Zhang Xiaoping, Wang Fang, Keer Leon M
Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
Materials (Basel). 2015 Sep 24;8(10):6597-6608. doi: 10.3390/ma8105327.
The objective of this study is to investigate the effect of surface treatment on the morphology and thermo-mechanical properties of bamboo fibers. The fibers are subjected to an alkali treatment using 4 wt % sodium hydroxide (NaOH) for 1 h. Mechanical measurements show that the present concentration has an insignificant effect on the fiber tensile strength. In addition, systematic experimental results characterizing the morphological aspects and thermal properties of the bamboo fibers are analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. It is found that an alkali treatment may increase the effective surface area, which is in turn available for superior bonding with the matrix. Fourier transform infrared spectroscopy analysis reveals that the alkali treatment leads to a gradual removal of binding materials, such as hemicellulose and lignin from the bamboo fiber. A comparison of the curve of thermogravimetric analysis and differential scanning calorimetry for the treated and untreated samples is presented to demonstrate that the presence of treatment contributes to a better thermal stability for bamboo fibers.
本研究的目的是研究表面处理对竹纤维形态和热机械性能的影响。纤维用4 wt%的氢氧化钠（NaOH）进行碱处理1小时。力学测量表明，当前浓度对纤维拉伸强度的影响不显著。此外，通过扫描电子显微镜、傅里叶变换红外光谱、热重分析和差示扫描量热法对表征竹纤维形态和热性能的系统实验结果进行了分析。发现碱处理可能会增加有效表面积，进而有利于与基体的优异结合。傅里叶变换红外光谱分析表明，碱处理导致竹纤维中的半纤维素和木质素等结合材料逐渐去除。给出了处理和未处理样品的热重分析曲线和差示扫描量热法曲线的比较，以证明处理的存在有助于提高竹纤维的热稳定性。
