Molecular bonding characteristics of Self-plasticized bamboo composites
Journal Title: Pakistan Journal of Pharmaceutical Sciences - Year 2014, Vol 27, Issue 4
Abstract
Bamboo biomass fibers were gradually separated, prepared, and then self-plasticized for immune composites. The molecular bonding characteristics of the self-plasticized bamboo composites were investigated by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR), and thermo gravimetric analysis (TG). The important results were as follows. (1) During self-plasticizing of bamboo biomass, the cross-linking between celluloses mainly depended on carboxylic acid anhydrides and carboxylic acid esters, that between cellulose and lignin depended on carboxylic acid esters and C=O groups of aliphatic hydrocarbons, and that of hemi cellulose had a ether bond and ester bond bridging effect between lignin and cellulose. The cross-linking effects of hemi cellulose, lignin, and cellulose could be stacked and coupled. (2) After self-plasticization, the crystallinity of the lingo cellulosic biomass, lignin cellulose, and cellulose were increased by 5.8%, 2.28%, and 11.67%, respectively. While the TG curves of all samples were basically similar in shape, the weight loss rate turning points of the self-plasticized samples were delayed compared with those of the bamboo biomass fibers. This result demonstrated that the molecular integration of the bamboo biomass was increased after self-plasticization, and confirmed that bond cross-linking between the hemi cellulose, lignin and cellulose of the bamboo biomass had occurred.
Authors and Affiliations
Qiu Xue , Wanxi Peng , Makoto Ohkoshi
Keywords
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