A kind of zinc borate, flame retardant composite material and preparation method thereof

A composite material, zinc borate technology, applied in the field of inorganic functional material science, can solve the problems of the deterioration of mechanical properties of polymer composite materials, poor compatibility of substrates, difficult to evenly disperse, and large size of zinc borate products, etc., to improve mechanical properties and Flame retardant performance, high product quality, and the effect of increasing the contact area between the two phases

Active Publication Date: 2022-04-22
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the longer reaction time required by this process, the production cost is higher. At the same time, due to the large size of the zinc borate product produced by this process, when it is used as a flame retardant and added to the polymer substrate, it will not mix with the polymer. The poor compatibility of the base material makes it difficult to disperse uniformly, resulting in a sharp deterioration of the mechanical properties of the polymer composite. At the same time, there will be uneven decomposition during the flame retardant process, which will affect the overall flame retardant efficiency. These factors limit its application. scope

Method used

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  • A kind of zinc borate, flame retardant composite material and preparation method thereof
  • A kind of zinc borate, flame retardant composite material and preparation method thereof
  • A kind of zinc borate, flame retardant composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 3ZnO·3B 2 o 3 3.5H 2 O preparation

[0025] Add 40mL of solvent water into the reactor at normal pressure, heat and stir in an oil bath at 100°C, add 5.26g of zinc oxide under the state of boiling and refluxing the solvent water to form a heterogeneous solution system, stir at 200r / min for 5min, and then add 20.0g boric acid. The ratio of boric acid to zinc oxide is 5:1, and the ratio of boric acid to water is 2:1. After the reaction lasts for 3 hours, the obtained product is filtered and washed with hot water above 90°C to obtain zinc borate 3ZnO 3B 2 o 3 3.5H 2 O, the sample was air-dried at 80°C to obtain 3ZnO·3B 2 o 3 3.5H 2 O product 15.5g.

[0026] figure 1 For the XRD spectrum of the product prepared in Example 1, it can be seen from the figure that all diffraction peaks belong to JCPDS 35-0433 standard 3ZnO 3B 2 o 3 3.5H 2 O diffraction peak, and no other impurity peaks appear.

Embodiment 2

[0027] Example 2 3ZnO·3B 2 o 3 3.5H 2 O preparation

[0028] Add 50mL of solvent water into the reactor at normal pressure, heat and stir in an oil bath at 150°C, add 3.75g of zinc oxide into the solvent water under vigorous boiling and reflux to form a heterogeneous solution system, stir at 400r / min for 5min, and then add 20.0 g boric acid. The ratio of boric acid to zinc oxide is 7:1, and the ratio of boric acid to water is 2.5:1. After the reaction is continued for 1 hour, the obtained product is filtered and washed with hot water above 90°C to obtain zinc borate 3ZnO 3B 2 o 3 3.5H 2 O, the sample was air-dried at 80°C to obtain 3ZnO·3B 2 o 3 3.5H 2 O product 12.9 g.

Embodiment 3

[0029] Example 3 3ZnO·3B 2 o 3 3.5H 2 O preparation

[0030] Add 40mL of solvent water into the reactor at normal pressure, heat and stir in an oil bath at 100°C, add 4.38g of zinc oxide into the water under the state of vigorous boiling and reflux of the solvent water, stir at 300r / min for 5min, then add 20.0g of boric acid, The ratio of boric acid to zinc oxide is 6:1, and the ratio of boric acid to water is 2.25:1. After the reaction lasts for 1.5 hours, the product obtained is filtered and washed with hot water above 90°C to obtain zinc borate 3ZnO·3B 2 o 3 3.5H 2 O, the sample was air-dried at 60°C to obtain 3ZnO·3B 2 o 3 3.5H 2 O product 13.9 g.

[0031] figure 2 3ZnO 3B prepared for Example 3 2 o 3 3.5H 2 Transmission electron microscope image of O; image 3 It is a scanning electron microscope picture of Example 3, showing that the product size is 50-100nm and the thickness is about 10-20nm.

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Abstract

The inventor provides a preparation method of zinc borate, which includes the following steps: crystallization: adding zinc oxide into continuously boiling water, stirring and dissolving, then adding boric acid, adding boric acid and continuing to stir until zinc borate crystals are formed, and a mixture containing crystals is obtained ; Purification: filter the mixture containing crystals, wash with hot water, and dry to obtain zinc borate crystals. The above technical scheme has simple process, high production efficiency and high product quality. When the nano-zinc borate is applied to a polymer substrate to prepare a flame-retardant composite material, the mechanical properties and flame-retardant properties of the composite material can be effectively improved.

Description

technical field [0001] The invention relates to the scientific field of inorganic functional materials, in particular to a zinc borate, a flame-retardant composite material and a preparation method thereof. Background technique [0002] Zinc borate has been widely used in industry since the middle of the 20th century. It can be used as a non-toxic, non-polluting, environmentally friendly flame retardant, and an inorganic additive for anti-wear and anti-friction in lubricating oil. Applications. As a flame retardant material, unlike traditional halogen flame retardants that release toxic gases when burned, zinc borate can not only play a flame retardant effect in polymers, but also effectively inhibit the release of smoke during combustion. In addition, zinc borate can also be used as a synergist to synergize flame retardancy with different types of flame retardants, and has received extensive attention and application under the current trend of polymer flame retardancy rese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/38C08L23/08
CPCC08K3/38C08K2003/387C08K2201/011C08L2201/02C08L23/0853
Inventor 王雪松李鸿辉陈雯丹朱虎张钦辉
Owner FUJIAN NORMAL UNIV
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