Surface Characterization of Polysaccharides, Lignins, Printing Ink Pigments, and Ink Fillers by Inverse Gas Chromatography

✍ Scribed by Mohamed Naceur Belgacem; Anne Blayo; Alessandro Gandini

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 98 KB
• Volume: 182
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0484

✦ Synopsis

polymers (carbon (3), wood (4), aramide (5), glass (6), Inverse gas chromatography (IGC) was used to determine the and cellulose fibers (7) and powders of cellophane (8) and dispersive contribution to surface energy of three families of fipolyethylene terephthalate ( 9)) has been reported in the litbrous or powder-like materials: (i) polysaccharides; (ii) lignins erature. The results obtained were entirely satisfactory and from different sources; and (iii) printing ink pigments and ink IGC has thus become a useful and reliable analytical method fillers. The dispersive component of unpurified alpha hardwood because of its relative rapidity, simplicity, and good accucellulose was found to be close to 32 mJrm 02 . This parameter racy, as well as the relatively low cost and availability of increased substantially (up to 50%) when fibers were purified by the equipment associated with its practice, essentially a gas acetone extraction or by corona treatment using a current dischromatograph. charge of 40 mA. The surface properties of other polysaccharides, namely starch, chitin, and two chitosans with different degrees of

The major strategy of our laboratory is centered upon acetylated groups, were also investigated. Except for the sodaoriginal ways to valorize renewable resources by elaborating anthraquinone lignins, which showed the highest dispersive comnovel polymeric materials. These include thermoplastics, ponent of surface energy (115.6 mJrm 02 ), other lignins, namely thermosetting resins, modified fibrous constituents, and kraft, steam-explosion, and organosolv materials, showed very oligomers for highly viscous materials such as offset printing similar dispersive properties (45 to 49 mJrm 02 ). As expected, inks.

lignosulfonates displayed a higher dispersive energy of about 67

Recently, the elaboration of composite materials con-mJrm 02 . The study of printing ink pigments and ink fillers sugtaining cellulosic fibers has gained renewed interest (10, gested that carbon black and calcium carbonate used for that 11) because the resulting materials display good mechanical purpose must have been subjected to a specific treatment in order properties coupled with low density and complete combustito increase their surface energy. The dispersive component of the bility. Lignins can be usefully applied as fillers, e.g., in surface energy of other pigments, viz., red, yellow, blue, and white powders, was close to 40 mJrm 02 .