Chemical and Thermal Stability of Alkylsilane Based Coatings for Membrane Emulsification

Abstract

Conclusions:The experimentally determined values of the power indices x and c describing dependence of conductivity r~f v and permittivity e~f ±c on AC frequency f in polyisoprene-carbon nanocomposite in the vicinity of percolation threshold are consistent with the general scaling principle of the percolation theory v + c = 1. The obtained values of v and c are in agreement with the mechanism of inter-cluster polarisation.The experimentally observed deviation from the relation e~|M-M C | ±s of the statistical percolation theory at carbon concentrations above the percolation threshold M > M C may be a result of particle agglomeration and deviation from statistical distribution. The asymmetric and branching shapes of particle clusters cause strong local electric fields in the matrix between clusters providing additional contribution to the dielectric permittivity.

Polymer-in-a-Silica-Crust Membranes: Macroporous Materials with Tunable Surface Functionality

“…The contact angle of all three membranes strongly increases from nearly zero for the silica-modified membranes to around 129-145°, exceeding the value of θ ) 115°found for hydrophobic smooth FOTS surfaces. 34 The difference is very likely due to surface roughness of the silica membranes that enlarges the contact angle for a hydrophobic material (often referred to as the Lotus effect 35 ). Indeed, for EVAL 44-T-FOTS, the contact angle is about 120°, much lower than for EVAL 27-T-FOTS or PES-T-FOTS (see Table 2).…”

Interfacial aspects of water drop formation at micro-engineered orifices

“…A possible way to achieve surface hydrophobicity is the deposition of self-assembled monolayers of alkyltrichlorosilanes. These kinds of monomolecular coatings are hydrophobic and they show a good thermal and chemical stability [18].…”

Isoporous Micro/Nanoengineered Membranes

“…, microporous glass). Van Rijn et al demonstrated the use of isoporous membranes for emulsification in 2004 . They employed silicon nitride membranes with extremely precise pore size ranging from 1 to 10 μm for this purpose.…”

“…Van Rijn et al demonstrated the use of isoporous membranes for emulsification in 2004. 27 They employed silicon nitride membranes with extremely precise pore size ranging from 1 to 10 μm for this purpose. Molecular sieving: Separation of biomolecules using porous gel structures either by gel filtration or by gel electrophoresis has been used widely in various biological processes.…”