添加剂用量对聚醚砜涂层熔喷布结构及性能影响研究

Influence of Additive Dosage on Structure and Properties of Polyethersulfone-coating Meltblown Fabric

为提高聚醚砜(PES)熔喷非织造布的亲水性能,采用聚环氧乙烷(PEO)和甲基丙烯酸甲酯(HEMA)与铸膜液共混的方式,通过相转化法及刮覆涂层的方法制备聚醚砜涂层熔喷布。对PES涂层熔喷布亲水性能,过滤性能以及孔径大小进行测试分析,并通过扫描电镜观察PES涂层熔喷布的微观结构。结果表明,PES涂层熔喷非织造布的接触角、水通量、孔隙率、平均孔径、截留率、微观形貌等各项性能均随着PEO质量分数的增加有明显提升,而随着HEMA质量分数的增加先是提高后因为HEMA质量分数增加使得铸膜液黏度增加各项性能有所下降。在铸膜液中添加PEO可以提高过滤膜的亲水性能,当PEO的质量分数大于8%,其接触角在60.89°,截留率达到90.1%以上,有较好的过滤性能;而在铸膜液中添加HEMA的过滤膜在HEMA质量分数为8%的时候,接触角最小为62.31°,有最佳的亲水性能。

To improve the hydrophilic properties of polyethersulfone(PES)meltblown nonwoven fabric,PES-coating meltblown fabric was prepared with phase inversion method and scraping coating by blending polyethylene oxide(PEO)and methyl methacrylate(HEMA)with casting solution.The hydrophilic properties,filtration performance and pore size of PES-coating meltblown fabric were tested and analyzed.The microstructure of PES-coating meltblown fabric was observed under scanning electron microscopy.The results show that the properties(contact angle,water flux,porosity,average pore size,retention rate and microscopic morphology)of PES-coating melt-blown nonwoven fabric are obviously enhanced with the increase of mass fraction of PEO,and are enhanced first and then degraded with the increase of mass fraction of HEMA for the increase of mass fraction of HEMA increases the viscosity of casting solution.The addition of PEO to casting solution can improve the hydrophilicity of filtration membrane.Under the conditions of mass fraction of PEO larger than 8%,contact angle of 60.89°,and retention rate above 90.1%,the filtration performance is good.Under the conditions of mass fraction of PEO of 8%and the minimum contact angle of 62.31°,filter membrane with HEMA added to the casting solution achieves the best hydrophilicity.