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Cellulose fibres, nanofibrils and microfibrils: The morphological sequence of MFC components from a plant physiology and fibre technology point of view.

Chinga-Carrasco G - Nanoscale Res Lett (2011)

Bottom Line: 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, i.e. nanofibrils.

View Article: PubMed Central - HTML - PubMed

Affiliation: Paper and Fibre Research Institute (PFI AS), Høgskolerringen 6b, 7491 Trondheim, Norway. gary.chinga.carrasco@pfi.no.

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, i.e. nanofibrils.

No MeSH data available.


Related in: MedlinePlus

Structure of wood pulp fibres. (a) Note the network of microfibrils covering the outer wall layer. (b) Microtomed cross section showing the S1, S2 and S3 layers. (c) Cross-sectional fracture area, showing the microfibrils in the S2 layer. Reproduced and modified from Chinga-Carrasco [11].
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Figure 1: Structure of wood pulp fibres. (a) Note the network of microfibrils covering the outer wall layer. (b) Microtomed cross section showing the S1, S2 and S3 layers. (c) Cross-sectional fracture area, showing the microfibrils in the S2 layer. Reproduced and modified from Chinga-Carrasco [11].

Mentions: The wood pulp fibres have multiscale characteristics [11]. Roughly, typical lengths of fibres are 1 to 3 mm and typical widths are 10 to 50 μm. The fibre wall thickness is roughly between 1 and 5 μm (Figure 1). The fibre wall is composed of defined layers (Figure 1b), including the primary wall (P) and several secondary wall layers (S1, S2 and S3). Each of these layers is characterised by a specific arrangement of fibrils as has been detailed described for more than 40 years ago [12].


Cellulose fibres, nanofibrils and microfibrils: The morphological sequence of MFC components from a plant physiology and fibre technology point of view.

Chinga-Carrasco G - Nanoscale Res Lett (2011)

Structure of wood pulp fibres. (a) Note the network of microfibrils covering the outer wall layer. (b) Microtomed cross section showing the S1, S2 and S3 layers. (c) Cross-sectional fracture area, showing the microfibrils in the S2 layer. Reproduced and modified from Chinga-Carrasco [11].
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211513&req=5

Figure 1: Structure of wood pulp fibres. (a) Note the network of microfibrils covering the outer wall layer. (b) Microtomed cross section showing the S1, S2 and S3 layers. (c) Cross-sectional fracture area, showing the microfibrils in the S2 layer. Reproduced and modified from Chinga-Carrasco [11].
Mentions: The wood pulp fibres have multiscale characteristics [11]. Roughly, typical lengths of fibres are 1 to 3 mm and typical widths are 10 to 50 μm. The fibre wall thickness is roughly between 1 and 5 μm (Figure 1). The fibre wall is composed of defined layers (Figure 1b), including the primary wall (P) and several secondary wall layers (S1, S2 and S3). Each of these layers is characterised by a specific arrangement of fibrils as has been detailed described for more than 40 years ago [12].

Bottom Line: 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, i.e. nanofibrils.

View Article: PubMed Central - HTML - PubMed

Affiliation: Paper and Fibre Research Institute (PFI AS), Høgskolerringen 6b, 7491 Trondheim, Norway. gary.chinga.carrasco@pfi.no.

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, i.e. nanofibrils.

No MeSH data available.


Related in: MedlinePlus