Preparation method of nanometer bismuth hydroxide/polyethylene flame-retardant composite material

A technology of nano-bismuth hydroxide and flame-retardant composite materials, which is applied in the direction of plastic/resin/wax insulators, organic insulators, conductors, etc., can solve problems such as uneven growth, and achieve simple equipment, low cost, and increased carbon formation. Effect

Inactive Publication Date: 2014-05-14
HARBIN UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem of uneven growth of bismuth hydroxide on the surface of polyethylene by the water bath synthesis method, and to provide a preparation method of nano bismuth hydroxide / polyethylene flame-retardant composite material

Method used

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  • Preparation method of nanometer bismuth hydroxide/polyethylene flame-retardant composite material
  • Preparation method of nanometer bismuth hydroxide/polyethylene flame-retardant composite material
  • Preparation method of nanometer bismuth hydroxide/polyethylene flame-retardant composite material

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specific Embodiment approach 1

[0015] Specific embodiment one: In this embodiment, the preparation method of nano bismuth hydroxide / polyethylene flame retardant composite material is carried out according to the following steps:

[0016] 1. Dissolve bismuth hydroxide and polyethylene in alcohol and mix them to obtain a mixed solution. The mass ratio of polyethylene to bismuth hydroxide in the mixed solution is 3 to 40:1, and the concentration of bismuth hydroxide in the mixed solution is 1 to 40:1. 300g / L;

[0017] 2. Pour the mixed solution obtained in step 1 into a ball mill tank, the mass ratio of balls to materials is 15:1, and ball mill at a speed of 50-300r / min for 1-30 hours;

[0018] 3. Adjust the pH value of the mixed solution treated in step 2 to 7-14 with ammonia water, then pour it into the hydrothermal synthesis reaction kettle, and keep it warm at a filling ratio of 70-85% and a temperature of 100-140°C 1~24h;

[0019] 4. Pour out the powder from the hydrothermal synthesis reaction kettle, w...

specific Embodiment approach 2

[0021] , Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the mass ratio of polyethylene to bismuth hydroxide in the mixed solution described in step 1 is 90:10.74. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the mass ratio of polyethylene to bismuth hydroxide in the mixed solution described in step 1 is 85:16.12. Others are the same as those in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a nanometer bismuth hydroxide / polyethylene flame-retardant composite material, and relates to a flame-retardant composite material which contains an inorganic flame retardant and a preparation method of the flame-retardant composite material. The invention aims at solving the technical problem that the bismuth hydroxide is nonuniformly grown on the surface of polyethylene in a water bath synthetic method. The method comprises the following steps of dissolving the bismuth hydroxide and the polyethylene into alcohol, mixing, and then pouring into a ball milling jar for ball milling, wherein the mass ratio of mill balls to materials is 15:1; then regulating a pH value, pouring into a hydro-thermal synthesis reaction kettle for heat preservation; pouring powder from the hydro-thermal synthesis reaction kettle, washing the powder by using alcohol, drying, then placing the powder into a flat vulcanizing machine for hot press forming, and cooling to room temperature to obtain the nanometer bismuth hydroxide / polyethylene flame-retardant composite material. According to the invention, the generated bismuth hydroxide is coated on the surface of the polyethylene through a solvent thermal synthesis method, nanometer particles contained in the prepared nanometer particle / polyethylene composite material are uniformly dispersed, the bismuth hydroxide outstandingly enhances the flame-retardant property of the polyethylene, and the carbon forming amount of the polyethylene is greatly increased. The invention belongs to the field of preparation of flame-retardant composite materials.

Description

technical field [0001] The invention relates to a preparation method of a flame-retardant composite material containing an inorganic flame retardant. Background technique [0002] Polyethylene (PE) is a light and non-toxic polymer insulating material. It is widely used because of its excellent electrical insulation, low temperature resistance, sufficient mechanical properties, and excellent chemical stability and dielectric properties. It is widely used in the wire and cable industry. However, polyethylene (PE) has poor flame retardancy, and its oxygen index is only 17.4. It is a flammable material with a high calorific value of combustion. The molten droplets may also ignite other combustibles, aggravate the damage of the fire, and pose a huge threat to people's lives, thus limiting its development. However, as a wire and cable material, polyethylene should have flame retardant properties such as high flame resistance, low burning speed, and low smoke generation. It does ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K3/22H01B3/44H01B7/295
CPCB29C35/02C08K3/22C08K2201/011C08L2201/02C08L2203/20H01B3/441H01B7/295C08L23/06
Inventor 迟庆国王语柠林家齐刘刚王暄
Owner HARBIN UNIV OF SCI & TECH
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