Thermosetting epoxy resin under microwave condition and degradation method of composite material of thermosetting epoxy resin in ionic liquid

Abstract

The invention relates to thermosetting epoxy resin under the microwave condition and a degradation method of a composite material of the thermosetting epoxy resin in an ionic liquid, and belongs to the field of microwave irradiation technology and resource utilization of waste resin materials. Imidazole salt, pyridine salt, piperidine salt or quaternary ammonium salt ionic liquid is adopted as a reaction medium, and the reaction conditions are moderate. By a microwave heating method, the energy consumption for the degradation reaction is reduced, the degradation reaction time is shortened, and degradation products generate more bisphenol A monomers; the used ionic liquid can be recycled; and the method provides help for recycling of waste circuit boards and 'energy saving and emission reduction' industrialization.

Description

technical field [0001] The invention relates to a method for degrading thermosetting epoxy resin and its composite material in ionic liquid under microwave conditions, and belongs to the technical fields of microwave irradiation technology, recycling of waste resin materials, treatment of industrial waste and resource utilization. Background technique [0002] Synthetic resin has the advantages of light weight, convenient processing, durability, insulation, etc., and its application fields have far surpassed traditional materials such as steel, wood, and cement. While people enjoy the convenience brought by the extensive use of synthetic resins, waste plastic products are also putting great pressure on the environment. Printed circuit boards are a typical type of thermosetting resin composite materials, and their composition is mainly thermosetting epoxy resin. At present, more than 500,000 tons of waste circuit boards need to be processed in China every year. The metal mat...

AI Technical Summary

Problems solved by technology

The landfill method does not require pretreatment, and the cost is low, but the resin remains in the soil for a long time and is not easy to decompose, and the harmful substances in the plastic are likely to cause secondary pollution. The landfill method not only pollutes the land, but also wastes a lot of recyclable resources. Therefore, reasonable recycling of waste printed circuit boards can not only reduce the deteriorating environmental problems, but also an important measure to alleviate the shortage of resources.

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