| Autor: |
Lin, Huiping, Li, Ran, Li, Dehong, Huang, Zejie, Pang, Junwu, Zhang, Xinxiang, Liu, Weikai, Yang, Wenbin |
| Předmět: |
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| Zdroj: |
Cellulose; May2020, Vol. 27 Issue 7, p4053-4065, 13p |
| Abstrakt: |
The interfacial compatibility between wood and polymers of wood/plastic composite (WPC) has been widely investigated. However, the reported methods for improvement of interfacial compatibility almost utilized the compatibilizer. In this work, a compatibilizer-free method was applied to enhance the interfacial compatibility between wood flour (WF) and high-density polyethylene (HDPE). p-toluenesulfonic acid (p-TsOH) was used to selectively remove hemicelulose, which would significantly improve the hydrophobicity of WF. It was found that most hemicellulose (about 91%) and a small amount of lignin were solubilized from WF. The static water contact angle (WCA) of WF sheet was significantly increased from nearly 0° to 135.7°, indicating that the WF was converted from hydrophilic to hydrophobic. Scanning electron microscope (SEM) showed p-TsOH treatment of WF could effectively improve the interfacial bonding between the WF and HDPE. The composite with 50 wt% modified-WF (MWF) showed optimum mechanical properties with an increase of 33.5% and 38.7% in tensile strength and flexural strength, respectively, as compared to those of corresponding WF/HDPE composite. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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