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Liu, Yucheng; Xie, Jun; Wu, Na; Ma, Yunhai; Menon, Carlo; Tong, Jin
Cellulose (London), 30/5, Volume: 26, Issue: 8Journal Article
Crop stalk is a valuable source of cellulosic biomass and has attracted increasing attention as one kind of renewable resource. Cellulose fibers have potential as a reinforcement material to replace synthetic fibers used in biopolymer composites. This study addresses the modification and characterization of corn stem fibers extracted from corn stalk waste. The corn stem fibers were treated with alkali, silane and NaOH-silane solutions, and then, the chemical properties, surface morphology, mechanical behaviors and thermal stability of the corn stem fibers were characterized. The surface treatments improved the chemical and mechanical properties of the corn stem fibers. The fibers had rougher surfaces after the surface treatments. EDX and FTIR analysis confirmed that the surface treatments removed a certain amount of hemicelluloses, lignin and pectin from the natural fiber surface. XRD analysis results showed that the surface treatments had a positive impact on the crystallinity index of the natural fibers. The mechanical properties and thermal stability of the treated corn stem fibers were also found to be improved.
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