Abstract
The properties of materials are presented, which are resulting from a combined inorganic-organic modification of wood with phenyltrimethoxysilane or phenyltriethoxysilane in a simple one-step impregnation treatment. The permanent swelling of the wood showed that the precursors entered the cell walls. The inclusion of phenyl groups, manifest by nuclear magnetic resonance spectroscopy, made the resulting wood composites highly hydrophobic, as evidenced by their low wettability and antishrink efficiencies of up to 44%. Impedance spectroscopy indicated that wood methylol groups took part in the condensation reactions with hydrated siloxanes, contributing to the high hydrophobicity and making the added phase resistant to leaching. The composites exhibited high weight percentage gains of up to 52% and ash contents up to 19%. The thermal properties of precursor solutions and products were assessed by differential scanning calorimetry and thermogravimetric analysis and compared with the more common silica precursor, tetraethyl orthosilicate.
This work was performed as part of Project IX “Hierarchically structured porous ceramics and composites from nanocasting of plant cell walls” in the framework of the priority programme SPP1420 of the Deutsche Forschungsgemeinschaft (German Research Foundation). The grant of our project and the financial aid allocated to our work through SPP1420 is gratefully acknowledged.
References
Aaserud, J., Larnøy, E., Glomm, W. Alternative systems for wood preservation, based on treatment with silanes. In: Proceedings of the 5th meeting of the Nordic-Baltic Network in Wood Material Science and Engineering (WSE), October 1-2, 2009, Copenhagen, Denmark, 2009.Search in Google Scholar
Alam, T., Henry, M. (2000) Empirical calculations of 29Si NMR chemical shielding tensors: a partial charge model investigation of hydrolysis in organically modified alkoxy silanes. Phys. Chem. Chem. Phys. 2:23–28.10.1039/a906445aSearch in Google Scholar
Allan, G.G., Carroll, J.P., Negri, A.R., Raghuraman, M., Ritzenhtaler, P., Yahiaoui, A. (1992) The microporosity of pulp: the precipitation of inorganic fillers within the micropores of the cell wall. Tappi 75:175–178.Search in Google Scholar
Assink, R.A., Kay, B.D. (1993) The chemical kinetics of silicate sol-gels: functional group kinetics of tetraethoxysilane. Coll. Surf. A 74:1–5.10.1016/0927-7757(93)80392-RSearch in Google Scholar
Attard, P., Antelmi, D., Larson, I. (2000) Comparison of the zeta potential with the diffuse layer potential from charge titration. Langmuir 16:1542–1552.10.1021/la990487tSearch in Google Scholar
Beall, F.C. (1971) Differential calometric analysis of wood and wood components. Wood Sci. Technol. 5:159–175.Search in Google Scholar
Bernards, T.N.M., Van Bommel, M.J., Boonstra, A.H. (1991) Hydrolysis-condensation processes of the tetra-alkoxysilanes TPOS, TEOS and TMOS in some alcoholic solvents. J. Non-Cryst. Sol. 134:1–13.Search in Google Scholar
Brindle, R., Albert, K., Morgan, E.D., Martin, P., Wilson, I.D. (1995) Solid state NMR and extraction studies on “phenyl”-bonded stationary phases used for solid phase extraction. J. Pharm. Biomed. Anal. 13:1305–1312.Search in Google Scholar
Brinker, C.J., Scherer, G.W. Sol-gel science. Academic Press, London, 1990.Search in Google Scholar
Brunet, F. (1998) Polymerization reactions in methyltriethoxysilane studied through 29Si NMR with polarization transfer. J. Non-Cryst. Sol. 231:58–77.Search in Google Scholar
Burgert, I., Eder, M., Gierlinger, N., Fratzl, P. (2007) Tensile and compressive stresses in tracheids are induced by swelling based on geometrical constraints of the wood cell. Planta 226:981–987.10.1007/s00425-007-0544-9Search in Google Scholar
Castellano, M., Gandini, A. (2004) Modification of cellulose fibres with organosilanes: under what conditions does coupling occur? J. Coll. Interf. Sci. 273:505–511.Search in Google Scholar
Cole, K.S., Cole, R.H. (1941) Dispersion and absorption in dielectrics I. Alternating current characteristics. J. Chem. Phys. 9:341–351.Search in Google Scholar
Cookson, L.J., Scown, D.K., McCarthy, K.J., Chew, N. (2007) The effectiveness of silica treatments against wood-boring invertebrates. Holzforschung 61:326–332.10.1515/HF.2007.045Search in Google Scholar
Donath, S., Militz, H., Mai, C. (2004) Wood modification with alkoxysilanes. Wood Sci. Technol. 38:555–566.Search in Google Scholar
Einfeldt, J., Kwasniewski, A., Klemm, D., Dicke, R., Einfeldt, L. (2000) Analysis of side group motion in O-acetyl-starch using regioselective 2-O-acetyl-starches by means of dielectric spectroscopy. Polymer 41:9273–9281.10.1016/S0032-3861(00)00305-0Search in Google Scholar
Einfeldt, J., Meißner, D., Kwasniewski, A. (2001) Polymerdynamics of cellulose and other polysaccharides in solid state-secondary dielectric relaxation processes. Prog. Polym. Sci. 26:1419–1472.Search in Google Scholar
Elvy, S., Dennis, G., Ng, L. (1995) Effects of coupling agent on the physical properties of wood-polymer composites. J. Mater. Proc. Technol. 35:3417–3419.Search in Google Scholar
Engelund, E.E.T., Thygesen, L.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.Search in Google Scholar
Fahlén, J., Salmén, L., Fahlen, J., Salmen, L. (2005) Pore and matrix distribution in the fiber wall revealed by atomic force microscopy and image analysis. Biomacromolecules 6:433–438.10.1021/bm040068xSearch in Google Scholar PubMed
Fritz-Popovski, G., Opdenbosch, D., Zollfrank, C., Aichmayer, B., Paris, O., Van Opdenbosch, D. (2013) Development of the fibrillar and microfibrillar structure during biomimetic mineralization of wood. Adv. Funct. Mater. 23:1265–1272.Search in Google Scholar
Fu, Y., Zhao, G. (2007) Dielectric properties of silicon dioxide/wood composite. Wood Sci. Technol. 41:511–522.Search in Google Scholar
Hook, R. (1996) A 29Si NMR study of the sol-gel polymerisation rates of substituted ethoxysilanes. J. Non-Cryst. Sol. 195:1–15.Search in Google Scholar
Ishida, Y., Yōshino, M., Takayanagi, M., Irie, F. (1959) Dielectric studies on cellulose fibers. J. Appl. Polym. Sci. 1:227–235.Search in Google Scholar
Jacobasch, H., Bauböck, G., Schurz, J. (1985) Problems and results of zeta-potential measurements on fibers. Coll. Polym. Sci. 24:3–24.Search in Google Scholar
Jermouni, T., Smaihi, M., Hovnanian, N. (1995) Hydrolysis and initial polycondensation of phenyltrimethoxysilane and diphenyldimethoxysilane. J. Mater. Chem. 5:1203–1208.Search in Google Scholar
Jinzhen, C., Guangjie, Z. (2002) Dielectric relaxation based on adsorbed water in wood cell wall under non-equilibrium state. Part 3. Desorption. Holzforschung 56:655–662.10.1515/HF.2002.099Search in Google Scholar
Jitianu, A., Britchi, A., Deleanu, C., Badescu, V., Zaharescu, M. (2003) Comparative study of the sol-gel processes starting with different substituted Si-alkoxides. J. Non-Cryst. Sol. 319:263–279.Search in Google Scholar
Johns, I.B., McElhill, E.A., Smith, J.O. (1962) Thermal stability of some organic compounds. J. Chem. Eng. Data 7:277–281.10.1021/je60013a036Search in Google Scholar
Kirkwood, J.G., Fuoss, R.M. (1941) Anomalous dispersion and dielectric loss in polar polymers. J. Chem. Phys. 9:329–340.Search in Google Scholar
Kuniyoshi, M., Takahashi, M., Tokuda, Y., Yoko, T. (2006) Hydrolysis and polycondensation of acid-catalyzed phenyltriethoxysilane (PhTES). J. Sol-Gel Sci. Technol. 39:175–183.Search in Google Scholar
Liepiņš, E., Zicmane, I., Lukevics, E. (1986) A multinuclear NMR spectroscopy study of alkoxysilanes. J. Organomet. Chem. 306:167–182.Search in Google Scholar
Loos, W. (1968) Dimensional stability of wood-plastic combinations to moisture changes. Wood Sci. Technol. 2:308–312.Search in Google Scholar
Mahltig, B., Swaboda, C., Roessler, A., Böttcher, H. (2008) Functionalising wood by nanosol application. J. Mater. Chem. 18:3180–3192.Search in Google Scholar
Mao, J., Holtman, K.M., Scott, J.T., Kadla, J.F., Schmidt-Rohr, K. (2006) Differences between lignin in unprocessed wood, milled wood, mutant wood, and extracted lignin detected by 13C solid-state NMR. J. Agric. Food Chem. 54:9677–9686.10.1021/jf062199qSearch in Google Scholar PubMed
Miyafuji, B.H., Saka, S., Yamamoto, A., Miyafuji, H. (1998) 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
Miyafuji, H., Kokaji, H., Saka, S. (2004) Photostable wood-inorganic composites prepared by the sol-gel process with UV absorbent. J. Wood Sci. 50:130–135.10.1007/s10086-003-0550-xSearch in Google Scholar
Mohammed-Ziegler, I., Tanczos, I., Horvolgyi, Z., Agoston, B. (2008) Water-repellent acylated and silylated wood samples and their surface analytical characterization. Coll. Surf. A 319:204–212.Search in Google Scholar
Norimoto, M. (1976) Dielectric properties of wood. Wood Res. 59:106–152.Search in Google Scholar
Norimoto, M., Yamada, T. (1972) The dielectric properties of wood VI: on the dielectric properties of the chemical constituents of wood and the dielectric anisotropy of wood. Wood Res. Bull. Wood Res. Inst. Kyoto Univ. 52:31–43.Search in Google Scholar
Pickering, K., Abdalla, A., Ji, C. (2003) The effect of silane coupling agents on radiata pine fibre for use in thermoplastic matrix composites. Compos. A 34:915–926.Search in Google Scholar
Podgorski, L., Chevet, B., Onic, L., Merlin, A. (2000) Modification of wood wettability by plasma and corona treatments. Int. J. Adhes. Adhes. 20:103–111.10.1016/S0143-7496(99)00043-3Search in Google Scholar
Pétrissans, M., Gérardin, P., Serraj, M. (2003) Wettability of heat-treated wood. Holzforschung 57:301–307.10.1515/HF.2003.045Search in Google Scholar
Rao, A.V., Kalesh, R.R., Pajonk, G.M. (2003) Hydrophobicity and physical properties of TEOS based silica aerogels using phenyltriethoxysilane as a synthesis component. J. Mater. Sci. 8:4407–4413.Search in Google Scholar
Rowell, R., Ellis, W. (1978) Determination of dimensional stabilization of wood using the water-soak method. Wood Fiber Sci. 10:104–111.Search in Google Scholar
Rowell, R.M., Gutzmer, D., Sachs, I., Kinney, R. (1976) Effects of alkylene oxide treatments on dimensional stability of wood. Wood Sci. 9:14–194.Search in Google Scholar
Rozman, H.D., Kumar, R.N., Abusamah, A. (1995) Rubberwood-polymer composites based on diallyl phthalate and methyl methacrylate. J. Appl. Polym. Sci. 57:1291–1297.Search in Google Scholar
Rösch, L., John, P., Reitmeier, R. (2000) Silicon compounds, organic. In: Ullmann’s Encyclopedia of Industrial Chemistry. Wiley-VCH, Weinheim. pp. 637–674.10.1002/14356007.a24_021Search in Google Scholar
Saka, S., Ueno, T. (1997) Several SiO2 wood-inorganic composites and their fire-resisting properties. Wood Sci. Technol. 31:457–466.Search in Google Scholar
Saka, S., Sasaki, M., Tanahashi, M. (1992) Wood-inorganic composites prepared by sol-gel processing. I. Wood-inorganic composites with porous structure. Mokuzai Gakkaishi 38:1043–1049.Search in Google Scholar
Salon, M.-C.B., Gerbaud, G., Abdelmouleh, M., Bruzzese, C., Boufi, S., Belgacem, M.N. (2007) Studies of interactions between silane coupling agents and cellulose fibers with liquid and solid-state NMR. Magn. Reson. Chem. 45:473–483.Search in Google Scholar
Sanchez, J., Rankin, S.E., McCormick, A.V. (1996) 29Si NMR kinetic study of tetraethoxysilane and ethyl-substituted ethoxysilane polymerization in acidic conditions. Ind. Eng. Chem. Res. 35:117–129.Search in Google Scholar
Seidman, R., Mason, S.G. (1954) Dielectric relaxation in cellulose containing sorbed vapors. Can. J. Chem. 32:744–762.Search in Google Scholar
Stamm, A.A.J., Hansen, L., Seborg, R.M. (1936) Minimizing wood shrinkage and swelling. Ind. Eng. Chem. 28:1164–1169.Search in Google Scholar
Stark, N.M., Matuana, L.M. (2007) Characterization of weathered wood–plastic composite surfaces using FTIR spectroscopy, contact angle, and XPS. Polym. Degrad. Stabil. 92:1883–1890.10.1016/j.polymdegradstab.2007.06.017Search in Google Scholar
Sugahara, Y., Inoue, T., Kuroda, K. (1997) 29Si NMR study on co-hydrolysis processes in Si(OEt)4-RSi(OEt)3-EtOH-water-HCl systems (R=Me, Ph): effect of R-groups. J. Mater. Chem. 7:53–59.Search in Google Scholar
Sugimoto, H., Takazawa, R., Norimoto, M. (2005) Dielectric relaxation due to heterogeneous structure in moist wood. J. Wood Sci. 51:549–553.10.1007/s10086-004-0688-1Search in Google Scholar
Sugiyama, M., Norimoto, M. (2006) Dielectric relaxation of water adsorbed on chemically treated woods. Holzforschung 60:549–557.10.1515/HF.2006.091Search in Google Scholar
Sun, X., Xu, Y., Jiang, D., Yang, D., Wu, D., Sun, Y., Yang, Y., Yuan, H., Deng, F. (2006) Study on the ammonia-catalyzed hydrolysis kinetics of single phenyltriethoxysilane and mixed phenyltriethoxysilane/tetraethoxysilane systems by liquid-state 29Si NMR. Coll. Surf. A 289:149–157.10.1016/j.colsurfa.2006.04.024Search in Google Scholar
Sèbe, G., De Jéso, B. (2000) The dimensional stabilisation of maritime pine sapwood (Pinus pinaster) by chemical reaction with organosilicon compounds. Holzforschung 54:474–480.10.1515/HF.2000.080Search in Google Scholar
Tanno, B.F., Saka, S., Yamamoto, A., Takabe, K. (1998) Antimicrobial TMSAH-added wood-inorganic composites prepared by the sol-gel process. Holzforschung 52:365–370.10.1515/hfsg.1998.52.4.365Search in Google Scholar
Taylor, C., Aloisio, C. (1985) Mechanical relaxation of flame retardant polycarbonate using the Cole-Cole method. Polym. Eng. Sci. 25:105–112.Search in Google Scholar
Temiz, A., Terziev, N., Jacobsen, B., Eikenes, M. (2006) Weathering, water absorption, and durability of silicon, acetylated, and heat-treated wood. J. Appl. Polym. Sci. 102:4506–4513.Search in Google Scholar
Tingaut, P., Weigenand, O., Mai, C., Militz, H., Sèbe, G. (2006) Chemical reaction of alkoxysilane molecules in wood modified with silanol groups. Holzforschung 60:271–277.10.1515/HF.2006.044Search in Google Scholar
Tjeerdsma, B.F., Boonstra, M., Pizzi, A., Tekely, P., Militz, H. (1998) Characterisation of thermally modified wood: molecular reasons for wood performance improvement. Holz als Roh- und Werkstoff 56:149–153.10.1007/s001070050287Search in Google Scholar
Unger, B., Bücker, M., Reinsch, S., Hübert, T. (2012) Chemical aspects of wood modification by sol-gel-derived silica. Wood Sci. Technol. 47:1–22.Search in Google Scholar
Van Opdenbosch, D., Fritz-Popovski, G., Paris, O., Zollfrank, C. (2011) Silica replication of the hierarchical structure of wood with nanometer precision. J. Mater. Res. 26:1193–1202.Search in Google Scholar
Wagner, K.K.W. (1913) Zur Theorie der unvollkommenen Dielektrika. Ann. Phys. 345:817–855.Search in Google Scholar
Wu, Z., Xiang, H., Kim, T., Chun, M.-S., Lee, K. (2006) Surface properties of submicrometer silica spheres modified with aminopropyltriethoxysilane and phenyltriethoxysilane. J. Coll. Interf. Sci. 304:119–124.Search in Google Scholar
Xie, Y., Hill, C.A.S., Xiao, Z., Militz, H., Mai, C. (2010) Silane coupling agents used for natural fiber/polymer composites: a review. Compos. A 41:806–819.10.1016/j.compositesa.2010.03.005Search in Google Scholar
Zhao, G.J., Norimoto, M., Yamada, T., Morooka, T. (1990) Dielectric relaxation of water adsorbed on wood. Mokuzai Gakkaishi 36:257–263.Search in Google Scholar
©2013 by Walter de Gruyter Berlin Boston
Articles in the same Issue
- Masthead
- Masthead
- Original Articles
- Multi-step degradation method for β-O-4 linkages in lignins: γ-TTSA method. Part 3. Degradation of milled wood lignin (MWL) from Eucalyptus globulus
- Evaluation of selective extraction methods for recovery of polyphenols from pine
- Isocyanate-treated cellulose pulp and its effect on the alkali resistance and performance of fiber cement composites
- Hemicelluloses extraction from giant bamboo (Bambusa balcooa Roxburgh) prior to kraft or soda-AQ pulping and its effect on pulp physical properties
- Effect of hydrothermal treatment intensity on the formation of degradation products from birchwood
- Short-time ultrasonication treatment in enzymatic hydrolysis of biomass
- Esterified lignin coating as water vapor and oxygen barrier for fiber-based packaging
- Storage-induced emissions from different wood species
- Determination of cohesive laws in wood bonded joints under mode I loading using the DCB test
- Production of furans from hemicellulosic saccharides in biphasic reaction systems
- Chemistry and water-repelling properties of phenyl-incorporating wood composites
- Comparison of results obtained by static 3- and 4-point bending and flexural vibration tests on solid wood, MDF, and 5-plywood
- Delamination detection in a 90-year-old glulam block with scanning dry point-contact ultrasound
- Short Notes
- Microbial xylitol production from culm of Sasa kurilensis using the yeast Candida magnoliae
- Determination of lignin content in kraft black liquors by capillary zone electrophoresis (CZE)
- Meetings
- Meetings
Articles in the same Issue
- Masthead
- Masthead
- Original Articles
- Multi-step degradation method for β-O-4 linkages in lignins: γ-TTSA method. Part 3. Degradation of milled wood lignin (MWL) from Eucalyptus globulus
- Evaluation of selective extraction methods for recovery of polyphenols from pine
- Isocyanate-treated cellulose pulp and its effect on the alkali resistance and performance of fiber cement composites
- Hemicelluloses extraction from giant bamboo (Bambusa balcooa Roxburgh) prior to kraft or soda-AQ pulping and its effect on pulp physical properties
- Effect of hydrothermal treatment intensity on the formation of degradation products from birchwood
- Short-time ultrasonication treatment in enzymatic hydrolysis of biomass
- Esterified lignin coating as water vapor and oxygen barrier for fiber-based packaging
- Storage-induced emissions from different wood species
- Determination of cohesive laws in wood bonded joints under mode I loading using the DCB test
- Production of furans from hemicellulosic saccharides in biphasic reaction systems
- Chemistry and water-repelling properties of phenyl-incorporating wood composites
- Comparison of results obtained by static 3- and 4-point bending and flexural vibration tests on solid wood, MDF, and 5-plywood
- Delamination detection in a 90-year-old glulam block with scanning dry point-contact ultrasound
- Short Notes
- Microbial xylitol production from culm of Sasa kurilensis using the yeast Candida magnoliae
- Determination of lignin content in kraft black liquors by capillary zone electrophoresis (CZE)
- Meetings
- Meetings