Method for preparing polycarboxylic acid / methyl-cyclopentadienyl-manganese-tricarbony (MMT) nanocomposites by adoption of atom transfer radical polymerization (ATRP) technique

A nano-composite material and polycarboxylic acid technology, applied in the field of preparing nano-composite materials, can solve the problems of wide molecular weight distribution, uncontrollable molecular weight, difficulty in obtaining a single intercalated polycarboxylic acid/MMT nano-composite material, etc., and achieve a regular structure. , the effect of stable performance

Inactive Publication Date: 2013-04-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the polycarboxylate / MMT nanocomposite prepared by conventional free radical polymerization is a mixed product with a wide molecular weight distribution and uncontrollable molecular weight, it is difficult to obtain a single intercalated polycarboxylate / MMT nanocomposite with a regular structure. materials or exfoliated polycarboxylate / MMT nanocomposites [Laetitia Urbanczyk, Fred Ngoundjo, Michael Alexandre, Christine Christophe Detrembleur, Cédric Calberg. European Polymer Journal, 2009,45(3):643-648]

Method used

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  • Method for preparing polycarboxylic acid / methyl-cyclopentadienyl-manganese-tricarbony (MMT) nanocomposites by adoption of atom transfer radical polymerization (ATRP) technique

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1) Dissolve 10g of 4-pentenoic acid in 20g of distilled water, then use NaOH aqueous solution to adjust the pH value of the obtained 4-pentenoic acid aqueous solution to 9, and transfer it to a reaction flask; then add 4-pentenoic acid aqueous solution Add 0.100g of organically modified montmorillonite (OMMT), 0.100g of cuprous chloride and 0.300g of 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclic Tetradecane (Me4cyclam), then the reaction flask where the reaction system obtained is evacuated to make the reaction flask in a vacuum state, and then nitrogen is passed into the container where the reaction system is located, so that the reaction system is in an oxygen-free environment; Under the protection of nitrogen, the reaction system was heated to 60°C in a water bath and stirred for 12 hours to obtain a poly-4-pentenoic acid sodium / MMT nanocomposite solution; wherein, the organically modified montmorillonite (OMMT) was obtained by using It was obtained by modifying montm...

Embodiment 2

[0025] 1) Dissolve 10g of methacrylic acid in 20g of distilled water, then use solid NaOH to adjust the pH value of the obtained methacrylic acid aqueous solution to 8.6, and transfer it into a reaction bottle; then add 0.025g of organic Modified montmorillonite (OMMT), 0.025g of cuprous bromide and 0.075g of 2,2'-bipyridyl (Bpy), and then vacuumize the reaction flask where the obtained reaction system is located, so that the inside of the reaction flask is In a vacuum state, argon gas is introduced into the container where the reaction system is located, so that the reaction system is in an oxygen-free environment; under the protection of argon gas, the reaction system is heated to 60°C in a water bath, and the reaction is stirred for 12 hours to obtain the polymer Sodium methacrylate / MMT nanocomposite solution; wherein, organically modified montmorillonite (OMMT) is obtained by modifying montmorillonite (MMT) with commercially available 2-bromoethyltrimethylammonium bromide. ...

Embodiment 3

[0028] 1) Dissolve 10g of trans-2-hexenoic acid in 20g of distilled water, then use NaOH aqueous solution to adjust the pH value of the obtained trans-2-hexenoic acid solution to 8.5, and transfer it to the reaction flask; 0.025 g of organically modified montmorillonite (OMMT), 0.025 g of cuprous bromide and 0.075 g of tris-(N,N-dimethylaminoethyl)amine (Me 6 TREN), then the reaction flask where the obtained reaction system is located is evacuated to make the reaction flask in a vacuum state, and then nitrogen is passed into the container where the reaction system is located, so that the reaction system is in an oxygen-free environment; under the protection of nitrogen , using a water bath to heat the reaction system to 60°C and then stir and react for 12 hours to obtain a polytrans-2-hexenosodium / MMT nanocomposite solution; wherein, the organically modified montmorillonite (OMMT) is commercially available It is obtained by modifying montmorillonite (MMT) with 2-bromoethyltrim...

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Abstract

The invention provides a method for preparing polycarboxylic acid / methyl-cyclopentadienyl-manganese-tricarbony (MMT) nanocomposites by the adoption of atom transfer radical polymerization (ATRP) technique. Firstly, NaOH is adopted to regulate the potential of hydrogen (pH) value of a water-soluble olefine acid class monomer water solution to 8.5-9, then organic modification montmorillonite, cuprous halide catalysts and catalyst ligand are added into the water-soluble olefine acid class monomer water solution, again, under the protection of nitrogen or inert gases, a reaction system is heated through water bath to 60-90 DEG C to undergo a stirring reaction for 12-24 hours, and a polycarboxylic acid / MMT nanocomposite solution is obtained. Ion exchange of the polycarboxylic acid / MMT nanocomposite solution is carried out through a strong acid-stage cation exchange column, liquid is collected and dried, and the polycarboxylic acid / MMT nanocomposites are obtained. The prepared polycarboxylic acid / MMT nanocomposites are narrow in molecular weight distribution, orderly and uniform in structure, stable in performance, and capable of achieving construction of single intercalation type nanocomposites or exfoliation type nanocomposites.

Description

technical field [0001] The invention relates to a method for preparing nanocomposite materials, in particular to a method for preparing polycarboxylic acid / MMT nanocomposite materials by using ATRP technology. Background technique [0002] Because of having more carboxylic acid groups, polycarboxylate / MMT nanocomposites not only have the general properties of polymer / MMT nanocomposites, but also have many other functions, such as being used for leather tanning, cell adhesion, etc. Accompanying growth [Nripen Singh, Xiaofeng Cui, Thomas Boland, Scott M. Husson. Biomaterials, 2007, 28:763–771], immobilization of biological macromolecules [Sean P. Cullen, Xiaosong Liu, Ian C. Mandel, Franz J .Himpsel, Padma Gopalan.Langmuir, 2008,24:913–920], Synthesis of shell crosslinked micelles [V Bütün, A B Lowe, N C Billingham, S P Armes.Journal of American Chemistry Society, 1999,121:4288– 4289], encapsulation of nanoparticles and catalysts [Jian Xu, Dibakar Bhattacharyya. Industrial & ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F20/06C08F20/04C08F2/44C08F8/00C08K9/04C08K3/34C08L33/02
Inventor 鲍艳姚小钊马建中
Owner SHAANXI UNIV OF SCI & TECH
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