Effect of screw-disc extrusion process on the level of microbiological contamination of wood-plastic composites (WPC)

• Autorzy: Michalska-Pozoga I. , Czerwinska E.
• Języki publikacji: EN

Abstrakty

EN

The article presents the results of an analysis of the effect of the screw-disc extrusion process on the microbiological quality of WPC composites. The research material consisted of components used for the manufacture of wood-plastic composites in a form of flour, and chips from two kinds of trees (deciduous and coniferous), as well as the PP granulate and composites obtained from them. The study was conducted in two stages. Stage I involved determining the microbiological contamination level in the components used for wood-plastic composite manufacturing.Stage II involved an examination of the microbiological purity of the final composites. The composites under examination were in two forms, i.e. rods and plates.The composites were obtained using a screw-disc extruder and molds for plate compression. The microbiological examinations were conducted according to the standard PN-EN ISO 21527-1:2009. It was observed as a result of the analysis performed that the wood waste used for the production of wood-plastic composites demonstrated strong microbiological contamination, unlike the original polymer material used in the composites matrix. Irrespective of the kinds and forms of the chips used (tree species, degree of pulverization and share), the applied extrusion parameters (temperature and pressure) caused the sterilization of the obtained composites. It may be concluded that the problems presented in the literature,related to an occurrence of molds and fungi on WPC elements used outside, are the result of secondary contamination.

• Wydawca: -
• Czasopismo: Drewno. Prace Naukowe. Doniesienia. Komunikaty
• Rocznik: 2015
• Tom: 58
• Numer: 194
• Opis fizyczny: p.65-73,fig.,ref.

Twórcy

autor

Michalska-Pozoga I.

• Koszalin University of Technology, Koszalin, Poland

autor

Czerwinska E.

• Koszalin University of Technology, Koszalin, Poland

Bibliografia

• Grzywacz A. [1997]: Gatunkowa różnorodność biologiczna grzybów rozkładających drewno (The species biodiversity of wood decaying fungi). IV Sympozjum PSMB „Ochrona obiektów przed korozją biologiczną i ogniem” Szklarska Poręba: 69–77
• Janińska B. [2002]: Evaluation methods of mycological pollution of building interiors. Foundations of Civil and Environmental Engineering 3: 47–64
• Flaninngan B. [1992]: Indoor microbiological pollutants – sources, species, characterization and evaluation, chemical, microbiological, health and comfort aspects of indoor air quality – state of the art in SBS. Kluwer Academy Publishers: 73–98
• Mirowski J., Zajchowski S., Tomaszewska J., Ryszkowska J., Urbaniak W. [2010]: PE waste use in production of wood-polymer composites (WPC). Inżynieria i Aparatura �Chemiczna 49 [5]: 83–84
• Rowell R.M. [2006]: Advances and challenges of wood polymer composites. Materials 8th Pacific Rim Bio-based Composites Symposium: “Advances and Challenges in Biocomposites”, Kuala Lumpur, Malaysia
• Rydzkowski T., Michalska-Pożoga I. [2014]: A study on polymer particle flow in a disk zone of a screw-disk extruder. Chemical and Process Engineering 35 [1]: 121–135. DOI: 10.2478/cpe-2014-0009
• Sanchez-Silva M., Rosowsky D. [2008]: Biodeterioration of Construction Materials: State of the Art and Future Challenges. Journal of Materials in Civil Engineering 20 [5]: 352–365. DOI: 10.1061/(ASCE)0899-1561(2008)20:5(352)
• Tomaszewska J., Zajchowski S. [2013]: Study on the mechanical properties and structure of the compounds of PE/PVC recyclates filled with wood flour. Polimery 58 [2]: 106-113. DOI: dx.doi.org/10.14314/polimery.2013.106
• Weinfurter S., Eder A. [2009]: Consumer perception of innovative wood-polymer composite decking with a focus on environmental aspects. Lenzinger Berichte 87: 168–178
• Wilkowski J., Borysiuk P., Górski J., Czarniak P. [2013]: Analysis of relative machinability indexes of wood particle boards bonded with waste thermoplastics. Drewno 56 [190]: 139–144. DOI: 10.12841/wood.1644-3985.039.09
• Witomski P. [2005]: Zagrożenia drewna w zabytkach powodowane przez grzyby (Threats of wood in the monuments caused by a fungus) Materiały konferencyjne: Potrzeby konserwatorskie obiektów sakralnych na przykładzie makroregionu łódzkiego, 9–10 grudnia. Łódź
• List of standards
• PN-EN ISO 21527-1:2009 Microbiology of food and animal feeding stuffs. Horizontal method for the enumeration of yeasts and moulds. Part 1: Colony count technique in products with water activity greater than 0.95

Identyfikatory

DOI

10.12841/wood.1644-3985.088.05