Bamboo ﬁber extraction methods include mechanical, stem explosion, water retting, enzymatic, and chemical methods. Each extraction method has drawbacks in terms of ﬁber quality, cost, eﬃciency, and environmental impact. The combined technique of ﬁber extraction was developed by combining two or more extraction methods in order to minimize the disadvantages of separate methods. This study developed and tested alternative combined ﬁber extraction procedures for the extraction of ﬁbers from bamboo culms, with the goal of minimizing the drawbacks of separate extraction methods by using an environmentally friendly enzyme solution developed by a research group at Chengdu Textile College. The fundamental physical and mechanical properties of bamboo ﬁbers were also investigated. The bamboo species studied were Dendrocalamus membranaceus (S-1), Neosinocalamus aﬃnis (S-2), Phyllostachys heterocycle (S-3), and Phyllostachys bambusoides (S-4). Bamboo ﬁbers with 6.6-56.37 cm ﬁber length, 5.12-95.02 tex linear density, 100-1446 cN breaking strength, 1.2-146.5 cN/tex breaking tenacity, 0.26-3.43% breaking elongation, and 1.44-173.56 cN/tex breaking modulus values were extracted. The coarsest bamboo ﬁbers were extracted using a combined chemical (boiling alkali)-mechanical (rolling) technique, whereas the bamboo ﬁbers with the lowest average length, ﬁneness, and breaking modulus values were extracted using a combined enzymatic-chemical (alkali)-mechanical (rolling) technique. Bamboo ﬁbers extracted using a combined chemical (alkali at room temperature)-enzymatic (by stacking)-mechanical (rolling) technique had the lowest average breaking strength, tenacity, and elongation values but the highest average length. Bamboo ﬁbers with the highest average breaking strength, tenacity, and modulus values were extracted using a combined chemical (alkali at room temperature)-enzymatic (in solution)-mechanical (rolling) technique. The extracted bamboo ﬁbers exhibited variations in fundamental properties, as is typical of plant ﬁbers. The ﬁbers extracted using a combination of enzymatic-chemical (alkali)-mechanical (rolling) methods showed the least variation.
Fund:Project supported partly by the Ethiopian Higher Education Project (No. 51235) of the German Development Bank
Fisseha Wubneh Asmare,Xiaodong Liu,Guanfang Qiao, et al. Physical and Mechanical Properties of Coarse Bamboo Fibers Extracted by Diﬀerent Techniques[J]. Journal of Fiber Bioengineering and Informatics, 2022, 15(4): 287-302.