PE-UHMW微孔滤材成型工艺研究

Study on Processing Conditions of PE-UHMW Microporous Filter Materials

采用烧结法制备了超高相对分子质量聚乙烯(PE-UHMW)微孔材料,并对微孔材料的各项性能进行了分析。结果表明,采用烧结法成型的PE-UHMW粉末的颗粒与颗粒间相互堆砌,堆砌形成的间隙便是微孔形成的原因。微孔材料的性能与PE-UHMW的相对分子质量、粉末粒径、堆砌密度、烧结温度、烧结时间等因素有关。PE-UHMW的相对分子质量越大,微孔材料的压缩强度越大;粉末粒径越大,微孔材料的孔径越大;随着烧结温度和烧结时间的增加,微孔材料的孔径变小,孔径分布变宽。

Ultrahigh molecular weight polyethylene （PE-UHMW） microporous materials were prepared by sintering method, and the properties of microporous materials were studied. The forming reason of micropores was gap among particles. The properties of microporous materials were affected by molecular weight, particle size, packing density, sintering temperature and sintering time. The compressive strength of microporous materials increased with increasing molecular weight of PE-UHMW. The particle size of PE-UHMW powder decided the pore size, the bigger the particle size was, the bigger the pore size was. With increasing sintering temperature and sintering time, the pore size decreased; meanwhile the width of pore size distribution increased.