Fungicidne lastnosti lesa impregniranega z vodnimi emulzijami voskov : diplomsko delo - visokošolski strokovni študij

Smrdelj, Gregor (author), Humar, Miha (mentor), Pohleven, Franc (reviewer)

Večina slovenskih lesnih vrst ima neodporen les, zato mu pogosto želimo izboljšati to pomanjkljivost. V preteklosti so se v te namene uporabljali predvsem biocidni pripravki, danes pa želimo odpornost izboljšati predvsem z nekemičnimi rešitvami. Eno od možnosti predstavljajo tudi vodne emulzije voskov. Z namenom osvetliti to možnost smo z izbranimi emulzijami voskov (montanskega, polietilenskega in oksidiranega polietilenskega voska) proizvajalcev BASF in Samson impregnirali smrekove in bukove vzorce in jih po 4 tednih sušenja izpostavili delovanju lesnih gliv. Bukove vzorce smo izpostavili delovanju gliv bele trohnobe (Trametes versicolor, Hypoxylon fragiforme in Pleurotus ostreatus), smrekove pa glivam, ki povzročajo rjavo trohnobo (Gloeophyllum trabeum, Antrodia vaillantii in Serpula lacrymans), kot to predpisuje standard SIST EN 113. Po 16 tednih smo vzorce izolirali in gravimetrično določili izgubo mase. Iz rezultatov je razvidno, da vodne emulzije lahko v določenih primerih dobro zaščitijo les pred glivami razkrojevalkami in podaljšajo življenjsko dobo lesa. Med testiranimi emulzijami sta se najbolje obnesli emulziji polietilenskega voska.

• Language: Slovenian
• Keywords: vodne emulzije voskov, zaščita lesa, lesne glive, montanski vosek, polietilenski vosek
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [G. Smrdelj]
• Year: 2009
• Number of pages: X, 40 f.
• PID: 20.500.12556/RUL-353
• UDC: 630*841
• COBISS.SI-ID: 1716617
• Publication date in RUL: 11.07.2014

Secondary language

• Language: English
• Title: Fungicidal properties of wood impregnated with water based wax emulsions : graduation thesis - higher professional studies

Abstract

The majority of the Slovenian wood species has non-durable wood: therefore, there is general interest to overcome this issue. Biocidal preservatives were used in the past for these purposes, mainly. Nowadays, non-biocidal solutions are preferred. Water wax emulsions are one of the potential solutions. To elucidate this potential, several wax emulsions produced by BASF and Samson (montan, polyethylene, oxidized polyethylene wax) were use for impregnation of wood specimens. After 4 weeks of conditioning, spruce wood specimens were exposed to brown rot fungi (Gloeophyllum trabeum, Antrodia vaillantii in Serpula lacrymans) and beech wood blocks exposed to white rot fungi (Trametes versicolor, Hypoxylon fragiforme in Pleurotus ostreatus) according to the EN 113 procedure. After 16 weeks of exposure, specimens were isolated and their mass loss gravimetrically determined. It can be resolved that some of the wax emulsions can protect wood against wood decay fungi, water emulsions of polyethylene wax, being the most effective.

• Keywords: wax water emulsion, wood preservation, wood decay fungi, montan wax, polyethilene wax