Abstract
Wood polymer composite is an important material class for industries. Microbiological properties can be an important aspect to enlarge its application base. The biocidal properties of wood polymer composite (WPC) can be aggregated by incorporation of biocidal additives on its composition. But, an important aspect is the evaluation the influence of the fabrication process on its biocidal properties. In particular, the temperature and screw velocity are important parameters for extrusion processes, and the mass proportions of the compounds are important factors to define the WPC properties. Different combinations of process conditions and mass proportions of the composite can promote variation in the magnitude of the bactericidal effect. The bactericidal properties are aggregated in the composite by organic bactericidal additive and the high temperature and high shear rate during the extrusion process can affect the effectiveness of the bactericidal additive function. This paper investigates the effects of the extrusion process parameters associated with different percentages of bactericidal additives on the WPC. The results showed significant effects on the bactericidal properties that depended only on the bactericidal content.
References
Balasurya, P. W., et al., “Mechanical Properties of Wood Flake – Polyethylene Composites. Part I: Effect of Processing Methods and Matrix Melt Flow Behavior”. Composites Part A, 32, 619–629(2001) DOI: 10.1016/S1359-835X(00)00160-3Search in Google Scholar
Bhattacharyya, D., et al., “Thermoforming Wood Fibre-Polypropylene Composite Sheets”. Compos. Sci. Technol., 63, 353–365(2003) DOI: 10.1016/S0266-3538(02)00214-2Search in Google Scholar
Byskov, E., et al., “Kinkband Formation in Wood and Fiber Composites – Morphology and Analysis”. Int. J. Solids Struc., 39, 3649–3673(2002) DOI: 10.1016/S0020-7683(02)00174-9Search in Google Scholar
Coutinho, F. M. B., Costa, T. H. S., “Performance of Polypropylene – Wood Fiber Composites”. Polym. Test., 18, 581–587(1999) DOI: 10.1016/S0142-9418(98)00056-7Search in Google Scholar
Denyer, S. P., Maillard, J. Y., “Cellular Impermeability and Uptake of Biocides and Antibiotics in Gram-negative Bacteria”, J. Appl. Microbiol., 92, 35–45(2002). DOI: 10.1046/j.1365-2672.92.5s1.19.xSearch in Google Scholar
Elvy, S. B., et al., “Effects of Coupling Agents on the Physical Properties of Wood – Polymer Composites”. J. Mater. Process. Technol., 48, 365–372(1995) DOI: 10.1016/0924-0136(94)01670-VSearch in Google Scholar
Fiori, M. A., et al., “Effect of the Temperature in the Antimicrobial Action of the Bactericidal Wood Polymer Composite – BWPC”, Mater. Sci. Forum, 591–593, 362–367(2008a) DOI: 10.4028/www.scientific.net/MSF.591-593.362Search in Google Scholar
Fiori, M. A., et al., “Bactericide Effect of Powder Glasses Submitted to Na+/Ag+ Ionic Exchange in Ionic Media Containing Different Concentration of AgNO3”. Mater. Sci. Forum, 591–593, 849–85(2008b) DOI: 10.4028/www.scientific.net/MSF.591-593.849Search in Google Scholar
Geoge, B., et al., “Photodegradation and Photostabilisation of Wood – The State of the Art”. Polym. Degrad. Stab., 88, 268–274(2005) DOI: 10.1016/j.polymdegradstab.2004.10.018Search in Google Scholar
Gupta, B. S., et al., “Surface Properties and Adhesion of Wood Fiber Reinforced Thermoplastic Composites”. Colloids Surf., A, 302(1–3), 388–395(2007) DOI: 10.1016/j.colsurfa.2007.03.002Search in Google Scholar
Ichazo, M. N., et al., “Polypropylene/Wood Flour Composites: Treatments and Properties”. Compos. Struc., 54, 207–214(2001) DOI: 10.1016/S0263-8223(01)00089-7Search in Google Scholar
Laurent, M. M., et al., “Photoaging and Stabilization of Rigid PVC/Wood-Fiber Composites”. J. Appl. Polym. Sci., 80, 1943–1950(2001) DOI: 10.1002/app.1292Search in Google Scholar
Schwarzinger, C., et al., “Analysis of Wood Polymer Composites by Two-stage Pyrolysis-GC/MS”. J. Anal. Appl. Pyrolysis, 83, 213–219(2008) DOI: 10.1016/j.jaap.2008.09.008Search in Google Scholar
Tascioglu, C., et al., “Monitoring Fungal Degradation of E-Glass/Phenolic Fiber Reinforced Polymer (FRP) Composites Used in Wood Reinforcement”, Int. Biodeterior. Biodegrad., 51, 157–165(2003) DOI: 10.1016/S0964-8305(02)00100-2Search in Google Scholar
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