Singh Balkeshwar, Dessalegn Yalew, Wakjira Melesse Workneh, Girma Cherinet, Rajhi Ali A, Duhduh Alaauldeen A
Department of Mechanical Engineering, Program of Manufacturing Engineering, Adama Science & Technology University, Adama P.O. Box 1888, Ethiopia.
Department of Mechanical Engineering, Kombolcha Institute of Technology, Wollo University, Kombolcha P.O. Box 208, Ethiopia.
Materials (Basel). 2023 Jul 24;16(14):5196. doi: 10.3390/ma16145196.
This study aims to evaluate how age, harvesting seasons, and culm height affect the properties of various bamboo species. The properties of bamboo fibres for composite development in Ethiopia have not been investigated so far. In this study, the properties of and were scientifically investigated for bamboo culm structural applications and bamboo fibre composite development based on age and the harvesting season. was collected at Injibara and Mekaneselam which are located in east Gojjam and south wollo, whereas was collected at Kombolcha which is located in south Wollo, Ethiopia. Three representatives of bamboo plants were collected in the three regions, namely from three age groups, across two harvesting months. The highest and lowest moisture content and shrinkage were measured at the ages of one year and three years, respectively, whereas basic densities were measured at the ages of three years and one year. The harvest month of November yields higher moisture content and shrinkage but lower basic densities compared to February. has a higher moisture content and shrinkage but lower basic densities compared to . The current research demonstrates that the three-year-old groups and the harvesting month of February produce yields more suited for construction and structural purposes due to the ensuing good dimensional stability after drying. From the highest to the lowest percentage of the degree of crystallinity of the yield, it is that derived from Inj., followed by Meka., and then Kombolcha, respectively. Bamboo fibres have high powder crystals and degradation temperatures which make them suitable for composite development at two year old. has a higher degree of crystallinity and degradation temperature of cellulose compared to .
本研究旨在评估年龄、收获季节和竹杆高度如何影响各种竹种的特性。迄今为止，尚未对埃塞俄比亚用于复合材料开发的竹纤维特性进行研究。在本研究中，基于年龄和收获季节，对[具体竹种1]和[具体竹种2]的特性进行了科学研究，以用于竹杆结构应用和竹纤维复合材料开发。[具体竹种1]采自位于东戈贾姆和南沃洛的因吉巴拉和梅卡内塞拉姆，而[具体竹种2]采自埃塞俄比亚南沃洛的孔博尔查。在这三个地区收集了三个年龄段的三种代表性竹株，跨越两个收获月份。含水量和收缩率最高和最低值分别出现在一年和三年的竹龄，而基本密度则在三年和一年的竹龄时测量。与2月相比，11月收获的竹子含水量和收缩率更高，但基本密度更低。[具体竹种1]比[具体竹种2]具有更高的含水量和收缩率，但基本密度更低。当前研究表明，三岁组和2月收获的竹子由于干燥后具有良好的尺寸稳定性，因此产量更适合用于建筑和结构用途。从结晶度百分比最高到最低依次为来自因吉巴拉的竹子、其次是梅卡内塞拉姆的竹子，然后是孔博尔查的竹子。竹纤维具有较高的粉末晶体和降解温度，这使其适合在两岁时用于复合材料开发。[具体竹种1]比[具体竹种2]具有更高的结晶度和纤维素降解温度。
