New approach to classification of cellulose fibrils and suitable methods for their characterization

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Abstract

Nowadays the manufacturing of cellulose micro- and nanofibrils has been significantly developed and products with tailored properties can now be introduced. Different fibrillation methods and chemical treatments generate cellulose fibrils with varied dimensions, branching degree and chemical properties. It would be beneficial to classify the different kind of cellulose fibrils according to their properties with consensual agreement. We present here a classification based on the morphological and chemical properties of cellulose fibrils. We discuss the applicability of classification and different characterization methods for certain grades (from nanowhiskers and nanofibres to nano fibrillated materials with branched or ribbon-like structures) and for different applications. Characterization of cellulose fibrils is challenging not only because of the wide size distribution and high aspect ratio but also due to the wide variety of morphological properties and the complex structure of single fibrils. This paper introduces a set of simple methods which gives the basic characteristics of nanocelluloses. Five commercially available cellulose nano/microfibrils and three self-made samples produced by and birch pulp ground to various levels using supermasscolloider equipment were analysed in detail. Different rheo- and viscometers were tested and a viscosity measurement sensitive towards high aspect ratio fibrils is introduced. The transmittance measurement gives an estimation of the amount of large particles and the optical microscopy effectively detects the amount of unfibrillated material. SEM measurements can be used to analyze the fine structure nanofibers. The aspect ratio, degree of fibrillation, fibril size and the amount of unfibrillated material can be evaluated with a combination of these indirect measurements, which provide a basic set for quality assurance.
Original languageEnglish
Title of host publicationNovel nanostructured polymeric materials for food packaging and beyond
Subtitle of host publicationInternational Workshop: Book of Abstracts
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages15-15
Number of pages1
ISBN (Electronic)978-951-38-7605-0
ISBN (Print)978-951-38-7604-3
Publication statusPublished - 2011
EventNovel nanostructured polymeric materials for foodpackaging and beyond: International Workshop - Espoo, Finland
Duration: 15 Sep 201116 Sep 2011

Publication series

SeriesVTT Symposium
Number270
ISSN0357-9387

Workshop

WorkshopNovel nanostructured polymeric materials for foodpackaging and beyond
CountryFinland
CityEspoo
Period15/09/1116/09/11

Fingerprint

cellulose
nanofibers
physicochemical properties
methodology
viscometers
transmittance
chemical treatment
Betula
quality control
pulp
branching
microscopy
manufacturing
viscosity
sampling

Cite this

Sneck, A., Pitkänen, M., Kangas, H., Tammelin, T., & Hellen, E. (2011). New approach to classification of cellulose fibrils and suitable methods for their characterization. In Novel nanostructured polymeric materials for food packaging and beyond: International Workshop: Book of Abstracts (pp. 15-15). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 270
Sneck, Asko ; Pitkänen, Marja ; Kangas, Heli ; Tammelin, Tekla ; Hellen, Erkki. / New approach to classification of cellulose fibrils and suitable methods for their characterization. Novel nanostructured polymeric materials for food packaging and beyond: International Workshop: Book of Abstracts. Espoo : VTT Technical Research Centre of Finland, 2011. pp. 15-15 (VTT Symposium; No. 270).
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Sneck, A, Pitkänen, M, Kangas, H, Tammelin, T & Hellen, E 2011, New approach to classification of cellulose fibrils and suitable methods for their characterization. in Novel nanostructured polymeric materials for food packaging and beyond: International Workshop: Book of Abstracts. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 270, pp. 15-15, Novel nanostructured polymeric materials for foodpackaging and beyond, Espoo, Finland, 15/09/11.

New approach to classification of cellulose fibrils and suitable methods for their characterization. / Sneck, Asko; Pitkänen, Marja; Kangas, Heli; Tammelin, Tekla; Hellen, Erkki.

Novel nanostructured polymeric materials for food packaging and beyond: International Workshop: Book of Abstracts. Espoo : VTT Technical Research Centre of Finland, 2011. p. 15-15 (VTT Symposium; No. 270).

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

TY - CHAP

T1 - New approach to classification of cellulose fibrils and suitable methods for their characterization

AU - Sneck, Asko

AU - Pitkänen, Marja

AU - Kangas, Heli

AU - Tammelin, Tekla

AU - Hellen, Erkki

PY - 2011

Y1 - 2011

N2 - Nowadays the manufacturing of cellulose micro- and nanofibrils has been significantly developed and products with tailored properties can now be introduced. Different fibrillation methods and chemical treatments generate cellulose fibrils with varied dimensions, branching degree and chemical properties. It would be beneficial to classify the different kind of cellulose fibrils according to their properties with consensual agreement. We present here a classification based on the morphological and chemical properties of cellulose fibrils. We discuss the applicability of classification and different characterization methods for certain grades (from nanowhiskers and nanofibres to nano fibrillated materials with branched or ribbon-like structures) and for different applications. Characterization of cellulose fibrils is challenging not only because of the wide size distribution and high aspect ratio but also due to the wide variety of morphological properties and the complex structure of single fibrils. This paper introduces a set of simple methods which gives the basic characteristics of nanocelluloses. Five commercially available cellulose nano/microfibrils and three self-made samples produced by and birch pulp ground to various levels using supermasscolloider equipment were analysed in detail. Different rheo- and viscometers were tested and a viscosity measurement sensitive towards high aspect ratio fibrils is introduced. The transmittance measurement gives an estimation of the amount of large particles and the optical microscopy effectively detects the amount of unfibrillated material. SEM measurements can be used to analyze the fine structure nanofibers. The aspect ratio, degree of fibrillation, fibril size and the amount of unfibrillated material can be evaluated with a combination of these indirect measurements, which provide a basic set for quality assurance.

AB - Nowadays the manufacturing of cellulose micro- and nanofibrils has been significantly developed and products with tailored properties can now be introduced. Different fibrillation methods and chemical treatments generate cellulose fibrils with varied dimensions, branching degree and chemical properties. It would be beneficial to classify the different kind of cellulose fibrils according to their properties with consensual agreement. We present here a classification based on the morphological and chemical properties of cellulose fibrils. We discuss the applicability of classification and different characterization methods for certain grades (from nanowhiskers and nanofibres to nano fibrillated materials with branched or ribbon-like structures) and for different applications. Characterization of cellulose fibrils is challenging not only because of the wide size distribution and high aspect ratio but also due to the wide variety of morphological properties and the complex structure of single fibrils. This paper introduces a set of simple methods which gives the basic characteristics of nanocelluloses. Five commercially available cellulose nano/microfibrils and three self-made samples produced by and birch pulp ground to various levels using supermasscolloider equipment were analysed in detail. Different rheo- and viscometers were tested and a viscosity measurement sensitive towards high aspect ratio fibrils is introduced. The transmittance measurement gives an estimation of the amount of large particles and the optical microscopy effectively detects the amount of unfibrillated material. SEM measurements can be used to analyze the fine structure nanofibers. The aspect ratio, degree of fibrillation, fibril size and the amount of unfibrillated material can be evaluated with a combination of these indirect measurements, which provide a basic set for quality assurance.

M3 - Conference abstract in proceedings

SN - 978-951-38-7604-3

T3 - VTT Symposium

SP - 15

EP - 15

BT - Novel nanostructured polymeric materials for food packaging and beyond

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Sneck A, Pitkänen M, Kangas H, Tammelin T, Hellen E. New approach to classification of cellulose fibrils and suitable methods for their characterization. In Novel nanostructured polymeric materials for food packaging and beyond: International Workshop: Book of Abstracts. Espoo: VTT Technical Research Centre of Finland. 2011. p. 15-15. (VTT Symposium; No. 270).