文献类型：期刊文献

英文题名：Surface properties of in situ organo-montmorillonite modified wood flour and the influence on mechanical properties of composites with polypropylene

作者：Liu, Ru[1] Sun, Wenjing[2] Cao, Jinzhen[2] Wang, Jiamin[2]

第一作者：刘如

通信作者：Liu, R[1]|[a0005be6e90476f57c0e3]刘如;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China

年份：2016

卷号：361

起止页码：234-241

外文期刊名：APPLIED SURFACE SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000366805300032)】；

基金：This study was financially supported by the National Natural Science Foundation of China (No. 31170524) and the Fundamental Research Funds for the Central Universities (TD2011-14) in China.

语种：英文

外文关键词：Wood-plastic composites; Montmorillonite; Surface properties; Mechanical properties

摘要：In this study, wood flours (WFs) were modified by sodium-montmorillonite (Na-MMT) and didecyl dimethyl ammonium chloride (DDAC) in two steps to form organo-montmorillonite (OMMT) inside WFs at different OMMT concentrations (0.25, 0.5, 0.75 and 1%, respectively). The surface properties of WFs were investigated as an approach to understand the compatibility of WF/polypropylene (PP) composites. The mechanical properties of the composites were also tested. The results showed that: (1) OMMT modification did not influence the surface morphologies of WFs; (2) owing to the covering of OMMT on WF surface, with increasing OMMT concentration, the surface free energies of WFs increased with both increases of dispersive and polar components, and the surface hydroxyl groups of WF decreased, suggesting good compatibility with non-polar PP; (3) the flexural and tensile strength were correlated with the dispersive component fraction. Significant improvements in flexural and tensile strength were found at OMMT concentration of 0.5%. With increase of OMMT concentration, the flexural and Young's modulus increased. However, the impact strength decreased. (C) 2015 Elsevier B.V. All rights reserved.