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Flame-retardant emulsion and preparation method and application thereof

A flame-retardant, emulsion technology, applied in the field of flame-retardant materials, can solve problems such as high equipment requirements, complicated preparation process, and difficult waste liquid treatment

Inactive Publication Date: 2018-05-08
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0004] The Chinese patent application with the application number 2013103607613 discloses a preparation method of a magnesium hydroxide-coated microsphere flame retardant. In this method, magnesium hydroxide-coated carbon microspheres with glucose as a raw material are made into a flame retardant, but There are many steps and the process is cumbersome
The Chinese patent application with the application number 2017103519432 discloses the preparation of a nano-composite microsphere flame retardant and its application in plastics, using nano-magnesium oxide, aluminum hydroxide and diatomaceous earth in a supercritical reaction under alkaline conditions The nanocomposite material obtained by high temperature treatment after reaction in the kettle, the preparation process of this method is complicated, the equipment requirements are high, and it is not conducive to industrial production
The Chinese patent application with the application number 2013100456931 discloses a core-shell nano-polymer microsphere flame retardant, its preparation method and application. It uses emulsion polymerization to combine monomers containing phosphorus and nitrogen with common bis Bonded polymerizable monomers are copolymerized to obtain nano-scale polymer microspheres. Although the high molecular weight of the small molecule flame retardant is achieved and the compatibility between the flame retardant and the polymer matrix is ​​increased, a large amount of organic compounds are used in the reaction. Reagents, complex reaction process
The Chinese patent application with the application number 2016109895730 discloses a water-based flame-retardant emulsion. This method prepares a water-based flame-retardant emulsion by mixing relevant organic reagents, water, surfactants, and initiators. This method uses many chemicals and wastes Liquid handling is difficult
[0005] So far, the preparation of functional materials using microemulsions as templates has become a research hotspot. However, the use of assembly technology to control the arrangement of nanoparticles at the emulsion interface, two-dimensional materials to coat emulsion microspheres, and the preparation of flame-retardant emulsions have not yet been reported.

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[0029] The preparation process of a kind of flame-retardant emulsion of the present invention is as follows: figure 2 shown.

[0030] Each starting material in the preparation method of the present invention can be purchased from the market or prepared according to the prior art methods. The nano-hydroxyapatite of two-dimensional network structure refers to the prior art (H.Li, D.B.Wu, J.Wu, L.Y.Dong, Y.J.Zhu, X.L.Hu, "Flexible, High-Wettability and Fire-Resistant Separators Based on Hydroxyapatite Nanowires for Advanced Lithium-Ion Batteries", Advanced Materials, 2017) and prepared through further improvement, the specific steps are described in the examples. The hydroxyapatite purchased in the market is generally spherical, rod-shaped or needle-shaped, and does not have a network structure; while the nano-hydroxyapatite prepared by the present invention has a two-dimensional network structure.

[0031] In the experimental operation of the examples, the room temperature is...

Embodiment 1

[0045] A flame retardant emulsion, its preparation method is as follows:

[0046] (1) Mix disodium hydrogen phosphate, calcium chloride and water in a mass ratio of 1:5:500, heat at 100°C for 48 hours, wash with water until neutral, and dry at 105°C to obtain a two-dimensional network Structure of the nanomaterial hydroxyapatite.

[0047] (2) Ammonium persulfate, styrene and water are mixed according to the mass ratio of 1:100:200, and at room temperature (25 ± 1° C.), obtain a polystyrene microemulsion after stirring and reacting at 100 r / min for 30 min; The hydroxyapatite and polystyrene microsphere emulsions prepared in 1) were mixed according to the mass ratio of 10% and 90%, and stirred at 500r / min for 60min at 30°C to complete the assembly process.

[0048] Apply the prepared flame-retardant emulsion to paper (quantitative 80g / m2) at room temperature (about 25°C) 2 The upper and lower surfaces of the A4 copy paper, the same below), the limiting oxygen index (LOI) was m...

Embodiment 2

[0050] A flame retardant emulsion, its preparation method is as follows:

[0051] (1) Mix disodium hydrogen phosphate, calcium chloride and water in a mass ratio of 1:1:200, heat at 300°C for 12 hours, wash with water until neutral, and dry at 105°C to obtain a two-dimensional network Structure of the nanomaterial hydroxyapatite.

[0052] (2) Azobisisobutyronitrile, styrene and water were mixed according to the mass ratio of 1:50:50, and stirred and reacted at 2000r / min for 5min at room temperature (25±1°C) to obtain a polystyrene microemulsion. Mix the hydroxyapatite and polystyrene microsphere emulsion prepared in step (1) according to the mass ratio of 20% and 80%, and stir at 50° C. at 5000 r / min for 20 minutes to complete the assembly process.

[0053] Apply the prepared flame-retardant emulsion to paper (quantitative 80g / m2) at room temperature (about 25°C) 2 The upper and lower surfaces of the A4 copy paper, the same below), the limiting oxygen index (LOI) was measure...

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Abstract

The invention belongs to the field of flameresistant materials, and discloses a flame-retardant emulsion and preparation method and application thereof. The preparation method of the flame-retardant emulsion is divided into two steps that firstly, flame-retardant nanoparticles with two-dimensional network structure are prepared; then, the flame-retardant nanoparticles are assembled on the surfacesof oil water emulsion microspheres, flame-retardant emulsion is prepared. The flame-retardant emulsion not only has good compatibility, can realize the assembly design of flame-retardant particles under nanometer size, but also can apply flame retardancy to materials, can be applied to the preparation of all kinds of flame-retardant materials, such as flame-retardant paper, flame-retardant film and flame-retardant fiber and other flame-retardant materials.

Description

technical field [0001] The invention belongs to the field of flame retardant materials, and in particular relates to a flame retardant emulsion and its preparation method and application. Background technique [0002] With the development of society and the progress of science and technology, people pay more and more attention to advanced functional materials. There are four main ways to prepare functional materials: physical method, chemical method, surface processing method and composite method. Traditional flame retardant material processing methods cannot load a large amount of flame retardant structures or groups on the surface and interior of the material, resulting in a low proportion of flame retardant structures. Therefore, how to solve the compatibility of multiple materials and the design of flame retardancy has become a bottleneck problem in the preparation of flame retardant materials. [0003] The research on flame retardant materials in foreign countries is ...

Claims

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Application Information

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IPC IPC(8): C08F112/08C08K3/32C09D125/06C09D5/18
CPCC08F112/08C08K3/32C08K2003/325C08K2201/011C09D5/18C09D125/06
Inventor 李金鹏王斌陈克复
Owner SOUTH CHINA UNIV OF TECH
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