聚二甲基硅氧烷

Abstract(#br)This study aims to better understand the permeation properties of polydimethylsiloxane (PDMS) membranes. The compressibility and nanofiltration fluxes were measured for swollen PDMS films using several solvents at applied pressures ranging from 5 to 50 bar. The degree of swelling varied according to the solvent and the pressure applied. To show the correlation between the behaviour of the swollen PDMS under pressure and its permeation performance, the thickness reduction of the membrane was mimicked using uniaxial compression tests.

Abstract(#br)The phosphorylation of proteins is a major post-translational modification that is required for the regulation of many cellular processes and activities. Mass spectrometry signals of low-abundance phosphorylated peptides are commonly suppressed by the presence of abundant non-phosphorylated peptides. Therefore, one of the major challenges in the detection of low-abundance phosphopeptides is their enrichment from complex peptide mixtures. Titanium dioxide (TiO 2 ) has been proven to be a highly efficient approach for phosphopeptide enrichment and is widely applied.

Abstract(#br)A superior solid-phase microextraction (SPME) fiber-coating material, IRMOF-3@ILs/PDMS, was prepared by the in situ growth of IRMOF-3 onto stainless-steel wires and protection with ionic liquids (ILs) and polydimethylsiloxane (PDMS). The ILs can efficiently prevent the substantial cracking of IRMOF-3 caused by moisture, and a thin PDMS film can protect the IRMOF-3@ILs material to achieve a much better extraction efficiency as well as excellent resistance to high temperature and high humidity.

Abstract(#br)Microfluidics-based lab-on-a-chips have many advantages, one of which is to provide physiologically relevant settings for cell biology experiments. Thus there is an ever increasing interest in their fabrication. Our goal is to construct three dimensional (3D) Controlled in vitro Microenvironments (C iv Ms) that mimic the in vivo microenvironments. Here, we present our optimized fabrication method that works for various lab-on-a-chip designs with a wide range of dimensions.

Abstract(#br)A poly(vinylidenefluoride) (PVDF) layer was obtained by casting PVDF/ N -methylpyrrolidone solution on a poly(ethylene terephthalate) non-woven sheet using phase inversion. Polydimethylsiloxane (PDMS) and phenyltrimethoxysilane (PhTMS) were cured on PVDF layer surfaces to obtain composite membranes. Multilayer polyphenylsiloxane (PPhS)/PDMS/PVDF composite membranes were prepared for butanol separation in acetone/butanol/ethanol (ABE).

Abstract(#br)The removal of H 2 S gas molecules from an environment with other gas species is an important technological challenge for a number of applications. In this work, we developed a nanocomposite catalytic membrane made of polydimethylsiloxane (PDMS) with different weight concentrations of silver (Ag) nanoparticles to reactively remove H 2 S from CH 4 and CO 2 gas streams. PDMS was chosen as a model base polymer as Ag nanoparticles could be well dispersed into its matrix.

Abstract(#br)In this work, ceramic hollow fiber supported polydimethylsiloxane (PDMS) composite membranes were developed by dip-coating PDMS layer on the surface of macroporous ceramic hollow fiber support. By controlling the properties of polymer solution and ceramic hollow fiber, high-quality ceramic hollow fiber supported PDMS composite membranes were fabricated for pervaporation (PV) recovery of bio-butanol.

Abstract(#br)We have developed a polydimethylsiloxane (PDMS) pattern with arrays of microwells for the formation of multicellular aggregates by C17.2 neural stem cells. Upon interfacing with the patterns, the neural stem cells would firstly attach to the microwell sidewalls, forming cellular strips on day 1 after plating.

Abstract(#br)Cell-sheet-engineering based regenerative medicine is successfully applied to clinical studies, though cell sheets contain uniformly distributed cells. For the further application to complex tissues/organs, cell sheets with a multi-cellular pattern were highly demanded. Micro-contact printing is a quite useful technique for patterning proteins contained in extracellular matrix (ECM). Because ECM is a kind of cellular adherent molecules, ECM-patterned cell culture surface is capable of aligning cells on the pattern of ECM.

Abstract(#br)Culture of cells using various microfluidic devices is becoming more common within experimental cell biology. At the same time, a technological radiation of microfluidic cell culture device designs is currently in progress. Ultimately, the utility of microfluidic cell culture will be determined by its capacity to permit new insights into cellular function. Especially insights that would otherwise be difficult or impossible to obtain with macroscopic cell culture in traditional polystyrene dishes, flasks or well-plates.