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PAMAM (polyamidoamine) dendrimer supported Schiff base compound as well as preparation method and application thereof

A technology of polymer loading and alkali compounds, applied in the preparation of imino compounds, chemical instruments and methods, applications, etc., can solve the problems of ineffective reduction of heavy metal content and large amount of adsorbents, and achieve safe use and high adsorption capacity. Large and strong adsorption effect

Active Publication Date: 2014-01-22
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the disadvantages of the existing technology for reducing the heavy metal content in cigarette smoke that the effect of reducing heavy metal content is not obvious and the amount of adsorbent used is large. Large polyamidoamine dendrimers loaded with Schiff base compounds

Method used

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  • PAMAM (polyamidoamine) dendrimer supported Schiff base compound as well as preparation method and application thereof
  • PAMAM (polyamidoamine) dendrimer supported Schiff base compound as well as preparation method and application thereof
  • PAMAM (polyamidoamine) dendrimer supported Schiff base compound as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] (1) Synthesis of the first generation (G1.0) polyamide-amine dendrimer carrier

[0050] At 25°C, ethylenediamine (EDA) (1.202g, 20mmol) was used as the nucleus of the macromolecule, and methyl acrylate (MA) (6.887g, 80mmol) was reacted in 50mL methanol solution for 72h, and the solution was heated at 70 Rotary evaporation under reduced pressure at ℃, when the solvent is spin-dried, cool to room temperature, add methanol to the system to dissolve, and then perform rotary evaporation under reduced pressure at 70°C, repeat three times to obtain the product, vacuum-dry at 50°C to obtain The 0.5 generation (G0.5) macromolecule has four ester functional groups at the end of the macromolecule. G0.5 (4.042g, 40mmol of ester group) was dissolved in anhydrous methanol, and then EDA (2.4g, 40mmol) was added dropwise to the system reaction system, and the mixture was reacted at room temperature for 72h, and the solution was Perform reduced-pressure rotary evaporation at 70°C. When...

Embodiment 2

[0059] (1) Synthesis of the second generation (G2.0) polyamide-amine dendrimer carrier

[0060] At 25°C, the synthesized 1.0G dendrimer (2.580g, 20mmol of amine groups) was dissolved in anhydrous methanol, and then, methyl acrylate MA (3.440g, 40mmol) was added dropwise to the system , the mixture was reacted at room temperature for 72 hours. After the reaction, the solution was subjected to reduced-pressure rotary evaporation at 70°C. When the solvent evaporated to dryness, it was cooled to room temperature, methanol was added to the system to dissolve, and the reduced-pressure rotary evaporation was performed again at 70°C. ,repeat three times. Finally, the obtained product was vacuum-dried at 50 °C to obtain a 1.5-generation (G1.5) macromolecule. G1.5 (4.816g, 32mmol of ester group) was dissolved in anhydrous methanol, and then ethylenediamine (EDA) (1.92g, 32mmol) was added dropwise to the system, and the mixture was reacted at room temperature for 72h, After the reactio...

Embodiment 3

[0068] (1) Synthesis of the third generation (G3.0) polyamide-amine dendrimer carrier

[0069] At 25°C, 2.0 g of the synthesized dendrimer (2.856 g, 16 mmol of amine groups) was dissolved in anhydrous methanol, and then methyl acrylate (MA) (2.752 g, 32 mmol) was added dropwise to In the system, the mixture was reacted at room temperature for 72 hours. After the reaction, the solution was subjected to reduced-pressure rotary evaporation at 70°C. When the solvent was evaporated to dryness, cooled to room temperature, methanol was added to the system to dissolve, and the solution was rotated under reduced pressure at 70°C. Evaporate and repeat three times. Finally, the obtained product was vacuum-dried at 50 °C to obtain the 2.5 generation (G2.5) macromolecule. G2.5 (2.804g, 16mmol of ester group) was dissolved in anhydrous methanol, and then ethylenediamine (EDA) (0.96g, 16mmol) was added dropwise to the system, and the mixture was reacted at room temperature for 72h, After t...

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Abstract

The invention discloses a PAMAM dendrimer supported Schiff base compound as well as a preparation method and an application thereof. According to the preparation method, ethylenediamine is taken as a kernel, a Micheal addition reaction and an amidation of ester between the ethylenediamine and methyl acrylate are performed repeatedly to obtain a branch, and a Schiff base compound is grafted on the tail end of branch to obtain the PAMAM dendrimer supported Schiff base compound. The prepared PAMAM dendrimer supported Schiff base compound has the characteristics of large adsorption quantity and high adsorption capacity for heavy metal in smoke, the effect of reduction of the release amount of the heavy metal in main stream smoke of cigarettes can be effectively realized if a few compounds are added to cigarette filter sticks, and the compound is simple in preparation process and suitable for industrial production.

Description

technical field [0001] The invention relates to a polyamide-amine type dendritic polymer loaded Schiff base compound and its preparation method and application, belonging to the field of novel cigarette smoke heavy metal polymer adsorption materials. Background technique [0002] Tobacco and tobacco products contain lead (Pb), arsenic (As), cadmium (Cd), chromium (Cr), mercury (Hg) and other heavy metals. During cigarette smoking, heavy metals and their compounds may be inhaled into the human body in the form of smoke aerosols or metal oxides and are easily accumulated in the human body to cause harm [Chen, Q-H. et al., Studies of Trace Elements and Health , 2005, 22, 47-49]. Studies have shown that the blood cadmium concentration of smoking men is significantly higher than that of non-smokers [Xin Nan et al., China Medical Biotechnology, 2009,4(5):390]. Adding an appropriate amount of activated carbon during the processing and production of cigarette filters, the adsorpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C07C249/02C07C251/24B01J20/26B01J20/30A24D3/14
Inventor 银董红文建辉成乐为秦亮生黄嘉若
Owner CHINA TOBACCO HUNAN INDAL CORP
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