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Hosseinpourpia, RezaORCID iD iconorcid.org/0000-0003-0883-2306
Publications (10 of 29) Show all publications
Hosseinpourpia, R., Adamopoulos, S. & Parsland, C. (2019). Utilization of different tall oils for improving the water resistance of cellulosic fibers. Journal of Applied Polymer Science, 136(13), Article ID 47303.
Open this publication in new window or tab >>Utilization of different tall oils for improving the water resistance of cellulosic fibers
2019 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 136, no 13, article id 47303Article in journal (Refereed) Published
Abstract [en]

This study was conducted to assess the effect of the pulping by-products crude tall oil (CTO), distilled tall oil (DTO), andtall oil fatty acid (TOFA) on dynamic water vapor sorption behavior, interfiber strength, and thermal stability of cellulosic paper-sheets.The results were compared against those obtained in cellulose papers treated with the conventional petroleum-derived hydrophobicagent hydrowax and in untreated ones. The tall oil treatments caused strong reduction in equilibrium moisture content of the paper-sheets during adsorption and desorption runs. The same trend was noticed for the hydrowax-treated papers, however, it was lesspronounced than the CTO-treated and DTO-treated samples in the relative humidity range of 75–95%. The sorption hysteresis was con-siderably decreased after the treatments. The ultimate dry-tensile strengths of the paper-sheets were significantly reduced by TOFA andhydrowax treatments, while CTO and DTO showed comparable strength as that of untreated control. The ultimate wet-strengths of thepaper-sheets were improved after the treatments. The thermal stability of the specimens was improved by the tall oil treatments, and thehydrowax-treated samples illustrated lower degradation temperature than the untreated control. The results are promising for the use oftall oils as alternative hydrophobic agents of cellulosicfiber-based products, such as wood panels and paper packaging.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2019
National Category
Wood Science Composite Science and Engineering Paper, Pulp and Fiber Technology Bio Materials Polymer Chemistry
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-78872 (URN)10.1002/app.47303 (DOI)000454418300034 ()
Funder
VINNOVA, 2015‐04825The Kamprad Family Foundation, 20160052
Available from: 2018-11-19 Created: 2018-11-19 Last updated: 2019-01-22Bibliographically approved
Hosseinpourpia, R., Adamopoulos, S. & Mai, C. (2018). Effects of acid pre-treatments on the swelling and vapor sorption of thermally modified Scots pine (Pinus sylvestris L.) wood. BioResources, 13(1), 331-345
Open this publication in new window or tab >>Effects of acid pre-treatments on the swelling and vapor sorption of thermally modified Scots pine (Pinus sylvestris L.) wood
2018 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 13, no 1, p. 331-345Article in journal (Refereed) Published
Abstract [en]

Scots pine sapwood samples were pre-treated with a Lewis acid (AlCl3) and a combination of Lewis and protonic acids (AlCl3 and H2SO4), and were subsequently exposed to respective temperatures of 180 °C and 120 °C for establishing a comparable mass loss with those impregnated with demineralized water and solely thermally modified at 220 °C. Water impregnated samples dried at 120 °C also served as controls. The swelling behavior of all wood samples was examined with respect to maximum swelling in water, anti-swelling efficiency (ASE), shrinkage, and dynamic water vapor sorption at relative humidity ranges of 0% to 95%. The thermal modification at 220 °C diminished swelling and moisture adsorption, and also reduced moisture increment and decrement compared with the unmodified control. However, it was less obvious than both acid pre-treated samples. Excess surface work and Hailwood-Horrobin results calculated from water vapor sorption studies demonstrated that, at comparable mass loss, the available sorption sites were reduced to a greater extent by Lewis acid and combination of Lewis and protonic acids pre-treatment than the sole thermal treatment. This was attributed to more pronounced degradation of polysaccharides, mainly hemicelluloses and amorphous parts of cellulose, and to cross-linking of cell wall polymers due to the acid pre-treatments.

National Category
Wood Science Polymer Chemistry
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-68862 (URN)10.15376/biores.13.1.331-345 (DOI)000427790000027 ()
Available from: 2017-11-20 Created: 2017-11-20 Last updated: 2018-04-06Bibliographically approved
Altgen, M., Willems, W., Hosseinpourpia, R. & Rautkari, L. (2018). Hydroxyl accessibility and dimensional changes of Scots pine sapwood affected by alterations in the cell wall ultrastructure during heattreatment. Polymer degradation and stability, 152, 244-252
Open this publication in new window or tab >>Hydroxyl accessibility and dimensional changes of Scots pine sapwood affected by alterations in the cell wall ultrastructure during heattreatment
2018 (English)In: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 152, p. 244-252Article in journal (Refereed) Published
Abstract [en]

There is a complex link between the water sorption behavior and the presence of accessible hydroxyl groups in the wood cell wall, which can be altered by heat-treatment (HT). This study analyses the effect of changes in the cell wall ultrastructure caused by two HT techniques on the hydroxyl accessibility, water vapor sorption and dimensional changes of Scots pine (Pinus sylvestris L.) sapwood. HT of wood in pressurized hot water at 120-170 °C was applied to cause the preferential bond cleavage, whereas HT of wood in oven-dry state in superheated steam at 180-240 °C was performed to create additional covalent cross-links within the cell wall matrix. Removal of cell wall polymers by HT and water leaching reduced the oven-dry dimensions of wood and enhanced the cellulose aggregation during drying. Cellulose aggregation restricted the cell wall shrinkage in circumferential direction, resulting in inhomogeneous shrinkage of the cell wall with only little changes in lumen volume by HT. Cellulose aggregation also reduced the water-saturated dimensions, but a decrease in swelling was only achieved when additional cross-links were formed by HT in dry state. Additional cross-links in the cell wall matrix also resulted in an additional reduction in water sorption at 25 °C and 93% RH. However, this was not caused by a further reduction in the hydroxyl accessibility. Instead, cross-linking was shown to reduce the amount of accessible OH groups that are simultaneously active in sorption, which was explained based on the concept of sorption of water dimers at hydroxyl group pairs at high RH levels.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Elemental analysis, Hydrogen-deuterium exchange, Mercury intrusion porosimetry, Thermal degradation, Water interactions, Wood
National Category
Wood Science Textile, Rubber and Polymeric Materials
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-74031 (URN)10.1016/j.polymdegradstab.2018.05.005 (DOI)000435059100023 ()
Available from: 2018-05-09 Created: 2018-05-09 Last updated: 2018-07-17Bibliographically approved
Hosseinpourpia, R., Echart, A. S., Adamopoulos, S., Gabilondo, N. & Eceiza, A. (2018). Modification of Pea Starch and Dextrin Polymers with Isocyanate Functional Groups. Polymers, 10(9), Article ID 939.
Open this publication in new window or tab >>Modification of Pea Starch and Dextrin Polymers with Isocyanate Functional Groups
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2018 (English)In: Polymers, ISSN 2073-4360, E-ISSN 2073-4360, Vol. 10, no 9, article id 939Article in journal (Refereed) Published
Abstract [en]

Pea starch and dextrin polymers were modified through the unequal reactivity of isocyanate groups in isophorone diisocyanate (IPDI) monomer. The presence of both urethane and isocyanate functionalities in starch and dextrin after modification were confirmed by Fourier transform infrared spectroscopy (FTIR) and 13C nuclear magnetic resonance (13C NMR). The degree of substitution (DS) was calculated using elemental analysis data and showed higher DS values in modified dextrin than modified starch. The onsets of thermal degradation and temperatures at maximum mass losses were improved after modification of both starch and dextrin polymers compared to unmodified ones. Glass transition temperatures (Tg) of modified starch and dextrin were lower than unmodified control ones, and this was more pronounced in modified dextrin at a high molar ratio. Dynamic water vapor sorption of starch and dextrin polymers indicated a slight reduction in moisture sorption of modified starch, but considerably lower moisture sorption in modified dextrin as compared to that of unmodified ones.

Place, publisher, year, edition, pages
MDPI, 2018
National Category
Polymer Chemistry Food Science Wood Science
Research subject
Natural Science, Food Science; Chemistry, Organic Chemistry
Identifiers
urn:nbn:se:lnu:diva-77435 (URN)10.3390/polym10090939 (DOI)000449988800008 ()
Funder
VINNOVA, 2015-04825
Available from: 2018-08-28 Created: 2018-08-28 Last updated: 2018-11-29Bibliographically approved
Cristina, S., Francisco, G., Luis, G., Paloma, d., Hosseinpourpia, R. & Carsten, M. (2017). Comparison of the saturated salt and dynamic vapor sorption methods in obtaining the sorption properties of Pinus pinea L.. European Journal of Wood and Wood Products, 75(6), 919-926
Open this publication in new window or tab >>Comparison of the saturated salt and dynamic vapor sorption methods in obtaining the sorption properties of Pinus pinea L.
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2017 (English)In: European Journal of Wood and Wood Products, ISSN 0018-3768, E-ISSN 1436-736X, Vol. 75, no 6, p. 919-926Article in journal (Refereed) Published
Abstract [en]

Several methods are available for obtaining the sorption isotherms of wood. Among these, the saturated salt and dynamic vapor sorption methods are the most frequently used  ones. For the first time, the hygroscopic response of wood obtained using these two methods is compared. This is done by determining the 35 and 50°C adsorption isotherms of juvenile and mature wood of Pinus pinea L. The hygroscopic behavior of the two types of wood is different, as the mature wood has a higher moisture content than the juvenile wood in the isotherms studied. Comparison of the static saturated salt method and dynamic vapor sorption shows few significant differences between the equilibrium moisture content obtained by each method during the adsorption process, both in a point by point comparison and in the comparison of quadratic polynomial forms of the Guggenheim Anderson-de Boer model. Moreover, in both methods the point of relative humidity from which multilayer sorption predominates over monolayer sorption is similar.

National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-60657 (URN)10.1007/s00107-016-1155-6 (DOI)
Available from: 2017-02-13 Created: 2017-02-13 Last updated: 2018-05-31Bibliographically approved
Taghiyari, H. R., Elyasi, A., Doost-Hoseini, K. & Hosseinpourpia, R. (2017). Correlation between gas and liquid permeability with noise reduction coefficient in insulation boards made from sugar cane bagasse. Bulgarian Journal of Agricultural Science, 23(3), 674-681
Open this publication in new window or tab >>Correlation between gas and liquid permeability with noise reduction coefficient in insulation boards made from sugar cane bagasse
2017 (English)In: Bulgarian Journal of Agricultural Science, ISSN 1310-0351, Vol. 23, no 3, p. 674-681Article in journal (Refereed) Published
Abstract [en]

Specific gas and liquid permeability, as well as noise reduction coefficients, in insulating boards made of sugar-cane bagasse were studied here. Urea-formaldehyde (UF) and melamine-urea-formaldehyde (MUF) were used to produce homogeneous as well as three-layered insulating boards with three densities of 0.3, 0.4, and 0.5 g/cm3. The obtained results indicated that MUF slightly decreased gas and liquid permeability, but it did not significantly affect the noise reduction coefficients. Gas and liquid permeability were considerably affected by the density of the boards, due to the compression between the bagasse particles and less spaces and voids to let the fluids to pass through. However, noise reduction coefficients were significantly affected both by the density, as well as the board-type. More compression between the particles and the consequent less space between the bagasse particles entangled the waves; further more, the sudden change between the layers in the three-layered boards formed a barrier towards transmission of waves.

National Category
Wood Science Agricultural Science Materials Engineering
Identifiers
urn:nbn:se:lnu:diva-67212 (URN)
Available from: 2017-08-11 Created: 2017-08-11 Last updated: 2017-09-15Bibliographically approved
Hosseinpourpia, R., Adamopoulos, S., Holstein, N. & Mai, C. (2017). Dynamic vapour sorption and water-related properties of thermally modified Scots pine (Pinus sylvestris L.) wood pre-treated with proton acid. Polymer degradation and stability, 138, 161-168
Open this publication in new window or tab >>Dynamic vapour sorption and water-related properties of thermally modified Scots pine (Pinus sylvestris L.) wood pre-treated with proton acid
2017 (English)In: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 138, p. 161-168Article in journal (Refereed) Published
Abstract [en]

This study investigates the effect of proton acid pre-treatment and subsequent thermal modification at relatively low temperatures (up to 180 °C) on wood with respect to dimensional stability and water vapour sorption properties. The effects are compared to those of solely thermally-modified wood at higher temperatures (up to 250 °C). Scots pine sapwood (P. sylvestris L.) was impregnated with a proton acid or demineralised water, and subsequently, thermally modified to various mass losses (ML). Acid pre-treatment and thermal modification improved the dimensional stability and reduced the equilibrium moisture content (EMC) until certain ML. Excess surface work (ESW) obtained from vapour sorption studies indicated that, at comparable ML, the acid pre-treatment reduced the available sorption sites as compared to sole thermal treatment. Samples pre-treated with acid also showed stronger decreasing courses of EMC- and ESW-ratios than sole thermally modified ones. This was attributed to degradation of amorphous wood polymers and a stiffer matrix due to cross-linking of the cell wall polymers as a consequence of acid pre-treatment. Electron spin resonance (ESR) analysis indicated that acid pre-treatment did not enhance the concentration of phenoxy radicals, whereas thermally modified wood showed a considerably higher concentration of phenoxy radicals, suggesting that high radical density cannot be used as an indicator for high matrix stiffness.

Place, publisher, year, edition, pages
Elsevier, 2017
National Category
Wood Science Polymer Chemistry
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-61692 (URN)10.1016/j.polymdegradstab.2017.03.009 (DOI)000400222500018 ()
Available from: 2017-03-24 Created: 2017-03-24 Last updated: 2018-06-01Bibliographically approved
Hosseinpourpia, R., Adamopoulos, S., Mai, C. & Hemmilä, V. (2017). Effect of Bio-Based Additives on Physico-Mechanical Properties of Medium Density Fibreboards. In: Ivica Zupcic; Vjekoslav Zivkovic; Josip Miklecic (Ed.), 28th International Conference on Wood Science and Technology (ICWST), Zagreb, Croatia, 7-8 December, 2017: . Paper presented at 28th International Conference on Wood Science and Technology, Zagreb, Croatia, 7-8 December, 2017 (pp. 153-158). University of Zagreb, Faculty of Forestry
Open this publication in new window or tab >>Effect of Bio-Based Additives on Physico-Mechanical Properties of Medium Density Fibreboards
2017 (English)In: 28th International Conference on Wood Science and Technology (ICWST), Zagreb, Croatia, 7-8 December, 2017 / [ed] Ivica Zupcic; Vjekoslav Zivkovic; Josip Miklecic, University of Zagreb, Faculty of Forestry , 2017, p. 153-158Conference paper, Published paper (Refereed)
Abstract [en]

Dimensional stability of wood-based panels is generally improved with application of suitable additives. Most of these additives, such as paraffin wax, are petroleum-based and with relatively high cost, and therefore, it is desirable to develop low-cost and effective substitutes from renewable resources. This work studied the potential of using a renewable water-repellent additive, such as tall oil fatty acid, for lab-scale manufacturing of medium density fibreboards (MDF). Tall oil fatty acid (TOFA) was used at 1 and 3% w/w of urea formaldehyde (UF) resin. MDF panels with similar concentrations of paraffin wax (wax) and panels without adding a water-repellent agent were served as controls. It was assessed the dimensional stability of the panels in terms of thickness swelling and water uptake after 4 and 24h immersion in water, and their mechanical performance in terms of modulus of elasticity, modulus of rupture and internal bonding. Results showed no obvious differences in the strength behaviour of the panels by addition of water-repellent agents. Dimensional stability, however, considerably improved by addition of TOFA, but it was still inferior when compared to that provided by wax.   

Place, publisher, year, edition, pages
University of Zagreb, Faculty of Forestry, 2017
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-69168 (URN)978-953-292-053-6 (ISBN)
Conference
28th International Conference on Wood Science and Technology, Zagreb, Croatia, 7-8 December, 2017
Funder
The Crafoord Foundation, 20160533VINNOVA, 2015-04825
Note

Ej belagd 180212

Available from: 2017-12-11 Created: 2017-12-11 Last updated: 2018-03-14Bibliographically approved
Hosseinpourpia, R., Adamopoulos, S. & Mai, C. (2017). Effect of lignin and hemicelluloses removal on dynamic water vapour sorption behavior of wood. In: IUFRO Division 5 Conference, 12-14 June, 2017 - Vancouver, British Columbia: Final program, proceedings and abstracts. Paper presented at IUFRO Division 5 Conference, 12-14 June, 2017 - Vancouver, British Columbia. IUFRO Division 5 Conference
Open this publication in new window or tab >>Effect of lignin and hemicelluloses removal on dynamic water vapour sorption behavior of wood
2017 (English)In: IUFRO Division 5 Conference, 12-14 June, 2017 - Vancouver, British Columbia: Final program, proceedings and abstracts, IUFRO Division 5 Conference , 2017Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Water-related properties of wood are strongly depended on the sorption behavior of its hygroscopic polymers such as cellulose, hemicelluloses and lignin. To assess the sorption performance of wood matrix in the absence of hemicelluloses and lignin, micro-veneers of Scots pine (Pinus sylvestris L.) were hydrolyzed with sulphuric acid and delignified with sodium chlorite and acetic acid, respectively. The dynamic water vapour sorption of the hydrolyzed, delignified and untreated veneers was studied in a dynamic vapour sorption (DVS) apparatus. The moisture adsorption of hydrolyzed veneers was decreased in the relative humidity (RH) range above 60-70 %. Delignified veneers, however, showed obviously higher moisture adsorption at RH above 70%, as compared to untreated controls. Hydrolyzed and untreated veneers exhibited a comparable hysteresis, while delignified veneers showed a considerably lower hysteresis in comparison to them. This explains that, despite the fact that the hydrophilic hemicelluloses influence the moisture sorption of wood, the expand-ability of the cell wall matrix is mainly controlled by lignin.

Place, publisher, year, edition, pages
IUFRO Division 5 Conference, 2017
National Category
Wood Science
Identifiers
urn:nbn:se:lnu:diva-65618 (URN)978-0-9817876-7-1 (ISBN)
Conference
IUFRO Division 5 Conference, 12-14 June, 2017 - Vancouver, British Columbia
Available from: 2017-06-20 Created: 2017-06-20 Last updated: 2017-06-28Bibliographically approved
Taghiyari, H. R., Hosseinpourpia, R., Adamopoulos, S., Jahangiri, A. & Rabie, D. (2017). Effects of Nano-Wollastonite Impregnation on Fire Properties of Some Thermally-Treated Solid Wood Species. In: Proceedings IRG Annual Meeting, IRG/WP 17-40771: . Paper presented at IRG48 Scientific Conference on Wood Protection,Ghent, Belgium, 4-8 June 2017. International research group on wood protection
Open this publication in new window or tab >>Effects of Nano-Wollastonite Impregnation on Fire Properties of Some Thermally-Treated Solid Wood Species
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2017 (English)In: Proceedings IRG Annual Meeting, IRG/WP 17-40771, International research group on wood protection , 2017Conference paper, Published paper (Refereed)
Abstract [en]

The effects of nano-wollastonite (NW) suspension impregnation on the fire-retarding properties of heat-treated solid wood of three species (beech, poplar, fir) were studied. Heat treatment was performed at two temperatures of 180 °C and 200 °C. Impregnation was carried out at a pressure of 3 bars for 30 min. The fire properties included ignition time, glowing time, back-darkening, back-splitting, back-firing, and length and width of the burnt area. Both impregnation with NW and heat-treatment generally improved all fire-retarding properties, although not always to a significant level. As a mineral material, NW acted like a physical shield against fire penetration into the texture of wood specimens, thus improving fire properties. Moreover, the high thermal conductivity coefficient of wollastonite increased the thermal conductivity of wood, therefore preventing the accumulation of heat at the point nearest to a piloted flame and contributing to the improvement of fire properties. The chemical degradation of wood cell components caused by heat-treatment further improved the fire properties. Cluster analysis indicated the significant effect of species on fire properties. Significant R-square values were found amongst fire properties related to the spread of fire on the surface of specimens. The combination of thermal modification and impregnation with NW provides suitable fire properties for solid wood.

Place, publisher, year, edition, pages
International research group on wood protection, 2017
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-62494 (URN)
Conference
IRG48 Scientific Conference on Wood Protection,Ghent, Belgium, 4-8 June 2017
Note

Ej belagd 180215

Available from: 2017-04-17 Created: 2017-04-17 Last updated: 2018-02-16Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0003-0883-2306

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