Cellulose gelation in NaOH(aq) by CO2 absorption: Effects of holding time and concentration on biomaterial development

Guillermo Reyes; Rubina Ajdary; Esko Kankuri; Joice J. Kaschuk; Harri Kosonen; Orlando J. Rojas

doi:10.1016/j.carbpol.2022.120355

Cellulose gelation in NaOH_(aq) by CO₂ absorption: Effects of holding time and concentration on biomaterial development

Guillermo Reyes^*, Rubina Ajdary, Esko Kankuri, Joice J. Kaschuk, Harri Kosonen, Orlando J. Rojas

^*Corresponding author for this work

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

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Abstract

We address the limited solubility and early onset of gelation of aqueous sodium hydroxide to position it as a preferred green solvent for cellulose. For this purpose, we expand the concentration window (up to 12 wt%) by using a CO₂-depleted air and adjusting the time the dope remains in the given atmosphere, before further processing (holding time) and regeneration conditions. Cellulose solutions are extruded following characteristic (rheology and extrusion) parameters to yield aligned filaments reaching tenacities up to 2.3 cN·dtex⁻¹, similar to that of viscose. Further material demonstrations are achieved by direct ink writing of auxetic biomedical meshes (Poisson's ratio of −0.2, tensile strength of 115 kPa) and transparent films, which achieved a tensile strength and toughness of 47 MPa and 590 kJ·m⁻³, respectively. The results suggest an excellent outlook for cellulose transformation into bioproducts. Key to this development is the control of the gelation ensuing solution flow and polymer alignment, which depend on CO₂ absorption, cellulose concentration, and holding time.

Original language	English
Article number	120355
Number of pages	8
Journal	Carbohydrate Polymers
Volume	302
Early online date	28 Nov 2022
DOIs	https://doi.org/10.1016/j.carbpol.2022.120355
Publication status	Published - 15 Feb 2023
MoE publication type	A1 Journal article-refereed

Keywords

Additive manufacturing
Alkali cellulose
Cellulose rheology
Cellulose spinning
Cellulose textiles
CO absorption
CO capture

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.carbpol.2022.120355Licence: CC BY

CHEM_Reyes_et_al_Cellulose_gelation_in_NaOH_2022_Carbohydrate_PolymersFinal published version, 4.61 MBLicence: CC BY

Cite this

@article{c090aacb54a041e09dd5729a87344bf7,

title = "Cellulose gelation in NaOH(aq) by CO2 absorption: Effects of holding time and concentration on biomaterial development",

abstract = "We address the limited solubility and early onset of gelation of aqueous sodium hydroxide to position it as a preferred green solvent for cellulose. For this purpose, we expand the concentration window (up to 12 wt%) by using a CO2-depleted air and adjusting the time the dope remains in the given atmosphere, before further processing (holding time) and regeneration conditions. Cellulose solutions are extruded following characteristic (rheology and extrusion) parameters to yield aligned filaments reaching tenacities up to 2.3 cN·dtex−1, similar to that of viscose. Further material demonstrations are achieved by direct ink writing of auxetic biomedical meshes (Poisson's ratio of −0.2, tensile strength of 115 kPa) and transparent films, which achieved a tensile strength and toughness of 47 MPa and 590 kJ·m−3, respectively. The results suggest an excellent outlook for cellulose transformation into bioproducts. Key to this development is the control of the gelation ensuing solution flow and polymer alignment, which depend on CO2 absorption, cellulose concentration, and holding time.",

keywords = "Additive manufacturing, Alkali cellulose, Cellulose rheology, Cellulose spinning, Cellulose textiles, CO absorption, CO capture",

author = "Guillermo Reyes and Rubina Ajdary and Esko Kankuri and Kaschuk, {Joice J.} and Harri Kosonen and Rojas, {Orlando J.}",

note = "| openaire: EC/H2020/788489/EU//BioELCell Funding Information: GR acknowledges the contribution of UPM and support of the Academy of Finland's Flagship, Competence Center for Materials Bioeconomy, FinnCERES [grant numbers 318890, 318891]. GR, RA, JJK, and OJR are grateful for the support received from the ERC Advanced Grant Agreement No. 788489 (“BioElCell”) and The Canada Excellence Research Chair Program (CERC-2018-00006), as well as Canada Foundation for Innovation (Project number 38623). The provision of facilities and technical support by Aalto University at OtaNano - Nanomicroscopy Center (Aalto-NMC) is also gratefully acknowledged. Publisher Copyright: {\textcopyright} 2022 The Author(s)",

year = "2023",

month = feb,

day = "15",

doi = "10.1016/j.carbpol.2022.120355",

language = "English",

volume = "302",

journal = "Carbohydrate Polymers",

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TY - JOUR

T1 - Cellulose gelation in NaOH(aq) by CO2 absorption: Effects of holding time and concentration on biomaterial development

AU - Reyes, Guillermo

AU - Ajdary, Rubina

AU - Kankuri, Esko

AU - Kaschuk, Joice J.

AU - Kosonen, Harri

AU - Rojas, Orlando J.

N1 - | openaire: EC/H2020/788489/EU//BioELCell Funding Information: GR acknowledges the contribution of UPM and support of the Academy of Finland's Flagship, Competence Center for Materials Bioeconomy, FinnCERES [grant numbers 318890, 318891]. GR, RA, JJK, and OJR are grateful for the support received from the ERC Advanced Grant Agreement No. 788489 (“BioElCell”) and The Canada Excellence Research Chair Program (CERC-2018-00006), as well as Canada Foundation for Innovation (Project number 38623). The provision of facilities and technical support by Aalto University at OtaNano - Nanomicroscopy Center (Aalto-NMC) is also gratefully acknowledged. Publisher Copyright: © 2022 The Author(s)

PY - 2023/2/15

Y1 - 2023/2/15

N2 - We address the limited solubility and early onset of gelation of aqueous sodium hydroxide to position it as a preferred green solvent for cellulose. For this purpose, we expand the concentration window (up to 12 wt%) by using a CO2-depleted air and adjusting the time the dope remains in the given atmosphere, before further processing (holding time) and regeneration conditions. Cellulose solutions are extruded following characteristic (rheology and extrusion) parameters to yield aligned filaments reaching tenacities up to 2.3 cN·dtex−1, similar to that of viscose. Further material demonstrations are achieved by direct ink writing of auxetic biomedical meshes (Poisson's ratio of −0.2, tensile strength of 115 kPa) and transparent films, which achieved a tensile strength and toughness of 47 MPa and 590 kJ·m−3, respectively. The results suggest an excellent outlook for cellulose transformation into bioproducts. Key to this development is the control of the gelation ensuing solution flow and polymer alignment, which depend on CO2 absorption, cellulose concentration, and holding time.

AB - We address the limited solubility and early onset of gelation of aqueous sodium hydroxide to position it as a preferred green solvent for cellulose. For this purpose, we expand the concentration window (up to 12 wt%) by using a CO2-depleted air and adjusting the time the dope remains in the given atmosphere, before further processing (holding time) and regeneration conditions. Cellulose solutions are extruded following characteristic (rheology and extrusion) parameters to yield aligned filaments reaching tenacities up to 2.3 cN·dtex−1, similar to that of viscose. Further material demonstrations are achieved by direct ink writing of auxetic biomedical meshes (Poisson's ratio of −0.2, tensile strength of 115 kPa) and transparent films, which achieved a tensile strength and toughness of 47 MPa and 590 kJ·m−3, respectively. The results suggest an excellent outlook for cellulose transformation into bioproducts. Key to this development is the control of the gelation ensuing solution flow and polymer alignment, which depend on CO2 absorption, cellulose concentration, and holding time.

KW - Additive manufacturing

KW - Alkali cellulose

KW - Cellulose rheology

KW - Cellulose spinning

KW - Cellulose textiles

KW - CO absorption

KW - CO capture

UR - http://www.scopus.com/inward/record.url?scp=85142746931&partnerID=8YFLogxK

U2 - 10.1016/j.carbpol.2022.120355

DO - 10.1016/j.carbpol.2022.120355

M3 - Article

AN - SCOPUS:85142746931

SN - 0144-8617

VL - 302

JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

M1 - 120355

ER -

Cellulose gelation in NaOH_(aq) by CO₂ absorption: Effects of holding time and concentration on biomaterial development

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

BioELCell: Bioproducts Engineered from Lignocelluloses: from plants and upcycling to next generation materials

FinnCERES: Competence Center for the Materials Bioeconomy: A Flagship for our Sustainable Future

OtaNano

OtaNano - Nanomicroscopy Center

Cite this

Cellulose gelation in NaOH(aq) by CO2 absorption: Effects of holding time and concentration on biomaterial development

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Projects

BioELCell: Bioproducts Engineered from Lignocelluloses: from plants and upcycling to next generation materials

FinnCERES: Competence Center for the Materials Bioeconomy: A Flagship for our Sustainable Future

Equipment

OtaNano

OtaNano - Nanomicroscopy Center

Cite this

Cellulose gelation in NaOH_(aq) by CO₂ absorption: Effects of holding time and concentration on biomaterial development