Surfaces chemical functionalities

The chain architecture and chemical structure could be modified by SCVCP leading to a facile, one-pot synthesis of surface-grafted branched polymers. The copolymerization gave an intermediate surface topography and film thickness between the polymer protrusions obtained from SCVP of an AB inimer and the polymer brushes obtained by ATRP of a conventional monomer. The difference in the Br content at the surface between hyperbranched, branched, and linear polymers was confirmed by XPS, suggesting the feasibility to control the surface chemical functionality. The principal result of the works is a demonstration of utility of the surface-initiated SCVP via ATRP to prepare surface-grafted hyperbranched and branched polymers with characteristic architecture and topography. [Pg.28]

The objectives of this paper are to demonstrate how monolayer adsorption isotherms can be obtained on carbon fiber surfaces by inverse gas chromatography (IGC), and to compare results of solid/gas adsorption with those of solid/Uquid wetting. This information is correlated with independent assessments of surface chemical functionality provided by wet chemical titrations and x—ray photoelectron spectroscopy (XPS). [Pg.204]

The chemical nature of the surface for a given liquid, the immersion energy depends on the chemical nature of the surface if the liquid is polar, the immersion energy increases with the polarity of surface chemical functions (applications study of the influence of a heat treatment on the quality and amount of surface chemical functions, study of wettability). [Pg.282]

Structured surfaces that exhibit superhydrophobicity can also show an effect known as hemiwicking or superwetting if they are surface-chemically functionalized to be hydrophilic. Hemi-wicking is complete wetting due to the presence of capillary forces in two dimensions. ... [Pg.440]

Self-assembled monolayers (SAMs) of alkanethiolates on metal surfaces constitute a class of molecular assemblies formed by the spontaneous chemisorption of long-chain functionalized molecules on the surface of solid substrates. Due to their ease of preparation, long-term stability, controllable surface chemical functionality, and high, crystal-like, two-dimensional order, SAMs represent suitable model surfaces to study molecular adsorption, adhesion, wetting, lubrication, and the interaction of proteins and cells with artificial organic surfaces. The latter phenomena are of crucial importance to the fields of biomaterials, biosensors, and medical devices. [Pg.636]

Shen W, Li Z, Yiong LY (2008) Surface chemical functional groups modification of porous carbon. Recent Patents... [Pg.372]

If we set out to unravel surface chemical functionalities with high spatial resolution down to atomic detail, we also encounter various practical (technical) problems. It is fair to say that the technique development for direct space analysis (again, we exclude Fourier space methods) is still lagging much behind. Chemical force microscopy can be considered as a first step in the direction of a true description of surface chemical functionalities with high spatial resolution in polymers, primarily based on the chemically sensitive analysis of AFM data via adhesion mapping. At this point the detailed theory for force spectroscopy is not developed beyond the description of London forces. The consideration of the effect of polar functional groups in force spectroscopy (similar to difficulties with solubihty parameter and surface tension approaches for polar forces, as well as specific interactions) is still in its infancy. Instead, one must still rely on continuiun contact mechanics to couple measured forces and surface free energies. [Pg.121]

Silva JF, Pavez J, Silva CP, Zagal JH (2013) Electrocatalytic activity of modified gold electrodes based on self-assembled monolayers of 4-mercaptopyridine and 4-aminothiophenol on Au(lll) surfaces chemically functionalized with substituted and unsubstituted iron phthalocyanines. Electrochim Acta 114 7-13... [Pg.322]

Surface Chemical Functionalization of Sol-Gel Materials and Ceramics for MOF Technology... [Pg.475]

Li, Y. X. Ito, T. Surface chemical functionalization of cylindrical nanopores derived from a polystyrene— Poly(methylmethacrylate) diblock copolymer via amidation. Langmuir 2008, 24, 8959-8963. [Pg.426]

Effect of surface chemical functionalization of the adhesion of an epoxy to modified polyethylene surfaces ... [Pg.172]

Surface chemical functionality Butt tensile strength (MPa)... [Pg.172]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...