From science of Swiss federal material and technical lab (Empa) the message of newest scientific research that transmits concerned epoxy resin, what this lab is finishing epoxy resin is flame retardant function and mechanical intensity enhance a technology besides, return epoxy resin of research and development but repair, realized epoxy resin can reclaim to be used circularly.
Epoxy resin serves as the main colophony of coating, be applied at industrial coating and car coating domain, because its have better than emulsioni paint and alcoholic acid lacquer heat-resisting effect.
Epoxy resin is tough and the polymer data with extensive use. They and fibre glass or carbon fiber union are used, use at making the part of plane, car, train, shipping and wind- driven turbine for example. The material of annulus oxygen polymer that fiber enhances has exceedingly good machinery and hot property, and compare a metal get gently much. But, their weakness is to cannot reclaim, did not appear at present the epoxy resin material that can reclaim.
But, by Empa the Sabyasachi Gaan of advanced fiber lab is led now, empa researcher developed a kind of polymer material that is based on epoxy resin. This kind of material can reclaim completely, but repair and have anti-flammability, maintained epoxy resin at the same time good thermomechanical function. They are in " chemical project notes " on published positive result of this scientific research.
Reclaim epoxy resin is by no means easy thing, because epoxy resin is polymer of sex of a kind of hot solid, the polymer of this kind of type, polymer catenary is close together cross-linking, these chemical cross-linking make fuse become impossible. Once material is sclerotic, can no more have plastic.
And to thermoplastic polymer, for example PET or polyolefin, the circumstance is not such. Their polymer catenary leans very nearly, but join without chemistry between each other. When heat, these polymer can fuse and form new form. However, because lack cross-linking, they are inferior to heating up solid sex material normally in the mechanical function below high temperature.
The distinctive epoxy resin of Empa and international partner joint development is polymer of sex of a kind of hot solid on the technology, but with other heat solid sex colophony differs, it can resemble thermoplastic model is weighed like polymer. Its key is phosphine acerbity ester kind in a kind of very special function element is added in new colophony matrix. We synthesize “ at first this kind of element serves as fire retardant, wenyu Wu Klingler of scientist of the collective inventor of this technology, Empa says ” . However, the key that the polymer catenary of element and epoxy resin forms is dynamic, and be below certain condition can rupture. This loosened the cross-linking of polymer catenary, make them OK be fused and weigh model.
This kind of material, also be called vitrification polymer, at present this technology had appeared 10 years or so, be thought to have perspective particularly. “ nowadays, fiber enhances composite material to be able to reclaim far from, unless be below very abominable condition, the fiber that this meeting attaint reclaims, ”Wenyu Wu Klingler explains. “ once they reach service life, can be burned or fill in rubbish bury a processing. Had this kind of technology, they will be entered afresh first likely current. ”
“ we wish to what did not come scene, sabyasachi Gaan of ” group group leader complements, “ is a kind of composite material, fiber and colophony matrix can depart completely and repeat among them use. ” researcher is special the opportunity that saw carbon fiber enhances annulus oxygen, because they are used at plane, train, ship, car, bicycle normally,wait make. His explanation says: The production of “ carbon fiber needs many energy resources, release many carbon dioxide. ” . “ if we can reclaim them, their environmental footmark will be good much, the price also is met low much. ” in addition, reclaim with base material polymer (for example epoxy resin) the valuable element such as conjoint phosphor also is a likelihood.
Fiber enhances the exclusive application that composite material is not this kind of new-style polymer. For example, it can be used at producing coating of oxygen of wooden floor annulus, as a kind transparent, anticorrosive coating, its have good flame retardation again, and can be used a few pressure and “ of quantity of heat cure ” nick and dent.
Gaan explains: We do not have “ to issue the data of a kind of specific utility, opened kit of a function however. Anti-flammability, can reclaim gender and reparability are established. We can optimize all and other property according to expecting use. ” for example, he says, the production that character of going from place to place enhances oxygen of tall be surrounded by mountains to fiber is attached most importance to especially should, and outdoors lumber coating should be had be able to bear or endure await a gender, new-style epoxy resin is OK and custom-built come true.
To seek these and the other application of this kind of material, researcher is seeking industrial partner now. Empa values the commercial opportunity of this material, besides all other and favorable performance, polymer of modified annulus oxygen is cheap also and make easily.
