Carbon fiber enhances epoxy resin composite material is one kind is the composite material that enhances material for fiber of matrix, charcoal with epoxy resin, its are had compare the characteristic such as intensity, low density, tall stiffness high, be generated electricity at aerospace, wind-force by wide application, the domain such as consolidate of a replacement of sporting goods, car, bridge. The rapid growth of carbon fiber and production of composite material of its epoxy resin and demand brings about year after year of its litter dimensions to rise. If do not adopt any reclaiming to handle measure, to 2050, carbon fiber enhances litter of epoxy resin composite material to reach accumulative total 983 thousand tons. Accordingly, urgent need exploration reclaims the method that charcoal fiber enhances epoxy resin composite material, include to reclaim costly charcoal fiber and matrix epoxy resin. And the three-dimensional network structure that the epoxy resin after solidify has high cross-linking, bring about these material not dissolve not frit, reclaim hard. Current, reclaim the method that charcoal fiber enhances epoxy resin composite material basically includes machinery to reclaim, heat treatment and chemistry reclaim 3 kinds big. Machinery reclaims is will useless old composite material the process of narrow measure, the composite material after smashing is used as fill or enhance material to enhance other data. But this kind of method cannot reclaim long fiber, and reclaim the value of the product is inferior. Heat treatment technology basically is centered in two kinds of types, namely fluid-bed technology and hot solution technology. Normally, heat treatment undertakes below high temperature environment, colophony cannot reclaim, and the meeting in handling a process produces toxic gas, be like CO, NOX, SOXEtc, pollute atmosphere environment badly. Chemistry reclaims is a kind of method that has perspective quite, in solvent (contain or do not contain activator) the epoxy resin degradation in lieutenant general composite material is monomer, oligomer or other material, reclaim to be worth charcoal fiber at high price. Recently, group of task of Hou Xianglin's researcher is in institute of chemistry of coal of Shanxi of the Chinese Academy of Sciences " new-style charcoal material (Chinese and English) " (the overview article that the problem published to be “Review Of Chemical Recycling And Reusing Of Carbon Fiber Reinforced Epoxy Resin Composites” on New Carbon Materials) , the research that summarized charcoal fiber to enhance chemistry of epoxy resin composite material to wind debit way mainly makes progress, basically include to exceed critical He Yalin solution of dissolvent of bound fluid, strong oxidation, alcoholysis, electrochemistry reclaims, the method such as catalytic degradation (graph 1) . In addition, reversible chemical bond is inserted to be hot solid sex in epoxy resin the loop of epoxy resin is used offerred an opportunity. Accordingly, brief still introducing but sex of recuperative heat solid the synthesis of epoxy resin and depolymerization mechanism. Finally, put forward chemistry to reclaim charcoal fiber enhances epoxy resin composite material and preparation high-powered can reclaim the development way with epoxy resin possible material.

China unsaturated polyester resin (UPR)
The catalytic degradation below gentle condition is considered as to reclaim the optimal solution that discards charcoal fiber enhances epoxy resin composite material, can reclaim already charcoal fiber, can obtain the chemical of high additional cost again. The group put forward to use zinc of high concentration chloridize / water catalysis system, pass key of alternative activation C-N, epoxy resin can charge sex of implementation hot solid of catalytic degradation reclaim. In aqueous solution of zinc of high concentration chloridize, match not completely the azotic atom action that the C-N in zincic ion and epoxy resin bolts, activation C-N bolts and rupture optionally. Discover at the same time, use 2 chloric firedamp or the dissolvent such as glacial second acid to heating up solid sex epoxy resin undertakes dissolve bilges pretreatment, can improve the degradation efficiency of epoxy resin significantly. Reclaim the property that charcoal fiber holds good (graph 2) . Circulate for many times the experiment makes clear need complement only right amount water and a few activator, effect of its catalysis degradation did not change apparently. Did not come to what charcoal fiber enhances epoxy resin composite material to reclaim, should maintain former charcoal fibrous not only mechanical function and length, the high cost that realizes matrix epoxy resin even is changed reclaim use, this will raise charcoal fiber to enhance the technical economy that epoxy resin composite material reclaims and commercial value greatly.
China unsaturated polyester resin (UPR)

Textual link: Http://xxtcl.sxicc.ac.cn/cn/article/doi/10.1016/S1872-5805(22)60652-8

2024
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