远程动态等离子体可控修饰聚丙烯纤维膜

Based on the exploration of the long-distance and dynamic characteristics of plasma, the PP fibril membranes were modified by long-distance and dynamic plasma treatment and subsequent grafted in acrylic acid (AA) solutions. FTIR-ATR spectrum, XPS spectrum and FESEM were used to characterize the chemical and morphology changes resulting from this modification. The grafting degree and pure water flux as a function of grafting conditions and plasma parameters were also discussed. The results show that some AA could be detected on the upstream surface of the second membrane layer after plasma treatment of two stacked PP fibril membrane layers and subsequent AA grafted . This suggests that the active specious in plasma flow could penetrate through the PP fibril membrane, and the internal/cross-section grafting of membranes initiated by dynamic plasma flow is significantly superior to the one induced by static plasma. The results of grafting degree and pure water flux as a function of grafting conditions and plasma parameters illustrate that long-distance and dynamic plasma could implement controllable modification. In the present investigation, grafting of hydrophilic monomer, AA, onto the membrane surface caused the increasing in pure water ux from 732 kg/(m2oh) to 1763 kg/(m2oh) in 25 ℃ and 0.03 MPa..