RT Journal Article
T1 Influence of pretreatment and mechanical nanofibrillation energy on properties of nanofibers from Aspen cellulose
A1 Balea Martín, Ana
A1 Fuente González, Elena De La
A1 Tarrés, Quim
A1 Pèlach, Maria Àngels
A1 Mutjé, Pere
A1 Delgado-Aguilar, Marc
A1 Blanco Suárez, María Ángeles
A1 Negro Álvarez, Carlos Manuel
AB The characteristics of cellulose nanofibers (CNFs) depend on many factors such as the raw material, type and intensity of the pre-treatment, and type and severity of the mechanical defibrillation process. The relationship among factors is complex but crucial in determining the final, fit-for-use CNF properties. This study aims to find the relationship between the CNF properties morphology, aspect ratio, nanofibrillation yield, transmittance and cationic demand, and the production process using bleached Aspen thermomechanical pulp as the raw material. Five different types of pretreatments were carried out and five different defibrillation intensities of highpressure homogenization were evaluated. Pretreatments were: PFI refining at 20,000 revolutions, enzymatic hydrolysis with 80 and 240 g of enzyme per ton of dry pulp and TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl)–mediated oxidation with 5 and 15 mmol of NaClO per gram of dry pulp. From the twenty-five different procedures evaluated, results show that both the pretreatment and the severity of the high-pressure homogenization determined both the fibrillation yield and the CNF morphology. Moreover, the main properties of CNFs (cationic demand, yield, transmittance and aspect ratio) can be estimated from the carboxylic content of the pretreated pulp, which would facilitate the control of the CNF production and their tuning according to the production needs.
PB Springer Nature
SN 0969-0239
YR 2021
FD 2021
LK https://hdl.handle.net/20.500.14352/4682
UL https://hdl.handle.net/20.500.14352/4682
LA eng
NO Balea, A., et al. «Influence of Pretreatment and Mechanical Nanofibrillation Energy on Properties of Nanofibers from Aspen Cellulose». Cellulose, vol. 28, n.o 14, septiembre de 2021, pp. 9187-206. DOI.org (Crossref), https://doi.org/10.1007/s10570-021-04109-w.
NO CRUE-CSIC (Acuerdos Transformativos 2021)
NO Ministerio de Economía y Competitividad (España)
NO Comunidad de Madrid
DS Docta Complutense
RD 3 oct 2024