Odpornost proti glivam s silicijevimi snovmi modificiranega lesa : diplomsko delo (visokošolski strokovni študij)

Smolko, Klavdija (author), Pohleven, Franc (mentor), Petrič, Marko (reviewer)

Vzorce rdečega bora in bukve smo modificirali s sredstvi na osnovi silicija. Uporabili smo več različnih raztopin. Da bi ugotovili fungicidno odpornost, smo vzorce izpostavili trem lesnim glivam: kletni gobi (Ciniophora puteana), hišni gobi (Poria placenta) in pisani ploskocevki (Trametes versicolor). Ugotavljali smo tudi odpornost na mehko trohnobo, bakterije in modul elastičnosti lesa. Najmanjša izguba modula elastičnosti po modifikaciji in osmih tednih izpostavljenosti zemlji je bila pri borovih vzorcih, modificiranih z nerazredčenim sredstvom metiltrietoksisilana; pri bukvi pa pri vzorcih, modificiranih z nerazredčenim sredstvom tetraetoksisilana. Z vodnim steklom pa smo opravili tudi test izpiranja po EN 84 in skušali ugotoviti, ali čas utrjevanja vpliva na odpornost na glive. Mikroskopske raziskave so pokazale tipične znake trohnob. Ugotovili smo, da sta modifikacijski sredstvi (SMK2100 (100 %) in HS2090 (20 %) vidno prisotni v celicah. Mini-blok test z glivama Coniophora puteana in Poria placenta ni uspel, s Trametes versicolor pa je pokazal, da je najbolj odporno modifikacijsko sredstvo PTEO; tu je bila izguba mase vzorcev manjša od 10 %.

• Language: Slovenian
• Keywords: modifikacija lesa, silicij, fungicidna odpornost, vodno steklo, test ENV 807
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [K. Smolko]
• Year: 2006
• Number of pages: XIII, 68 f.
• PID: 20.500.12556/RUL-117
• UDC: 630*841.1
• COBISS.SI-ID: 1403017
• Publication date in RUL: 11.07.2014

Secondary language

• Language: English
• Title: Resistance of wood, modified with silicon substances, to fungi : graduation thesis (higher professional studies)

Abstract

Pine and beech samples were modified using various silicon chemicals. To find out fungicidal resistance the samples were exposed to 3 wood fungi: Coniophora puteana, Poria placenta and Trametes versicolor. Resistance to soft rot, bacteria and dynamic module of elasticity were studied also. After the modification and 8 weeks long exposition to soil beds, the smallest loss of elasticity module was found at pine samples, modified with MTES (100 %); and with TEOS (100 %) at beech. To find out whether the fixation time has any influence on fungi, EN 84 washing out test with water glass was performed. Microscopic research showed typical signs of either soft, brown or white rot. Modification means SMK2100-100 % and HS2090-20 %) were observed in the cells. Mini-block test with Coniophora puteana and Poria placenta did not succeed. The test with Trametes versicolor proved PTEO to be the most resistant modification means, the mass loss of the samples was less than 10 %.

• Keywords: wood modification, silicon, fungicidal activity, mini-block test method, water glass, ENV 807