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- 저자 : Nakagaito, Antonio Norio (검색결과 2 건)
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The Processing and Mechanical Performance of Cellulose Nanofiber-based Composites
Nakagaito, Antonio Norio,Takagi, Hitoshi,Pandey, Jitendra Kumar Korean Society of Ocean Engineers 2011 International journal of ocean system engineering Vol.1 No.4
Nanocomposites based on cellulose nanofibers have been studied for a considerable time since its first introduction, however real applications seem to have hardly developed to these days. The high-strength of cellulose nanofibers suggests the potential to reinforce plastics to produce composites for semi-structural or even structural applications. This paper discusses some of the attempts to produce such high-strength nanocomposites and the main challenges that have to be overcome to bring them into commercial products.
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Kim, Y. H.,Park, S. J.,Nakagaito, A. N. Springer Verlag 2017 Metallurgical and materials transactions. B, Proce Vol.48 No.4
<P>In the present study, optimal dispersion conditions were developed to disperse nanocomposites containing halloysite nanotubes (HNTs) and unsaturated polyester (UP) resin using ultrasonic dispersion method. Due to the presence of a substantial amount of water in HNTs, their properties depend on the operating temperature when dispersing. It is, therefore, important to understand the structural changes of HNTs that occur when changing the operating temperature. HNTs heat-treated at various temperatures have different structures and mechanical/chemical properties. Therefore, in this research, HNTs were treated at two temperatures, 773.15 K and 973.15 K (500 A degrees C and 700 A degrees C), and the correlation between UP resin and heat-treated HNTs was studied in detail. The quantities of HNTs were 0.5 and 1 wt pct, for the 773.15 K and 973.15 K (500 A degrees C and 700 A degrees C) heat treatment temperatures, respectively. The contents of HNTs were restricted in order to demonstrate the aggregation phenomenon. The dispersion was carried out by ultrasonication. All structural changes including dispersion behavior were examined by TEM. The mechanical properties were assessed by impact tests. The results showed that the high impact strength of the nanocomposite containing 1 wt pct of 973.15 K (700 A degrees C) heat-treated HNT was superior. In other words, it can be said that the rheological property of the matrix resin depended on the quantities of HNTs and the heat treatment temperature. (C) The Minerals, Metals & Materials Society and ASM International 2017</P>
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