Sorption and pervaporation of methanol/water mixtures with poly(3-hydroxybutyrate) membranes

Villegas, Mercedes; Vidaurre, Elza F. Castro; Gottifredi, J.C.

doi:10.1016/j.cherd.2014.07.030

Cited by 37 publications

(17 citation statements)

References 59 publications

(11 reference statements)

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“…As methanol is the smallest alcohol, the methanol dehydration performance of ED-GO@PSSHF membrane was compared with those of polymeric, inorganic and GO based membranes (Fig. 6b ) 8 , 44 , 45 . For polymeric membranes, the separation factors decrease as the liquid fluxes increase, forming an upper bound depends on the flux and separation factor.…”

Section: Resultsmentioning

confidence: 99%

Strict molecular sieving over electrodeposited 2D-interspacing-narrowed graphene oxide membranes

Zeng

et al. 2017

Nat Commun

124

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To separate small molecules/species, it’s crucial but still challenging to narrow the 2D-interspacing of graphene oxide (GO) membranes without damaging the membrane. Here the fast deposition of ultrathin, defect-free and robust GO layers is realized on porous stainless steel hollow fibers (PSSHFs) by a facile and practical electrophoresis deposition (ED) method. In this approach, oxygen-containing groups of GO are selectively reduced, leading to a controlled decrease of the 2D channels of stacked GO layers. The resultant ED-GO@PSSHF composite membranes featured a sharp cutoff between C2 (ethane and ethene) and C3 (propane and propene) hydrocarbons and exhibited nearly complete rejections for the smallest alcohol and ion in aqueous solutions. This demonstrates the versatility of GO based membranes for the precise separation of various types of mixtures. At the same time, a robust mechanical strength of the ED-GO@PSSHF membrane is also achieved due to the enhanced interaction at GO/support and GO/GO interfaces.

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Section: Resultsmentioning

confidence: 99%

Strict molecular sieving over electrodeposited 2D-interspacing-narrowed graphene oxide membranes

Zeng

et al. 2017

Nat Commun

124

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“…Compared with the reported membranes, the α H2O/EtOH of TU‐GOF membrane is two orders of magnitude higher than that of the filtration GO membranes and close to that of NaA zeolite membranes (Figure S26, Supporting Information) . Furthermore, the methanol dehydration performance of the TU‐GOF membrane is far above the upper boundary of polymeric membranes, superior to that of silica membranes, and even comparable with those of classic zeolite membranes (Figure S27, Supporting Information) . It demonstrates that the TU‐GOF membrane exhibits an extraordinary exclusion effect for the primary alcohols.…”

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confidence: 77%

Self‐Assembly of Thiourea‐Crosslinked Graphene Oxide Framework Membranes toward Separation of Small Molecules

et al. 2018

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The poor mechanical strength of graphene oxide (GO) membranes, caused by the weak interlamellar interactions, poses a critical challenge for any practical application. In addition, intrinsic but large-sized 2D channels of stacked GO membranes lead to low selectivity for small molecules. To address the mechanical strength and 2D channel size control, thiourea covalent-linked graphene oxide framework (TU-GOF) membranes on porous ceramics are developed through a facile hydrothermal self-assembly synthesis. With this strategy, thiourea-bridged GO laminates periodically through the dehydration condensation reactions via NH and/or SH with OCOH as well as the nucleophilic addition reactions of NH to COC, leading to narrowed and structurally well-defined 2D channels due to the small dimension of the covalent TU-link and the deoxygenated processes. The resultant TU-GOF/ceramic composite membranes feature excellent sieving capabilities for small species, leading to high hydrogen permselectivities and nearly complete rejections for methanol and small ions in gas, solvent, and saline water separations. Moreover, the covalent bonding formed at the GO/support and GO/GO interfaces endows the composite membrane with significantly enhanced stability.

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“…However, it can be seen that the performance of the GOF-SSA membrane is beyond the upper bound of polymeric membranes, with higher water permeation flux than those of T-type zeolite and A-type zeolite membranes. [49][50][51] In summary, hydrophilic SSA was employed to interlink the GO nanosheets through esterification reaction, leading to the restricted swelling of the GOF-SSA and excellent molecular sieving ability. The hydrophilicity of the GOF-SSA was improved benefitting from the unreacted sulfonic groups.…”

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confidence: 99%

Functionalizing graphene oxide framework membranes with sulfonic acid groups for superior aqueous mixture separation

et al. 2019

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Sorption and pervaporation of methanol/water mixtures with poly(3-hydroxybutyrate) membranes

Cited by 37 publications

References 59 publications

Strict molecular sieving over electrodeposited 2D-interspacing-narrowed graphene oxide membranes

Strict molecular sieving over electrodeposited 2D-interspacing-narrowed graphene oxide membranes

Self‐Assembly of Thiourea‐Crosslinked Graphene Oxide Framework Membranes toward Separation of Small Molecules

Functionalizing graphene oxide framework membranes with sulfonic acid groups for superior aqueous mixture separation

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