Bio-composite fibers were developed from wood pulp and polypropylene (PP) by an extrusion process. The thermo-physical and mechanical properties of wood pulp-PP composite fibers, neat PP and wood pulp were studied using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). The thermal stability of bio-composite fibers was found to be significantly higher than pure wood pulp. An understanding into the melting behaviour of the composite system was obtained which would assist in selecting a suitable temperature profile for the extruder during processing. The visco-elastic properties of bio-composite fibers were also revealed from the study. The generated bio-composite fibers were also characterized using Fourier transform infrared spectroscopy (FTIR) to understand the nature of chemical interaction between wood pulp reinforcement and PP matrix. The use of maleated polypropylene (MAPP) as a compatibilizer was investigated in relation to the fiber microstructure. Changes in absorption peaks were observed in FTIR spectra of bio-composite fibers as compared to the pure wood pulp which indicated possible chemical linkages between the fiber and polymer matrix.
Sain M . Interface modification and mechanical properties of natural fiber-polyolefin composite products. J Reinf Plast Compos. 2005; 24: 121–30 .
Wang B Sain M . Isolation of nanofibers from soybean source and their reinforcing capability on synthetic polymers. Compos Sci Technol. 2007; 67: 2521–7 .
Oksman K Skrifvars M Selin JF . Natural fibers as reinforced in polylactic acid (PLA). Compos Sci Technol. 2003; 63: 1317–24 .
Saheb D Jog JP . Natural fiber polymer composites: a review. Adv Polym Sci. 1999; 18: 351–63 .
Hornsby PR Hinrichen E Tarverdi K . Preparation and properties of polypropylene composites reinforced with wheat and flax straw fibers: part II analysis of composite microstructure and mechanical properties. J Mater Sci. 1997; 32: 1009–15 .
Heijenrath R Peijs T . Natural fibre-mat-reinforced thermoplastic composites based on flax fibres and poplypropylene. Adv Compos Lett. 1996; 5: 81–5.
Mieck KP Nechwatal A Knobedorf C . Potential applications of natural fibres in composite materials. Melli Text. 1994; 11: 228–30 (in English).
D´ny´di L Renner K Szabó Z Nagy G Móczó J Puk´nszky B . Wood flour filled pp composites: adhesion, deformation, failure. Polym Adv Technol. 2006; 17: 967–74 .
Nachtigall S Cerveira G Rosa S . New polymeric-coupling agent for polypropylene/wood-flour composites. Polym Test. 2007; 26: 619–28 .
Dominkovics Z D´ny´di L Punk´nszky B . Surface modification of wood flour and its effect on the properties of pp/wood composites. Composites A. 2007; 38: 1893–901 .
Wambua P Ivens J Verpoest I . Natural fibres: can they replace glass in fibre reinforced plastics? Compos Sci Technol. 2003; 63: 1259–64 .
Herrera-Franco PJ Valadez-Gonzalez A . Mechanical properties of continuous natural-reinforced polymer composites. Composites A. 2004; 35: 339–45 .
Bouza R Marco C Ellis G Martin Z Gómez MA Barral L . Analysis of the isothermal crystallization of polypropylene/wood flour composites. J Therm Anal Calorim. 2008; 94: 119–27 .
Li Y Mai YW Ye L . Sisal fibre and its composites: a review of recent developments. Compos Sci Technol. 2000; 60: 2037–55 .
Hepwoth DG Hobson RN Bruce DM Farrent JW . The use of unretted hemp fibre in composite manufacture. Composites. 2000; A3: 1279–83.
Rozman HD Tan KW Kumar RN Abubakar A Ishak ZAM Ismail H . The effect of lignin as a compatibilizer on the physical properties of coconut fiber-polypropylene composites. Eur Polym J. 2000; 36: 1483–94 .
Douglas P Murphy WR McNally G Billham M . ANTEC. 2003; 2029–33.
Li TQ Ng CN Li RKY . Impact behavior of sawdust/recycled PP composites. J Appl Polym Sci. 2001; 81: 1420–8 .
Arbelaiz A Fern´ndez B Cantero G Liano-Ponto R Valea A Mondragon I . Mechanical properties of flax fibre/polypropylene composites: influence of fibre/matrix modification and glass fibre hybridization. Composites A. 2005; 36: 1637–44 .
Jain S Kumar R Jindal UC . Mechanical behaviour of bamboo and composite. J Mater Sci. 1992; 27: 4598–604 .
Aziz SH Ansell MP . The effect of alkalization and fibre alignment on the mechanical and thermal properties of kenaf and hemp bast fibre composites: part 1 - polyester resin matrix. Compos Sci Technol. 2004; 64: 1219–30 .
Glassar WG Razaina R Jain RK Kander R . Fibre-reinforced cellulosic thermoplastic composites. J Appl Polym Sci. 1999; 73: 1329–40 .
Bledzki AK Gassan J . Composite reinforced with cellulose based fibres. Prog Polym Sci. 1999; 24: 221–74 .
Causin V Marega C Saini R Marigo A Ferrara G . Crystallization behavior of isotactic polypropylene based nanocomposites. J Therm Anal Calorim. 2007; 90: 849–57 .
Moore EP . Polypropylene handbook. Hanser: Cincinnati; 1996.
Amash A Zugenmaier P . Study on cellulose and xylan filled polypropylene composites. Poly Bull. 1998; 40: 251–8 .
Mojumdar SC Sain M Prasad RC Sun L Venart JES . Selected thermoanalytical methods and their applications from medicine to construction. J Therm Anal Calorim. 2007; 90: 653–62 .
Ehrenstein GW Riedel G Trawiel P . Thermal analysis of plastics. Hanser: Cincinnati; 2004.
Dean JA . The analytical chemistry handbook. New York: McGraw Hill Inc.; 1995. p. 15.1–5.
Pungor E . A practical guide to instrument analysis. Florida: Boca Raton; 1995. p. 181–91.
Douglas S Hollar FJ Nieman T . Principles of instrumental analysis. 5th ed. McGraw-Hill: New York; 1998. p. 905.
Harper D Wolcott M . Interaction between coupling agent and lubricants in wood-polypropylene composites. Composites A. 2004; 35: 385–94 .
Wang Z Hsiao BS Srinivas S Brown GM Tsou AH Cheng SZ , et al. Phase transformation in quenched mesomorphic isotactic polypropylene. Polymer. 2001; 42: 7561–6 .
Qiu W Zhang F Endo T Hirotsu T . Effect of maleated poplypropylene on the performance of polypropylene/cellulose composite. Polym Compos. 2005; 26: 448–53 .
Proniewicz LM Paluszkiewicz C Bircz&ska AW Majcherezyk H Bara&ski A Konieczna A . FT-IR and FT-Raman study of hydrothermally degradated cellulose. J Mol Struct. 2001; 596: 163–9 .
Mwaikambo LY Ansell MP . Chemical modification of hemp, sisal, jute, and kapok fibers by alkalization. J Appl Polym Sci. 2002; 84: 2222–34 .
Luo X Benson RS Kit KM Dever M . Kudzu fiber-reinforcement polymer composites. J Appl Polym Sci. 2002; 85: 1961–9 .