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Method for modifying surface of palygorskite by phosphoric acid and fatty acid

A technology of fatty acid modification and palygorskite, applied in the surface modification of palygorskite, using phosphoric acid and fatty amine to modify the surface of palygorskite, which can solve the problems of insufficient mechanical properties and other problems

Active Publication Date: 2018-09-07
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method utilizes the adsorption properties of palygorskite to boric acid, and the mechanical properties are not excellent enough.

Method used

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  • Method for modifying surface of palygorskite by phosphoric acid and fatty acid
  • Method for modifying surface of palygorskite by phosphoric acid and fatty acid
  • Method for modifying surface of palygorskite by phosphoric acid and fatty acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Disperse 3g phosphoric acid in 150mL absolute ethanol, at 70 o Stir at C for 5min; add 30g palygorskite, stir for 2h; add 3g dodecylamine, stir for 3h; then filter and centrifuge while hot, wash with hot ethanol for many times, and finally vacuum dry in a 60°C oven to obtain the modified slope rayonite.

Embodiment 2

[0028] Disperse 3g phosphoric acid in 150mL absolute ethanol, at 70 o Stir at C for 8min; add 30g palygorskite, stir for 3h; add 3g dodecylamine, stir for 4h, then filter and centrifuge while hot, wash with hot ethanol for many times, and finally vacuum dry in a 60°C oven to obtain the modified slope rayonite.

Embodiment 3

[0030] Disperse 6g phosphoric acid in 150mL absolute ethanol, stir at 70°C for 5min; add 30g palygorskite, stir for 2h; add 3g dodecylamine, stir for 3h, then filter and centrifuge while hot, wash with hot ethanol for many times, and finally The modified palygorskite was obtained by vacuum drying in an oven at 60°C.

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Abstract

The invention discloses a surface modification method for a palygorskite flame retardant, wherein the method comprises the steps: adding palygorskite original soil into an ethanol solution of phosphoric acid, and carrying out a stirring reaction for 1-6 h; then adding fatty amine, and continuing to carry out stirring reaction for 1-5 h; then filtering and centrifuging while being hot, washing withhot ethanol, drying in vacuum, and thus obtaining the modified palygorskite flame retardant. The electrical properties of palygorskite are used for ion exchange modification, that is to say, a flameretardant element P is introduced, and at the same time, the hydrophobic property and the dispersity and solubility in a matrix material are improved. The palygorskite flame retardant can effectivelyimprove the dispersity and flame retardancy of the organic matrix material when being applied in the organic matrix material.

Description

technical field [0001] The invention relates to a method for modifying the surface of palygorskite, in particular to a method for modifying the surface of palygorskite by using phosphoric acid and aliphatic amine, and belongs to the technical field of material processing. Background technique [0002] The fields of application of polymers continue to expand, requiring improved mechanical, thermal and electrical properties to withstand increasingly stringent conditions. It is equally important to reduce their ignition tendency or combustion efficiency. Traditionally, halogenated flame retardants are added to improve the flame retardant properties of polymers. However, during combustion, halogenated flame retardants release toxic dioxins and furans, which pose a threat to human health and environmental pollution. Therefore, there is an urgent need for us to research and explore new technologies for efficient green flame retardant. [0003] At present, polymer nanocomposites...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K9/02C08K9/04C08K3/34C08K7/24C08L23/08
CPCC08K3/34C08K7/24C08K9/02C08K9/04C08K9/10C08L2201/02C08L23/0853
Inventor 杨志旺李丽魏红杨娇梁习习张哲杨尧霞雷自强
Owner NORTHWEST NORMAL UNIVERSITY
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