Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 5749-5770 |
| Number of pages | 22 |
| Journal | BioResources |
| Volume | 7 |
| Issue number | 4 |
| Publication status | Published - 2012 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- nanocellulose
- laccase
- grafting
- dodecyl gallate
- contact angle
- matrix-assisted laser desorption/ionization time-of-flight mass spectroscopy
- MALDI-TOF MS
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Laccase aided modification of nanofibrillated cellulose with dodecyl gallate. / Saastamoinen, Päivi (Corresponding Author); Mattinen, Maija; Hippi, Ulla; Nousiainen, Paula; Sipilä, Jussi; Lille, Martina; Suurnäkki, Anna; Pere, Jaakko.
In: BioResources, Vol. 7, No. 4, 2012, p. 5749-5770.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Laccase aided modification of nanofibrillated cellulose with dodecyl gallate
AU - Saastamoinen, Päivi
AU - Mattinen, Maija
AU - Hippi, Ulla
AU - Nousiainen, Paula
AU - Sipilä, Jussi
AU - Lille, Martina
AU - Suurnäkki, Anna
AU - Pere, Jaakko
PY - 2012
Y1 - 2012
N2 - Nanofibrillated cellulose, NFC, is an interesting wood fibre-based material that could be utilized in coatings, foams, composites, packages, dispersions, and emulsions, due to its high tensile strength and barrier properties, light weight, and stabilizing features. To improve applicability and properties of NFC, modification of its surface properties is often needed. In this study, the applicability of laccase-aided surface modification with hydrophobic dodecyl gallate (DOGA) on unbleached NFC was investigated. Also, laccase-catalyzed polymerization of DOGA and other phenolic compounds with lignin moieties was investigated by matrix-assisted laser desorption/ionization time-of-flight mass spectroscopy (MALDI-TOF MS). NFC modified with T. hirsuta-based laccase and DOGA showed decreased hydrophilicity, as compared with the native NFC, when coated on a paper surface. When dried as free-standing films, the surface properties of chemo-enzymatically modified NFC resembled those of the native NFC. The effect of modification was thus greatly influenced by different surface formation in differently prepared samples. Also, changing of the dispersion properties of DOGA by enzymatic polymerization affected the surface properties of the dried NFC samples. Covalent bonding between DOGA and NFC was not the main factor affecting the surface properties of the NFC in free-standing films or coatings.
AB - Nanofibrillated cellulose, NFC, is an interesting wood fibre-based material that could be utilized in coatings, foams, composites, packages, dispersions, and emulsions, due to its high tensile strength and barrier properties, light weight, and stabilizing features. To improve applicability and properties of NFC, modification of its surface properties is often needed. In this study, the applicability of laccase-aided surface modification with hydrophobic dodecyl gallate (DOGA) on unbleached NFC was investigated. Also, laccase-catalyzed polymerization of DOGA and other phenolic compounds with lignin moieties was investigated by matrix-assisted laser desorption/ionization time-of-flight mass spectroscopy (MALDI-TOF MS). NFC modified with T. hirsuta-based laccase and DOGA showed decreased hydrophilicity, as compared with the native NFC, when coated on a paper surface. When dried as free-standing films, the surface properties of chemo-enzymatically modified NFC resembled those of the native NFC. The effect of modification was thus greatly influenced by different surface formation in differently prepared samples. Also, changing of the dispersion properties of DOGA by enzymatic polymerization affected the surface properties of the dried NFC samples. Covalent bonding between DOGA and NFC was not the main factor affecting the surface properties of the NFC in free-standing films or coatings.
KW - nanocellulose
KW - laccase
KW - grafting
KW - dodecyl gallate
KW - contact angle
KW - matrix-assisted laser desorption/ionization time-of-flight mass spectroscopy
KW - MALDI-TOF MS
M3 - Article
VL - 7
SP - 5749
EP - 5770
JO - BioResources
JF - BioResources
SN - 1930-2126
IS - 4
ER -