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Metal organic framework-calcium carbonate composite crystal material and preparation method thereof

A metal-organic framework and composite crystal technology, applied in the field of nanocomposite materials, can solve problems such as interface incompatibility, and achieve the effect of improving thermal stability and alkali stability

Active Publication Date: 2021-10-01
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a metal-organic framework-calcium carbonate composite crystal material and a preparation method thereof. In the composite crystal material, the metal-organic framework can be uniformly embedded in the inorganic calcium carbonate crystal, which solves the problem of the current metal-organic framework and calcium carbonate Calcium suffers from interfacial incompatibility, providing a new method for embedding metal-organic frameworks inside inorganic calcium carbonate crystals

Method used

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  • Metal organic framework-calcium carbonate composite crystal material and preparation method thereof
  • Metal organic framework-calcium carbonate composite crystal material and preparation method thereof
  • Metal organic framework-calcium carbonate composite crystal material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0050] 0.204g ZrCl 4 Dissolved in 100mL DMF (N,N-dimethylformamide) solvent, 0.29g NH 2 -BDC (2-aminoterephthalic acid) was dissolved in 100mL DMF (N,N-dimethylformamide) solvent, then the two were mixed and 24mL glacial acetic acid was added, reacted in an oil bath at 120°C for 3h, and then Metal-organic frameworks (UiO-66-NH 2 ) crystal particles, the metal organic framework (UiO-66-NH 2 ) transmission electron microscope image of crystal particles figure 1 , the metal-organic framework (UiO-66-NH 2 ) The size (diameter) distribution of crystal particles is as follows figure 2 , it can be seen that the metal organic framework (UiO-66-NH 2 ) The diameter of the crystal particles is between 100-800nm;

[0051] Then, take 0.5g UiO-66-NH 2 , disperse it in 80mL DMF solvent, then add 0.448g of chain transfer agent CPCP (4-cyano-4-(phenylthioformylthio)pentanoic acid), 0.238g of HOBt (1-hydroxy Benzotriazole) and 0.368g of EDC (1-(3-dimethylaminopropyl)-3-ethylcarbodiimid...

Embodiment 2

[0055] 0.15g ZrCl 4 Dissolved in 100mL DMF (N,N-dimethylformamide) solvent, 0.35gNH 2 -BDC (2-aminoterephthalic acid) was dissolved in 100mL DMF (N,N-dimethylformamide) solvent, then the two were mixed and 20mL formic acid was added, reacted in an oil bath at 80°C for 2h, and then used DMF (N,N-dimethylformamide) was centrifuged to obtain a metal-organic framework (UiO-66-NH 2 ) crystal particles;

[0056] Then, take 0.0625g UiO-66-NH 2 , disperse it in 10mL DMF solvent, then add 0.056g of chain transfer agent CPCP (4-cyano-4-(phenylthioformylthio)pentanoic acid), 0.02976g of HOBt (1-hydroxy Benzotriazole) and 0.046g of EDC (1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride), then reacted in an oil bath at 100°C for 24h, after the reaction was completed UiO-66-NH surface modified by chain transfer agent was obtained by centrifuging with methanol at 3000rpm 2 crystal particles; then, UiO-66-NH modified by chain transfer agent 2 Disperse crystal particles into 10...

Embodiment 3

[0059] 0.25g ZrCl 4 Dissolved in 100mL DMF (N,N-dimethylformamide) solvent, 0.25gNH 2 -BDC (2-aminoterephthalic acid) was dissolved in 100mL of methanol solvent, then the two were mixed and 30mL of triethylamine was added, reacted in an oil bath at 30°C for 4h, and then centrifuged with methanol solvent to obtain a metal organic framework (UiO -66-NH 2 ) crystal particles;

[0060] Then, take 0.0625g UiO-66-NH 2 , disperse it in 10mL of methanol solvent, then add 0.112g of chain transfer agent CPCP (4-cyano-4-(phenylthioformylthio)pentanoic acid), 60mg0.06g of HOBt (1- Hydroxybenzotriazole) and 92mg0.092g of EDC (1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride), then reacted in an oil bath at 120°C for 24h, and the reaction After completion, use methanol to centrifuge at 3500rpm to obtain UiO-66-NH surface modified by chain transfer agent 2 crystal particles; then, UiO-66-NH modified by chain transfer agent 2 Disperse the crystal particles into 10mL of methan...

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Abstract

The invention discloses a metal organic framework-calcium carbonate composite crystal material and a preparation method thereof, and belongs to the technical field of nano composite materials. The metal organic framework-calcium carbonate composite crystal material can be obtained by performing polymer modification on the surfaces of metal organic framework crystal particles, then adding the metal organic framework crystal particles into a calcium chloride aqueous solution and synthesizing calcium carbonate crystals by using an ammonia diffusion method. In the composite crystal material, the metal organic framework particles can be uniformly embedded in the inorganic calcium carbonate crystal, so that the thermal stability and alkali stability of the composite crystal material are greatly improved, and the composite crystal material has important application value in the technical fields of catalysis, printing ink, coatings, proton conduction and biological medicines.

Description

technical field [0001] The invention relates to a metal organic framework-calcium carbonate composite crystal material and a preparation method thereof, belonging to the technical field of nanocomposite materials. Background technique [0002] Calcium carbonate is a mineral rich in content. As a high-quality filler and white pigment, it has the characteristics of low cost, excellent performance, non-toxic and tasteless, and is widely used in rubber, plastic, paper, ink, paint, sealants and adhesives, medicine, toothpaste and food and other fields. However, calcium carbonate also has shortcomings. It has the characteristics of high surface energy, easy agglomeration, hydrophilic and oleophobic surface, and strong polarity. It has weak binding force with the base material and easily causes surface and interface collapse. [0003] Metal-organic frameworks (MOFs) are a class of crystalline porous materials composed of organic ligands and metal ions (or clusters), which have the...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/06C08F230/02C08F220/38C08G83/00C08L51/08C08K3/26
CPCC08F283/00C08G83/008C08K3/26C08K2003/265C08L2201/08C08F220/06C08F230/02C08F220/382C08L51/08
Inventor 宁印刘梓晴宁国宏李丹
Owner JINAN UNIVERSITY
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