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Layered double hydroxide-molybdate ion modified graphene flame-retarding and smoke-inhibiting agent and preparation method of same

A technology of molybdate ion and hydroxide, which is applied in the field of flame retardant and smoke suppressant, can solve the problems of reduced flame retardant efficiency, poor dispersion, and decreased physical and mechanical properties of polymers, so as to improve the performance of flame retardant and smoke suppressor, The effect of improving mechanical properties

Active Publication Date: 2017-09-15
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong van der Waals force between graphene sheets, graphene is prone to agglomeration, resulting in poor dispersion in polymers and reduced flame retardant efficiency. A larger amount of addition is required to achieve better performance. The flame retardant effect, and the increase of the added amount often leads to the decline of the physical and mechanical properties of the polymer, thus limiting the application of graphene in polymer flame retardant

Method used

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  • Layered double hydroxide-molybdate ion modified graphene flame-retarding and smoke-inhibiting agent and preparation method of same
  • Layered double hydroxide-molybdate ion modified graphene flame-retarding and smoke-inhibiting agent and preparation method of same
  • Layered double hydroxide-molybdate ion modified graphene flame-retarding and smoke-inhibiting agent and preparation method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Preparation and Application of Flame Retardant and Smoke Suppressant

[0012] 1. Preparation of Flame Retardant and Smoke Suppressant

[0013] (1) Weigh 7.5g of Al(NO 3 ) 3 9H 2 O and 25.6g of Mg(NO 3 ) 2 ·6H 2 O, dispersed and dissolved in 150ml deionized water to obtain a uniform salt solution;

[0014] (2) Take 0.64g graphene and be dispersed in 150ml alkaline solution (NaOH concentration is 0.20M, Na CO Concentration is 0.05M), ultrasonic 30 minutes, obtain the graphene dispersion liquid of uniform dispersion;

[0015] The salt solution prepared in step (1) is added dropwise in the above-mentioned graphene dispersion liquid, stirs rapidly while adding dropwise; (time, speed)

[0016] Use 0.2M NaOH solution to adjust the pH value of the mixture to 8, stir the mixture at 40°C for 36h, then add 0.75ml N 2 h 2 ·H 2 O, heat up to 100°C, react at constant temperature for 3 hours, wash the product twice with deionized water and absolute ethanol in turn...

Embodiment 2

[0021] Example 2: Preparation and Application of Flame Retardant and Smoke Suppressant

[0022] 1. Preparation of Flame Retardant and Smoke Suppressant

[0023] (1) Weigh 37.5g of Al(NO3)3.9H2O and 59.4g of Zn(NO3)2.6H2O, disperse and dissolve in 500ml deionized water to obtain a uniform salt solution;

[0024] (2) Weigh 1.2g graphene and disperse it into 150ml alkaline solution (NaOH concentration is 0.20M, NaOH 2 CO 3 Concentration is 0.05M), ultrasonic 20 minutes, obtain the graphene dispersion liquid of uniform dispersion;

[0025] The salt solution prepared in step (1) is added dropwise in the above-mentioned graphene dispersion liquid, stirs rapidly while adding dropwise; (time, speed)

[0026] Use 0.5M NaOH solution to adjust the pH value of the mixture to 11, stir the mixture at 60°C for 24h, then add 1.5ml N 2 h 2 ·H 2 O, heat up to 110°C, react at constant temperature for 2 hours, wash the product three times with deionized water and absolute ethanol in turn, a...

Embodiment 3

[0031] Example 3: Preparation and Application of Flame Retardant and Smoke Suppressant

[0032] 1. Preparation of Flame Retardant and Smoke Suppressant

[0033] (1) Weigh 14.0625g of Al(NO 3 ) 3 9H 2 O and 54.5625g of Co(NO 3 ) 2 ·6H 2 O, dispersed and dissolved in 150ml deionized water to obtain a uniform salt solution;

[0034] (2) Take 0.82g graphene and be dispersed in 150ml alkaline solution (NaOH concentration is 0.20M, Na CO Concentration is 0.05M), ultrasonic 30 minutes, obtain the graphene dispersion liquid of uniform dispersion;

[0035] The salt solution prepared in step (1) is added dropwise in the above-mentioned graphene dispersion liquid, stirs rapidly while adding dropwise; (time, speed)

[0036] Use 0.4M NaOH solution to adjust the pH value of the mixture to 10, stir the mixture at 80°C for 12h, then add 0.75ml N 2 h 2 ·H 2 O, heat up to 120°C, react at constant temperature for 1 hour, wash the product three times with deionized water and absolute et...

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Abstract

The invention belongs to the technical field of flame-retarding and smoke-inhibiting agents and particularly relates to a layered double hydroxide-molybdate ion modified graphene flame-retarding and smoke-inhibiting agent and a preparation method of same. The preparation method includes the steps of supporting LDH onto surface of graphene and intercalating molybdate ions between layers of the LDH. The flame-retarding and smoke-inhibiting agent not only improves the flame-retarding and smoke-inhibiting performances of a polymer but also improves physical and mechanical performances of the polymer.

Description

technical field [0001] The invention belongs to the technical field of flame retardant and smoke suppressant, in particular to a layered double hydroxide-molybdate ion modified graphene flame retardant and smoke suppressant and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional honeycomb planar structure composed of a single layer of carbon atoms densely packed. Due to its large surface area and excellent electrical, optical, mechanical and thermal properties, it has been favored by researchers in many fields in recent years. Extensive attention and research. The article "Research Progress in Graphene / Polymer Composite Materials" in the 2016 Volume 44 Issue 2 of the Chinese journal "Plastic Industry" pointed out that adding graphene to some polymers can improve their flame retardancy. In fact, the improvement of flame retardancy of graphene composite polymer materials is mainly due to the physical barrier function of graphene sheets wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/02C08K7/00C08K3/04C08L75/04C08L23/08
CPCC08K3/04C08K7/00C08K9/02C08L2201/02C08L75/04C08L23/08
Inventor 徐文总张丙亮徐宝羚李爱娇
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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