Journal
CELLULOSE
Volume 20, Issue 6, Pages 2981-2989Publisher
SPRINGER
DOI: 10.1007/s10570-013-0073-6
Keywords
Cellulose nanofibrils; Reinforcement; PVA
Funding
- National Natural Science Foundation of China [51103073, 21277073]
- Scientific Research Foundation for Returned Overseas Chinese Scholars
- Natural Science Foundation of Jiangsu Province [BK2011828]
- Qing Lan Project of Jiangsu Province
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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A green method-joint mechanical grinding and high pressure homogenization-was used to defibrillate paper pulp into nanofibrils. The prepared cellulose nanofibrils (CNF) were then blended with PVA in an aqueous system to prepare transparent composite film. The size and morphology of the nanofibrils and their composites were observed, and the structure and properties were characterized. The results showed that CNFs are beneficial to improve the crystallinity, mechanical strength, Young's modulus, T (g) and thermal stability of the PVA matrix because of their high aspect ratio, crystallinity and good compatibility. Therefore, nano cellulosic fibrils were proven to be an effective reinforcing filler for the hydrophilic polymer matrix. Moreover, the green fabrication approaches will be helpful to build up biodegradable nanocomposites with wide applications in functional environmentally friendly materials.
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