Synthesis of Polycaprolactone-Grafted Microfibrillated Cellulose for Use in Novel Bionanocomposites–Influence of the Graft Length on the Mechanical Properties
- 4 May 2011
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 3 (5), 1426-1433
- https://doi.org/10.1021/am2001828
Abstract
In the present work, microfibrillated cellulose (MFC) made from bleached sulfite softwood dissolving pulp was utilized to reinforce a poly(ε-caprolactone) (PCL) biopolymer matrix. To improve the dispersibility of the hydrophilic MFC in the nonpolar matrix and the interfacial adhesion in the composite material, we covalently grafted the MFC with PCL via ring-opening polymerization (ROP) of ε-caprolactone (ε-CL). To be able to investigate the effect of the PCL graft length on the mechanical properties of the composite material, we performed ROP to different molecular weights of the grafts. Bionanocomposites containing 0, 3, and 10 wt % MFC were prepared via hot pressing using both unmodified and PCL grafted MFC (MFC-g-PCL) as reinforcement. PCL grafting resulted in improved dispersion of the MFC in a nonpolar solvent and in the PCL matrix. The mechanical testing of the biocomposites showed an improvement in the mechanical properties for the PCL grafted MFC in comparison to ungrafted MFC. It was also shown that there was an impact on the mechanical properties with respect to the PCL graft lengths, and the strongest biocomposites were obtained after reinforcement with MFC grafted with the longest PCL graft length.Keywords
This publication has 27 references indexed in Scilit:
- Microfibrillated cellulose and new nanocomposite materials: a reviewCellulose, 2010
- A Novel Thermoformable Bionanocomposite Based on Cellulose Nanocrystal‐graft‐Poly(ε‐caprolactone)Macromolecular Materials and Engineering, 2009
- Cellulose Whiskers versus Microfibrils: Influence of the Nature of the Nanoparticle and its Surface Functionalization on the Thermal and Mechanical Properties of NanocompositesBiomacromolecules, 2008
- Enzymatic Hydrolysis Combined with Mechanical Shearing and High-Pressure Homogenization for Nanoscale Cellulose Fibrils and Strong GelsBiomacromolecules, 2007
- Review of Recent Research into Cellulosic Whiskers, Their Properties and Their Application in Nanocomposite FieldBiomacromolecules, 2005
- Modified Cellulose Fibers as Reinforcing Fillers for Macromolecular MatricesMacromolecular Symposia, 2005
- Polymer brushes: surface-immobilized macromoleculesProgress in Polymer Science, 2000
- Thermoplastics Reinforced with Wood Fillers: A Literature ReviewPolymer-Plastics Technology and Engineering, 1998
- Biofibers as reinforcing fillers in thermoplastic compositesJournal of Vinyl and Additive Technology, 1995
- Macromolecular physics, volume 3—crystal melting, Bernhard Wunderlich, Academic Press, New York, 1980, 363 pp. Price: $42.50Journal of Polymer Science Part C: Polymer Letters, 1980