000109611 001__ 109611
000109611 005__ 20220208123553.0
000109611 0247_ $$2doi$$a10.1016/j.carbon.2016.02.037
000109611 0248_ $$2sideral$$a125079
000109611 037__ $$aART-2016-125079
000109611 041__ $$aeng
000109611 100__ $$aShin, Yoyoung
000109611 245__ $$aSynthesis and characterization of composite membranes made of graphene and polymers of intrinsic microporosity
000109611 260__ $$c2016
000109611 5060_ $$aAccess copy available to the general public$$fUnrestricted
000109611 5203_ $$aPolymers of intrinsic microporosity (PIMs) are a group of polymers with molecular sieve behaviour due to their rigid, contorted macromolecular backbones. They show great potential in organophilic pervaporation, solvent-resistant nanofiltration and gas and vapour separations. However, they are susceptible to physical ageing, leading to a reduction in permeability over time. An improvement in membrane permeability, control over diffusion selectivity and a reduction of the effect of physical ageing is expected by adding graphene as a nanofiller.
Little is experimentally known about how the material disperses in the polymer. Here we used Raman spectroscopy, scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) to study the composite membrane's structure. Our results show that both STEM and Raman spectroscopy are able to identify the presence of graphene-based material in the composite. We show that STEM, through medium angle annular dark field (MAADF) or EELS imaging, can be exploited to obtain information on the morphology and the thickness of the flakes. Our results indicate that there is strong re-agglomeration of initially exfoliated graphene in solution when forming the composite. This is expected to produce strong changes in the mechanical properties and the physical ageing of the membrane.
000109611 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000109611 590__ $$a6.337$$b2016
000109611 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b32 / 275 = 0.116$$c2016$$dQ1$$eT1
000109611 591__ $$aCHEMISTRY, PHYSICAL$$b23 / 145 = 0.159$$c2016$$dQ1$$eT1
000109611 592__ $$a2.091$$b2016
000109611 593__ $$aChemistry (miscellaneous)$$c2016$$dQ1
000109611 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000109611 700__ $$aPrestat, Eric
000109611 700__ $$aZhou, Kai-Ge
000109611 700__ $$0(orcid)0000-0002-6905-714X$$aGorgojo, Patricia
000109611 700__ $$aAlthumayri, Khalid
000109611 700__ $$aHarrison, Wayne
000109611 700__ $$aBudd, Peter
000109611 700__ $$aHaigh, Sara
000109611 700__ $$aCasiraghi, Cinzia
000109611 773__ $$g102 (2016), 357 - 366$$pCarbon$$tCarbon$$x0008-6223
000109611 8564_ $$s3051383$$uhttps://zaguan.unizar.es/record/109611/files/texto_completo.pdf$$yVersión publicada
000109611 8564_ $$s2593646$$uhttps://zaguan.unizar.es/record/109611/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000109611 909CO $$ooai:zaguan.unizar.es:109611$$particulos$$pdriver
000109611 951__ $$a2022-02-08-11:20:13
000109611 980__ $$aARTICLE