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A kind of magnesium hydroxide/graphene flake composite flame retardant and preparation method thereof

A technology of graphene flakes and composite flame retardants, which is applied in the field of flame retardants and their preparation, can solve the problems of complex process, low thermal stability and flame retardant performance, difficulty in controlling magnesium hydroxide, etc., and achieve simple process, Improve compatibility and increase stability

Active Publication Date: 2021-05-07
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the complex process of the magnesium hydroxide / graphene flake composite flame retardant prepared by the existing method, low thermal stability and flame retardancy and difficulty in controlling the morphology, purity and particle size of magnesium hydroxide problem, and provide a kind of magnesium hydroxide / graphene flake composite flame retardant and preparation method thereof

Method used

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  • A kind of magnesium hydroxide/graphene flake composite flame retardant and preparation method thereof
  • A kind of magnesium hydroxide/graphene flake composite flame retardant and preparation method thereof

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specific Embodiment approach 1

[0030] Embodiment 1: This embodiment is a magnesium hydroxide / graphene flake composite flame retardant that is a magnesium hydroxide-coated graphene flake with a hexagonal flake structure, and the size of the magnesium hydroxide with the hexagonal flake structure is 100nm to 800nm.

specific Embodiment approach 2

[0031] Specific embodiment two: present embodiment is a kind of preparation method of magnesium hydroxide / graphene flake composite flame retardant and is finished according to the following steps:

[0032] 1. Preparation of graphene flake dispersion:

[0033] Mixing the graphene flakes, dispersant and deionized water, and then transferring to a grinding device for grinding to obtain a graphene flake dispersion;

[0034] The mass ratio of graphene flake described in step 1 and dispersant is 1:(0.5~10);

[0035] The mass ratio of graphene sheet described in step 1 and deionized water is (0.001~0.05):(1~20);

[0036] 2. Add light-burned magnesium powder to the grinding equipment equipped with graphene flake dispersion, and then grind to obtain magnesium hydroxide / graphene flake composite slurry;

[0037] The mass ratio of lightly burned magnesium powder and graphene flakes described in step 2 is 1:(0.001~0.01);

[0038] 3. Add modifier to the grinding equipment equipped with m...

specific Embodiment approach 3

[0041] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the mass ratio of graphene flakes and deionized water described in step one is (0.001~0.05):(8~10). Other steps are the same as in the second embodiment.

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Abstract

A magnesium hydroxide / graphene flake composite flame retardant and a preparation method thereof, which relate to a flame retardant and a preparation method thereof. The purpose of the present invention is to solve the complex process of the magnesium hydroxide / graphene flake composite flame retardant prepared by the existing method, low thermal stability and flame retardancy and difficulty in controlling the morphology, purity and particle size of magnesium hydroxide question. A magnesium hydroxide / graphene flake composite flame retardant is a magnesium hydroxide-coated graphene flake with a hexagonal sheet structure, and the size of the magnesium hydroxide with a hexagonal sheet structure is 100nm to 800nm. Method: 1. Preparation of graphene flake dispersion liquid; 2. Preparation of magnesium hydroxide / graphene flake composite slurry; 3. Preparation of modified composite slurry; 4. High temperature reaction to obtain magnesium hydroxide / graphene flake composite flame retardant agent. The invention can obtain a magnesium hydroxide / graphene flake composite flame retardant.

Description

technical field [0001] The invention relates to a flame retardant and a preparation method thereof. Background technique [0002] Magnesium hydroxide is a green, low-cost and environmentally friendly inorganic additive flame retardant, which has the characteristics of high efficiency, non-toxicity and environmental protection. The decomposition temperature of magnesium hydroxide is as high as 350°C, with good thermal stability, which is suitable for the processing temperature of most polymer materials; high decomposition energy, which is conducive to absorbing combustion heat and improving flame retardant efficiency; strong acid neutralization ability, can be compared with Quickly neutralize the acid gas produced by the polymer during combustion, and has a strong ability to suppress smoke. As the first choice of inorganic flame retardant, it can be widely used in flame retardant fields such as plastics, rubber, and coatings. [0003] There are many methods for the preparat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K3/04C08K3/22C08L23/06
CPCC08K3/22C08K9/10C08K2003/2224C08L23/06C08L2201/02C08L2201/08C08K3/042
Inventor 韩志东王琇王春锋柳军旺王继华王永亮
Owner HARBIN UNIV OF SCI & TECH
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