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1. Certain Properties of Cotton Paper with the Addition of Nanofibers in the Form of PLA/PHB Composite.

Author

Modzelewska, Izabela, Patelski, Emil, and Tyrolczyk, Emil

Subjects
*COTTON paper, *POLYLACTIC acid, *NANOFIBERS, *POLYHYDROXYBUTYRATE, *RESEARCH
Abstract

The purpose of the research was to produce nanofiber-modified paper with enhanced strength. The materials used in the research were cotton-comber pulp and a composite of PLA (polylactic acid) and PHB (polyhydroxybutyrate) nanofibers. Two sets of test sheets were formed: from the pure cotton-comber pulp and from the cotton-comber pulp with 5.5% of ground nanofibers. A range of strength tests showed a significant strength improvement (an increase in breaking length of 17%). The thesis was confirmed and the results encourage further research into the subject matter of this article. [ABSTRACT FROM PUBLISHER]

Published
2015
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2. Modification of paper using polyhydroxybutyrate to obtain biomimetic superhydrophobic substrates

Author

Obeso, Constancio G., Sousa, Maria P., Song, Wenlong, Rodriguez-Pérez, Miguel Angel, Bhushan, Bharat, and Mano, João F.

Subjects
*POLYHYDROXYBUTYRATE, *BIOMIMETIC chemicals, *SUBSTRATES (Materials science), *SURFACE chemistry, *PHASE separation method (Engineering), *CONTACT angle, *PAPER, *HYDROPHOBIC compounds
Abstract

Abstract: Inspired in nature, the creation of synthetic superhydrophobic surfaces is nowadays a major object of study, with many potential applications in different fields. The fabrication of such substrates has been dominated by the use of non biodegradable and poorly flexible materials, using expensive and complex procedures. To overcome this issue, we propose a simple concept for fabricating low-cost, biodegradable, and flexible biomimetic superhydrophobic materials, using paper as substrate. The methodology includes the precipitation of poly(hydroxybutyrate) (PHB) on the surface of cellulose fibers of papers using a phase separation process. The obtained surfaces showed a rough texture, at both micro and nano length scales and an apparent water contact angle of 153.0±0.7°. Furthermore we showed that argon plasma treatment increases the surface wettability and it is possible to control the wettability in certain regions by using adequate hollowed masks. Such findings could be used for the production of cheap open-microfluidic or lab-on-chip devices, using materials from renewable resources. [Copyright &y& Elsevier]

Published
2013
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3. Efficacy of Cinnamaldehyde Against Enteric Viruses and Its Activity After Incorporation Into Biodegradable Multilayer Systems of Interest in Food Packaging

Author

J.L. Castro-Mayorga, Rosa Aznar, Jose M. Lagaron, María José Fabra, Gloria Sánchez, Walter Randazzo, Amparo López-Rubio, Ministerio de Economía y Competitividad (España), Colciencias (Colombia), and European Commission

Subjects
Paper, 0301 basic medicine, Epidemiology, Health, Toxicology and Mutagenesis, Enteric viruses, 030106 microbiology, ved/biology.organism_classification_rank.species, Active packaging, Food Contamination, Multilayer structures, medicine.disease_cause, Cinnamaldehyde, Microbiology, Incubation period, Polyhydroxybutyrate, Mice, 03 medical and health sciences, chemistry.chemical_compound, Virology, Prohibitins, medicine, Animals, Humans, Food science, Acrolein, Feline calicivirus, biology, ved/biology, Chemistry, Norovirus, Food Packaging, biology.organism_classification, Food packaging, Cats, Virus Inactivation, Hepatitis A virus, Calicivirus, Feline, Disinfectants, Food Science, Murine norovirus
Abstract

Cinnamaldehyde (CNMA), an organic compound that gives cinnamon its flavor and odor, was investigated for its virucidal activity on norovirus surrogates, murine norovirus (MNV) and feline calicivirus (FCV), and hepatitis A virus (HAV). Initially, different concentrations of CNMA (0.1, 0.5 and 1 %) were individually mixed with each virus at titers of ca. 6–7 log10 TCID50/ml and incubated 2 h at 4 and 37 °C. CNMA was effective in reducing the titers of norovirus surrogates in a dose-dependent manner after 2 h at 37 °C, while HAV titers were reduced by 1 log10 after treatment with 1 % of CNMA. When incubation time was extended, HAV titers were reduced by 3.4 and 2.7 log10 after overnight incubation at 37 °C with 1 and 0.5 % of CNMA, respectively. Moreover, this paper analyzed, for the first time, the antiviral activity of adding an active electrospun interlayer based on zein and CNMA to a polyhydroxybutyrate packaging material (PHB) in a multilayer form. Biodegradable multilayer systems prepared with 2.60 mg/cm2 (~9.7 %) of CNMA completely inactivated FCV according to ISO 22196:2011, while MNV titers were reduced by 2.75 log10. When the developed multilayer films were evaluated after one month of preparation or at 25 °C, the antiviral activity was reduced as compared to freshly prepared multilayer films evaluated at 37 °C. The results show the excellent potential of this system for food contact applications as well as for active packaging technologies in order to maintain or extend food quality and safety., This work was supported by the Spanish Ministry of Economy and Competitiveness (MINECO) (RYC-2012-09950, AGL2015-63855-C2-1 and INIA Grant RTA2014-00024-C04-03). GS was supported by the “Ramón y Cajal” Young Investigator and MJF was recipient of a Juan de la Cierva contract from the MINECO. JLC-M was supported by the Departamento Administrativo de Ciencia, Tecnología e Innovación (Colciencias) of Colombian Government and WR by the “Student Mobility for Placement e SMP” Grant of the EU Life Learning Program.

Published
2016