Photodegradation of wood flour/polypropylene composites incorporated with carbon materials with different morphologies |
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Authors: | Yao Peng Xiong Li Wen Wang |
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Institution: | 1. MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing, People’s Republic of China https://orcid.org/0000-0003-1746-2773;2. MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing, People’s Republic of China |
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Abstract: | ABSTRACTIn this study, wood flour/polypropylene (WF/PP) composites were prepared by incorporating 2?wt% carbon materials with different morphologies, including carbon black (CB), graphite (G), and multi-walled carbon nanotubes (CNTs). WF/PP composite without any additives was included as a reference. All composites were placed in the accelerated UV weathering tester for a total of 960 h. The physical and mechanical properties of composites were compared. The changes in surface morphology and surface chemistry were characterized by SEM AFM, and ATR-FTIR. The results showed that: (1) the addition of CNTs improved both flexural and impact properties of composites; (2) composites containing CNTs exhibited better color stability and less severe surface cracking during weathering; and (3) ATR-FTIR results revealed that all the additives alleviated surface photo-oxidation of composites due to their UV-screening effect. Overall, due to the improved interfacial bonding between WF and PP, CNTs were more effective in protecting wood–plastic composites from photodegradation. |
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Keywords: | Degradation surface photochemistry |
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