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Rangaraj VM, Mabrook G, Hathi Z, Mettu S, Banat F, Taher H. Lacticaseibacillus rhamnosus encapsulated cross-linked Keratin-Chitosan hydrogel for removal of patulin from apple juice. Food Chem 2024; 454:139619. [PMID: 38811285 DOI: 10.1016/j.foodchem.2024.139619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/06/2024] [Accepted: 05/08/2024] [Indexed: 05/31/2024]
Abstract
In this study, we developed a hydrogel from cross-linked keratin and chitosan (KC) to remove patulin (PAT) from apple juice. We explored the potential of incorporating Lactobacillus rhamnoses into the KC hydrogel (KC-LR) and tested its effectiveness in removing PAT from simulated juice solutions and real apple juice. The KC hydrogel was developed through a dynamic disulfide cross-linking reaction. This cross-linked hydrogel network provided excellent stability for the probiotic cells, achieving 99.9 % immobilization efficiency. In simulated juice with 25 mg/L PAT, the KC and KC-LR hydrogels showed removal efficiencies of 85.2 % and 97.68 %, respectively, using 15 mg mL-1 of the prepared hydrogel at a temperature of 25 °C for 6 h. The KC and KC-LR hydrogels achieved 76.3 % and 83.6 % removal efficiencies in real apple juice systems, respectively. Notably, the encapsulated probiotics did not negatively impact the juice quality and demonstrated reusability for up to five cycles of the PAT removal process.
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Affiliation(s)
- Vengatesan M Rangaraj
- Department of Chemical and Petroleum Engineering, SAN Campus, Khalifa University of Science and Technology (KUST), P.O. Box: 127788, Abu Dhabi, United Arab Emirates
| | - Ghanim Mabrook
- Department of Chemical and Petroleum Engineering, SAN Campus, Khalifa University of Science and Technology (KUST), P.O. Box: 127788, Abu Dhabi, United Arab Emirates
| | - Zubeen Hathi
- Department of Chemical and Petroleum Engineering, SAN Campus, Khalifa University of Science and Technology (KUST), P.O. Box: 127788, Abu Dhabi, United Arab Emirates
| | - Srinivas Mettu
- Department of Chemical and Petroleum Engineering, SAN Campus, Khalifa University of Science and Technology (KUST), P.O. Box: 127788, Abu Dhabi, United Arab Emirates
| | - Fawzi Banat
- Department of Chemical and Petroleum Engineering, SAN Campus, Khalifa University of Science and Technology (KUST), P.O. Box: 127788, Abu Dhabi, United Arab Emirates
| | - Hanifa Taher
- Department of Chemical and Petroleum Engineering, SAN Campus, Khalifa University of Science and Technology (KUST), P.O. Box: 127788, Abu Dhabi, United Arab Emirates.
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2
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Bastos BM, Silva PPD, Rocha SFD, Bertolo J, Arias JLDO, Michelon M, Pinto LADA. Preparation of films based on reticulated fish gelatin containing garlic essential oil. Food Res Int 2024; 188:114496. [PMID: 38823843 DOI: 10.1016/j.foodres.2024.114496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 05/07/2024] [Accepted: 05/07/2024] [Indexed: 06/03/2024]
Abstract
Agro-industrial co-products, such as fish gelatin, stand out for their capacity in forming biopolymeric films, being biocompatible and non-toxic; however, its hydrophilicity poses a challenge. Essential oils, rich in bioactives, attract research interest aiming to enhance the protective barrier of films and enable their application in packaging. This study produced films based on cross-linked Nile tilapia skin gelatin, incorporating garlic essential oil. Gelatin obtained through partial collagen hydrolysis from the fish skin and cross-linked with gallic acid had hydroxyproline content of 10.02 g 100 g-1 and gel strength of 287 g, which were consistent with other studies. Oil extraction used supercritical CO2 as a solvent and ethanol as a cosolvent, following a factorial experimental design, evaluating the extraction temperature (40 °C and 70 °C) and cosolvent ratio (1:1 and 1:3), with three central points. Extraction was successful, with higher yields on a dry basis at 70 °C (88.35 %), using a 1:1 cosolvent ratio. Films incorporated with oil exhibited lower water vapor permeability (WVP) than those with only cross-linked gelatin (1.59 (g m-1 s-1 Pa-1) 1011). The film with the most suitable tensile strength (19.07 MPa), elongation (120.91 %), and WVP (1.09 (g m-1 s-1 Pa-1) 1011) properties contained garlic oil extracted at the central point (55 °C and 1:2). Thermal analysis indicated increased melting temperatures in films with added oil, suggesting low thermal degradation. These results suggest that garlic oil addition can improve the properties of fish gelatin-based films, making them promising for biodegradable packaging.
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Affiliation(s)
- Bruna Moura Bastos
- Industrial Technology Laboratory, School of Chemistry and Food, Federal University of Rio Grande - FURG, Itália Avenue, km 08, Carreiros, Rio Grande, RS, 96203-900, Brazil.
| | - Patrick Peres da Silva
- Industrial Technology Laboratory, School of Chemistry and Food, Federal University of Rio Grande - FURG, Itália Avenue, km 08, Carreiros, Rio Grande, RS, 96203-900, Brazil.
| | - Silvia Faria da Rocha
- Federal Institute of Paraná - IFPR, Dr. Tito Street, 801, Jardim Panorama, Jacarezinho, PR, 86400-000, Brazil.
| | - Jordano Bertolo
- Industrial Technology Laboratory, School of Chemistry and Food, Federal University of Rio Grande - FURG, Itália Avenue, km 08, Carreiros, Rio Grande, RS, 96203-900, Brazil.
| | - Jean Lucas de Oliveira Arias
- Industrial Technology Laboratory, School of Chemistry and Food, Federal University of Rio Grande - FURG, Itália Avenue, km 08, Carreiros, Rio Grande, RS, 96203-900, Brazil.
| | - Mariano Michelon
- Industrial Technology Laboratory, School of Chemistry and Food, Federal University of Rio Grande - FURG, Itália Avenue, km 08, Carreiros, Rio Grande, RS, 96203-900, Brazil.
| | - Luiz Antonio de Almeida Pinto
- Industrial Technology Laboratory, School of Chemistry and Food, Federal University of Rio Grande - FURG, Itália Avenue, km 08, Carreiros, Rio Grande, RS, 96203-900, Brazil.
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3
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Lettieri R, Fazio V, Abruzzese D, Di Bartolomeo E, D'Ottavi C, Micheletti A, Tiero A, Duranti L, Armuzza V, Licoccia S, Gatto E. Influence of natural additives on the properties of a milk-based compostable bioplastic. RSC Adv 2024; 14:19041-19053. [PMID: 38895523 PMCID: PMC11184369 DOI: 10.1039/d4ra02291b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 05/23/2024] [Indexed: 06/21/2024] Open
Abstract
The ongoing revolution in the plastic sector is the use of renewable and compostable materials obtained from biomass. However, their mechanical strength and thermal stability are generally not sufficient for practical applications. This study investigates the influence of natural additives on the physical-mechanical properties of a new biobased compostable bioplastic, SP-Milk®, produced from milk scraps. To provide this matrix the appropriate mechanical and thermal properties for daily use while leaving its compostability unchanged, the effect of incorporating vegetal fibres and organic particulates into the bulk bioplastic was investigated. Mechanical tests showed that fibres with a length of 2 mm are capable of increasing ductility by up to 97% compared with the original matrix, whereas fibres with a length of 10 mm led to a more effective reinforcement due to the residual resistance effect, increasing the final compressive strain from 20% (original matrix) to 70.9%. The addition of particulate yielded a harder and more resistant material, and the elastic modulus increased by 21%, although with loss of ductility, compared to SP-Milk® alone. The combination of fibres and particles resulted in the preservation of the positive effects of both components, showing a higher elastic modulus (240 ± 20 MPa, compared to 199 ± 12 MPa for the matrix), higher ductility (+50%) and higher strain at failure (+30%), compared with the matrix. Excellent compatibility between the polymeric matrix and both the fibres and the granules was confirmed using scanning electron microscopy. The thermal analysis demonstrated improved thermal stability particularly because of the effect of the combination of granules and fibres. The results validate that natural reinforcement agents are effective and ecologically advantageous.
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Affiliation(s)
- Raffaella Lettieri
- University of Rome Tor Vergata Department of Chemical Science and Technologies Via Della Ricerca Scientifica 00133 Rome Italy
- Splastica Srl Via Del Lavoro 13, 00045 Genzano di Roma Rome Italy
| | - Veronica Fazio
- University of Rome Tor Vergata Department of Chemical Science and Technologies Via Della Ricerca Scientifica 00133 Rome Italy
| | - Donato Abruzzese
- University of Rome Tor Vergata Department of Civil and Computer Science Engineering Via Del Politecnico, 1 00133 Rome Italy
| | - Elisabetta Di Bartolomeo
- University of Rome Tor Vergata Department of Chemical Science and Technologies Via Della Ricerca Scientifica 00133 Rome Italy
| | - Cadia D'Ottavi
- University of Rome Tor Vergata Department of Chemical Science and Technologies Via Della Ricerca Scientifica 00133 Rome Italy
| | - Andrea Micheletti
- University of Rome Tor Vergata Department of Civil and Computer Science Engineering Via Del Politecnico, 1 00133 Rome Italy
| | - Alessandro Tiero
- University of Rome Tor Vergata Department of Civil and Computer Science Engineering Via Del Politecnico, 1 00133 Rome Italy
| | - Leonardo Duranti
- University of Rome Tor Vergata Department of Chemical Science and Technologies Via Della Ricerca Scientifica 00133 Rome Italy
| | | | - Silvia Licoccia
- University of Rome Tor Vergata Department of Chemical Science and Technologies Via Della Ricerca Scientifica 00133 Rome Italy
- NAST Centre for Nanoscience, Nanotechnology and Instrumentation, University of Rome Tor Vergata, Physics Department Via Della Ricerca Scientifica 00133 Rome Italy
| | - Emanuela Gatto
- University of Rome Tor Vergata Department of Chemical Science and Technologies Via Della Ricerca Scientifica 00133 Rome Italy
- Splastica Srl Via Del Lavoro 13, 00045 Genzano di Roma Rome Italy
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Adhikary ND, Bains A, Tosif MM, Chawla P, Ali N, Ansari MA, Dhull SB, Goksen G. Development of ternary polymeric film based on modified mango seed kernel starch, carboxymethyl cellulose, and gum acacia to extend the shelf-life of bun-bread. Int J Biol Macromol 2024; 273:132915. [PMID: 38844289 DOI: 10.1016/j.ijbiomac.2024.132915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 05/31/2024] [Accepted: 06/03/2024] [Indexed: 06/18/2024]
Abstract
Non-conventional starch sources have attracted substantial attention due to their preferred physicochemical and mechanical properties similar to conventional sources. This study aimed to enhance the mechanical properties of mango seed kernel starch (MSKS) based films reinforced with carboxymethyl cellulose (CMC) and gum acacia (GA). Physical modification of MSKS was carried out using microwave-assisted at 180 W for 1 min. SEM results confirmed the oval and irregular shape of starch. The particle size of native starch (NS) (754.9 ± 20.4 nm) was higher compared to modified starch (MS) 336.6 ± 88.9 nm with a surface charge of -24.80 ± 3.92 to -34.87 ± 3.92 mV, respectively. Several functional groups including hydroxyl (OH) and carboxyl (CH) were confirmed in NS and MS. Different ratios of the MS, NS, CMC, and GA were used for the fabrication of films. Results revealed the higher tensile strength of M/C/G-1 (57.45 ± 0.05 nm) and M/C/G-2 (50.77 ± 0.58), compared to control C-4 (100 % native starch) (4.82 ± 0.04) respectively. The ternary complex provided excellent permeability against moisture and the film with a higher starch concentration confirmed the uniform thickness (0.09-0.10 mm). Furthermore, selected films (M/C/G-1 and M/C/G-2) reduced the microbial growth and weight loss of the bun compared to the control (C-4) film. Thus, the ternary complex maintained the freshness of the bun-bread for 14 days. It can be potentially used as a cost-effective and eco-friendly packaging material for food applications.
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Affiliation(s)
- Nibedita Das Adhikary
- Department of Food Technology and Nutrition, School of Agriculture, Lovely Professional University, Phagwara, Punjab 144411, India
| | - Aarti Bains
- Department of Microbiology, Lovely Professional University, Phagwara, Punjab 144411, India
| | - Mansuri M Tosif
- Department of Food Technology and Nutrition, School of Agriculture, Lovely Professional University, Phagwara, Punjab 144411, India
| | - Prince Chawla
- Department of Food Technology and Nutrition, School of Agriculture, Lovely Professional University, Phagwara, Punjab 144411, India.
| | - Nemat Ali
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Mushtaq Ahmad Ansari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Sanju Bala Dhull
- Department of Food Science & Technology, Chaudhary Devi Lal University, Sirsa 125055, Haryana, India
| | - Gulden Goksen
- Department of Food Technology, Vocational School of Technical Sciences at Mersin Tarsus Organized Industrial Zone, Tarsus University, 33100 Mersin, Türkiye.
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5
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Khan I, Ali A, Naz A, Baig ZT, Shah W, Rahman ZU, Shah TA, Attia KA, Mohammed AA, Hafez YM. Removal of Cr(VI) from Wastewater Using Acrylonitrile Grafted Cellulose Extracted from Sugarcane Bagasse. Molecules 2024; 29:2207. [PMID: 38792069 PMCID: PMC11124459 DOI: 10.3390/molecules29102207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/05/2024] [Accepted: 04/07/2024] [Indexed: 05/26/2024] Open
Abstract
A highly efficient low-cost adsorbent was prepared using raw and chemically modified cellulose isolated from sugarcane bagasse for decontamination of Cr(VI) from wastewater. First, cellulose pulp was isolated from sugarcane bagasse by subjecting it to acid hydrolysis, alkaline hydrolysis and bleaching with sodium chlorate (NaClO3). Then, the bleached cellulose pulp was chemically modified with acrylonitrile monomer in the presence Fenton's reagent (Fe+2/H2O2) to carry out grafting of acrylonitrile onto cellulose by atom transfer radical polymerization. The developed adsorbent (acrylonitrile grafted cellulose) was analyzed by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). Both raw cellulose and acrylonitrile grafted cellulose were used for chromium removal from wastewater. The effects of metal ion concentration, pH, adsorbent dose and time were studied, and their values were optimized. The optimum conditions for the adsorption of Cr(VI) onto raw and chemically modified cellulose were: metal ion concentration: 50 ppm, adsorbent dose: 1 g, pH: 6, and time: 60 min. The maximum efficiencies of 73% and 94% and adsorption capacities of 125.95 mg/g and 267.93 mg/g were achieved for raw and acrylonitrile grafted cellulose, respectively. High removal efficiency was achieved, owing to high surface area of 79.92 m2/g and functional active binding cites on grafted cellulose. Isotherm and kinetics studies show that the experimental data were fully fitted by the Freundlich isotherm model and pseudo first-order model. The adsorbent (acrylonitrile grafted cellulose) was regenerated using three different types of regenerating reagents and reused thirty times, and there was negligible decrease (19%) in removal efficiency after using it for 30 times. Hence, it is anticipated that acrylonitrile could be utilized as potential candidate material for commercial scale Cr(VI) removal from wastewater.
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Affiliation(s)
- Idrees Khan
- Department of Environmental Science, Faculty of Physical & Applied Sciences, The University of Haripur, Haripur 22620, Pakistan; (I.K.); (Z.T.B.); (W.S.); (Z.U.R.)
| | - Ashraf Ali
- School of Chemistry & Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China
- Department of Chemistry, Faculty of Physical & Applied Sciences, The University of Haripur, Haripur 22620, Pakistan
| | - Alia Naz
- Department of Environmental Science, Faculty of Physical & Applied Sciences, The University of Haripur, Haripur 22620, Pakistan; (I.K.); (Z.T.B.); (W.S.); (Z.U.R.)
| | - Zenab Tariq Baig
- Department of Environmental Science, Faculty of Physical & Applied Sciences, The University of Haripur, Haripur 22620, Pakistan; (I.K.); (Z.T.B.); (W.S.); (Z.U.R.)
| | - Wisal Shah
- Department of Environmental Science, Faculty of Physical & Applied Sciences, The University of Haripur, Haripur 22620, Pakistan; (I.K.); (Z.T.B.); (W.S.); (Z.U.R.)
| | - Zia Ur Rahman
- Department of Environmental Science, Faculty of Physical & Applied Sciences, The University of Haripur, Haripur 22620, Pakistan; (I.K.); (Z.T.B.); (W.S.); (Z.U.R.)
| | - Tawaf Ali Shah
- College of Agriculture Engineering and Food Sciences, Shandong University of Technology, Zibo 255000, China;
| | - Kotb A. Attia
- Department of Biochemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (K.A.A.); (A.A.M.)
| | - Arif Ahmed Mohammed
- Department of Biochemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (K.A.A.); (A.A.M.)
| | - Yaser M. Hafez
- EPCRS Excellence Center, Plant Pathology and Biotechnology Laboratory, Agricultural Botany Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt;
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6
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Sadeghi-Kiakhani M, Hashemi E, Norouzi MM. Clean synthesis of silver nanoparticles (AgNPs) on polyamide fabrics by Verbascum thapsus L. (mullein) extract: characterization, colorimetric, antibacterial, and colorfastness studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32637-32648. [PMID: 38658510 DOI: 10.1007/s11356-024-33373-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 04/13/2024] [Indexed: 04/26/2024]
Abstract
The production of antibacterial colored textiles using nanomaterials (NMs) has become an ideal goal from both a research and industrial perspective. In this study, the clean synthesis and characterization of silver nanoparticles (AgNPs) on polyamide fabrics were performed using mullein extract for the first time. Natural dyes were extracted from mullein leaves using an ultrasonic method, with an optimal amount of 15 g/L. The synthesized AgNPs in different ratios of mullein extract and Ag ions were analyzed (using UV-visible spectroscopy) and dynamic light scattering (DLS). It was found that AgNPs synthesized with a ratio of 1:4 of mullein extract: to Ag ions had a diameter of 85 nm. The active site groups of the synthesized AgNPs were characterized using Fourier transform infrared spectroscopy (FT-IR). Nylon fabrics dyed with different ratios of mullein extract and Ag ions exhibited acceptable color strength values (K/S) of 3.36. Furthermore, the reduction in bacterial growth for dyed fabrics improved with an increase in the ratio of Ag ions, with a 100% reduction observed for a sample dyed with mullein extract: Ag ions at a ratio of 1:4. Overall, this method offers a simple, low-cost, and compatible process with environment without the consumption of any chemicals to producing nylon with acceptable antibacterial and dyeing properties.
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Affiliation(s)
- Mousa Sadeghi-Kiakhani
- Department of Organic Colorants, Institute for Color Science and Technology, Tehran, Iran.
| | - Elaheh Hashemi
- Department of Chemistry, Faculty of Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran
| | - Mohammad-Mahdi Norouzi
- Department of Chemistry, Faculty of Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran
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7
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Nolasco A, Squillante J, Velotto S, D’Auria G, Ferranti P, Mamone G, Errico ME, Avolio R, Castaldo R, De Luca L, Romano R, Esposito F, Cirillo T. Exploring the Untapped Potential of Pine Nut Skin By-Products: A Holistic Characterization and Recycling Approach. Foods 2024; 13:1044. [PMID: 38611351 PMCID: PMC11011278 DOI: 10.3390/foods13071044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/11/2024] [Accepted: 03/20/2024] [Indexed: 04/14/2024] Open
Abstract
The increasing population, food demand, waste management concerns, and the search for sustainable alternatives to plastic polymers have led researchers to explore the potential of waste materials. This study focused on a waste of pine nut processing referred to in this paper as pine nut skin. For the first time, its nutritional profile, potential bioactive peptide, contaminants, and morphological structure were assessed. Pine nut skin was composed mainly of carbohydrates (56.2%) and fiber (27.5%). The fat (9.8%) was about 45%, 35%, and 20% saturated, monounsaturated, and polyunsaturated fatty acid, respectively, and Omega-9,-6, and -3 were detected. Notably, oleic acid, known for its health benefits, was found in significant quantities, resembling its presence in pine nut oil. The presence of bioactive compounds such as eicosapentaenoic acid (EPA) and phytosterols further adds to its nutritional value. Some essential elements were reported, whereas most of the contaminants such as heavy metals, polycyclic aromatic hydrocarbons, rare earth elements, and pesticides were below the limit of quantification. Furthermore, the in silico analysis showed the occurrence of potential precursor peptides of bioactive compounds, indicating health-promoting attributes. Lastly, the morphological structural characterization of the pine nut skin was followed by Fourier Transform Infrared and solid-state NMR spectroscopy to identify the major components, such as lignin, cellulose, and hemicellulose. The thermostability of the pine nut skin was monitored via thermogravimetric analysis, and the surface of the integument was analyzed via scanning electron microscopy and volumetric nitrogen adsorption. This information provides a more comprehensive view of the potential uses of pine nut skin as a filler material for biocomposite materials. A full characterization of the by-products of the food chain is essential for their more appropriate reuse.
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Affiliation(s)
- Agata Nolasco
- Department of Agricultural Sciences, University of Naples “Federico II”, Via Università, 100, 100-80055 Portici, NA, Italy
| | - Jonathan Squillante
- Department of Agricultural Sciences, University of Naples “Federico II”, Via Università, 100, 100-80055 Portici, NA, Italy
| | - Salvatore Velotto
- Department of Promotion of Human Sciences and the Quality of Life, University of Study of Roma “San Raffaele”, Via di Val Cannuta, 247-00166 Roma, Italy
| | - Giovanni D’Auria
- Department of Agricultural Sciences, University of Naples “Federico II”, Via Università, 100, 100-80055 Portici, NA, Italy
| | - Pasquale Ferranti
- Department of Agricultural Sciences, University of Naples “Federico II”, Via Università, 100, 100-80055 Portici, NA, Italy
| | - Gianfranco Mamone
- Institute of Food Science, National Research Council, 83100 Avellino, Italy
| | - Maria Emanuela Errico
- Institute for Polymers Composites and Biomaterials-National Research Council of Italy (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli, NA, Italy
| | - Roberto Avolio
- Institute for Polymers Composites and Biomaterials-National Research Council of Italy (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli, NA, Italy
| | - Rachele Castaldo
- Institute for Polymers Composites and Biomaterials-National Research Council of Italy (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli, NA, Italy
| | - Lucia De Luca
- Department of Agricultural Sciences, University of Naples “Federico II”, Via Università, 100, 100-80055 Portici, NA, Italy
| | - Raffaele Romano
- Department of Agricultural Sciences, University of Naples “Federico II”, Via Università, 100, 100-80055 Portici, NA, Italy
| | - Francesco Esposito
- Department of Agricultural Sciences, University of Naples “Federico II”, Via Università, 100, 100-80055 Portici, NA, Italy
| | - Teresa Cirillo
- Department of Agricultural Sciences, University of Naples “Federico II”, Via Università, 100, 100-80055 Portici, NA, Italy
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8
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Kim S, Kim JC, Kim YY, Yang JE, Lee HM, Hwang IM, Park HW, Kim HM. Utilization of coffee waste as a sustainable feedstock for high-yield lactic acid production through microbial fermentation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169521. [PMID: 38141985 DOI: 10.1016/j.scitotenv.2023.169521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/27/2023] [Accepted: 12/17/2023] [Indexed: 12/25/2023]
Abstract
Lactic acid is an important industrial precursor; however, high substrate costs are a major challenge in microbial fermentation-based lactic acid production. Coffee waste is a sustainable feedstock alternative for lactic acid production via microbial fermentation. Herein, the feasibility of coffee waste as a feedstock was explored by employing appropriate pretreatment methods and optimizing enzyme combinations. Coffee waste pretreatment with hydrogen peroxide and acetic acid along with a combination of Viscozyme L, Celluclast 1.5 L, and Pectinex Ultra SP-L achieved the 78.9 % sugar conversion rate at a substrate concentration of 4 % (w/v). Lactiplantibacillus plantarum WiKim0126-induced fermentation with a 4 % solid loading yielded a lactic acid concentration of 22.8 g/L (99.6 % of the theoretical maximum yield) and productivity of 0.95 g/L/h within 24 h. These findings highlight the viability of coffee waste as an eco-friendly resource for sustainable lactic acid production.
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Affiliation(s)
- Seulbi Kim
- Technology Innovation Research Division, World Institute of Kimchi, Gwangju, Republic of Korea; Department of Agricultural Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jong-Cheol Kim
- Technology Innovation Research Division, World Institute of Kimchi, Gwangju, Republic of Korea
| | - Yeong Yeol Kim
- Technology Innovation Research Division, World Institute of Kimchi, Gwangju, Republic of Korea; Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jung Eun Yang
- Technology Innovation Research Division, World Institute of Kimchi, Gwangju, Republic of Korea
| | - Hee Min Lee
- Kimchi Industry Promotion Division, World Institute of Kimchi, Gwangju 61755, Republic of Korea
| | - In Min Hwang
- Technology Innovation Research Division, World Institute of Kimchi, Gwangju, Republic of Korea
| | - Hae Woong Park
- Technology Innovation Research Division, World Institute of Kimchi, Gwangju, Republic of Korea
| | - Ho Myeong Kim
- Technology Innovation Research Division, World Institute of Kimchi, Gwangju, Republic of Korea.
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9
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Calovi M, Rossi S. Assessing the Impact of Sepiolite-Based Bio-Pigment Infused with Indigo Extract on Appearance and Durability of Water-Based White Primer. MATERIALS (BASEL, SWITZERLAND) 2024; 17:941. [PMID: 38399192 PMCID: PMC10889954 DOI: 10.3390/ma17040941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 01/30/2024] [Accepted: 02/15/2024] [Indexed: 02/25/2024]
Abstract
The objective of this study is to evaluate how two varying amounts of sepiolite-based powder, infused with indigo extract, affect the appearance and durability of a water-based, white primer. To examine the influence of this eco-friendly pigment on the coatings' overall appearance, assessments were performed for color, gloss, and surface roughness. Additionally, the coatings were investigated through optical and electron microscopic observations, to evaluate the distribution of the pigment within the polymer matrix. The effect of the pigment on the coating's durability was assessed through accelerated tests, including exposure in a salt spray chamber and a UV-B chamber. These tests aimed to evaluate the emergence of defects and changes in the appearance of the samples over time. Furthermore, the impact of different quantities of sepiolite-based powder on the coating's ability to act as a barrier was assessed using liquid resistance tests and contact angle measurements. These evaluations aimed to understand how the coating responded to various liquids and its surface properties concerning repellency or absorption. In essence, this study underscores the considerable influence of the eco-friendly pigment, demonstrating its capacity to introduce unique color and texture variations in the paint. Moreover, the inclusion of the pigment has enhanced the coating's color stability, its ability to act as a barrier, and its overall durability when exposed to harsh environments.
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Affiliation(s)
| | - Stefano Rossi
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy;
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10
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Contato AG, Borelli TC, Buckeridge MS, Rogers J, Hartson S, Prade RA, Polizeli MDLTDM. Secretome Analysis of Thermothelomyces thermophilus LMBC 162 Cultivated with Tamarindus indica Seeds Reveals CAZymes for Degradation of Lignocellulosic Biomass. J Fungi (Basel) 2024; 10:121. [PMID: 38392793 PMCID: PMC10890306 DOI: 10.3390/jof10020121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/06/2024] [Accepted: 01/11/2024] [Indexed: 02/24/2024] Open
Abstract
The analysis of the secretome allows us to identify the proteins, especially carbohydrate-active enzymes (CAZymes), secreted by different microorganisms cultivated under different conditions. The CAZymes are divided into five classes containing different protein families. Thermothelomyces thermophilus is a thermophilic ascomycete, a source of many glycoside hydrolases and oxidative enzymes that aid in the breakdown of lignocellulosic materials. The secretome analysis of T. thermophilus LMBC 162 cultivated with submerged fermentation using tamarind seeds as a carbon source revealed 79 proteins distributed between the five diverse classes of CAZymes: 5.55% auxiliary activity (AAs); 2.58% carbohydrate esterases (CEs); 20.58% polysaccharide lyases (PLs); and 71.29% glycoside hydrolases (GHs). In the identified GH families, 54.97% are cellulolytic, 16.27% are hemicellulolytic, and 0.05 are classified as other. Furthermore, 48.74% of CAZymes have carbohydrate-binding modules (CBMs). Observing the relative abundance, it is possible to state that only thirteen proteins comprise 92.19% of the identified proteins secreted and are probably the main proteins responsible for the efficient degradation of the bulk of the biomass: cellulose, hemicellulose, and pectin.
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Affiliation(s)
- Alex Graça Contato
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14049-900, SP, Brazil
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK 74078, USA
| | - Tiago Cabral Borelli
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14049-901, SP, Brazil
| | - Marcos Silveira Buckeridge
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo 05508-090, SP, Brazil
| | - Janet Rogers
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK 74078, USA
| | - Steven Hartson
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK 74078, USA
| | - Rolf Alexander Prade
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK 74078, USA
| | - Maria de Lourdes Teixeira de Moraes Polizeli
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14049-900, SP, Brazil
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-901, SP, Brazil
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11
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Petrovic SM, Barbinta-Patrascu ME. Organic and Biogenic Nanocarriers as Bio-Friendly Systems for Bioactive Compounds' Delivery: State-of-the Art and Challenges. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7550. [PMID: 38138692 PMCID: PMC10744464 DOI: 10.3390/ma16247550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 11/29/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023]
Abstract
"Green" strategies to build up novel organic nanocarriers with bioperformance are modern trends in nanotechnology. In this way, the valorization of bio-wastes and the use of living systems to develop multifunctional organic and biogenic nanocarriers (OBNs) have revolutionized the nanotechnological and biomedical fields. This paper is a comprehensive review related to OBNs for bioactives' delivery, providing an overview of the reports on the past two decades. In the first part, several classes of bioactive compounds and their therapeutic role are briefly presented. A broad section is dedicated to the main categories of organic and biogenic nanocarriers. The major challenges regarding the eco-design and the fate of OBNs are suggested to overcome some toxicity-related drawbacks. Future directions and opportunities, and finding "green" solutions for solving the problems related to nanocarriers, are outlined in the final of this paper. We believe that through this review, we will capture the attention of the readers and will open new perspectives for new solutions/ideas for the discovery of more efficient and "green" ways in developing novel bioperformant nanocarriers for transporting bioactive agents.
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Affiliation(s)
- Sanja M. Petrovic
- Department of Chemical Technologies, Faculty of Technology, University of Nis, Bulevar Oslobodjenja 124, 1600 Leskovac, Serbia;
| | - Marcela-Elisabeta Barbinta-Patrascu
- Department of Electricity, Solid-State Physics and Biophysics, Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Măgurele, Romania
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12
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de Oliveira NMT, Schneider VS, Bueno LR, de Mello Braga LLV, da Silva KS, Malaquias da Silva LC, Souza ML, da Luz BB, Lima CD, Bastos RS, de Paula Werner MF, Fernandes ES, Rocha JA, Gois MB, Cordeiro LMC, Maria-Ferreira D. CPW partially attenuates DSS-induced ulcerative colitis in mice. Food Res Int 2023; 173:113334. [PMID: 37803644 DOI: 10.1016/j.foodres.2023.113334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/27/2023] [Accepted: 07/27/2023] [Indexed: 10/08/2023]
Abstract
Ulcerative colitis (UC) is a chronic inflammatory bowel disease (IBD) of the gastrointestinal tract. The etiology is not fully understood, but environmental, microbial, and immunologic factors, as well as a genetic predisposition, play a role. UC is characterized by episodes of abdominal pain, diarrhea, bloody stools, weight loss, severe colonic inflammation, and ulceration. Despite the increase in the frequency of UC and the deterioration of the quality of life, there are still patients who do not respond well to available treatment options. Against this background, natural products such as polysaccharides are becoming increasingly important as they protect the intestinal mucosa, promote wound healing, relieve inflammation and pain, and restore intestinal motility. In this study, we investigated the effect of a polysaccharide isolated from the biomass of Campomanesia adamantium and Campomanesia pubescens (here referred to as CPW) in an experimental model of acute and chronic ulcerative colitis induced by dextran sulfate sodium (DSS). CPW reversed weight loss, increased disease activity index (DAI), bloody diarrhea, and colon shortening. In addition, CPW reduced visceral mechanical hypersensitivity, controlled oxidative stress and inflammation, and protected the mucosal barrier. CPW is not absorbed in the intestine, does not inhibit cytochrome P450 proteins, and does not exhibit AMES toxicity. These results suggest that CPW attenuates DSS-induced acute and chronic colitis in mice and may be a potential alternative treatment for UC.
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Affiliation(s)
- Natalia Mulinari Turin de Oliveira
- Instituto de Pesquisa Pelé Pequeno Príncipe, Faculdades Pequeno Príncipe, Curitiba 80250-060, PR, Brazil; Programa de Pós-graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente, Faculdades Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - Vanessa S Schneider
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, Paraná, Brazil
| | - Laryssa Regis Bueno
- Instituto de Pesquisa Pelé Pequeno Príncipe, Faculdades Pequeno Príncipe, Curitiba 80250-060, PR, Brazil; Programa de Pós-graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente, Faculdades Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - Lara Luisa Valerio de Mello Braga
- Instituto de Pesquisa Pelé Pequeno Príncipe, Faculdades Pequeno Príncipe, Curitiba 80250-060, PR, Brazil; Programa de Pós-graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente, Faculdades Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - Karien Sauruk da Silva
- Instituto de Pesquisa Pelé Pequeno Príncipe, Faculdades Pequeno Príncipe, Curitiba 80250-060, PR, Brazil; Programa de Pós-graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente, Faculdades Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - Liziane Cristine Malaquias da Silva
- Instituto de Pesquisa Pelé Pequeno Príncipe, Faculdades Pequeno Príncipe, Curitiba 80250-060, PR, Brazil; Programa de Pós-graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente, Faculdades Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - Maria Luiza Souza
- Faculdade de Ciências da Saúde, Universidade Federal de Rondonópolis, Rondonópolis, MT, Brazil
| | - Bruna Barbosa da Luz
- Departamento de Farmacologia, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | - Cleiane Dias Lima
- Programa de Pós-Graduação em Biotecnologia, PPGBIOTEC, Universidade Federal do Delta do Parnaíba, UFDPar, Parnaíba, PI, Brazil
| | - Ruan Sousa Bastos
- Programa de Pós-Graduação em Biotecnologia, PPGBIOTEC, Universidade Federal do Delta do Parnaíba, UFDPar, Parnaíba, PI, Brazil
| | | | - Elizabeth Soares Fernandes
- Instituto de Pesquisa Pelé Pequeno Príncipe, Faculdades Pequeno Príncipe, Curitiba 80250-060, PR, Brazil; Programa de Pós-graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente, Faculdades Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - Jefferson Almeida Rocha
- Programa de Pós-Graduação em Biotecnologia, PPGBIOTEC, Universidade Federal do Delta do Parnaíba, UFDPar, Parnaíba, PI, Brazil
| | - Marcelo Biondaro Gois
- Faculdade de Ciências da Saúde, Universidade Federal de Rondonópolis, Rondonópolis, MT, Brazil
| | | | - Daniele Maria-Ferreira
- Instituto de Pesquisa Pelé Pequeno Príncipe, Faculdades Pequeno Príncipe, Curitiba 80250-060, PR, Brazil; Programa de Pós-graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente, Faculdades Pequeno Príncipe, Curitiba, Paraná, Brazil.
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13
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Monroy Y, Rivero S, García MA. Liquid and Pressure-Sensitive Adhesives Based on Cassava Starch and Gelatin Capsule Residue: Green Alternatives for the Packaging Industry. Foods 2023; 12:3982. [PMID: 37959101 PMCID: PMC10647541 DOI: 10.3390/foods12213982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/27/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023] Open
Abstract
Natural polymer-based adhesives are green alternatives, necessary to reduce the problems impacted by synthetic adhesives. Starch and gelatin have extraordinary potential for the synthesis of biobased adhesives. Citric acid (CA), a natural acid, induces the crosslinking and hydrolyzing of both gelatin and starch. In this sense, this work deals with the use of gelatin capsule residues as a promising material to produce biobased adhesives in combination with cassava starch in the presence of different CA concentrations characterizing their mechanical, physicochemical and microstructural properties. Depending on CA concentration, formulations adjusted to different applications can be obtained such as liquid and pressure-sensitive adhesive films. The inclusion of CA allows us not only to improve the applicability of the system since it modifies the flowability of the adhesives as evidenced by the observed changes in the viscosity (from 158.3 to 90.3 for formulations with 20 and 80% CA, respectively). In addition, mechanical profiles showed that the inclusion of CA increased the adhesive bond strength (from 2230.7 to 2638.7 for formulations with 20 and 80% CA, respectively). Structural modifications induced by CA in adhesive formulations were highlighted by ATR-FTIR analysis.
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Affiliation(s)
- Yuliana Monroy
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA-CONICET), 47 y 116 S/N, La Plata B1900AJJ, Buenos Aires, Argentina; (Y.M.); (S.R.)
| | - Sandra Rivero
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA-CONICET), 47 y 116 S/N, La Plata B1900AJJ, Buenos Aires, Argentina; (Y.M.); (S.R.)
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), 47 y 115 S/N, La Plata B1900AJJ, Buenos Aires, Argentina
| | - María Alejandra García
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA-CONICET), 47 y 116 S/N, La Plata B1900AJJ, Buenos Aires, Argentina; (Y.M.); (S.R.)
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), 47 y 115 S/N, La Plata B1900AJJ, Buenos Aires, Argentina
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14
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Sasimowski E, Grochowicz M, Szajnecki Ł. Preparation and Spectroscopic, Thermal, and Mechanical Characterization of Biocomposites of Poly(butylene succinate) and Onion Peels or Durum Wheat Bran. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6799. [PMID: 37895780 PMCID: PMC10607975 DOI: 10.3390/ma16206799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/16/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023]
Abstract
The utilization of plant based fillers: onion peels (OP) and durum wheat bran (WB) to obtain sustainable biocomposite materials with poly(butylene succinate) (PBS) is presented in this paper. The biocomposites were first obtained in pellet form by extrusion method and then injection moldings were made from the pellets. Two kinds of biocomposites were fabricated containing 15% and 30% wt. of OP or WB. Additionally, pure PBS moldings were prepared for comparative purposes. The effect of the filler type and its amount on the chemical structure, density, thermal, and thermo-mechanical properties of the fabricated composite samples was studied. Fourier-transform infrared spectroscopy results showed that the composite preparation method had no effect on the chemical structure of composite components, but weak interactions such as hydrogen bonding between OP or WB and PBS was observed. The addition of OP or WB to the composite with PBS reduced its thermal stability in comparison with pure PBS, all studied composites start to degrade below 290 °C. Additionally, the mechanical properties of the composites are worse than PBS, as the impact strength dropped by about 70%. The deterioration of tensile strength was in the range 20-47%, and the elongation at maximum load of the composites was in the range 9.22-3.42%, whereas for pure PBS it was 16.75%. On the other hand, the crystallinity degree increased from 63% for pure PBS to 79% for composite with 30% wt. of WB. The Young's modulus increased to 160% for composition with 30% wt. of OP. Additionally, the hardness of the composites was slightly higher than PBS and was in the range 38.2-48.7 MPa. Despite the reduction in thermal stability and some mechanical properties, the studied composites show promise for everyday object production.
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Affiliation(s)
- Emil Sasimowski
- Department of Technology and Polymer Processing, Faculty of Mechanical Engineering, Lublin University of Technology, 20-618 Lublin, Poland;
| | - Marta Grochowicz
- Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-614 Lublin, Poland;
| | - Łukasz Szajnecki
- Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-614 Lublin, Poland;
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15
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Pacheco A, Evangelista-Osorio A, Muchaypiña-Flores KG, Marzano-Barreda LA, Paredes-Concepción P, Palacin-Baldeón H, Dos Santos MSN, Tres MV, Zabot GL, Olivera-Montenegro L. Polymeric Materials Obtained by Extrusion and Injection Molding from Lignocellulosic Agroindustrial Biomass. Polymers (Basel) 2023; 15:4046. [PMID: 37896290 PMCID: PMC10610583 DOI: 10.3390/polym15204046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/03/2023] [Accepted: 10/03/2023] [Indexed: 10/29/2023] Open
Abstract
This review presents the advances in polymeric materials achieved by extrusion and injection molding from lignocellulosic agroindustrial biomass. Biomass, which is derived from agricultural and industrial waste, is a renewable and abundant feedstock that contains mainly cellulose, hemicellulose, and lignin. To improve the properties and functions of polymeric materials, cellulose is subjected to a variety of modifications. The most common modifications are surface modification, grafting, chemical procedures, and molecule chemical grafting. Injection molding and extrusion technologies are crucial in shaping and manufacturing polymer composites, with precise control over the process and material selection. Furthermore, injection molding involves four phases: plasticization, injection, cooling, and ejection, with a focus on energy efficiency. Fundamental aspects of an injection molding machine, such as the motor, hopper, heating units, nozzle, and clamping unit, are discussed. Extrusion technology, commonly used as a preliminary step to injection molding, presents challenges regarding fiber reinforcement and stress accumulation, while lignin-based polymeric materials are challenging due to their hydrophobicity. The diverse applications of these biodegradable materials include automotive industries, construction, food packaging, and various consumer goods. Polymeric materials are positioned to offer even bigger contributions to sustainable and eco-friendly solutions in the future, as research and development continues.
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Affiliation(s)
- Ada Pacheco
- Bioprocesses and Biomass Conversion Research Group, Universidad San Ignacio de Loyola, La Molina 15024, Peru; (A.P.); (A.E.-O.); (K.G.M.-F.); (L.A.M.-B.); (H.P.-B.)
| | - Arian Evangelista-Osorio
- Bioprocesses and Biomass Conversion Research Group, Universidad San Ignacio de Loyola, La Molina 15024, Peru; (A.P.); (A.E.-O.); (K.G.M.-F.); (L.A.M.-B.); (H.P.-B.)
| | - Katherine Gabriela Muchaypiña-Flores
- Bioprocesses and Biomass Conversion Research Group, Universidad San Ignacio de Loyola, La Molina 15024, Peru; (A.P.); (A.E.-O.); (K.G.M.-F.); (L.A.M.-B.); (H.P.-B.)
| | - Luis Alejandro Marzano-Barreda
- Bioprocesses and Biomass Conversion Research Group, Universidad San Ignacio de Loyola, La Molina 15024, Peru; (A.P.); (A.E.-O.); (K.G.M.-F.); (L.A.M.-B.); (H.P.-B.)
| | - Perla Paredes-Concepción
- Grupo de Ciencia, Tecnología e Innovación en Alimentos, Universidad San Ignacio de Loyola, La Molina 15024, Peru;
| | - Heidy Palacin-Baldeón
- Bioprocesses and Biomass Conversion Research Group, Universidad San Ignacio de Loyola, La Molina 15024, Peru; (A.P.); (A.E.-O.); (K.G.M.-F.); (L.A.M.-B.); (H.P.-B.)
| | - Maicon Sérgio Nascimento Dos Santos
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040 Sete de Setembro St., Center DC, Cachoeira do Sul, Santa Maria 96508-010, RS, Brazil; (M.S.N.D.S.); (M.V.T.); (G.L.Z.)
| | - Marcus Vinícius Tres
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040 Sete de Setembro St., Center DC, Cachoeira do Sul, Santa Maria 96508-010, RS, Brazil; (M.S.N.D.S.); (M.V.T.); (G.L.Z.)
| | - Giovani Leone Zabot
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040 Sete de Setembro St., Center DC, Cachoeira do Sul, Santa Maria 96508-010, RS, Brazil; (M.S.N.D.S.); (M.V.T.); (G.L.Z.)
| | - Luis Olivera-Montenegro
- Bioprocesses and Biomass Conversion Research Group, Universidad San Ignacio de Loyola, La Molina 15024, Peru; (A.P.); (A.E.-O.); (K.G.M.-F.); (L.A.M.-B.); (H.P.-B.)
- Grupo de Ciencia, Tecnología e Innovación en Alimentos, Universidad San Ignacio de Loyola, La Molina 15024, Peru;
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16
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Poongavanam SS, Subramaniyan V, Sellamuthu PS, Jarugala J, Sadiku ER. Fabrication of Bio-Nanocomposite Packaging Films with PVA, MMt Clay Nanoparticles, CNCs, and Essential Oils for the Postharvest Preservation of Sapota Fruits. Polymers (Basel) 2023; 15:3589. [PMID: 37688215 PMCID: PMC10490128 DOI: 10.3390/polym15173589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/14/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023] Open
Abstract
Sapota is an important climacteric fruit with limited shelf life. A special system must be employed to extend the shelf life of sapota fruits. In the present study, polyvinyl alcohol (PVA) and montmorillonite clay (MMt)-based bio-nanocomposite films (BNFs) were integrated at various concentrations (2%, 4%, 6%, and 8%) into cellulose nanocrystals (CNCs), produced from garlic peels (GPs). The BNF loaded with 8% CNC has a better crystallinity index and mechanical properties than the other concentrations of CNC. Therefore, the 8% CNC-incorporated BNF (BNF-8) was selected for further packaging studies. The combined effect of BNF-8 with ajwain essential oil (AO) and oregano essential oil (OO) vapors and BNF-8 with carbendazim (commercial fungicide-CARB) were investigated. In this study, the BNF-based packagings are categorized into five types, viz: BNF+8% CNC (BNF-8), BNF-8+AO, BNF-8+OO, BNF-8+CARB and the non-packaged fruits (control). The shelf-life duration, antioxidant activity, firmness, decay index, and sensory quality were evaluated in order to identify the effectiveness of packaging treatment on sapota fruits. BNF-8+CARB, BNF-8+AO, and BNF-8+OO packaging extended the shelf life of sapota fruits to up to 12 days and maintained the overall physiochemical parameters and sensory qualities of the fruits. Therefore, the BNF-8+AO and BNF-8+OO packaging materials are appropriate alternatives to commercial fungicides for the preservation of sapota during postharvest storage.
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Affiliation(s)
- Senthamil Selvi Poongavanam
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Potheri, Kattankulathur, Chengalpattu 603203, Tamilnadu, India; (S.S.P.); (V.S.)
| | - Vishnupriya Subramaniyan
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Potheri, Kattankulathur, Chengalpattu 603203, Tamilnadu, India; (S.S.P.); (V.S.)
| | - Periyar Selvam Sellamuthu
- Department of Food Process Engineering, Postharvest Research Lab., School of Bioengineering, SRM Institute of Science and Technology, Potheri, Kattankulathur, Chengalpattu 603203, Tamilnadu, India
| | - Jayaramudu Jarugala
- Polymer and Petroleum Group, Material Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India;
| | - Emmanuel Rotimi Sadiku
- Institute of NanoEngineering Research (INER), Department of Chemical, Metallurgical and Materials Engineering, Pretoria West Campus, Tshwane University of Technology, Staatsartillerie Rd., Pretoria 0183, South Africa;
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17
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Zamora-Mendoza L, Gushque F, Yanez S, Jara N, Álvarez-Barreto JF, Zamora-Ledezma C, Dahoumane SA, Alexis F. Plant Fibers as Composite Reinforcements for Biomedical Applications. Bioengineering (Basel) 2023; 10:804. [PMID: 37508831 PMCID: PMC10376539 DOI: 10.3390/bioengineering10070804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/24/2023] [Accepted: 06/27/2023] [Indexed: 07/30/2023] Open
Abstract
Plant fibers possess high strength, high fracture toughness and elasticity, and have proven useful because of their diversity, versatility, renewability, and sustainability. For biomedical applications, these natural fibers have been used as reinforcement for biocomposites to infer these hybrid biomaterials mechanical characteristics, such as stiffness, strength, and durability. The reinforced hybrid composites have been tested in structural and semi-structural biodevices for potential applications in orthopedics, prosthesis, tissue engineering, and wound dressings. This review introduces plant fibers, their properties and factors impacting them, in addition to their applications. Then, it discusses different methodologies used to prepare hybrid composites based on these widespread, renewable fibers and the unique properties that the obtained biomaterials possess. It also examines several examples of hybrid composites and their biomedical applications. Finally, the findings are summed up and some thoughts for future developments are provided. Overall, the focus of the present review lies in analyzing the design, requirements, and performance, and future developments of hybrid composites based on plant fibers.
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Affiliation(s)
- Lizbeth Zamora-Mendoza
- Departamento de Ingeniería Química, Colegio de Ciencias e Ingenierías, Instituto de Microbiología, Institute for Energy and Materials, Universidad San Francisco de Quito USFQ, Quito 170901, Ecuador
| | - Fernando Gushque
- School of Biological Sciences and Engineering, Yachay Tech University, Urcuquí 100119, Ecuador
| | - Sabrina Yanez
- School of Biological Sciences and Engineering, Yachay Tech University, Urcuquí 100119, Ecuador
| | - Nicole Jara
- School of Biological Sciences and Engineering, Yachay Tech University, Urcuquí 100119, Ecuador
| | - José F Álvarez-Barreto
- Departamento de Ingeniería Química, Colegio de Ciencias e Ingenierías, Instituto de Microbiología, Institute for Energy and Materials, Universidad San Francisco de Quito USFQ, Quito 170901, Ecuador
| | - Camilo Zamora-Ledezma
- Green and Innovative Technologies for Food, Environment and Bioengineering Research Group (FEnBeT), Faculty of Pharmacy and Nutrition, UCAM-Universidad Católica de Murcia, Avda, Los Jerónimos 135, Guadalupe de Maciascoque, 30107 Murcia, Spain
| | - Si Amar Dahoumane
- Department of Chemistry and Biochemistry, Université de Moncton, 18 Avenue Antonine-Maillet, Moncton, NB E1A 3E9, Canada
| | - Frank Alexis
- Departamento de Ingeniería Química, Colegio de Ciencias e Ingenierías, Instituto de Microbiología, Institute for Energy and Materials, Universidad San Francisco de Quito USFQ, Quito 170901, Ecuador
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18
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Bangar SP, Whiteside WS, Kajla P, Tavassoli M. Value addition of rice straw cellulose fibers as a reinforcer in packaging applications. Int J Biol Macromol 2023:125320. [PMID: 37307977 DOI: 10.1016/j.ijbiomac.2023.125320] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 05/27/2023] [Accepted: 06/08/2023] [Indexed: 06/14/2023]
Abstract
The potential use of agro-waste in food packaging applications is receiving remarkable attention due to its sustainable approach and biodegradable properties. As typical lignocellulosic biomass, rice straw (RS) is widely produced but is usually abandoned and burned, causing tremendous environmental concerns. The exploration of using RS as the source of biodegradable packaging materials is promising for economically converting this agricultural waste into packaging material, thereby providing a considerable solution for RS disposal and an alternative solution to synthetic plastic waste. Polymers have been infused with nanoparticles, fibers, and whiskers, along with plasticizers and cross-linkers, and fillers like nanoparticles and fibers. They have also been blended with natural extracts, essential oils, and other synthetic and natural polymers to improve RS properties. There is still much research to be done before this biopolymer can be applied at an industrial level in food packaging. In this respect, RS can be valued for packaging to add value to these underutilized residues. This review article focuses on the extraction methods and functionality of cellulose fibers and their nanostructured forms from RS and their utilization in packaging applications.
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Affiliation(s)
- Sneh Punia Bangar
- Department of Food, Nutrition and Packaging Sciences, Clemson University, Clemson 29634, USA.
| | - William Scott Whiteside
- Department of Food, Nutrition and Packaging Sciences, Clemson University, Clemson 29634, USA
| | - Priyanka Kajla
- Guru Jambheshwar University of Science &Technology, Hisar, 125001, Haryana, India
| | - Milad Tavassoli
- Student's Research Committee, Department of Food Science and Technology, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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Kurańska M, Ptak M, Malewska E, Prociak A, Barczewski M, Dymek M, Fernandes FAO, de Sousa RA, Polaczek K, Studniarz K, Uram K. Cork Porous Biocomposites with Polyurethane Matrix Modified with Polyol Based on Used Cooking Oil. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3032. [PMID: 37109868 PMCID: PMC10146137 DOI: 10.3390/ma16083032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/27/2023] [Accepted: 03/31/2023] [Indexed: 06/19/2023]
Abstract
Renewable materials are materials that are replenished naturally and can be used again and again. These materials include things such as bamboo, cork, hemp, and recycled plastic. The use of renewable components helps to reduce the dependence on petrochemical resources and reduce waste. Adopting these materials in various industries such as construction, packaging, and textiles can lead to a more sustainable future and decrease the carbon footprint. The presented research describes new porous polyurethane biocomposites based on used cooking oil polyol (50 per hundred polyol-php) modified with cork (3, 6, 9, and 12 php). The research described here demonstrated that it is possible to replace some petrochemical raw materials with raw materials of renewable origin. This was achieved by replacing one of the petrochemical components used for the synthesis of the polyurethane matrix with a waste vegetable oil component. The modified foams were analyzed in terms of their apparent density, coefficient of thermal conductivity, compressive strength at 10% of deformation, brittleness, short-term water absorption, thermal stability, and water vapor permeability, while their morphology was examined using scanning electron microscopy and the content of closed cells. After the successful introduction of a bio-filler, it was found that the thermal insulation properties of the modified biomaterials were comparable to those of the reference material. It was concluded that it is possible to replace some petrochemical raw materials with raw materials of renewable origin.
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Affiliation(s)
- Maria Kurańska
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (M.K.); (A.P.); (K.P.); (K.S.); (K.U.)
| | - Mariusz Ptak
- Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Łukasiewicza 7/9, 50-371 Wrocław, Poland; (M.P.); (M.D.)
| | - Elżbieta Malewska
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (M.K.); (A.P.); (K.P.); (K.S.); (K.U.)
| | - Aleksander Prociak
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (M.K.); (A.P.); (K.P.); (K.S.); (K.U.)
| | - Mateusz Barczewski
- Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland;
| | - Mateusz Dymek
- Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Łukasiewicza 7/9, 50-371 Wrocław, Poland; (M.P.); (M.D.)
| | - Fábio A. O. Fernandes
- TEMA: Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; (F.A.O.F.); (R.A.d.S.)
- LASI—Intelligent Systems Associate Laboratory, 4800-058 Guimaraes, Portugal
| | - Ricardo Alves de Sousa
- TEMA: Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; (F.A.O.F.); (R.A.d.S.)
- LASI—Intelligent Systems Associate Laboratory, 4800-058 Guimaraes, Portugal
| | - Krzysztof Polaczek
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (M.K.); (A.P.); (K.P.); (K.S.); (K.U.)
| | - Karolina Studniarz
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (M.K.); (A.P.); (K.P.); (K.S.); (K.U.)
| | - Katarzyna Uram
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (M.K.); (A.P.); (K.P.); (K.S.); (K.U.)
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Calovi M, Rossi S. Durability and Thermal Behavior of Functional Paints Formulated with Recycled-Glass Hollow Microspheres of Different Size. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2678. [PMID: 37048971 PMCID: PMC10096247 DOI: 10.3390/ma16072678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 06/19/2023]
Abstract
This study aims to assess the effect of hollow glass microspheres of different sizes derived from glass industry waste on the durability and thermal behavior of waterborne paint. The coatings were characterized by electron microscopy to investigate the distribution of the spheres and their influence on the layer morphology. The impact of the various glassy spheres on the mechanical feature of the coatings was assessed using the Buchholz hardness test and the Scrub abrasion test. The role of the spheres in altering the durability of the samples was analyzed by the salt spray exposure test and the electrochemical impedance spectroscopy measurements. Finally, a specific accelerated degradation test was carried out to explore the evolution of the thermal behavior of the composite coatings. Ultimately, this work revealed the pros and cons of using hollow glass spheres as a multifunctional paint filler, highlighting the size of the spheres as a key parameter. For example, spheres with adequate size (25-44 µm), totally embedded in the polymeric matrix, are able to reduce the thermal conductivity of the coating avoiding local heat accumulation phenomena.
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Versino F, Ortega F, Monroy Y, Rivero S, López OV, García MA. Sustainable and Bio-Based Food Packaging: A Review on Past and Current Design Innovations. Foods 2023; 12:foods12051057. [PMID: 36900574 PMCID: PMC10000825 DOI: 10.3390/foods12051057] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/14/2023] [Accepted: 02/21/2023] [Indexed: 03/06/2023] Open
Abstract
Food loss and waste occur for many reasons, from crop processing to household leftovers. Even though some waste generation is unavoidable, a considerable amount is due to supply chain inefficiencies and damage during transport and handling. Packaging design and materials innovations represent real opportunities to reduce food waste within the supply chain. Besides, changes in people's lifestyles have increased the demand for high-quality, fresh, minimally processed, and ready-to-eat food products with extended shelf-life, that need to meet strict and constantly renewed food safety regulations. In this regard, accurate monitoring of food quality and spoilage is necessary to diminish both health hazards and food waste. Thus, this work provides an overview of the most recent advances in the investigation and development of food packaging materials and design with the aim to improve food chain sustainability. Enhanced barrier and surface properties as well as active materials for food conservation are reviewed. Likewise, the function, importance, current availability, and future trends of intelligent and smart packaging systems are presented, especially considering biobased sensor development by 3D printing technology. In addition, driving factors affecting fully biobased packaging design and materials development and production are discussed, considering byproducts and waste minimization and revalorization, recyclability, biodegradability, and other possible ends-of-life and their impact on product/package system sustainability.
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Affiliation(s)
- Florencia Versino
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
- Facultad de Ingeniería, Universidad Nacional de La Plata (UNLP), 47 y 115, La Plata 1900, Argentina
- Correspondence:
| | - Florencia Ortega
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), 47 y 115, La Plata 1900, Argentina
| | - Yuliana Monroy
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
| | - Sandra Rivero
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), 47 y 115, La Plata 1900, Argentina
| | - Olivia Valeria López
- Planta Piloto de Ingeniería Química (PLAPIQUI), UNS-CONICET, Camino La Carrindanga km.7, Bahía Blanca 8000, Argentina
| | - María Alejandra García
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), 47 y 115, La Plata 1900, Argentina
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Ferrari F, Striani R, Fico D, Alam MM, Greco A, Esposito Corcione C. An Overview on Wood Waste Valorization as Biopolymers and Biocomposites: Definition, Classification, Production, Properties and Applications. Polymers (Basel) 2022; 14:polym14245519. [PMID: 36559886 PMCID: PMC9787771 DOI: 10.3390/polym14245519] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Bio-based polymers, obtained from natural biomass, are nowadays considered good candidates for the replacement of traditional fossil-derived plastics. The need for substituting traditional synthetic plastics is mainly driven by many concerns about their detrimental effects on the environment and human health. The most innovative way to produce bioplastics involves the use of raw materials derived from wastes. Raw materials are of vital importance for human and animal health and due to their economic and environmental benefits. Among these, wood waste is gaining popularity as an innovative raw material for biopolymer manufacturing. On the other hand, the use of wastes as a source to produce biopolymers and biocomposites is still under development and the processing methods are currently being studied in order to reach a high reproducibility and thus increase the yield of production. This study therefore aimed to cover the current developments in the classification, manufacturing, performances and fields of application of bio-based polymers, especially focusing on wood waste sources. The work was carried out using both a descriptive and an analytical methodology: first, a description of the state of art as it exists at present was reported, then the available information was analyzed to make a critical evaluation of the results. A second way to employ wood scraps involves their use as bio-reinforcements for composites; therefore, the increase in the mechanical response obtained by the addition of wood waste in different bio-based matrices was explored in this work. Results showed an increase in Young's modulus up to 9 GPa for wood-reinforced PLA and up to 6 GPa for wood-reinforced PHA.
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Salazar-Cruz BA, Chávez-Cinco MY, Morales-Cepeda AB, Ramos-Galván CE, Rivera-Armenta JL. Evaluation of Thermal Properties of Composites Prepared from Pistachio Shell Particles Treated Chemically and Polypropylene. Molecules 2022; 27:molecules27020426. [PMID: 35056741 PMCID: PMC8780289 DOI: 10.3390/molecules27020426] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/05/2022] [Accepted: 01/05/2022] [Indexed: 11/23/2022] Open
Abstract
The purpose of the present work was to prepare polypropylene (PP) matrix composited filled with chemically treated pistachio shell particles (PTx), and evaluate their effect on the composites’ thermal properties. PP-PTx composites were formulated in different PTx content (from 2 to 10 phr) in a mixing chamber, using the melt-mixing process. The PTx were chemically treated using a NaOH solution and infrared spectroscopy (FTIR). According to thermogravimetric analysis (TGA), the treatment of pistachio shell particles resulted in the remotion of lignin and hemicellulose. The thermal stability was evaluated by means of TGA, where the presence of PTx in composites showed a positive effect compared with PP pristine. Thermal properties such as crystallization temperature (Tc), crystallization enthalpy (∆Hc), melting temperature (Tm) and crystallinity were determinate by means differential scanning calorimetry (DSC); these results suggest that the PTx had a nucleation effect on the PP matrix, increasing their crystallinity. Dynamic mechanical analysis (DMA) showed that stiffness of the composites increase compared with that PP pristine, as well as the storage modulus, and the best results were found at a PTx concentration of 4 phr. At higher concentrations, the positive effect decreased; however, they were better than the reference PP.
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