Preparation and Evaluation of Epoxy Resin Prepared from the Liquefied Product of Cotton Stalk

Liquefaction of waste lignocellulosic biomass is a viable technology for replacing fossil fuels and meeting sustainable development goals. In this study, bio-based epoxy resins were prepared from polyhydric-alcohol-liquefied cotton stalk by glycidyl etherification. The cotton stalk was liquefied in...

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Bibliographic Details
Published in:Processes 2021-08, Vol.9 (8), p.1417
Main Authors: Tuohedi, Nuerjiamali, Wang, Qingyue
Format: Article
Language:English
Subjects:
Agricultural pollution
Alcohol
Biomass
Bisphenol A
Catalysis
Catalysts
Caustic soda
Cellulose
Chemicals
Composite materials
Copolymerization
Cotton
Curing agents
Epoxy resins
Fossil fuels
Glycerol
Lignocellulose
Liquefaction
Mechanical properties
Modulus of elasticity
Nonpoint source pollution
Phenols
Polyethylene glycol
Renewable resources
Solvents
Spectrum analysis
Sulfuric acid
Sustainable development
Tensile strength
Thermodynamic properties
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Summary:Liquefaction of waste lignocellulosic biomass is a viable technology for replacing fossil fuels and meeting sustainable development goals. In this study, bio-based epoxy resins were prepared from polyhydric-alcohol-liquefied cotton stalk by glycidyl etherification. The cotton stalk was liquefied in a polyethylene glycol/glycerol cosolvent under H2SO4 catalysis. Epon 828 and cotton-stalk-based epoxy resins could be cured using methylhexahydrophthalic anhydride as the curing agent, and the curing process was exothermic. The thermal properties and tensile strength of cured resins were investigated to examine the effect of adding cotton-stalk-based resin on the performance of the copolymerized epoxy resin. Further, the liquefied-cotton-stalk-based epoxy resin was blended with Epon 828 at different ratios (10, 20, and 30 mass%) and cured with a curing agent in the presence of 2-methylimidazole catalyst. An increase in the peak temperature and a reduction in the heat of curing and activation energy of the Epon 828 epoxy resin was observed with increasing content of the cotton-stalk-based epoxy resin. The tensile strength (35.4 MPa) and elastic modulus (1.5 GPa) of the highly crosslinked cotton-stalk-based epoxy resin were equivalent to those of the petroleum-based epoxy resin Epon 828.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr9081417