http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Thirion, D.,Rozyyev, V.,Park, J.,Byun, J.,Jung, Y.,Atilhan, M.,Yavuz, C. T. The Royal Society of Chemistry 2016 Physical chemistry chemical physics Vol.18 No.21
<P>Liquid, solvated amine based carbon capture is the core of all commercial or planned CO2 capture operations. Despite the intense research, few have looked systematically into the nature of amine molecules and their CO2 interaction. Here, we report a systematic introduction of linear ethylene amines on the walls of highly porous Davankov type network structures through simple bromination intermediates. Surprisingly, isosteric heats of CO2 adsorption show a clear linear trend with the increase in the length of the tethered amine pendant groups, leading to a concerted cooperative binding with additional H-bonding contributions from the unassociated secondary amines. CO2 uptake capacities multiply with the nitrogen content, up to an unprecedented four to eight times of the starting porous network under flue gas conditions. The reported procedure can be generalized to all porous media with the robust hydrocarbon framework in order to convert them into effective CO2 capture adsorbents.</P>
Mines, P.D.,Thirion, D.,Uthuppu, B.,Hwang, Y.,Jakobsen, M.H.,Andersen, H.R.,Yavuz, C.T. Elsevier 2017 Chemical engineering journal Vol.309 No.-
Nanoporous networks of covalent organic polymers (COPs) are successfully grafted on the surfaces of activated carbons, through a series of surface modification techniques, including acyl chloride formation by thionyl chloride. Hybrid composites of activated carbon functionalized with COPs exhibit a core-shell formation of COP material grafted to the outer layers of activated carbon. This general method brings features of both COPs and porous carbons together for target-specific environmental remediation applications, which was corroborated with successful adsorption tests for organic dyes and metals.
Reversible water capture by a charged metal-free porous polymer
Byun, J.,Patel, H.A.,Thirion, D.,Yavuz, C.T. Elsevier 2017 Polymer Vol.126 No.-
<P><B>Abstract</B></P> <P>Climate change and industrial pollution threatens the availability of clean water. Although established protocols of water treatment exist, water capture by porous materials has emerged as a viable alternative to energy intensive processes. Here we introduce a new charged porous polymer that is capable of capturing and releasing water by simple humidity or temperature swings. The quaternary amines on the framework structure attract water molecules and further solvate by coordination. The porosity of the network structure also provides enough void where water can diffuse throughout the solid. Water uptake capacity of the porous polymer surpasses common desiccants like silica gel and molecular sieves, and has the potential to act as an organic desiccant in applications like electronics or food packaging.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A new charged porous polymer that captures water from atmosphere reversibly. </LI> <LI> The maximum water uptake capacity reaches up to 72 wt% at RH 90%. </LI> <LI> The cyclic water uptake performance excels that of commercial desiccants. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>3D graphical illustration of water adsorbing porous polymer, COP-120.</P> <P>[DISPLAY OMISSION]</P>