抗菌丙纶的制备及其性能研究

将抗菌丙纶母粒(含质量分数20％无机载银抗菌粒子)与PP进行熔融共混、切片,再通过熔融纺丝制得抗菌丙纶。扫描电镜观察经表面改性处理的无机抗菌粒子在丙纶中分散较好,大小均匀,且与PP基体具有良好的界面相容性;DSC测试表明:抗菌粒子对PP基体有异相成核作用,使PP结晶度和熔融温度略有提高;加入无机抗菌粒子,降低了丙纶的力学性能,添加量宜1％;通过改变纤维的拉伸倍数,提高抗菌丙纶的力学性能,拉伸倍数为8时,其力学性能最好;该抗菌丙纶对革兰氏阴性和阳性菌的杀菌率都大于99.9％,经水洗后仍有较好的抑菌效果,具有一定的长效抗菌性。

Preparation and properties of antibacterial polypropylene fiber

Antibacterial polypropylene fiber was prepared by melt-blending antibacterial masterbatch containing 20% inorganic silver-containing antibacterial particle by weight and polypropylene ( PP) , chipping and melt spinning. The SEM results showed that the inorganic antibacterial masterbatch subjected to surface modification had uniform dispersion in polypropylene fiber and good interfacial compatibility with polypropylene matrix. The DSC results showed that the inorganic antibacterial particles acting as a heterogeneous nucleating agent can slightly elevate the crystallinity and melting temperature, but impact the mechanical properties of PP fiber. The moderate amount of antibacterial agent was 1% . And the mechanical properties of PP fiber can be improved by changing after-drawing ratio and optimized at draw ratio of 8. The antibacterial PP fiber had antibacterial rate above 99. 9% a-gainst Escherichia coli and Staphylococcus and showed long-lasting antibacterial effect even after washing.