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首页> 外文期刊>Journal of Applied Polymer Science >Nylon 66 Nanofibers Prepared by CO_2 Laser Supersonic Drawing
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Nylon 66 Nanofibers Prepared by CO_2 Laser Supersonic Drawing

机译：CO_2激光超声拉伸制备尼龙66纳米纤维

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摘要

Nylon 66 nanofibers were prepared by irradiating as-spun nylon 66 fibers with radiation from a carbon dioxide (CO_2) laser while drawing them at supersonic velocities. A supersonic jet was generated by blowing air into a vacuum chamber through the fiber injection orifice. The fiber diameter depended on the drawing conditions used, such as laser power, chamber pressure, laser irradiation point, and fiber supply speed. A nanofiber obtained at a laser power of 20 W and a chamber pressure of 20 kPa had an average diameter of 0.337 μm and a draw ratio of 291,664, and the drawing speed in the CO_2 laser supersonic drawing was 486 m s~(-1). The nanofibers showed two melting peaks at about 257 and 272℃. The lower melting peak is observed at the same temperature as that of the as-spun fiber, whereas the higher melting peak is about 15℃ higher than the lower one.
机译：尼龙66纳米纤维是通过用二氧化碳（CO_2）激光辐射初纺的尼龙66纤维并以超音速拉伸而制备的。通过将空气通过纤维注入孔吹入真空室，产生超音速射流。纤维直径取决于所使用的拉伸条件，例如激光功率，腔室压力，激光辐照点和纤维供应速度。以20W的激光功率和20kPa的腔室压力获得的纳米纤维的平均直径为0.337μm，拉伸比为291,664，并且在CO_2激光超声拉伸中的拉伸速度为486m s·（-1）。纳米纤维在约257和272℃出现两个熔融峰。在与初纺纤维相同的温度下观察到较低的熔融峰，而较高的熔融峰比较低的熔融峰高约15℃。

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