Change search
Link to record
Permanent link

Direct link
Mensah, Rhoda AfriyieORCID iD iconorcid.org/0000-0003-4720-5380
Publications (10 of 29) Show all publications
Panahi, P., Khorasani, S. N., Mensah, R. A., Das, O. & Neisiany, R. E. (2024). A review of the characterization methods for self-healing assessment in polymeric coatings. Progress in organic coatings, 186, Article ID 108055.
Open this publication in new window or tab >>A review of the characterization methods for self-healing assessment in polymeric coatings
Show others...
2024 (English)In: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 186, article id 108055Article, review/survey (Refereed) Published
Place, publisher, year, edition, pages
Elsevier, 2024
National Category
Software Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-102438 (URN)10.1016/j.porgcoat.2023.108055 (DOI)001108295600001 ()2-s2.0-85175543977 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-11-15 (hanlid)

Available from: 2023-11-13 Created: 2023-11-13 Last updated: 2024-03-07Bibliographically approved
Gawusu, S., Tando, M. S., Ahmed, A., Jamatutu, S. A., Mensah, R. A., Das, O., . . . Ackah, I. (2024). Decentralized energy systems and blockchain technology: Implications for alleviating energy poverty. Sustainable Energy Technologies and Assessments, 65, Article ID 103795.
Open this publication in new window or tab >>Decentralized energy systems and blockchain technology: Implications for alleviating energy poverty
Show others...
2024 (English)In: Sustainable Energy Technologies and Assessments, ISSN 2213-1388, E-ISSN 2213-1396, Vol. 65, article id 103795Article, review/survey (Refereed) Published
Place, publisher, year, edition, pages
Elsevier Ltd, 2024
National Category
Energy Systems
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-105404 (URN)10.1016/j.seta.2024.103795 (DOI)2-s2.0-85191295599 (Scopus ID)
Note

Validerad;2024;Nivå 2;2024-05-13 (hanlid)

Available from: 2024-05-13 Created: 2024-05-13 Last updated: 2024-05-13Bibliographically approved
Birdsong, B. K., Wu, Q., Hedenqvist, M. S., Capezza, A. J., Andersson, R. L., Svagan, A. J., . . . Olsson, R. T. (2024). Flexible and fire-retardant silica/cellulose aerogel using bacterial cellulose nanofibrils as template material. Materials Advances
Open this publication in new window or tab >>Flexible and fire-retardant silica/cellulose aerogel using bacterial cellulose nanofibrils as template material
Show others...
2024 (English)In: Materials Advances, E-ISSN 2633-5409Article in journal (Refereed) Epub ahead of print
Abstract [en]

This study explores the possibility of using various silsesquioxane precursors such as (3-aminopropyl) triethoxysilane (APTES), methyltrimethoxysilane (MTMS), and tetraethyl orthosilicate (TEOS) to produce silsesquioxane-bacterial cellulose nanofibre (bCNF) aerogels. Each precursor allowed to customize the aerogel properties, leading to unique properties suitable for various applications requiring lightweight insulative materials. When utilizing APTES as the silsesquioxane precursor, an aerogel capable of over 90% recovery after compression was formed, making them suitable for flexible applications. When MTMS was used as the precursor, the aerogel retained some compression recovery (80%) but had the added property of superhydrophobicity with a contact angle over 160° due to the presence of CH3 functional groups, enabling water-repellence. Finally, TEOS allowed for excellent thermal insulative properties with a low Peak Heat Release Rate (PHRR), making it a promising candidate for fire-resistant applications. The customization of these aerogel materials was attributed to a combination of the chemical composition of the silsesquioxane precursors and the morphology of the coated bacterial cellulose nanofibres (bCNF), such as CH3 groups found in MTMS enabled for superhydrophobicity. Differences in morphology, such as uniform and smooth silsesquioxane coatings when using APTES or a “pearl-necklace” morphology using TEOS, enabled either compression recovery and flexibility or low thermal conduction. This investigation of silsesquioxane-bCNF provides a good understanding of the importance of the choice of precursor effect on insulating aerogel properties.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2024
National Category
Materials Chemistry
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-104509 (URN)10.1039/d3ma01090b (DOI)2-s2.0-85185472680 (Scopus ID)
Note

Funder: Swedish Research Council (VR 2019-05650);

Full text license: CC BY

Available from: 2024-03-07 Created: 2024-03-07 Last updated: 2024-03-07
Gao, Z., Cai, J., Jiang, L., Mensah, R. A. & Fan, C. (2024). Investigation on the natural smoke exhaust performance by vertical shaft in tunnel fires under different ambient pressures. Indoor + Built Environment
Open this publication in new window or tab >>Investigation on the natural smoke exhaust performance by vertical shaft in tunnel fires under different ambient pressures
Show others...
2024 (English)In: Indoor + Built Environment, ISSN 1420-326X, E-ISSN 1423-0070Article in journal (Refereed) Epub ahead of print
Place, publisher, year, edition, pages
Sage Publications, 2024
National Category
Other Civil Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-105211 (URN)10.1177/1420326X241242728 (DOI)2-s2.0-85190457429 (Scopus ID)
Note

Funder: National Natural Science Foundation of China (52076198); Excellent Youth Foundation of Henan Scientific Committee (222300420078); Science and Technology Program of Hunan Provincial Department of Transportation (202122); Key Research and Development Program of Hunan Province (2022SK2093); National Supercomputing Center in Zhengzhou

Available from: 2024-05-02 Created: 2024-05-02 Last updated: 2024-05-02
Raja, P., Murugan, V., Ravichandran, S., Behera, L., Mensah, R. A., Mani, S., . . . Das, O. (2023). A Review of Sustainable Bio-Based Insulation Materials for Energy-Efficient Buildings. Macromolecular materials and engineering, 308(10), Article ID 2300086.
Open this publication in new window or tab >>A Review of Sustainable Bio-Based Insulation Materials for Energy-Efficient Buildings
Show others...
2023 (English)In: Macromolecular materials and engineering, ISSN 1438-7492, E-ISSN 1439-2054, Vol. 308, no 10, article id 2300086Article, review/survey (Refereed) Published
Abstract [en]

The surge towards a sustainable future in the construction industry requires the use of bio-based insulation materials as an alternative to conventional ones for improving energy efficiency in structures. In this article, the features of bio-based insulation materials, including their thermal conductivities, moisture buffering value, fire performance, and life cycle evaluations are examined. It is clear from the review that pre- and post-treatment of the bio-based materials used for insulation materials optimize their properties. The life cycle analysis reveals a significant reduction in global warming potential (GWP) compared to conventional foams. In addition, it is envisaged that producing bio-based insulation materials on a larger scale will further decrease the net GWP. The article, therefore, proposes the implementation of policies that will promote the commercialization of bio-based insulation materials.

Place, publisher, year, edition, pages
John Wiley and Sons Inc, 2023
Keywords
construction, degradable materials, fire reactions, insulation, renewable sources
National Category
Energy Systems Wood Science
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-97967 (URN)10.1002/mame.202300086 (DOI)000995935600001 ()2-s2.0-85160288253 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-11-01 (joosat);

Licens fulltext: CC BY License

Available from: 2023-06-07 Created: 2023-06-07 Last updated: 2024-01-17Bibliographically approved
Das, O., Mensah, R. A., Balasubramanian, K. B., Shanmugam, V., Försth, M., Hedenqvist, M. S., . . . Misra, M. (2023). Functionalised biochar in biocomposites: The effect of fire retardants, bioplastics and processing methods. Composites Part C: Open Access, 11, Article ID 100368.
Open this publication in new window or tab >>Functionalised biochar in biocomposites: The effect of fire retardants, bioplastics and processing methods
Show others...
2023 (English)In: Composites Part C: Open Access, E-ISSN 2666-6820, Vol. 11, article id 100368Article in journal (Refereed) Published
Abstract [en]

Fire retardants, although can impart fire-safety in polymeric composites, are detrimental to the mechanical properties. Biochar can be used, in conjunction with fire retardants, to create a balance between fire-safety and mechanical performance. It is possible to thermally dope fire retardants into the pores of biochar to make it functionalised. Thus, the current work is intended in identifying a composite having the combination of the most desirable fire retardant, bioplastic, and a suitable processing method. A comparison was made between two fire retardants (lanosol and ammonium polyphosphate), bioplastics (wheat gluten and polyamide 11), and composite processing methods (compression and injection moulding). It was found that wheat gluten containing ammonium polyphosphate-doped biochar made by compression moulding had the best fire-safety properties with the lowest peak heat release rate (186 kW/m2), the highest fire performance index (0.6 m2s/kW), and the lowest fire growth index (1.6 kW/ms) with acceptable mechanical properties compared to the corresponding neat bioplastic. Thus, for gluten-based polymers, the use of ammonium polyphosphate thermally doped into biochar processed by compression moulding is recommended to both simultaneously improve fire-safety and conserve the mechanical strength of the resulting biocomposites.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Biochar, Bioplastics, Compression moulding, Fire retardants, Injection moulding
National Category
Materials Chemistry Paper, Pulp and Fiber Technology
Research subject
Structural Engineering; Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-98229 (URN)10.1016/j.jcomc.2023.100368 (DOI)001016720900001 ()2-s2.0-85160716623 (Scopus ID)
Funder
Brandforsk, 321–002
Note

Validerad;2023;Nivå 2;2023-06-13 (hanlid)

Available from: 2023-06-13 Created: 2023-06-13 Last updated: 2024-03-07Bibliographically approved
Lin, C.-F., Karlsson, O., Das, O., Mensah, R. A., Mantanis, G. I., Jones, D., . . . Sandberg, D. (2023). High Leach-Resistant Fire-Retardant Modified Pine Wood (Pinus sylvestris L.) by In Situ Phosphorylation and Carbamylation. ACS Omega, 8(12), 11381-11396
Open this publication in new window or tab >>High Leach-Resistant Fire-Retardant Modified Pine Wood (Pinus sylvestris L.) by In Situ Phosphorylation and Carbamylation
Show others...
2023 (English)In: ACS Omega, E-ISSN 2470-1343, Vol. 8, no 12, p. 11381-11396Article in journal (Refereed) Published
Abstract [en]

The exterior application of fire-retardant (FR) timber necessitates it to have high durability because of the possibility to be exposed to rainfall. In this study, water-leaching resistance of FR wood has been imparted by grafting phosphate and carbamate groups of the water-soluble FR additives ammonium dihydrogen phosphate (ADP)/urea onto the hydroxyl groups of wood polymers via vacuum-pressure impregnation, followed by drying/heating in hot air. A darker and more reddish wood surface was observed after the modification. Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, solid-state 13C cross-polarization magic-angle-spinning nuclear magnetic resonance (13C CP-MAS NMR), and direct-excitation 31P MAS NMR suggested the formation of C–O–P covalent bonds and urethane chemical bridges. Scanning electron microscopy/energy-dispersive X-ray spectrometry suggested the diffusion of ADP/urea into the cell wall. The gas evolution analyzed by thermogravimetric analysis coupled with quadrupole mass spectrometry revealed a potential grafting reaction mechanism starting with the thermal decomposition of urea. Thermal behavior showed that the FR-modified wood lowered the main decomposition temperature and promoted the formation of char residues at elevated temperatures. The FR activity was preserved even after an extensive water-leaching test, confirmed by the limiting oxygen index (LOI) and cone calorimetry. The reduction of fire hazards was achieved through the increase of the LOI to above 80%, reduction of 30% of the peak heat release rate (pHRR2), reduction of smoke production, and a longer ignition time. The modulus of elasticity of FR-modified wood increased by 40% without significantly decreasing the modulus of rupture.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2023
National Category
Wood Science Physical Chemistry
Research subject
Wood Science and Engineering; Structural Engineering; Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-95881 (URN)10.1021/acsomega.3c00146 (DOI)000960080200001 ()37008136 (PubMedID)2-s2.0-85150425157 (Scopus ID)
Funder
Swedish Research Council Formas, 2021-00818
Note

Validerad;2023;Nivå 2;2023-04-21 (joosat);

Funder: OP RDE (Grant no.CZ.02.1.01/0.0/0.0/16_019/0000803); CT WOOD, Luleå University of Technology

Licens fulltext: CC BY License

Available from: 2023-03-15 Created: 2023-03-15 Last updated: 2023-09-22Bibliographically approved
Vijaybabu, T. R., Ramesh, T., Pandipati, S., Mishra, S., Sridevi, G., Raja, C. P., . . . Karthik Babu, N. B. (2023). High Thermal Conductivity Polymer Composites Fabrication through Conventional and 3D Printing Processes: State-of-the-Art and Future Trends. Macromolecular materials and engineering, 308(7), Article ID 2300001.
Open this publication in new window or tab >>High Thermal Conductivity Polymer Composites Fabrication through Conventional and 3D Printing Processes: State-of-the-Art and Future Trends
Show others...
2023 (English)In: Macromolecular materials and engineering, ISSN 1438-7492, E-ISSN 1439-2054, Vol. 308, no 7, article id 2300001Article, review/survey (Refereed) Published
Abstract [en]

The lifespan and the performance of flexible electronic devices and components are affected by the large accumulation of heat, and this problem must be addressed by thermally conductive polymer composite films. Therefore, the need for the development of high thermal conductivity nanocomposites has a strong role in various applications. In this article, the effect of different particle reinforcements such as single and hybrid form, coated and uncoated particles, and chemically treated particles on the thermal conductivity of various polymers are reviewed and the mechanism behind the improvement of the required properties are discussed. Furthermore, the role of manufacturing processes such as injection molding, compression molding, and 3D printing techniques in the production of high thermal conductivity polymer composites is detailed. Finally, the potential for future research is discussed, which can help researchers to work on the thermal properties enhancement for polymeric materials.

Place, publisher, year, edition, pages
John Wiley & Sons, 2023
Keywords
additive manufacturing, conductivity networks, heat transfer, polymer composites, thermal conductivity
National Category
Textile, Rubber and Polymeric Materials Composite Science and Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-97074 (URN)10.1002/mame.202300001 (DOI)000971814100001 ()2-s2.0-85152920656 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-08-15 (marisr);

License fulltext: CC-BY. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Available from: 2023-05-10 Created: 2023-05-10 Last updated: 2024-01-17Bibliographically approved
Zhao, S.-N., Han, Z.-X., Li, M., Liu, H., Mensah, R. A., Das, O. & Jiang, L. (2023). Insights into thermochemistry, kinetics, and pyrolysis behavior of green gas generator 5- aminotetrazole by experiment and theoretical methods. Case Studies in Thermal Engineering, 49, Article ID 103217.
Open this publication in new window or tab >>Insights into thermochemistry, kinetics, and pyrolysis behavior of green gas generator 5- aminotetrazole by experiment and theoretical methods
Show others...
2023 (English)In: Case Studies in Thermal Engineering, ISSN 2214-157X, Vol. 49, article id 103217Article in journal (Refereed) Published
Abstract [en]

Green gas generator 5-aminotetrazole(5-AT) has been widely used as a kind of energetic material with excellent properties, and it is crucial to understand its pyrolysis process and mechanism. The present study comprehensively investigated the thermochemistry, kinetics, and pyrolysis mechanism of green gas generator 5-AT, using a combination of experimental analysis and theoretical calculation. Thermogravimetric analysis (TGA) and fourier transform infrared spectroscopy (FTIR) were used to investigate the pyrolysis behavior of 5AT and energy barriers of transition states for different pyrolysis paths of three isomers of 5AT were also calculated at a high and reliable level of theory CCSD(T)/cc-pvtz. The results showed that the pyrolysis of 5-AT had five reaction stages and kinetic parameters in each stage were determined by Kissinger method and Criado method. Furthermore, the elimination of N2 from the tetrazole ring occurred before that of HN3, and N2 elimination had lower energy than HN3 elimination for 1-hydrogen-5-aminotetrazole and 2-hydrogen-5-aminotetrazole, but HN3 elimination had lower energy for 5-iminotetrazole. The results of the study provide useful insights into the pyrolysis mechanism and kinetics of 5-AT and could contribute to its efficient utilization in various applications.

Place, publisher, year, edition, pages
Elsevier Ltd, 2023
Keywords
5-Aminotetrazole, Density function theory, Kinetics, Pyrolysis mechanism
National Category
Energy Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-99431 (URN)10.1016/j.csite.2023.103217 (DOI)001044846800001 ()2-s2.0-85164696578 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-08-10 (joosat);

Funder: National Natural Science Foundation of China (NSFC, Grants 52176114 and 52111530091)

Licens fulltext: CC BY License

Available from: 2023-08-10 Created: 2023-08-10 Last updated: 2024-03-07Bibliographically approved
Shankar, A. N., Netravali, A. N., Mensah, R. A. & Das, O. (2023). Microscale combustion calorimetry assessment of green composites made with chicken feather-modified soy protein resins and jute fabric. Composites Part C: Open Access, 12, Article ID 100394.
Open this publication in new window or tab >>Microscale combustion calorimetry assessment of green composites made with chicken feather-modified soy protein resins and jute fabric
2023 (English)In: Composites Part C: Open Access, E-ISSN 2666-6820, Vol. 12, article id 100394Article in journal (Refereed) Published
Abstract [en]

Biodegradable, and sustainably produced, ‘green’ plastics are actively being researched to replace conventional, environmentally harmful petroleum-based plastics. However, before these green plastics get adopted, they must match the properties of their conventional counterparts. In many applications, fire-safety can be a key parameter where naturally derived green materials could potentially outcompete petroleum-based plastics. In the present research, green resins and composites were fabricated using soy protein isolate (SPI), waste chicken feather fibers (CFF), jute fabric (JF), and glutaraldehyde (GA), and evaluated for their critical fire-safety parameters through Microscale Cone Calorimetry (MCC) characterization. The loading of CFF from 0 to 30 wt% increased the specific peak heat release rate (pHRR) from 101 to 120 W/g for CFF/SPI resins without GA and from 94.5 to 114 W/g for GA crosslinked CFF/SPI resins. GA was thus shown to improve fire-safety for CFF/SPI resins. However, for JF/(CFF/SPI) composites, CFF did not show a proportional relationship with fire-safety. Rather, at 20 wt% CFF, the pHRR was minimized to 81.1 W/g for JF/(CFF/SPI) composites without GA and to 86.0 W/g for GA-crosslinked JF/(CFF/SPI) composites. This demonstrated that the addition of JF improved fire-safety despite its known combustibility, and even removed the need of the toxic crosslinker GA. Results also indicated that all variations of the fabricated CFF/SPI resins and JF/(CFF/SPI) composites had lower specific pHRR than typical petroleum-based plastics, clearly demonstrating the benefits of switching to SPI based green resins and composites. These green composites would be suitable for many applications including housing and transportation where fire-safety can be critical.

Place, publisher, year, edition, pages
Elsevier B.V., 2023
Keywords
Agricultural waste, Chicken feather, Composites, Soy protein-based resins, Thermal stability
National Category
Materials Chemistry
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-101363 (URN)10.1016/j.jcomc.2023.100394 (DOI)001077325400001 ()2-s2.0-85170431307 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-09-18 (joosat);

CC BY-NC-ND 4.0 License

Available from: 2023-09-18 Created: 2023-09-18 Last updated: 2024-03-07Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4720-5380

Search in DiVA

Show all publications