Use of Modified Lignocellulosic Butanol Residue in Phenol-Resorcinol-Formaldehyde Polymers

作者：Liu, Juan; Zhang, Zuxin; Chen, Riqing; Xu, Yuzhi; Wang, Chupeng; Chu, Fuxiang^*

来源：BioResources, 2017, 12(1): 1015-1030.

DOI：10.15376/biores.12.1.1015-1030

• Lignin phenolation
• Lignin-based phenol-resorcinol-formaldehyde resins
• Foams
• Mechanical Properties
• Thermal stability

Lignocellulosic butanol residue ( BR), obtained as the by-product of lignocellulosic butanol production, was used for the preparation of lignin-based phenol-resorcinol-formaldehyde resins ( LPRFRs) by condensation polymerization. The lignin was first phenolated under sodium hydroxide catalysis at 90 to 92 degrees C at various phenolation times ( 1.0 to 4.0 h). The structural differences between BR and phenolated BR ( PBR) were studied using Fourier transform infrared ( FT-IR) spectroscopy, ultraviolet ( UV) spectroscopy, thermogravimetric analysis ( TGA), and gel permeation chromatography ( GPC). The BR phenolated for 3.0 h had high phenol hydroxyl content, low molecular weight, and good thermal stability. The LPRFRs with 30 wt.% BR had the lowest free formaldehyde and phenol. With the substitution of BR for phenol, the hydrophilicity of LPRFRs increased. In addition, the mechanical, fragility, thermal properties, and morphology of lignin-phenol-resorcinol-formaldehyde foams ( LPRFFs) were also investigated. The LPRFFs had excellent comprehensive properties when 30 wt.% PBR was substituted for phenol. These experimental findings could provide a new avenue for further study and application of bio-phenol-resorcinol foams.

• 出版日期2017
• 单位中国林业科学研究院