溶剂-非溶剂法制备抗静电硝化棉复合材料及其性能表征

以硝化棉和导电填料为原料,采用溶剂-非溶剂法制备了抗静电硝化棉复合材料。通过扫描电子显微镜、体积表面电阻测定仪、非接触式静电压测试仪、热分析仪表征了抗静电硝化棉复合材料的微观形貌、抗静电性能及热分解性能。结果表明,导电填料质量分数为0.6%的抗静电硝化棉复合材料内部导电网络分布均匀、完整,体积电阻率和表面电阻率分别为1.02×109Ω·m和4.66×1010Ω,较硝化棉分别降低5个数量级和3个数量级,达到GJB2527-1995弹药防静电要求,且制备过程中静电电位为0.20kV,较硝化棉降低77.8%,显示了良好的抗静电性能;其表观分解热为259.4J/g,较硝化棉提高81.4J/g。

Preparation of Antistatic Nitrocellulose Composite by Solvent-nonsolvent Method and Its Performance Characterization

Antistatic nitrocellulose (NC)composites were prepared by a solvent-nonsolvent method using NC and conductive filler as raw materials. Scanning electron microscopy (SEM ), volume surface resistance tester, non-contact static voltage tester and thermal analyzer were used to characterize the microstructure, antistatic properties and thermal decomposition properties of the antistatic NC composites.Results show that when the content of conductive filler in antistatic NC composite is 0 .6%,the internal conductive network distribution of the sample is uniform and integrate,and the volume resistivity and surface resistivity are 1.02×109Ω·m and 4.66× 1010Ω,respectively,which decrease by 5 orders and 3 orders compared with those of NC,reaching the requirements of antistatic for ammunition according to specification of standardization method GJB2527-1995.In the preparation process,the electrostatic potential is 0.20 kV,which reduces by 77.8% compared with NC,showing good antistatic performance.The apparent decomposition heat is 259.4J/g,improved by 81.4J/g than that of NC.