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Phenolation of Bagasse Kraft Lignin for Application in Lignin-based Phenol Formaldehyde Adhesives
  
DOI:10.11980/j.issn.0254-508X.2018.09.001
Key Words:sugarcane bagasse kraft lignin  phenolation  lignin-based phenolic formaldehyde adhesive
Fund Project:中国博士后基金(2015M570419);华南理工大学制浆造纸工程国家重点实验室开放基金(201516)。
Author NameAffiliation
JIA Zhuan1,2 1. College of Light Industry and Food Engineering Guangxi University Nanning Guangxi Zhuang Autonomous Region 530004
2.Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control Nanning Guangxi Zhuang Autonomous Region 530004 
WAN Guang-cong1,2 1. College of Light Industry and Food Engineering Guangxi University Nanning Guangxi Zhuang Autonomous Region 530004
2.Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control Nanning Guangxi Zhuang Autonomous Region 530004 
ZHANG Qing-tong1,2 1. College of Light Industry and Food Engineering Guangxi University Nanning Guangxi Zhuang Autonomous Region 530004
2.Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control Nanning Guangxi Zhuang Autonomous Region 530004 
LI Ming-fu1,2 1. College of Light Industry and Food Engineering Guangxi University Nanning Guangxi Zhuang Autonomous Region 530004
2.Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control Nanning Guangxi Zhuang Autonomous Region 530004 
LUO Bin1,2 1. College of Light Industry and Food Engineering Guangxi University Nanning Guangxi Zhuang Autonomous Region 530004
2.Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control Nanning Guangxi Zhuang Autonomous Region 530004 
GUO Chen-yan1,2 1. College of Light Industry and Food Engineering Guangxi University Nanning Guangxi Zhuang Autonomous Region 530004
2.Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control Nanning Guangxi Zhuang Autonomous Region 530004 
WANG Shuang-fei1,2 1. College of Light Industry and Food Engineering Guangxi University Nanning Guangxi Zhuang Autonomous Region 530004
2.Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control Nanning Guangxi Zhuang Autonomous Region 530004 
MIN Dou-yong1,2,* 1. College of Light Industry and Food Engineering Guangxi University Nanning Guangxi Zhuang Autonomous Region 530004
2.Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control Nanning Guangxi Zhuang Autonomous Region 530004 
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Abstract:In this study, sugarcane bagasse kraft lignin(KL)was phenolated by using acid as a catalyst. The phenolation process was optimized by single-factor and orthogonal experimental design where the phenolic hydroxyl group content of lignin was used as response value. The optimal conditions were found as follows: phenol∶KL=4∶1(mass ratio), t=2.5 h, T=110℃, the catalyst dosage(concentrated sulphuric acid of 98 wt%)was 4%. The structural changes of KL induced by phenolation were further characterized by 31P Nuclear Magnetic Resonance Spectroscopy(31P NMR), and Fourier Transform infrared spectroscopy. The results indicated that the molecular weight and the polydispersity of phenolated bagasse kraft lignin(PKL)decreased. The phenolic hydroxyl group content increased. Eventually, P-KL and KL were respectively used to replace 60 wt % of phenol to produce phenolic formaldehyde(PF) adhesives as P-KLPF and KLPF. Compared to KLPF, less formaldehyde and phenol were released from P-KLPF which indicated that phenolation was an effective way to improve the reaction activity bagasse kraft lignin lignin and formaldehyde.
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