This week’s Engineering Research Center-Bioengineering Joint Seminar, Friday February 7, 11 a.m., McNair Hall, Auditorium:
Topic: Electrospun Meta-aramid Mats and Their Application
Speaker: Dr. Hak Yong Kim, Professor of Bio-Info-Nano Fusion Technology and Professor of Organic Materials and Fiber, Chonbuk National University, Jeonbuk, Korea. Dr. Kim’s areas of research include biomaterials, polymeric composites and functional materials. He has 245 refereed journal publications with a total of over 5,200 citations. He holds 6 U.S. patents and 80 Korean patents.
Abstract: The effect of salt formation during condensation polymerization on the morphology of electrospun meta-aramid fibers was investigated. The presence of a by-product salt (calcium chloride, CaCl2) improved the electrospinnability of the meta-aramid solution and induced the formation of a spider-web-like structure in the mats.
The effect of the concentration of the solution and applied voltage on the formation of the spider-web-like fibrous structure was investigated. FE-SEM images indicated that the very thin fibers were uniformly distributed with thick fibers throughout the mats in the form of a spider-web-like structure. TGA showed that the thermal stability of the electrospun meta-aramid mats was affected by CaCl2.
The observed enhancement in the thermal and mechanical properties of the mats, which was attributed to the formation of the spider-web-like structure, may increase the number of potential applications of meta-aramid, such as second battery separator, water/air filtration, protective clothing and electrical insulation.