Novel pressurised gyration device for making core-sheath polymer fibres
Novel pressurised gyration device for making core-sheath polymer fibres
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DOI：
10.1016/j.matdes.2019.107846
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发表时间：
2019-09
影响因子：
8.4
通讯作者：
S. Mahalingam;S. Homer-Vanniasinkam;M. Edirisinghe
中科院分区：
文献类型：
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作者：
S. Mahalingam;S. Homer-Vanniasinkam;M. Edirisinghe
两种聚合物的芯鞘纤维是用一种新颖的装置生成的，在这种装置中，转速和压力可以在环境温度下变化。特殊设计的喷丝孔由内外腔组成，可容纳两种聚合物和其他添加剂。用聚环氧乙烷和聚甲基丙烯酸甲酯（PMMA）证明了这种新方法。染料被用作聚合物的着色剂来验证芯鞘的形成，形成的纤维的光学、扫描和荧光显微镜证实了芯鞘组合的存在。获得的芯径为5 ~ 10 μm，护套纤维直径为20 ~ 30 μm。通过选择成形条件可以预先设定芯套直径。为了显示新方法的灵活性，还使用新装置生产了含有PMMA纤维的纳米颗粒，并通过电子显微镜和能量色散x射线能谱分析验证了纳米颗粒在纤维鞘和芯中的结合。获得了高产量的纤维，并在更严格的成型条件下，生成的芯鞘纤维的尺寸可以减小到纳米级。因此，新工艺具有在单一可扩展设置中制造各种新型功能材料和结构的真正能力。
Core-sheath fibres of two polymers were generated using a novel set-up where rotating speed and pressure can be varied at ambient temperature. The specially designed spinneret consists of inner and outer chambers which can accommodate two polymers and other additives. The new methodology was demonstrated using poly(ethylene oxide) and poly(methylmethacrylate) (PMMA). Dyes were used as colouring agents for the polymers to verify core-sheath formation, and optical, scanning and fluorescent microscopy of the formed fibres confirmed the presence of a core-sheath combination. The core diameter obtained was in the range 5–10 μm and the sheath fibre diameter was 20–30 μm. The core/sheath diameter can be pre-set by selecting the forming conditions. To show the flexibility of the new method, nanoparticle containing PMMA fibres were also produced using the new device and incorporation of the nanoparticles in the sheath and core of the fibres was verified by electron microscopy and energy-dispersive X-ray spectroscopy analysis. A high yield of fibre was obtained and with more severe forming conditions the size of core-sheath fibres generated can be reduced to the nanoscale. Thus, the new process has a real capability of manufacturing a wide variety of novel functional materials and structures in a single scalable set-up.