M-SiO2 (at) EDTMPA composite material and preparation method and application thereof

Abstract

The invention belongs to the field of material processing, and discloses an m-SiO2 (at) EDTMPA composite material as well as a preparation method and application thereof. The composite material is spherical particles with the particle size of 80-100 nm, and is composed of mesoporous silica m-SiO2 and ethylenediamine tetramethylenephosphonic acid (EDTMPA) loaded in mesoporous channels of the mesoporous silica m-SiO2. The preparation method comprises the following steps: mixing ethylenediamine tetramethylenephosphonic acid and mesoporous silica according to a mass ratio of (0.5-3): 1, heating until the ethylenediamine tetramethylenephosphonic acid is molten, then keeping for 3-15 minutes, and cooling to obtain the m-SiO2-coated EDTMPA composite material. The invention further discloses application of the m-SiO2 coated EDTMPA composite material as a flame retardant. According to the preparation method, molten ethylenediamine tetramethylenephosphonic acid is loaded into nanoscale mesoporous silica, and the ethylenediamine tetramethylenephosphonic acid can be nanocrystallized and compounded within 15 minutes, so that the ethylenediamine tetramethylenephosphonic acid shows good flame retardant property in a polymer.

Description

technical field [0001] The invention belongs to the field of material processing, in particular to a kind of m-SiO 2 @EDTMPA composites and preparation methods and applications. Background technique [0002] Ethylenediaminetetramethylenephosphonic acid (EDTMPA) has strong chelating properties and can form stable complexes with iron ions, copper, aluminum, zinc, calcium, magnesium and other ions; Good scale inhibition effect, commonly used in industrial circulating cooling water, boiler water, power plant circulating water as a scale and corrosion inhibitor, and can also be used as a complexing agent for cyanide-free electroplating; this product is simple to produce and high in output, but has a single use. Its use needs to be expanded. [0003] Ethylenediaminetetramethylenephosphonic acid contains phosphorus and nitrogen elements with flame retardant functions, but due to its strong acidity, it cannot be used directly as a flame retardant. In addition, ethylenediaminetetr...

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Problems solved by technology

[0004] In order to overcome the shortcomings that ethylenediaminetetramethylenephosphonic acid cannot be directly used as a flame retardant due to its strong acidity, the purpose of the present invention is to provide a m-SiO 2 @EDTMPA Composite materials and preparation methods and applications

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