Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 292, Issue 1, Pages 56-62Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2006.06.008
Keywords
nanoparticle coating; lignocellulose fibers; paper; nanoassembly
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The layer-by-layer (LbL) self-assembly technique was applied to deposit organized multilayers of TiO2 or SiO2 nanoparticles of 30-80nm diameter, and 50-nm diameter halloysite clay nanotubes on softwood fibers. Fluorescent and scanning electron microscopy images showed complete nanoparticle coating on these fibers. The thickness of the two-layer coating was estimated as 46, 58, and 115 nm for TiO2, SiO2, and halloysite tubules, respectively, which corresponds to ca. 1 wt% nanoparticle loading of the fibers. The brightness test of paper handsheets prepared from nanocoated fibers showed that TiO2 nanoparticle coating gave handsheet reflectance of 84% at 450 nm, which is 4% higher than the brightness of the control sample from virgin fibers. The paper handsheets prepared with nanoparticle-coated fibers had 30-50% higher porosity with tensile strength index retained close to the control sample. (c) 2006 Elsevier B.V. All rights reserved.
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