Showing papers on "Surface modification published in 1977"
TL;DR: In this paper, the authors show that an increase of the surface density of functional groups up to the value of 0.2 × 10 14 sites/cm 2 leads to a rapid increase in wettability of PET films.
37 citations
TL;DR: In this paper, the authors investigated the influence of surface modification of silica gel on their adsorption behavior and proposed a new term "architecture of adorption centers" to describe the surface properties and structure of chemically modified adsorbents.
32 citations
TL;DR: The behavior of composite structures has involved the discipline of classical fracture mechanics as discussed by the authors, where the orientation of polymeric species or additives which migrate to the interface may modify the wetting characteristics and, most certainly, the frictional properties in addition to the diffusion of penetrant species beyond the boundary layer.
Abstract: The, nature of polymer surfaces has received increasing attention as the use of these materials, in a variety of forms, increases yearly. Modifications of polymer surfaces for adhesion, friction, and diffusion oriented appiications have necessitated a careful analysis of the surfade region morphology (surface physics) and chemical properties of the surface layer (surface chemistry). The behavior of composite structures has involved the discipline of classical fracture mechanics. The orientation of polymeric species or additives which migrate to the interface may modify the wetting characteristics and, most certainly, the frictional properties in addition to the diffusion of penetrant species beyond the boundary layer. The above topics are discussed within the framework of recent analytical and theoretical developments in surface science. The findings of these recent studies have facilitated many exciting technological advances.
24 citations
Patent•
14 Sep 1977TL;DR: The properties of the silane-zeolite composite are surprisingly similar to those of the zeolite without the surface modification of a silane as mentioned in this paper, and these composites are useful in numerous applications of zeolites, particularly in aqueous environments.
Abstract: Hydrophilic, silane-zeolite compositions, their preparation, properties and applications are disclosed. These unique composites are formed by condensing a hydrophilic silane onto the surface of a hydrated zeolite. The properties of the silane-zeolite composite are surprisingly similar to those of the zeolite without the surface modification of the silane. These composites are useful in numerous applications of zeolite, particularly in aqueous environments. The composites are particularly suited to be included in detergent compounds as the builder since they do not agglomerate with other detergent ingredients as do zeolites.
24 citations
TL;DR: In this article, the electrochemical characteristics of chemically modified glassy carbon electrodes via amide bonds have been correlated with the results of surface analysis by X-ray photoelectron spectroscopy (ESCA).
Abstract: The electrochemical characteristics of chemically modified glassy carbon electrodes via amide bonds have been correlated with the results of surface analysis by X-ray photoelectron spectroscopy (ESCA). The double layer capacitance measurements were proved to be useful to determine the extent of surface modification as well as ESCA analysis.
22 citations
18 citations
TL;DR: In this paper, a comparison of different techniques for modifying internal glass surfaces to accept a substrate loading on wall coated open tubular columns (WCOT) was examined, and the columns were evaluated for efficiency, acidic-basic and adsorption properties, thermal stability and coating efficiency.
Abstract: Comparison of different techniques for modifying internal glass surfaces to accept a substrate loading on wall coated open tubular columns (WCOT) were examined. Inner surfaces pretreated with a non-extractable Carbowax 20M layer, barium carbonate and silica whiskers were prepared and coated with a Carbowax 20M liquid phase. The columns were evaluated for efficiency, acidic-basic and adsorption properties, thermal stability and coating efficiency. Column performances were also assessed for deactivated surfaces. Each column was applied to a standard mixture of Aroclor 1016.
14 citations
TL;DR: In this paper, the incorporation of nitrogen into atomically clean iron at room temperature is discussed as an example of clean surface modification, resulting in significant enhancement of resistance to corrosion at room-temperature in dry and moist air, relative to intially air-exposed samples.
13 citations
10 citations
3 citations
TL;DR: The Chemical Physics of Surfaces as mentioned in this paper, by S. Roy Morrison. Pp. xii + 415 + 415. (Plenum: New York and London, 1977).
Abstract: The Chemical Physics of Surfaces. By S. Roy Morrison. Pp. xii + 415. (Plenum: New York and London, 1977.) $47.40.
Patent•
06 May 1977
TL;DR: In this article, the surface properties of graphite polyfluoride (GPF) were modified by chemical or mechanical grafting of polymers or organic or inorganic functional gps, or by mixing the GPF with polymers.
Abstract: The lubricating properties of graphite polyfluoride (GPF) are improved by modifying the surface by chemical or mechanical grafting of polymers or organic or inorganic functional gps., or by mixing the GPF with polymers. The process allows surface properties (film forming power, surface energy, adhesion, etc.) to be modified without affecting intrinsic properties (lamellar structure and shearing strength). In an example, a suspension of degassed GPF in a mixt. of toluene and THF was treated with BuLi. After several hrs., the product was washed with a polar solvent. The product was black and showed no change in particle shape.