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Preparation method and application of modified fly ash floating bead loaded DOPO

A fly ash floating beads and modification technology, which is applied in the preparation and application field of modified fly ash floating beads loaded DOPO, can solve the problems of application range and application energy efficiency limitations, and achieve broad application prospects and market demand, Reduce processing viscosity and improve fluidity

Inactive Publication Date: 2020-02-21
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its application range and application energy efficiency are limited, and surface or structure modification must be carried out to enhance its activity, such as acid solution modification, active agent modification, coupling agent modification, etc.

Method used

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  • Preparation method and application of modified fly ash floating bead loaded DOPO
  • Preparation method and application of modified fly ash floating bead loaded DOPO
  • Preparation method and application of modified fly ash floating bead loaded DOPO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Operation steps for applying K-FB@DOPO to thermoplastic polyurethane elastomer flame retardancy:

[0038] 1. Hydroxylation and modification of fly ash floating beads:

[0039] (1). Fly ash bleaching bead bleaching and hydroxylation treatment:

[0040] a. Take 120g of fly ash floating beads that have been screened and pretreated through a 100-mesh sieve, rinse and sort out the fly ash floating beads floating on the surface with deionized water, and place them in a 500ml beaker.

[0041] b. Add 200ml concentration of 3wt% dilute nitric acid solution and stir for 30min to remove impurities on the surface of fly ash floating beads.

[0042]c. Pour in 15ml of 30wt% hydrogen peroxide and 35ml of 98wt% concentrated sulfuric acid solution, and stir on an electric furnace at 200°C for 10min.

[0043] d. Then filter the sample to neutral, and dry it in an oven at 120°C for 3 hours.

[0044] e. Calcinate the dried fly ash beads in a tube furnace with a nitrogen atmosphere at 40...

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Abstract

The invention relates to a fly ash floating bead surface modification loading technology, and concretely relates to a method for carrying out surface modification on fly ash floating beads by using aplurality of coupling agents and compounding the fly ash floating beads with a flame retardation synergist 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The preparation method comprisesthe following steps: carrying out bleaching, hydroxylation and acid pretreatment on fly ash, then carrying out surface modification treatment on the pretreated fly ash by using a coupling agent, and finally loading a flame retardant synergist DOPO. According to the method, after surface modification of fly ash, the physical and chemical properties of the surface of the obtained surface-modified fly ash floating bead are changed, so the compatibility of the filler and crystal interfaces such as the elastomer in the thermoplastic polyurethane elastomer is improved; and thus, the mechanical property, the flame retardant property and other properties of the thermoplastic polyurethane elastomer are improved, an improvement method is provided for better utilization of the fly ash, and the pollution to the environment is reduced.

Description

technical field [0001] The present invention relates to the application field of surface modification of fly ash floating beads and flame retardant synergist 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), in particular to an improved Method and application of flame retardant synergist DOPO loaded on permanent fly ash floating beads. Background technique [0002] Fly ash floating beads are a kind of fly ash hollow balls that can float on the water surface. They are off-white, thin-walled and hollow, very light in weight, and have a bulk density of 720kg / m. 3 (heavy), 418.8kg / m 3 (lightweight), particle size about 0.1 mm, closed and smooth surface, large specific surface area, strong filling capacity, and uniform scale. The chemical composition of fly ash floating beads is mainly silicon dioxide and aluminum oxide, of which silicon dioxide is about 50-65%, and aluminum oxide is about 25-35%. Fly ash floating beads are thin and hollow, and the cavity is semi-vacu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/12C08K5/5313C08L75/04
CPCC08K5/5313C08K9/12C08L2201/02C08L2207/04C08L75/04
Inventor 郑玉婴曹爱萍
Owner FUZHOU UNIV
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