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Methods for preparing quaternary phosphonium salt ionic liquid pillaring-modified montmorillonite and polymer/montmorillonite nanocomposite

A nano-composite material and ionic liquid technology, applied in the field of polymer/clay nano-composite materials, can solve the problems of restricting the application of organic montmorillonite, low thermal decomposition temperature of quaternary ammonium salts, poor polymer compatibility, etc. Simple operation, wide liquid temperature range and high thermal stability

Inactive Publication Date: 2011-02-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 2. The thermal decomposition temperature of the quaternary ammonium salt is low. When the montmorillonite modified by the quaternary ammonium salt is intercalated with engineering plastics, the discoloration of the polymer will be caused by the decomposition of the quaternary ammonium salt, which restricts the organic montmorillonite. Application in engineering plastics
The use of inorganic propping agents can withstand temperatures above 300 ° C, but the compatibility with polymers becomes poor, making it difficult for polymer macromolecules to enter between the layers of montmorillonite to form a real nanostructure composite Material

Method used

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  • Methods for preparing quaternary phosphonium salt ionic liquid pillaring-modified montmorillonite and polymer/montmorillonite nanocomposite
  • Methods for preparing quaternary phosphonium salt ionic liquid pillaring-modified montmorillonite and polymer/montmorillonite nanocomposite
  • Methods for preparing quaternary phosphonium salt ionic liquid pillaring-modified montmorillonite and polymer/montmorillonite nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Weigh 30g of sodium montmorillonite powder, add it to 100g of trihexyltetradecylphosphonium chloride ionic liquid at room temperature, and heat to 200°C;

[0036] (2) Stir the above solution at 200° C. for 30 minutes to carry out organic pillaring reaction modification of montmorillonite;

[0037] (3) The above solution is vacuum filtered, solid and liquid are separated, and the liquid is recovered and reused. The obtained solid is washed with deionized water, vacuum dried, ground, and passed through a 300-mesh sieve. The obtained solid is the quaternary phosphonium salt ionic liquid column Supported modified montmorillonite;

[0038] (4) Take by weighing 25g of the above-mentioned quaternary phosphonium salt ionic liquid pillar-supported modified montmorillonite, join in 475g polypropylene resin, mix uniformly, plasticize with two-roller open mill, pull sheet after mixing uniformly and take off, then Molded on a flat vulcanizing machine. The molding temperature i...

Embodiment 2

[0045] (1) Take by weighing 50g sodium montmorillonite powder, join in 10g triphenyldodecylphosphonium bromide ionic liquid;

[0046] (2) Stir the above solution for 480 min at 30° C. to carry out organic pillaring reaction modification of montmorillonite;

[0047] (3) The above solution is filtered, the solid and liquid are separated, and the liquid is recovered and reused. The obtained solid is washed with deionized water, vacuum-dried, ground, and passed through a 300-mesh sieve. The obtained solid is a modified quaternary phosphonium salt ionic liquid pillar. sex montmorillonite;

[0048] (4) Take by weighing 25g of the above-mentioned quaternary phosphonium salt ionic liquid pillared modified montmorillonite, join in 500g polyvinyl chloride resin, add 25g of rare earth stabilizer of polyvinyl chloride, mix uniformly, melt on the two-roller mixer Kneading, after mixing evenly, take off the tab, and mold it on a flat vulcanizing machine. The molding temperature is 175°C a...

Embodiment 3

[0054] (1) Weigh 300g of calcium-based montmorillonite powder and add it to 300g of trihexyloctadecylphosphonium tetrafluoroborate ionic liquid at room temperature;

[0055] (2) Stir the above solution at 120° C. for 240 min to carry out organic pillaring reaction modification of montmorillonite;

[0056] (3) The above solution is filtered, the solid and liquid are separated, and the liquid is recovered and reused. The obtained solid is washed with deionized water, vacuum-dried, ground, and passed through a 300-mesh sieve. The obtained solid is the quaternary phosphonium salt ionic liquid pillar Modified montmorillonite;

[0057] (4) Weigh 200g of the above-mentioned quaternary phosphonium salt ionic liquid pillared modified montmorillonite, add 200g of natural rubber to it, mix it on a two-roller mixer, remove the tab after mixing evenly, and obtain natural rubber / montmorillonite Masterbatch for destoned nanocomposites.

[0058] (5) Take 50g of the above-mentioned masterbat...

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Abstract

The invention relates to the field of polymer / montmorillonite nanocomposites, and discloses methods for preparing quaternary phosphonium salt ionic liquid pillaring-modified montmorillonite and the polymer / montmorillonite nanocomposite. The method for preparing the polymer / montmorillonite nanocomposite comprises the steps of performing pillaring-modification on montmorillonite by using quaternaryphosphonium salt ionic liquid and then intercalating the quaternary phosphonium salt ionic liquid pillaring-modified montmorillonite and a polymer or a polymeric monomer. In the methods, the montmorillonite is pillaring-modified directly by the quaternary phosphonium salt ionic liquid without water and any other solvent, and the ionic liquid can be recycled; the methods are simple, convenient to operate and environmentally-friendly, reduces the cost and saves energy consumption; and the quaternary phosphonium salt ionic liquid has more stable chemical properties and higher thermal stability, greatly improves the mechanical properties of the polymer material, can be applied to engineering plastics and heat-resisting polymers, and greatly expands the application range of the montmorillonite.

Description

technical field [0001] The invention relates to the field of polymer / clay nanocomposite materials, in particular to a preparation method of a quaternary phosphonium salt ionic liquid pillar-modified montmorillonite and a preparation method of a polymer / clay nanocomposite material. Background technique [0002] Polymer / montmorillonite nanocomposites have attracted great interest because of their excellent properties. Montmorillonite has a nanosheet structure. When they are uniformly dispersed in the polymer matrix as a single sheet, or the polymer molecular chain is inserted between the montmorillonite layers, the performance of the resulting nanocomposite can be significantly improved. , and even many new properties appear. Many polymer / montmorillonite nanocomposites have been successfully prepared by the intercalation method. [0003] Polymer / montmorillonite nanocomposites have the advantages of excellent comprehensive performance, lighter weight than conventional filling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/34C09C1/42C08L21/00C08L101/00D06M11/79C08K9/04C09C3/08C09D7/12
CPCY02P20/54
Inventor 戈明亮池水莲
Owner SOUTH CHINA UNIV OF TECH
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