Effects of nano-TiO2 on bonding performance, structure stability and film-forming properties of starch-g-VAc based wood adhesive

Lei Chen; Zhouyi Xiong; Hanguo Xiong; Zhenjiong Wang; Zia-Ud Din; Asad Nawaz; Pengkai Wang; Chun Hu

doi:10.1016/j.carbpol.2018.08.023

Effects of nano-TiO₂ on bonding performance, structure stability and film-forming properties of starch-g-VAc based wood adhesive

Carbohydr Polym. 2018 Nov 15:200:477-486. doi: 10.1016/j.carbpol.2018.08.023. Epub 2018 Aug 9.

Authors

Lei Chen¹, Zhouyi Xiong², Hanguo Xiong³, Zhenjiong Wang⁴, Zia-Ud Din¹, Asad Nawaz¹, Pengkai Wang¹, Chun Hu¹

Affiliations

¹ College of Food Science and Technology, Huazhong Agriculture University, Wuhan 430070, PR China.
² Fisheries Research Institute, Wuhan Academy of Agricultural Sciences, Wuhan 430207, PR China. Electronic address: xzy646590@163.com.
³ College of Food Science and Technology, Huazhong Agriculture University, Wuhan 430070, PR China. Electronic address: xionghanguo@163.com.
⁴ School of Food Science, Nanjing Xiaozhuang University, 3601 Hongjing Road, Nanjing 211171, PR China; Jiangsu Provincial Key Construction Laboratory of Special Biomass Waste Resource Utilization, Nanjing 211171, PR China.

PMID: 30177189
DOI: 10.1016/j.carbpol.2018.08.023

Abstract

The nano-TiO₂ was utilized to improve the bonding performance, structure stability and film-forming properties of renewable starch-based wood adhesive. The results showed that 4% nano-TiO₂ (nano-TiO₂:starch, w;w) resulted in 6.5 MPa of shear strength and 6437 Pa.s of viscosity. The thermal stability was measured by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Additionally, low-field nuclear magnetic resonance (NMR) and rheological results exhibited the enhancement of nano-TiO₂ on the pseudoplasticity and structure which determined the state and migration of water. Besides, the structural characterization of copolymer was analyzed via fourier transform infrared spectroscopy (FTIR) and X-ray diffraction analysis (XRD). Furthermore, the film-forming property was evaluated by small angle X-ray scattering (SAXS) and dynamic mechanical analysis (DMA). The morphological structures of adhesive were observed by scanning electron microscopy (SEM). In conclusion, the 4% nano-TiO₂ (nano-TiO₂:starch, w;w) can be employed to prepare starch-based wood adhesives with superior properties for wood application.

Keywords: Film-forming; Nano-TiO(2); Rheological properties; Small angle X-ray scattering; Starch; Wood adhesive.