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A kind of preparation method and application of epoxy-based organically modified montmorillonite

A montmorillonite and epoxy-based technology, which is applied in the field of nanocomposite material preparation, can solve the problems of poor dispersibility of modified montmorillonite, cumbersome process, insignificant compatibilization and enhancement effect, etc., and achieves low cost and simple and easy process. , the effect of improving the dispersion

Active Publication Date: 2022-06-21
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve the purpose, it is often necessary to modify the montmorillonite multiple times or add other compatibilizers during processing, and the process is cumbersome
Moreover, the current modified montmorillonite has poor dispersion in biodegradable polyester systems such as polylactic acid, and the compatibilization and enhancement effect is not obvious, lacking the potential for industrial application

Method used

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  • A kind of preparation method and application of epoxy-based organically modified montmorillonite
  • A kind of preparation method and application of epoxy-based organically modified montmorillonite
  • A kind of preparation method and application of epoxy-based organically modified montmorillonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 50 mL of epichlorohydrin, dissolve it in 200 mL of ethanol, and raise the temperature to 60°C. Slowly add dodecyl dimethyl tertiary amine, the molar ratio of epichlorohydrin and dodecyl dimethyl tertiary amine is 1.5:1, mechanically stir at 200r / min speed for 3h, and cool to room temperature. The above solution was distilled under reduced pressure using a rotary evaporator, and ethanol was added for repeated washing three times to obtain a pale yellow paste, that is, epoxy quaternary ammonium salt.

[0031] Take 2g of sodium montmorillonite with a cation exchange capacity of 100meq / 100g (meq / 100g is the unit of cation exchange capacity, 1meq / 100g means that each gram of sodium montmorillonite contains 1mmol of exchangeable Na + ion), add 250 mL of deionized water, and ultrasonically disperse to prepare a montmorillonite suspension. Take 2.5 g of epoxy quaternary ammonium salt, dissolve it in 50 mL of deionized water, and slowly drop it into the montmorillonite sus...

Embodiment 2

[0034] Take 50 mL of epichlorohydrin, dissolve it in 200 mL of ethanol, and raise the temperature to 65°C. Slowly add tetradecyl dimethyl amine, the molar ratio of epichlorohydrin and tetradecyl dimethyl tertiary amine is 1.3:1, mechanically stir at 200r / min for 4h, and cool to room temperature. The above solution was distilled under reduced pressure using a rotary evaporator, and ethanol was added for repeated washing three times to obtain a pale yellow paste, that is, epoxy quaternary ammonium salt.

[0035] Take 2 g of sodium-based montmorillonite with a cation exchange capacity of 100 meq / 100 g, add 250 mL of deionized water, and ultrasonically disperse to obtain a montmorillonite suspension. Take 2 g of epoxy quaternary ammonium salt, dissolve it in 50 mL of deionized water, and slowly drop it into the montmorillonite suspension. The temperature was raised to 65°C and mechanically stirred at a speed of 500r / min for 6h, and the yellow montmorillonite suspension gradually ...

Embodiment 3

[0038]Take 50 mL of epichlorohydrin, dissolve it in 200 mL of ethanol, and raise the temperature to 70°C. Slowly add octadecyl dimethyl tertiary amine, the molar ratio of epichlorohydrin and octadecyl dimethyl tertiary amine is 1.2:1, stir mechanically at 200r / min speed for 5h, and cool to room temperature. The above solution was distilled under reduced pressure using a rotary evaporator, and ethanol was added for repeated washing three times to obtain a pale yellow paste, that is, epoxy quaternary ammonium salt.

[0039] Take 2 g of sodium-based montmorillonite with a cation exchange capacity of 100 meq / 100 g, add 250 mL of deionized water, and ultrasonically disperse to obtain a montmorillonite suspension. Take 1.5g of epoxy quaternary ammonium salt, dissolve it in 50mL of deionized water, slowly add it dropwise to the montmorillonite suspension, raise the temperature to 65°C, stir mechanically at 500r / min for 6h, the yellow montmorillonite suspension gradually turns white. ...

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Abstract

The invention discloses a preparation method and application of epoxy-based organically modified montmorillonite. The preparation method comprises: (1) dissolving epichlorohydrin in an organic solvent, adding a long-chain tertiary amine, and performing an addition reaction to obtain Epoxy quaternary ammonium salt; (2) disperse natural montmorillonite in deionized water to obtain montmorillonite suspension; (3) dissolve epoxy quaternary ammonium salt in deionized water to obtain epoxy quaternary ammonium salt solution; (4) Epoxy quaternary ammonium salt solution is added dropwise to montmorillonite suspension, and montmorillonite is modified by ion exchange reaction to obtain initial product; (5) initial product is centrifuged, washed, dried, refined, A powdery epoxy-based organically modified montmorillonite was obtained. The organically modified montmorillonite prepared by the present invention has a relatively large interlayer distance, and it has active epoxy groups at the same time, which can improve the dispersibility of montmorillonite in the biodegradable polyester blend system, and better play Increase capacity and enhance effect.

Description

technical field [0001] The invention belongs to the field of preparation of nano-composite materials, and in particular relates to a preparation method of epoxy-based organically modified montmorillonite. Background technique [0002] Montmorillonite is a layered silicate natural mineral with abundant reserves in the earth's crust and wide application fields. The surface of the silicate sheet is negatively charged, and a large number of cations are adsorbed between the layers, which accumulate into clusters by the electrostatic interaction between the layers. The special lamellar structure determines the unique properties of montmorillonite, such as large specific surface area, good ion exchange capacity and hydrophilic and oleophobic properties. As a silicate inorganic filler, the hydrophilic and oleophobic properties of montmorillonite limit its application in polymers, but its special structure endows it with great potential for organic modification. [0003] In order t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02C08K9/04C08K3/34
CPCC08L67/04C08L2201/06C08K2201/005C08L67/02C08K9/04C08K3/346
Inventor 余鹏张杰田瑶吕若昀赵西坡
Owner HUBEI UNIV OF TECH
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