The 18th International Symposium on Electrets (ISE 18)
Virtual Conference, 24-28 September 2021, Shanghai, China
Plenary Talk

Prof. Dr. Jan van Turnhout


Affiliation: Dept. Materials Science and Engineering, Faculty 3mE, Delft University of Technology, Mekelweg 2, 2628CD Delft, The Netherlands.

Lecture Title: High density charging of microfiber filter webs for face masks and of open cell foams for ferroelectrets.

Personal CV:  Jan van Turnhout got an Ir degree in Applied Physics of the Delft University of Technology in 1962 and a PhD degree from the University of Leyden in 1972.

    After heading a Group on the Electrical Properties of Polymers, at TNO (Dutch Org. for Applied Scientific Research),  he became head of the Dept. of Polymer Physics at TNO. His research on electrets was sponsored by Royal Philips, Verto and 3M. It led to the worldwide production of electret microphones and headphones by Philips. It also led to the mass production of high efficiency electret filters (brand name “Filtrete”) by Verto (Dutch rope factory), and 3M. He further devised a method called TSD to study relaxations and charge trapping in dielectrics and developed conducting polymers and piezo-, pyro- and nonlinear optical active polymers.

     Between 1989 to 2007 he was professor in Polymer Physics at the TU-Delft, where he set up research on active functional polymers. He further focussed on the analysis of these polymers with dielectric spectroscopy. At present, he is em. professor in the Dept. Materials of Science and Engineering at the TU-Delft.

    He wrote two books, 4 chapters, more than 60 articles and over 40 conference papers, and has given many invited lectures. At ISE 14 he received the Bernhard Gross award. He  edited the papers of several conferences on electrets and dielectric phenomena. He co-chaired various International Workshops and Conferences on electrets and related phenomena. He holds several patents on the application of electrets in transducers and electret filters.