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Chinga-Carrasco, GaryORCID iD iconorcid.org/0000-0002-6183-2017
Publications (10 of 87) Show all publications
Heggset, E. B., Strand, B. L., Sundby, K. W., Simon, S., Chinga-Carrasco, G. & Syverud, K. (2019). Viscoelastic properties of nanocellulose based inks for 3D printing and mechanical properties of CNF/alginate biocomposite gels. Cellulose (London) (1), 581-595
Open this publication in new window or tab >>Viscoelastic properties of nanocellulose based inks for 3D printing and mechanical properties of CNF/alginate biocomposite gels
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2019 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, no 1, p. 581-595Article in journal (Refereed) Published
Abstract [en]

Inks for 3D printing based on cellulose nanofibrils (CNFs) or mixtures of CNFs and either cellulose nanocrystals (CNCs) or alginate were assessed by determining their viscoelastic properties i.e. complex viscosity and storage and loss moduli (G′ and G″). Two types of alginates were used, i.e. from Laminaria hyperborea stipe and Macrocystis pyrifera. Shape fidelity of 3D printed grids were qualitatively evaluated and compared to the viscoelastic properties of the inks. The biocomposite gels containing alginate were post stabilized by crosslinking with Ca2+. Mechanical properties of the crosslinked biocomposite gels were assessed. The complex viscosity, G′ and G″ of CNF suspensions increased when the solid content was increased from 3.5 to 4.0 wt%, but levelled off by further increase in CNF solid content. The complex viscosity at low angular frequency at 4 wt% was as high as 104 Pa·s. This seemed to be the necessary viscosity level for obtaining good shape fidelity of the printed structures for the studied systems. By replacing part of the CNFs with CNCs, the complex viscosity, G′ and G″ were reduced and so was also the shape fidelity of the printed grids. The changes in complex viscosity and moduli when CNFs was replaced with alginate depended on the relative amounts of CNFs/alginate. The type of alginate (from either L. hyp. stipe or M. pyr.) did not play a role for the viscoelastic properties of the inks, nor for the printed grids before post stabilization. Replacing CNFs with up to 1.5 wt% alginate gave satisfactory shape fidelity. The effect of adding alginate and subsequent crosslinking with Ca2+, strongly affected the strength properties of the gels. By appropriate choice of relative amounts of CNFs and alginate and type of alginate, the Young’s modulus and rupture strength could be controlled within the range of 30–150 kPa and 1.5–6 kg, respectively. The deformation at rupture was around 55%. The alginate from L. hyp. stipe yields higher Young’s modulus and lower syneresis compared to M. pyr. This shows that the choice of alginate plays a significant role for the mechanical properties of the final product, although it does not influence on the viscoelastic properties of the ink. The choice of alginate should be L. hyp. stipe if high strength is desired.

Keywords
Alginate, Cellulose, Cellulose derivatives, Composite materials, Hydrogels, Mechanical properties, Nanocellulose, Rheology, Suspensions, Viscoelasticity, Viscosity, 3-D printing
National Category
Nano Technology Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-36660 (URN)10.1007/s10570-018-2142-3 (DOI)2-s2.0-85057032463 (Scopus ID)
Available from: 2018-12-20 Created: 2018-12-20 Last updated: 2019-03-06Bibliographically approved
Filgueira, D., Holmen, S., Melbø, J. K., Moldes, D., Echtermeyer, A. T. & Chinga-Carrasco, G. (2018). 3D printable filaments made of biobased polyethylene biocomposites. Polymers, 10(3), Article ID 314.
Open this publication in new window or tab >>3D printable filaments made of biobased polyethylene biocomposites
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2018 (English)In: Polymers, ISSN 2073-4360, E-ISSN 2073-4360, Vol. 10, no 3, article id 314Article in journal (Refereed) Published
Abstract [en]

Two different series of biobased polyethylene (BioPE) were used for the manufacturing of biocomposites, complemented with thermomechanical pulp (TMP) fibers. The intrinsic hydrophilic character of the TMP fibers was previously modified by grafting hydrophobic compounds (octyl gallate and lauryl gallate) by means of an enzymatic-assisted treatment. BioPE with low melt flow index (MFI) yielded filaments with low void fraction and relatively low thickness variation. The water absorption of the biocomposites was remarkably improved when the enzymatically-hydrophobized TMP fibers were used. Importantly, the 3D printing of BioPE was improved by adding 10% and 20% TMP fibers to the composition. Thus, 3D printable biocomposites with low water uptake can be manufactured by using fully biobased materials and environmentally-friendly processes.

Keywords
3D printing, Biocomposites, BioPE, Grafting, Laccase, Lauryl gallate, Octyl gallate, TMP, Composite materials, Fibers, Grafting (chemical), Hydrophobicity, Polyethylenes, Thermomechanical pulp, Thermomechanical pulping process, Void fraction, Water absorption, 3-D printing, Bio-composites, Laccases, 3D printers
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33507 (URN)10.3390/polym10030314 (DOI)2-s2.0-85043719493 (Scopus ID)
Available from: 2018-03-23 Created: 2018-03-23 Last updated: 2018-08-14Bibliographically approved
Tarrés, Q., Melbø, J. K., Delgado-Aguilar, M., Espinach, F. X., Mutjé, P. & Chinga-Carrasco, G. (2018). Bio-polyethylene reinforced with thermomechanical pulp fibers: Mechanical and micromechanical characterization and its application in 3D-printing by fused deposition modelling. Composites Part B: Engineering, 153, 70-77
Open this publication in new window or tab >>Bio-polyethylene reinforced with thermomechanical pulp fibers: Mechanical and micromechanical characterization and its application in 3D-printing by fused deposition modelling
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2018 (English)In: Composites Part B: Engineering, ISSN 1359-8368, E-ISSN 1879-1069, Vol. 153, p. 70-77Article in journal (Refereed) Published
Abstract [en]

Two biobased polyethylenes (BioPE) and thermomechanical pulp (TMP) fibers were used to produce biocomposites. The impact of TMP fibers on the mechanical properties was assessed in detail. An increase on the viscosity of the melted biocomposites was quantified and was related to the incorporation of the TMP fibers (0–30% w/w). The impact of polyethylene functionalized with maleic anhydride (MAPE) on the mechanical properties was quantified. Compared to neat BioPEs, a maximum increase of tensile strength between 115 and 127% was obtained, for the biocomposites containing 6% w/w of MAPE and 30% w/w TMP fibers. The formulated biocomposites containing 10 and 20% TMP fibers were three-dimensional (3D) printed, by fused deposition modelling. We confirmed that TMP fibers facilitated the 3D printing and correspondingly improved the mechanical properties of the biocomposite materials.

Keywords
3D printing, Biocomposites, Biopolyethylene, Mechanical properties, Natural fibers, 3D printers, Deposition, Polyethylenes, Reinforced plastics, Tensile strength, Thermomechanical pulp, Three dimensional computer graphics, 3-D printing, Bio-composites, Biocomposite materials, Fused deposition modelling, ITS applications, Micromechanical characterization, Threedimensional (3-d), Thermomechanical pulping process, Impact, Increments, Polyethylene, Thermomechanical Pulps
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-34572 (URN)10.1016/j.compositesb.2018.07.009 (DOI)2-s2.0-85050243089 (Scopus ID)
Note

Funding details: PFI, Population Foundation of India; Funding details: FP1405, COST, European Cooperation in Science and Technology; Funding details: 245270, Norges Forskningsråd; Funding details: 271054, Norges Forskningsråd;

Available from: 2018-08-14 Created: 2018-08-14 Last updated: 2019-03-06Bibliographically approved
Valdebenito, F., García, R., Cruces, K., Ciudad, G., Chinga-Carrasco, G. & Habibi, Y. (2018). CO2 Adsorption of Surface-Modified Cellulose Nanofibril Films Derived from Agricultural Wastes. ACS Sustainable Chemistry and Engineering, 6(10), 12603-12612
Open this publication in new window or tab >>CO2 Adsorption of Surface-Modified Cellulose Nanofibril Films Derived from Agricultural Wastes
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2018 (English)In: ACS Sustainable Chemistry and Engineering, ISSN 2168-0485, Vol. 6, no 10, p. 12603-12612Article in journal (Refereed) Published
Abstract [en]

The present work demonstrates a simple and straightforward chemical modification of cellulose nanofibril (CNF) films in order to produce CO2 adsorbent materials. The CNF films were obtained from two agricultural residues, i.e. corn husks and oat hulls. CNF from kraft pulp was used for comparison purposes. Controlled surface silylation was conducted on the preformed CNF films in aqueous media under mild conditions using three aminosilanes bearing mono, di, and triamine groups. The success of the grafting of the aminosilanes on the CNF films was demonstrated by Fourier transform infrared and X-ray photoelectron spectroscopy analyses. The results of the contact angle measurements and field emission scanning electron microscopy coupled with energy dispersive spectroscopy showed homogeneous coverage by the amino groups on the surface of the modified CNF films, particularly with the diaminosilane N-[3-(trimethoxysilyl)propyl]ethylenediamine (DAMO). The produced films were thermally stable, and when subjected to 99.9% CO2 flow at 25 °C, these modified films showed good adsorption of CO2. Indeed, after 3 h of exposure the adsorbed concentration of CO2 of the CNF films modified with DAMO was 0.90, 1.27, and 2.11 mmol CO2 g-1 polymer for CNF films from corn husks, oat hulls, and kraft pulp, respectively.

Keywords
Cellulose nanofibrils, CO2 adsorbent material, Functionalization, Agricultural wastes, Agriculture, Carbon dioxide, Cellulose, Chemical modification, Contact angle, Energy dispersive spectroscopy, Field emission microscopes, Kraft pulp, Nanofibers, Polymer films, Scanning electron microscopy, X ray photoelectron spectroscopy, Adsorption of CO2, CO2 adsorbents, Ethylene diamine, Field emission scanning electron microscopy, Fourier transform infra reds, Functionalizations, Surface silylation, Cellulose films
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-35616 (URN)10.1021/acssuschemeng.8b00771 (DOI)2-s2.0-85053724689 (Scopus ID)
Note

Funding details: 271054; Funding details: ValBio-3D, UFRO, Universidad de La Frontera;

Available from: 2018-11-06 Created: 2018-11-06 Last updated: 2018-11-06Bibliographically approved
Chinga-Carrasco, G. (2018). Novel biocomposite engineering and bio-applications. Bioengineering, 5(4), 80
Open this publication in new window or tab >>Novel biocomposite engineering and bio-applications
2018 (English)In: Bioengineering, ISSN 2306-5354, Vol. 5, no 4, p. 80-Article in journal, Editorial material (Other academic) Published
Keywords
bio-based composite
National Category
Composite Science and Engineering
Identifiers
urn:nbn:se:ri:diva-36658 (URN)10.3390/bioengineering5040080 (DOI)2-s2.0-85056786643 (Scopus ID)
Available from: 2018-12-20 Created: 2018-12-20 Last updated: 2019-03-06Bibliographically approved
Chinga-Carrasco, G. (2018). Por una ciencia integrada. Celulosa Y Papel, 34(4), 12-15
Open this publication in new window or tab >>Por una ciencia integrada
2018 (Spanish)In: Celulosa Y Papel, ISSN 0716-2308, Vol. 34, no 4, p. 12-15Article in journal (Other academic) Published
Place, publisher, year, edition, pages
ATCP, 2018
Keywords
nanocellulose
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-37043 (URN)2-s2.0-85058649063 (Scopus ID)
Note

cited By 0

Available from: 2019-01-15 Created: 2019-01-15 Last updated: 2019-01-15Bibliographically approved
Chinga-Carrasco, G. (2018). Potential and Limitations of Nanocelluloses as Components in Biocomposite Inks for Three-Dimensional Bioprinting and for Biomedical Devices.. Biomacromolecules, 19(3), 701-711
Open this publication in new window or tab >>Potential and Limitations of Nanocelluloses as Components in Biocomposite Inks for Three-Dimensional Bioprinting and for Biomedical Devices.
2018 (English)In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 19, no 3, p. 701-711Article in journal (Refereed) Published
Abstract [en]

Three-dimensional (3D) printing has rapidly emerged as a new technology with a wide range of applications that includes biomedicine. Some common 3D printing methods are based on the suitability of biopolymers to be extruded through a nozzle to construct a 3D structure layer by layer. Nanocelluloses with specific rheological characteristics are suitable components to form inks for 3D printing. This review considers various nanocelluloses that have been proposed for 3D printing with a focus on the potential advantages, limitations, and requirements when used for biomedical devices and when used in contact with the human body.

National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33357 (URN)10.1021/acs.biomac.8b00053 (DOI)29489338 (PubMedID)2-s2.0-85043597065 (Scopus ID)
Available from: 2018-03-01 Created: 2018-03-01 Last updated: 2018-12-14Bibliographically approved
Chinga-Carrasco, G., Ehman, N. V., Pettersson, J., Vallejos, M. E., Brodin, M., Felissia, F. E., . . . Area, M. C. (2018). Pulping and Pretreatment Affect the Characteristics of Bagasse Inks for Three-dimensional Printing. ACS Sustainable Chemistry and Engineering, 6(3), 4068-4075
Open this publication in new window or tab >>Pulping and Pretreatment Affect the Characteristics of Bagasse Inks for Three-dimensional Printing
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2018 (English)In: ACS Sustainable Chemistry and Engineering, ISSN 2168-0485, Vol. 6, no 3, p. 4068-4075Article in journal (Refereed) Published
Abstract [en]

Bagasse is an underutilized agro-industrial residue with great potential as raw material for the production of cellulose nanofibrils (CNF) for a range of applications. In this study, we have assessed the suitability of bagasse for production of CNF for three-dimensional (3D) printing. First, pulp fibers were obtained from the bagasse raw material using two fractionation methods, i.e. soda and hydrothermal treatment combined with soda. Second, the pulp fibers were pretreated by TEMPO-mediated oxidation using two levels of oxidation for comparison purposes. Finally, the CNF were characterized in detail and assessed as inks for 3D printing. The results show that CNF produced from fibers obtained by hydrothermal and soda pulping were less nanofibrillated than the corresponding material produced by soda pulping. However, the CNF sample obtained from soda pulp was cytotoxic, apparently due to a larger content of silica particles. All the CNF materials were 3D printable. We conclude that the noncytotoxic CNF produced from hydrothermally and soda treated pulp can potentially be used as inks for 3D printing of biomedical devices. 

Keywords
3D printing, Biomedical devices, Characterization, Chemical modification, Nanocellulose, Bagasse, Cellulose, Silica, 3-D printing, Agro-industrial residue, Cellulose nanofibrils, Fractionation methods, Hydrothermal treatments, TEMPO-mediated oxidation, Three-dimensional (3D) printing, 3D printers, Chemical Treatment, Printing, Three Dimensional Design
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33512 (URN)10.1021/acssuschemeng.7b04440 (DOI)2-s2.0-85043320290 (Scopus ID)
Note

Funding details: UN, Universidad Nacional de Colombia; Funding details: CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas; Funding details: NTNU, National Taiwan Normal University; Funding details: EDS; Funding details: PFI, Population Foundation of India; Funding details: 271054, Norges Forskningsråd; 

Available from: 2018-03-23 Created: 2018-03-23 Last updated: 2018-12-20Bibliographically approved
Rusu, C., Brodin, M., Hausvik, T. I., Hindersland, L. K., Chinga-Carrasco, G., Einarsrud, M. A. & Lein, H. (2018). The potential of functionalized ceramic particles in coatings for improved scratch resistance. Coatings, 8(6), Article ID 224.
Open this publication in new window or tab >>The potential of functionalized ceramic particles in coatings for improved scratch resistance
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2018 (English)In: Coatings, ISSN 2079-6412, Vol. 8, no 6, article id 224Article in journal (Refereed) Published
Abstract [en]

The top layer of a typical high pressure floor laminate (HPL) consists of a melamine formaldehyde (MF) impregnated special wear layer (overlay) with alumina particles. This top layer plays a crucial role in determining the mechanical properties of the laminate. For HPLs, scratch resistance and scratch visibility are particularly important properties. This study aimed to improve the mechanical properties, particularly the scratch resistance, by adjusting the composition of the overlay. Laminates containing alumina particles were prepared and tested. These alumina particles were additionally functionalized with a silane coupling agent to ensure better adhesion between the particles and the resin. The functionalized particles led to enhanced scratch resistance of the laminates as well as improved dispersion of the particles within the resin. Micro scratch testing revealed that by using functionalized particles, the scratch surface damage was reduced and the recovery characteristics of the surface layer were improved. Higher scratch resistance and scratch hardness were thus obtained, along with a reduced scratch visibility.

Keywords
Alumina, Functionalization, High pressure laminates (HPL), Overlay, Scratch hardness, Scratch resistance, Scratch visibility, Silane coupling agent
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-35061 (URN)10.3390/coatings8060224 (DOI)2-s2.0-85051584443 (Scopus ID)
Available from: 2018-08-27 Created: 2018-08-27 Last updated: 2018-08-27
Filgueira, D., Holmen, S., Melbø, J. K., Moldes, D., Echtermeyer, A. T. & Chinga-Carrasco, G. (2017). Enzymatic-Assisted Modification of Thermomechanical Pulp Fibers to Improve the Interfacial Adhesion with Poly(lactic acid) for 3D Printing. ACS Sustainable Chemistry and Engineering, 5(10), 9338-9346
Open this publication in new window or tab >>Enzymatic-Assisted Modification of Thermomechanical Pulp Fibers to Improve the Interfacial Adhesion with Poly(lactic acid) for 3D Printing
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2017 (English)In: ACS Sustainable Chemistry and Engineering, ISSN 2168-0485, Vol. 5, no 10, p. 9338-9346Article in journal (Refereed) Published
Abstract [en]

The present study is about the enzymatic modification of thermomechanical pulp (TMP) fibers for reduction of water uptake and their use in bio-based filaments for 3D printing. Additionally, TMP was used as a fiber reinforcing material and poly(lactic acid) (PLA) as the polymer matrix. The hydrophilic TMP fibers were treated via laccase-assisted grafting of octyl gallate (OG) or lauryl gallate (LG) onto the fiber surface. The modified TMP fibers showed remarkable hydrophobic properties, as demonstrated by water contact angle measurements. Filaments reinforced with OG-treated fibers exhibited the lowest water absorption and the best interfacial adhesion with the PLA matrix. Such higher chemical compatibility between the OG-treated fibers and the PLA enabled better stress transfer from the matrix to the fibers during mechanical testing, which led to the manufacture of strong filaments for 3D printing. All of the manufactured filaments were 3D-printable, although the filaments containing OG-treated fibers yielded the best results. Hence, laccase-mediated grafting of OG onto TMP fibers is a sustainable and environmentally friendly pathway for the manufacture of fully bio-based filaments for 3D printing.

Keywords
3D printing, Biocomposites, Grafting, Laccase, Octyl gallate, PLA, TMP, Adhesion, Enzymes, Fibers, Grafting (chemical), Interfaces (materials), Lactic acid, Manufacture, Mechanical testing, Printing, Reinforced plastics, Reinforcement, Thermomechanical pulp, Thermomechanical pulping process, Water absorption, 3-D printing, Bio-composites, Chemical compatibility, Enzymatic modification, Hydrophobic properties, Laccases, Water contact angle measurement, 3D printers
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-32424 (URN)10.1021/acssuschemeng.7b02351 (DOI)2-s2.0-85030456430 (Scopus ID)
Note

 Funding details: COST, European Cooperation in Science and Technology

Available from: 2017-10-31 Created: 2017-10-31 Last updated: 2018-08-14Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6183-2017

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