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Effect of processing conditions on the cellular morphology of polyethylene hollow fiber foams for membrane applications
Cellular Polymers ( IF 1.3 ) Pub Date : 2018-07-01 , DOI: 10.1177/0262489318795967
Zahir Razzaz 1, 2, 3 , Abolfazl Mohebbi 1, 2, 3 , Denis Rodrigue 1, 2, 3
Affiliation  

A continuous method without any solvent is proposed to produce porous hollow fibers for membrane (HFM) applications. In this case, linear low-density polyethylene was combined with azodicarbonamide to produce samples via extrusion. In particular, the processing (chemical blowing agent content and temperature profile) and post-processing (stretching velocity) conditions were optimized to obtain a cellular structure having a high cell density and uniform cell size distribution. From the samples obtained, a complete set of characterization was performed (morphological, mechanical, physical, and gas transport). The results show that HFM having a higher cell density can increase gas permeability, especially for hydrogen. Overall, it is shown that low-cost polyolefins having a suitable cellular structure can be used for gas separation membranes.

中文翻译:

加工条件对膜用聚乙烯中空纤维泡沫泡孔形态的影响

提出了一种没有任何溶剂的连续方法来生产用于膜 (HFM) 应用的多孔中空纤维。在这种情况下,线性低密度聚乙烯与偶氮二甲酰胺结合以通过挤出生产样品。特别是,优化了加工(化学发泡剂含量和温度分布)和后加工(拉伸速度)条件,以获得具有高泡孔密度和均匀泡孔尺寸分布的泡孔结构。从获得的样品中,进行了一套完整的表征(形态、机械、物理和气体传输)。结果表明,具有更高单元密度的 HFM 可以增加气体渗透性,尤其是对于氢气。总之,表明具有合适多孔结构的低成本聚烯烃可用于气体分离膜。
更新日期:2018-07-01
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