Mohd Pisal Mohd Hanif, Osman Azlin Fazlina, Jin Tan Soo, Rahman Rozyanty A, Alrashdi Awad A, Masa Abdulhakim
Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia.
Centre of Excellence for Biomass Utilization (CoEBU), Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia.
Polymers (Basel). 2021 Feb 17;13(4):600. doi: 10.3390/polym13040600.
Carbonized natural filler can offer the production of low cost composites with an eco-friendliness value. The evolving field of electronics encourages the exploration of more functions and potential for carbonized natural filler, such as by modifying its surface chemistry. In this work, we have performed surface modification on carbonized wood fiber (CWF) prior to it being used as filler in the ethylene vinyl acetate (EVA) composite system. Zinc chloride (ZnCl) with various contents (2 to 8 wt%) was used to surface modify the CWF and the effects of ZnCl composition on the surface morphology and chemistry of the CWF filler were investigated. Furthermore, the absorptive, mechanical, thermal, and electrical properties of the EVA composites containing CWF-ZnCl were also analyzed. SEM images indicated changes in the morphology of the CWF while FTIR analysis proved the presence of ZnCl functional groups in the CWF. EVA composites incorporating the CWF-ZnCl showed superior mechanical, thermal and electrical properties compared to the ones containing the CWF. The optimum content of ZnCl was found to be 6 wt%. Surface modification raised the electrical conductivity of the EVA/CWF composite through the development of conductive deposits in the porous structure of the CWF as a channel for ionic and electronic transfer between the CWF and EVA matrix.
碳化天然填料可为低成本复合材料的生产提供环保价值。不断发展的电子领域促使人们探索碳化天然填料的更多功能和潜力，例如通过改变其表面化学性质。在这项工作中，我们在将碳化木纤维（CWF）用作乙烯-醋酸乙烯酯（EVA）复合体系的填料之前，对其进行了表面改性。使用不同含量（2至8 wt%）的氯化锌（ZnCl）对CWF进行表面改性，并研究了ZnCl组成对CWF填料表面形态和化学性质的影响。此外，还分析了含有CWF-ZnCl的EVA复合材料的吸收、机械、热和电性能。扫描电子显微镜（SEM）图像显示了CWF形态的变化，而傅里叶变换红外光谱（FTIR）分析证明了CWF中存在ZnCl官能团。与含有CWF的EVA复合材料相比，掺入CWF-ZnCl的EVA复合材料表现出优异的机械、热和电性能。发现ZnCl的最佳含量为6 wt%。表面改性通过在CWF的多孔结构中形成导电沉积物作为CWF与EVA基体之间离子和电子转移的通道，提高了EVA/CWF复合材料的电导率。
