Deposition of aminosilane coatings on porous Al2O3 microspheres by means of dielectric barrier discharges. Issue 9 (5th January 2017)

• Record Type: Journal Article
• Authors: Garzia Trulli, Marta; Claes, Nathalie; Pype, Judith; Bals, Sara; Baert, Kitty; Terryn, Herman; Sardella, Eloisa; Favia, Pietro; Vanhulsel, Annick
• Is Part Of: Plasma processes and polymers. Volume 14:Issue 9(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-01-05
• Subjects: alumina porous microspheres -- aminosilane -- atmospheric pressure glow discharges (APGD) -- powders functionalization -- transmission electron microscopy (TEM); Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.201600211
• Languages: English
• ISSNs: 1612-8850

Abstract

Abstract : Advances in the synthesis of porous microspheres and in their functionalization are increasing the interest in applications of alumina. This paper deals with coatings plasma deposited from 3‐aminopropyltriethoxysilane by means of dielectric barrier discharges on alumina porous microspheres, shaped by a vibrational droplet coagulation technique. Aims of the work are the functionalization of the particles with active amino groups, as well as the evaluation of their surface coverage and of the penetration of the coatings into their pores. A multi‐diagnostic approach was used for the chemical/morphological characterization of the particles. It was found that 5 min exposure to plasma discharges promotes the deposition of homogeneous coatings onto the microspheres and within their pores, down to 1 μm. Abstract : An atmospheric pressure DBD process is developed for the deposition of 3‐aminopropyltriethoxysilane coatings at the external surface as well as within the pores of Al2 O3 porous microspheres. The successful functionalization with amino groups is verified. After 5 min of samples exposure to plasma, a uniform 50 nm thick plasma coating is obtained on the external surface of particles and reaches 1 μm of effective penetration depth inside the pores.