Pristine lignin as a flame retardant in flexible PU foam

被引:78
作者
Zhang, Dongqiao [1 ,2 ]
Zeng, Jia [1 ]
Liu, Weifeng [1 ]
Qiu, Xueqing [3 ]
Qian, Yong [1 ]
Zhang, He [2 ,4 ]
Yang, Yi [1 ]
Liu, Meng [1 ]
Yang, Dongjie [1 ]
机构
[1] South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R China
[2] South China Univ Technol, Key Lab Polymer Proc Engn SCUT, Minist Educ, Guangzhou 510641, Peoples R China
[3] Guangdong Univ Technol, Sch Chem & Chem Engn, Guangzhou 510006, Peoples R China
[4] South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Peoples R China
基金
中国国家自然科学基金;
关键词
THERMAL-PROPERTIES; EFFICIENT ROUTE; PHOSPHORUS; FLAMMABILITY; ENHANCEMENT; COATINGS;
D O I
10.1039/d1gc01109j
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Typically, pristine lignin is considered to have limited application in the flame retardance area, and the phosphorylation of lignin or its combination with other effective flame retardants is required to help polyurethane achieve flame retardance. Herein, three types of lignin, including sodium lignosulfonate (LS), alkaline lignin (AL) and enzymatic hydrolysis lignin (EHL), were solely applied to significantly enhance the flame retardance and thermostability of PU foams. The PU foam coated with AL or LS could show evidently enhanced flame retardance by growing dense and swelling char, radical capture and inert gas dilution to protect the PU foam from fire and heat, and the limited oxygen index could reach as high as 28.4%. The thermostability of the coated PU foam was significantly improved by retaining 44% of its weight at 900 degrees C. The flame retardance mechanism of lignin/PU foam was attributed to the fact that lignin could change the thermal degradation and burning behavior of PU foams in the condensed phase (char forming) and the gas phase (inert gas dilution), and by radical quenching (phenolic groups) and S-N synergism. Our research has proved that lignin alone could help PU foam and cotton fabric achieve complete flame retardance, without any phosphorylated modification or the combination with other flame retardant agents.
引用
收藏
页码:5972 / 5980
页数:9
相关论文
共 39 条
[21]   Conductivity Enhancement of Poly(3,4-ethylenedioxythiophene)/Lignosulfonate Acid Complexes via Pickering Emulsion Polymerization [J].
Qian, Yong ;
Wang, Ting ;
Qiu, Xueqing ;
Zhao, Dacheng ;
Liu, Di ;
Deng, Yonghong .
ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2016, 4 (12) :7193-7199
[22]   Lignin: a nature-inspired sun blocker for broad-spectrum sunscreens [J].
Qian, Yong ;
Qiu, Xueqing ;
Zhu, Shiping .
GREEN CHEMISTRY, 2015, 17 (01) :320-324
[23]   Hydroxypropyl Sulfonated Lignin as Dye Dispersant: Effect of Average Molecular Weight [J].
Qin, Yanlin ;
Yang, Dongjie ;
Qiu, Xueqing .
ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2015, 3 (12) :3239-3244
[24]   Investigation of grafted sulfonated alkali lignin polymer as dispersant in coal-water slurry [J].
Qin, Yanlin ;
Yang, Dongjie ;
Guo, Wenyuan ;
Qiu, Xueqing .
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2015, 27 :192-200
[25]   Effect of surface functionalization of MCM-41-type mesoporous silica nanoparticleson the endocytosis by human cancer cells [J].
Slowing, Igor ;
Trewyn, Brian G. ;
Lin, Victor S. -Y. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (46) :14792-14793
[26]   Thermal degradation and flame retardancy properties of ABS/lignin: Effects of lignin content and reactive compatibilization [J].
Song, Pingan ;
Cao, Zhenhu ;
Fu, Shenyuan ;
Fang, Zhengping ;
Wu, Qian ;
Ye, Jiewang .
THERMOCHIMICA ACTA, 2011, 518 (1-2) :59-65
[27]   Strategies for the Conversion of Lignin to High-Value Polymeric Materials: Review and Perspective [J].
Upton, Brianna M. ;
Kasko, Andrea M. .
CHEMICAL REVIEWS, 2016, 116 (04) :2275-2306
[28]   A novel phosphorus-containing lignin-based flame retardant and its application in polyurethane [J].
Wang, Yuliang ;
Zhang, Yumei ;
Liu, Biying ;
Zhao, Qi ;
Qi, Yunxia ;
Wang, Yanmiao ;
Sun, Zhaoyan ;
Liu, Baijun ;
Zhang, Niaona ;
Hu, Wei ;
Xie, Haiming .
COMPOSITES COMMUNICATIONS, 2020, 21
[29]   Synergetic enhancement on flame retardancy by melamine phosphate modified lignin in rice husk ash filled P34HB biocomposites [J].
Wu, Wei ;
He, Haibing ;
Liu, Tao ;
Wei, Ruichao ;
Cao, Xianwu ;
Sun, Qijun ;
Venkatesh, Shishir ;
Yuen, Richard K. K. ;
Roy, Vellaisamy A. L. ;
Li, Robert K. Y. .
COMPOSITES SCIENCE AND TECHNOLOGY, 2018, 168 :246-254
[30]   Study on the Antioxidant Activity of Lignin and Its Application Performance in SBS Elastomer [J].
Xiao, Liangfeng ;
Liu, Weifeng ;
Huang, Jinhao ;
Lou, Hongming ;
Qiu, Xueqing .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2021, 60 (01) :790-797