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Tensile Properties and Structure Characterization of Palm Fibers by Alkali Treatment
Ying Jiang,Penghu Deng,Lingxiao Jing,Tonghua Zhang 한국섬유공학회 2019 Fibers and polymers Vol.20 No.5
This work aims to reveal how the alkali influences the mechanical behavior and structural stability of palm fiber. First, palm fiber samples were treated with 20 % and 40 % NaOH solutions separately for approximately 1, 2, 3, and 4 h atroom temperature. Then the samples were characterized using tensile testing, Fourier transform infrared spectroscopy, X-raydiffraction, and thermogravimetric analysis. Results showed the tensile properties of alkali-treated fibers exceeded those ofuntreated fibers. Notably, the fibers treated with 40 % NaOH for 1 h yielded the most significant improvements. The tensilestrength, elongation at break, Young’s modulus, and yield point increased by 28.8 %, 38 %, 52.1 %, and 64.7 %, respectively,compared with the untreated fibers. The increase appeared to be due to the removal of non-cellulosic materials andrearrangement of the cellulose chains.