New biocomposites based on bioplastic flax fibers and biodegradable polymers |
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| Authors: | Magdalena Wróbel‐Kwiatkowska Magdalena Czemplik Anna Kulma Magdalena Żuk Jacek Kaczmar Lucyna Dymińska Jerzy Hanuza Maciej Ptak Jan Szopa |
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| Institution: | 1. Len Pharma, Zamkowa 17, 82‐200 Malbork, Poland;2. Linum Foundation, Stab?owicka Wroc?aw, Poland;3. Faculty of Biotechnology, University of Wroc?aw, Przybyszewskiego 63/77, 51‐148, Wroc?aw, Poland;4. Laboratory of Polymers, Institute of Mechanical Engineering and Automation, Wroc?aw University of Technology, Wyb. Wyspiańskiego 27, 50‐370 Wroc?aw, Poland;5. Dept. of Bioorganic Chemistry, Institute of Chemistry and Food Technology, Faculty of Engineering and Economy, University of Economic, Komandorska 118/120, 53‐345 Wroc?aw, Poland;6. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50‐422 Wroc?aw, Poland |
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| Abstract: | A new generation of entirely biodegradable and bioactive composites with polylactic acid (PLA) or poly‐ε‐caprolactone (PCL) as the matrix and bioplastic flax fibers as reinforcement were analyzed. Bioplastic fibers contain polyhydroxybutyrate and were obtained from transgenic flax. Biochemical analysis of fibers revealed presence of several antioxidative compounds of hydrophilic (phenolics) and hydrophobic cannabidiol (CBD), lutein] nature, indicating their high antioxidant potential. The presence of CBD and lutein in flax fibers is reported for the first time. FTIR analysis showed intermolecular hydrogen bonds between the constituents in composite PLA+flax fibers which were not detected in PCL‐based composite. Mechanical analysis of prepared composites revealed improved stiffness and a decrease in tensile strength. The viability of human dermal fibroblasts on the surface of composites made of PLA and transgenic flax fibers was the same as for cells cultured without composites and only slightly lower (to 9%) for PCL‐based composites. The amount of platelets and Escherichia coli cells aggregated on the surface of the PLA based composites was significantly lower than for pure polymer. Thus, composites made of PLA and transgenic flax fibers seem to have bacteriostatic, platelet anti‐aggregated, and non‐cytotoxic effect. © 2012 American Institute of Chemical Engineers Biotechnol. Prog., 2012 |
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| Keywords: | transgenic flax fibers mechanical properties FTIR analysis |
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