1
|
Xiao H, Wang L, Bu N, Duan J, Pang J. Electrospun Photodynamic Antibacterial Konjac Glucomannan/Polyvinylpyrrolidone Nanofibers Incorporated with Lignin-Zinc Oxide Nanoparticles and Curcumin for Food Packaging. Foods 2024; 13:2007. [PMID: 38998513 PMCID: PMC11240967 DOI: 10.3390/foods13132007] [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: 05/24/2024] [Revised: 06/21/2024] [Accepted: 06/22/2024] [Indexed: 07/14/2024] Open
Abstract
Due to the growing concerns surrounding microbial contamination and food safety, there has been a surge of interest in fabricating novel food packaging with highly efficient antibacterial activity. Herein, we describe novel photodynamic antibacterial konjac glucomannan (KGM)/polyvinylpyrrolidone (PVP) nanofibers incorporated with lignin-zinc oxide composite nanoparticles (L-ZnONPs) and curcumin (Cur) via electrospinning technology. The resulting KGM/PVP/Cur/L-ZnONPs nanofibers exhibited favorable hydrophobic properties (water contact angle: 118.1°), thermal stability, and flexibility (elongation at break: 241.9%). Notably, the inclusion of L-ZnONPs and Cur endowed the nanofibers with remarkable antioxidant (ABTS radical scavenging activity: 98.1%) and photodynamic antimicrobial properties, demonstrating enhanced inhibitory effect against both Staphylococcus aureus (inhibition: 12.4 mm) and Escherichia coli (12.1 mm). As a proof-of-concept study, we evaluated the feasibility of applying nanofibers to fresh strawberries, and the findings demonstrated that our nanofibers could delay strawberry spoilage and inhibit microbial growth. This photodynamic antimicrobial approach holds promise for design of highly efficient antibacterial food packaging, thereby contributing to enhanced food safety and quality assurance.
Collapse
Affiliation(s)
- Huimin Xiao
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Lin Wang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China
| | - Nitong Bu
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jie Duan
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jie Pang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| |
Collapse
|
2
|
Hamdy E, Al-Askar AA, El-Gendi H, Khamis WM, Behiry SI, Valentini F, Abd-Elsalam KA, Abdelkhalek A. Zinc Oxide Nanoparticles Biosynthesized by Eriobotrya japonica Leaf Extract: Characterization, Insecticidal and Antibacterial Properties. PLANTS (BASEL, SWITZERLAND) 2023; 12:2826. [PMID: 37570980 PMCID: PMC10421472 DOI: 10.3390/plants12152826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/15/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023]
Abstract
Zinc oxide nanoparticles (ZnO-NPs) have gained significant attention in nanotechnology due to their unique properties and potential applications in various fields, including insecticidal and antibacterial activities. The ZnO-NPs were biosynthesized by Eriobotrya japonica leaf extract and characterized by various techniques such as UV-visible (UV-vis) spectrophotometer, X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and zeta potential analysis. The results of SEM revealed that NPs were irregular and spherical-shaped, with a diameter between 5 and 27 nm. Meanwhile, DLS supported that the measured size distributions were 202.8 and 94.7 nm at 11.1° and 90.0°, respectively, which supported the polydisperse nature of NPs, and the corresponding zeta potential was -20.4 mV. The insecticidal activity of the produced ZnO-NPs was determined against the adult stage of coleopteran pests, Sitophilus oryzae (Linnaeus) (Curculionidae) and Tribolium castaneum (Herbst) (Tenebrionidae). The LC50 values of ZnO-NPs against adults of S. oryzae and T. castaneum at 24 h of exposure were 7125.35 and 5642.65 μg/mL, respectively, whereas the LC90 values were 121,824.56 and 66,825.76 μg/mL, respectively. Moreover, the biosynthesized nanoparticles exhibited antibacterial activity against three potato bacterial pathogens, and the size of the inhibition zone was concentration-dependent. The data showed that the inhibition zone size increased with an increase in the concentration of nanoparticles for all bacterial isolates tested. The highest inhibition zone was observed for Ralstonia solanacearum at a concentration of 5 µg/mL, followed by Pectobacterium atrosepticum and P. carotovorum. Eventually, ZnO-NPs could be successfully used as an influential agent in pest management programs against stored-product pests and potato bacterial diseases.
Collapse
Affiliation(s)
- Esraa Hamdy
- Plant Protection and Biomolecular Diagnosis Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, Alexandria 21934, Egypt;
| | - Abdulaziz A. Al-Askar
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Hamada El-Gendi
- Bioprocess Development Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications, New Borg El-Arab City 21934, Egypt;
| | - Wael M. Khamis
- Plant Protection Research Institute, Agriculture Research Center, Al-Sabhia, Alexandria 21616, Egypt;
| | - Said I. Behiry
- Agricultural Botany Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria 21531, Egypt;
| | - Franco Valentini
- Istituto Agronomico Mediterraneo di Bari, Via Ceglie 9, Valenzano, 70010 Bari, Italy;
| | - Kamel A. Abd-Elsalam
- Plant Pathology Research Institute, Agricultural Research Centre, Giza 12619, Egypt
| | - Ahmed Abdelkhalek
- Plant Protection and Biomolecular Diagnosis Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, Alexandria 21934, Egypt;
| |
Collapse
|
3
|
Chen M, Li Y, Liu H, Zhang D, Shi QS, Zhong XQ, Guo Y, Xie XB. High value valorization of lignin as environmental benign antimicrobial. Mater Today Bio 2023; 18:100520. [PMID: 36590981 PMCID: PMC9800644 DOI: 10.1016/j.mtbio.2022.100520] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/08/2022] [Accepted: 12/10/2022] [Indexed: 12/23/2022] Open
Abstract
Lignin is a natural aromatic polymer of p-hydroxyphenylpropanoids with various biological activities. Noticeably, plants have made use of lignin as biocides to defend themselves from pathogen microbial invasions. Thus, the use of isolated lignin as environmentally benign antimicrobial is believed to be a promising high value approach for lignin valorization. On the other hand, as green and sustainable product of plant photosynthesis, lignin should be beneficial to reduce the carbon footprint of antimicrobial industry. There have been many reports that make use of lignin to prepare antimicrobials for different applications. However, lignin is highly heterogeneous polymers different in their monomers, linkages, molecular weight, and functional groups. The structure and property relationship, and the mechanism of action of lignin as antimicrobial remains ambiguous. To show light on these issues, we reviewed the publications on lignin chemistry, antimicrobial activity of lignin models and isolated lignin and associated mechanism of actions, approaches in synthesis of lignin with improved antimicrobial activity, and the applications of lignin as antimicrobial in different fields. Hopefully, this review will help and inspire researchers in the preparation of lignin antimicrobial for their applications.
Collapse
Affiliation(s)
- Mingjie Chen
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Yan Li
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Huiming Liu
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Dandan Zhang
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Qing-Shan Shi
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Xin-Qi Zhong
- Department of Neonatology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Yanzhu Guo
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Xiao-Bao Xie
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| |
Collapse
|
4
|
Lignin Derived from Forestry Biomass as Capping Reagent in the Biosynthesis and Characterization of Zinc Oxide Nanoparticles and Their In Vitro Efficacy as a Strong Antifungal Biocontrolling Agent for Commercial Crops. BIONANOSCIENCE 2022. [DOI: 10.1007/s12668-022-01052-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
5
|
Haque S, Faidah H, Ashgar SS, Abujamel TS, Mokhtar JA, Almuhayawi MS, Harakeh S, Singh R, Srivastava N, Gupta VK. Green Synthesis of Zn(OH) 2/ZnO-Based Bionanocomposite using Pomegranate Peels and Its Application in the Degradation of Bacterial Biofilm. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3458. [PMID: 36234586 PMCID: PMC9565895 DOI: 10.3390/nano12193458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/11/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
The ability and potency of bacterial species to form biofilms, which show antibiotic resistance thereby avoiding antibiotic surfaces, is a major cause of prolonged infections. Various advanced approaches have been employed to prevent or damage bacterial biofilms, formed by a variety of bacterial strains, to help prevent the associated infectious disease. In this context, zinc-based nanostructures have been recognized as a potential antibiotic agent against a broad spectrum of bacterial communities. As a result, a sustainable and green synthesis method was adapted in the present study to synthesize a Zn(OH)2/ZnO-based bionanocomposite, in which aqueous extracts of waste pomegranate peels (Punica granatum) were employed as a natural bioreducing agent to prepare the bionanocomposite at room temperature. Furthermore, FT-IR, XRD, DLS, UV-Visible, PL spectroscopy, FE-SEM, and TEM were used to characterize the green route synthesized a Zn(OH)2/ZnO bionanocomposite. The average crystallite size was determined using the Scherrer relation to be 38 nm, and the DLS results indicated that the Zn(OH)2/ZnO bionanocomposite had a hydrodynamic size of 170 nm. On the other hand, optical properties investigated through UV-Vis and PL spectroscopy explored the energy bandgap between 2.80 and 4.46 eV, corresponding to the three absorption edges, and it covered the blue spectrum when the sample was excited at 370 nm. Furthermore, the impact of this green route synthesized a Zn(OH)2/ZnO bionanocomposite on the biofilm degradation efficiency of the pathogenic bacterial strain Bacillus subtilis PF_1 using the Congored method was investigated. The Congored assay clearly explored the biofilm degradation efficiency in the presence of a 50 mg/mL and 75 mg/mL concentration of the Zn(OH)2/ZnO bionanocomposite against the bacterial strain Bacillus subtilis PF_1 grown for 24 h. This study can be further applied to the preparation of bionanocomposites following a low-cost green synthesis approach, and thus prepared nanostructures can be exploited as advanced antimicrobial agents, which could be of great interest to prevent various infectious diseases.
Collapse
Affiliation(s)
- Shafiul Haque
- Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan 45142, Saudi Arabia
| | - Hani Faidah
- Department of Microbiology, Faculty of Medicine, Umm Al-Qura University, Makkah 24382, Saudi Arabia
| | - Sami S. Ashgar
- Department of Microbiology, Faculty of Medicine, Umm Al-Qura University, Makkah 24382, Saudi Arabia
| | - Turki S. Abujamel
- Vaccines and Immunotherapy Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Jawahir A. Mokhtar
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, King Abdulaziz University Hospital, Jeddah 21589, Saudi Arabia
- Vaccines and Immunotherapy Unit, King Fahad Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mohammed Saad Almuhayawi
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Steve Harakeh
- King Fahd Medical Research Center, Yousef Abdullatif Jameel Chair of Prophetic Medicine Application, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Rajeev Singh
- Department of Environmental Studies, Satyawati College, University of Delhi, Delhi 110052, India
| | - Neha Srivastava
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221005, India
| | - Vijai Kumar Gupta
- Biorefining and Advanced Materials Research Center, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK
- Center for Safe and Improved Food, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK
| |
Collapse
|
6
|
Bilal B, Niazi R, Nadeem S, Farid MA, Nazir MS, Akhter T, Javed M, Mohyuddin A, Rauf A, Ali Z, Naqvi SAR, Muhammad N, Elkaeed EB, Ibrahium HA, Awwad NS, Hassan SU. Fabrication of Guided Tissue Regeneration Membrane Using Lignin-Mediated ZnO Nanoparticles in Biopolymer Matrix for Antimicrobial Activity. Front Chem 2022; 10:837858. [PMID: 35518713 PMCID: PMC9063929 DOI: 10.3389/fchem.2022.837858] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 03/21/2022] [Indexed: 11/25/2022] Open
Abstract
Periodontal disease is a common complication, and conventional periodontal surgery can lead to severe bleeding. Different membranes have been used for periodontal treatment with limitations, such as improper biodegradation, poor mechanical property, and no effective hemostatic property. Guided tissue regeneration (GTR) membranes favoring periodontal regeneration were prepared to overcome these shortcomings. The mucilage of the chia seed was extracted and utilized to prepare the guided tissue regeneration (GTR) membrane. Lignin having antibacterial properties was used to synthesize lignin-mediated ZnO nanoparticles (∼Lignin@ZnO) followed by characterization with analytical techniques like Fourier-transform infrared spectroscopy (FTIR), UV–visible spectroscopy, and scanning electron microscope (SEM). To fabricate the GTR membrane, extracted mucilage, Lignin@ZnO, and polyvinyl alcohol (PVA) were mixed in different ratios to obtain a thin film. The fabricated GTR membrane was evaluated using a dynamic fatigue analyzer for mechanical properties. Appropriate degradation rates were approved by degradability analysis in water for different intervals of time. The fabricated GTR membrane showed excellent antibacterial properties against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) bacterial species.
Collapse
Affiliation(s)
- Bushra Bilal
- Department of Chemistry, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Rimsha Niazi
- Department of Chemistry, School of Sciences, University of Management and Technology, Lahore Campus, Lahore, Pakistan
| | - Sohail Nadeem
- Department of Chemistry, School of Sciences, University of Management and Technology, Lahore Campus, Lahore, Pakistan
| | - Muhammad Asim Farid
- Department of Chemistry, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Muhammad Shahid Nazir
- Department of Chemistry, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Toheed Akhter
- Department of Chemistry, School of Sciences, University of Management and Technology, Lahore Campus, Lahore, Pakistan
| | - Mohsin Javed
- Department of Chemistry, School of Sciences, University of Management and Technology, Lahore Campus, Lahore, Pakistan
| | - Ayesha Mohyuddin
- Department of Chemistry, School of Sciences, University of Management and Technology, Lahore Campus, Lahore, Pakistan
| | - Abdul Rauf
- Department of Chemistry, School of Sciences, University of Management and Technology, Lahore Campus, Lahore, Pakistan
| | - Zulfiqar Ali
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore, , Pakistan
| | - Syed Ali Raza Naqvi
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Nawshad Muhammad
- Department of Dental Materials, Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan
| | - Eslam B Elkaeed
- Department of Pharmaceutical Sciences, College of Pharmacy, Almaarefa University, Riyadh, Saudi Arabia
| | - Hala A Ibrahium
- Biology Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia.,Department of Semi Pilot Plant, Nuclear Materials Authority, Cairo, Egypt
| | - Nasser S Awwad
- Chemistry Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Sadaf Ul Hassan
- Department of Chemistry, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan.,Department of Chemistry, School of Sciences, University of Management and Technology, Lahore Campus, Lahore, Pakistan
| |
Collapse
|
7
|
Synthesis of a Lignin/Zinc Oxide Hybrid Nanoparticles System and Its Application by Nano-Priming in Maize. NANOMATERIALS 2022; 12:nano12030568. [PMID: 35159913 PMCID: PMC8839687 DOI: 10.3390/nano12030568] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/25/2022] [Accepted: 02/04/2022] [Indexed: 02/05/2023]
Abstract
Nanotechnologies are attracting attention in various scientific fields for their technological and application potential, including their use as bio-activators and nanocarriers in agriculture. This work aimed to synthesize a hybrid material (ZnO@LNP) consisting of lignin nanoparticles containing zinc oxide (4 wt %). The synthesized ZnO hybrid material showed catalytic effect toward thermal degradation, as evidenced by the TGA investigation, while both spectroscopic and contact angle measurements confirmed a modification of surface hydrophilicity for the lignin nanoparticles due to the presence of hydrophobic zinc oxide. In addition, the antioxidant activity of the ZnO@LNP and the zinc release of this material were evaluated. At the application level, this study proposes for the first time the use of such a hybrid system to prime maize seeds by exploiting the release characteristics of this material. Concerning the dosage applied, ZnO@LNP promoted inductive effects on the early stages of seed development and plant growth and biomass development of young seedlings. In particular, the ZnO@LNP stimulated, in the primed seeds, a higher content of chlorophyll, carotenoids, anthocyanins, total phenols, and a better antioxidant activity, as supported by the lower levels of lipid peroxidation found when compared to the control samples.
Collapse
|
8
|
Joshi KM, Shelar A, Kasabe U, Nikam LK, Pawar RA, Sangshetti J, Kale BB, Singh AV, Patil R, Chaskar MG. Biofilm inhibition in Candida albicans with biogenic hierarchical zinc-oxide nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 134:112592. [DOI: 10.1016/j.msec.2021.112592] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 11/14/2021] [Accepted: 11/30/2021] [Indexed: 12/28/2022]
|
9
|
Development of photoresponsive zinc oxide nanoparticle - encapsulated lignin functionalized with 2-[(E)-(2-hydroxy naphthalen-1-yl) diazenyl] benzoic acid: A promising photoactive agent for antimicrobial photodynamic therapy. Photodiagnosis Photodyn Ther 2021; 36:102479. [PMID: 34375774 DOI: 10.1016/j.pdpdt.2021.102479] [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: 06/02/2021] [Revised: 07/29/2021] [Accepted: 08/05/2021] [Indexed: 12/29/2022]
Abstract
BACKGROUND By coalescing nanotechnology with photochemistry and microbiology, a new type of photoactive antimicrobial agent based on zinc oxide nanoparticles incorporated into biomacromolecular lignin was formulated, which possesses a wide-spectrum antimicrobial activity, providing effects in the field of antimicrobial photodynamic therapy. METHODS The biomacromolecule lignin was functionally modified with 2-[(E)-(2-hydroxy naphthalen-1-yl) diazenyl] benzoic acid by Steglich esterification, and loaded with zinc oxide nanoparticles. The products were characterized by UV-Visible, FTIR, and NMR spectroscopic techniques, and by SEM, TEM, and X-ray diffraction analysis (XRD). The photoresponsive behavior of the dye, functionally modified lignin-dye ester and its nanoparticle dispersed product was investigated. The photoinduced antibacterial and antifungal effects of zinc oxide nanoparticle encapsulated functionally modified lignin were explicated in detail. RESULTS The photostabilization property of the chromophoric system was found to be enhanced when attached to lignin, and was further improved by the encapsulation of photoactive zinc oxide nanoparticles. The detailed studies on the photoinduced antibacterial and antifungal property revealed that upon light irradiation the antibacterial and antifungal efficacies of the test system got magnified. CONCLUSIONS Incorporation of photoactive zinc oxide nanoparticles into the functionalized macromolecular system could make important changes in their photoresponsive abilities such as enhanced light absorption behavior and photostabilization properties enriched with photoinduced antimicrobial efficacy, which rendered the functionally modified system a potential photoinduced antimicrobial agent. They may find use in various biomedical applications especially in antimicrobial photodynamic therapy.
Collapse
|