1. The Royal Institute of Technology (KTH)Department of Fibre and Polymer Technology Teknikringen 56–58 10044 Stockholm Sweden
2. ETH ZürichDepartment for Chemistry and Applied Biosciences Vladimir‐Prelog‐Weg 1 CH 8093 Zürich Switzerland
3. Dipartimento di Scienza Applicata e TecnologiaPolitecnico di Torino C.so Duca degli Abruzzi 24 10129 Torino Italy