Fluorescently labeled cellulose nanofibrils for detection and loss analysis.
Cellulose nanofibrils
Films
Fluorescent
Localization
Nanocellulose
Nanopapers
Papers
Product safety
Journal
Carbohydrate polymers
ISSN: 1879-1344
Titre abrégé: Carbohydr Polym
Pays: England
ID NLM: 8307156
Informations de publication
Date de publication:
15 Dec 2020
15 Dec 2020
Historique:
received:
30
05
2020
revised:
10
08
2020
accepted:
11
08
2020
entrez:
14
10
2020
pubmed:
15
10
2020
medline:
15
10
2020
Statut:
ppublish
Résumé
Fluorescently labeled cellulose nanofibrils (CNFs) were used to evaluate CNF leaching from paper according to standard safety assays for food contact materials. Enzymatically pretreated pulp was first labeled with 5-([4,6-Dichlorotriazin-2-yl]amino)fluorescein hydrochloride (DTAF), followed by homogenization to produce fluorescent CNFs of varying degrees of fibrillation. Labeling at the μmolar DTAF/g cellulose level imparted quantitative ppb fluorescence detection of CNFs (LOD of approximately 20 ppb), without significantly altering other material properties, suggesting that DTAF-labeled CNFs are an appropriate mimic for native CNFs and that this approach can be used to detect low CNF concentrations. Cold and hot-water extractions of laboratory papers (100 % CNFs and CNF-fiber blended papers) showed loss values below 3 wt% CNFs, with the finest CNF quality showing the least loss overall and with greater loss experienced under hot water conditions compared with cold water. DTAF-labeled CNFs can be used to address questions related to CNF distribution, localization, and loss.
Identifiants
pubmed: 33049855
pii: S0144-8617(20)31116-4
doi: 10.1016/j.carbpol.2020.116943
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
116943Informations de copyright
Copyright © 2020 Elsevier Ltd. All rights reserved.