Attapulgite grafted polymethyl methacrylate hybrid particle and preparation method thereof

A technology of polymethyl methacrylate and attapulgite, which is applied in the treatment of dyed organosilicon compounds, dyed polymer organic compounds, fibrous fillers, etc., can solve the problem of inability to form a hybrid network structure and low grafting rate , easy aggregation and other problems, to avoid the reduction of the activity of the initiator group, to overcome the effect of low grafting rate and low reaction temperature

Inactive Publication Date: 2013-04-03
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above method is mainly based on the "graft though" principle of in-situ polymerization / polymer attapulgite composite materials. The in-situ polymerization method uses a one-time molding technology to avoid thermal degradation of the polymer during extrusion, and the inorganic phase Dispersion is better than the mechanical blending method, but due to the microscopic inhomogeneity of the copolymerization system and the steric effect of the macromolecular chain, the probability of polymer grafting attapulgite with chemical bonds is not high, so the grafting rate is not high and cannot form Effective hybrid network structure, poor dispersion of attapulgite in polymerization, easy aggregation, low utilization rate, can not better combine the advantages of attapulgite and polymer properties, and the performance of composite materials is not high

Method used

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  • Attapulgite grafted polymethyl methacrylate hybrid particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Disperse 10g of attapulgite containing impurities in 100mL of distilled water, disperse by ultrasonic for 60min, add 0.2g of sodium hexametaphosphate, heat to 70°C, stir for 4h, pour out the upper suspension, remove the solvent, wash several times, vacuum dry, and grind Sieve to obtain purified attapulgite.

[0031] Disperse the purified attapulgite in 1 mol / L hydrochloric acid and vibrate ultrasonically for 6 minutes, remove the solvent after standing for 24 hours, wash until neutral, dry in vacuum, grind and sieve to obtain acid-activated attapulgite.

[0032] Take 4g of acid-activated attapulgite soil and disperse it in 100mL of toluene, ultrasonically disperse for 60min, add 8g of γ-aminopropyltriethoxysilane dropwise under stirring condition, after the dropwise addition, heat to 80°C, react for 12h, and the reaction ends Afterwards, the solvent is removed, vacuum-dried, ground and sieved to obtain aminoalkoxysilane-modified organic attapulgite.

[0033]Take 0.5g o...

Embodiment 2

[0035] Disperse 10g of attapulgite containing impurities in 200mL of distilled water, ultrasonically disperse for 30min, add 0.2g of sodium hexametaphosphate, heat to 80°C, stir for 6h, pour out the upper suspension, remove the solvent, wash several times, vacuum dry, and grind Sieve to obtain purified attapulgite.

[0036] Disperse the purified attapulgite in 0.5 mol / L dilute sulfuric acid and vibrate it ultrasonically for 30 minutes, remove the solvent after standing for 24 hours, wash until neutral, dry in vacuum, grind and sieve to obtain acid-activated attapulgite.

[0037] Take 4g of acid-activated attapulgite soil and disperse it in 150mL of toluene, ultrasonically disperse for 30min, add 4g of γ-aminopropyltrimethoxysilane dropwise under stirring condition, after the dropwise addition, heat to 110°C, react for 10h, after the reaction , remove the solvent, dry in vacuum, grind and sieve to obtain aminoalkoxysilane modified organic attapulgite.

[0038] Disperse 0.5g of...

Embodiment 3

[0040] Disperse 10g of impurity-containing attapulgite in 250mL of distilled water, disperse by ultrasonic for 40min, add 0.1g of sodium hexametaphosphate, heat to 60°C, stir for 5h, pour out the upper suspension, remove the solvent, wash several times, vacuum-dry, and grind Sieve to obtain purified attapulgite.

[0041] Disperse the purified attapulgite in 1 mol / L hydrochloric acid and vibrate ultrasonically for 40 minutes, let it stand for 24 hours, remove the solvent, wash until neutral, dry in vacuum, grind and sieve to obtain acid-activated attapulgite.

[0042] Take 4g of acid-activated attapulgite soil and disperse it in 100mL of xylene, disperse it ultrasonically for 40min, add 8g of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane dropwise under stirring condition, drop After the addition, heat to 140°C and react for 6 hours. After the reaction, remove the solvent, dry in vacuum, grind and sieve to obtain the aminoalkoxysilane-modified organic attapulgite.

[0043...

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Abstract

The invention relates to an attapulgite grafted polymethyl methacrylate hybrid particle and a preparation method thereof, and provides a hybrid particle which is prepared by taking methyl methacrylate and attapulgite clay as main raw materials, high in grafting rate and subjected to organic-inorganic connection by using chemical bonds. According to the invention, in accordance with a 'surface induced grafting' principle, an oxidation-reduction initiating system is formed by using attapulgite with amino and peroxydisulfate particles in aqueous phases, so that a graft polymerization reaction occurs on the surface of attapulgite, and then the attapulgite grafted polymethyl methacrylate hybrid particle is prepared. The preparation method of the hybrid particle, disclosed by the invention, is a soap-free emulsion method which can prevent the homopolymerization and reaction of monomers in low-polymer micelles in aqueous phases to the maximum extent, so that the monomers mainly take attapulgite particles as initial micelles for carrying out surface graft polymerization reaction. The polymer grafting rate of the prepared attapulgite grafted polymethyl methacrylate hybrid particle can reach 29.36%.

Description

technical field [0001] The invention relates to attapulgite-grafted polymethyl methacrylate hybrid particles and a preparation method thereof. Background technique [0002] Attapulgite clay is a kind of hydrous magnesium-rich aluminosilicate ore with special fibrous crystal structure, which is mainly composed of attapulgite. It is a unique clay mineral, the ideal molecular formula of attapulgite is (Mg, Al, Fe) 5 Si 8 o 20 (HO) 2 (OH 2 ) 4 . 4H 2 O, the basic structure is divided into three levels. One is the thickness and length of the crystal beam. Since the rod crystals are most tightly assembled in the crystal bundle, the finer the crystal bundle or the larger the proportion of the fine crystal bundle, the looser the microstructure of the attapulgite, and vice versa. The second is the aggregation state of the crystal beam. If the crystal beams are mostly parallel and closely gathered, the microstructure will be dense. Conversely, if the crystal beams are loos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/14C08F4/40C08F2/22C09C1/28C09C3/12C09C3/10
Inventor 龚方红杨海存刘惠倪庆婷叶青徐建平
Owner CHANGZHOU UNIV
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