Efficient extraction of bagasse hemicelluloses and characterization of solid remainder.
Efficient extraction of bagasse hemicelluloses and characterization of solid remainder.
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DOI：
10.1016/j.biortech.2015.02.052
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发表时间：
2015-06
影响因子：
11.4
通讯作者：
Shuangquan Yao;Shuangxi Nie;Yue Yuan;Shuangfei Wang;Chengrong Qin
中科院分区：
文献类型：
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作者：
Shuangquan Yao;Shuangxi Nie;Yue Yuan;Shuangfei Wang;Chengrong Qin
为了减少纤维素的降解，并从萃取物中获得高相对分子质量的半纤维素，采用3.9mol/L的氢氧化钠进行了pH预校正的热水预处理。建立了响应面模型，优化了提取工艺。采用高效液相色谱(HPLC)分析半纤维素提取物的种类组成和纯度。用红外光谱和扫描电子显微镜对所得固体残留物进行了分析。结果表明，半纤维素提取液中木糖的组成与商品木聚糖相似。傅立叶变换红外光谱和扫描电子显微镜能够评价蔗渣的固体残留物组成和表面特征。固体残留物和溶解固体之间的平衡最大。不仅提高了溶解固形物的产率，而且证明了固体残留物的结构，有利于制浆造纸。
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 (3.9 mol/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.