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Alimohammadzadeh, Rana
Publications (6 of 6) Show all publications
Cordova, A., Afewerki, S., Alimohammadzadeh, R., Sanhueza, I., Tai, C.-W., Osong, S. H., . . . Ibrahem, I. (2019). A sustainable strategy for production and functionalization of nanocelluloses. Pure and Applied Chemistry, 91(5), 865-874
Open this publication in new window or tab >>A sustainable strategy for production and functionalization of nanocelluloses
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2019 (English)In: Pure and Applied Chemistry, ISSN 0033-4545, E-ISSN 1365-3075, Vol. 91, no 5, p. 865-874Article in journal (Refereed) Published
Abstract [en]

A sustainable strategy for the neat production and surface functionalization of nanocellulose from wood pulp is disclosed. It is based on the combination of organocatalysis and click chemistry ("organoclick" chemistry) and starts with nanocellulose production by organic acid catalyzed hydrolysis and esterification of the pulp under neat conditions followed by homogenization. This nanocellulose fabrication route is scalable, reduces energy consumption and the organic acid can be efficiently recycled. Next, the surface is catalytically engineered by "organoclick" chemistry, which allows for selective and versatile attachment of different organic molecules (e.g. fluorescent probes, catalyst and pharmaceuticals). It also enables binding of metal ions and nanoparticles. This was exemplified by the fabrication of a heterogeneous nanocellulose-palladium nanoparticle catalyst, which is used for Suzuki cross-coupling transformations in water. The disclosed surface functionalization methodology is broad in scope and applicable to different nanocelluloses and cellulose based materials as well.

Keywords
click chemistry, cross-coupling reaction, heterogeneous catalysis, nanocellulose, NICE-2016, organocatalysis, surface engineering
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-35142 (URN)10.1515/pac-2018-0204 (DOI)000466859500008 ()2-s2.0-85056591870 (Scopus ID)
Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2019-07-08Bibliographically approved
Alimohammadzadeh, R., Osong, S. H., Abbaszad Rafi, A., Dahlström, C. & Cordova, A. (2019). Cellulosic Materials: Sustainable Surface Engineering of Lignocellulose and Cellulose by Synergistic Combination of Metal-Free Catalysis and Polyelectrolyte Complexes. Global Challenges, 3(7), Article ID 1970071.
Open this publication in new window or tab >>Cellulosic Materials: Sustainable Surface Engineering of Lignocellulose and Cellulose by Synergistic Combination of Metal-Free Catalysis and Polyelectrolyte Complexes
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2019 (English)In: Global Challenges, ISSN 2056-6646, Vol. 3, no 7, article id 1970071Article in journal (Refereed) Published
Abstract [en]

In article number 1900018 by Armando Cordova and co‐workers, the novel combination of metal‐free catalysis and renewable polyelectrolyte complexes leads to synergistic surface engineering of lignocellulose and cellulose fibers derived from wood. This sustainable strategy allows for improvement and introduction of important properties such as strength (up to 100% in Z‐strength), water resistance, and fluorescence to the renewable fibers and cellulosic materials under eco‐friendly conditions.

National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-37903 (URN)10.1002/gch2.201970071 (DOI)
Available from: 2019-12-06 Created: 2019-12-06 Last updated: 2019-12-06Bibliographically approved
Alimohammadzadeh, R., Osong, S. H., Dahlström, C. & Cordova, A. (2018). Scalable Improvement of the Strength Properties of Chemimechanical Pulp Fibers by Eco-Friendly Catalysis. In: IMPC 2018: . Paper presented at International Mechanical Pulping Conference (IMPC) 2018, May 27-30, 2018, Trondheim, Norway. Trondheim, Norway
Open this publication in new window or tab >>Scalable Improvement of the Strength Properties of Chemimechanical Pulp Fibers by Eco-Friendly Catalysis
2018 (English)In: IMPC 2018, Trondheim, Norway, 2018Conference paper, Published paper (Refereed)
Abstract [en]

The sustainable improvement of the strength properties of chemimechanical pulp by eco-friendlycatalysis is disclosed. Significant research activities have been performed on the use of cationic starchand polyelectrolyte complexes for improving the strength properties of cellulose-based materials. Herewe apply an eco-friendly strategy based on catalysis for significantly improving the strength propertiesof sheets made from chemimechanical pulp (CTMP) and bleeched sulphite pulp (BSP) using sustainablepolyelectrolyte complexes as the strength additives and organocatalysis. This surface engineeringstrategy significantly increased the strength properties of the assembled sheets (up to 100% in the caseof Z-strength). We also developed a catalytic selective colour marking of the cationic potato starch (CS)and carboxymethylcellulose (CMC) in order to elucidated how the specific strength additives aredistributed on the sheets. It revealed that the strength additives were more evenly distributed on thesheets made from CTMP as compared to BSP sheets. This is most likely attributed to the presence oflignin in the former lignocellulosic material. It also contributes to the increase in strength (up to 100%,Z-strength) for the CTMP derived sheets. The selective colour marking method also revealed that morestrength additives had been bound to the pulps in the presence of the catalyst.

Place, publisher, year, edition, pages
Trondheim, Norway: , 2018
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:miun:diva-34682 (URN)
Conference
International Mechanical Pulping Conference (IMPC) 2018, May 27-30, 2018, Trondheim, Norway
Available from: 2018-10-08 Created: 2018-10-08 Last updated: 2018-10-08Bibliographically approved
Afewerki, S., Alimohammadzadeh, R., Osong, S. H., Tai, C.-W., Engstrand, P. & Cordova, A. (2017). Sustainable Design for the Direct Fabrication and Highly Versatile Functionalization of Nanocelluloses. Global Challenges, 1(7), Article ID 1700045.
Open this publication in new window or tab >>Sustainable Design for the Direct Fabrication and Highly Versatile Functionalization of Nanocelluloses
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2017 (English)In: Global Challenges, ISSN 2056-6646, Vol. 1, no 7, article id 1700045Article in journal (Refereed) Published
Abstract [en]

This study describes a novel sustainable concept for the scalable direct fabrication and functionalization of nanocellulose from wood pulp with reduced energy consumption. A central concept is the use of metal-free small organic molecules as mediators and catalysts for the production and subsequent versatile surface engineering of the cellulosic nanomaterials via organocatalysis and click chemistry. Here, “organoclick” chemistry enables the selective functionalization of nanocelluloses with different organic molecules as well as the binding of palladium ions or nanoparticles. The nanocellulosic material is also shown to function as a sustainable support for heterogeneous catalysis in modern organic synthesis (e.g., Suzuki cross-coupling transformations in water). The reported strategy not only addresses obstacles and challenges for the future utilization of nanocellulose (e.g., low moisture resistance, the need for green chemistry, and energy-intensive production) but also enables new applications for nanocellulosic materials in different areas.

Place, publisher, year, edition, pages
Weinheim: Wiley-VCH Verlagsgesellschaft, 2017
Keywords
nanocellulose
National Category
Natural Sciences Engineering and Technology
Identifiers
urn:nbn:se:miun:diva-32620 (URN)10.1002/gch2.201700045 (DOI)000419793400002 ()
Funder
Swedish Research Council
Available from: 2017-12-24 Created: 2017-12-24 Last updated: 2018-03-23Bibliographically approved
Osong, S. H., Norgren, S., Pettersson, G., Engstrand, P., Còrdova, A., Afewerki, S. & Alimohammadzadeh, R. (2016). Processing of nanocellulose and applications relating to CTMP-based paperboard and foams. In: International Mechanical Pulping Conference 2016, IMPC 2016: . Paper presented at International Mechanical Pulping Conference 2016, IMPC 2016; Jacksonville; United States; 26 September 2016 through 28 September 2016 (pp. 87-93). TAPPI Press
Open this publication in new window or tab >>Processing of nanocellulose and applications relating to CTMP-based paperboard and foams
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2016 (English)In: International Mechanical Pulping Conference 2016, IMPC 2016, TAPPI Press, 2016, p. 87-93Conference paper, Published paper (Refereed)
Abstract [en]

Although remarkable success has been made in the production of nanocellulose through several processing methods, it still remain a challenge to reduce the overall energy consumption, to use green chemistry and sustainable approach in order to make it feasible for industrial production of this novel nanomaterial. Herein, we have developed a new eco-friendly and sustainable approach to produce nanocellulose using organic acid combined with high-shear homogenisation, made hydrophobisation of nanocellulose and cross-linked the modified nanocellulosic material. Also, TEMPO-mediated oxidised nanocellulose was produced in order to compare the processing route with that of mild organic acid hydrolysis. Freeze-dried 3D structure of TEMPO-derived nanocellulose foam materials made fi-om bleached sulphite pulp and CTMP, respectively. Further, there is growing interest in using nanocellulose or microfibrillated cellulose (MFC) as an alternative paper sfrength additive in papermaking, and in using chemi-thermomechanical pulp (CTMP) with high freeness in producing CTMP-based paperboard with high bulk properties. To achieve greater strength improvement results, particularly for packaging paperboards, different proportions of cationic starch (CS) or MFC can be used to significantly improve the z-strength, with only a slight increase in sheet density. Research in this area is exploring CS or MFC as potential strength additives in CTMP-based paperboard, which is interesting from an industrial perspective. The mean grammage of the CTMP handsheets produced was approximately 150 g m~, and it was found that blending CTMP with CS or MFC yielded handsheets with significantly improved z-strength, tensile index, burst index and other strength properties at similar sheet densities.

Place, publisher, year, edition, pages
TAPPI Press, 2016
Keywords
Cationic starch, Chemi-thermomechanical pulp, Microfibrillated cellulose, Paperboard, Strength additive, TEMPO
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-29834 (URN)2-s2.0-85006448740 (Scopus ID)978-151083073-8 (ISBN)
Conference
International Mechanical Pulping Conference 2016, IMPC 2016; Jacksonville; United States; 26 September 2016 through 28 September 2016
Note

Funding details: Mid Sweden University

Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2017-01-09Bibliographically approved
Afewerki, S., Alimohammadzadeh, R., Henshaw Osong, S., Tai, C.-W., Engstrand, P. & Córdova, A.Eco-friendly design for scalable direct fabrication of nanocellulose.
Open this publication in new window or tab >>Eco-friendly design for scalable direct fabrication of nanocellulose
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(English)Manuscript (preprint) (Other academic)
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-30360 (URN)
Available from: 2017-02-28 Created: 2017-02-28 Last updated: 2017-02-28Bibliographically approved
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