Ningbo green recycling composite materials

Chemical Database,Thermosetting resins and their composites is a kind of comprehensive performance of materials, widely used in aerospace, aviation, industrial, civil and other fields. But due to the formation of insoluble after the curing reaction of thermosetting resins do not melt of three dimensional network crosslinking structure, processing and recycling is very difficult. In recent years, with China's large aircraft, the development of emerging industries such as new energy, rail transportation, thermosetting resin matrix composite applications continue to expand, the problem of recycling is becoming more and more serious. Many research institutions at home and abroad have put forward the related subjects, to study the recycling issues. Currently reported methods often require tough conditions, and each method has its defects, and there is no one way to apply all recycling of composite materials, so we must find new solutions.

Aimed at the status quo, ningbo material technology and engineering of the Chinese academy of sciences institute of polymer and composite materials division in 2010 from the perspective of green environmental protection, put forward the study of the problem, and get the support of, director of the fund. After more than two years of effort, managed to find a kind of low temperature low pressure from accelerated recycling method, the compound solution in low toxicity low corrosion, by two-step carbon fiber/epoxy resin (CF/EP) composites efficient decomposition and recovery. Recently, through in-depth study and accelerate the decomposition mechanism has made new progress. The main reaction generated by reaction system of the two components and the third intermediates, the intermediates in decomposition can produce catalytic reaction under the condition of rapid reaction to the components, cleverly realizes the response acceleration. By controlling the conditions can be in the reaction temperature 70 ℃, reaction time is 0.5 h, more than 90% of the epoxy resin degradation, the strength of the recycled fibers can keep in the original fiber by more than 90%.