Novel efficient chelate antioxidant as well as preparation method and application thereof

A chelate and antioxidant technology, applied in the field of new and efficient chelate antioxidants and their preparation, can solve the problems of unsatisfactory compatibility, stable efficiency and cost, easy precipitation and loss, and single mechanism and other problems, to achieve high-efficiency anti-aging effect, not easy to migrate, and good stability.

Active Publication Date: 2022-03-08
NO 59 RES INST OF CHINA ORDNANCE IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional small-molecule antioxidants generally have problems such as easy precipitation and loss, single function, and pollution. Improved anti-migration methods such as particle loading immobilization / intercalation, and macromolecularization are still not enough in terms of compatibility, stability, efficiency, and cost. Satisfactory; while the method using conventional inorganic particles has the problems of single mechanism (mainly barrier adsorption) and low efficiency

Method used

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  • Novel efficient chelate antioxidant as well as preparation method and application thereof
  • Novel efficient chelate antioxidant as well as preparation method and application thereof
  • Novel efficient chelate antioxidant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of polydopamine chelate:

[0036] Add 9.09 g of tris to 1500 ml of deionized water at a temperature of 60°C, stir and dissolve, then adjust the pH to 8.5 by adding hydrochloric acid dropwise to obtain a tris buffer with a pH of 8.5, and then Add 1.5g of dopamine hydrochloride, stir and dissolve, and after the dopamine hydrochloride is completely dissolved, a polydopamine solution is obtained;

[0037] Add 4.15 g of nickel sulfate hexahydrate into the polydopamine solution, keep the temperature at 60°C, and stir for 12 hours. After the reaction was completed, a mixed solution was obtained;

[0038] The mixed solution was subjected to suction filtration, and the precipitate obtained by suction filtration was dispersed in 1500mL distilled water for cleaning, and then suction filtration was performed again, and the cleaning and suction filtration process was repeated 3 times to obtain a black solid product, ensuring that the unreacted dopamine monomer and othe...

Embodiment 2

[0042] Preparation of polydopamine chelate:

[0043] Add 9.09 g of tris to 1500 ml of deionized water at a temperature of 60°C, stir and dissolve, then adjust the pH to 8.5 by adding hydrochloric acid dropwise to obtain a tris buffer with a pH of 8.5, and then Add 1.5g of dopamine hydrochloride, stir and dissolve, and after the dopamine hydrochloride is completely dissolved, a polydopamine solution is obtained;

[0044] Add 2.075 g of nickel sulfate hexahydrate into the polydopamine solution, keep the temperature at 70°C, and stir for 8 hours. After the reaction was completed, a mixed solution was obtained;

[0045] The mixed solution was subjected to suction filtration, and the precipitate obtained by suction filtration was dispersed in 1500mL distilled water for cleaning, and then suction filtration was performed again, and the cleaning and suction filtration process was repeated 3 times to obtain a black solid product, ensuring that the unreacted dopamine monomer and othe...

Embodiment 3

[0049] Preparation of polydopamine:

[0050] Add 9.09g of Tris to 1500ml of deionized water at 60°C, stir to dissolve, adjust the pH to 8.5 by adding hydrochloric acid dropwise, add 1.5g of dopamine hydrochloride, keep the temperature at 60°C, and stir for 12 hours. After the reaction was completed, the reaction solution was subjected to suction filtration, and then the black solid obtained by suction filtration was redispersed in 1500 mL of distilled water, and suction filtration was performed again. This process was repeated 3 times to ensure that unreacted dopamine monomer and other impurities were washed away. Finally, the washed black solid was dried in a vacuum oven at 60° C. for 24 hours to obtain the final product polydopamine.

[0051] Application of polydopamine in polypropylene:

[0052] 38 g of polypropylene and 190 mg of polydopamine were melt-blended at 50 rpm and 180° C. for 10 min with an internal mixer to prepare a polypropylene / polydopamine composite materia...

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Abstract

The invention discloses a novel efficient chelate antioxidant as well as a preparation method and application thereof, dopamine hydrochloride, sulfate hydrate and a buffer agent are taken as main raw materials, and the specific preparation method comprises the following steps: in a buffer solution, adding a catalyst, the polydopamine chelate antioxidant is prepared through oxidative auto-polymerization of dopamine and chelation reaction of polydopamine and sulfate hydrate. The polydopamine chelate antioxidant is of a macromolecular polymer structure, is not easy to migrate, is well dispersed in a non-polar polyolefin matrix, has an efficient thermal oxidation stabilization effect on a polyolefin material, is simple in synthesis method and has large-scale production potential.

Description

technical field [0001] The invention belongs to the technical field of polymer material antioxidants, and in particular relates to a novel high-efficiency chelate antioxidant and its preparation method and application. Background technique [0002] Under the action of heat, oxygen, light, mechanical stress and other factors during the processing and service of the polymer and its own residual catalyst metal ions, the weak bonds or structural defects such as unsaturated double bonds and tertiary hydrogen in the polymer chain will cause Macromolecular reactions such as chain scission and crosslinking lead to material performance degradation. [0003] As far as the most important thermal oxygen and photooxidative aging of polymer materials are concerned, the current mainstream prevention methods include: (1) using chain-terminated antioxidants such as hindered phenols, aromatic secondary amines, and hindered amines to eliminate photooxidative / thermal aging R , RO , ROO , HO an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C08L23/12C08L79/04
CPCC08G73/0672C08L23/12C08L2201/08C08L79/04Y02A40/90
Inventor 刘世乡黄亚江李光宪赵方超胥泽奇王艳艳
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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