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Abstract(#br)We report characterization of polydimethylsiloxane (PDMS) pervaporation membranes prepared from various conditions using the small-angle neutron scattering (SANS). The PDMS membranes were prepared by cross-linking reactions between hydroxyl terminated polydimethylsiloxane (HPDMS) and polymethylhydrosiloxane with pendant hydride (PHMS). The radius of gyration ( R g ) of HPDMS and PHMS polymer chains determined from the SANS data analysis is found to be similar with the size of about 12\u003cce:hsp sp=\"0.25\"/\u003eÅ.

Abstract(#br)Polydimethylsiloxane (PDMS) composites with different weight amounts of multi-walled carbon nanotubes (MWCNT) were synthesised as membranes to evaluate their gas separation properties. The selectivity of the membranes was investigated for the separation of H 2 from CH 4 gas species. Membranes with MWCNT concentrations of 1% increased the selectivity to H 2 gas by 94.8%. Furthermore, CH 4 permeation was almost totally blocked through membranes with MWCNT concentrations greater than 5%.

Abstract(#br)Sensing and stimulating microstructures are necessary to develop more specialized and highly accurate Organ-on-Chip (OOC) platforms. In this paper, we present the integration of a conductive polymer, poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), on a stretchable membrane, core element of an Heart-on-Chip.

Abstract(#br)A promising new polydimethylsiloxane (PDMS)/organosilica hybrid membrane has been developed and applied to the removal of sulfur from model gasoline by pervaporation. The introduction of organosilicas derived from bis(triethoxysilyl)ethane (BTESE) into the PDMS matrix led to a simultaneous improvement of permeance and selectivity of the resultant membrane.

Abstract(#br)The novel contribution of the current study is to employ adaptive neuro-fuzzy inference system (ANFIS) for evaluation of H 2 -selective mixed matrix membranes (MMMs) performance in various operational conditions. Initially, MMMs were prepared by incorporating zeolite 4A nanoparticles into polydimethylsiloxane (PDMS) and applied in gas permeation measurement. The gas permeability of CH 4 , CO 2 , C 3 H 8 and H 2 was used for ANFIS modeling.

Abstract(#br)Herein, we report a method for the fabrication of an efficient membrane for butanol recovery from dilute aqueous solution using micron-sized particles of surface modified silicalite-1 as macro-crosslinkers within a polydimethylsiloxane (PDMS) matrix. In this work, silicalite-1 of nano- and micron-sized particles were synthesized and surface modified with a range of alkyloxysilanes in the fabrication of mixed matrix membranes (MMMs) in order to minimize the undesirable voids.

Abstract(#br)Amidoxime-functionalized polydimethylsiloxane (AO-PDMSPNB) membranes with various amidoxime compositions were synthesized via ring-opening metathesis polymerization followed by post-polymerization modification. Compared to other previously reported PDMS-based membranes, the amidoxime-functionalized membranes show enhanced CO 2 permeability and CO 2 /N 2 selectivity.

Abstract(#br)Polydimethylsiloxane (PDMS) is one of the most widely used materials for the fabrication of microfluidic devices. The uncomplicated integration of ion-exchange membranes, such as Nafion ® , would facilitate manifold electrochemical processes in microfluidics. However, the Nafion ionomer does not directly bond with cross-linked PDMS and the assembly of the membrane and PDMS substrate still remains a technological challenge.

Abstract(#br)Grafting single end-tethered polymer chains on the surface of graphene is a conventional way to modify the surface properties of graphene oxide. However, grafting arc-like macromolecular bridges on graphene surfaces has been barely reported. Herein, a novel arc-like polydimethylsiloxane (PDMS) macromolecular bridges grafted graphene sheets (GO -g-Arc PDMS) was successfully synthesized via a confined interface reaction at 90 °C.

Abstract(#br)The present paper aims to use intelligent methods for prediction of gas permeation in binary-filler nanocomposite membranes containing fumed silica (FS) and octatrimethylsiloxy polyhedral oligomeric silsesquioxane (POSS) nanoparticles incorporated within a polymer matrix of polydimethylsiloxane (PDMS).