Vpliv plazemske obdelave bukovine in smrekovine na lepljenje z MUF lepilom

Kotnik, Klemen (author), Šernek, Milan (author)

Proučevali smo vpliv plazemske obdelave na lepljenje lesa navadne bukve (Fagus sylvatica L.) in navadne smreke (Picea abies Karst.) z melamin-urea-formaldehidnim (MUF) lepilom. Izdelali smo 12 trislojnih lepljencev in sicer 4 iz bukovine, 4 iz smrekovine in 4 hibridne, kjer sta bili zunanji lameli iz bukovine, notranja pa iz smrekovine. Polovico lamel smo pred lepljenjem plazemsko obdelali, druge polovice pa ne. Ugotovili smo, da plazemska obdelava ni bistveno vplivala na strižno trdnost lepilnih spojev. Tako kontrolni kot plazemsko obdelani preizkušanci so imeli podobne strižne trdnosti znotraj vsake vrste lepljenca (bukev, smreka in hibrid), v večini primerov pa je prišlo do 100 % loma po lesu. Pri dveh metodah delaminacijskega testa po standardu EN 14080 (B in C) smo opazili razliko v deležu delaminacije med kontrolnimi in plazemsko obdelanimi bukovimi lepljenci, kjer je plazemska obdelava površin lamel pred lepljenjem izboljšala adhezijo z MUF lepilom.

• Language: Slovenian
• Keywords: adhezija, bukev, delaminacija, les, MUF lepilo, plazma, smreka, strižna trdnost
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: Str. 49-60
• Numbering: Let. 74, št. 2
• PID: 20.500.12556/RUL-177620
• UDC: 630*824.85:52-726
• ISSN on article: 2590-9932
• DOI: 10.26614/les-wood.2025.v74n02a05
• COBISS.SI-ID: 261481475
• Publication date in RUL: 29.12.2025

Record is a part of a journal

• Title: Les
• Publisher: Biotehniška fakulteta, Oddelek za lesarstvo, Biotehniška fakulteta, Oddelek za lesarstvo, Založba Univerze
• ISSN: 2590-9932
• COBISS.SI-ID: 290940672

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: English
• Title: Influence of plasma treatment of beech and spruce wood on bonding with MUF adhesive

Abstract

The influence of plasma treatment on the bonding of European beech (Fagus sylvatica L.) and Norway spruce (Picea abies Karst.) wood with a melamine-urea-formaldehyde (MUF) adhesive was investigated. Twelve three-layer beams were made: four of beech, four of spruce, and four hybrid, with the outer lamellae made of beech and the inner one of spruce. Half of the lamellae were plasma treated before gluing, the other half were not. It was found that plasma treatment did not significantly affect the shear strength of adhesive joints. Both control and plasma-treated specimens exhibited similar shear strength within each type of glulam beam (beech, spruce, and hybrid), and in most cases there was 100% wood failure. In two delamination test methods according to standard EN 14080 (B and C), a difference in the degree of delamination was observed between the control and plasma-treated beech specimens, where plasma treatment of the lamellae surfaces prior to bonding improved adhesion with MUF adhesive.

• Keywords: adhesion, beech, wood, MUF adhesive, plasma, spruce, shear strength

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: J4-60072-2025
• Name: Izboljšanje adhezije v hibridnem lepljenem lameliranem lesu z inovativno predobdelavo površin lesa

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P4-0015-2020
• Name: Les in lignocelulozni kompoziti