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

Research output: Contribution to conferenceConference articleScientificpeer-review

6 Citations (Scopus)

Abstract

Five commercially available cellulose micro/nanofibers and birch pulp ground to various levels using supermasscolloider equipment were analyzed using different characterization methods. Viscosity, transmittance and microscopy measurements turned out to provide a basic set for quality assurance. Together they gave the aspect ratio, degree of fibrillation, fibril size and the amount of unfibrillated material. Viscosity was found to be sensitive to high aspect ratio fibrils, giving an estimate of the amount of thin fibrils. The transmittance measurement correlated well with the amount of large particles and the optical microscopy effectively detected the amount of unfibrillated material. SEM measurements could be used to analyze the fine structure of fibrils. It would be beneficial to classify the different kind of cellulose fibrils according to their properties with a consensual agreement. ISO/TR 11360 announced classification system for nanomaterials but more comprehensive classification for nanocellulose is needed. Here we discuss the applicability of the above mentioned classification and how it relates to different characterization methods for certain grades (from nanowhiskers and nanofibres to nano fibrillated materials with branched or ribbon-like structures). In the future, commensurable characterization methods are needed in order to compare results between laboratories worldwide
Original languageEnglish
Publication statusPublished - 2011
EventTAPPI International Conference on Nanotechnology for Renewable Materials 2011 - Washington, United States
Duration: 6 Jun 20118 Jun 2011

Conference

ConferenceTAPPI International Conference on Nanotechnology for Renewable Materials 2011
CountryUnited States
CityWashington
Period6/06/118/06/11

Fingerprint

Cellulose
Nanofibers
Aspect ratio
Nanowhiskers
Viscosity
Quality assurance
Nanostructured materials
Pulp
Optical microscopy
Microscopic examination
Scanning electron microscopy

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. Paper presented at TAPPI International Conference on Nanotechnology for Renewable Materials 2011, Washington, United States.
Sneck, Asko ; Pitkänen, Marja ; Kangas, Heli ; Tammelin, Tekla ; Hellen, Erkki. / New approach to classification of cellulose fibrils and suitable methods for their characterization. Paper presented at TAPPI International Conference on Nanotechnology for Renewable Materials 2011, Washington, United States.
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abstract = "Five commercially available cellulose micro/nanofibers and birch pulp ground to various levels using supermasscolloider equipment were analyzed using different characterization methods. Viscosity, transmittance and microscopy measurements turned out to provide a basic set for quality assurance. Together they gave the aspect ratio, degree of fibrillation, fibril size and the amount of unfibrillated material. Viscosity was found to be sensitive to high aspect ratio fibrils, giving an estimate of the amount of thin fibrils. The transmittance measurement correlated well with the amount of large particles and the optical microscopy effectively detected the amount of unfibrillated material. SEM measurements could be used to analyze the fine structure of fibrils. It would be beneficial to classify the different kind of cellulose fibrils according to their properties with a consensual agreement. ISO/TR 11360 announced classification system for nanomaterials but more comprehensive classification for nanocellulose is needed. Here we discuss the applicability of the above mentioned classification and how it relates to different characterization methods for certain grades (from nanowhiskers and nanofibres to nano fibrillated materials with branched or ribbon-like structures). In the future, commensurable characterization methods are needed in order to compare results between laboratories worldwide",
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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' Paper presented at TAPPI International Conference on Nanotechnology for Renewable Materials 2011, Washington, United States, 6/06/11 - 8/06/11, .

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

2011. Paper presented at TAPPI International Conference on Nanotechnology for Renewable Materials 2011, Washington, United States.

Research output: Contribution to conferenceConference articleScientificpeer-review

TY - CONF

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

N1 - Powerpoint Project code: 72396

PY - 2011

Y1 - 2011

N2 - Five commercially available cellulose micro/nanofibers and birch pulp ground to various levels using supermasscolloider equipment were analyzed using different characterization methods. Viscosity, transmittance and microscopy measurements turned out to provide a basic set for quality assurance. Together they gave the aspect ratio, degree of fibrillation, fibril size and the amount of unfibrillated material. Viscosity was found to be sensitive to high aspect ratio fibrils, giving an estimate of the amount of thin fibrils. The transmittance measurement correlated well with the amount of large particles and the optical microscopy effectively detected the amount of unfibrillated material. SEM measurements could be used to analyze the fine structure of fibrils. It would be beneficial to classify the different kind of cellulose fibrils according to their properties with a consensual agreement. ISO/TR 11360 announced classification system for nanomaterials but more comprehensive classification for nanocellulose is needed. Here we discuss the applicability of the above mentioned classification and how it relates to different characterization methods for certain grades (from nanowhiskers and nanofibres to nano fibrillated materials with branched or ribbon-like structures). In the future, commensurable characterization methods are needed in order to compare results between laboratories worldwide

AB - Five commercially available cellulose micro/nanofibers and birch pulp ground to various levels using supermasscolloider equipment were analyzed using different characterization methods. Viscosity, transmittance and microscopy measurements turned out to provide a basic set for quality assurance. Together they gave the aspect ratio, degree of fibrillation, fibril size and the amount of unfibrillated material. Viscosity was found to be sensitive to high aspect ratio fibrils, giving an estimate of the amount of thin fibrils. The transmittance measurement correlated well with the amount of large particles and the optical microscopy effectively detected the amount of unfibrillated material. SEM measurements could be used to analyze the fine structure of fibrils. It would be beneficial to classify the different kind of cellulose fibrils according to their properties with a consensual agreement. ISO/TR 11360 announced classification system for nanomaterials but more comprehensive classification for nanocellulose is needed. Here we discuss the applicability of the above mentioned classification and how it relates to different characterization methods for certain grades (from nanowhiskers and nanofibres to nano fibrillated materials with branched or ribbon-like structures). In the future, commensurable characterization methods are needed in order to compare results between laboratories worldwide

M3 - Conference article

ER -

Sneck A, Pitkänen M, Kangas H, Tammelin T, Hellen E. New approach to classification of cellulose fibrils and suitable methods for their characterization. 2011. Paper presented at TAPPI International Conference on Nanotechnology for Renewable Materials 2011, Washington, United States.