中文

Journal of Shanghai University（Natural Science Edition） ›› 2025, Vol. 31 ›› Issue (5): 860-871.doi: 10.12066/j.issn.1007-2861.2703

• Materials Science • Previous Articles    

A new cyclic immersion method for the conservation of waterlogged wood

XU Qingmeng1,2,3, ZHU Jinmeng4, DONG Wenqiang4, LUO Hongjie2,3   

  1. 1. Shanghai University of Medicine & Health Sciences A±liated Zhoupu Hospital, Shanghai 201318, China;
    2. Institute for the Conservation of Cultural Heritage, Shanghai University, Shanghai 200444, China;
    3. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
    4. Key Laboratory of Archaeological Exploration and Cultural Heritage Conservation Technology, Northwestern Polytechnical University, Xi'an 710129, China
  • Received:2025-06-17 Published:2025-11-12

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Abstract: A new cyclic immersion method (CIM) is developed to enhance the penetration efficiency of conservation materials into waterlogged wood. CIM involves the controlled dehydration of wood followed by immersion into a conservation material, with the cycle repeated to enhance penetration. Three conservation materials, commonly used polyethylene glycol (PEG), natural particulate cellulose nanocrystal (CNC) and water-soluble chitooligosaccharide (COS), are tested. CIM's effectiveness is assessed through visual morphology, weight percent gain, volume shrinkage and color change, combined with X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and derivative thermogravimetry (DTG) analyses. Results show CIM significantly enhances material penetration, especially for PEG, which achieved a 102% weight gain, more than double that of TSM, with minimal shrinkage and an acceptable color change. CIM might promotes the formation of hydrogen bonds between conservation materials and wood, offering an efficient method for conservation material penetration.

Key words: cyclic immersion method, waterlogged wood, polyethylene glycol, cellulose nanocrystal, chitooligosaccharide

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