Highly CO 2 /N2 selective and thermally stable Tröger’s Base PIMs (TB-PIMs) Yue Wu , Ariana R. Antonangelo, Natasha Hawkins, and Mariolino Carta Swansea University, UK Polymers of Intrinsic Microporosity (PIMs) represent a relatively new class of porous materials developed over the last two decades. 1 Their unique “intrinsic” microporous structure has received great attention from researchers for applications such as gas separation and storage, organic adsorption and others. 2,3 Although they are not typically designed to be heat-resistant, previous research shows that PIMs posses excellent thermal stability 4 and that suggests that, along with good gas adsorption, they could have a great potential as flame retardant materials. In fact, good porosity and low carbon-to-nitrogen ratio have been confirmed to enhance flame retardancy and adsorption of CO 2 . 5,6 The objective of this work is to prepare PIMs that can be applied as both additives for flame retardant materials and for CO 2 capture. In this context, the subclass of TB-PIMs, may come very useful. The TB core has a rigid V-shaped conformation produced by bridged nitrogens, 7 which is typical of highly porous PIMs. In this work, it will be combined with the hexaphenylbenzene (HPB) structure ( Figure 1 ). The latter can be adorned 2, 4 or 6 amino- groups, so that we can tune the C/N ratio per repeated unit of the polymer modulating the flame retardancy of the final material. The results shown on this work, not only, demonstrate the feasibility of using hexaphenylbenzene- Tröger’s base PIMs (HPB-TB-PIMs) as flame retardant materials, but also that the design of these new monomers lead to the further enhancement of their gas separation and capture ability.
Figure 1 . possible TB-HPB-PIMs References 1. P. M. Budd, B. Ghanem, K. Msayib, N. B. McKeown and C. Tattershall, J. Mater. Chem. , 2003, 13 , 2721-2726. 2. H. Shamsipur, B. A. Dawood, P. M. Budd, P. Bernardo, G. Clarizia and J. C. Jansen, Macromolecules , 2014, 47 , 5595-5606. 3. B. Satilmis and P. M. Budd, J Colloid Interface Sci , 2017, 492 , 81-91. 4. B. Satilmis and P. M. Budd, RSC Adv. , 2014, 4 , 52189-52198. 5. H. Wei, F. Wang, H. Sun, Z. Zhu, C. Xiao, W. Liang, B. Yang, L. Chen and A. Li, Journal of Materials Chemistry A , 2018, 6 , 8633-8642. 6. L. Zou, Y. Sun, S. Che, X. Yang, X. Wang, M. Bosch, Q. Wang, H. Li, M. Smith and S. Yuan, Advanced materials , 2017, 29 , 1700229. 7. M. Carta, M. Croad, J. C. Jansen, P. Bernardo, G. Clarizia and N. B. McKeown, Polym Chem-Uk , 2014, 5 , 5255-5261.
P128F
Made with FlippingBook Learn more on our blog