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Method for photocatalytic selective ester aminolysis of epoxy grease

An epoxy grease, a selective technology, applied in the field of polymers, can solve the problems of difficult degradation, poor mechanical properties, application limitations, etc.

Active Publication Date: 2020-07-24
SOUTHWEST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Epoxy resin is an important class of thermosetting resins. However, most epoxy resins come from non-renewable petroleum resources and have poor mechanical properties and are not easy to degrade, which limits their application.

Method used

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  • Method for photocatalytic selective ester aminolysis of epoxy grease
  • Method for photocatalytic selective ester aminolysis of epoxy grease
  • Method for photocatalytic selective ester aminolysis of epoxy grease

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Embodiment 1

[0032] This embodiment provides a method for preparing epoxy resin by selective ester aminolysis of photocatalytic epoxy grease, comprising: taking epoxy vegetable oil as raw material, adding imine and photocatalyst, and reacting under the irradiation of white LED lamp to obtain the target product, Its synthetic route is as follows image 3 shown. In the above reaction, the epoxidized soybean oil, ethanolamine, Ru(bpy) 3 2+ The molar ratio is (0.5~1.2):(0.4~0.6):(0.1~0.2).

[0033] In the above reaction, the reaction is carried out in a solvent-free, acid-base-free system.

[0034] In the above reaction, the reaction was carried out under the protection of an inert gas and irradiated continuously for 8 hours.

Embodiment 2

[0036] The present embodiment provides a kind of photocatalyzed method for selective ester aminolysis of epoxy grease, with epoxy ethyl linoleate (0.33g, 1.0mmol), ethanolamine (2.53g, 4.1mmol), Ru (bpy) 3 2+ (0.1mmol) was added to a dry 25mL round bottom flask, under the conditions of no solvent and no addition of acid and alkali, the reaction system was protected by an inert gas and continuously irradiated for 8h under a white LED lamp. During the reaction, thin layer chromatography (TLC ) to monitor the progress of the reaction.

[0037] Post-reaction treatment: monitor the reaction process in real time with a thin-layer chromatography plate. After 8 hours, the raw material ethyl epoxy linoleate basically reacts completely, and the reaction is stopped. Then the reaction solvent was poured into a 250mL separatory funnel, extracted with dichloromethane (3×10mL) and water (3×10mL), the lower organic phase was collected, dried over anhydrous magnesium sulfate, filtered and con...

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Abstract

The invention provides a method for photocatalytic selective ester aminolysis of epoxy grease. The method comprises the following step: generating a target product under the conditions of imine and aphotocatalyst by taking epoxy vegetable oil as a raw material. Imine is added into a reaction system for further aminolysis of the raw material epoxidized vegetable oil under the conditions of no solvent and no acid-base addition, and a target product can be obtained under the photocatalysis condition. The reaction relates to preparation of epoxidized vegetable oil from natural vegetable oil, andthen other substances are synthesized from the epoxidized vegetable oil so that another novel way is explored for development and utilization of natural oil. The reaction can be suitable for a large amount of grease work, such as epoxidized soybean oil, epoxidized ethyl linoleate and other epoxidized vegetable oil, the product is single and the conversion efficiency is high.

Description

technical field [0001] The invention relates to the technical field of macromolecules, in particular to a photocatalyzed method for selective ester aminolysis of epoxy grease. Background technique [0002] Vegetable oil is a natural polymer compound composed of fatty acid and glycerol, which is widely distributed in nature. Grease is also widely used in biological materials, polymer materials, food, cosmetics, heavy industry raw materials and other fields. It has always been the main food application, and at the same time, it can also modify vegetable oil to improve material performance. But in recent years, more and more people are using these oils to produce biofuels and chemical feedstocks. This is driven in part by rapidly rising oil prices, growing concerns about the environmental impact of using fossil oil, and the need to develop domestic renewable fuels and raw materials for industry. Vegetable oils can provide high-value renewable fatty acids for chemical and heal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/02
CPCC08G59/022
Inventor 周备杜官本杨盈盈陶云凤邓书端李想李海山李斗
Owner SOUTHWEST FORESTRY UNIVERSITY
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