Light the fiber with qualitative, durable height enhances annulus oxygen composite material is comprised by the fibre glass in built-in polymer matrix or carbon fiber, it is the high-powered material with pair of production cars, shipping, plane and crucial lamina of wind- driven turbine.
To 2025, annual will reach its operation time limit by about 25000 tons wind report lamina. On the tradition, because the chemistry of epoxy resin is characteristic, lamina of wind- driven turbine reclaims very hard, because epoxy resin is a kind of stretch material, and be considered as a kind to be decomposed impossibly can duplicate use part. Epoxy resin cannot biology degradation, the meeting when burning releases toxic gas, bring about finally fill bury make the main way that handles them.
Because efficiency is low,mix cannot last, of lamina of wind- driven turbine fill bury already was prohibited by many Europe country, predict to later still can more country is carried out. Accordingly, politic to epoxy resin and its composite material reclaim feasibly demand is pressing.
At present the craft of new discovery is to reclaim politic notional test and verify, the blade of wind- driven turbine that can use at great majority to have and the blade that producing at present, with makings of base material of etc epoxy resin.
Specific for, researcher makes clear, through using ruthenium radical activator and alcohol of solvent different third and toluene, they can depart one of original construction unit that epoxy resin matrix releases annulus oxygen polymer, double phenolic A and complete fibre glass a single course.
However, this method still cannot expand instantly, because the efficiency of catalytic system can't undertake industrial executive —— and ruthenium is a kind rare and costly metal. Accordingly, the scientists of university of abstruse Hu Si are continueing to improve this kind of method.
“ nevertheless, we think this is the major breakthrough that develops durable technology, can think makings of annulus oxygen base material creates circular economy. This is chemical process publish first, can decompose epoxy resin composite material optionally and depart gives one of the most important data. Troels Skrydstrup says one of main authors of this research: The main component of polymer of “ annulus oxygen and glass or carbon fiber, won't damage in this process latter. ”
Troels Skrydstrup is university Chemstry Department mixes abstruse Hu Si interdisciplinary Namike learns a center (the professor of INANO) . This research got CETEC project (hot solid sex economy of loop of epoxy resin composite material) support, this project is the partner concern between institute of technology of company of Weisidasi, Ao Lin, Denmark and university of abstruse Hu Si.
A research is medium, the dehydrogenation that researcher used catalysis of a kind of Ru / key ruptures / reaction of reductive series connection, will rupture the commonnest C(alkyl in polymer) - O key, can use at disconnecting the C with adjacent of BPA matrix photograph (alkyl) - O single bond. Investigator revealed this kind of method to be in apply mediumly without modification amine solidify epoxy resin and commercial composite material, include the case of lamina of wind energy turbine. The result of investigator makes clear, it is feasible that to heating up solid sex epoxy resin and composite material undertake chemistry reclaims.
Solve compose experiment to prove to the catalysis of epoxy resin, catalysis reacts between 4 climate, but will reclaim the BPA quantity of 81% .
Through can be being used at the current method that element of amine solidify epoxy resin decomposes, student changes research to this agreement enhance annulus oxygen to fiber the sees form applicability of composite material, outside dividing polymer matrix, this composite material still contains the fiber of tall weight per cent. Below the case that does not make any pretreatment, after 3 days, composite material departs apparently inattentive fiber. Decantation reaction mixture; After catharsis, reclaimed the carbon fiber of 57wt% , and from inside solution depart gave the BPA of 13wt% .
Sequel checked the most advanced retire the crust of lamina of wind- driven turbine. After with composite material sample passes catalysis, this kind of business is decomposed thoroughly, get the BPA of the fibre glass of 50wt% and 19wt% .
Anyhow, to from discard as useless the constituent that reclaims in composite material, can consider to achieve circular economy. From reclaim the double phenolic A of gotten tall purity is theoretic can wait to already had production in epoxy resin, polycarbonate or polyester use again in catenary, replace the primitive BPA that produces from oil raw material. The catalytic process of investigator can be regarded as test and verify of a concept, the proof is valuable to these and economy of relevant material implementation loop is feasible.