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Influence of hygrothermal condition on dynamic viscoelasticity of Chinese fir (Cunninghamia lanceolata). Part 2: moisture desorption

  • Tianyi Zhan , Jiali Jiang , Jianxiong Lu EMAIL logo , Yaoli Zhang and Jianmin Chang
From the journal Holzforschung


The influence of hygrothermal condition on dynamic viscoelasticity of Chinese fir (Cunninghamia lanceolata) during the moisture desorption (MDes) process was investigated. The ambient hygrothermal environments were set up as a series of constant temperatures and two relative humidity (RH) modes (RHramp-down and RHisohume). The MDes provided space for the rearrangement of the hydrogen bonds (Re-HB) and caused a mechano-sorptive (MS) effect. The enhancement of the Re-HB effect negatively correlated with the increment of loss modulus, while the elevation of the MS and the heating effects intensified the loss modulus. Lower values of RHc, determining the plateau area of loss modulus, were obtained at higher temperatures or greater RH ramping rates. The residual instability in the wood cell wall was quantitatively characterized by the extent of the MS effect. Residual instability was inversely proportional to the RHisohume level during the MDes process. The study of time dependent viscoelastic properties under moisture changing process provided insight into the condition of adsorbed water in the cell wall and optimized the manufacturing technique involved in the thermo-hygro-mechanical treatment of wood.


This work was financially supported by the National Natural Science Foundation of China, Funder Id: 10.13039/501100001809, (No. 31700487), the Natural Science Foundation of Jiangsu Province (CN) (No. BK20170926), the Innovation Fund for Young Scholars of Nanjing Forestry University (CX2017002), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Employment or leadership: None declared.

  4. Honorarium: None declared.


Bonnet, M., Courtier-Murias, D., Faure, P., Rodts, S., Care, S. (2017) NMR determination of sorption isotherms in earlywood and latewood of Douglas fir. Identification of bound water components related to their local environment. Holzforschung 71:481–490.10.1515/hf-2016-0152Search in Google Scholar

Engelund, E.T., Salmén, L. (2012) Tensile creep and recovery of Norway spruce influenced by temperature and moisture. Holzforschung 66:959–965.10.1515/hf-2011-0172Search in Google Scholar

Engelund, E.T., Thygesen, L.G. Svensson, S., Hill C.A.S. (2013) A critical discussion of the physics of wood-water interactions. Wood Sci. Technol. 47:141–161.10.1007/s00226-012-0514-7Search in Google Scholar

Hunt, D., Gril, J. (1996) Evidence of a physical ageing phenomenon in wood. J. Mater. Sci. Lett. 15:80–82.10.1007/BF01855620Search in Google Scholar

Ishimaru, Y., Arai, K., Mizutani, M., Oshima, K., Iida, I. (2001) Physical and mechanical properties of wood after moisture conditioning. J. Wood Sci. 47:185–191.10.1007/BF01171220Search in Google Scholar

Jiang, J., Lu, J., Zhao, Y., Wu, Y. (2010) Influence of frequency on wood viscoelasticity under two types of heating conditions. Drying Technol. 28:823–829.10.1080/07373937.2010.485084Search in Google Scholar

Li, W., Van den Bulcke J., Dhaene, J., Zhan, X., Mei, C., Van Acker, J. (2018) Investigating the interaction between internal structural changes and water sorption of MDF and OSB using X-ray computed tomography. Wood Sci. Technol. doi:10.1007/s00226-018-0992-3.10.1007/s00226-018-0992-3Search in Google Scholar

Pearson, H., Ormarsson, S., Gabbitas, B. (2015) Nonlinear tensile creep behavior of radiata pine at elevated temperatures and different moisture contents. Holzforschung 69:915–923.10.1515/hf-2014-0240Search in Google Scholar

Pekka, T., Mark, H. (2016) The effect of temperature and moisture content on the fracture behaviour of spruce and birch. Holzforschung 70:369–376.10.1515/hf-2015-0017Search in Google Scholar

Siau, J.F. Wood: Influence of Moisture on Physical Properties. Department of Wood Science and Forest Products, Virginia Polytechnic Institute and State University, Blacksburg, 1995.Search in Google Scholar

Skaar, C. Wood-Water Relations. Springer-Verlag, New York, 1988.10.1007/978-3-642-73683-4Search in Google Scholar

Takahashi, C., Ishimaru, Y., Iida, I., Furuta, Y. (2004) The creep of wood destabilized by change in moisture content. Part 1: the creep behaviors of wood during and immediately after drying. Holzforschung 58:261–267.10.1515/HF.2004.040Search in Google Scholar

Takahashi, C., Ishimaru, Y., Iida, I., Furuta, Y. (2005) The creep of wood destabilized by change in moisture content. Part 2: the creep behaviors of wood during and immediately after adsorption. Holzforschung 59:46–53.10.1515/HF.2005.008Search in Google Scholar

Wim, W. (2015) A critical review of the multilayer sorption models and comparison with the sorption site occupancy (SSO) model for wood moisture sorption isotherm analysis. Holzforschung 69:67–76.10.1515/hf-2014-0069Search in Google Scholar

Wim, W. (2016) Equilibrium thermodynamics of wood moisture revisited: presentation of a simplified theory. Holzforschung 70:963–970.10.1515/hf-2015-0251Search in Google Scholar

Zhan, T., Jiang, J., Peng, H., Lu, J. (2016a) Dynamic viscoelastic properties of Chinese fir (Cunninghamia lanceolata) during moisture desorption processes. Holzforschung 70:547–555.10.1515/hf-2015-0183Search in Google Scholar

Zhan, T., Lu, J., Jiang, J., Peng, H., Li, A., Chang, J. (2016b) Viscoelastic properties of the Chinese fir (Cunninghamia lanceolata) during moisture sorption processes determined by harmonic test. Materials (Basel). 9:1020.10.3390/ma9121020Search in Google Scholar PubMed PubMed Central

Zhan, T., Lu, J, Jiang, J., Chang, J. (2018) Influence of hygrothermal condition on dynamic viscoelasticity of Chinese fir (Cunninghamia lanceolata). Part 1: moisture adsorption. Holzforschung 72:567–578.10.1515/hf-2017-0129Search in Google Scholar

Zhang, X., Hu, H., Guo, M. (2015) Relaxation of a hydrophilic polymer induced by moisture desorption through the glass transition. Phys. Chem. Chem. Phys. 17:3186–3195.10.1039/C4CP04966GSearch in Google Scholar PubMed

Supplementary Material:

The online version of this article offers supplementary material (

Received: 2017-08-22
Accepted: 2018-03-05
Published Online: 2018-04-06
Published in Print: 2018-07-26

©2018 Walter de Gruyter GmbH, Berlin/Boston

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