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Chandraraj SS, Suyambulingam I, Edayadulla N, Divakaran D, Singh MK, Sanjay M, Siengchin S. Characterization of Calotropis gigantiea plant leaves biomass-based bioplasticizers for biofilm applications. Heliyon 2024; 10:e33641. [PMID: 39040382 PMCID: PMC11260987 DOI: 10.1016/j.heliyon.2024.e33641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 06/24/2024] [Accepted: 06/25/2024] [Indexed: 07/24/2024] Open
Abstract
The present surge in environmental consciousness has pushed for the use of biodegradable plasticizers, which are sustainable and abundant in plant resources. As a result of their biocompatibility and biodegradability, Calotropis gigantiea leaf plasticizers (CLP) serve as viable alternatives to chemical plasticizers. First time, the natural plasticizers from the Calotropis leaves were extracted for this study using a suitable chemical approach that was also environmentally friendly. The XRD results showed a reduced crystallinity index of 20.2 % and a crystalline size of 5.3 nm, respectively. TGA study revealed that the CLP has good thermal stability (244 °C). Through FT-IR study, the existence of organic compounds in CLP can be investigated by key functional groups such as alcohol, amine, amide, hydrocarbon, alkene, aromatic, etc. Further the presence of alcoholic, amino, and carboxyl constituents was confirmed by UV investigation. SEM, EDAX analysis, and AFM are used to examine the surface morphology of the isolated plasticizer. SEM pictures reveal rough surfaces on the CLP surface pores, which makes them suitable for plasticizing new bioplastics with improved mechanical properties. Poly (butylene adipate-co-terephthalate) (PBAT), a biodegradable polymer matrix, was used to investigate the plasticization impact after the macromolecules were characterised. The biofilm PBAT/CLP had a thickness of 0.8 mm. In addition, the reinforcement interface was examined using scanning electron microscopy. When CLP is loaded differently in PBAT, the tensile strength and young modulus change from 15.30 to 24.60 MPa and from 137 to 168 MPa, respectively. CLP-reinforced films demonstrated better surface compatibility and enhanced flexibility at a loading of 2 % when compared to pure PBAT films. Considering several documented characteristics, CLP may prove to be an excellent plasticizer for resolving environmental issues in the future.
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Affiliation(s)
- Shanmuga Sundari Chandraraj
- Department of Chemistry, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, 600062, India
| | - Indran Suyambulingam
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand
| | - Naushad Edayadulla
- Department of Chemistry, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, 600062, India
| | - Divya Divakaran
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand
| | - Manoj Kumar Singh
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand
| | - M.R. Sanjay
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand
| | - Suchart Siengchin
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand
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2
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Cheran E, Sharmila Rahale C, Divyabharathi P, Viswanathan C, Narayanan L. Corn cob nanocellulose packaging for increasing the shelf life of food products. Int J Biol Macromol 2024; 268:131403. [PMID: 38614176 DOI: 10.1016/j.ijbiomac.2024.131403] [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: 07/04/2023] [Revised: 04/01/2024] [Accepted: 04/03/2024] [Indexed: 04/15/2024]
Abstract
Studies were carried out to develop eco-friendly Packaging material for the extended shelf-life of food products. The current study sought to improve the coated bioactive film's hydrophobicity and antimicrobial properties by preparing active packaging based on biodegradable Poly Lactic Acid (PLA) containing 1 wt% Nanocellulose (NC) and various loadings of essential oil-prepared nanocomposites. Nanocellulose (NC) from Maize Cob was used as filler in the synthesis of nanopolymers enriched with Thyme oil, Cinnamon oil, clove oil, and Rosemary oil. Characterization of nanopolymer-coated bags and their effect on enhancing the shelf-life of food products in different temperature conditions was also studied. The fabricated nanocomposite and nanocellulose were characterized using FTIR, SEM, XRD, Contact angle, TGA, and Tensile mechanical properties. The fabricated nanocomposite-coated paper cum bag shows good hydrophobic properties as well as antimicrobial and insecticidal properties. The results showed that adding essential oils and dispersing nanocellulose to the PLA matrix strengthened its mechanical qualities as well as its efficacy for biodegradation and antimicrobial properties. The current work provides extremely promising materials for future applications in food packaging applications using sustainable nanocomposite-based biodegradable and antimicrobial coated paper cum bags.
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Affiliation(s)
- E Cheran
- Centre For Agricultural Nanotechnology, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
| | - C Sharmila Rahale
- Centre For Agricultural Nanotechnology, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India.
| | - P Divyabharathi
- Centre For Agricultural Nanotechnology, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
| | - C Viswanathan
- Department of Nano Science & Technology, Bharathiar University, Coimbatore, Tamil Nadu, India
| | - Lakshmi Narayanan
- Department of Nano Science & Technology, Bharathiar University, Coimbatore, Tamil Nadu, India
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3
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Niewiadomski K, Szopa D, Pstrowska K, Wróbel P, Witek-Krowiak A. Comparative Analysis of Crosslinking Methods and Their Impact on the Physicochemical Properties of SA/PVA Hydrogels. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1816. [PMID: 38673173 PMCID: PMC11051402 DOI: 10.3390/ma17081816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/03/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024]
Abstract
Hydrogels, versatile materials used in various applications such as medicine, possess properties crucial for their specific applications, significantly influenced by their preparation methods. This study synthesized 18 different types of hydrogels using sodium alginate (SA) and two molecular weights of polyvinyl alcohol (PVA). Crosslinking agents such as aqueous solutions of calcium (Ca2+) and copper (Cu2+) ions and solutions of these ions in boric acid were utilized. The hydrogels were subjected to compression strength tests and drying kinetics analysis. Additionally, six hydrogel variants containing larger PVA particles underwent Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) post-drying. Some samples were lyophilized, and their surface morphology was examined using scanning electron microscopy (SEM). The results indicate that the choice of crosslinking method significantly impacts the physicochemical properties of the hydrogels. Crosslinking in solutions with higher concentrations of crosslinking ions enhanced mechanical properties and thermal stability. Conversely, using copper ions instead of calcium resulted in slower drying kinetics and reduced thermal stability. Notably, employing boric acid as a crosslinking agent for hydrogels containing heavier PVA molecules led to considerable improvements in mechanical properties and thermal stability.
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Affiliation(s)
| | | | | | | | - Anna Witek-Krowiak
- Faculty of Chemistry, Wroclaw University of Science and Technology, 27 Wybrzeze Wyspianskiego Street, 50-370 Wroclaw, Poland (D.S.); (P.W.)
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4
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Jenix Rino J, Suyambulingam I, Divakaran D, Sunesh NP, Singh MK, Vishnuvarthanan M, Sanjay MR, Siengchin S. Facile exfoliation and physicochemical characterization of Thespesia populnea plant leaves based bioplasticizer macromolecules reinforced with polylactic acid biofilms for packaging applications. Int J Biol Macromol 2024; 261:129771. [PMID: 38286386 DOI: 10.1016/j.ijbiomac.2024.129771] [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: 08/30/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 01/31/2024]
Abstract
Plasticizers are active ingredients added to the polymer to increase its workability. Since synthetic plasticizer is not ecofriendly and toxic in nature, it is a real cause for concern. On this basis, our study focuses on plasticizer extraction from plant-based resources. In this research work, Thespesia populnea leaves are utilized for the isolation of biological macromolecules with a plasticizing effect for biofilm applications. This extraction process is done through solvent extraction, amination, slow pyrolysis, and surface catalysis process. The physico-chemical and microstructural characterization of novel plasticizer particles were studied for the first time. The lower crystallinity index and crystalline size obtained from X-ray diffraction is 50.08 % and 20.45 nm respectively. Energy dispersive spectroscopy, particle sizer analysis, atomic force microscopy, and scanning electron microscopy are used to assess surface morphology of this plasticizer. The thermogram and differential thermal analysis curves give the information about degradation behavior of plasticizers and their thermal stability. The glass transition temperature of the extracted plasticizer is 60.56 °C. The plasticizing effect of the plasticizer is studied through film fabrication of polylactic acid which was blended with the extracted plasticizer. The mechanical property of biofilm was improved with the addition of plasticizer. The elongation break percentage (for 5 % plasticizer 46.12 %) was increased compared to others with moderate tensile strength. However, the tensile and elongation modulus decreases with the increase of plasticizer content. The crystallinity of the PLA film was improved after the plasticization. The thermal stability also increased with 3 % addition of the plasticizer. The isolated plasticizer was soluble in water and its molecular weight ≈380.
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Affiliation(s)
- J Jenix Rino
- Department of Mechanical Engineering, Stella Mary's College of Engineering, Nagercoil, Tamilnadu 629202, India
| | - Indran Suyambulingam
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand.
| | - Divya Divakaran
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand
| | - Narayana Perumal Sunesh
- Department of Mechanical Engineering, Rohini College of Engineering and Technology, Palkulam, Kanyakumari, Tamil Nadu 629401, India
| | - Manoj Kumar Singh
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand
| | - M Vishnuvarthanan
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - M R Sanjay
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand
| | - Suchart Siengchin
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand.
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Hanh PTH, Suwunwong T, Chantrapromma S, Choto P, Thanomsilp C, Phoungthong K. Preparation and characterization of polyvinyl alcohol (PVA)-glycerol composite films incorporating nanosilica from municipal solid waste incinerator bottom ash. Heliyon 2024; 10:e25963. [PMID: 38379987 PMCID: PMC10877291 DOI: 10.1016/j.heliyon.2024.e25963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/30/2023] [Accepted: 02/05/2024] [Indexed: 02/22/2024] Open
Abstract
This study investigates the fabrication of a composite film composed of polyvinyl alcohol (PVA) and glycerol, incorporating nanosilica derived from municipal solid waste incinerator bottom ash (BA). The nanosilica is blended with a PVA film-forming solution containing glycerol as a plasticizer. The composite films are characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Additionally, thermogravimetric analysis (TGA) is conducted to evaluate the thermal properties, while the mechanical properties are assessed in terms of tensile strength (TS) and elongation at break (EAB). The results indicate that the presence of silica nanoparticles reduces transparency and increases film thickness in the presence of glycerol. Notably, the film containing 1% silica demonstrates a significant enhancement in tensile strength, exhibiting a 50% increase compared to the film without silica. However, higher silica loadings lead to a deterioration in mechanical properties due to silica agglomeration within the polymer matrix. As expected, the presence of silica in the films slightly elevates the degradation temperature.
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Affiliation(s)
- Phan Thi Hong Hanh
- Faculty of Environmental Management, Prince of Songkla University, Songkhla, 90112, Thailand
| | - Thitipone Suwunwong
- School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Suchada Chantrapromma
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand
| | - Patcharanan Choto
- School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | | | - Khamphe Phoungthong
- Faculty of Environmental Management, Prince of Songkla University, Songkhla, 90112, Thailand
- Hub of Waste Management for Sustainable Development, Center of Excellence on Hazardous Substance Management, Chulalongkorn University, Bangkok, 10330, Thailand
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6
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Su X, Li K, Xie H, Chen Z, Li X, Wu W. Controllable hydrophilic/superhydrophobic patterned coatings for optical information encryption/decryption based on water-triggered opaque to translucent transition. J Colloid Interface Sci 2024; 654:764-773. [PMID: 37866048 DOI: 10.1016/j.jcis.2023.10.093] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/16/2023] [Accepted: 10/18/2023] [Indexed: 10/24/2023]
Abstract
Anti-counterfeiting technologies are crucial for securing the authenticity and proof of commodities, in which the optical information encryption/decryption has attracted extensive attention for its overriding advantages of visibility and convenience. Inspired by the unique transparency transformation phenomenon of Diphylleia grayi petals, a controllable hydrophilic/superhydrophobic patterned coating with water-triggered opaque to translucent transition is proposed through the construction of a superhydrophobic coating, subsequent air plasma etching under a mask, and final hydrophilic modification to introduce stable invisible patterns. The superhydrophobic region exhibits great water repellency with a water contact angle (WCA) at 157°, while the hydrophilic region quickly absorbs water with a WCA at 61°. The patterned coating presents an opaque state for the serious light scattering induced by the rough microstructure and large refractive index difference between the coating and air, while the hydrophilic patterns on the coating transform to translucent after water infiltration for the reduced roughness and close refractive indexes of the coating and water. The information revealing is rapid and reversible, and demonstrates heat and long-term stability and great reusability. The findings conceivably stand out as a new methodology to fabricate controllable superwettable coatings with optical information encryption/decryption capability for application in anti-counterfeiting.
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Affiliation(s)
- Xiaojing Su
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China.
| | - Kunquan Li
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Huali Xie
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Zhuohan Chen
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Xuanjun Li
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Wenjian Wu
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China.
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7
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Wang X, Zhang H, Zhang X, Shen C, Liu M, Liu S, Han Y, He T. A comparison study on effects of polyglycerols on physical properties of alginate films. Int J Biol Macromol 2024; 254:127879. [PMID: 37944722 DOI: 10.1016/j.ijbiomac.2023.127879] [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: 08/22/2023] [Revised: 10/25/2023] [Accepted: 11/02/2023] [Indexed: 11/12/2023]
Abstract
The water solubility and brittleness of unplasticized sodium alginate (SA) films hinder their widely application. Glycerol (GLY), the most commonly used plasticizer, is compatible with alginate due to the formation of hydrogen bonding owing to the hydroxyl functional groups. However, GLY is a small water-soluble molecule, and the resulting leaching problem may lead to decline in mechanical properties of SA films. Aimed at better plasticizers for alginate (ALG) films, this work focuses on the effects of polymerization degree of polyglycerol on physical properties of ALG films. The cross-sectional morphology, crystallinity, mechanical and thermal properties, water solubility, water content and barrier property of ALG films plasticized with GLY, triglycerol (TG) and decaglycerol (DG) were characterized and discussed. Results illustrated that owing to the long molecular chains of TG and DG and their strong interactions with ALG matrix, the plasticized films possessed better mechanical properties, higher water content and lower water solubility. Moreover, it was worth mentioning that even after water treatment, the mechanical properties of ALG-TG and ALG-DG films were superior than that plasticized with GLY. The results of this study were believed to provide particular insights into the plasticization mechanism and the improvement in performance of SA films in packaging applications.
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Affiliation(s)
- Xinglong Wang
- College of Chemistry and Chemical Engineering, Technology and Engineering Center of Multi-scale Functional Materials, Yantai University, No. 30 Qingquan Road, 264005, PR China
| | - Huiling Zhang
- College of Chemistry and Chemical Engineering, Technology and Engineering Center of Multi-scale Functional Materials, Yantai University, No. 30 Qingquan Road, 264005, PR China
| | - Xinyue Zhang
- College of Chemistry and Chemical Engineering, Technology and Engineering Center of Multi-scale Functional Materials, Yantai University, No. 30 Qingquan Road, 264005, PR China
| | - Chang Shen
- College of Chemistry and Chemical Engineering, Technology and Engineering Center of Multi-scale Functional Materials, Yantai University, No. 30 Qingquan Road, 264005, PR China
| | - Man Liu
- College of Chemistry and Chemical Engineering, Technology and Engineering Center of Multi-scale Functional Materials, Yantai University, No. 30 Qingquan Road, 264005, PR China
| | - Shanshan Liu
- College of Chemistry and Chemical Engineering, Technology and Engineering Center of Multi-scale Functional Materials, Yantai University, No. 30 Qingquan Road, 264005, PR China
| | - Yanyang Han
- College of Chemistry and Chemical Engineering, Technology and Engineering Center of Multi-scale Functional Materials, Yantai University, No. 30 Qingquan Road, 264005, PR China.
| | - Tao He
- College of Chemistry and Chemical Engineering, Technology and Engineering Center of Multi-scale Functional Materials, Yantai University, No. 30 Qingquan Road, 264005, PR China.
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Ying Y, Hu M, Han J, Yu Y, Xia X, Guo J. Water-Adaptive Microcapsules with a Brittle-Ductile-Brittle Transition Based on an O/W/O Emulsion for the Self-Healing of Cementitious Materials. ACS APPLIED MATERIALS & INTERFACES 2023; 15:47497-47508. [PMID: 37750763 DOI: 10.1021/acsami.3c10127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
Cementitious materials inevitably develop cracks, posing a serious threat to the long-term security of infrastructure, especially in the complex underground environment of cementing engineering. Microcapsules are facing the problem of encapsulated structure damage during the mixing and breaking difficultly during self-healing when applied in cementitious materials, resulting in the decline of self-healing efficiency. Herein, the calcium alginate water-adaptive microcapsules (CaAlg-NS/E-51) were prepared via an O/W/O emulsion, and the water adaptability of the shell was applied to achieve a rapid brittle-ductile transition by absorbing water. The water adaptability of the microcapsule is conducive to resisting shear stress during stirring due to the decreased elastic modulus and the increased ductility of the shell when it absorbs water. Meanwhile, the water-bearing shell loses water and becomes brittle during dry curing, making it prone to fracture when self-healing. In the self-healing measurement, the self-healing efficiency of cementitious specimens with microcapsules absorbing water for 10 min improved by 234.9 and 60.0% at 1 and 7 days, respectively, compared with those containing dry microcapsules, owing to the water adaptability of the shell.
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Affiliation(s)
- Yujie Ying
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300000, China
| | - Miaomiao Hu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300000, China
- Zhejiang Institute of Tianjin University (Shaoxing), Zhejiang 312300, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300051, China
| | - Jingmin Han
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300000, China
| | - Yongjin Yu
- CNPC Engineering Technology R&D Company Limited, Beijing 102206, China
| | - Xiujian Xia
- CNPC Engineering Technology R&D Company Limited, Beijing 102206, China
| | - Jintang Guo
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300000, China
- Zhejiang Institute of Tianjin University (Shaoxing), Zhejiang 312300, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300051, China
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Pérez Gutiérrez CL, Cottone F, Pagano C, Di Michele A, Puglia D, Luzi F, Dominici F, Sinisi R, Ricci M, Viseras Iborra CA, Perioli L. The Optimization of Pressure-Assisted Microsyringe (PAM) 3D Printing Parameters for the Development of Sustainable Starch-Based Patches. Polymers (Basel) 2023; 15:3792. [PMID: 37765648 PMCID: PMC10537393 DOI: 10.3390/polym15183792] [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: 08/27/2023] [Revised: 09/13/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
The aim of this work was to develop sustainable patches for wound application, using the biopolymer starch, created using a low-cost 3D printing PAM device. The composition of a starch gel was optimized for PAM extrusion: corn starch 10% w/w, β-glucan water suspension (filler, 1% w/w), glycerol (plasticizer, 29% w/w), and water 60% w/w. The most suitable 3D printing parameters were optimized as well (nozzle size 0.8 mm, layer height 0.2 mm, infill 100%, volumetric flow rate 3.02 mm3/s, and print speed 15 mm/s). The suitable conditions for post-printing drying were set at 37 °C for 24 h. The obtained patch was homogenous but with low mechanical resistance. To solve this problem, the starch gel was extruded over an alginate support, which, after drying, becomes an integral part of the product, constituting the backing layer of the final formulation. This approach significantly improved the physicochemical and post-printing properties of the final bilayer patch, showing suitable mechanical properties such as elastic modulus (3.80 ± 0.82 MPa), strength (0.92 ± 0.08 MPa), and deformation at break (50 ± 1%). The obtained results suggest the possibility of low-cost production of patches for wound treatment by additive manufacturing technology.
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Affiliation(s)
- Carmen Laura Pérez Gutiérrez
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy; (C.L.P.G.); (R.S.); (M.R.); (L.P.)
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain;
| | - Francesco Cottone
- Department of Physics and Geology, University of Perugia, 06123 Perugia, Italy;
| | - Cinzia Pagano
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy; (C.L.P.G.); (R.S.); (M.R.); (L.P.)
| | | | - Debora Puglia
- Civil and Environmental Engineering Department, University of Perugia, UdR INSTM, 05100 Terni, Italy; (D.P.); (F.D.)
| | - Francesca Luzi
- Department of Materials, Environmental Sciences and Urban Planning (SIMAU), 60131 Ancona, Italy;
| | - Franco Dominici
- Civil and Environmental Engineering Department, University of Perugia, UdR INSTM, 05100 Terni, Italy; (D.P.); (F.D.)
| | - Rossella Sinisi
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy; (C.L.P.G.); (R.S.); (M.R.); (L.P.)
| | - Maurizio Ricci
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy; (C.L.P.G.); (R.S.); (M.R.); (L.P.)
| | - César Antonio Viseras Iborra
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain;
| | - Luana Perioli
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy; (C.L.P.G.); (R.S.); (M.R.); (L.P.)
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Trodtfeld F, Tölke T, Wiegand C. Developing a Prolamin-Based Gel for Food Packaging: In-Vitro Assessment of Cytocompatibility. Gels 2023; 9:740. [PMID: 37754421 PMCID: PMC10531018 DOI: 10.3390/gels9090740] [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: 08/17/2023] [Revised: 09/08/2023] [Accepted: 09/10/2023] [Indexed: 09/28/2023] Open
Abstract
Growing environmental concerns drive efforts to reduce packaging waste by adopting biodegradable polymers, coatings, and films. However, biodegradable materials used in packaging face challenges related to barrier properties, mechanical strength, and processing compatibility. A composite gel was developed using biodegradable compounds (prolamin, d-mannose, citric acid), as a coating to increase the oxygen barrier of food packaging materials. To improve gel stability and mechanical properties, the gels were physically cross-linked with particles synthesized from tetraethyl orthosilicate and tetramethyl orthosilicate precursors. Additionally, biocompatibility assessments were performed on human keratinocytes and fibroblasts, demonstrating the safety of the gels for consumer contact. The gel properties were characterized, including molecular structure, morphology, and topography. Biocompatibility of the gels was assessed using bioluminescent ATP assay to detect cell viability, lactate dehydrogenase assay to determine cell cytotoxicity, and a leukocyte stimulation test to detect inflammatory potential. A composite gel with strong oxygen barrier properties in low-humidity environments was prepared. Increasing the silane precursor to 50 wt% during gel preparation slowed degradation in water. The addition of citric acid decreased gel solubility. However, higher precursor amounts increased surface roughness, making the gel more brittle yet mechanically resistant. The increase of precursor in the gel also increased gel viscosity. Importantly, the gels showed no cytotoxicity on human keratinocytes or fibroblasts and had no inflammatory effects on leukocytes. This composite gel holds promise for oxygen barrier food packaging and is safe for consumer contact. Further research should focus on optimizing the stability of the oxygen barrier in humid environments and investigate the potential sensitizing effects of biodegradable materials on consumers.
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Affiliation(s)
- Franziska Trodtfeld
- Department of Dermatology, Jena University Hospital, Friedrich Schiller University Jena, Am Klinikum 1, D-07747 Jena, Germany
- INNOVENT e.V., Prüssingstraße 27 B, D-07745 Jena, Germany;
| | - Tina Tölke
- INNOVENT e.V., Prüssingstraße 27 B, D-07745 Jena, Germany;
| | - Cornelia Wiegand
- Department of Dermatology, Jena University Hospital, Friedrich Schiller University Jena, Am Klinikum 1, D-07747 Jena, Germany
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11
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Campelo MDS, Mota LB, Câmara Neto JF, Barbosa MLL, Gonzaga MLDC, Leal LKAM, Bastos MDSR, Soares SDA, Ricardo NMPS, Cerqueira GS, Ribeiro MENP. Agaricus blazei Murill extract-loaded in alginate/poly(vinyl alcohol) films prepared by Ca 2+ cross-linking for wound healing applications. J Biomed Mater Res B Appl Biomater 2023; 111:1035-1047. [PMID: 36455230 DOI: 10.1002/jbm.b.35212] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 11/08/2022] [Accepted: 11/23/2022] [Indexed: 12/02/2022]
Abstract
This work aimed the development and evaluation of the wound healing activity of films based on sodium alginate, polyvinyl alcohol (PVA) and Ca2+ loaded with Agaricus blazei Murill hydroalcoholic extract (AbE). Firstly, AbE was prepared using a previously standardized methodology. The films were prepared by casting technique and cross-linked with Ca2+ using CaCl2 as cross-linking agent. The physicochemical, morphological and water vapor barrier properties of the films were analyzed and the pre-clinical efficacy was investigated against the cutaneous wound model in mice. The films showed barrier properties to water vapor promising for wound healing. AbE showed physical and chemical interactions between both polymers, noticed by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermal analysis. The delivery of AbE in alginate/PVA films enhanced the antioxidant and wound healing properties of these polymers. Consequently, a reduction of malondialdehyde levels was observed, as well as an increase of the epidermis/dermis thickness and enhancement in collagen I deposition. Thus, these formulations are promising biomaterials for wound care and tissue repairing.
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Affiliation(s)
- Matheus da Silva Campelo
- Laboratório de Polímeros e Inovação de Materiais, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Fortaleza, Brazil.,Centro de Estudos Farmacêuticos e Cosméticos, Departamento de Farmácia, Universidade Federal do Ceará, Fortaleza, Brazil
| | - Lucas Barroso Mota
- Laboratório de Polímeros e Inovação de Materiais, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Fortaleza, Brazil
| | - João Francisco Câmara Neto
- Laboratório de Polímeros e Inovação de Materiais, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Fortaleza, Brazil
| | - Maria Lucianny Lima Barbosa
- Núcleo de Estudos em Microscopia e Processamento de Imagens, Departamento de Morfologia, Universidade Federal do Ceará, Fortaleza, Brazil
| | - Maria Leônia da Costa Gonzaga
- Laboratório de Polímeros e Inovação de Materiais, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Fortaleza, Brazil.,Laboratório de Tecnologia de Embalagens de Alimentos, Embrapa Agroindústria Tropical, Fortaleza, Brazil
| | | | | | - Sandra de Aguiar Soares
- Laboratório de Polímeros e Inovação de Materiais, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Fortaleza, Brazil
| | - Nágila Maria Pontes Silva Ricardo
- Laboratório de Polímeros e Inovação de Materiais, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Fortaleza, Brazil
| | - Gilberto Santos Cerqueira
- Núcleo de Estudos em Microscopia e Processamento de Imagens, Departamento de Morfologia, Universidade Federal do Ceará, Fortaleza, Brazil
| | - Maria Elenir Nobre Pinho Ribeiro
- Laboratório de Polímeros e Inovação de Materiais, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Fortaleza, Brazil.,Núcleo de Estudos em Microscopia e Processamento de Imagens, Departamento de Morfologia, Universidade Federal do Ceará, Fortaleza, Brazil
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12
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Green and recyclable graphitic carbon nitride/chitosan/polyvinyl alcohol photocatalytic films with efficient antibacterial activity for fruit packaging. Int J Biol Macromol 2023; 236:123974. [PMID: 36898454 DOI: 10.1016/j.ijbiomac.2023.123974] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/25/2023] [Accepted: 03/04/2023] [Indexed: 03/12/2023]
Abstract
Chitosan (CS) is an excellent raw material for the preparation of food packaging films due to its good film-forming properties, non-toxicity, and biodegradability. However, pure chitosan films have drawbacks such as weak mechanical properties and limited antimicrobial activity. In this work, novel food packaging films containing chitosan, polyvinyl alcohol (PVA) and porous graphitic carbon nitride (g-C3N4) were successfully prepared. The PVA served to improve the mechanical properties of the chitosan-based films, whilst the porous g-C3N4 acted as a photocatalytically-active antibacterial agent. The tensile strength (TS) and elongation at break (EAB) of the g-C3N4/CS/PVA films both increased by ~4 times compared to the pristine CS/PVA films at the optimum g-C3N4 loading of ~10 wt%. The addition of g-C3N4 increase the water contact angle (WCA) of the films from 38° to 50°, whilst decreasing the water vapor permeability (WVP) from 160 × 10-12 to 135 × 10-12 g∙Pa-1 s-1 m-1. The shelf life of strawberries covered with g-C3N4/CS/PVA films at room temperature could be extended up to 96 h, compared to 48 h and 72 h for strawberries covered with polyethylene (PE) films or CS/PVA films, respectively. The g-C3N4/CS/PVA films offered good antibacterial properties against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). Further, the composite films could be easily recycled with the regenerated films offering almost identical mechanical properties and activities as the original films. The prepared g-C3N4/CS/PVA films thus offer promise for low-cost antimicrobial packaging applications.
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13
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Saraiva MM, Campelo MDS, Câmara Neto JF, Lima ABN, Silva GDA, Dias ATDFF, Ricardo NMPS, Kaplan DL, Ribeiro MENP. Alginate/polyvinyl alcohol films for wound healing: Advantages and challenges. J Biomed Mater Res B Appl Biomater 2023; 111:220-233. [PMID: 35959858 DOI: 10.1002/jbm.b.35146] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 07/08/2022] [Accepted: 07/25/2022] [Indexed: 11/06/2022]
Abstract
The skin is the largest organ in the human body and its physical integrity must be maintained for body homeostasis and to prevent the entry of pathogenic microorganisms. Sodium alginate (SA) and polyvinyl alcohol (PVA) are two polymers widely used in films for wound dressing applications. Furthermore, blends between SA and PVA improve physical, mechanical and biological properties of the final wound healing material when compared to the individual polymers. Different drugs have been incorporated into SA/PVA-based films to improve wound healing activity. It is noteworthy that SA/PVA films can be crosslinked with Ca2+ or other agents, which improves physicochemical and biological properties. Thus, SA/PVA associations are promising for the biomedical field, as a potential alternative for wound treatment. This review focuses on the main techniques for obtaining SA/PVA films, their physical-chemical characterization, drug incorporation, and the advantages and challenges of these films for wound healing.
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Affiliation(s)
- Matheus Morais Saraiva
- Department of Organic and Inorganic Chemistry, Sciences Center, Laboratory of Polymers and Materials Innovation, Federal University of Ceará, Fortaleza, Brazil
| | - Matheus da Silva Campelo
- Department of Organic and Inorganic Chemistry, Sciences Center, Laboratory of Polymers and Materials Innovation, Federal University of Ceará, Fortaleza, Brazil
| | - João Francisco Câmara Neto
- Department of Organic and Inorganic Chemistry, Sciences Center, Laboratory of Polymers and Materials Innovation, Federal University of Ceará, Fortaleza, Brazil
| | - Ana Beatriz Nogueira Lima
- Department of Organic and Inorganic Chemistry, Sciences Center, Laboratory of Polymers and Materials Innovation, Federal University of Ceará, Fortaleza, Brazil
| | - George de Almeida Silva
- Department of Organic and Inorganic Chemistry, Sciences Center, Laboratory of Polymers and Materials Innovation, Federal University of Ceará, Fortaleza, Brazil
| | - Andre Tavares de Freitas Figueredo Dias
- Department of Organic and Inorganic Chemistry, Sciences Center, Laboratory of Polymers and Materials Innovation, Federal University of Ceará, Fortaleza, Brazil
| | - Nágila Maria Pontes Silva Ricardo
- Department of Organic and Inorganic Chemistry, Sciences Center, Laboratory of Polymers and Materials Innovation, Federal University of Ceará, Fortaleza, Brazil
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, USA
| | - Maria Elenir Nobre Pinho Ribeiro
- Department of Organic and Inorganic Chemistry, Sciences Center, Laboratory of Polymers and Materials Innovation, Federal University of Ceará, Fortaleza, Brazil
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14
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Role of silica (SiO2) nano/micro-particles in the functionality of degradable packaging films/coatings and their application in food preservation. Trends Food Sci Technol 2023. [DOI: 10.1016/j.tifs.2023.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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15
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Cui Y, Zhang R, Cheng M, Guo Y, Wang X. Sustained release and antioxidant activity of active potato starch packaging films encapsulating thymol with MCM-41. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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16
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Guo Y, Cheng M, Cui Y, Zhang R, Zhao Z, Wang X, Guo S. Effect of SBA-15-CEO on properties of potato starch film modified by low-temperature plasma. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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17
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Guo Y, Cui Y, Cheng M, Zhang R, Zhao Z, Wang X, Guo S. Development and properties of active films based on potato starch modified by low-temperature plasma and enriched with cinnamon essential oil coated with nanoparticles. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Zhong X, Tian P, Chen C, Meng X, Mi H, Shi F. Preparation and Interface Stability of Alginate-based Gel Polymer Electrolyte for Rechargeable Aqueous Zinc Ion Batteries. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Ning H, Lu L, Xu J, Lu L, Pan L, Lin Z. Development of sodium alginate-based antioxidant and antibacterial bioactive films added with IRMOF-3/Carvacrol. Carbohydr Polym 2022; 292:119682. [PMID: 35725175 DOI: 10.1016/j.carbpol.2022.119682] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 05/05/2022] [Accepted: 05/29/2022] [Indexed: 11/02/2022]
Abstract
The purpose of this study was to compare the effects of different concentrations of the amine-functionalized isoreticular metal-organic framework-3 loaded with carvacrol (IRMOF-3/CA) on the properties of sodium alginate (SA) composite films, thus determining the optimal addition amount and further preparing bioactive packaging film with antibacterial and antioxidant activities. The morphology, structure, physical properties, antioxidant and antibacterial activities of the films were characterized and analyzed. The results showed that the thermal stability and light barrier property of the films were improved by the addition of IRMOF-3/CA. When the additional concentration was 0.4 wt%, the tensile, water vapor barrier and hydrophobic properties of the films were increased by 30.13%, 9.06% and 46.43% respectively compared with those of pure SA film. Moreover, the film added with IRMOF-3/CA had sustained antioxidant and antibacterial activities, and had an apparent fresh-keeping effect on pork, suggesting its application potential in food packaging.
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Affiliation(s)
- Haoyue Ning
- Department of Packaging Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Lixin Lu
- Department of Packaging Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology, Wuxi, Jiangsu 214122, China.
| | - Jing Xu
- Department of Packaging Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Lijing Lu
- Department of Packaging Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology, Wuxi, Jiangsu 214122, China
| | - Liao Pan
- Department of Packaging Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology, Wuxi, Jiangsu 214122, China
| | - Zidong Lin
- Shandong Bihai Packaging Materials Co. LTD, Linyi, Shandong 276600, China
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20
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Cui Y, Zhang R, Wang L, Cheng M, Guo Y, Wang X. Quantitative study on release kinetics of thymol in food packaging films. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2022.111307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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21
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Cui Y, Wang X, Cheng M, Zhang R, Wang L, Han M, Guo Y. Characterization and release kinetics model of thymol from starch-based nanocomposite film into food simulator. J Food Biochem 2022; 46:e14326. [PMID: 35894224 DOI: 10.1111/jfbc.14326] [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: 04/30/2022] [Revised: 06/23/2022] [Accepted: 07/05/2022] [Indexed: 11/29/2022]
Abstract
To improve the performance of potato starch films and solve the problems of high volatility and low stability of thymol (Thy), thymol was loaded into the channel of SBA-15 to prepare Thy-SBA-15, and the Thy-SBA-15/potato starch film was prepared. The results showed thymol was successfully loaded into the pores of SBA-15. The addition of Thy-SBA-15 enhanced the tensile strength of potato starch film (3.93 Mpa), reduced the water vapor permeability (1.56 × 10-12 g·d-1 m-1 Pa-1 , WVP) and moisture absorption (80.97%, MA), which enhanced the barrier properties of the films. Thy-SBA-15 had good compatibility with potato starch films. Notably, the thymol released from Thy-SBA-15/potato starch film was initially explosive, and then continuous, which showed this film could effectively slow down the release rate of thymol and prolong the fresh-keeping period of food. The Korsmeyer-Peppas model M t M ∞ = k t n $$ \left(\frac{{\mathrm{M}}_{\mathrm{t}}}{{\mathrm{M}}_{\infty }}=\mathrm{k}{\mathrm{t}}^{\mathrm{n}}\right) $$ (R2 > .96) had the best fit for the release curve of thymol. PRACTICAL APPLICATIONS: This work offers a new method for the preparation of potato starch sustained-release antibacterial film, and provides a theoretical basis and technical support for the development of intelligent packaging.
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Affiliation(s)
- Yingjun Cui
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, China
| | - Xiangyou Wang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, China
| | - Meng Cheng
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, China
| | - Rongfei Zhang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, China
| | - Liang Wang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, China
| | - Minjie Han
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, China
| | - Yanli Guo
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, China
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22
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Bora D, Jayaramudu J, Saikia P, Bohra RC, Phukan L, S PS, Ray SS, Sadiku E. Effect of boehmite alumina nanoparticles on the physical and chemical characteristics of eco-friendly sodium alginate/polyvinyl alcohol bio-nanocomposite film. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2022. [DOI: 10.1080/1023666x.2022.2061749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Dipjyoti Bora
- Polymer, Petroleum and Coal Chemistry Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam, India
- Academy of Scientific and Innovative Research, (AcSIR) Ghaziabad, India
| | - J. Jayaramudu
- Polymer, Petroleum and Coal Chemistry Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam, India
- Academy of Scientific and Innovative Research, (AcSIR) Ghaziabad, India
| | - Prasenjit Saikia
- Polymer, Petroleum and Coal Chemistry Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam, India
- Academy of Scientific and Innovative Research, (AcSIR) Ghaziabad, India
| | - Ramesh C. Bohra
- Polymer, Petroleum and Coal Chemistry Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam, India
- Academy of Scientific and Innovative Research, (AcSIR) Ghaziabad, India
| | - Lachit Phukan
- Polymer, Petroleum and Coal Chemistry Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam, India
- Academy of Scientific and Innovative Research, (AcSIR) Ghaziabad, India
| | - Periyar Selvam S
- Department of Food Process Engineering, Postharvest Research Lab, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, India
| | - S. S. Ray
- Centre for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre, Council for Scientific and Industrial Research, Pretoria, South Africa
| | - E.R. Sadiku
- Tshwane University of Technology, Department of Chemical, Metallurgical and Materials Engineering (Polymer Division), Pretoria, South Africa
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23
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Hurtado A, Aljabali AAA, Mishra V, Tambuwala MM, Serrano-Aroca Á. Alginate: Enhancement Strategies for Advanced Applications. Int J Mol Sci 2022; 23:ijms23094486. [PMID: 35562876 PMCID: PMC9102972 DOI: 10.3390/ijms23094486] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 04/14/2022] [Accepted: 04/17/2022] [Indexed: 02/06/2023] Open
Abstract
Alginate is an excellent biodegradable and renewable material that is already used for a broad range of industrial applications, including advanced fields, such as biomedicine and bioengineering, due to its excellent biodegradable and biocompatible properties. This biopolymer can be produced from brown algae or a microorganism culture. This review presents the principles, chemical structures, gelation properties, chemical interactions, production, sterilization, purification, types, and alginate-based hydrogels developed so far. We present all of the advanced strategies used to remarkably enhance this biopolymer’s physicochemical and biological characteristics in various forms, such as injectable gels, fibers, films, hydrogels, and scaffolds. Thus, we present here all of the material engineering enhancement approaches achieved so far in this biopolymer in terms of mechanical reinforcement, thermal and electrical performance, wettability, water sorption and diffusion, antimicrobial activity, in vivo and in vitro biological behavior, including toxicity, cell adhesion, proliferation, and differentiation, immunological response, biodegradation, porosity, and its use as scaffolds for tissue engineering applications. These improvements to overcome the drawbacks of the alginate biopolymer could exponentially increase the significant number of alginate applications that go from the paper industry to the bioprinting of organs.
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Affiliation(s)
- Alejandro Hurtado
- Biomaterials and Bioengineering Laboratory, Centro de Investigación Traslacional San Alberto Magno, Universidad Católica de Valencia San Vicente Mártir, c/Guillem de Castro 94, 46001 Valencia, Spain;
| | - Alaa A. A. Aljabali
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Yarmouk University, Irbid 21163, Jordan;
| | - Vijay Mishra
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India;
| | - Murtaza M. Tambuwala
- School of Pharmacy and Pharmaceutical Science, Ulster University, Coleraine BT52 1SA, Northern Ireland, UK;
| | - Ángel Serrano-Aroca
- Biomaterials and Bioengineering Laboratory, Centro de Investigación Traslacional San Alberto Magno, Universidad Católica de Valencia San Vicente Mártir, c/Guillem de Castro 94, 46001 Valencia, Spain;
- Correspondence:
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24
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Synthesis and characterization of a new meso-tetrakis (2,4,6-trimethylphenyl) porphyrinto) zinc(II) supported sodium alginate gel beads for improved adsorption of methylene blue dye. Int J Biol Macromol 2022; 202:161-176. [PMID: 35045344 DOI: 10.1016/j.ijbiomac.2022.01.087] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/01/2022] [Accepted: 01/12/2022] [Indexed: 11/22/2022]
Abstract
Chemical modification of a biopolymer offers a simple strategy to realize new materials with added benefits. In this paper, meso-tetrakis(2,4,6-trimethylphenyl) porphyrinto) zinc(II) supported sodium alginate gel beads were successfully prepared, characterized, and used for the removal of a cationic dye from aqueous solution. The chemical structure of the prepared composite beads was confirmed by FT-IR, SEM, XRD and TGA/DTG techniques. Analytical data suggested that the sodium alginate beads and meso-tetrakis(2,4,6-trimethylphenyl) porphyrinto) zinc(II) complex interacted via non-covalent interaction (H-bonding) mode. The morphological micrographs showed spherical and smooth composite beads. The crosslinking of hydroxyl and carboxylate groups of the biopolymer with calcium ions and the incorporation of meso-tetrakis(2,4,6-trimethylphenyl) porphyrinto) zinc(II) into alginate matrix resulted in a small decrease of residual mass. The maximum adsorption capacities of methylene blue, at 20 °C, were found to be 52.3 mg/g and 34.8 mg/g for sodium alginate composite beads (3%) and plain sodium alginate beads, respectively. The adsorption process followed Freundlich isotherm and pseudo second order kinetics. The thermodynamic study displayed an exothermic and non-spontaneous process.
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25
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Marangoni Júnior L, Silva RGD, Vieira RP, Alves RMV. Water vapor sorption and permeability of sustainable alginate/collagen/SiO2 composite films. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.112261] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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26
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Tian B, Xu D, Cheng J, Liu Y. Chitosan-silica with hops β-acids added films as prospective food packaging materials: Preparation, characterization, and properties. Carbohydr Polym 2021; 272:118457. [PMID: 34420717 DOI: 10.1016/j.carbpol.2021.118457] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 07/04/2021] [Accepted: 07/15/2021] [Indexed: 12/12/2022]
Abstract
In this study, silica (SiO2) and β-acids were added to the chitosan films in order to improve the film's properties. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction analysis (XRD) were used to explore the structure of film. The results of mechanical test indicated that the film containing SiO2 (0.3%) and β-acids (0.3%) could obtain a significant tensile strength (10.04 MPa). The complex films possessed a good inhibitory effect on three types of bacteria, and good antioxidant activity (>56%, DPPH). The release mechanism of β-acids from the films exhibited Fickian diffusion (n < 0.45). During the storage of soybean oil, the films could well control the changes of the peroxide value, acid value and thiobarbituric acid reactant content. Overall, the biofilms not only possess good physical and chemical properties, but also prolongs the time of food storage.
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Affiliation(s)
- Bingren Tian
- School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
| | - Dan Xu
- College of Chemistry, Xinjiang University, Urumqi 830046, China
| | - Jianhua Cheng
- College of Chemistry, Xinjiang University, Urumqi 830046, China
| | - Yumei Liu
- School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China.
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27
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Terreni E, Chetoni P, Burgalassi S, Tampucci S, Zucchetti E, Chipala E, Alany RG, Al-Kinani AA, Monti D. A hybrid ocular delivery system of cyclosporine-A comprising nanomicelle-laden polymeric inserts with improved efficacy and tolerability. Biomater Sci 2021; 9:8235-8248. [PMID: 34753159 DOI: 10.1039/d1bm01453f] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report on hybrid nanomicelle-polymer inserts for improved delivery of cyclosporine A (CyA) to the surface of the eye. Hybrid inserts containing a nanomicellar formulation were prepared by the solvent casting method; their characteristics, in vitro release of CyA, eye irritation potential, nanomicelle distribution inside the insert, and in vivo pharmacokinetics of the most promising solid formulation (F3) were investigated. Nanomicelles capable of accommodating a therapeutically relevant amount of CyA (57.22 ± 5.90-68.52 ± 1.4 μg) were incorporated into five different polymeric formulations (F1-F5). The developed inserts displayed promising characteristics (size, weight, surface pH, and contact angle) that fulfill ocular tolerability requirements. Considering the technological properties and CyA in vitro release, F3 and F5 were the most promising formulations. SEM analysis suggested the F3 formulation as the potential prototype for CyA ocular delivery. The F3 formulation (CyA: 60.08 ± 2.85 μg) did not induce conjunctival irritation when HET-CAM assay was performed and was hence considered suitable for further study in a rabbit eye. The AUC value for CyA loaded in the F3 insert was about 2-fold greater than that obtained with the Ikervis® used as a control formulation. F3 produced a significant reduction (of about 7-folds) in the rate of CyA elimination from the tear fluid relative to Ikervis® and about 4-fold greater reduction than Nano-CyA (p = 0.0187). The ability of F3 to delay the elimination of the drug from the precorneal area is particularly desirable when treating dry eye syndrome. Furthermore, F3 did not induce ocular discomfort, a typical characteristic of solid ocular inserts, including commercially available ones.
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Affiliation(s)
| | - Patrizia Chetoni
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy. .,Inter-University Centre for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56126, Pisa, Italy
| | - Susi Burgalassi
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy. .,Inter-University Centre for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56126, Pisa, Italy
| | - Silvia Tampucci
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy. .,Inter-University Centre for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56126, Pisa, Italy
| | - Erica Zucchetti
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy.
| | - Edwin Chipala
- Drug Discovery, Delivery, and Patient Care (DDDPC) Research Group, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames, London, KT12EE, UK. .,Pharmacy and Medicines Regulatory Authority, 30241, Lilongwe, Malawi
| | - Raid G Alany
- Drug Discovery, Delivery, and Patient Care (DDDPC) Research Group, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames, London, KT12EE, UK. .,School of Pharmacy, The University of Auckland, Auckland, 1023, New Zealand
| | - Ali A Al-Kinani
- Drug Discovery, Delivery, and Patient Care (DDDPC) Research Group, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames, London, KT12EE, UK.
| | - Daniela Monti
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy. .,Inter-University Centre for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56126, Pisa, Italy
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The Effect of Glycerin Content in Sodium Alginate/Poly(vinyl alcohol)-Based Hydrogels for Wound Dressing Application. Int J Mol Sci 2021; 22:ijms222112022. [PMID: 34769449 PMCID: PMC8584732 DOI: 10.3390/ijms222112022] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/25/2021] [Accepted: 11/02/2021] [Indexed: 02/06/2023] Open
Abstract
The impact of different amounts of glycerin, which was used in the system of sodium alginate/poly(vinyl alcohol) (SA/PVA) hydrogel materials on the properties, such as gel fraction, swelling ability, degradation in simulated body fluids, morphological analysis, and elongation tests were presented. The study shows a significant decrease in the gel fraction from 80.5 ± 2.1% to 45.0 ± 1.2% with the increase of glycerin content. The T5 values of the tested hydrogels were varied and range from 88.7 °C to 161.5 °C. The presence of glycerin in the matrices significantly decreased the thermal resistance, which was especially visible by T10 changes (273.9 to 163.5 °C). The degradation tests indicate that most of the tested materials do not degrade throughout the incubation period and maintain a constant ion level after 7-day incubation. The swelling abilities in distilled water and phosphate buffer solution are approximately 200-300%. However, we noticed that these values decrease with the increase in glycerin content. All tested matrices are characterized by the maximum elongation rate at break in a range of 37.6-69.5%. The FT-IR analysis exhibits glycerin changes in hydrogel structures, which is associated with the cross-linking reaction. Additionally, cytotoxicity results indicate good adhesion properties and no toxicity towards normal human dermal fibroblasts.
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Development of antioxidant and antimicrobial bioactive films based on Oregano essential oil/mesoporous nano-silica/sodium alginate. Food Packag Shelf Life 2021. [DOI: 10.1016/j.fpsl.2021.100691] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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30
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Marangoni Júnior L, da Silva RG, Anjos CAR, Vieira RP, Alves RMV. Effect of low concentrations of SiO 2 nanoparticles on the physical and chemical properties of sodium alginate-based films. Carbohydr Polym 2021; 269:118286. [PMID: 34294312 DOI: 10.1016/j.carbpol.2021.118286] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/08/2021] [Accepted: 05/29/2021] [Indexed: 10/21/2022]
Abstract
This work investigated the effect of adding low concentrations of nano-SiO2 (0.5, 1.0 and 1.5%) in the properties of films based on sodium alginate, to identify lower thresholds in the proportion of the reinforcing agent. It was found that, even in the smallest proportion, thermal stability of the nanocomposites improved significantly (with degradation onset increased by almost 15% compared with the control film). The surface morphology showed pronounced roughness at nano-SiO2 concentrations greater than 1.0%, indicating agglomeration of part of the nanomaterial. Mechanical properties were reduced for the samples with concentrations equal to 1.0 and 1.5%, however, without significant differences between them. Conversely, water vapor and light barrier properties have not undergone significant changes in any formulation. Therefore, the use of 0.5% nano-SiO2 in alginate films would be an easy and economically interesting way to improve thermal stability, without significantly reducing mechanical properties of the pure material.
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Affiliation(s)
- Luís Marangoni Júnior
- Packaging Technology Center, Institute of Food Technology, Campinas, São Paulo, Brazil; Department of Food Engineering and Technology, School of Food Engineering, University of Campinas, Campinas, São Paulo, Brazil.
| | - Renan Garcia da Silva
- Packaging Technology Center, Institute of Food Technology, Campinas, São Paulo, Brazil; Department of Bioprocess and Materials Engineering, School of Chemical Engineering, University of Campinas, Campinas, São Paulo, Brazil
| | - Carlos Alberto Rodrigues Anjos
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas, Campinas, São Paulo, Brazil
| | - Roniérik Pioli Vieira
- Department of Bioprocess and Materials Engineering, School of Chemical Engineering, University of Campinas, Campinas, São Paulo, Brazil
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31
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Bialik-Wąs K, Królicka E, Malina D. Impact of the Type of Crosslinking Agents on the Properties of Modified Sodium Alginate/Poly(vinyl Alcohol) Hydrogels. Molecules 2021; 26:2381. [PMID: 33921906 PMCID: PMC8072894 DOI: 10.3390/molecules26082381] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/16/2021] [Accepted: 04/17/2021] [Indexed: 12/23/2022] Open
Abstract
Here, we report on studies on the influence of different crosslinking methods (ionic and chemical) on the physicochemical (swelling ability and degradation in simulated body fluids), structural (FT-IR spectra analysis) and morphological (SEM analysis) properties of SA/PVA hydrogels containing active substances of natural origin. First, an aqueous extract of Echinacea purpurea was prepared using a Soxhlet apparatus. Next, a series of modified SA/PVA-based hydrogels were obtained through the chemical crosslinking method using poly(ethylene glycol) diacrylate (PEGDA, Mn = 700 g/mol) as a crosslinking agent and, additionally, the ionic reaction in the presence of a 5% w/v calcium chloride solution. The compositions of SA/PVA/E. purpurea-based hydrogels contained a polymer of natural origin-sodium alginate (SA, 1.5% solution)-and a synthetic polymer-poly(vinyl alcohol) (PVA, Mn = 72,000 g/mol, 10% solution)-in the ratio 2:1, and different amounts of the aqueous extract of E. purpurea-5, 10, 15 or 20% (v/v). Additionally, the release behavior of echinacoside from the polymeric matrix was evaluated in phosphate-buffered saline (PBS) at 37 °C. The results indicate that the type of the crosslinking method has a direct impact on the release profile. Consequently, it is possible to design a system that delivers an active substance in a way that depends on the application.
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Affiliation(s)
- Katarzyna Bialik-Wąs
- Department of Organic Chemistry and Technology, Faculty of Chemical Engineering and Technology, Cracow University of Technology, 24 Warszawska St., 31-155 Cracow, Poland;
| | - Ewelina Królicka
- Department of Organic Chemistry and Technology, Faculty of Chemical Engineering and Technology, Cracow University of Technology, 24 Warszawska St., 31-155 Cracow, Poland;
| | - Dagmara Malina
- Department of Chemical Technology and Environmental Analytics, Faculty of Chemical Engineering and Technology, Cracow University of Technology, 24 Warszawska St., 31-155 Cracow, Poland;
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32
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Guastaferro M, Reverchon E, Baldino L. Polysaccharide-Based Aerogel Production for Biomedical Applications: A Comparative Review. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1631. [PMID: 33810582 PMCID: PMC8037187 DOI: 10.3390/ma14071631] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 03/21/2021] [Accepted: 03/24/2021] [Indexed: 12/11/2022]
Abstract
A comparative analysis concerning bio-based gels production, to be used for tissue regeneration, has been performed in this review. These gels are generally applied as scaffolds in the biomedical field, thanks to their morphology, low cytotoxicity, and high biocompatibility. Focusing on the time interval 2015-2020, the production of 3D scaffolds of alginate, chitosan and agarose, for skin and bone regeneration, has mainly been investigated. Traditional techniques are critically reviewed to understand their limitations and how supercritical CO2-assisted processes could overcome these drawbacks. In particular, even if freeze-drying represents the most widespread drying technique used to produce polysaccharide-based cryogels, supercritical CO2-assisted drying effectively allows preservation of the nanoporous aerogel structure and removes the organic solvent used for gel preparation. These characteristics are essential for cell adhesion and proliferation.
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Affiliation(s)
| | | | - Lucia Baldino
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy; (M.G.); (E.R.)
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33
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Qureshi D, Pattanaik S, Mohanty B, Anis A, Kulikouskaya V, Hileuskaya K, Agabekov V, Sarkar P, Maji S, Pal K. Preparation of novel poly(vinyl alcohol)/chitosan lactate-based phase-separated composite films for UV-shielding and drug delivery applications. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03653-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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34
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Naidu DS, John MJ. Cellulose nanofibrils reinforced xylan-alginate composites: Mechanical, thermal and barrier properties. Int J Biol Macromol 2021; 179:448-456. [PMID: 33711367 DOI: 10.1016/j.ijbiomac.2021.03.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 03/04/2021] [Accepted: 03/04/2021] [Indexed: 02/03/2023]
Abstract
Cellulose nanofibrils (CNFs) can be used as an effective reinforcement material for biopolymer films intended for food packaging applications. The aim of this study was to improve the mechanical and barrier properties of xylan-alginate films by incorporating CNFs into the xylan-alginate matrix. CNFs was produced from maize stalk waste residues through a combination of chemical and mechanical treatment. The CNFs was incorporated into the xylan-alginate matrix between 1 and 10 wt%. The suitability of the CNFs reinforced composite films for food packaging applications was investigated by testing the mechanical, thermal and optical properties as well as the moisture sorption, solubility and water vapour permeability of the films. The CNFs produced had fibre diameters between 10 and 80 nm and transmission electron microscopy images showed that the CNFs were highly entangled hence forming a web like structure. It was found that the incorporation of CNFs into the xylan-alginate matrix increased the tensile strength and Young's modulus of the films. The incorporation of CNFs improved the WVP of the films but did not show any significant effect on the thermal properties of the films.
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Affiliation(s)
- Darrel Sarvesh Naidu
- Centre for Nanostructures and Advanced Materials, CSIR, South Africa; Department of Chemistry, Nelson Mandela University, Port Elizabeth, South Africa
| | - Maya Jacob John
- Centre for Nanostructures and Advanced Materials, CSIR, South Africa; Department of Chemistry, Nelson Mandela University, Port Elizabeth, South Africa.
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35
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Bilal M, Gul I, Basharat A, Qamar SA. Polysaccharides-based bio-nanostructures and their potential food applications. Int J Biol Macromol 2021; 176:540-557. [PMID: 33607134 DOI: 10.1016/j.ijbiomac.2021.02.107] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 02/13/2021] [Accepted: 02/14/2021] [Indexed: 12/11/2022]
Abstract
Polysaccharides are omnipresent biomolecules that hold great potential as promising biomaterials for a myriad of applications in various biotechnological and industrial sectors. The presence of diverse functional groups renders them tailorable functionalities for preparing a multitude of novel bio-nanostructures. Further, they are biocompatible and biodegradable, hence, considered as environmentally friendly biopolymers. Application of nanotechnology in food science has shown many advantages in improving food quality and enhancing its shelf life. Recently, considerable efforts have been made to develop polysaccharide-based nanostructures for possible food applications. Therefore, it is of immense importance to explore literature on polysaccharide-based nanostructures delineating their food application potentialities. Herein, we reviewed the developments in polysaccharide-based bio-nanostructures and highlighted their potential applications in food preservation and bioactive "smart" food packaging. We categorized these bio-nanostructures into polysaccharide-based nanoparticles, nanocapsules, nanocomposites, dendrimeric nanostructures, and metallo-polysaccharide hybrids. This review demonstrates that the polysaccharides are emerging biopolymers, gaining much attention as robust biomaterials with excellent tuneable properties.
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Affiliation(s)
- Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China.
| | - Ijaz Gul
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Aneela Basharat
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
| | - Sarmad Ahmad Qamar
- Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 10608, Taiwan.
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36
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Mostakhdemin M, Nand A, Ramezani M. A novel assessment of microstructural and mechanical behaviour of bilayer silica-reinforced nanocomposite hydrogels as a candidate for artificial cartilage. J Mech Behav Biomed Mater 2021; 116:104333. [PMID: 33494020 DOI: 10.1016/j.jmbbm.2021.104333] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 12/23/2020] [Accepted: 01/12/2021] [Indexed: 12/20/2022]
Abstract
The complex structure of healthy articular cartilage facilitates the joint withstanding the imposed pressures and retaining interstitial fluid to lessen stresses on its soft tissue, while easing the locomotion and minimising friction between cartilage mates. Avascular nature of this tissue results in unrecoverable damaged lesions and severe pain over time. Polymeric hydrogels are promising candidate materials for the replacement of the damaged cartilage. Hence, a tough bilayer nanocomposite acrylamide-acrylic acid hydrogel reinforced with silica nanoparticles (SNPs) was designed and synthesised. The mechanical characterisations showed a significant increase in compressive strength up to 1.4 MPa and doubled elastic modulus (240 kPa) by utilising only 0.6 wt% SNPs compared to the non-reinforced hydrogel. The optimum amounts of monomers and SNPs resulted in the compression of samples up to 85% strain without failure. Viscoelastic responses improved as the stress relaxation lessened to half in all nanocomposite hydrogels. Diffusion rate theory was applied, and the results showed to what extent elastic modulus results in an improvement in stress relaxation. The proposed hydrogel formulation exhibited the poroelastic relaxation occurred before viscoelastic relaxation at the time elapses under stress relaxation tests. SEM images showed uniform funnel-like porosity with 570 μm thick lubricious layer, which is an important feature to retain interstitial fluid. Energy-dispersive X-ray spectroscopy was conducted to characterise the elemental composition within the polymeric macrostructure.
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Affiliation(s)
- Mohammad Mostakhdemin
- Department of Mechanical Engineering, Auckland University of Technology, Auckland, New Zealand.
| | - Ashveen Nand
- School of Environmental and Animal Sciences and School of Healthcare and Social Practice, Unitec Institute of Technology, Auckland, New Zealand
| | - Maziar Ramezani
- Department of Mechanical Engineering, Auckland University of Technology, Auckland, New Zealand.
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37
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Wang L, Lin L, Guo Y, Long J, Mu RJ, Pang J. Enhanced functional properties of nanocomposite film incorporated with EGCG-loaded dialdehyde glucomannan/gelatin matrix for food packaging. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105863] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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38
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Sun J, Yu J, Jiang Z, Zhao Z, Xia Y. Fluorescent Carbonized Polymer Dots Prepared from Sodium Alginate Based on the CEE Effect. ACS OMEGA 2020; 5:27514-27521. [PMID: 33134714 PMCID: PMC7594134 DOI: 10.1021/acsomega.0c03995] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 10/05/2020] [Indexed: 05/16/2023]
Abstract
In recent years, as a new type of carbon dots, carbonized polymer dots (CPDs) have attracted more and more attention in many fields. In this experiment, a new kind of CPDs was synthesized by the hydrothermal treatment of the chemically cross-linked sodium alginate (SA) via glutaraldehyde. The fluorescence of CPDs was greatly enhanced because of the cross-linking enhanced emission effect. The formation process of CPDs at different reaction temperatures was explored. In addition, it was found that CPDs have stable fluorescence properties in mild acidic/basic and metal-ion environments. The in vitro toxicity of CPDs was tested, and based on their nontoxic property, SA films with anti-ultraviolet aging properties were prepared by using CPDs as the additive.
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Affiliation(s)
- Jianxin Sun
- State Key Laboratory of Bio-Fibers
and Eco-Textiles, Shandong Collaborative Innovation Center of Marine
Biobased Fibers and Ecological Textiles, Institute of Marine Biobased
Materials, School of Material Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Junke Yu
- State Key Laboratory of Bio-Fibers
and Eco-Textiles, Shandong Collaborative Innovation Center of Marine
Biobased Fibers and Ecological Textiles, Institute of Marine Biobased
Materials, School of Material Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Zhenjie Jiang
- State Key Laboratory of Bio-Fibers
and Eco-Textiles, Shandong Collaborative Innovation Center of Marine
Biobased Fibers and Ecological Textiles, Institute of Marine Biobased
Materials, School of Material Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Zhihui Zhao
- State Key Laboratory of Bio-Fibers
and Eco-Textiles, Shandong Collaborative Innovation Center of Marine
Biobased Fibers and Ecological Textiles, Institute of Marine Biobased
Materials, School of Material Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Yanzhi Xia
- State Key Laboratory of Bio-Fibers
and Eco-Textiles, Shandong Collaborative Innovation Center of Marine
Biobased Fibers and Ecological Textiles, Institute of Marine Biobased
Materials, School of Material Science and Engineering, Qingdao University, Qingdao 266071, China
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Jahangir S, Eglin D, Pötter N, Khozaei Ravari M, Stoddart MJ, Samadikuchaksaraei A, Alini M, Baghaban Eslaminejad M, Safa M. Inhibition of hypertrophy and improving chondrocyte differentiation by MMP-13 inhibitor small molecule encapsulated in alginate-chondroitin sulfate-platelet lysate hydrogel. Stem Cell Res Ther 2020; 11:436. [PMID: 33036643 PMCID: PMC7545577 DOI: 10.1186/s13287-020-01930-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 09/08/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Mesenchymal stem cells are a promising cell source for chondrogenic differentiation and have been widely used in several preclinical and clinical studies. However, they are prone to an unwanted differentiation process towards hypertrophy that limits their therapeutic efficacy. Matrix metallopeptidase 13 (MMP-13) is a well-known factor regulated during this undesirable event. MMP-13 is a collagen degrading enzyme, which is also highly expressed in the hypertrophic zone of the growth plate and in OA cartilage. Accordingly, we investigated the effect of MMP-13 inhibition on MSC hypertrophy. METHODS In this study, 5-bromoindole-2-carboxylic acid (BICA) was used as an inhibitory agent for MMP-13 expression. After identifying its optimal concentration, BICA was mixed into a hydrogel and the release rate was studied. To prepare the ideal hydrogel, chondroitin sulfate (CS) and platelet lysate (PL) were mixed with sodium alginate (Alg) at concentrations selected based on synergistic mechanical and rheometric properties. Then, four hydrogels were prepared by combining alginate (1.5%w/v) and/or CS (1%w/v) and/or PL (20%v/v). The chondrogenic potential and progression to hypertrophy of human bone marrow-derived mesenchymal stem cell (hBM-MSC)-loaded hydrogels were investigated under free swelling and mechanical loading conditions, in the presence and absence of BICA. RESULTS Viability of hBM-MSCs seeded in the four hydrogels was similar. qRT-PCR revealed that BICA could successfully inhibit MMP-13 expression, which led to an inhibition of Coll X and induction of Coll-II, in both free swelling and loading conditions. The GAG deposition was higher in the group combining BICA and mechanical stimulation. CONCLUSIONS It is concluded that BICA inhibition of MMP-13 reduces MSC hypertrophy during chondrogenesis.
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Affiliation(s)
- Shahrbanoo Jahangir
- Department of Tissue engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
| | - Naomi Pötter
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
- Department of orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center Albert-Ludwigs University, Albert-Ludwigs University of Freiburg, Freiburg im Breisgau, Germany
| | - Mojtaba Khozaei Ravari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Martin J Stoddart
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
- Department of orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center Albert-Ludwigs University, Albert-Ludwigs University of Freiburg, Freiburg im Breisgau, Germany
| | - Ali Samadikuchaksaraei
- Department of Tissue engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
- Department of Medical Biotechnology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mauro Alini
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland.
| | - Mohammadreza Baghaban Eslaminejad
- Department of Stem Cells and Developmental Biology, Cell Science Research Center Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.
| | - Majid Safa
- Department of Tissue engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran.
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran.
- Department of Hematology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran.
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40
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Naidu DS, John MJ. Effect of Clay Nanofillers on the Mechanical and Water Vapor Permeability Properties of Xylan-Alginate Films. Polymers (Basel) 2020; 12:polym12102279. [PMID: 33020377 PMCID: PMC7601507 DOI: 10.3390/polym12102279] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 01/04/2023] Open
Abstract
In this study, xylan–alginate-based films were reinforced with nanoclays (bentonite or halloysite) by the solvent casting technique. The effect of the nanoclay loadings (1–5 wt %) on various properties—mechanical, optical, thermal, solubility, water sorption, and water vapor permeability (WVP)—of the xylan–alginate films were examined for their application as food packaging materials. A 5 wt % loading of either bentonite or halloysite resulted in a 49% decrease of the WVP due to the impermeable nature of the silicate layers that make up both bentonite and halloysite. Thermal stability and solubility of the nanocomposite films were not significantly influenced by the presence of the nanoclays, whereas the optical properties were significantly improved when compared to neat xylan–alginate blend. In general, films reinforced with bentonite exhibited superior mechanical and optical properties when compared to both halloysite-based nanocomposite and neat films.
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Affiliation(s)
- Darrel S. Naidu
- CSIR, Centre for Nanostructures and Advanced Materials, Pretoria 0184, South Africa;
- Department of Chemistry, Nelson Mandela University, Port Elizabeth 6031, South Africa
- Correspondence:
| | - Maya J. John
- CSIR, Centre for Nanostructures and Advanced Materials, Pretoria 0184, South Africa;
- Department of Chemistry, Nelson Mandela University, Port Elizabeth 6031, South Africa
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41
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Cai C, Ma R, Duan M, Deng Y, Liu T, Lu D. Effect of starch film containing thyme essential oil microcapsules on physicochemical activity of mango. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109700] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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42
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Design, optimization and characterization of novel topical formulations containing Triamcinolone Acetonide. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101594] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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43
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Significantly improve the water and chemicals resistance of alginate-based nanocomposite films by a simple in-situ surface coating approach. Int J Biol Macromol 2020; 156:1297-1307. [PMID: 31759999 DOI: 10.1016/j.ijbiomac.2019.11.168] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 11/13/2019] [Accepted: 11/19/2019] [Indexed: 11/24/2022]
Abstract
Biopolymers have shown great application prospects due to their advantages of being biodegradable, renewable, non-toxic, safe and inexpensive. However, the innate hydrophilicity of biopolymers means the materials prepared from them easily swell or disintegrate in aqueous media, limiting their applications. Herein, on the basis of improving the mechanical performance of a sodium alginate/poly(vinyl alcohol) (SA/PVA) film by introducing palygorskite (Pal) nanorods, the hydrophobicity of the obtained SA/PVA/Pal film was improved further by surface coating with methyltrichlorosilane (MTCS) through a vapor deposition-surface polycondensation reaction. MTCS nanofilaments, with a size of approximately 50 nm, were formed on the film surface by the silanization reaction between MTCS and hydroxyls, resulting in an improvement in surface hydrophobicity characterized by a contact angle (111.8°) higher than that of SA/PVA/Pal film (72.7°). Therefore, the obtained films maintained their original shape and strength after soaking for a long time in aqueous solutions containing acid, alkaline, and electrolyte, also in organics, while the uncoated film dissolved quickly and lost its original shape. Moreover, the surface coating also increased the film's tensile strength from 11.43 to 28.69 MPa. This demonstrates a simple, universal and effective way to improve the resistance of biopolymer-derived materials to water and various chemicals.
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44
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Development of thermal insulation packaging film based on poly(vinyl alcohol) incorporated with silica aerogel for food packaging application. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109568] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Goudar N, Vanjeri VN, Dixit S, Hiremani V, Sataraddi S, Gasti T, Vootla SK, Masti SP, Chougale RB. Evaluation of multifunctional properties of gallic acid crosslinked Poly (vinyl alcohol)/Tragacanth Gum blend films for food packaging applications. Int J Biol Macromol 2020; 158:139-149. [PMID: 32360200 DOI: 10.1016/j.ijbiomac.2020.04.223] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 12/14/2022]
Abstract
The natural polymer Tragacanth Gum is less explored as a supporting matrix, there are very less studies conducted using this polymer in literature. So the present study aims to explore the consequences of different weight percent (wt.%) of gallic acid (GA) on physicochemical properties of Poly (vinyl alcohol)/Tragacanth Gum blend films. The incorporation of GA resulted in more strengthened but less flexible films as confirmed by tensile tests. DSC studies confirmed the miscibility of composite films in the given composition range and TGA studies revealed increased thermal stability. The morphological studies revealed a homogeneous distribution of GA at lower wt.% in the blend system. X-Ray Diffraction study depicted; the added GA lost crystalline structure after incorporating it into the blend. The Water Vapor Transmission Rate (WVTR) was improved after the incorporation of GA into the blend system. Overall migration studies revealed the limited release of GA from the matrix into food simulants. Soil degradation rate increased as the wt.% of GA increased. The composite films presented strong antioxidant activity; therefore, prepared composite films could be used as an alternative to current packaging materials.
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Affiliation(s)
- Naganagouda Goudar
- P G Department of Studies in Chemistry, Karnatak University, Dharwad - 580 003, India
| | - Vinayak N Vanjeri
- P G Department of Studies in Chemistry, Karnatak University, Dharwad - 580 003, India
| | - Shruti Dixit
- Department of Biotechnology and Microbiology, Karnatak University, Dharwad - 580 003, India
| | - Vishram Hiremani
- P G Department of Studies in Chemistry, Karnatak University, Dharwad - 580 003, India
| | - Sarala Sataraddi
- P G Department of Studies in Chemistry, Karnatak University, Dharwad - 580 003, India
| | - Tilak Gasti
- P G Department of Studies in Chemistry, Karnatak University, Dharwad - 580 003, India
| | - Shyam Kumar Vootla
- Department of Biotechnology and Microbiology, Karnatak University, Dharwad - 580 003, India
| | - Saraswati P Masti
- Department of Chemistry, Karnatak Science College, Dharwad - 580 001, India
| | - Ravindra B Chougale
- P G Department of Studies in Chemistry, Karnatak University, Dharwad - 580 003, India.
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Afshar M, Dini G, Vaezifar S, Mehdikhani M, Movahedi B. Preparation and characterization of sodium alginate/polyvinyl alcohol hydrogel containing drug-loaded chitosan nanoparticles as a drug delivery system. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101530] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Yang M, Li L, Yu S, Liu J, Shi J. High performance of alginate/polyvinyl alcohol composite film based on natural original melanin nanoparticles used as food thermal insulating and UV-vis block. Carbohydr Polym 2020; 233:115884. [PMID: 32059915 DOI: 10.1016/j.carbpol.2020.115884] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/07/2020] [Accepted: 01/14/2020] [Indexed: 01/11/2023]
Abstract
Light is a major factor in promoting food aging and deterioration, especially for ultraviolet (UV) light. Herein, bioinspired dopamine-melanin solid nanoparticles with strong absorption at a wide range of 200-2500 nm were first incorporated into alginate/polyvinyl alcohol to fabricate film materials in this work for UV-vis block, and this also brings excellent thermal insulating properties to the materials. In addition, in order to obtain a material with excellent performance, particles of uniform size of about 100 nm are obtained by fractional centrifugation. It was found the mechanical, UV-vis block and thermal insulating properties were improved significantly compared with the control samples. This study provides a strategy to design a non-polluting, biodegradable, biocompatible film with excellent mechanical properties that can be used in UV-vis barriers and has potential applications in thermal insulating materials for food preservation.
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Affiliation(s)
- Manli Yang
- College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao, 266109, PR China; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao, 266071, PR China
| | - Lin Li
- College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao, 266109, PR China
| | - Shuguang Yu
- College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao, 266109, PR China
| | - Jiawei Liu
- College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao, 266109, PR China
| | - Jinsheng Shi
- College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao, 266109, PR China.
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Zhu G, Gu Y, Wang Y, Liu G, Battaglia VS, Qu Q, Zheng H. Suppressing the dry bed-lake fracture of silicon anode via dispersant modification in electrode processing. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.07.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Zhang R, Cheng M, Wang X, Wang J. Bioactive mesoporous nano-silica/potato starch films against molds commonly found in post-harvest white mushrooms. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2019.04.060] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Sodium Alginate-Based Green Packaging Films Functionalized by Guava Leaf Extracts and Their Bioactivities. MATERIALS 2019; 12:ma12182923. [PMID: 31510022 PMCID: PMC6766187 DOI: 10.3390/ma12182923] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 08/28/2019] [Accepted: 09/09/2019] [Indexed: 11/16/2022]
Abstract
The aim of this work was to develop green and bioactive films with sodium alginate incorporating guava leaf extracts. Seven formulations were performed with a different sodium alginate: Guava leaf water extract (WE)/ethanolic extract (EE) proportions (100:0, 90:10, 85:15, 80:20), and glycerol were used as a plasticizer. The HPLC-PDA analysis showed the main phenolic compounds in WE were gallic acid, ellagic acid, quercetin-3-O-β-D-xylopyranoside, avicularin and quercetin. The main polyphenols in EE were rutin, isoquercitrin, quercetin-3-O-β-D-xylopyranoside, avicularin, quercitrin, quercetin and kaempferol. Guava leaf extracts could greatly enhance the antioxidant activity, antibacterial activity, tensile strength and water solubility of the sodium alginate film as well as the water barrier property, while inducing a decrease in the moisture content and elongation at the break. The FTIR and SEM analyses indicated that intermolecular hydrogen bonding between the guava leaf extract and sodium alginate resulted in a more compact structure in the composite films. These results indicated that sodium alginate-guava leaf extract films might be developed into antiradical and antimicrobial food packaging materials.
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