Lainioti Georgia Ch, Bounos Giannis, Voyiatzis George A, Kallitsis Joannis K
Department of Chemistry, University of Patras, GR-265 04 Rio-Patras, Greece.
Foundation for Research and Technology Hellas-Institute of Chemical Engineering Sciences (FORTH-ICEHT), P.O. Box 1414, GR-265 04 Rio-Patras, Greece.
Polymers (Basel). 2016 May 12;8(5):190. doi: 10.3390/polym8050190.
A novel concept for the use of an immiscible and non-meltable polymer, such as sodium polystyrene sulfonate (PSSNa), in order to prepare polyethylene non-woven breathable membranes is described. Membranes were fabricated by melt compounding of properly functionalized PE (P(E--AA)) and PSSNa (P(SSNa--GMA)) copolymers in the presence of water soluble polyethylene glycol (PEG). The inability of PSSNa derivatives to be melted was overcome by using PEG, which was easily meltable thus inducing PSSNa processability improvement. PEG was removed after membrane fabrication and therefore also acted as a porogen. Carbon nanotubes, functionalized with PSSNa moieties or alkyl groups, were also incorporated in the membranes with the aim of improving the porous connectivity and increasing the water vapor transmission rate. The morphology of the membranes was investigated through Scanning Electron Microscopy (SEM). Water vapor transmission rate (permeation) (WVTR) measurements for the porous membranes showed increased values in comparison with the neat PE ones. A further increase of WVTR was observed with the addition of CNTs to the polymer membranes.
描述了一种使用不混溶且不可熔融的聚合物（如聚苯乙烯磺酸钠（PSSNa））来制备聚乙烯非织造透气膜的新方法。通过在水溶性聚乙二醇（PEG）存在下将适当官能化的PE（P（E-AA））和PSSNa（P（SSNa-GMA））共聚物进行熔融共混来制备膜。通过使用易于熔融的PEG克服了PSSNa衍生物不可熔融的问题，从而提高了PSSNa的加工性能。PEG在膜制备后被去除，因此也起到了致孔剂的作用。用PSSNa部分或烷基官能化的碳纳米管也被掺入膜中，目的是改善多孔连通性并提高水蒸气透过率。通过扫描电子显微镜（SEM）研究了膜的形态。对多孔膜的水蒸气透过率（渗透率）（WVTR）测量表明，与纯PE膜相比，其值有所增加。在聚合物膜中添加碳纳米管后，观察到WVTR进一步增加。
