ACTIVATION OF CELLULOSE FIBER IN IONIC LIQUID MEDIA FOR HETEROGENEOUS CHEMICAL MODIFICATION

摘要：

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 (ILs) have opened new possibilities for homogenous modification of cellulose.1-2 However, we would also like to consider whether ILs 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 (emimCl) 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 ILs for the purposes of fibre activation, in the production of sustainable cellulose-based materials.

关键词： cellulose fiber ionic liquid heterogeneous

作者: Lasse E. P. Kyll(o)nen Antti S. Lahdenper(a) Tuomas P. S. Kulomaa Alistair W. T. King Ilkka Kilpel(a)inen

作者单位: Laboratory of Organic Chemistry, Department of Chemistry, University of Helsinki, A. I. Virtasen aukio 1, 00014 Helsinki, Finland

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 422-426

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）