ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Mechanical property of lignin-modified phenolic foam enhanced by nano-SiO₂ via a novel method

Yajun Guo, Lihong Hu, Caiying Bo, Qianqian Shang, Guodong Feng, Puyou Jia, Baofang Zhang, and Yonghong Zhou

Institute of Chemical Industry of Forest Products, CAF, Nanjing, China

E-mail: zhlh990907@sina.com

Abstract: Recently, the application of nano-SiO₂ in composite materials has received wide attention. In this work, a new method was explored to prepare nano-SiO₂ using phenol instead of other organic alcohols. The obtained nano-SiO₂ was characterized by Fourier transform infrared spectroscopy (FT-IR) and by the zeta potential method. The phenol dispersant containing the prepared nano-SiO₂ exhibited much higher reactivity toward formaldehyde than pure phenol. The preparation parameters of phenolic resin (PR) involved by nano-SiO₂ were mild. This novel phenolic resin was successfully applied to fabricate a phenolic foam (PF) with a 153% increase in compressive strength.

Keywords: Nano-SiO₂ ; Lignin ; Free formaldehyde ; Phenolic foam 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-017-0317-2

Chemical Papers 72 (3) 763–767 (2018)