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|Title:||Surface Energy and Lewis Acid-base Characteristics of Lignocellulosic Fibers upon Modification by Chemical Vapor Deposition of Trichloromethylsilane: An Inverse Gas Chromatography Study||Authors:||Gamelas, J. A. F.
|Keywords:||Lignocellulose; Chemical vapor deposition; Silanization; Inverse gas chromatography; Surface energy; Lewis acid-base character||Issue Date:||29-May-2018||Publisher:||Taylor & Francis||Serial title, monograph or event:||Journal of Wood Chemistry and Technology||Volume:||38||Issue:||3||Place of publication or event:||London||Abstract:||The surface of a thermomechanical pulp (TMP), containing 26 wt% of lignin, was modified by silanization with trichloromethylsilane (TCMS) via chemical vapor deposition, and thoroughly analyzed for its physicochemical properties by inverse gas chromatography (attenuated total reflection-Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy being used as complementary tools). For a 2-min TCMS-treated TMP, a decrease of the dispersive component of the surface energy from 38 to 14 mJ m−2 (at 40°C), and, at the same time, an increase of the Lewis acidic and Lewis basic characters were found. The surface of this sample, modified in a high extent, was similar to that of a bleached kraft pulp (<0.1 wt% of lignin) subjected to the same silanization process, which is suggested as being due, in both cases, to the formation of a methyl-silica coating on the fiber’s surface. The new silanized fibers obtained from cheap TMP can be used for the production of a new generation of biocomposites with a variety of matrices.||Description:||J. A. F. Gamelas, M. Azpeitia, P. J. Ferreira & A. Tejado (2018) Surface Energy and Lewis Acid-base Characteristics of Lignocellulosic Fibers upon Modification by Chemical Vapor Deposition of Trichloromethylsilane: An Inverse Gas Chromatography Study, Journal of Wood Chemistry and Technology, 38:3, 264-275, DOI: 10.1080/02773813.2018.1454961||URI:||http://hdl.handle.net/10316/79649||ISSN:||0277-3813 (Print)
|Appears in Collections:||FCTUC Eng.Química - Artigos em Revistas Internacionais|
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