Primerjava novih in starejših standardnih postopkov izpiranja bakrovih učinkovin iz lesa : diplomski projekt

Tekalec, Tilen (author), Humar, Miha (mentor), Pohleven, Franc (reviewer)

Leseni izdelki so na prostem izpostavljeni biotskim in abiotskim dejavnikom razgradnje. V kolikor jih ţelimo ohraniti, ga moramo zaščititi z biocidnimi proizvodi, ki lesu znatno podaljšajo trajnost. Poleg učinkovitosti, je dobra vezava v les ena od ključnih zahtev za dober biocidni proizvod. Za zaščito lesa v zahtevnih zunanjih pogojih uporabe se uporabljajo večinoma bakrovi biocidi, ki jim moramo dodati ustrezne dodatke, ki omogočijo vezavo v les. V preteklosti so se v te namene uporabljale predvsem kromove spojine, danes pa bakrove učinkovine kombiniramo z etanolaminom. V okviru te naloge smo fiksacijo bakrovih in kromovih spojin določali s tremi različnimi standardnimi postopki in sicer; CEN/TS 15119-1:2008, CEN/TS 15119-2:2008 ter ENV 1250-2:1994. Ugotovili smo da so postopki zelo selektivni, in da na količino izpranega bakra vpliva čas trajanja izpostavljenosti lesa v stiku z vodo.

• Language: Slovenian
• Keywords: izpiranje bakra, primerjava standardov, zaščita lesa, fiksacija
• Work type: Diploma project paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [T. Tekalec]
• Year: 2014
• Number of pages: IX, 35 f.
• PID: 20.500.12556/RUL-117627
• UDC: 630*841.4
• COBISS.SI-ID: 2262153
• Publication date in RUL: 17.07.2020

Secondary language

• Language: English
• Title: Comparison of new and past standard procedures for leaching of copper active ingredients from wood

Abstract

Wood in outdoor applications is exposed to biotic and abiotic factors of degradation. To protect it biocidal products, significantly extending the service life of wood, should be used. Besides efficacy, fixation is the second most important criterium for high quality formulation. In demanding conditions, predominately copper biocides are applied for the protection of wood They are supplemented with appropriate chemicals enabling fixation. Previously chromium compounds were used, but nowadays copper substances are combined with ethanolamine predominately. Fixation of copper and chromium compounds was determined according to 3 different standard procedures: CEN/TS 15119-1:2008, CEN/TS 15119-2:2008, and ENV 1250-2:1994. Procedures are very selective, and the amount of leached copper is related to the duration and intensity of leaching.

• Keywords: copper leaching, standard comparison, wood protection, fixation