Abstract:

Aiming at improving the additional value of traditional wood plastic materials， a novel type of luminescent wood plastic composites （WPC） was prepared by a combination of alkaline earth aluminate and conventional WPC. Such a combination not only endowed the material with special properties， but also solved the problems such as poor weather resistance and the easy hydrolysis of alkaline earth aluminate. The mechanical and luminescent properties of the luminescent WPC were investigated. The relationship between the internal bonding and the luminescent properties was analyzed by scanning electron microscopy and steady?state fluorescence spectroscopy. The results indicated that the optimum technological parameters of the luminescent WPC were determined to be a PP content of 70 wt%， a residual material ratio of 1∶1.5， a coupling agent content of 1.5 %， and a hot pressing time of 10 min. The WPC achieved the maximum tensile strength of 22.2 MPa and impact strength of 12.55 kJ/m². The luminescent WPC presented an optimal excitation region of 380~450 nm， which completely coverd the optimal excitation band of 400~440 nm from the luminescent salts. This indicates that the luminescent WPC had a wide excitation band and a wide application range. Luminescent salts can effectively emit light in the interior of the luminescent WPC， and there is no chemical effect on alkaline earth aluminate in the processing procedure.

Key words: wood plastic composite, luminescence performance, alkaline earth aluminate