Showing papers on "Surface modification published in 1975"
Patent•
30 Oct 1975TL;DR: In this paper, surface modification of synthetic resin fiber form materials, notably polyolefin and polyacrylonitrile fiber, has been studied, whose surface has been modified by treatment with elemental fluorine and to the fluorination process.
Abstract: The present invention relates to surface modification of synthetic resin fiber form materials, notably polyolefin and polyacrylonitrile fiber form materials whose surface has been modified by treatment with elemental fluorine, and to the fluorination process.
47 citations
Patent•
11 Jun 1975TL;DR: In this article, the surface modification results from including in or affixing to the surface of the silica certain inorganic polyvalent ions, which are useful as rubber reinforcing fillers and thickening agents.
Abstract: Microfine silicas that are useful as rubber reinforcing fillers and thickening agents, and are readily dispersible are prepared by modifying the surface layer of the silica. The surface modification results from including in or affixing to the surface of the silica certain inorganic polyvalent ions.
18 citations
TL;DR: In this paper, surface modification employing acetyl chloride and acetic anhydride was studied in detail: the influence of the cellophane employed, the degree of cellophanes activation, reaction time, reagent concentration, and diluent were assessed.
Abstract: Surface acetylation of cellophane to afford an asymmetric membrane having high desalination ability (as high as 98% sodium chloride rejection) is described. The films were characterized by multiple-internal-reflectance microscopy (MIR), dyeing tests, light microscopy, and determination of water and sodium chloride transport properties in reverse osmosis cells. Surface modification employing acetyl chloride and acetic anhydride was studied in detail: the influence of the cellophane employed, the degree of cellophane activation, reaction time, reagent concentration, and diluent were assessed. Mixed acetylation reactions are also discussed as well as an evaluation of various postconditioning treatments used to increase desalination.
2 citations
TL;DR: In this article, it was shown by IR spectroscopy, elementary analysis and liquid chromatography that the treatment of porous silica with a 11% solution of trimethylchlorosilane in toluene results in practically complete methylsylation of the surface.
Abstract: It was shown by IR spectroscopy, elementary analysis and liquid chromatography that the treatment of porous silica with a 11% solution of trimethylchlorosilane in toluene results in practically complete methylsylation of the surface. Similar modification of silica gel with a large specific surface suppresses adsorption interaction in chromatography of polystyrene in apolar solvents (tetrachloromethane).
1 citations