Saba N, Mohammad F, Pervaiz M, Jawaid M, Alothman O Y, Sain M
Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
Int J Biol Macromol. 2017 Apr;97:190-200. doi: 10.1016/j.ijbiomac.2017.01.029. Epub 2017 Jan 9.
Present study, deals about isolation and characterization of cellulose nanofibers (CNFs) from the Northern Bleached Softwood Kraft (NBSK) pulp, fabrication by hand lay-up technique and characterization of fabricated epoxy nanocomposites at different filler loadings (0.5%, 0.75%, 1% by wt.). The effect of CNFs loading on mechanical (tensile, impact and flexural), morphological (scanning electron microscope and transmission electron microscope) and structural (XRD and FTIR) properties of epoxy composites were investigated. FTIR analysis confirms the introduction of CNFs into the epoxy matrix while no considerable change in the crystallinity and diffraction peaks of epoxy composites were observed by the XRD patterns. Additions of CNFs considerably enhance the mechanical properties of epoxy composites but a remarkable improvement is observed for 0.75% CNFs as compared to the rest epoxy nanocomposites. In addition, the electron micrographs revealed the perfect distribution and dispersion of CNFs in the epoxy matrix for the 0.75% CNFs/epoxy nanocomposites, while the existence of voids and agglomerations were observed beyond 0.75% CNFs filler loadings. Overall results analysis clearly revealed that the 0.75% CNFs filler loading is best and effective with respect to rest to enhance the mechanical and structural properties of the epoxy composites.
本研究涉及从北方漂白针叶木硫酸盐浆（NBSK）中分离和表征纤维素纳米纤维（CNF），采用手糊技术制备环氧纳米复合材料，并对不同填料含量（0.5%、0.75%、1%重量比）的环氧纳米复合材料进行表征。研究了CNF含量对环氧复合材料的力学性能（拉伸、冲击和弯曲）、形态学性能（扫描电子显微镜和透射电子显微镜）以及结构性能（XRD和FTIR）的影响。FTIR分析证实了CNF已引入环氧基体中，而XRD图谱显示环氧复合材料的结晶度和衍射峰没有明显变化。添加CNF显著提高了环氧复合材料的力学性能，但与其他环氧纳米复合材料相比，0.75%CNF的环氧纳米复合材料的力学性能有显著改善。此外，电子显微镜照片显示，0.75%CNF/环氧纳米复合材料中CNF在环氧基体中分布均匀，而在填料含量超过0.75%时，观察到有空隙和团聚现象。总体结果分析清楚地表明，就提高环氧复合材料的力学和结构性能而言，0.75%的CNF填料含量是最佳且有效的。
