Molecular-level characterization of changes in the mechanical properties of wood in response to thermal treatment
Source abstract
Abstract
Abstract Thermal treatment can improve the dimensional stability of wood, but it also decreases wood’s stiffness and increases its brittleness. In this paper, combining FTIR spectroscopy and mechanical analysis was used to in-situ study the molecular-level responses to stresses and analyze mechanical interactions among components in thermally-treated wood. For both untreated and treated woods, the cellulose was the longitudinal tensile load-bearing component of wood, but the lignin participated in the load transfer in the fiber direction. Moreover, the FTIR results indicated that hemicellulose degradation, as the interface between cellulose and lignin, decreased shear slipping between microfibrils. The interfacial material degradation also caused the wood’s stiffness and mechanical responses of the matrix along the cell transverse direction decrease. Upon increasing the heat treatment intensity, the cellulose microfibrils rearranged along the cell axis, resulting in the ability of the cell wall to resist deformation and the wood’s stiffness being increased.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Wood Treatment and Properties · Natural Fiber Reinforced Composites · Lignin and Wood Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (54)
Show source-provided references
1. Adler DC, Buehler MJ (2013) Mesoscale mechanics of wood cell walls under axial strain. Soft Matter 9:7138–7144. https://doi.org/10.1039/c3sm50183c10.1039/c3sm50183c ↗
2. Åkerholm M, Salmén L (2001) Interactions between wood polymers studied by dynamic FTIR spectroscopy. Polymer 42:963–969. https://doi.org/10.1016/S0032-3861(00)00434-110.1016/S0032-3861(00)00434-1 ↗
3. Åkerholm M, Salmén L (2003) The oriented structure of lignin and its viscoelastic properties studied by static and dynamic FT-IR spectroscopy. Holzforschung 57:459–465. https://doi.org/10.1515/HF.2003.06910.1515/HF.2003.069 ↗
4. Alén R, Kotilainen R, Zaman A (2002) Thermochemical behavior of Norway spruce (Picea abies) at 180–225 °C. Wood Sci Technol 36:163–171. https://doi.org/10.1007/s00226-001-0133-110.1007/s00226-001-0133-1 ↗
5. Alexander LE (1969) X-ray diffraction methods in polymer science. Wiley, Amsterdam, pp 423–424
6. Andersson S, Serimaa R, Vaeaenaenen T, Paakkari T, Jaemsae S, Viitaniemi P (2005) X-ray scattering studies of thermally modified scots pine (Pinus sylvestris L.). Holzforschung 35:155–427. https://doi.org/10.1515/HF.2005.06910.1515/HF.2005.069 ↗
7. Arnold M (2010) Effect of moisture on the bending properties of thermally modified beech and spruce. J Mater Sci 45:669–680. https://doi.org/10.1007/s10853-009-3984-810.1007/s10853-009-3984-8 ↗
8. Bekhta P, Niemz P (2003) Effect of high temperature on the change in color, dimensional stability and mechanical properties of spruce wood. Holzforschung 57:539–546. https://doi.org/10.1515/HF.2003.08010.1515/HF.2003.080 ↗
9. Bergander A, Salmén L (2002) Cell wall properties and their effects on the mechanical properties of fibers. J Mater Sci 37:151–156. https://doi.org/10.1023/A:101311592567910.1023/A:1013115925679 ↗
10. Berglund J, Mikkelsen D, Flanagan BM, Dhital S, Vilaplana F (2020) Wood hemicellulose exert distinct biomechanical contributions to cellulose fibrillar networks. Nat Commun 11:4692. https://doi.org/10.1038/s41467-020-18390-z10.1038/s41467-020-18390-z ↗
11. Björn B, Cordt Z, Oliver F, Jörg F, Mathias G, Karsten D (2010) Micromechanics and ultrastructure of pyrolysed softwood cell walls. Acta Biomater 6:4345–4351. https://doi.org/10.1016/j.actbio.2010.05.02610.1016/j.actbio.2010.05.026 ↗
12. Candelier K, Thevenon MF, Petrissans A, Dumarcay S, Gerardin P, Petrissans M (2016) Control of wood thermal treatment and its effects on decay resistance: a review. Ann Forest Sci 73:571–583. https://doi.org/10.1007/s13595-016-0541-x10.1007/s13595-016-0541-x ↗
13. Cave ID (1966) Theory of X-ray measurement of microfibril angle in wood. For Prod J 16:37–43
14. Collier WE, Schultz TP, Kalasinsky VF (1992) Infrared study of lignin: reexamination of aryl-alkyl ether C-O stretching peak assignments. Holzforschung 46:523–528. https://doi.org/10.1515/hfsg.1992.46.6.52310.1515/hfsg.1992.46.6.523 ↗
15. Eichhorn SJ, Sirichaisit J, Young RJ (2001) Deformation mechanisms in cellulose fibres, paper and wood. J Mater Sci 36:3129–3135. https://doi.org/10.1023/A:101796991602010.1023/A:1017969916020 ↗
16. Faix O (1991) Classification of lignin from different botanical origins by FT-IR spectroscopy. Holzforschung 45:21–27. https://doi.org/10.1515/hfsg.1991.45.s1.2110.1515/hfsg.1991.45.s1.21 ↗
17. Guo J, Yin YF, Song KL, Yin YF (2015) Changes of wood cell walls in response to hygro-mechanical steam treatment. Carbohyd Polym 115:207–214. https://doi.org/10.1016/j.carbpol.2014.08.04010.1016/j.carbpol.2014.08.040 ↗
18. Guo J, Rennhofer H, Yin Y, Lichtenegger HC (2016) The influence of thermo-hygro-mechanical treatment on the micro- and nanoscale architecture of wood cell walls using small- and wide-angle x-ray scattering. Cellulose 23:2325–2340. https://doi.org/10.1007/s10570-016-0982-210.1007/s10570-016-0982-2 ↗
19. Hill CAS (2006) Thermal modification of wood. Hill CAS(ed) Wood modification: chemical, thermal and other processes. Wiley, NewYork, pp 99–12610.1002/0470021748.ch5 ↗
20. Hill C, Altgen M, Rautkari L (2021) Thermal modification of wood—a review: chemical changes and hygroscopicity. J Mater Sci 56:6581–6614. https://doi.org/10.1007/s10853-020-05722-z10.1007/s10853-020-05722-z ↗
21. Hinterstoisser B, Åkerholm M, Salmén L (2001) Effect of fiber orientation in dynamic FTIR study on native cellulose. Carbohyd Res 334:27–37. https://doi.org/10.1016/S0008-6215(01)00167-710.1016/S0008-6215(01)00167-7 ↗
22. Hinterstoisser B, Åkerholm M, Salmén L (2003) Load distribution in native cellulose. Biomacromol 4:1232–1237. https://doi.org/10.1021/bm030017k10.1021/bm030017k ↗
23. Hofstetter K, Hinterstoisser B, Salmén L (2006) Moisture uptake in native cellulose - the roles of different hydrogen bonds: a dynamic FT-IR study using deuterium exchange. Cellulose 13:131–145. https://doi.org/10.1007/s10570-006-9055-210.1007/s10570-006-9055-2 ↗
24. Hori R, Wada M (2005) The thermal expansion of wood cellulose crystals. Cellulose 12:479–484. https://doi.org/10.1007/s10570-005-5967-510.1007/s10570-005-5967-5 ↗
25. Hu K, Huang Y, Fei B, Yao C, Zhao C (2017) Investigation of the multilayered structure and microfibril angle of different types of bamboo cell walls at the micro/nano level using a LC-PolScope imaging system. Cellulose 24:4611–4625. https://doi.org/10.1007/s10570-017-1447-y10.1007/s10570-017-1447-y ↗
26. Hughes M, Hill C, Pfriem A (2015) The toughness of hygrothermally modified wood. Holzforschung 69:851–862. https://doi.org/10.1515/hf-2014-018410.1515/hf-2014-0184 ↗
27. Inagaki T, Siesler HW, Mitsui K, Tsuchikawa S (2010) Difference of the crystal structure of cellulose in wood after hydrothermal and aging degradation: a NIR spectroscopy and XRD study. Biomacromol 11:2300–2305. https://doi.org/10.1021/bm100403y10.1021/bm100403y ↗
28. Jarvis MC (2009) Plant cell walls: supramolecular assembly, signalling and stress. Struct Chem 20:245–253. https://doi.org/10.1007/s11224-009-9427-y10.1007/s11224-009-9427-y ↗
29. Kačíková D, Kačík F, Čabalová I, Ďurkovič J (2013) Effects of thermal treatment on chemical, mechanical and colour traits in Norway spruce wood. Bioresource Technol 144:669–674. https://doi.org/10.1016/j.biortech.2013.06.11010.1016/j.biortech.2013.06.110 ↗
30. Kim DY, Nishiyama Y, Wada M, Kuga S, Okano T (2001) Thermal decomposition of cellulose crystallites in wood. Holzforschung 55:521–524. https://doi.org/10.1515/HF.2001.08410.1515/HF.2001.084 ↗
31. Kretschmann D (2003) Nature materials: velcro mechanics in wood. Nat Mater 2:775. https://doi.org/10.1038/nmat102510.1038/nmat1025 ↗
32. Kubojima Y, Okano T, Ohta M (1998) Vibrational properties of Sitka spruce heat-treated in nitrogen gas. J Wood Sci 44:73–77. https://doi.org/10.1007/BF0052187810.1007/BF00521878 ↗
33. Lin BJ, Colin B, Chen WH, Petrissans A, Rousset P, Petrissans M (2018) Thermal degradation and compositional changes of wood treated in a semi-industrial scale reactor in vacuum. J Ana App Pyrol 130:8–18. https://doi.org/10.1016/j.jaap.2018.02.00510.1016/j.jaap.2018.02.005 ↗
34. Mastouri A, Efhamisisi D, Shirmohammadli Y, Oladi R (2021) Physicochemical properties of thermally treated poplar wood in silicone and rapeseed oils: a comparative study. J Build Eng 43:102511. https://doi.org/10.1016/j.jobe.2021.10251110.1016/j.jobe.2021.102511 ↗
35. Peng H, Salmén L, Jiang J, Lu J (2019) Contribution of lignin to the stress transfer in compression wood viewed by tensile FTIR loading. Holzforschung 74:459–467. https://doi.org/10.1515/hf-2019-020610.1515/hf-2019-0206 ↗
36. Rautkari L, Hill C (2014) Effect of initial moisture content on the anti-swelling efficiency of thermally modified scots pine sapwood treated in a high-pressure reactor under saturated steam. Holzforschung 68:323–326. https://doi.org/10.1515/hf-2013-007810.1515/hf-2013-0078 ↗
37. Salmén L, Bergström E (2009) Cellulose structural arrangement in relation to spectral changes in tensile loading FTIR. Cellulose 16:975–982. https://doi.org/10.1007/s10570-009-9331-z10.1007/s10570-009-9331-z ↗
38. Salmén L, Possler H, Stevanic JS, Stanzl-Tschegg SE (2008) Analysis of thermally treated wood samples using dynamic FT-IR-spectroscopy. Holzforschung 62:676–678. https://doi.org/10.1515/HF.2008.11310.1515/HF.2008.113 ↗
39. Salmén L, Stevanic JS, Olsson AM (2016) Contribution of lignin to the strength properties in wood fibres studied by dynamic FTIR spectroscopy and dynamic mechanical analysis (DMA). Holzforschung 70:1155–1163. https://doi.org/10.1515/hf-2016-005010.1515/hf-2016-0050 ↗
40. Sandberg D, Haller P, Navi P (2013) Thermo-hydro and thermo-hydro-mechanical wood processing: an opportunity for future environmentally friendly wood products. Wood Mater Sci Eng 8:64–88. https://doi.org/10.1080/17480272.2012.75193510.1080/17480272.2012.751935 ↗
41. Segal L, Creely JJ, Martin AE, Conrad CM (1959) An empirical method for estimating the degree of crystallinity of native cellulose using the X-ray diffractometer. Text Res J 29:786–794. https://doi.org/10.1177/00405175590290100310.1177/004051755902901003 ↗
42. Stevanic JS, Salmén L (2020) Molecular origin of mechano-sorptive creep in cellulosic fibres. Carbohyd Polym 230:115615. https://doi.org/10.1016/j.carbpol.2019.11561510.1016/j.carbpol.2019.115615 ↗
43. Tashiro K, Kobayashi M (1991) Theoretical evaluation of three-dimensional elastic constants of native and regenerated celluloses: role of hydrogen bonds. Polymer 32:1516–1526. https://doi.org/10.1016/0032-3861(91)90435-L10.1016/0032-3861(91)90435-L ↗
44. Tumen I, Aydemir D, Gunduz G, Uner B, Cetin H (2010) Changes in the chemical structure of thermally treated wood. Bioresources 5:1936–194410.15376/biores.5.3.1936-1944 ↗
45. Wang X, Deng Y, Wang S, Min C, Meng Y, Pham T, Ying Y (2014) Evaluation of the effects of compression combined with heat treatment by nanoindentation (NI) of poplar cell walls. Holzforschung 68:167–173. https://doi.org/10.1515/hf-2013-008410.1515/hf-2013-0084 ↗
46. Wang D, Lin L, Fu F (2020) Deformation mechanisms of wood cell walls under tensile loading: a comparative study of compression wood (CW) and normal wood (NW). Cellulose 27:4161–4172. https://doi.org/10.1007/s10570-020-03095-910.1007/s10570-020-03095-9 ↗
47. Wang X, Chen X, Xie X, Wu Y, Zhao L, Li Y, Wang S (2018) Effects of thermal modification on the physical, chemical and micromechanical properties of Masson pine wood (Pinus massoniana Lamb.). Holzforschung 72:1063–1070. https://doi.org/10.1515/hf-2017-020510.1515/hf-2017-0205 ↗
48. Widmann R, Fernandez-Cabo JL, Steiger R (2012) Mechanical properties of thermally modified beech timber for structural purposes. Eur J Wood Prod 70:775–784. https://doi.org/10.1007/s00107-012-0615-x10.1007/s00107-012-0615-x ↗
49. Wikberg H, Maunu SL (2004) Characterisation of thermally modified hard- and softwoods by 13C CPMAS NMR. Carbohyd Polym 58:461–466. https://doi.org/10.1016/j.carbpol.2004.08.00810.1016/j.carbpol.2004.08.008 ↗
50. Windeisen E, Bächle H, Zimmer B, Wegener G (2009) Relations between chemical changes and mechanical properties of thermally treated wood 10th EWLP, Stockholm, Sweden, August 25–28, 2008. Holzforschung 63:773–778. https://doi.org/10.1515/HF.2009.08410.1515/HF.2009.084 ↗
51. Wool RP (1981) Measurements of infrared frequency shifts in stressed polymers. J Polym Sci Pol Chem 19:449–457. https://doi.org/10.1002/pol.1981.18019030510.1002/pol.1981.180190305 ↗
52. Xing D, Li J, Wang X, Wang S (2016) In situ measurement of heat-treated wood cell wall at elevated temperature by nanoindentation. Ind Crop Prod 87:142–149. https://doi.org/10.1016/j.indcrop.2016.04.01710.1016/j.indcrop.2016.04.017 ↗
53. Yin J, Yuan T, Lu Y, Song K, Li H, Zhao G, Yin Y (2017) Effect of compression combined with steam treatment on the porosity, chemical compositon and cellulose crystalline structure of wood cell walls. Carbohyde Polym 155:163–172. https://doi.org/10.1016/j.carbpol.2016.08.01310.1016/j.carbpol.2016.08.013 ↗
54. Zollfrank C, Fromm J (2009) Ultrastructural development of the softwood cell wall during pyrolysis. Holzforschung 63:248–253. https://doi.org/10.1515/HF.2009.03110.1515/HF.2009.031 ↗