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

doi:10.1039/c6ra15015b

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

^*Corresponding author for this work

Not published at VTT

Research output: Contribution to journal › Article › Scientific › peer-review

30 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 language	English
Pages (from-to)	85100-85106
Journal	RSC Advances
Volume	6
Issue number	88
DOIs	https://doi.org/10.1039/c6ra15015b
Publication status	Published - 1 Jan 2016
MoE publication type	A1 Journal article-refereed

Access to Document

10.1039/c6ra15015b

Cite this

@article{5f3b0c5d54e64ce899dcedbbee569cb3,

title = "Preparation of photoreactive nanocellulosic materials: Via benzophenone grafting",

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.",

author = "Hannes Orelma and Maija Vuoriluoto and Johansson, {Leena Sisko} and Campbell, {Joseph M.} and Ilari Filpponen and Markus Biesalski and Rojas, {Orlando J.}",

year = "2016",

month = jan,

day = "1",

doi = "10.1039/c6ra15015b",

language = "English",

volume = "6",

pages = "85100--85106",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry RSC",

number = "88",

}

TY - JOUR

T1 - Preparation of photoreactive nanocellulosic materials

T2 - Via benzophenone grafting

AU - Orelma, Hannes

AU - Vuoriluoto, Maija

AU - Johansson, Leena Sisko

AU - Campbell, Joseph M.

AU - Filpponen, Ilari

AU - Biesalski, Markus

AU - Rojas, Orlando J.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84987623985&partnerID=8YFLogxK

U2 - 10.1039/c6ra15015b

DO - 10.1039/c6ra15015b

M3 - Article

AN - SCOPUS:84987623985

SN - 2046-2069

VL - 6

SP - 85100

EP - 85106

JO - RSC Advances

JF - RSC Advances

IS - 88

ER -

Preparation of photoreactive nanocellulosic materials: Via benzophenone grafting

Abstract

Access to Document

Other files and links

Fingerprint

Cite this