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Licensed Unlicensed Requires Authentication Published by De Gruyter February 5, 2018

Improved wood properties via two-step grafting with itaconic acid (IA) and nano-SiO2

  • Xiaoshuai Han , Yihui Yin , Qinqin Zhang , Ren Li and Junwen Pu EMAIL logo
From the journal Holzforschung


Itaconic acid (IA) with its trifunctional structure was first introduced into the wood cell lumen and cell wall, which functions as a grafting anchor for fixing various polymers via strong chemical bonds. Then nano-SiO2 was grafted to the IA-modified wood. Field-emission scanning electron microscope revealed that the grafting experiment was successful and that the modified cell wall thickness increased by 65%. The incorporated hydrophobic nano-SiO2 substructure reduced the wood’s hygroscopicity and improved its dimensional stability. The thermal stability of the new composite was also excellent. The presented approach is simple and efficient and the probability is high that it can be up-scaled to a level of a large-scale engineering material.


This work was sponsored by a special Fund from the Beijing Common Construction Project and the Beijing Forestry University, Grant no. 2016HXKFCLXY001.

  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.


Adebawo, F., Naithani, V., Sadeghifar, H., Tilotta, D., Lucia, L., Jameel, H., Ogunsanwo, O. (2016) Morphological and interfacial properties of chemically-modified tropical hardwood. RSC Adv. 6:6571–6576.10.1039/C5RA19409ASearch in Google Scholar

Andersson, S., Serimaa, R., Paakkari, T., Saranpää, P., Pesonen, E. (2003) Crystallinity of wood and the size of cellulose crystallites in Norway spruce (Picea abies). J. Wood Sci. 49:531–537.10.1007/s10086-003-0518-xSearch in Google Scholar

Bakar, B.F.A., Hiziroglu, S., Tahir, P.M. (2013) Properties of some thermally modified wood species. Materials Design. 43:348–355.10.1016/j.matdes.2012.06.054Search in Google Scholar

Beck, G., Strohbusch, S., Larnøy, E., Militz, H., Hill, C. (2017) Accessibility of hydroxyl groups in anhydride modified wood as measured by deuterium exchange and saponification. Holzforschung 72:17–23.10.1515/hf-2017-0059Search in Google Scholar

Bolton, A., Dinwoodie, J., Davies, D. (1988) The validity of the use of SEM/EDAX as a tool for the detection of UF resin penetration into wood cell walls in particleboard. Wood Sci. Technol. 22:345–356.10.1007/BF00353324Search in Google Scholar

Buchelt, B., Dietrich, T., Wagenführ, A. (2014) Testing of set recovery of unmodified and furfurylated densified wood by means of water storage and alternating climate tests. Holzforschung 68:23–28.10.1515/hf-2013-0049Search in Google Scholar

Cabane, E., Keplinger, T., Merk, V., Hass, P., Burgert, I. (2014) Renewable and functional wood materials by grafting polymerization within cell walls. ChemSusChem. 7:1020–1025.10.1002/cssc.201301107Search in Google Scholar PubMed

Chang, H., Tu, K., Wang, X., Liu, J. (2015) Fabrication of mechanically durable superhydrophobic wood surfaces using polydimethylsiloxane and silica nanoparticles. Rsc Adv. 5:30647–30653.10.1039/C5RA03070FSearch in Google Scholar

Chen, H., Lang, Q., Bi, Z., Miao, X., Li, Y., Pu, J. (2014) Impregnation of poplar wood (Populus euramericana) with methylolurea and sodium silicate sol and induction of in-situ gel polymerization by heating. Holzforschung 68:45–52.10.1515/hf-2013-0028Search in Google Scholar

Crosby, A.J., Lee, J.O. (2007) Polymer nanocomposites: the “Nano” effect on mechanical properties. Polym Rev. 47:217–229.10.1080/15583720701271278Search in Google Scholar

Cyr, P.-L., Riedl, B., Wang, X.-M., Shaler, S. (2006) Urea-melamine-formaldehyde (UMF) resin penetration in medium-density fiberboard (MDF) wood fibers. J. Adhes. Sci.Techn. 20:787–801.10.1163/156856106777638716Search in Google Scholar

Devi, R.R., Maji, T.K. (2012) Chemical modification of simul wood with styrene–acrylonitrile copolymer and organically modified nanoclay. Wood Sci. Techn. 46:299–315.10.1007/s00226-011-0406-2Search in Google Scholar

Dieste, A., Krause, A., Mai, C., Sèbe, G., Grelier, S., Militz, H. (2009) Modification of Fagus sylvatica L. with 1, 3-dimethylol-4, 5-dihydroxy ethylene urea (DMDHEU). Part 2: pore size distribution determined by differential scanning calorimetry. Holzforschung 63:89–93.10.1515/HF.2009.023Search in Google Scholar

Donath, S., Militz, H., Mai, C. (2004) Wood modification with alkoxysilanes. Wood Sci. Technol. 38:555–566.10.1007/s00226-004-0257-1Search in Google Scholar

Ermeydan, M.A., Cabane, E., Masic, A., Koetz, J., Burgert, I. (2012) Flavonoid insertion into cell walls improves wood properties. Acs Appl. Mat. Interfaces 4:5782.10.1021/am301266kSearch in Google Scholar PubMed

Ermeydan, M.A., Cabane, E., Gierlinger, N., Koetz, J., Burgert, I. (2014) Improvement of wood material properties via in situ polymerization of styrene into tosylated cell walls. RSC Adv. 4:12981–12988.10.1039/c4ra00741gSearch in Google Scholar

Gabrielli, C.P., Kamke, F.A. (2010) Phenol–formaldehyde impregnation of densified wood for improved dimensional stability. Wood Sci. Technol. 44:95–104.10.1007/s00226-009-0253-6Search in Google Scholar

Gao, L., Qiu, Z., Gan, W., Zhan, X., Li, J., Qiang, T. (2016) Negative oxygen ions production by superamphiphobic and antibacterial TiO2/Cu2O composite film anchored on wooden substrates. Sci Rep. 6:26055.10.1038/srep26055Search in Google Scholar PubMed PubMed Central

Gholamiyan, H., Tarmian, A., Ranjbar, Z., Abdulkhani, A., Azadfallah, M., Mai, C. (2016) Silane nanofilm formation by sol-gel processes for promoting adhesion of waterborne and solvent-borne coatings to wood surface. Holzforschung 70:429–437.10.1515/hf-2015-0072Search in Google Scholar

Gierlinger, N., Hansmann, C., Röder, T., Sixta, H., Gindl, W., Wimmer, R. (2005) Comparison of UV and confocal Raman microscopy to measure the melamine–formaldehyde resin content within cell walls of impregnated spruce wood. Holzforschung 59:210–213.10.1515/HF.2005.033Search in Google Scholar

Gilani, M.S., Zhao, S., Gaan, S., Koebel, M., Zimmermann, T. (2016) Design of a hierarchically structured hybrid material via in situ assembly of a silica aerogel into a wood cellular structure. RSC Adv 6:62825–62832.10.1039/C6RA12480ASearch in Google Scholar

Hauptmann, M., Gindl-Altmutter, W., Hansmann, C., Bacher, M., Rosenau, T., Liebner, F., D’Amico, S., Schwanninger, M. (2015) Wood modification with tricine. Holzforschung 69:985–991.10.1515/hf-2014-0122Search in Google Scholar

He, X., Xiao, Z., Feng, X., Sui, S., Wang, Q., Xie, Y. (2016) Modification of poplar wood with glucose crosslinked with citric acid and 1,3-dimethylol-4,5-dihydroxy ethyleneurea. Holzforschung 70:47–53.10.1515/hf-2014-0317Search in Google Scholar

Himmel, S., Mai, C. (2016) Water vapour sorption of wood modified by acetylation and formalisation – analysed by a sorption kinetics model and thermodynamic considerations. Holzforschung 70:203–213.10.1515/hf-2015-0015Search in Google Scholar

Huang, X., Kocaefe, D., Kocaefe, Y., Boluk, Y., Krause, C. (2013) Structural analysis of heat-treated birch (Betula papyrifera) surface during artificial weathering. Appl. Surface Sci. 264:117–127.10.1016/j.apsusc.2012.09.137Search in Google Scholar

Jia, S., Liu, M., Wu, Y., Luo, S., Yan, Q., Chen, H. (2016) Facile and scalable preparation of highly wear-resistance superhydrophobic surface on wood substrates using silica nanoparticles modified by VTES. Appl Surf Sci. 386:115–124.10.1016/j.apsusc.2016.06.004Search in Google Scholar

Kamke, F.A., Lee, J.N. (2007) Adhesive penetration in wood – a review. Wood Fiber Sci. 39:205–220.Search in Google Scholar

Kasemsiri, P., Hiziroglu, S., Rimdusit, S. (2012) Characterization of heat treated eastern redcedar (Juniperus virginiana L.). J. Mat. Process. Technol. 212:1324–1330.10.1016/j.jmatprotec.2011.12.019Search in Google Scholar

Konnerth, J., Harper, D., Lee, S.-H., Rials, T.G., Gindl, W. (2008) Adhesive penetration of wood cell walls investigated by scanning thermal microscopy (SThM). Holzforschung 62:91–98.10.1515/HF.2008.014Search in Google Scholar

Li, Y., Wu, Q., Li, J., Liu, Y., Wang, X.-M., Liu, Z. (2012) Improvement of dimensional stability of wood via combination treatment: swelling with maleic anhydride and grafting with glycidyl methacrylate and methyl methacrylate. Holzforschung 66:59–66.10.1515/HF.2011.123Search in Google Scholar

Liu, C., Wang, S., Shi, J., Wang, C. (2011) Fabrication of superhydrophobic wood surfaces via a solution-immersion process. Appl. Surface Sci. 258:761–765.10.1016/j.apsusc.2011.08.077Search in Google Scholar

Liu, F., Wang, S., Zhang, M., Ma, M., Wang, C., Li, J. (2013) Improvement of mechanical robustness of the superhydrophobic wood surface by coating PVA/SiO2 composite polymer. Appl. Surface Sci. 280:686–692.10.1016/j.apsusc.2013.05.043Search in Google Scholar

Lu, Y., Feng, M., Zhan, H. (2014) Preparation of SiO2 – wood composites by an ultrasonic-assisted sol-gel technique. Cellulose 21:4393–4403.10.1007/s10570-014-0437-6Search in Google Scholar

Mahltig, B., Swaboda, C., Roessler, A., Böttcher, H. (2008) Functionalising wood by nanosol application. J. Mat. Chem. 18:3180–3192.10.1039/b718903fSearch in Google Scholar

Mahr, M.S., Hübert, T., Stephan, I., Bücker, M., Militz, H. (2016) Reducing copper leaching from treated wood by sol-gel derived TiO2 and SiO2 depositions. Holzforschung 67:429–435.10.1515/hf-2012-0105Search in Google Scholar

Mai, C., Militz, H. (2004a) Modification of wood with silicon compounds. Inorganic silicon compounds and sol-gel systems: a review. Wood Sci.Technol. 37:339–348.10.1007/s00226-003-0205-5Search in Google Scholar

Mai, C., Militz, H. (2004b) Modification of wood with silicon compounds. Treatment systems based on organic silicon compounds – a review. Wood Sci. Technol. 37:453–461.10.1007/s00226-004-0225-9Search in Google Scholar

Miyafuji, H., Saka, S. (2001) Na2O-SiO2 wood-inorganic composites prepared by the sol-gel process and their fire-resistant properties. J. Wood Sci. 47:483–489.10.1007/BF00767902Search in Google Scholar

Miyafuji, H., Saka, S., Yamamoto, A. (1998) SiO2-P2O5-B2O3 wood-inorganic composites prepared by metal alkoxide oligomers and their fire-resisting properties. Holzforschung 52:410–416.10.1515/hfsg.1998.52.4.410Search in Google Scholar

Moghaddam, M., Wålinder, M.E.P., Claesson, P.M., Swerin, A. (2016) Wettability and swelling of acetylated and furfurylated wood analyzed by multicycle Wilhelmy plate method. Holzforschung 70:69–77.10.1515/hf-2014-0196Search in Google Scholar

Rapp, A., Bestgen, H., Adam, W., Peek, R.-D. (1999) Electron energy loss spectroscopy (EELS) for quantification of cell-wall penetration of a melamine resin. Holzforschung 53:111–117.10.1515/HF.1999.018Search in Google Scholar

Saka, S., Ueno, T. (1997) Several SiO2 wood-inorganic composites and their fire-resisting properties. Wood Sci. Technol. 31:457–466.10.1007/BF00702568Search in Google Scholar

Saka, S., Sasaki, M., Tanahashi, M. (1992) Wood-inorganic composites prepared by sol-gel processing, 1: Wood-inorganic composites with porous structure. Mokuzai Gakkaishi 38:1043–1049.Search in Google Scholar

Shi, J., Li, J., Zhou, W., Zhang, D. (2007) Improvement of wood properties by urea-formaldehyde resin and nano-SiO2. Front For China 2:104–109.10.1007/s11461-007-0017-0Search in Google Scholar

Thygesen, L.G., Tang E.E., Hoffmeyer, P. (2010). Water sorption in wood and modified wood at high values of relative humidity. Part I: results for untreated, acetylated, and furfurylated Norway spruce. Holzforschung 64:315–323.10.1515/hf.2010.044Search in Google Scholar

Tshabalala, M.A., Libert, R., Schaller, C.M. (2011) Photostability and moisture uptake properties of wood veneers coated with a combination of thin sol-gel films and light stabilizers. Holzforschung 65:215–220.10.1515/hf.2011.022Search in Google Scholar

Xing, C., Riedl, B., Cloutier, A., Shaler, S.M. (2005) Characterization of urea–formaldehyde resin penetration into medium density fiberboard fibers. Wood Sci. Technol. 39:374–384.10.1007/s00226-005-0294-4Search in Google Scholar

Zhang, Y., Zhang, S.Y., Yang, D.Q., Wan, H. (2006) Dimensional stability of wood andashpolymer composites. J. Appl. Polymer Sci. 102:5085–5094.10.1002/app.23581Search in Google Scholar

Received: 2017-7-26
Accepted: 2018-1-5
Published Online: 2018-2-5
Published in Print: 2018-6-27

©2018 Walter de Gruyter GmbH, Berlin/Boston

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