Electrospun cellulose nanocrystals/poly(methyl methacrylate) composite nanofibers: Morphology, thermal and mechanical properties
Electrospun cellulose nanocrystals/poly(methyl methacrylate) composite nanofibers: Morphology, thermal and mechanical properties
复制标题
电纺纤维素纳米晶/聚甲基丙烯酸甲酯复合纳米纤维：形态、热性能和机械性能
DOI：
10.1016/j.carbpol.2018.10.103
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发表时间：
2019-02-15
影响因子：
11.2
通讯作者：
Han, Guangping
中科院分区：
文献类型：
--
作者：
Ni, Xiaohui;Cheng, Wanli;Han, Guangping
采用静电纺丝工艺制备了纤维素纳米晶增强聚甲基丙烯酸甲酯（PMMA）复合纳米纤维。研究了环境相对湿度对CNC/PMMA纳米纤维微观结构的影响。结果表明，CNC/PMMA纤维表面光滑。随着CNC加载量的增加，纤维直径逐渐减小，直径变化幅度减小。由于PMMA分子链与CNC纳米颗粒之间的氢键作用，CNC/PMMA纳米纤维的热性能也得到了提高。与纯PMMA纤维相比，复合纳米纤维的存储模量和拉伸强度有明显提高。通过增加静电纺丝环境的相对湿度，CNC/PMMA纳米纤维的表面呈现出明显的纳米多孔性，同时表面粗糙度和孔隙率增加。此外，cnc对加速孔隙的演化和增加表面粗糙度至关重要。我们的研究结果为静电纺丝制备具有理想性能和孔结构的纳米纤维提供了有用的指导。
An electrospinning process was utilized to fabricate composite nanofibers of poly(methyl methacrylate) (PMMA) reinforced with cellulose nanocrystals (CNCs). The effect of environmental relative humidity on the micro-structure of CNC/PMMA nanofibers was investigated. Results showed that fiber surfaces of CNC/PMMA appeared smooth. Fibers had gradually decreasing diameters and lower diameter variations as CNC loading increased. The thermal property of CNC/PMMA nanofibers was also enhanced due to hydrogen bonding between PMMA molecular chains and CNC nanoparticles. Compared to pure PMMA fibers, the storage modulus and tensile strength of composite nanofibers were pronouncedly improved. By increasing relative humidity of the electrospinning environment, these nanofibers showed prominent nanoporous surfaces while the surface roughness and porosity of CNC/PMMA nanofibers increased. Furthermore, CNCs were critical to accelerating the evolution of pores and increasing surface roughness. Our findings can provide useful guidelines for the fabrication of nanofibers with desired properties and pore structure by electrospinning.