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Process for preparing attapulgite based composite material

A composite material, attapulgite technology, applied in the direction of fibrous filler, dyed organosilicon compound treatment, etc., can solve problems such as poor compatibility, and achieve the effect of simple preparation process and method

Active Publication Date: 2009-07-01
YANTAI ZHONGKE RES INST OF ADVANCED MATERIALS & GREEN CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because the surface of attapulgite is rich in polar silanol groups, it has poor compatibility with non-polar organic solvents, which limits the application of attapulgite materials to a certain extent.

Method used

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  • Process for preparing attapulgite based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In a 400mL beaker, 5.0g of attapulgite raw soil was dispersed in 200mL of deionized water, and ultrasonically treated at 40°C with a power of 40KHz for 8h. Take the supernatant, centrifuge, and weigh about 2.0 g of the obtained solid matter after drying. Grind and disperse the obtained solid substance in 50 mL of 2.0 mol / L aqueous hydrochloric acid solution, soak in the hydrochloric acid solution for about 4 hours, wash repeatedly with deionized water until the filtrate is neutral, and vacuum dry at 40°C for 72 hours to obtain Fibrous attapulgite with more hydroxyl groups on the surface.

[0034] The purified attapulgite was ultrasonically dispersed in toluene, an appropriate amount of aminopropyltriethoxysilane was added thereto, and the attapulgite was treated at 60° C. for 2 hours to obtain a surface-aminated attapulgite.

[0035] The surface aminated attapulgite and the ionic liquid 1-carboxyethyl-3-butylimidazolium chloride containing carboxyl functional group wer...

Embodiment 2

[0038]Using the same method as in Example 1, the surface aminated fibrous attapulgite was obtained.

[0039] The surface aminated attapulgite and the ionic liquid 1-carboxypropyl-3-hexylimidazolium chloride containing carboxyl functional group were ultrasonically dispersed in n-hexane, and stirred and reacted at 60° C. for 2 h. After the solvent is removed by centrifugation, the product is washed with a large amount of ethanol to remove unreacted ionic liquid, and vacuum-dried at 40-100° C. to obtain an attapulgite-based composite material whose surface is modified by a functionalized ionic liquid. The composite material is a hydrophilic material.

[0040] The attapulgite composite material modified by the functionalized ionic liquid whose anion is chloride ion is ultrasonically dispersed in water, and a sodium trifluoromethanesulfonate solution with a concentration of 1.0 mol / L is added to it, and the attapulgite / ionic liquid composite material is formed by hydrophilic Aqueo...

Embodiment 3

[0042] Using the same method as in Example 1, the surface aminated fibrous attapulgite was obtained.

[0043] The surface aminated attapulgite and the ionic liquid 1-carboxyethyl-3-octylimidazolium chloride containing carboxyl functional group were ultrasonically dispersed in n-hexane, and stirred and reacted at 60° C. for 2 h. After the solvent is removed by centrifugation, the product is washed with a large amount of ethanol to remove unreacted ionic liquid, and vacuum-dried at 40-100° C. to obtain an attapulgite-based composite material whose surface is modified by a functionalized ionic liquid. The composite material is a hydrophilic material.

[0044] The attapulgite composite material modified by the functionalized ionic liquid whose anion is chloride ion is ultrasonically dispersed in water, and a lithium bis(trifluoromethylsulfonyl)amide solution with a concentration of 0.5mol / L is added thereto, and the attapulgite / ionic liquid The composite material changes from hyd...

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Abstract

The invention discloses a method for preparing an attapulgite / ionic liquid composite material. The method utilizes ionic liquid molecules with a designable molecular structure to modify attapulgite and provides a novel approach for increasing the compatibility between the attapulgite and diverse organic solvents. The method bonds a functionalized ionic liquid containing a carboxyl functional group on the surface of the attapulgite through a covalent bond, and utilizes anion exchange to change hydrophilic and hydrophobic properties of the attapulgite. The preparation process and the preparation method are simple. The attapulgite composite material with controllable solubility and is modified by the ionic liquid is expected to be applied in the field of catalysis, sensors, novel nanometer materials, chemosynthesis, water treatment, food processing, mining, drug synthesis and so on.

Description

technical field [0001] The invention relates to a method for preparing an attapulgite / ionic liquid composite material, in particular to a method for obtaining a functional composite material by bonding functionalized ionic liquid molecules to the surface of the attapulgite. Background technique [0002] Attapulgite is a porous hydrated magnesium aluminum silicate with a fibrous structure. Jiangsu, Anhui, Gansu and other places in my country have extremely rich attapulgite mineral resources. The microstructure of attapulgite includes three levels: one is the basic structural unit of attapulgite - rod crystal, which belongs to one-dimensional nanomaterials. Rod crystals are needle-shaped, about 1-2 μm long, and about 10 nm in diameter. The second is a rod crystal bundle formed by close parallel aggregation of rod crystals. The third is various aggregates formed by the mutual aggregation of crystal beams. [0003] Due to the special fibrous structure, unusual colloid and ad...

Claims

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Application Information

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IPC IPC(8): C09C3/12C09C1/30
Inventor 于波刘刚王晓鹏刘维民
Owner YANTAI ZHONGKE RES INST OF ADVANCED MATERIALS & GREEN CHEM ENG
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