title: Research on the formation mechanism of composites from lignocelluloses and CaCO₃.
abstract: The purpose of this work is to explore the formation mechanism of lignocellulose composites in ionic liquids, which is very important for the potential applications of lignocellulose composites. In this study, the lignocellulose/CaCO3 composites have been synthesized using different concentrations of CaCO3 by a rapid and green microwave-ionic liquid method. In view of the experimental results and literature, the formation mechanism of the composites from lignocelluloses and CaCO3 was proposed. It is suggested that lignocelluloses accumulated Ca(2+) ions due to the complexation of the Ca(2+) ions and the highly anionic polysaccharide groups of lignocelluloses, and CaCO3 was obtained by the strong electrostatic interactions between carbonate anions and calcium cations. When the content of CaCO3 reached a certain level, the activity of CaCO3 in the composites was mainly as aggregation. Using lignocelluloses instead of cellulose as a template to synthesize the organic-inorganic composites was a facile method, which does not need to separate the lignocelluloses and can utilize all the main components of lignocelluloses.
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, PR China.
authors.forename: Lian-Hua
authors.initials: LH
authors.lastname: Fu
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, PR China. Electronic address: mg_ma@bjfu.edu.cn.
authors.forename: Ming-Guo
authors.initials: MG
authors.lastname: Ma
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Bian
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, PR China.
authors.forename: Fu
authors.initials: F
authors.lastname: Deng
authors.affiliation: National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China.
authors.forename: Xuan
authors.initials: X
authors.lastname: Du
mesh_terms: D000838:Anions / Q000737:chemistry; D002119:Calcium Carbonate / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry; D008031:Lignin / Q000737:chemistry*; D008872:Microwaves; D032107:Populus / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014961:X-Ray Diffraction
chemical_list: D000838:Anions; D052578:Ionic Liquids; C036909:lignocellulose; D008031:Lignin; D002119:Calcium Carbonate
keywords: CaCO(3); Composites; Ionic liquid; Lignocelluloses; Mechanism; Microwave