1. Eco friendly functional finishes of polyester fabric using keratin from wool and feather wastesLidija Fras Zemljič, Maja Čolnik, Darinka Fakin, Tanja Pušić, Vanessa Wendy Bračko, Tjaša Kraševac Glaser, Mojca Škerget, 2024, izvirni znanstveni članek Opis: This research showcases the use of hydrothermally extracted solutions from poultry feathers and wool as ecofriendly and versatile textile finishes. These solutions, derived from waste biomass containing the keratin
biopolymer, were obtained through environmentally conscious hydrothermal degradation processes. Initially,
the study focused on analysing the chemical parameters and properties of both dialysed and non-dialysed solutions extracted from feathers and wool. The investigation tracked primarily the presence of keratin within these
solutions. Upon application to polyester textiles as the reference material, the presence of these solutions on the
fabric surface was confirmed successfully. A thorough physicochemical analysis of the treated textiles involved
various analytical techniques. These encompassed surface composition analysis via X-ray Photoelectron Spectroscopy (XPS) and Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR), assessment of wettability through Contact Angle measurements, determination of surface charge using surface zeta
potential, and examination of the thermal and flame-retardant properties via Differential Scanning Calorimetry
(DSC), Thermogravimetric Analysis (TGA), and calorimetric tests. In addition, the colour, UV radiation transmission and antioxidant activity were evaluated using standard tests.
The remarkable effects of the treatment have been observed in the exceptional antioxidative action, fire
resistance, UV protection and enhanced hydrophilicity of these innovative multifunctional textiles. This
approach holds significant implications across research, economics and society, enriching Material Science by
deepening the understanding of materials and their multifaceted properties. Moreover, it promotes resource
efficiency, opens new sustainable textile market prospects, and contributes to social impact by supporting
environmental sustainability, engaging communities and ensuring health and safety benefits.
Ključne besede: poultry feathers and wool, hydrothermal extraction, polyester, finishing, green, multifunctionality
Objavljeno v DKUM: 03.09.2024; Ogledov: 43; Prenosov: 13
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2. Kraft lignin/tannin as a potential accelerator of antioxidant and antibacterial properties in an active thermoplastic polyester-based multifunctional materialKlementina Pušnik Črešnar, Alexandra Zamboulis, Dimitrios Bikiaris, Alexandra Aulova, Lidija Fras Zemljič, 2022, izvirni znanstveni članek Opis: This research focuses on key priorities in the field of sustainable plastic composites that will lead to a reduction in CO2 pollution and support the EU’s goal of becoming carbon neutral by 2050. The main challenge is to develop high-performance polyphenol-reinforced thermoplastic composites, where the use of natural fillers replaces the usual chemical additives with non-toxic ones, not only to improve the final performance but also to increase the desired multifunctionalities (structural, antioxidant, and antibacterial). Therefore, poly (lactic acid) (PLA) composites based on Kraft lignin (KL) and tannin (TANN) were investigated. Two series of PLA composites, PLA-KL and PLA-TANN, which contained natural fillers (0.5%, 1.0%, and 2.5% (w/w)) were prepared by hot melt extrusion. The effects of KL and TANN on the PLA matrices were investigated, especially the surface physicochemical properties, mechanical properties, and antioxidant/antimicrobial activity. The surface physicochemical properties were evaluated by measuring the contact angle (CA), roughness, zeta potential, and nanoindentation. The results of the water contact angle showed that neither KL nor TANN caused a significant change in the wettability, but only a slight increase in the hydrophilicity of the PLA composites. The filler loading, the size of the particles with their available functional groups on the surfaces of the PLA composites, and the interaction between the filler and the PLA polymer depend on the roughness and zeta potential behavior of the PLA-KL and PLA-TANN composites and ultimately improve the surface mechanical properties. The antioxidant properties of the PLA-KL and PLA-TANN composites were determined using the DPPH (2,2′-diphenyl-1-picrylhydrazyl) test. The results show an efficient antioxidant behavior of all PLA-KL and PLA-TANN composites, which increases with the filler content. Finally, the KL- and PLA-based TANN have shown resistance to the Gram-negative bacteria, E. coli, but without a correlation trend between polyphenol filler content and structure.
Ključne besede: poly (lactic acid), Kraft lignin, tannin, multifunctionality of PLA composites, surface mechanical properties, antioxidant/antibacterial activity
Objavljeno v DKUM: 18.09.2023; Ogledov: 495; Prenosov: 26
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3. The importance of complementarity in the territorial cohesion and sustainability of rural areas : the case of Cambres, a Duoro winegrowing area, and Magueija, a mountainous areaHelena Pina, 2010, pregledni znanstveni članek Opis: Although the rural world reveals several troubling trends, such as demographic decline and stagnation/deterioration of the economic framework, there are multiple potentialities requiring urgent vitalization. Furthermore, heterogeneity predominates, a fact that becomes very clear when comparing the territorial setting of Cambres, a parish located in the Lamego municipality, part of the Douro winegrowing area and the area classified as World Heritage by UNESCO, with another parish set within mountainous terrain, Magueija, also located in the Lamego municipality, whose endogenous potential is completely neglected. As such, many challenges compromise its development and conformance with one of the main strategic vectors for the region, which is territorial cohesion.
Ključne besede: territorial cohesion, multifunctionality, TRA, complementarity
Objavljeno v DKUM: 29.03.2018; Ogledov: 978; Prenosov: 71
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4. Sustainable rural development - EU agricultural perspectiveAndreja Borec, Jernej Turk, 2009, pregledni znanstveni članek Opis: Rural areas are diverse worldwide but the paradigm of sustainable development and the improving of rural development has become an issue that occupies most of the world’s governments. The global goal is the same everywhere: to improve the well-being of rural people in the broadest possible sense, but the strategies are various and depend on many different factors and sectors.
Throughout history, agriculture has always played a dominant role in the development of rural areas, but today its significance is under discussion in many countries.
The EU’s Common Agricultural Policy (CAP) has shifted from supporting agricultural production to supporting producers' income directly and with the objective of sustainable agriculture. Issues such as environmental sustainability, the viability of rural economies, food quality and animal health and welfare standards have become more prominent.
In this paper, we try to review some key milestones and dates of CAP and to explain the new role for agriculture in rural areas through the concept of multifunctional agriculture.
Multifunctionality is therefore argued as a model to bring post-modern agriculture up to speed with new societal demands. It emphasizes that, in addition to producing food and fiber, agriculture also produces a wide range of non-commodity goods and services, shapes the environment, affects social and cultural systems and contributes to economic growth. Although the concept is rather simple, its translation into policies remains, however controversial (Dobbs and Pretty, 2004) it may be. Thus, the need for further theoretical and empirical research support for deconstructing the multifunctional concept is crucial for sustainable agriculture and rural development in the near future.
Ključne besede: sustainability, development, agriculture, multifunctionality, EU, European Union
Objavljeno v DKUM: 19.03.2018; Ogledov: 1640; Prenosov: 132
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