DMAc体系对蔗渣的溶解性.pdf

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CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2010年第29卷第9期
研究开发
LICIDMAC体系对蔗渣的溶解性
李状小2,石锦志山2,廖兵1,庞浩1
(中国科学院广州化学研究所,中国科学院纤维素化学重点实验室,广东广州510650
2中因科学院研究生院,北京100049)
摘要:LiCM/DMAc体系是近年来日益受到重视的纤维素非水溶剂,但其溶解植物生物质,如蔗渣的情况却鲜有
报道。本文从活化时间、固液比、LiCI浓度、加热时间及加热温度5个方面对 LICIDMAC体系溶解蔗渣的行为
进行研究。结果表明最佳溶解条件为:蔗渣160℃活化1h,烘干后取400mg与10% LICIDMAC溶液20mL按
液比1:50g/mL混合,160℃加热3h后,蔗渣溶解率可达81.8%。这为均相条件下利用蔗渣进行高效衍生
化提供了有前景的发展方向
关鍵讽:蔗渣;氟化锂/NN-二甲基乙酰胺;溶解;植物生物质
中图分类号:TQ352文献标志码
文章编号:1000-6613(2010)09-1634-06
Dissolution of bagasse in LICI/DMAC system
LI Zhuang-2, SHI Jingzhi. 2, LIAO Bing, PANG Hao
(Key Laboratory of Cellulose and Lignocellulosics Cemst Guan zhou Institute of Chemistry, Chinese Academy of
Sciences, Guangzhou 510650, Guangdong, China; 2 Graduate University of the Chinese
Academy of Sciences, Beijing 100049, China)
Abstract: Lithium chloride/N, -dimethylacetamide(LICIDMAC )as non-water solvent system of
cellulose has become very popular in recent years. However, few reports were found studying on the
dissolution of plant biomass using this solvent system, such as bagasse. In this paper, the dissolution
condition of bagasse in LICI/DMAC system was investigated from five aspects, such as activation
time, bath ratio, Licl concentration, heating time and heating temperature. An 81. 8%final solubility
could be achieved under the optimum dissolution conditions when the bagasse was activated at 160 C
for 1 h, being dried and then 400mg of the dried bagasse was added into 20 ML of 10% LICI/DMAC
solution, and finally the solution was heated at 160 C for 3 h. This study provides a promising
prospect for efficient bagasse derivation at homogeneous state
Key words: bagasse; lithium chloride/N, -dimethy acetamide; dissolution; plant biomass
当今世界化石能源日益短缺,生物质最有可能作为生物质材料的原料之一,具有突出的优势。蔗
替代其成为能源与合成材料的来源。相比于化石能渣产量大且易于收集,其收集成本由制糖成本分担
源的广泛应用,生物质作为化工原料和材料的应用
研究相对滞后。这一方面是由于基于生物质的大宗基金项目:NSCr东联合基金(U03405),、国家83计划
工业品生产体系远未建立,另一方面则是由于木质(200A1004)及广东省自然基金团队(E2002)资助项日。
素、半纤维素和纤维素缠绕的细胞壁结构难以破坏,第
一作者简介:李状(1985-),男,硕士研究生,E-mail
同时运输半径瓶颈、成分的不稳定性、改性困难等
e-03030611/@163.c0m。联系人:庞浩,研究员,博士生导师,主要
从事天然高分子材料和植物牛物质材料化研究。电话020-85231236
特性也决定了生物质的材料化利用相对困难。蔗渣 E-mail panghao gic ac cn