Dresden 2017 – wissenschaftliches Programm
CPP 17.5: Poster
Montag, 20. März 2017, 18:30–21:00, P1C
Nitrogen-doped graphene as an alternative to eco-toxic zinc oxide in rubbers — Yulia Glebova1,2, •Nikolai Severin1, Vladimir Shershnev2, and Jürgen P. Rabe1 — 1Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Germany — 2Moscow State University of Fine Chemical Technologies, Russia
Zinc Oxide (ZnO) is an essential ingredient of industrial rubber production, it regulates the vulcanization onset, accelerates vulcanization kinetics, and improves the mechanical properties of rubber. However, environmental pollution with ZnO is of concern, since it is recognized to be significantly eco-toxic, and it might have also adverse effects on human health. One of the major sources of ZnO environmental pollution is rubber items, in particular tires. Nitrogen (N-) doped graphene is a promising next generation catalyst comparable in its efficiency to platinum. We show that replacement of 3 phr (weight parts per hundred weight parts of polymer) of ZnO by just 0.1 phr of N-doped graphene in styrene-butadiene rubber reduces the vulcanization onset time by more than a factor of two while keeping the fast vulcanization kinetics and enhancing the tensile strength as compared to the rubber with just ZnO. Shorter vulcanization time implies saving energy, which together with the non-toxicity of N-graphene should make the resulting rubbers substantially more environmentally friendly.