Abstract:

Lithium chloride/N,N-dimethylacetamide（LiCl/DMAc）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 LiCl/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 ℃ for 1 h，being dried and then 400mg of the dried bagasse was added into 20 mL of 10% LiCl/DMAc solution，and finally the solution was heated at 160 ℃ for 3 h. This study provides a promising prospect for efficient bagasse derivation at homogeneous state.

摘要：

LiCl/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、LiCl浓度、加热时间及加热温度5个方面对LiCl/DMAc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1 h，烘干后取400 mg与10%LiCl/DMAc溶液20 mL按固液比1∶50 g/mL混合，160 ℃加热3 h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。