基于熔喷非织造技术,以流动性助剂/尼龙6(H-30/PA6)共混体系为主要原料,研究了助剂含量、温度对共混体系流变性能及热性能作用机制,并成功制备PA6熔喷非织造材料。结果表明,流动性助剂含量对共混体系的最大分解速率对应温度(Tmax)、熔融温度无影响,但可提升纤维的结晶度。当流动性助剂质量分数为7%时,PA6共混体系熔融指数达到286g/10min;剪切速率在0～3000s-1范围内时,共混体系表观黏度下降了47.73%;黏流活化能在720～4510s-1范围内降低了22.77%。流动性助剂的加入提升了PA6的流动性能,降低了PA6熔喷材料的制备难度,利用PA6共混体系制备的H-30/PA6熔喷布呈现经典的三维网状结构,纤维的直径在2～4μm,分布概率约为60%。
Based on melt-blown nonwoven technology,polyamide 6 (PA6) melt-blown nonwoven materials were successfully prepared using a fluidity additives/PA6 (H-30/PA6) blending system as the main raw material,with a focus on the effects of additive content and temperature on the rheological properties and thermal behavior of the blending system.The results revealed that the fluidity additive content had no significant impact on the temperature corresponding to the maximum decomposition rate (Tmax) and melting temperature of the blending system but enhanced the crystallinity of the fibers.At a 7wt% fluidity additives loading,the melt flow index of the PA6 blending system reached 286 g/10 min.The apparent viscosity decreased by 47.73% within a shear rate range of 0～3000s-1.The viscous flow activation energy was reduced by 22.77% in the shear rate range of 720～4510s-1.The incorporation of the fluidity additives significantly improved the melt processability of PA6,reducing the fabrication complexity of melt-blown materials.The resultant H-30/PA6 melt-blown fabric exhibited a classic three-dimensional network structure,with fiber diameters ranging from 2～4μm and a diameter distribution probability of 60%.
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基金资助
中国博士后科学面上基金项目(2021M691965)
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