Zhao Hua, Tang Jie, Li Ziwei, Xiong Tianwang, Zhou Tao
School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China.
School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China.
Int J Biol Macromol. 2024 Dec;283(Pt 2):137590. doi: 10.1016/j.ijbiomac.2024.137590. Epub 2024 Nov 13.
This study aimed to enhance the engineering performance of bamboo fibers for use in composite materials by employing a sustainable plant ash alkali treatment. The primary objective was to improve the tensile strength, crystallinity, and thermal stability of bamboo fibers, which are known for their high specific strength, low density, and biodegradability but suffer from poor compatibility with hydrophobic matrices. The study involved treating bamboo fibers with varying concentrations of plant ash solutions (5 %, 10 %, 20 %, and 30 % by mass fraction) and comparing the results with those from conventional NaOH treatment (5 % and 10 %). The results showed that plant ash treatment at a 20 % concentration significantly improved tensile strength by 14.16 % compared to untreated fibers, increased the crystallinity index to 74.31 %, and enhanced thermal stability, retaining more residual mass at high temperatures than NaOH-treated fibers. These improvements are attributed to the reduction in fiber polarity and better preservation of fiber structure. The findings suggest that plant ash, as a cost-effective and eco-friendly alternative to NaOH, can significantly enhance the mechanical and thermal properties of bamboo fibers, making them suitable for use in environmentally sustainable composite materials in construction, and other industries.
本研究旨在通过采用可持续的植物灰碱处理方法，提高用于复合材料的竹纤维的工程性能。主要目标是提高竹纤维的拉伸强度、结晶度和热稳定性，竹纤维以其高比强度、低密度和生物降解性而闻名，但与疏水性基体的相容性较差。该研究涉及用不同浓度的植物灰溶液（质量分数分别为5%、10%、20%和30%）处理竹纤维，并将结果与传统NaOH处理（5%和10%）的结果进行比较。结果表明，与未处理的纤维相比，20%浓度的植物灰处理显著提高了14.16%的拉伸强度，使结晶度指数提高到74.31%，并增强了热稳定性，在高温下比NaOH处理的纤维保留了更多的残余质量。这些改进归因于纤维极性的降低和纤维结构的更好保存。研究结果表明，植物灰作为一种经济高效且环保的NaOH替代品，可显著提高竹纤维的机械性能和热性能，使其适用于建筑及其他行业的环境可持续复合材料。
