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首页> 外文会议>ISWFPC;International symposium on wood, fiber and pulping chemistry >ACTIVATION OF CELLULOSE FIBER IN IONIC LIQUID MEDIA FOR HETEROGENEOUS CHEMICAL MODIFICATION
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ACTIVATION OF CELLULOSE FIBER IN IONIC LIQUID MEDIA FOR HETEROGENEOUS CHEMICAL MODIFICATION

机译：离子液体介质中纤维素纤维的非均相化学改性

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Naturally occuring and renewable biopolymers have attracted great interest as raw materials for the production of advanced materials, to phase out existing petrochemical-based polymers. Cellulose is a feasible feedstock for cheap, renewable and potentially biodegradable products for mass production. Chemical modifications of the hydroxyl groups of cellulose by etherification, esterification, carbamoylation or redox chemistry provide access to a wide variety of materials with variable properties. Potential large-scale uses of these materials range from films to bulk composites. Recently, Ionic liquids (IL's) have opened new possibilities for homogenous modification of cellulose.[1-2] However, we would also like to consider whether IL's could be used to activate cellulosic fiber surfaces for efficient heterogenous modification. In this connection we examined the use of l-ethyl-3-methylimidazolium chloride ([emim]Cl) to promote the heterogeneous modification of cellulose with succinic anhydride (SA). Here, our strategy was to use high concentrations of cellulose to allow for partial swelling of the cellulose fibers, but to avoid complete dissolution. The analysis of the insoluble materials was achieved using microscopy, a laser-light scattering technique (particle size determination), FTIR-ATR and NMR spectroscopy. This allowed not only for thorough characterization of the resulting materials but has also direct assessment of the efficiency of IL's for the purposes of fibre activation, in the production of sustainable cellulose-based materials.
机译：天然存在的和可再生的生物聚合物作为生产先进材料的原料已引起人们极大的兴趣，以逐步淘汰现有的基于石油化学的聚合物。纤维素是廉价，可再生和潜在可生物降解产品用于大规模生产的可行原料。通过醚化，酯化，氨基甲酰化或氧化还原化学方法对纤维素的羟基进行化学修饰，可提供各种性质各异的材料。这些材料的潜在大规模使用范围从薄膜到块状复合材料。近来，离子液体（IL's）为纤维素的均质改性开辟了新的可能性。[1-2]但是，我们还想考虑IL's是否可用于活化纤维素纤维表面以进行有效的异质改性。在这方面，我们研究了使用1-乙基-3-甲基咪唑鎓氯化物（[emim] Cl）来促进琥珀酸酐（SA）对纤维素的异质改性。在这里，我们的策略是使用高浓度的纤维素，以使纤维素纤维部分溶胀，但要避免完全溶解。使用显微镜，激光散射技术（粒度测定），FTIR-ATR和NMR光谱对不溶物进行分析。这不仅可以对所得材料进行全面的表征，而且可以直接评估可持续纤维素基材料生产中IL出于纤维活化目的的效率。

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