| Abstrakt: |
Poly(butylene adipate-co-terephthalate) (PBAT) is one of the most suitable aliphatic–aromatic co-polyesters to replace traditional plastics due to its excellent properties and biodegradability. However, the relatively low mechanical properties limit its large-scale application. Nanocellulose has been attempted to be chemically modified and used to enhance PBAT, but few significant results have been achieved. In this study, three octadecylamine-modified carboxyethyl cellulose microfibrils (OC-CMFs) with different degrees of substitution (DS) were successfully prepared and used to enhance PBAT. The microstructure, chemical structure, hydrophobicity, and thermal stability of the prepared OC-CMFs, as well as the mechanical properties, microstructure, and thermal properties of the OC-CMFs/PBAT composites were characterized. The results show that OC-CMFs have high hydrophobicity, with a water contact angle of up to 132.2°, making them highly dispersed and compatible in the PBAT matrix. When 0.5 wt% OC-CMF with a DS of 0.22 was added, the tensile strength of PBAT increased by 47.8%, while the elongation at break significantly increased by 49.0%. The significant improvement in the PBAT's mechanical properties will help expand its application range and further promote its substitution for non-biodegradable plastics. [ABSTRACT FROM AUTHOR] |
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