title: Molecular bonding characteristics of Self-plasticized bamboo composites.
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.affiliation: School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China.
authors.forename: Qiu
authors.initials: Q
authors.lastname: Xue
authors.affiliation: School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China / Lab biomaterials Science, Kyoto Prefectural University, Kyoto, Japan.
authors.forename: Wanxi
authors.initials: W
authors.lastname: Peng
authors.affiliation: Lab biomaterials Science, Kyoto Prefectural University, Kyoto, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Ohkoshi
mesh_terms: D018533:Biomass; D002482:Cellulose / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010968:Plasticizers / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry; D031787:Sasa / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D010968:Plasticizers; D011134:Polysaccharides; C036909:lignocellulose; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin