Revealing the Interface Structure and Bonding Mechanism of Coupling Agent Treated WPC

Polymers

卷:10

Mizi Fan¹  Jiuping Rao¹  Yonghui Zhou¹ 

[1] College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China;

关键词: wood plastic composites;    interfacial optimisation;    chemical reaction;    adhesion;    bonding mechanism;   

DOI  :  10.3390/polym10030266

来源: DOAJ

【 摘 要 】

This paper presents the interfacial optimisation of wood plastic composites (WPC) based on recycled wood flour and polyethylene by employing maleated and silane coupling agents. The effect of the incorporation of the coupling agents on the variation of chemical structure of the composites were investigated by Attenuated total reflectance-Fourier Transform Infrared spectroscopy (ATR-FTIR) and Solid state 13C Nuclear Magnetic Resonance spectroscopy (NMR) analyses. The results revealed the chemical reactions that occurred between the coupling agents and raw materials, which thus contributed to the enhancement of compatibility and interfacial adhesion between the constituents of WPC. NMR results also indicated that there existed the transformation of crystalline cellulose to an amorphous state during the coupling agent treatments, reflecting the inferior resonance of crystalline carbohydrates. Fluorescence Microscope (FM) and Scanning Electron Microscope (SEM) analyses showed the improvements of wood particle dispersion and wettability, compatibility of the constituents, and resin penetration, and impregnation of the composites after the coupling agent treatments. The optimised interface of the composites was attributed to interdiffusion, electrostatic adhesion, chemical reactions, and mechanical interlocking bonding mechanisms.

【 授权许可】

Unknown