Acetylation of sugarcane bagasse using NBS as a catalyst under mild reaction conditions for the production of oil sorption-active materials.
Sugarcane bagasse was esterified with acetic anhydride using N-bromosuccinimide as a catalyst under mild conditions in a solvent free system. The extent of acetylation was measured by weight percent gain, which varied from 2.1% to 24.7% by changing the reaction temperature (25-130 degrees C) and duration (0.5-6.0 h). N-Bromosuccinimide was found to be a novel and highly effective catalyst for acetylation of hydroxyl groups in bagasse. At a concentration of 1% of the catalyst in acetic anhydride, a weight percent gain of 24.7% was achieved at 120 degrees C for 1 h, compared with 5.1% for the un-catalyst reaction under the same reaction condition. FT-IR and CP-MAS 13C-NMR studies produced evidence for acetylation. The thermal stability of the products decreased slightly upon chemical modification, but no significant decrease in thermal stability was observed for WPG > or = 24.7%. More importantly, the acetylation significantly increased hydrophobic properties of the bagasse. The oil sorption capacity of the acetylated bagasse obtained at 80 degrees C for 6 h, was 1.9 times higher than the commercial synthetic oil sorbents such as polypropylene fibres. Therefore, these oil sorption-active materials can be used to substitute non-biodegradable materials in oil spill cleanup.
College of Forestry, The North-Western Sciences and Technology University of Agricultural and Forestry, Yangling 712100, China.
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D000062:Accidents, Occupational; D000327:Adsorption; D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources; D018533:Biomass; D001974:Bromosuccinimide / Q000737:chemistry*; D002384:Catalysis; D006838:Hydrocarbons / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D012037:Refuse Disposal; D031786:Saccharum / Q000378:metabolism*; D013696:Temperature
D006838:Hydrocarbons; D001974:Bromosuccinimide