thereof to greatly improve degree of crosslinking of silicon-oxygen tetrahedral network, thus not only improving strength and toughness greatly, but also leading the product to have good water resistance, fire resistance and environmental protection.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials and fireproof materials, and in particular relates to a composite plate made of nano silicon dioxide and expanded vermiculite and a manufacturing method thereof. technical background [0002] Vermiculite is a layered silicate mineral rich in interlayer water. When heated rapidly at 500-900°C, the interlayer chemical bonds of vermiculite will be destroyed due to the huge pressure of water vapor, so that the interlayer distance is changed by several Expanding to several nanometers or even several micrometers, the volume of vermiculite in the vertical layer direction expands tens of times. The resulting product is called expanded vermiculite. Boards or other products made of expanded vermiculite as the main raw material plus binders and other materials have certain fireproof and heat insulation functions. [0003] The invention patent "A Lightweight Thermal Insulation Board (CN1088158A)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B14/06B28B7/38C04B28/26B28B3/02B28C1/16B32B13/12B32B27/42B32B37/15C04B20/06B28C7/04
CPCC04B2111/28C04B2111/27C04B2111/00017C04B2111/00612C04B28/26
Inventor 陈华倪文陈德平封金鹏李德忠
Owner 佛山市冠富贸易有限公司