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| Study on the Properties of Polylactic Acid Matrix Composites Reinforced by Different Waste Paper Fibers |
| Received:September 04, 2020 |
| DOI：10.11981/j.issn.1000-6842.2021.02.32 |
| Key Words:waste paper fibers;structural characteristic;composite material;mechanical property;interfacial compatibility |
| Fund Project:陕西省科技厅重点研发项目（2021SF-448）;陕西省教育厅重点科研计划项目（20JY051）。 |
| Author Name | Affiliation | Postcode | | DI Jingjing* | Faculty of Printing， Packaging and Digital Media， Xi'an University of Technology， Xi'an， Shaanxi Province， 710048 | 710048 | | ZHANG Xiaolin | Faculty of Printing， Packaging and Digital Media， Xi'an University of Technology， Xi'an， Shaanxi Province， 710048 | 710048 | | LI Shaoge | Faculty of Printing， Packaging and Digital Media， Xi'an University of Technology， Xi'an， Shaanxi Province， 710048 | 710048 | | DUAN Jingting | Faculty of Printing， Packaging and Digital Media， Xi'an University of Technology， Xi'an， Shaanxi Province， 710048 | 710048 | | LYU Jinyan | Faculty of Printing， Packaging and Digital Media， Xi'an University of Technology， Xi'an， Shaanxi Province， 710048 | 710048 | | WANG Yi | Faculty of Printing， Packaging and Digital Media， Xi'an University of Technology， Xi'an， Shaanxi Province， 710048 | 710048 | | ZHU Xiaofeng | Faculty of Printing， Packaging and Digital Media， Xi'an University of Technology， Xi'an， Shaanxi Province， 710048 | 710048 |
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| Abstract: |
| The surface morphology and structural characteristics of four kinds of waste paper （waste newspaper， waste cardboard， waste office paper， and waste book paper） fibers were studied by fiber analyzer， Fourier transform infrared spectrometer （FT-IR）， and scanning electron microscope （SEM）. Biodegradable composites of waste paper fiber/polylactic acid （PLA） were prepared by injection molding with PLA as the matrix and four kinds of waste paper fibers as the reinforcement. The results showed that the surfaces of waste newspaper fibers were seriously damaged， with many kinks and cross stripes. The fibers of waste cardboard and waste book paper were rather intact with less kinks and rough surface. The fibers of waste office paper had a higher length to diameter ratio， less fines content， and good morphology， but a relatively smooth surface. Furthermore， the interface compatibilities of waste newspaper/PLA and waste office paper/PLA composites were poor， and these two fibers had poor enhancement effect on the mechanical properties of PLA. The waste cardboard/PLA and waste book paper/PLA composites had good interfacial compatibility， and the fibers had certain load-bearing effect， which improved PLA's flexural and tensile properties. |
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