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

A technology of ionic liquid and epoxy resin, which is applied in the field of microwave irradiation technology and the recycling of waste resin materials, can solve the problems of waste of recyclable resources, land pollution, secondary pollution, etc., to reduce the degradation reaction time and improve environmental protection The effect of performance and easy recycling

Inactive Publication Date: 2013-04-17
SHANGHAI UNIV
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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.

Method used

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

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Embodiment Construction

[0016] The essence of the present invention will be further described below in conjunction with the accompanying drawings and examples, but the content of the present invention is not limited thereto.

[0017] The process and steps of the embodiment are as follows:

[0018] First, crush the thermosetting epoxy resin or its composite material into flakes or granules of a certain size, clean them, put them in an oven to dry at 60°C, and mix 2g of thermosetting epoxy resin granules and 10g of ionic liquid BmimBF 4 Mix and place in a flask, and make the epoxy resin powder completely submerged in the ionic liquid; turn on the microwave device and react for 20 minutes, take out the flask and place it in a ventilated place to cool rapidly; then dissolve the degraded mixture with methanol, and collect the washing liquid, Finally, the methanol solution of the liquid phase product is obtained; the methanol solution of the liquid phase product is subjected to vacuum distillation, and the...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/28C08J3/28C08L63/00
CPCY02W30/62
Inventor 张剑秋邓舞艳宋超田涛韩家龙
Owner SHANGHAI UNIV
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