期刊
INDUSTRIAL CROPS AND PRODUCTS
卷 197, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.indcrop.2023.116498
关键词
Lignin; Ester exchange systems; Vitrimer; Epoxy asphalt; Recycle
Researchers have successfully prepared a lignin-based epoxy asphalt (ELEA) with thermoplastic and thermosetting properties by introducing a lignin-based vitrimer system into the asphalt. ELEA shows good operability, thermal stability, and potential for recycling, in line with the trend towards the development of a circular economy.
Conventional epoxy asphalt is a thermosetting material that is difficult to reprocess and cannot be easily recycled after disposal. In this study, a lignin-based epoxy asphalt (ELEA) with thermoplastic and thermosetting properties was prepared by introducing a lignin-based vitrimer system, which has a dynamic, covalently bonded, cross-linked ester network, into the asphalt. The mechanical properties (tensile strength, 1.605 MPa; elongation at break, 382.38 %) also meet the requirements of epoxy asphalt for steel bridge deck pavement. The viscosity, thermal properties and high-temperature reversibility of ELEA show that ELEA has good operability, thermal stability and potential for recycling, in line with the trend towards the development of a circular economy. The use of biomass-based derivatives for the epoxy resin and curing agent in ELEA also reduces dependence on non-renewable petroleum resources and provides a useful reference for the high-value and efficient development and utilization of industrial lignin.
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