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以聚丙烯纤维、聚癸二酰己二胺纤维和聚对苯二甲酸乙二醇酯纤维为研究对象,使用反相气相色谱法,以含有不同碳数的正烷烃和蒸馏水为探针分子,分别测定了合成纤维的表面自由能色散分量和水分子的净保留体积,表征其表面润湿性并分析影响因素。结果表明,纤维化学结构单元是合成纤维表面润湿性的决定性因素:具有非极性基团的聚丙烯纤维亲油性较好,具有极性基团的聚癸二酰己二胺纤维亲水性较好;纱线的线体结构影响合成纤维受热时的膨胀程度,从而显著影响表面自由能色散分量随温度的变化趋势。
Using polypropylene fiber, polyhexamethylenesebacamide fiber and polyethylene terephthalate fiber as the research objects, using reversed-phase gas chromatography, using n-alkane and distilled water containing different carbon number as probe molecules, The free energy dispersive component of the surface of the synthetic fiber and the net retention volume of the water molecules were respectively measured to characterize the surface wettability and to analyze the influencing factors. The results show that the chemical structure unit of fiber is the decisive factor of the wettability of synthetic fiber surface. Polypropylene fiber with non-polar group has better lipophilicity, hydrophilic polyhexamethylene sebacamide fiber with polar group Better; the linear structure of the yarn affects the degree of expansion when the synthetic fiber is heated, thereby significantly affecting the variation tendency of the surface free energy dispersion component with temperature.