Preparation of photoreactive nanocellulosic materials

Via benzophenone grafting

Hannes Orelma, Maija Vuoriluoto, Leena Sisko Johansson, Joseph M. Campbell, Ilari Filpponen, Markus Biesalski, Orlando J. Rojas

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

A method for preparing photo-crosslinkable cellulose nanofibrils (CNF) was investigated. Benzophenone (BP), a UV-radical crosslinker, was chemically grafted to TEMPO-oxidized wood fibers in water/DMSO medium. This resulted in a reduction of carboxyl group content together with an increase of the number density of amide linkages. The BP-functionalized fibres were then microfluidized into TEMPO-oxidized CNF (TOCNF). As evidence of the crosslinking performance, the films of BP-activated TOCNF displayed improved water resistance upon UV curing (even under high energy sonication). In addition to improving wet strength the method is suitable for further modification of CNF, either by utilizing the remaining free carboxyl groups or via photochemical grafting of other substances onto the CNF structure.

Original languageEnglish
Pages (from-to)85100-85106
Number of pages7
JournalRSC Advances
Volume6
Issue number88
DOIs
Publication statusPublished - 1 Jan 2016
MoE publication typeA1 Journal article-refereed

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Cellulose
oxidized cellulose
Sonication
Water
Fibers
Dimethyl Sulfoxide
Amides
Crosslinking
Curing
Wood
TEMPO
benzophenone

Cite this

Orelma, H., Vuoriluoto, M., Johansson, L. S., Campbell, J. M., Filpponen, I., Biesalski, M., & Rojas, O. J. (2016). Preparation of photoreactive nanocellulosic materials: Via benzophenone grafting. RSC Advances, 6(88), 85100-85106. https://doi.org/10.1039/c6ra15015b
Orelma, Hannes ; Vuoriluoto, Maija ; Johansson, Leena Sisko ; Campbell, Joseph M. ; Filpponen, Ilari ; Biesalski, Markus ; Rojas, Orlando J. / Preparation of photoreactive nanocellulosic materials : Via benzophenone grafting. In: RSC Advances. 2016 ; Vol. 6, No. 88. pp. 85100-85106.
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abstract = "A method for preparing photo-crosslinkable cellulose nanofibrils (CNF) was investigated. Benzophenone (BP), a UV-radical crosslinker, was chemically grafted to TEMPO-oxidized wood fibers in water/DMSO medium. This resulted in a reduction of carboxyl group content together with an increase of the number density of amide linkages. The BP-functionalized fibres were then microfluidized into TEMPO-oxidized CNF (TOCNF). As evidence of the crosslinking performance, the films of BP-activated TOCNF displayed improved water resistance upon UV curing (even under high energy sonication). In addition to improving wet strength the method is suitable for further modification of CNF, either by utilizing the remaining free carboxyl groups or via photochemical grafting of other substances onto the CNF structure.",
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Orelma, H, Vuoriluoto, M, Johansson, LS, Campbell, JM, Filpponen, I, Biesalski, M & Rojas, OJ 2016, 'Preparation of photoreactive nanocellulosic materials: Via benzophenone grafting', RSC Advances, vol. 6, no. 88, pp. 85100-85106. https://doi.org/10.1039/c6ra15015b

Preparation of photoreactive nanocellulosic materials : Via benzophenone grafting. / Orelma, Hannes; Vuoriluoto, Maija; Johansson, Leena Sisko; Campbell, Joseph M.; Filpponen, Ilari; Biesalski, Markus; Rojas, Orlando J.

In: RSC Advances, Vol. 6, No. 88, 01.01.2016, p. 85100-85106.

Research output: Contribution to journalArticleScientificpeer-review

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T2 - Via benzophenone grafting

AU - Orelma, Hannes

AU - Vuoriluoto, Maija

AU - Johansson, Leena Sisko

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AU - Filpponen, Ilari

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Orelma H, Vuoriluoto M, Johansson LS, Campbell JM, Filpponen I, Biesalski M et al. Preparation of photoreactive nanocellulosic materials: Via benzophenone grafting. RSC Advances. 2016 Jan 1;6(88):85100-85106. https://doi.org/10.1039/c6ra15015b