期刊
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
卷 38, 期 3, 页码 264-275出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/02773813.2018.1454961
关键词
Lignocellulose; chemical vapor deposition; silanization; inverse gas chromatography; surface energy; Lewis acid-base character
The surface of a thermomechanical pulp (TMP), containing 26wt% 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 14mJ m(-2) (at 40 degrees 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 (<0.1wt% 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.
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