Method for preparing functional hydrotalcite extremely easy to intercalate by adopting trihydroxymethyl molecules

A trimethylol, hydrotalcite technology, applied in chemical instruments and methods, dyed low molecular organic compound treatment, fibrous fillers, etc., can solve the problem of difficulty in inserting hydrotalcite between layers, and reduce the difficulty of ion exchange, Simplified synthesis method, reduced lattice energy effect

Inactive Publication Date: 2015-09-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to introduce a method for preparing easily intercalated hydrotalcites by using trimethylol molecules, which solves the problem that it is difficult to insert functional anions such as polyacids into the interlayers of hydrotalcites and needs nitrogen protection.

Method used

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  • Method for preparing functional hydrotalcite extremely easy to intercalate by adopting trihydroxymethyl molecules
  • Method for preparing functional hydrotalcite extremely easy to intercalate by adopting trihydroxymethyl molecules
  • Method for preparing functional hydrotalcite extremely easy to intercalate by adopting trihydroxymethyl molecules

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Experimental program
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Embodiment 1

[0018] a. Take 13.1mmol MgCl 2 ·6H 2 O, 6.9 mmol AlCl 3 ·6H 2 O mixed and dissolved in 100ml deionized water; 0.2mol trishydroxymethylaminomethane was dissolved in 100ml deionized water; the prepared two solutions were mixed and stirred for 30 minutes to obtain a colloidal solution, which was then transferred to an autoclave, and Aged at 80°C for 12 hours, then centrifuged and washed;

[0019] b. Disperse the precipitate obtained in step a in 100ml 0.5M NaCO 3 solution, stirred for 1 h, washed by centrifugation, and dried to obtain tris-modified hydrotalcite, which is denoted as Tris-NH 2 -CO 3 -LDH;

[0020] c. Take 2.436g Na 9 [A-PW 9 o 34 ]·7H 2 O was dissolved in 10ml of deionized water, completely dissolved, then added the hydrotalcite prepared in step b, stirred for 6 hours, washed by centrifugation for 2 times, and vacuum-dried to obtain polyacid Na 9 [A-PW 9 o 34 ]·7H 2 O intercalated hydrotalcite composites, abbreviated as Tris-NH 2 -A-PW 9 -LDH.

Embodiment 2

[0022] a. Take 13.1mmol MgCl 2 ·6H 2 O, 6.9 mmol AlCl 3 ·6H 2O mixed and dissolved in 100ml deionized water; 0.2mol 1,1,1-trimethylolethane was dissolved in 100ml deionized water; the prepared two solutions were mixed and stirred for 30 minutes to obtain a colloidal solution, and then transferred Put it in an autoclave, age at 80°C for 12h, and then centrifuge and wash;

[0023] b. Disperse the product obtained in step a in 100ml 0.5M NaCO 3 solution, stirred for 1 hour, washed by centrifugation, and dried to obtain 1,1,1-trimethylolethane-modified hydrotalcite, denoted as Tris-CH 3 -CO 3 -LDH;

[0024] c. Take 3.35g Na 9 [EuW 10 o 36 ]·32H 2 O was dissolved in 10ml of deionized water, completely dissolved, and the hydrotalcite prepared in step b was added to the polyacid solution, stirred for 6 hours, centrifugally washed twice, and vacuum-dried to obtain polyacid Na 9 [EuW 10 o 36 ]·32H 2 O intercalated hydrotalcite composites, abbreviated as Tris-CH 3 -EuW 1...

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Abstract

The invention discloses a method for preparing functional hydrotalcite extremely easy to intercalate by adopting trihydroxymethyl molecules, and belongs to the technical filed of preparation of inorganic composite materials. The method comprises the following steps: carrying out a hydrothermal reaction on a soluble divalent metal chloride, soluble trivalent metal chloride and trihydroxymethyl molecule mixed solution, dispersing the above obtained precipitate in a Na2CO3 solution, carrying out ion exchange, centrifuging, washing, and drying to obtain trihydroxymethyl molecule modified hydrotalcite; and adding the trihydroxymethyl molecule modified hydrotalcite to a functional anion solution, reacting while stirring without nitrogen protection, centrifuging, washing, and carrying out vacuum drying to obtain the functional anion intercalated hydrotalcite. The trihydroxymethyl molecules with a three-legged support structure are introduced in the hydrotalcite synthesis process, so the laminate dimension is controlled, the laminate crystal lattice energy is reduced, and the hydrotalcite interlayer ion exchange difficulty is reduced. The problems of large difficulty of insertion of polyacid and other functional anions into interlayer, and nitrogen protection needing are solved.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic composite materials, in particular to a method for preparing easily intercalated hydrotalcite by using trimethylol molecules. Background technique [0002] Hydrotalcite-like intercalation materials (LDHs) are a new type of nano-inorganic functional materials with a layered structure. Its structure is similar to that of brucite. The general composition formula can be expressed as: [M 2+ 1-x m 3+ x (OH) 2 ] x+ (A n- ) x / n mH 2 O, where M 2+ and M 3+ Respectively, divalent and trivalent metal cations in the laminate, such as: Mg 2+ 、Ni 2+ 、Co 2+ , Zn 2+ 、Cu 2+ and Al 3+ 、Cr 3+ , Fe 3+ 、Sc 3+ etc.; A n- is an interlayer anion, such as: CO 3 2- , NO 3 - , Cl - , OH - , SO 4 2- 、PO 4 3- 、C 6 h 4 (COO) 2 2- , heteropolyanions, etc.; x is M 3+ / (M 2+ +M 3+ ) molar ratio, its value is generally between 0.1 and 0.5; m is the number of interlayer water mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/08C09C3/06
Inventor 宋宇飞陈阳
Owner BEIJING UNIV OF CHEM TECH
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