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Trischler, Johann
Publications (10 of 16) Show all publications
Trischler, J., Sandberg, D. & Dorn, M. (2018). Effect of temperature during vital gluten adhesive preparation and application on shear-bond strength. Journal of Adhesion Science and Technology, 32(4), 448-455
Open this publication in new window or tab >>Effect of temperature during vital gluten adhesive preparation and application on shear-bond strength
2018 (English)In: Journal of Adhesion Science and Technology, ISSN 0169-4243, E-ISSN 1568-5616, Vol. 32, no 4, p. 448-455Article in journal (Refereed) Published
Abstract [en]

If protein-based adhesives are to become a competitive bio-based alternative to synthetic adhesives, the preparation and application methods have to be considerable improved to reduce process time and thereby improve the economy of the adhesive system. The purpose of this study was to investigate the impact of the temperature during preparation and application on the shear-bond strength of an adhesive based on vital gluten for use in wood applications. Vital gluten was used in its natural form and mixed with water of different temperatures (preparation temperature 0 °C or 20 °C), and applied on beech veneer at different temperature (application temperature –10, 20, 60 and 100 °C). Tensile shear-bond strength samples were prepared and tested according to EN 205. The results showed that an increase in veneer temperature during application of the adhesive led to a decrease in the shear-bond strength, but that the preparation temperature of the adhesive had no influence on the strength.

Place, publisher, year, edition, pages
Taylor & Francis, 2018
Keywords
application temperature; bond line; preparation temperature; protein adhesive
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-67324 (URN)10.1080/01694243.2017.1362807 (DOI)000419353700009 ()2-s2.0-85027024483 (Scopus ID)
Available from: 2017-08-20 Created: 2017-08-28 Last updated: 2019-08-29Bibliographically approved
Trischler, J., Sandberg, D. & Dorn, M. (2018). Vital gluten for particleboard production: effect of wood-particle moisture on board properties. Forest products journal, 68(2), 127-131
Open this publication in new window or tab >>Vital gluten for particleboard production: effect of wood-particle moisture on board properties
2018 (English)In: Forest products journal, ISSN 0015-7473, Vol. 68, no 2, p. 127-131Article in journal (Refereed) Published
Abstract [en]

The growing environmental awareness is leading to an increased interest in the use of bio-based adhesives and proteins such as vital gluten. The purpose of this study was to investigate the influence of the wood-particle moisture content, water application and press time on the internal bond strength, thickness expansion and thickness swelling of particleboards glued with vital gluten. Green and dried wood particles with similar moisture contents were achieved through drying or water addition and were blended with vital gluten powder and pressed for 1 to 3 minutes. The results show that not only the pressing time and moisture content, but also the way of achieving the moisture content has a strong impact on the performance of the boards. At comparable moisture content, never-dried (green) particles with high moisture content in combination with a dry adhesive application produced boards which performed better than boards made of dry particles with water addition to simulate liquid adhesive application.

Place, publisher, year, edition, pages
Forest Products Society, 2018
Keywords
bio-based adhesive, internal bond strength, particle configuration, thickness swelling.
National Category
Wood Science Composite Science and Engineering
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-69428 (URN)10.13073/FPJ-D-17-00036 (DOI)000461045800005 ()2-s2.0-85064054911 (Scopus ID)
Available from: 2017-12-21 Created: 2017-12-21 Last updated: 2019-08-29Bibliographically approved
Trischler, J. (2016). Strategic raw material supply for the particleboard-producing industry in Europe: Problems and challenges. (Doctoral dissertation). Växjö: Linnaeus University Press
Open this publication in new window or tab >>Strategic raw material supply for the particleboard-producing industry in Europe: Problems and challenges
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Particleboard was invented to increase the utilization of wood and it soon became an important core material for furniture production. Nowadays, other industries such as the pulp and papermaking industry and the thermal energy recovery industry claim the same type of raw material. This leads to increasing competition and higher prices than in the past when that kind of wood raw material was widely available and of low price. The particleboard-producing industry is therefore seeking opportunities to reduce the competition and ensure the future supply of lignocellulosic raw material for their products.

The purpose of the work summarised in this thesis was to investigate the strategic supply of lignocellulosic raw materials for particleboard production and to evaluate alternatives for the supply of lignocellulosic raw material for particleboard production.

To encompass the complex field of strategic raw material supply, several publications have considered different stages along the supply chain. These papers range from empirical studies to practical tests on a laboratory scale. In this thesis, some of the papers are linked together, building the base for the overall results.

The results show that the task of increasing the supply of lignocellulosic raw material as primary raw material source is limited by several factors, but that improved product design coupled with a suitable recycling concept can greatly increase the availability of lignocellulosic raw material as a secondary source. Alternatively, the use of non-wood plants might be an opportunity to substitute wood as raw material but there are still some problems relating to the particle properties which must be overcome first.

Place, publisher, year, edition, pages
Växjö: Linnaeus University Press, 2016. p. 68
Series
Linnaeus University Dissertations ; 254/2016
Keywords
Biomass production, Lignocellulosic raw material, Non-wood plants, Particleboard, Pulp and paper, Recycling, Thermal energy recovery, Wood plants
National Category
Wood Science Bioenergy
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-53700 (URN)978-91-88357-21-2 (ISBN)
Public defence
2016-06-08, Fullriggaren, Sjöfartshögskolan, Kalmar, 09:00 (English)
Opponent
Supervisors
Available from: 2016-08-18 Created: 2016-06-17 Last updated: 2016-11-24Bibliographically approved
Trischler, J. & Sandberg, D. (2015). Anaerobic digestion of monocotyledons in particleboard production: a concept of process integration to increase substitution of wood raw material. International Wood Products Journal, 6(4), 154-164
Open this publication in new window or tab >>Anaerobic digestion of monocotyledons in particleboard production: a concept of process integration to increase substitution of wood raw material
2015 (English)In: International Wood Products Journal, ISSN 2042-6445, E-ISSN 2042-6453, Vol. 6, no 4, p. 154-164Article in journal (Refereed) Published
Abstract [en]

The purpose of this conceptual study was to introduce a possibility of integrating a surface treatment of monocotyledons by enzymes into particleboard production to provide a substitute raw material to replace wood particles. Because of the greater competition for wood as a raw material for particleboard production, there is increasing interest in monocotyledons as a substitute for wood. Monocotyledons, such as grass or cereal straw, differ from wood mostly in that they have a surface layer of waxes and embedded silica. If particles of monocotyledons are to be used in combination with wood in particleboards they must be modified. Using the concept of anaerobic digestion, it is possible to modify the surface of monocotyledon particles, having methane as a side product and to achieve a process, which leads to greater product diversity. A SWOT analysis was used to evaluate the process.

Place, publisher, year, edition, pages
Taylor & Francis, 2015
National Category
Construction Management
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-53842 (URN)10.1179/2042645315Y.0000000011 (DOI)000219000600001 ()2-s2.0-84962604328 (Scopus ID)
Available from: 2016-06-17 Created: 2016-06-17 Last updated: 2018-04-18Bibliographically approved
Trischler, J., Sandberg, D. & Nuszkowski, K. (2015). The use of gluten adhesive and removable surface finishes in rebyblable furniture panels. Pro Ligno, 11(4), 613-618
Open this publication in new window or tab >>The use of gluten adhesive and removable surface finishes in rebyblable furniture panels
2015 (English)In: Pro Ligno, ISSN 1841-4737, E-ISSN 2069-7430, Vol. 11, no 4, p. 613-618Article in journal (Refereed) Published
Abstract [en]

A general problem in the recycling of furniture is that different materials and components are included within a single piece of furniture. Not only is the furniture built of components such as wood, leather, textiles, foams, steel and others but the wood component is also very often a composite made of wood, adhesives and functional additives such as water repellents or chemical substances as surface treatments. Sometimes these additives make cost-effective recycling of the composite wood difficult because of problems related to the separation of the components. The purpose of this study was to present an alternative product design for wood-based panels i.e. particleboards, which reduces or avoids many of the problems in the recycling of wood-based panels used in furniture. The results show that it is possible to produce wood-based panels in a way that facilitates the recycling of these panels although there are still some challenges which have to be dealt with. The concept as such seems to be promising. 

National Category
Wood Science Construction Management
Identifiers
urn:nbn:se:lnu:diva-53691 (URN)
Available from: 2016-06-17 Created: 2016-06-17 Last updated: 2017-11-28Bibliographically approved
Trischler, J. & Sandberg, D. (2015). Wheat protein as adhesive for wood products for interior use. Pro Ligno, 11(4), 246-252
Open this publication in new window or tab >>Wheat protein as adhesive for wood products for interior use
2015 (English)In: Pro Ligno, ISSN 1841-4737, E-ISSN 2069-7430, Vol. 11, no 4, p. 246-252Article in journal (Refereed) Published
Abstract [en]

Protein is one of the most researched and widely used natural adhesives. Before the break through of synthetic adhesives in the wood industry, proteins were commonly used in furniture production. Today, proteins in the form of industrial by-products e.g. soy protein, blood and wheat protein are on the market, and these proteins can in general be used as a base for wood-products adhesives. Proteins are in general denatured by a change in pH, heat or organic solvents before they can be used as adhesives. In this study, a cold-dissolution of wheat protein (gluten) was tested with regard to its usability for the production of particleboards and laminated veneer products. The bonding was evaluated by testing the internal bond strength, thickness swelling, tensile strength and tensile shear strength. The results showed that the strength of the bond-line was in some cases as high as the strength of the wood material, but also that there were in some cases problems with the penetration of the adhesive into the wood and this lowered the bond-line strength considerably. The main conclusion is that cold-dissolved gluten adhesives are a good alternative to commercial synthetic adhesives for interior use, but that there are still challenges with the poor moisture resistance of the adhesive. 

National Category
Construction Management Wood Science
Identifiers
urn:nbn:se:lnu:diva-53692 (URN)
Available from: 2016-06-17 Created: 2016-06-17 Last updated: 2017-11-28Bibliographically approved
Trischler, J., Sandberg, D. & Thörnqvist, T. (2014). Estimating the Annual Above-Ground Biomass Production of Various Species on Sites in Sweden on the Basis of Individual Climate and Productivity Values. Forests, 5(10), 2521-2541
Open this publication in new window or tab >>Estimating the Annual Above-Ground Biomass Production of Various Species on Sites in Sweden on the Basis of Individual Climate and Productivity Values
2014 (English)In: Forests, ISSN 1999-4907, E-ISSN 1999-4907, Vol. 5, no 10, p. 2521-2541Article in journal (Refereed) Published
Abstract [en]

The literature contains a large number of bioclimate, climate and biometric models for estimating the production of different species or stands under specific conditions on a defined site or models giving the distribution of a single species. Depending on the model used, the amount of input data required varies considerably and often involves a large investment in time and money. The purpose of this study was to create a model to estimate the annual above-ground biomass production of various species from site conditions defined by mean annual temperature and mean annual precipitation. For this approach, the Miami model of Lieth was used as a base model with some modifications. This first version of the modified model was restricted to sites in Sweden, where changes in the soil and groundwater level were relatively small, and where the growth of land vegetation was mostly dependent on temperature. A validation of this model has shown that it seems possible to use the Miami model to estimate the annual above-ground biomass production of various species, and that it was possible to compare the annual above-ground biomass production of different species on one site, as well as the annual above-ground biomass production of different species on different sites using the modeled data.

Keywords
MAT, MAP, bioclimatic model, above-ground biomass production
National Category
Forest Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-38556 (URN)10.3390/f5102521 (DOI)000344352900007 ()2-s2.0-84921412221 (Scopus ID)
Available from: 2014-12-09 Created: 2014-12-09 Last updated: 2017-12-05Bibliographically approved
Trischler, J., Sandberg, D. & Thörnqvist, T. (2014). Evaluating the Competition of Lignocellulose Raw Materials for their Use in Particleboard Production, Thermal Energy Recovery, and Pulp- and Papermaking. BioResources, 9(4), 6591-6613
Open this publication in new window or tab >>Evaluating the Competition of Lignocellulose Raw Materials for their Use in Particleboard Production, Thermal Energy Recovery, and Pulp- and Papermaking
2014 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 9, no 4, p. 6591-6613Article in journal (Refereed) Published
Abstract [en]

There is increasing competition for raw materials between particleboard production, thermal energy recovery, and pulp-and papermaking. According to different scenarios, the consumption of lignocellulosic raw materials is increasing, which means that the competition is increasing. The primary production of lignocellulosic raw material in some regions may therefore reach the limit of sustainability; i.e., the lignocellulosic raw material must be used more efficiently to reduce the risk of a shortage. The physical and chemical properties of the lignocellulosic raw material of selected species have therefore been surveyed, and the raw material properties that are important for each of the three competitors have been defined. The aim of the study is to characterise the lignocellulosic raw materials according to the three competing users and to show whether they are high or low in competition. As methods, a relative ranking of the species regarding their raw material properties and regarding the requirements of the competitors as well as cluster analysis were chosen. The results show that the most favourable raw materials are from coniferous species, while monocotyledon species show an opposite trend.

Keywords
Wood using industry, Properties of raw material, Requirements for raw materials, Expression of competition
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-39133 (URN)000345396900066 ()2-s2.0-84911423135 (Scopus ID)
Available from: 2015-01-15 Created: 2015-01-15 Last updated: 2019-08-27Bibliographically approved
Trischler, J. & Sandberg, D. (2014). Monocotyledons in Particleboard Production: Adhesives, Additives, and Surface Modification of Reed Canary Grass. BioResources, 9(3), 3919-3938
Open this publication in new window or tab >>Monocotyledons in Particleboard Production: Adhesives, Additives, and Surface Modification of Reed Canary Grass
2014 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 9, no 3, p. 3919-3938Article in journal (Refereed) Published
Abstract [en]

As a supplier to the furniture industry, the particleboard industry is searching for opportunities to reduce costs, weight, and formaldehyde emissions. One such opportunity is to use monocotyledons such as straw and hemp, as well as grasses like reed canary grass. A major problem when using reed canary grass or other monocotyledons in combination with wood is the difference in their surface properties, leading to poor reactivity and wettability with adhesives such as melamine urea formaldehyde. To this end, either the surface of the particles must be modified in some way, or different adhesives must be used. The purpose of this paper is to present adhesives, surfactants, coupling agents, and pre-treatment methods that can be used in combination with monocotyledons to improve compatibility with wood. Some of the methods have been tested on reed canary grass. The results show a wide range of strength values for the joint between wood and untreated or pre-treated reed canary grass glued with different adhesives, with and without a surfactant and a coupling agent. Isocyanate-based adhesives provided relatively strong bonds, and polyvinyl acetate, acryl, and epoxy adhesives were also effective. The most effective method was pre-treatment followed by adhesives in combination with a coupling agent.

Keywords
De-waxing, Surfactant, Coupling agent, Gluing, Lignocellulose plants
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-38559 (URN)000344184300016 ()2-s2.0-84901349915 (Scopus ID)
Available from: 2014-12-09 Created: 2014-12-09 Last updated: 2019-08-27Bibliographically approved
Sandberg, D., Vasiri, M., Trischler, J. & Ohman, M. (2014). The role of the wood mechanical industry in the Swedish forest industry cluster. Scandinavian Journal of Forest Research, 29(4), 352-359
Open this publication in new window or tab >>The role of the wood mechanical industry in the Swedish forest industry cluster
2014 (English)In: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891, Vol. 29, no 4, p. 352-359Article, review/survey (Refereed) Published
Abstract [en]

The forest and forest products form one of the most important basis for the transfer to a bio-based economy in Sweden. About 75% of the area covered by forest in Sweden is used industrially to produce raw material for the wood-refining industries. Every year, this cluster uses 75 million m(3) of roundwood and has an export value of (sic)12 billion. This review paper is devoted to the wood mechanical industry, i.e. the industry which turns the forest into sawn timber, packaging, construction wood, furniture and interior fittings. The sawmills consume about half of the volume of softwood which is felled, and about two-thirds of the sawn timber go to export without any further refining within the country. Nevertheless, in spite of the relatively low degree of refinement in the sawmill and the fact that the sawmills in general over time have a very low profitability, they are responsible for 70-80% of the forest owners' profits on the sale of timber. An increased upgrading of the sawn timber within the country is desirable from a national economic viewpoint increased employment opportunities, increased export income, etc. It should then in the first place be for products with a higher added value, such as furniture and fittings. Today, the refinement value is 15-20 times higher for products from joinery and furniture industries compared to that of the sawn timber, and the added value of the wood within the building industry is only about 1.5 times.

Keywords
value-added products, strategic raw material supply, forestry
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-36841 (URN)10.1080/02827581.2014.932005 (DOI)000339920100007 ()2-s2.0-84904765271 (Scopus ID)
Available from: 2014-09-10 Created: 2014-09-10 Last updated: 2017-12-05Bibliographically approved
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