Now showing items 61-70 of 2255
Simple citric acid-catalyzed surface esterification of cellulose nanocrystals
A simple straightforward route for the surface esterification of cellulose nanocrystals (CNC) is herein proposed. CNC obtained from microcrystalline cellulose were acetylated using as catalyst citric acid, a α-hydroxy acid ...
Compatibilization and properties of EVA copolymers containing surface-functionalized cellulose microfibers
(Wiley Vch Verlag, 2010-08-16)
Cellulose microfibers were modified with two different bi-functional monomers. Composites of EVA copolymer with modified and unmodified cellulose were prepared by melt mixing. The samples were analyzed by SEM, XRD, FT-IR, ...
Mechanical and tribological properties of a-C:H:F Thin Films
a-C:H films were grown by plasma-enhanced chemical vapor deposition in atmospheres composed by 30 % of acetylene and 70 % of argon. Radiofrequency signal (RF) was supplied to the sample holder to generate the depositing ...
XPS investigation of plasma-deposited polysiloxane films irradiated with helium ions
This work describes an XPS investigation of plasma-deposited polysiloxane films irradiated with 170 keV He+ ions at fluences, Phi, ranging from 1 x 10(14) to 1 x 10(16) cm(-2). Modifications in the atomic concentrations ...
Study of polypropylene surface modification by air dielectric barrier discharge operated at two different frequencies
In this work, air dielectric barrier discharge (DBD) operating at the line frequency (60 Hz) or at frequency of 17 kHz was used to improve the wetting properties of polypropylene (PP). The changes in the surface hydrophilicity ...
Inactivation of vesicular stomatitis virus through inhibition of membrane fusion by chemical modification of the viral glycoprotein
Membrane fusion is an essential step in the entry of enveloped viruses into their host cells triggered by conformational changes in viral glycoproteins. We have demonstrated previously that modification of vesicular ...
Determination of Cu, Ni and Pb in Aqueous Medium by FAAS after Pre-Concentration on 2-Aminothiazole Modified Silica Gel
This work describes the synthesis and characterization of 2-aminothiazole modified silica gel (SiAT), and the results of a study of the adsorption and pre-concentration (in batch and using a flow-injection system coupled ...
Chemical Modification of Palm Fibres Surface with Zirconium Oxychloride
(North Carolina State Univ Dept Wood & Paper Sci, 2014)