ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
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
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.
Chemical Papers 72 (3) 763–767 (2018)