石墨烯改性聚丙烯复合滤料的制备及其过滤性能

Preparation and filtration of graphene modified MS composite filter

针对现有PM2.5滤料使用寿命短等问题,制备了石墨烯改性聚丙烯复合滤料。首先采用改进Hummers法制备氧化石墨烯,并用原子力显微镜、X射线衍射仪和拉曼光谱对其进行表征,结果表明成功制备出高单片层率的氧化石墨烯;然后将氧化石墨烯与聚丙烯非织造材料复合,制备石墨烯改性聚丙烯复合滤料,并表征复合滤料的结构和过滤性能。结果表明:复合使滤料对2.0μm以下微粒的过滤效果增强,且浓度每提升一个等级,过滤效率平均提升5%。浸渍浓度为0.8g/L的MS-8滤料过滤效率最高,与原样相比过滤效率平均提升了8.9%,其过滤阻力仅提高了6Pa,透气率降低了4mm/s。

A graphene modified MS composite filter material was prepared according to the short service life of existing anti-fog mask.Graphene oxide was prepared by modified hummers method and characterized by atomic force microscopy,X-ray diffraction and raman spectroscopy.The results showed that graphene oxide with high monolayer rate was successfully prepared.Then graphene oxide and polypropylene MS were prepared.The composite of non-woven materials was prepared,and the graphene modified MS composite filter was prepared.The structure and filtration performance of composite filter were characterized.The results showed that the addition of graphene enhanced the filtration effect of filter on particles below 2.0μm,and the concentration was increased.At one level,filtration efficiency increased by an average of 5%.MS-8 filter with immersion concentration of 0.8 g/L had the highest filtration efficiency,and the filtration efficiency was increased by 8.9% on average compared with the original sample.The filtration resistance was only increased by 6 Pa and the gas permeability was reduced by 4 mm/s.