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Hosseinpourpia, RezaORCID iD iconorcid.org/0000-0003-0883-2306
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Hemmilä, V., Adamopoulos, S., Hosseinpourpia, R. & Ahmed, S. A. (2019). Ammonium Lignosulfonate Adhesives for Particleboards with pMDI and Furfuryl Alcohol as Crosslinkers. Polymers, 11(10), 1-17, Article ID 1633.
Öppna denna publikation i ny flik eller fönster >>Ammonium Lignosulfonate Adhesives for Particleboards with pMDI and Furfuryl Alcohol as Crosslinkers
2019 (Engelska)Ingår i: Polymers, ISSN 2073-4360, E-ISSN 2073-4360, Vol. 11, nr 10, s. 1-17, artikel-id 1633Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Tightening formaldehyde emission limits and the need for more sustainable materials have boosted research towards alternatives to urea-formaldehyde adhesives for wood-based panels. Lignin residues from biorefineries consist of a growing raw material source but lack reactivity. Two crosslinkers were tested for ammonium lignosulfonate (ALS)—bio-based furfuryl alcohol (FOH) and synthetic polymeric 4,4′-diphenylmethane diisocyanate (pMDI). The addition of mimosa tannin to ALS before crosslinking was also evaluated. The derived ALS adhesives were used for gluing 2-layered veneer samples and particleboards. Differential Scanning Calorimetry showed a reduction of curing temperature and heat for the samples with crosslinkers. Light microscopy showed that the FOH crosslinked samples had thicker bondlines and higher penetration, which occurred mainly through vessels. Tensile shear strength values of 2-layered veneer samples glued with crosslinked ALS adhesives were at the same level as the melamine reinforced urea-formaldehyde (UmF) reference. For particleboards, the FOH crosslinked samples showed a significant decrease in mechanical properties (internal bond (IB), modulus of elasticity (MOE), modulus of rupture (MOR)) and thickness swelling. For pMDI crosslinked samples, these properties increased compared to the UmF. Although the FOH crosslinked ALS samples can be classified as non-added-formaldehyde adhesives, their emissions were higher than what can be expected to be sourced from the particles. 

Ort, förlag, år, upplaga, sidor
MDPI, 2019
Nyckelord
biorefinery lignin; wood panels; sustainable adhesives; adhesive penetration; particleboard properties; formaldehyde emissions
Nationell ämneskategori
Polymerteknologi
Forskningsämne
Teknik, Skog och träteknik
Identifikatorer
urn:nbn:se:lnu:diva-89556 (URN)10.3390/polym11101633 (DOI)000495382700102 ()31658588 (PubMedID)
Tillgänglig från: 2019-10-14 Skapad: 2019-10-14 Senast uppdaterad: 2019-11-21Bibliografiskt granskad
Hemmilä, V., Hosseinpourpia, R., Adamopoulos, S. & Eceiza, A. (2019). Characterization of Wood-based Industrial Biorefinery Lignosulfonates and Supercritical Water Hydrolysis Lignin. Waste and Biomass Valorization, 1-11
Öppna denna publikation i ny flik eller fönster >>Characterization of Wood-based Industrial Biorefinery Lignosulfonates and Supercritical Water Hydrolysis Lignin
2019 (Engelska)Ingår i: Waste and Biomass Valorization, ISSN 1877-2641, E-ISSN 1877-265X, s. 1-11Artikel i tidskrift (Refereegranskat) Epub ahead of print
Abstract [en]

Understanding the properties of any particular biorefinery or pulping residue lignin is crucial when choosing the right lignin for the right end use. In this paper, three different residual lignin types [supercritical water hydrolysis lignin (SCWH), ammonium lignosulfonate (A-LS), and sodium lignosulfonate (S-LS)] were evaluated for their chemical structure, thermal properties and water vapor adsorption behavior. SCWH lignin was found to have a high amount of phenolic hydroxyl groups and the highest amount of beta-O-4 linkages. Combined with a low ash content, it shows potential to be used for conversion into aromatic or platform chemicals. A-LS and S-LS had more aliphatic hydroxyl groups, aliphatic double bonds and C=O structures. All lignins had available C-3/C-5 positions, which can increase reactivity towards adhesive precursors. The glass transition temperature (T-g) data indicated that the SCWH and S-LS lignin types can be suitable for production of carbon fibers. Lignosulfonates exhibited considerable higher water vapor adsorption as compared to the SCWH lignin. In conclusion, this study demonstrated that the SCWH differed greatly from the lignosulfonates in purity, chemical structure, thermal stability and water sorption behavior. SCWH lignin showed great potential as raw material for aromatic compounds, carbon fibers, adhesives or polymers. Lignosulfonates are less suited for conversion into chemicals or carbon fibers, but due to the high amount of aliphatic hydroxyl groups, they can potentially be modified or used as adhesives, dispersants, or reinforcement material in polymers. For most value-adding applications, energy-intensive purification of the lignosulfonates would be required. [GRAPHICS] .

Ort, förlag, år, upplaga, sidor
Springer, 2019
Nyckelord
Ammonium lignosulfonate, Sodium lignosulfonate, Hydrolysis lignin, Phenolics, Aromatics
Nationell ämneskategori
Trävetenskap
Identifikatorer
urn:nbn:se:lnu:diva-90318 (URN)10.1007/s12649-019-00878-5 (DOI)000496201800001 ()
Tillgänglig från: 2019-11-29 Skapad: 2019-11-29 Senast uppdaterad: 2019-12-06
Kumar, A., Ryparová, P., Hosseinpourpia, R., Adamopoulos, S., Prošek, Z., Žigone, J. & Petrič, M. (2019). Hydrophobicity and resistance against microorganisms of heat and chemically crosslinked poly(vinyl alcohol) nanofibrous membranes. Chemical Engineering Journal, 360, 788-796
Öppna denna publikation i ny flik eller fönster >>Hydrophobicity and resistance against microorganisms of heat and chemically crosslinked poly(vinyl alcohol) nanofibrous membranes
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2019 (Engelska)Ingår i: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 360, s. 788-796Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Poly(vinyl alcohol) (PVA) is a water-soluble, semi-ionic and biocompatible polymer with excellent chemical and thermal stability. The chemical crosslinking of PVA membrane improve its stability towards humidity and water. In the present work, PVA nanofibrous membranes were fabricated using roller electrospinning techniques. The prepared membranes were crosslinked by heat treatment, glutaraldehyde dipping, and glutaraldehyde vapour. Furthermore, octadecyltrichlorosilane (OTS) treatment was used for hydrophobization of the crosslinked membranes. The prepared crosslinked membranes were analysed by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). The hydrophobization of PVA nanofibrous membranes were analysed by employing optical goniometer and auto-dynamic vapour sorption (AVS) techniques. Further, the PVA membranes were tested against algae and mould growth at in-vitro laboratory conditions. The SEM and FTIR results revealed significant differences in the morphology of the PVA nanofibrous membranes and in chemical bond formation due to crosslinking treatments. Water contact angle and AVS data confirmed a hydrophobization of PVA membranes by the treatments.

Ort, förlag, år, upplaga, sidor
Elsevier, 2019
Nationell ämneskategori
Polymerteknologi Annan materialteknik
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-79195 (URN)10.1016/j.cej.2018.12.029 (DOI)000460964000079 ()2-s2.0-85058096376 (Scopus ID)
Tillgänglig från: 2018-12-13 Skapad: 2018-12-13 Senast uppdaterad: 2019-08-29Bibliografiskt granskad
Hosseinpourpia, R., Adamopoulos, S., Mai, C. & Taghiyari, H. R. (2019). Properties of medium-density fibreboards bonded with dextrin-based wood adhesive. Wood research, 64(2), 185-194
Öppna denna publikation i ny flik eller fönster >>Properties of medium-density fibreboards bonded with dextrin-based wood adhesive
2019 (Engelska)Ingår i: Wood research, ISSN 1336-4561, Vol. 64, nr 2, s. 185-194Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This study focuses on manufacturing of medium density fibreboard (MDF) panels bonded with dextrin-based wood adhesive and crosslinked in situ with various weight ratios of synthetic (e.g., polymeric-methane diphenyl-diisocyanate, pMDI) or bio-based (e.g., glyoxal) crosslinkers. The physical and mechanical properties of the panels were evaluated and compared with those from panels without crosslinker (control). Modulus of rupture (MOR) and internal bond (IB) strength of the MDF panels were considerably increased by increasing the crosslinkers’ content. While, slight improvements were observed in modulus of elasticity (MOE) of the panels as a function of crosslinker type and content. Addition of crosslinkers clearly reduced the thickness swelling (TS) and water absorption (WA) of the panels, whereas, the panels with pMDI showed superior performances than the control and glyoxal added ones within 4 h and 24 h immersion in water. The results indicate the potential of dextrin as wood panel adhesive along with the use of appropriate crosslinkers.

Ort, förlag, år, upplaga, sidor
SDVÚ, 2019
Nyckelord
Crosslinker, dextrin adhesive, glyoxal, mechanical properties, pMDI, thickness swelling
Nationell ämneskategori
Kompositmaterial och -teknik Trävetenskap Polymerteknologi
Forskningsämne
Teknik, Skog och träteknik
Identifikatorer
urn:nbn:se:lnu:diva-82474 (URN)000467016100001 ()
Forskningsfinansiär
Vinnova, 2015-04825Familjen Kamprads stiftelse, 20160052
Tillgänglig från: 2019-05-08 Skapad: 2019-05-08 Senast uppdaterad: 2019-05-28Bibliografiskt granskad
Hosseinpourpia, R., Adamopoulos, S. & Eceiza, A. (2019). Thermal stability and water vapor sorption of wheat starch modified with isocyanate functional groups. In: 7th International Conference on Biobased and Biodegradable Polymers (BIOPOL), 17-19th June 2019, Stockholm, Sweden: . Paper presented at 7th International Conference on Biobased and Biodegradable Polymers (BIOPOL), 17-19th June 2019, Stockholm, Sweden. KTH
Öppna denna publikation i ny flik eller fönster >>Thermal stability and water vapor sorption of wheat starch modified with isocyanate functional groups
2019 (Engelska)Ingår i: 7th International Conference on Biobased and Biodegradable Polymers (BIOPOL), 17-19th June 2019, Stockholm, Sweden, KTH , 2019Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Wheat starch polymer was modified through the unequal reactivity of isocyanate groups in isophorone diisocyanate (IPDI) monomer. Fourier transform infrared spectroscopy (FTIR) and 13C nuclear magnetic resonance (13C NMR) confirmed the presence of both urethane and isocyanate functionalities in the modified polymer. Thermal stability and water vapor sorption properties of the modified polymer were evaluated by means of thermogravimetric analysis (TGA) and auto-dynamic vapor sorption (AVS) method, respectively. The results indicated that the modified starch polymer showed a better thermal stability (e.g. higher temperature at maximum weight loss) compared to the unmodified one. Water vapor sorption of starch polymer was considerably reduced after modification with IPDI monomer.

Ort, förlag, år, upplaga, sidor
KTH, 2019
Nationell ämneskategori
Textil-, gummi- och polymermaterial Polymerkemi
Forskningsämne
Teknik, Skog och träteknik
Identifikatorer
urn:nbn:se:lnu:diva-85788 (URN)
Konferens
7th International Conference on Biobased and Biodegradable Polymers (BIOPOL), 17-19th June 2019, Stockholm, Sweden
Projekt
Lantmännen project
Tillgänglig från: 2019-06-24 Skapad: 2019-06-24 Senast uppdaterad: 2019-08-28Bibliografiskt granskad
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.
Öppna denna publikation i ny flik eller fönster >>Utilization of different tall oils for improving the water resistance of cellulosic fibers
2019 (Engelska)Ingår i: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 136, nr 13, artikel-id 47303Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
Wiley-Blackwell, 2019
Nationell ämneskategori
Trävetenskap Kompositmaterial och -teknik Pappers-, massa- och fiberteknik Biomaterial Polymerkemi
Forskningsämne
Teknik, Skog och träteknik
Identifikatorer
urn:nbn:se:lnu:diva-78872 (URN)10.1002/app.47303 (DOI)000454418300034 ()2-s2.0-85056707222 (Scopus ID)
Forskningsfinansiär
Vinnova, 2015‐04825Familjen Kamprads stiftelse, 20160052
Tillgänglig från: 2018-11-19 Skapad: 2018-11-19 Senast uppdaterad: 2019-08-29Bibliografiskt granskad
Hosseinpourpia, R., Adamopoulos, S. & Mai, C. (2018). Analysis of the vapour sorption behaviour of wood modified with thermosetting resins with Hailwood-Horrobin and Excess Surface Work models. In: Spanic N.,Zupcic I. (Ed.), 29th International Conference on Wood Science and Technology, ICWST 2018: Implementation of Wood Science in Woodworking Sector - Proceedings: . Paper presented at 29th International Conference on Wood Science and Technology: Implementation of Wood Science in Woodworking Sector, ICWST 2018; Zagreb; Croatia; 6 -7 December 2018 (pp. 87-92). University of Zagreb
Öppna denna publikation i ny flik eller fönster >>Analysis of the vapour sorption behaviour of wood modified with thermosetting resins with Hailwood-Horrobin and Excess Surface Work models
2018 (Engelska)Ingår i: 29th International Conference on Wood Science and Technology, ICWST 2018: Implementation of Wood Science in Woodworking Sector - Proceedings / [ed] Spanic N.,Zupcic I., University of Zagreb , 2018, s. 87-92Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Wood modification is a well-known technology to enhance the dimensional stability of wood and the resistance to abiotic and biotic degradation. Impregnation modification of wood with thermosetting resins, such as melamine formaldehyde (MF) or phenol formaldehyde (PF), alters the material properties of wood through formation of a three-dimensional network within the cell wall. This work investigates the vapour sorption behaviour of Scots pine (Pinus sylvestris L.) micro-veneers modified with MF and PF resins by means of Hailwood-Horrobin (H-H) and excess surface work (ESW) models. The analysed sorption data indicated that the available sorption sites were increased in the modified samples compared to the unmodified controls due to an increase of the monolayer sorption. However, modification resulted in a considerable reduction of the multilayer sorption. This could be attributed to the formation of a rigid, three-dimensional corset within the cell wall formed by auto-polymerization reactions of resin monomers and oligomers, which is known to reduce the cell wall swell-ability upon water absorption.

Ort, förlag, år, upplaga, sidor
University of Zagreb, 2018
Nationell ämneskategori
Trävetenskap
Identifikatorer
urn:nbn:se:lnu:diva-79193 (URN)2-s2.0-85060389338 (Scopus ID)978-953-292-059-8 (ISBN)
Konferens
29th International Conference on Wood Science and Technology: Implementation of Wood Science in Woodworking Sector, ICWST 2018; Zagreb; Croatia; 6 -7 December 2018
Tillgänglig från: 2018-12-13 Skapad: 2018-12-13 Senast uppdaterad: 2019-05-27Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Effects of acid pre-treatments on the swelling and vapor sorption of thermally modified Scots pine (Pinus sylvestris L.) wood
2018 (Engelska)Ingår i: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 13, nr 1, s. 331-345Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
Raleigh, NC: North Carolina State University, 2018
Nationell ämneskategori
Trävetenskap Polymerkemi
Forskningsämne
Teknik, Skog och träteknik
Identifikatorer
urn:nbn:se:lnu:diva-68862 (URN)10.15376/biores.13.1.331-345 (DOI)000427790000027 ()2-s2.0-85041326359 (Scopus ID)
Tillgänglig från: 2017-11-20 Skapad: 2017-11-20 Senast uppdaterad: 2019-08-29Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Hydroxyl accessibility and dimensional changes of Scots pine sapwood affected by alterations in the cell wall ultrastructure during heattreatment
2018 (Engelska)Ingår i: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 152, s. 244-252Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
Elsevier, 2018
Nyckelord
Elemental analysis, Hydrogen-deuterium exchange, Mercury intrusion porosimetry, Thermal degradation, Water interactions, Wood
Nationell ämneskategori
Trävetenskap Textil-, gummi- och polymermaterial
Forskningsämne
Teknik, Skog och träteknik
Identifikatorer
urn:nbn:se:lnu:diva-74031 (URN)10.1016/j.polymdegradstab.2018.05.005 (DOI)000435059100023 ()2-s2.0-85046633955 (Scopus ID)
Tillgänglig från: 2018-05-09 Skapad: 2018-05-09 Senast uppdaterad: 2019-08-29Bibliografiskt granskad
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.
Öppna denna publikation i ny flik eller fönster >>Modification of Pea Starch and Dextrin Polymers with Isocyanate Functional Groups
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2018 (Engelska)Ingår i: Polymers, ISSN 2073-4360, E-ISSN 2073-4360, Vol. 10, nr 9, artikel-id 939Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
MDPI, 2018
Nationell ämneskategori
Polymerkemi Livsmedelsvetenskap Trävetenskap
Forskningsämne
Naturvetenskap, Livsmedelsvetenskap; Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-77435 (URN)10.3390/polym10090939 (DOI)000449988800008 ()2-s2.0-85052637771 (Scopus ID)
Forskningsfinansiär
Vinnova, 2015-04825
Tillgänglig från: 2018-08-28 Skapad: 2018-08-28 Senast uppdaterad: 2019-08-29Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0003-0883-2306

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