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Fernandes, Susana C. M.ORCID iD iconorcid.org/0000-0002-1295-5010
Publications (3 of 3) Show all publications
Fernandes, S. C. M. & Bulone, V. (2017). UV-absorbing materials based on natural molecular sunscreens and chitosan. Paper presented at 253rd National Meeting of the American-Chemical-Society (ACS) on Advanced Materials, Technologies, Systems, and Processes, APR 02-06, 2017, San Francisco, CA. Abstract of Papers of the American Chemical Society, 253
Open this publication in new window or tab >>UV-absorbing materials based on natural molecular sunscreens and chitosan
2017 (English)In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 253Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-243601 (URN)000430568503361 ()
Conference
253rd National Meeting of the American-Chemical-Society (ACS) on Advanced Materials, Technologies, Systems, and Processes, APR 02-06, 2017, San Francisco, CA
Note

QC 20190206

Available from: 2019-02-06 Created: 2019-02-06 Last updated: 2019-02-06Bibliographically approved
Robles, E., Salaberria, A. M., Herrera, R., Fernandes, S. C. M. & Labidi, J. (2016). Self-bonded composite films based on cellulose nanofibers and chitin nanocrystals as antifungal materials. Carbohydrate Polymers, 144, 41-49
Open this publication in new window or tab >>Self-bonded composite films based on cellulose nanofibers and chitin nanocrystals as antifungal materials
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2016 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 144, p. 41-49Article in journal (Refereed) Published
Abstract [en]

Cellulose nanofibers and chitin nanocrystals, two main components of agricultural and aquacultural by-products, were obtained from blue agave and yellow squat lobster industrial residues. Cellulose nanofibers were obtained using high pressure homogenization, while chitin nanocrystals were obtained by hydrolysis in acid medium. Cellulose nanofibers and chitin nanocrystals were characterized by X-ray diffraction, Atomic Force Microscopy and Infrared spectroscopy. Self-bonded composite films with different composition were fabricated by hot pressing and their properties were evaluated. Antifungal activity of chitin nanocrystals was studied using a Cellometer®cell count device, mechanical properties at tension were measured with a universal testing machine, water vapor permeability was evaluated with a thermohygrometer and surface tension with sessile drop contact angle method. The addition of chitin nanocrystals reduced slightly the mechanical properties of the composite. Presence of chitin nanocrystals influenced the growth of Aspergillus sp fungus in the surface of the composites as expected.

Place, publisher, year, edition, pages
Elsevier, 2016
Keywords
Antifungal properties, Blue agave, Cellulose, Chitin, Nanocrystals, Yellow squat lobster, Agricultural machinery, Atomic force microscopy, Cellulose films, Composite films, Films, Fungi, Hot pressing, Infrared spectroscopy, Mechanical permeability, Mechanical properties, Nanofibers, Shellfish, X ray diffraction, Anti-fungal properties, Cellulose nanofibers, Contact angle method, High pressure homogenization, Universal testing machines, Water vapor permeability, Nanocomposite films, Cellulose Derivatives, Contact Angle, Homogenization, Hydrolysis, Surface Tension, Thin Films
National Category
Polymer Chemistry Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-186927 (URN)10.1016/j.carbpol.2016.02.024 (DOI)000373830700006 ()2-s2.0-84961653872 (Scopus ID)
Note

QC 20160524

Available from: 2016-05-24 Created: 2016-05-16 Last updated: 2017-11-30Bibliographically approved
Fernandes, S. C. M., Alonso-Varona, A., Palomares, T., Zubillaga, V., Labidi, J. & Bulone, V. (2015). Exploiting Mycosporines as Natural Molecular Sunscreens for the Fabrication of UV-Absorbing Green Materials. ACS Applied Materials and Interfaces, 7(30), 16558-16564
Open this publication in new window or tab >>Exploiting Mycosporines as Natural Molecular Sunscreens for the Fabrication of UV-Absorbing Green Materials
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2015 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 7, no 30, p. 16558-16564Article in journal (Refereed) Published
Abstract [en]

Ultraviolet radiations have many detrimental effects in living organisms that challenge the stability and function of cellular structures. UV exposure also alters the properties and durability of materials and affects their lifetime. It is becoming increasingly important to develop new biocompatible and environmentally friendly materials to address these issues. Inspired by the strategy developed by fish, algae, and microorganisms exposed to UV radiations in confined ecosystems, we have constructed novel UV-protective materials that exclusively consist of natural compounds. Chitosan was chosen as the matrix for grafting mycosporines and mycosporine-like amino acids as the functional components of the active materials. Here, we show that these materials are biocompatible, photoresistant, and thermoresistant, and exhibit a highly efficient absorption of both UV-A and UV-B radiations. Thus, they have the potential to provide an efficient protection against both types of UV radiations and overcome several shortfalls of the current UV-protective products. In practice, the same concept can be applied to other biopolymers than chitosan and used to produce multifunctional materials. Therefore, it has a great potential to be exploited in a broad range of applications in living organisms and nonliving systems.

Keywords
mycosporine, natural sunscreen, chitosan, ultraviolet-absorbing material, biocompatibility
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-173270 (URN)10.1021/acsami.5b04064 (DOI)000359279800051 ()26168193 (PubMedID)2-s2.0-84938633730 (Scopus ID)
Note

QC 20150909

Available from: 2015-09-09 Created: 2015-09-09 Last updated: 2017-12-04Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1295-5010

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