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Nano-zirconium phosphate with functions of catalytic char formation and free radical quenching and its preparation method and application

A nano-zirconium phosphate and functional nano-technology, applied in the field of halogen-free flame retardants, can solve the problems of easy agglomeration and no way to solve the easy agglomeration of zirconium phosphate, and achieve easy agglomeration, excellent free radical quenching function, and air tightness and excellent thermal stability

Active Publication Date: 2018-06-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of easy agglomeration of zirconium phosphate exists, and the use of phosphaphenanthrene group directly in combination with zirconium phosphate cannot solve the problem of easy agglomeration of zirconium phosphate

Method used

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  • Nano-zirconium phosphate with functions of catalytic char formation and free radical quenching and its preparation method and application
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  • Nano-zirconium phosphate with functions of catalytic char formation and free radical quenching and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1) Intercalation and exfoliation of nano-zirconium phosphate: Add 400 mL of deionized water and 4.00 g (0.014 mol) of nano-zirconium phosphate (sheet diameter is about 500 nm) into a 1L four-neck flask at 0-5 °C, and stir ultrasonically 30min, zirconium phosphate is fully dispersed; 14.68g (0.014mol) tetrabutylammonium hydroxide (aqueous solution, mass concentration is 25%) is mixed with 130.40g deionized water and is mixed with the tetrabutylammonium hydroxide aqueous solution of 0.1mol / L, in Under the condition of ultrasonic stirring, add dropwise into the reaction kettle within 1 hour, continue ultrasonic stirring for 1 hour after dropping, then stop the ultrasonic wave, and continue stirring for 5 hours; Add dropwise into the reaction kettle, and continue ultrasonic stirring for 1 h; after the reaction, the mixed solution is centrifuged, the precipitate is washed three times with dioxane, and then dispersed in 400 mL of dioxane by ultrasonic stirring to form a suspen...

Embodiment 2

[0057] The difference between this example and Example 1 is that in step 1), zirconium phosphate with a sheet diameter of 1000nm is used instead, the ultrasonic stirring time is extended to 1.5h after the silane coupling agent is added dropwise, and the continuous stirring time is extended after stopping the ultrasonic to 6h. The flame retardant performance test and thermogravimetric analysis results are shown in Table 1.

Embodiment 3

[0059] The difference between this embodiment and Example 1 is that in step 1), zirconium phosphate with a sheet diameter of 1500nm is used instead, the ultrasonic stirring time is extended to 2h after the silane coupling agent is added dropwise, and the continuous stirring time is extended to 2h after stopping the ultrasonic. 7h. The flame retardant performance test and thermogravimetric analysis results are shown in Table 1.

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Abstract

The invention discloses nano zirconium phosphate with functions of catalyzing char-forming and quenching free radicals as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly intercalating and stripping nano zirconium phosphate by using an intercalator, carrying out acidification treatment to remove the intercalator and obtain single-laminar nano zirconium phosphate; and then grafting a phosphaphenanthrene group to the single-laminar nano zirconium phosphate through a silane coupling agent to prepare nano zirconium phosphate with the functions of catalyzing char-forming and quenching free radicals. Compared with the prior art, the prepared nano zirconium phosphate has excellent functions of catalyzing char-forming and quenching free radicals, is capable of effectively catalyzing char-forming of polymer under the high-temperature condition and inhibiting free radical chain reaction of polymer in gaseous phase so as to give high flame resistance to the polymer; a prepared flame-resistant polypropylene material can be widely applied to the fields of automotive exteriors, furniture and electric appliance, wires and cables, building materials and the like.

Description

technical field [0001] The invention relates to a halogen-free flame retardant, in particular to a nano-zirconium phosphate with the functions of catalyzing carbon formation and free radical quenching and its preparation method and application. Background technique [0002] In recent years, layered nanomaterials have attracted much attention in the field of polymer flame retardancy because of their excellent thermal stability and sheet barrier effect. They can form a barrier layer with good thermal stability and airtightness on the surface of the polymer during the combustion process of the polymer, and block the mass transfer and heat transfer process between the gas phase and the condensed phase. Among these layered nanomaterials, zirconium phosphate has good flame retardant performance in various polymer materials because of its strong designability and unique catalytic char formation. The morphology of layered nanomaterials has a decisive impact on its performance, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/00C09C3/08C09C3/12C08L23/12C08K9/06C08K3/32
CPCC01P2006/22C08K3/32C08K9/06C08K2003/328C08K2201/011C08L2201/02C08L2201/22C09C1/00C09C3/006C09C3/08C09C3/12C08L23/12
Inventor 赖学军谢华理曾幸荣李红强叶振兴
Owner SOUTH CHINA UNIV OF TECH
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