Buhar kullanılarak yapılan termal modifikasyonun Gigantochloa levis ve Bambusa vulgaris'in fiziko-mekanik özelliklerine etkisi

Öz

Bambu, sürdürülebilir bir yapı malzemesidir ancak higroskopikliği ve biyolojik bozunmaya yatkınlığı nedeniyle sınırlamalara sahiptir. Bu çalışma, Gigantochloa levis ve Bambusa vulgaris'in fiziko-mekanik özelliklerine 175 °C ve 200 °C'de 30 dakika süreyle buharla termal modifikasyonun (TM) etkilerini değerlendirmiştir. Düğüm ve düğüm arası bölümler, tamamen rastgele faktöriyel tasarım kullanılarak fiziksel (nem içeriği, kalınlığına şişmesi, su emme, bağıl yoğunluk) ve mekanik (eğilme, basınç, çekme) özellikler açısından test edilmiştir. TM, nem içeriğini, su emmeyi ve radyal şişmeyi azaltarak boyutsal kararlılığı önemli ölçüde iyileştirmiştir. Bağıl yoğunluk esas olarak türden etkilendi. Eğilmede elastikiyet modülü etkilenmeden kalırken, eğilme direnci 200 °C'de azaldı. Düğüm bölümleri, düğüm arası bölümlere göre sürekli olarak daha düşük çekme dayanımı göstermiş ve en düşük değerler 200 °C'de görülmüştür. Buna karşılık, basınç direnci TM'den sonra önemli ölçüde artmıştır. Genel olarak, orta düzeyde termal modifikasyon (30 dakika 175 °C), her iki tür için de gelişmiş boyutsal kararlılık ve mekanik performans arasında en uygun dengeyi sağlamıştır.

Anahtar Kelimeler

• bamboo modification
• dimensional stability
• flexural
• tensile
• compression

Effect of thermal modification using steam on the physico-mechanical properties of Gigantochloa levis and Bambusa vulgaris

Öz

Bamboo is a sustainable construction material, but is limited by its hygroscopicity and susceptibility to biodegradation. This study evaluated the effects of steam thermal modification (TM) at 175 °C and 200 °C for 30 min on the physico-mechanical properties of Gigantochloa levis and Bambusa vulgaris. Node and internode sections were tested for physical (moisture content, thickness swelling, water absorption, relative density) and mechanical (flexural, compression, tensile) properties using a completely randomized factorial design. TM significantly improved dimensional stability by reducing moisture content, water absorption, and radial swelling. Relative density was mainly influenced by species. While flexural modulus of elasticity remained unaffected, the modulus of rupture decreased at 200 °C. Nodal sections consistently exhibited lower tensile strength than internodes, with the lowest values occurring at 200 °C. Conversely, compression strength significantly increased after TM. Overall, moderate thermal modification (175 °C for 30 min) provided the optimal balance between enhanced dimensional stability and mechanical performance for both species.

Anahtar Kelimeler

• : bamboo modification
• dimensional stability
• flexural
• tensile
• compression

Destekleyen Kurum

Philippine Council for Agriculture, Aquatic and Natural Resources Research and Development (PCAARRD) of the Department of Science and Technology (DOST).

Etik Beyan

The authors declare no conflict of interest.

Teşekkür

The authors would like to express their sincere gratitude to the management and staff of DOST-FPRDI for their support. Special thanks are extended to Engr. Gilberto N. Sapin and the Plywood Unit staff of EPDS for their assistance during laboratory experiments and testing, and to Mr. John Marc Abogador for preparing the methodology illustrations

Kaynakça

1. Alipon, M. A., Bauza, E. B., and Sapin, G. N., (2011), Development of floor tiles from Philippine bamboos, Philippine Journal of Science, 140 (1), 33-39.
2. ASTM D143-2014. Standard methods of testing small clear specimens of timber. Annual Book of ASTM Standards, Section 4, Vol. 04.10, West Conshohocken, PA, USA.
3. Awalluddin, D., Mohd Ariffin, M. A., Osman, M. H., Hussin, M. W., Ismail, M. A., Lee, H. S., and Abdul Shukor Lim, N. H., (2017), Mechanical properties of different bamboo species, MATEC Web of Conferences, 138, 1-10, https://doi.org/10.1051/matecconf/20171 3801024
4. Ba, Z., Luo, H., Guan, J., Luo, J., Gao, J., Wu, S., and Ritchie, R. O., (2023). Robust flexural performance and fracture behavior of TiO₂ decorated densified bamboo as sustainable structural materials, Nature Communications, 14 (1), 1234, https://doi.org/10.1038/s41467-023-36939-6
5. Bui, Q., Grillet, A., and Tran, H., (2017), A bamboo treatment procedure: Effects on the durability and mechanical performance, Sustainability, 9 (9), 1444, https://doi.org/10.3390/su9091444
6. Cermak, P., Rautkari, L., Horacek, P., Saake, B., Rademacher, P., and Sablik, P., (2015). Analysis of dimensional stability of thermally modified wood affected by re-wetting cycles, BioResources, 10 (2), 3242-3253, https://doi.org/10.15376/biores.10.2.3242-3253
7. Finnish Thermowood Association, (2003), ThermoWood handbook, Helsinki, Finland. http://www.thermowood.fi Halip, J. A., Roslan, M. N., Rashid, A, H. A., Seman, N. A. A., Ahmad, N., and Nagasamy, A., (2025), Brief review of bamboo particle-based composites: parameter and performances, Furniture and Wooden Material Research Journal, 8(2), 487-499, https://doi.org/10.33725/mamad.1789197 Hill, C., (2006), Wood modification: Chemical, thermal, and other processes, John Wiley and Sons, Hoboken, NJ, USA, https://doi.org/10.1002/0470021748
8. Huang, P., Latif, E., Chang, W. S., Ansell, M., and Lawrence, M., (2017), Water vapour diffusion resistance factor of Phyllostachys edulis (Moso bamboo), Construction and Building Materials, 141, 216-221, https://doi.org/10.1016/j.conbuildmat.2017.02.156

9. Iswanto, A. H., Madyaratri, E. W., Hutabarat, N. S., Zunaedi, E. R., Darwis, A., Hidayat, W., Susilowati, A., Adi, D. S., Lubis, M. A. R., Sucipto, T., Fatriasari, W., Antov, P., Savov, V., and Hua, L.S., (2022), Chemical, physical, and mechanical properties of Belangke bamboo (Gigantochloa pruriens) and its application as a reinforcing material in particleboard manufacturing, Polymers, 14,3111, https://doi.org/10.3390/polym14153111
10. Jais, F. N. M., Mokeramin, M., Roslan, M. N., Halip, J. A., and Jusoh, W. A. W., (2023), Bamboo fiber for textile applications. In Md Tahir, P., Lee, S. H., Osman Al-Edrus, S. S., and Uyup, M. K. A. (Eds.), Multifaceted Bamboo: Engineered Products and Other Applications, 275-290. Springer Nature, Singapore.
11. Jimenez J. J. P., Macalinao, M. G. M., and Sapin, G. N., (2021), Physico-mechanical properties of two Philippine bamboos thermally modified in a steam environment, Philippine Journal of Science, 150 (1).
12. Jimenez, J. J. P., and Ramos, J. E. C., (2024), Dimensional stability and mechanical strength of thermally modified giant bamboo [Dendrocalamus asper (Schult.) Backer] using steam and oil, Advances in Bamboo Science, 7, 100081, https://doi.org/10.1016/j.bamboo.2024. 100081
13. Jimenez, J. J. P., and Razal, R. A., (2004), Physical and chemical properties of thermally modified Yemane (Gmelina arborea R. Br.) wood, FPRDI Journal, 30 (1), 89-102.
14. Jimenez, J. J. P., and Rizare, M. D., (2024), Physico-mechanical properties and decay fungi resistance of Dendrocalamus asper and Bambusa spinosa thermally modified in spent engine oil medium. Advances in Bamboo Science, 9, 100117, https://doi.org/10.1016/j.bamboo.2024.100117
15. Li, W., Chen, L., Li, Y., and Li, X., (2020), Bamboo modification with 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) catalyzed by maleic anhydride, Journal of Wood Chemistry and Tech., 40 (2), 126-135,https://doi.org/10.1080/02773813.2019. 1697293
16. Liang, Z., Jiang, H., and Tan, Y., (2024), A review of thermal treatment for bamboo and its composites, Green Processing and Synthesis, 13 (1), https://doi.org/10.1515/gps-2023-0263
17. Liese, W., and Tang, T. K. H., (2015), Preservation and drying of bamboo, In Liese, W., and Köhl, M. (Eds.), Bamboo, Vol. 10, Springer, Cham, https://doi.org/10.1007/978-3-319-14133-6_9
18. Lou, Z., Zheng, Z., Yan, N., Jiang, X., Zhang, X., Chen, S., Xu, R., Liu, C., and Xu, L., (2023), Modification and application of bamboo-based materials: A review—Part II: Application of bamboo-based materials, Forests, 14 (11), 2266, https://doi.org/10.3390/f14112266
19. Mangurai, S. U. N. M., Maulana, S., Murda, R. A., Muhamad, S., Hidayat, W., and Bindar, Y., (2022), Physical and mechanical properties of bamboo oriented strand board under various post-thermal treatment duration, Jurnal Sylva Lestari, 10 (3), 310-320, https://doi.org/10.23960/jsl.v10i3.594
20. Ogunbiyi, M. A., Olawale, S. O., Tudjegbe, O. E., and Akinola, S. R., (2015), Comparative analysis of the tensile strength of bamboo and reinforcement steel bars as structural member in building construction, International Journal of Scientific and Technology Research, 4 (11), 47-52.
21. Pangestu, L. C., Priadi, T., and Prayogo, Y. H., (2026), Resistance to termites and colour change in Gombong bamboo (Gigantochloa pseudoarundinacea) modified with boron compounds, vegetable oil, and heating, Jurnal Sylva Lestari, 14 (1), 126-144, https://doi.org/10.23960/jsl.v14i1.1270
22. Ramful, R., and Sakuma, A., (2021), Effect of smoke treatment on flexural strength of bamboo hierarchical structure, BioResources, 16 (1), 387-402, https://doi.org/10.15376/ biores.16.1.387-402
23. Ramos, J. E. C., Jimenez J. J. P., and Acda, M. N., (2022). Physico-mechanical properties of arc-laminated giant bamboo using thermally modified segments. European Journal of Wood and Wood Products, 80(6), 1367-1375, https://doi.org/10.1007/s00107-022-01848-w
24. Ramos, J. E. C., and Jimenez, J. J. P., (2025), Enhancıng the physıco-mechanıcal propertıes of Phılıppıne bamboos through spent cookıng oıl heat treatment, Journal of Tropical Forest Science, 37(3), 342-355, https://doi.org/10.26525/jtfs2025.37.3.342
25. Rao, J., Bao, L., Wang, B., Fan, M., and Feo, L., (2018), Plasma surface modification and bonding enhancement for bamboo composites, Composites Part B: Engineering, 138, 157-167, https://doi.org/10.1016/j.compositesb.2017.11.025
26. Razal, R. A., Dolom, P. C., Palacpac, A. B., Villanueva, M. M. B., Alipon, M. A., Bantayan, R. B., and Malab, S. C., (2012), Mainstreaming engineered-bamboo products for construction and furniture, Philippine Council for Agriculture, Aquatic and Natural Resources Research and Development and Forestry Development Center, Philippines.
27. Sandberg, D., Kutnar, A., and Mantanis, G., (2017), Wood modification technologies – A review, iForest, 10, 895-908, https://doi.org/10.3832/ifor2380-010
28. Tang, T., Chen, X., Zhang, B., Liu, X., and Fei, B., (2019), Research on the physico-mechanical properties of Moso bamboo with thermal treatment in tung oil and its influencing factors, Materials, 12 (4), 599, https://doi.org/10.3390/ma12040599
29. Wu, J., Zhong, T., Zhang, W., Shi, J., Fei, B., and Chen, H., (2021), Comparison of colors, microstructure, chemical composition and thermal properties of bamboo fibers and parenchyma cells with heat treatment, Journal of Wood Science, 67(1), 56. https://doi.org/10.1186/s10086-021-01988-2
30. Xiao, X., Liang, X., Peng, H., Wang, K., Liu, X., and Li, Y., (2022), Multi-scale evaluation of the effect of thermal modification on chemical components, dimensional stability, and anti-mildew properties of Moso bamboo, Polymers, 14 (21), 4677, https://doi.org/10.3390/polym14214677
31. Yang, X., Huang, Y., Ye, C., Lin, X., Su, N., and Fei, B., (2022), Improving the dimensional stability of round bamboo by environment-friendly modified rosin, Construction and Building Materials, 365, 130078, https://doi.org/10.1016/j.conbuildmat.2022.130078
32. Yu, W., and Wang, Y., (2023), Research on the change in chemical composition and fungal resistance of moso bamboo with heat treatment, Polymers, 15(2), 453. https://doi.org/10.3390/polym15020453
33. Zhang, Y. M., Yu, Y. L., and Yu, W. J., (2012), Effect of thermal treatment on the physical and mechanical properties of Phyllostachys pubescens bamboo, European Journal of Wood and Wood Products, 71 (1), 61-67, https://doi.org/10.1007/s00107-012-0643-6
34. Zhang, Y., and Yu, W., (2013), Effect of thermal treatment on the properties of bamboo-based fiber composites, Scientia Silvae Sinicae, 49 (5), 160-168, https://doi.org/10.11707/j.1001-7488.20130521
35. Zheng, Y., Liu, L., Bao, M., Lin, F., Wu, X., Li, Y., Gong, Y., Gu, W., and Zhang, W., (2025), Physical and mechanical properties and microstructure characterization of thermally modified flattened bamboo (Phyllostachys edulis) material, Forests, 16 (4), 694, https://doi.org/10.3390/f16040694
36. Zheng, Z., Yan, N., Lou, Z., Jiang, X., Zhang, X., Chen, S., Xu, R., Liu, C., and Xu, L., (2023), Modification and application of bamboo-based materials: A review—Part I: modification methods and mechanisms, Forests, 14 (11), 2219, https://doi.org/10.3390/f14112219