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A kind of intumescent composite flame retardant film and preparation method thereof

A composite flame retardant and intumescent technology, applied in the field of flame retardant films, can solve the problems of uneven dispersion of nano-silica and ammonium polyphosphate, poor interfacial compatibility, and decreased flame retardant efficiency, and achieve good strength and toughness, The effect of reducing bleed and improving flame retardant efficiency

Inactive Publication Date: 2017-10-27
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it cannot solve the problem of uneven dispersion of nano-silica and ammonium polyphosphate, poor interfacial compatibility with matrix materials, resulting in a decrease in flame retardant efficiency

Method used

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  • A kind of intumescent composite flame retardant film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Take nanocrystalline cellulose and distilled water by mass ratio of 3: 100, and homogenize at 300 bar high pressure 8 times to obtain evenly dispersed nanocrystalline cellulose colloid;

[0017] (2) Weighing the nanocrystalline cellulose colloid in step (1) and adding it to a polytetrafluoroethylene tank, drying at 50-60°C for 0.5h to form a layer of nanocrystalline cellulose film;

[0018] (3) Take ammonium polyphosphate, NaCl, distilled water by mass ratio 13:3:100, fully stir, obtain ammonium polyphosphate electrolyte, join on the nanocrystalline cellulose film of step (2), at 50~60 ℃ Dry for 3 hours, repeat the operation 4 times to obtain a nanocrystalline cellulose-ammonium polyphosphate film, and make the mass ratio of nanocrystalline cellulose in the formed film: ammonium polyphosphate to be 3:0.5;

[0019] (4) Weigh tetraethyl orthosilicate, ethanol, HCl and distilled water according to the mass ratio of 60:20:0.25:100, and mix ethyl orthosilicate, ethanol, ...

Embodiment 2

[0024] (1) Take nanocrystalline cellulose and distilled water by mass ratio of 4: 100, and homogenize under high pressure at 400 bar for 6 times to obtain evenly dispersed nanocrystalline cellulose colloid;

[0025] (2) Weighing the nanocrystalline cellulose colloid in step (1) and adding it to a polytetrafluoroethylene tank, drying at 50-60° C. for 1 hour to form a layer of nanocrystalline cellulose film;

[0026] (3) Take ammonium polyphosphate, NaCl, distilled water by mass ratio 10:3:100, fully stir, obtain ammonium polyphosphate electrolyte, join on the nanocrystalline cellulose film of step (2), at 50~60 ℃ Drying for 3 hours, repeating the operation 6 times to obtain a nanocrystalline cellulose-ammonium polyphosphate film, and making the mass ratio of nanocrystalline cellulose in the formed film: ammonium polyphosphate to be 4:1;

[0027] (4) Weigh tetraethyl orthosilicate, ethanol, HCl and distilled water according to the mass ratio of 70:20:0.25:100, and mix ethyl orth...

Embodiment 3

[0032] (1) Take nanocrystalline cellulose and distilled water by mass ratio 5: 100, homogenize at 500 bar high pressure 8 times, obtain evenly dispersed nanocrystalline cellulose colloid;

[0033] (2) Weighing the nanocrystalline cellulose colloid in step (1) and adding it to a polytetrafluoroethylene tank, drying at 50-60° C. for 1 hour to form a layer of nanocrystalline cellulose film;

[0034] (3) Take ammonium polyphosphate, NaCl, distilled water by mass ratio 15:3:100, fully stir, obtain ammonium polyphosphate electrolyte, join on the nanocrystalline cellulose film of step (2), at 50~60 ℃ Drying for 5h, repeating the operation 3 times to obtain a nanocrystalline cellulose-ammonium polyphosphate film, and making the mass ratio of nanocrystalline cellulose in the formed film: ammonium polyphosphate to be 5:2;

[0035] (4) Weigh tetraethyl orthosilicate, ethanol, HCl and distilled water according to the mass ratio of 80:20:0.25:100, and place orthosilicate ethyl, ethanol, HC...

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Abstract

The invention discloses an expansive composite flame-retardant membrane, and belongs to the field of flame-retardant membrane synthesis. The flame-retardant membrane is prepared from, by mass, 3-5 parts of nanocrystalline cellulose, 0.5-2 parts of ammonium polyphosphate and 1-2 parts of nano-silicon dioxide. The invention further discloses a preparation method of the expansive composite flame-retardant membrane. The expansive composite flame-retardant membrane is obtained by adopting layer-by-layer self-assembly. Through testing, the oxygen index of the expansive composite flame-retardant membrane is 32.4%-37.5%, and when the expansive composite flame-retardant membrane is applied to surface attaching treatment of a wood-plastic composite material, the average heat release speed of the wood-plastic composite material is 70.2-90.3 kW / m<2>. The obtained expansive composite flame-retardant membrane has the good flame retardance and is high in attaching force to the composite material. The flame-retardant membrane synthesis process is simple and environmentally friendly, and the expansive compositie flame-retardant membrane can be used for industrialized batch production.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant films, and in particular relates to an intumescent composite flame-retardant film based on layer-by-layer self-assembly technology and a preparation method thereof. Background technique [0002] The layer-by-layer self-assembly method is a technology based on the physical adsorption of oppositely charged polyelectrolytes, which is alternately deposited on a solid surface to form a multilayer film. In recent years, this method has been used to successfully construct intumescent flame-retardant membranes integrating carbon sources, acid sources and gas sources by compounding suitable cationic polyelectrolytes and phosphorus-containing anionic polyelectrolytes. However, the effect of intumescent flame retardant film is often based on the high quality content, further improving the flame retardant efficiency and reducing the quality content is the goal to pursue. [0003] Nanocrystalline cell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/04B32B23/00
CPCB32B9/00B32B9/04B32B23/00
Inventor 潘明珠蔡欣梅长彤曹晓倩余乐
Owner NANJING FORESTRY UNIV
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