Chinese Journal of Magnetic Resonance >

2015 , Vol. 32 >Issue 4: 670 - 677

DOI: https://doi.org/10.11938/cjmr20150412

Bound Water Content in Saturated Wood Cell Wall Determined by Nuclear Magnetic Resonance Spectroscopy

  • GAO Xin ,
  • ZHUANG Shou-zeng*
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  • College of Material Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
*Corresponding author： ZHUANG Shou-zeng, Tel: +86-25-85427058, E-mail: szzhuang@njfu.edu.cn.

Received date: 2015-04-20

  Revised date: 2015-10-22

  Online published: 2015-12-05

Supported by

国家自然科学基金资助项目(30771677)，江苏省研究生培养创新工程资助项目(CXZZ13_0543)

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Abstract

1H spin-spin relaxation time (T2) of water in 5 species of wood was measured by nuclear magnetic resonance (NMR) spectroscopy at room temperature and -3℃, which is thought to be related to the anatomical structure of the wood. The bound water content within swollen cell wall was determined by comparison of the inversion peak area before and after frozen treatment: Pinus sylvestris 38.3%, Cunninghamia lanceolata 38.5%, Populus sp. 36.0%, Fraxinus excelsior L. 35.6% and Ochroma pyramidale 47.6%. The bound water contents determined by NMR spectroscopy were apparently higher than those obtained by the conventional extrapolation methods, but similar to the results obtained by the solute exclusion method, porous plate method, centrifugal dewatering method. It is concluded that NMR may provide a rapid and non-destructive way to determine bound water content in wood.

Key words： nuclear magnetic resonance(NMR); bound water content; spin-spin relaxation time; wood; cell wall

Cite this article

GAO Xin , ZHUANG Shou-zeng* . Bound Water Content in Saturated Wood Cell Wall Determined by Nuclear Magnetic Resonance Spectroscopy
[J]. Chinese Journal of Magnetic Resonance, 2015 , 32(4) : 670 -677 . DOI: 10.11938/cjmr20150412

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