Fracture behavior of wood bonding interface based on fiber pull-out test

Li Zhenrui; Li Yunqi; Lin Lanying; Liu Xing’e

doi:10.12171/j.1000-1522.20230054

Journal of Beijing Forestry University > 2023 > 45(6): 117-126. > DOI: 10.12171/j.1000-1522.20230054

Li Zhenrui, Li Yunqi, Lin Lanying, Liu Xing’e. Fracture behavior of wood bonding interface based on fiber pull-out test[J]. Journal of Beijing Forestry University, 2023, 45(6): 117-126. DOI: 10.12171/j.1000-1522.20230054

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Fracture behavior of wood bonding interface based on fiber pull-out test

1.
Research Institute of Wood Industry, Key Laboratory of Wood Science and Technology,National Forestry and Grassland Administration, Beijing 100091, China
2.
International Centre for Bamboo and Rattan, Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing 100102, China

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Received Date: March 09, 2023
Revised Date: April 02, 2023
Accepted Date: April 03, 2023
Available Online: April 05, 2023
Published Date: June 24, 2023

Graphical Abstract

Abstract

Abstract

Objective The true interfacial shear strength of the wood/phenolic resin (PF) bonding interface was investigated via the fiber pull-out method in composite materials, and the fracture morphology of wood strips and the failure mode of cell wall layers after pulling out were analyzed to provide theoretical support for revealing the fracture mechanism of wood bonding interface.
Method Two types of earlywood and latewood strips/PF resin bonding specimens were prepared, respectively, according to the preliminary exploration of test conditions. The average interfacial shear strength was calculated by the data collected from a universal mechanical testing machine and measured by the three-dimensional ultra-depth of field microscope. Fourier transform infrared spectroscopy (FTIR) was used to analyze the intermolecular interaction of polymer in the bonding interface. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were applied to acquire the macroscopic differences in fracture morphology of two types of wood strips after pulling out, the microscopic failure mode of cell wall layers, as well as the initiation and diffusion of cracks.
Result The load-displacement curves of the pull-out test showed that brittle fracture occurred within the wood/PF bonding interface. The interfacial shear strength of earlywood/PF resin was (1.23 ± 0.12) MPa, and that of early-latewood/PF resin was (3.66 ± 0.11) MPa, about three times of earlywood/PF resin. FTIR analysis showed that the chemical cross-linking reaction between wood and PF resin polymer molecules was confirmed to enhance the bonding interface property. SEM results showed that the fracture type of the earlywood sample on the top of the embedment was shear failure, while that was combined tension and shear on the bottom of the embedment. The fracture type of the early-latewood sample was mainly splintering tension failure. AFM images showed that the failure of the earlywood strip was the intrawall failure. The initial crack occurred in the S₂ layer of the adjacent tracheid wall with a significant thickness variation and then propagated along the S₁/S₂ interface. The initial crack in the S₂ layer of latewood cells of the early-latewood sample simultaneously expanded along the CML/S₁ and S₁/S₂ interfaces. In addition, stress concentration was prone to be in the cross-field region, and the external tension load made the ray cells peel off or fall off as a whole.
Conclusion The difference of PF resin penetration in earlywood and latewood leads to the shear strength difference between the two types of bonding interface. The difference in structure and performance between earlywood and early-late wood is the main reason for the difference in fracture morphology at the interface after pulling out.

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[1]	雷德定, 刘正添, 周雄志. 木材界面学与界面技术[M]. 北京: 中国林业出版社, 2012. Lei D D, Liu Z T, Zhou X Z. Wood interface and technology[M]. Beijing: China Forestry Publishing House, 2012.
[2]	王新洲, 谢序勤, 王思群, 等. 基于纳米压痕技术的木材胶合界面力学行为[J]. 林业科学, 2019, 55(7): 128−136. Wang X Z, Xie X Q, Wang S Q, et al. Investigation of the mechanical behavior of wood-adhesive interphase by using nanoindentation[J]. Scientia Silvae Sinicae, 2019, 55(7): 128−136.
[3]	Jesson D A, Watts J F. The interface and interphase in polymer matrix composites: effect on mechanical properties and methods for identification[J]. Polymer Reviews, 2012, 52(3−4): 321−354.
[4]	Wang J F, Yao Y, Huang Y Q, et al. Effects of the combination of compression and impregnation with phenolic resin on the dimensional stability in the multiscale wood structure of Chinese fir[J]. Construction and Building Materials, 2022, 327: 126960. doi: 10.1016/j.conbuildmat.2022.126960
[5]	Tran A, Mayr M, Konnerth J, et al. Adhesive strength and micromechanics of wood bonded at low temperature[J]. International Journal of Adhesion and Adhesives, 2020, 103: 102697. doi: 10.1016/j.ijadhadh.2020.102697
[6]	Zhang Z W, Dasari A. Effect of temperature on the fracture energy of adhesive layers of engineered wood[J]. International Journal of Adhesion and Adhesives, 2022, 117: 103185. doi: 10.1016/j.ijadhadh.2022.103185
[7]	周斌, 王昕萌, 张柳柳, 等. 自攻螺钉钉入角度对钢板–正交胶合木节点剪切性能的影响[J]. 林业科学, 2022, 58(6): 122−127. Zhou B, Wang X M, Zhang L L, et al. Effects of the penetration angle of self-tapping screw on shear performance of steel plate cross-laminated timber joints[J]. Scientia Silvae Sinicae, 2022, 58(6): 122−127.
[8]	Marra A A. Technology of wood bonding: principles in practice[M]. New York: Springer, 1992.
[9]	江泽慧, 余雁, 费本华, 等. 纳米压痕技术测量管胞次生壁S₂层的纵向弹性模量和硬度[J]. 林业科学, 2004, 40(2): 113−118. doi: 10.3321/j.issn:1001-7488.2004.02.020 Jiang Z H, Yu Y, Fei B H, et al. Using nanoindentation technique to determine the longitudinal elastic modulus and hardness of tracheids secondary wall[J]. Scientia Silvae Sinicae, 2004, 40(2): 113−118. doi: 10.3321/j.issn:1001-7488.2004.02.020
[10]	Herzele S, van Herwijnen H W G, Griesser T, et al. Differences in adhesion between 1C-PUR and MUF wood adhesives to (ligno) cellulosic surfaces revealed by nanoindentation[J]. International Journal of Adhesion and Adhesives, 2020, 98: 102507. doi: 10.1016/j.ijadhadh.2019.102507
[11]	Obersriebnig M, Veigel S, Gindl-Altmutter W, et al. Determination of adhesive energy at the wood cell-wall/UF interface by nanoindentation (NI)[J]. Holzforschung, 2012, 66(6): 781−787. doi: 10.1515/hf-2011-0205
[12]	Chen X Y, Beyerlein I J, Brinson L C. Curved-fiber pull-out model for nanocomposites (1): bonded stage formulation[J]. Mechanics of Materials, 2009, 41(3): 279−292. doi: 10.1016/j.mechmat.2008.12.004
[13]	朱大胜, 顾伯勤, 陈晔. 纤维增强弹性体基复合材料单纤维拔出试验细观力学分析[J]. 工程力学, 2009, 26(5): 1−7. Zhu D S, Gu B Q, Chen Y. Micromechanical analysis of single-fiber pull-out test of fiber-reinforced elastomer matrix composites[J]. Engineering Mechanics, 2009, 26(5): 1−7.
[14]	Wang H, Tian G L, Wang H K, et al. Pull-out method for direct measuring the interfacial shear strength between short plant fibers and thermoplastic polymer composites (TPC)[J]. Holzforschung, 2014, 68(1): 17−21. doi: 10.1515/hf-2013-0052
[15]	Hsueh C H. Interfacial debonding and fiber pull-out stresses of fiber-reinforced composites[J]. Materials Science and Engineering: A, 1990, 123(1): 1−11. doi: 10.1016/0921-5093(90)90203-F
[16]	Yu Y, Jiang Z H, Fei B H, et al. An improved microtensile technique for mechanical characterization of short plant fibers: a case study on bamboo fibers[J]. Journal of Materials Science, 2010, 46(3): 739−746.
[17]	Yu Y, Tian G L, Wang H K, et al. Mechanical characterization of single bamboo fibers with nanoindentation and microtensile technique[J]. Holzforschung, 2011, 65(1): 113−119. doi: 10.1515/hf.2011.009
[18]	Sanadi A R, Rowell R M, Young R A. Evaluation of wood-thermoplastic-interphase shear strength[J]. Journal of Materials Science, 1993, 28(23): 6347−6352. doi: 10.1007/BF01352195
[19]	Rowell R M. Handbook of wood chemistry and wood composites[M]. Boca Raton: CRC Press, 2012.
[20]	Saiki H. The effect of the penetration of adhesives into cell walls on the failure of wood bonding[J]. Journal of the Japan Wood Research Society, 1984, 30(1): 88−92.
[21]	Wong K J, Yousif B F, Low K O. The effects of alkali treatment on the interfacial adhesion of bamboo fibres[J]. Journal of Materials: Design and Applications, 2010, 224(3): 139−148.
[22]	Wang D, Lin L Y, Fu F. Fracture mechanisms of moso bamboo (Phyllostachys pubescens) under longitudinal tensile loading[J]. Industrial Crops and Products, 2020, 153: 112574. doi: 10.1016/j.indcrop.2020.112574
[23]	Zarges J C, Kaufhold C, Feldmann M, et al. Single fiber pull-out test of regenerated cellulose fibers in polypropylene: an energetic evaluation[J]. Composites Part A: Applied Science and Manufacturing, 2018, 105: 19−27. doi: 10.1016/j.compositesa.2017.10.030
[24]	Manchado M A L, Arroyo M, Biagiotti J, et al. Enhancement of mechanical properties and interfacial adhesion of PP/EPDM/Flax fiber composites using maleic anhydride as a compatibilizer[J]. Journal of Applied Polymer Science, 2003, 90(8): 2170−2178. doi: 10.1002/app.12866
[25]	王东. 顺纹拉伸和弯曲作用下的木材破坏机理研究[D]. 南京: 南京林业大学, 2020. Wang D. Wood fracture mechanisms under longitudinal tensile and bend loading[D]. Nanjing: Nanjing Forestry University, 2020.
[26]	Tjeerdsma B F, Militz H. Chemical changes in hydrothermal treated wood: FTIR analysis of combined hydrothermal and dry heat-treated wood[J]. Holz als Roh-und Werkstoff, 2005, 63(2): 102−111. doi: 10.1007/s00107-004-0532-8
[27]	Meng F D, Liu R, Zhang Y H, et al. Improvement of the water repellency, dimensional stability, and biological resistance of bamboo-based fiber reinforced composites[J]. Polymer Composites, 2017, 40(2): 506−513.
[28]	Wang X Z, Deng Y H, Li Y J, et al. In situ identification of the molecular-scale interactions of phenol-formaldehyde resin and wood cell walls using infrared nanospectroscopy[J]. RSC Advances, 2016, 80(6): 76318−76324.
[29]	Huang Y X, Lin Q Q, Yang C, et al. Multi-scale characterization of bamboo bonding interfaces with phenol-formaldehyde resin of different molecular weight to study the bonding mechanism[J]. Journal of the Royal Society Interface, 2020, 162(17): 20190755.
[30]	Bodig J, Jayne B A. Mechanics of wood and wood composites[M]. New York: Van Nostrand Reinhold Co., 1982.
[31]	Zink A G, Pellicane P J, Shuler C E. Ultrastructural analysis of softwood fracture surfaces[J]. Wood Science and Technology, 1994, 28(5): 329−338.
[32]	Li Z R, Long K Y, Zhang Y, et al. Effect of PF resin penetration on interphase microstructure and quantitative micromechanical properties of different grained-wood laminates[J]. Holzforschung, 2022, 76(6): 556−566. doi: 10.1515/hf-2021-0213
[33]	Jakes J E, Hunt C G, Yelle D J, et al. Synchrotron-based X-ray fluorescence microscopy in conjunction with nanoindentation to study molecular-scale interactions of phenol-formaldehyde in wood cell walls[J]. ACS Applied Materials and Interfaces, 2015, 7(12): 6584−6589. doi: 10.1021/am5087598
[34]	Fahlén J, Salmén L. On the lamellar structure of the tracheid cell wall[J]. Plant Biology, 2002, 4(3): 339−345. doi: 10.1055/s-2002-32341

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