tailieunhanh - Báo cáo hóa học: " Cellulose fibres, nanofibrils and microfibrils: The morphological sequence of MFC components from a plant physiology and fibre technology point of view"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Cellulose fibres, nanofibrils and microfibrils: The morphological sequence of MFC components from a plant physiology and fibre technology point of view | Chinga-Carrasco Nanoscale Research Letters 2011 6 417 http content 6 1 417 o Nanoscale Research Letters a SpringerOpen Journal NANO REVIEW Open Access Cellulose fibres nanofibrils and microfibrils The morphological sequence of MFC components from a plant physiology and fibre technology point of view Gary Chinga-Carrasco Abstract During the last decade major efforts have been made to develop adequate and commercially viable processes for disintegrating cellulose fibres into their structural components. Homogenisation of cellulose fibres has been one of the principal applied procedures. Homogenisation has produced materials which may be inhomogeneous containing fibres fibres fragments fibrillar fines and nanofibrils. The material has been denominated microfibrillated cellulose MFC . In addition terms relating to the nano-scale have been given to the MFC material. Several modern and high-tech nano-applications have been envisaged for MFC. However is MFC a nano-structure It is concluded that MFC materials may be composed of 1 nanofibrils 2 fibrillar fines 3 fibre fragments and 4 fibres. This implies that MFC is not necessarily synonymous with nanofibrils microfibrils or any other cellulose nano-structure. However properly produced MFC materials contain nano-structures as a main component . nanofibrils. Review Introduction Wood pulp fibres are presently a major area of research for several end-use applications. Fibres can be utilised as reinforcement in bio-degradable composites and as a source of raw materials for bio-energy and biochemical production. Wood pulp fibres have been applied as the raw material for the production of a fibrillated material which was introduced and defined as microfibrillated cellulose MFC by Turbak et al. 1 and Herrick et al. 2 . Several modern and high-tech nano-applications have been envisaged for MFC 1 . Although cellulose fibres have constituted the main source for MFC production the utilisation of other pulp