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Efficient extraction of bagasse hemicelluloses and characterization of solid remainder.

Bioresource technology (2015-03-10)
Shuangquan Yao, Shuangxi Nie, Yue Yuan, Shuangfei Wang, Chengrong Qin
ABSTRACT

To reduce the degradation of cellulose and obtain high molecular weight of hemicellulose from the extracts, pH pre-corrected hot water pretreatment was developed by employing sodium hydroxide (3.9mol/L). The response surface model was established to optimize the extraction process. The species composition and purity of hemicellulose extract was analyzed by High Performance Liquid Chromatography (HPLC). The obtained solid remainder was analyzed by FTIR and SEM. The results showed that the component of xylose in hemicellulose extract was similar with commercial xylan. FTIR and SEM were shown to be able to evaluate solid remainder composition and surface characterization of the bagasse. The biggest balance between solid remainder and dissolved solid was obtained. Not only the yield of dissolved solid was improved, but the structure of solid remainder was also proved, which was beneficial to pulping and papermaking.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
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D-(+)-Xylose, BioUltra, ≥99.0% (sum of enantiomers, HPLC)
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D-(+)-Xylose, ≥99%
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Potassium bromide, anhydrous, powder, 99.999% trace metals basis
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Potassium bromide, anhydrous, powder, 99.95% trace metals basis
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D-(+)-Galactose, meets analytical specification of Ph. Eur., BP
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D-(−)-Arabinose, suitable for microbiology, ≥99.0%
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D-(+)-Mannose, BioUltra, ≥99.5% (sum of enantiomers, HPLC)
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D-(+)-Mannose, suitable for microbiology, ≥99%
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Potassium bromide, BioUltra, ≥99.5% (AT)
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D-(+)-Galactose, suitable for microbiology, ≥99.0%
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D-(+)-Mannose, ≥99.0% (sum of enantiomers, HPLC), suitable for microbiology
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D-(+)-Galactose, ≥98%
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D-(+)-Galactose, powder, anhydrous, BioReagent, suitable for cell culture, suitable for insect cell culture
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D-(+)-Galactose, ≥99%
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Potassium bromide, ReagentPlus®, ≥99.0%
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Potassium bromide, anhydrous, free-flowing, Redi-Dri, ACS reagent, ≥99%
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Potassium bromide, FT-IR grade, ≥99% trace metals basis
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Galactose, Pharmaceutical Secondary Standard; Certified Reference Material
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D-(+)-Mannose, synthetic, ≥99%