Electrospinning Preparation of Si@PVDF Nanostructured Energetic Material
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摘要:采用静电纺丝工艺制备了理想化学计量比的Si@PVDF纳米结构含能材料，并与超声物理混合法所制备的Si/PVDF纳米复合含能材料进行了对比分析。形貌表征显示所制备的Si@PVDF纤维表面光滑，纳米硅粉在PVDF中分布均匀；在10 K? min-1升温速率下，Si@PVDF的反应起始温度（482.15℃）与反应峰值温度（495.58℃）均略低于Si/PVDF （484.26 ℃，498.25 ℃），二者反应热相当。在定容燃烧实验中，Si/PVDF不能自持燃烧，而Si@PVDF可以自持燃烧，25 mg装药量下，燃烧最大压力0.379 MPa，平均升压速率15.95 MPa?s-1，燃烧持续时间79 ms。
Abstract:In this paper，Si@PVDF nanostructured energetic materials with ideal stoichiometric ratio was prepared by use of electrospinning process，and compared with the Si/PVDF counterpart prepared by the ultrasonic physical mixing method. The morphology characterization show the prepared Si@PVDF fiber has a smooth surface, and the nano-silicon powder is relatively evenly distributed in PVDF. At the heating rate of 10 K·min-1, the reaction onset temperature and peak temperature of Si@PVDF is 482.15℃ and 495.58℃, respectively, which are slightly lower than those of Si/PVDF (484.26℃, 498.25℃), while the heats of reaction are equivalent. In the constant volume combustion experiment, the Si/PVDF cannot achieve self-sustained combustion, while Si@PVDF can be ignited successfully. With a charge of 25 mg, the maximum combustion pressure of Si@PVDF is 0.379 MPa, the average pressurization rate is 15.95 MPa·s-1, and the burning duration is 79 ms.
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