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Amino‐terminated hyperbranched polymer functionalized graphene oxide with in situ trapped silver nanoparticles for high‐performance antibacterial nonwoven fabric. J Appl Polym Sci 2022. [DOI: 10.1002/app.53466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hazarika D, Kalita NK, Kumar A, Katiyar V. Functionalized poly(lactic acid) based nano-fabric for anti-viral applications. RSC Adv 2021; 11:32884-32897. [PMID: 35493591 PMCID: PMC9042262 DOI: 10.1039/d1ra05352c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 08/23/2021] [Indexed: 12/11/2022] Open
Abstract
This study endeavoured to explore and fabricate antiviral and antibacterial facemasks using zinc (oligo-lactate) (ZL), developed through a microwave synthesis technique. The prepared nano-fabric layer has excellent antiviral and antibacterial properties against Newcastle Disease Virus (NDV) and E. coli and S. aureus, respectively. Thermogravimetric analysis (TGA) of ZL shows a two-step thermal degradation, which confirms the formation of low molecular weight end group lactyl units with zinc ions. Another investigation using varying ZL concentration and silk nanocrystal (SNC) with poly(lactic acid) (PLA) and electrospinning them into nanofibres led to the fabrication of a facile and sustainable nanofabric that can be utilized as a protective layer for facemasks. Morphological analysis revealed the successful preparation of the nanofabric with proper distribution and uniformity in fibre diameter. Hydrophobicity of the prepared nanofabric confirmed excellent protection from water droplets that may transpire during coughing or sneezing by an infected individual. Breathability and reusability tests confirmed that the prepared facemask could be reused by ethanol washing without compromising its surface properties till 4 cycles. The PLA/ZL nanofabric layer demonstrated 97% antiviral efficacy against NDV in 10 minutes. In conclusion, the electrospun nanofabric layer can be used as a facemask having high hydrophobicity, good breathability, antibacterial, and antiviral properties to control the spread of contagious diseases.
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Affiliation(s)
- Doli Hazarika
- Chemical Engineering Department, Indian Institute of Technology Guwahati Assam-781039 India
| | - Naba Kumar Kalita
- Chemical Engineering Department, Indian Institute of Technology Guwahati Assam-781039 India
| | - Amit Kumar
- Chemical Engineering Department, Indian Institute of Technology Guwahati Assam-781039 India
| | - Vimal Katiyar
- Chemical Engineering Department, Indian Institute of Technology Guwahati Assam-781039 India
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Wang F, Yan B, Li Z, Wang P, Zhou M, Yu Y, Yuan J, Cui L, Wang Q. Rapid Antibacterial Effects of Silk Fabric Constructed through Enzymatic Grafting of Modified PEI and AgNP Deposition. ACS APPLIED MATERIALS & INTERFACES 2021; 13:33505-33515. [PMID: 34251171 DOI: 10.1021/acsami.1c08119] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Enzymatic antibacterial finishing is an eco-friendly alternative to develop functional silk-based materials. However, the low accessibility of tyrosine residues distributed in fibroin chains restricts the laccase-mediated functionalization of silk fibers (SF). To address this issue, a highly reactive p-hydroxyphenylacetic acid-modified polyethyleneimine (mPEI) was enzymatically grafted onto fibroin using laccase, aiming at constructing an antibacterial matrix of mPEI on the fiber surface. Subsequently, in situ deposition of silver nanoparticles (i.e., AgNPs) into the newly built mPEI network was performed to form a rapid antibacterial layer. The results indicated that laccase efficiently catalyzes the mPEI coupling, the zeta potential of SF-g-mPEI increases from -32 to 21.70 mV, and the silver content reaches 1.81% after AgNP embedment. Based on the combined two-step treatments, the obtained silk fabric exhibited excellent antibacterial abilities against two bacteria, including Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). The antibacterial rates of both bacteria reached 99.9% within 30 min of contact, remaining over 99.9% within 18 h of contact even after washing 10 times. The present work provides an enzyme-mediated method for construction of silk fabric with durable and rapid antibacterial activity.
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Affiliation(s)
- Feiyu Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Biaobiao Yan
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Zirong Li
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Ping Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Man Zhou
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Yuanyuan Yu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Jiugang Yuan
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Li Cui
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Qiang Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
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Dental Applications of Systems Based on Hydroxyapatite Nanoparticles—An Evidence-Based Update. CRYSTALS 2021. [DOI: 10.3390/cryst11060674] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hydroxyapatite is one of the most studied biomaterials in the medical and dental field, because of its biocompatibility; it is the main constituent of the mineral part of teeth and bones. In dental science, hydroxyapatite nanoparticles (HAnps) or nano-hydroxyapatite (nano-HA) have been studied, over the last decade, in terms of oral implantology and bone reconstruction, as well in restorative and preventive dentistry. Hydroxyapatite nanoparticles have significant remineralizing effects on initial enamel lesions, and they have also been used as an additive material in order to improve existing and widely used dental materials, mainly in preventive fields, but also in restorative and regenerative fields. This paper investigates the role of HAnps in dentistry, including recent advances in the field of its use, as well as their advantages of using it as a component in other dental materials, whether experimental or commercially available. Based on the literature, HAnps have outstanding physical, chemical, mechanical and biological properties that make them suitable for multiple interventions, in different domains of dental science. Further well-designed randomized controlled trials should be conducted in order to confirm all the achievements revealed by the in vitro or in vivo studies published until now.
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Shi C, Xing Y, Patil A, Meng Z, Yu R, Lin N, Qiu W, Hu F, Liu XY. Primary and Secondary Mesoscopic Hybrid Materials of Au Nanoparticles@Silk Fibroin and Applications. ACS APPLIED MATERIALS & INTERFACES 2019; 11:30125-30136. [PMID: 31368691 DOI: 10.1021/acsami.9b07846] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, we demonstrate the principle of mesoscopic construction of silk fibroin (SF) hybrid materials, which endows the materials with new performance. In implementing this strategy, mediating molecules, wool keratin (WK) molecules, were adopted to in-line synthesize Au nanoparticles (WK@AuNPs), which further create the stable linkage of AuNPs with SF nanofibril networks via templated β-crystallization. Fourier transform infrared spectroscopy, X-ray diffraction, and atomic force microscopy demonstrate that the mesoscopic hybrid network structure of the hybrid materials is different from neat SF materials, which gives rise to various new performances, that is, long-stable fluorescence emission. As the fluorescence emission can be characteristically annealed by Cu ions, therefore be adopted as the highly selective ion probes. Moreover, as WK@AuNPs are homogeneously connected to SF nanofibril networks, the carbonization of the materials leads to secondary hybrid materials of carbon-Au, where nano-sized Au particles are well distributed in carbonized mesoscopic conductive carbon networks. Such hybrid materials of carbon-Au can be further fabricated into electrochemical (i.e., dopamine) sensors, which are demonstrated to have excellent sensing performance.
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Affiliation(s)
| | | | | | | | | | | | | | - Fan Hu
- Advanced Soft Matter Group, Department of Chemical Engineering , Delft University of Technology , Vander Maasweg 9 , Delft 2629 HZ , The Netherlands
| | - Xiang Yang Liu
- Department of Physics , National University of Singapore , 2 Science Drive 3 , 117542 , Singapore
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One-Step Synthesis of Ag@TiO₂ Nanoparticles for Enhanced Photocatalytic Performance. NANOMATERIALS 2018; 8:nano8121032. [PMID: 30545034 PMCID: PMC6316728 DOI: 10.3390/nano8121032] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/03/2018] [Accepted: 12/10/2018] [Indexed: 01/02/2023]
Abstract
Polyamide network polymers (PNP) modified TiO2 nanoparticles (NPs) were decorated with Ag NPs in hydrothermal gel method, forming one-step synthesized photocatalysts, Ag@TiO2 NPs. The effect of PNP and the amount of Ag NPs added were investigated in this work. PNP acted as a nanocage to prevent TiO2 aggregation and capture Ag accurately, which could effectively control product sizes and improve dispersibility in solvents. Simultaneously, TiO2 NPs modified with Ag NPs exhibited remarkable photocatalytic effects. One-step synthesis simplified the experimental process and avoided the agglomeration of silver ions during the secondary reaction, achieving the purpose of uniform distribution at a specific location of TiO2 NPs. The prepared Ag@TiO2 NPs-0.5 could remove 79.49% of Methyl Orange (MO) after 3 h of ultraviolet light irradiation, which was 2.7 times higher than the reaction rate of pure TiO2 NPs. It also exhibited good photoactivity under Visible light conditions. Moreover, the mineralization rate of MO over the Ag@TiO2 NPs-0.5 could be up to 72.32% under UV light and 47.08% under Visible light irradiation, which revealed that the prepared catalysts could effectively degrade most of the MO to CO2 and H2O. The samples also demonstrated the excellent stability and easy recyclability with over 90% of the original catalytic level for MO degradation. The photocatalysts studied also exerted broad application prospects such as photovoltaic hydrogen production, electronic sensors and biomedicine.
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Synthesis of TiO 2NWS@Au NPS Composite Catalyst for Methylene Blue Removal. MATERIALS 2018; 11:ma11061022. [PMID: 29914079 PMCID: PMC6025176 DOI: 10.3390/ma11061022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/11/2018] [Accepted: 06/11/2018] [Indexed: 11/17/2022]
Abstract
In this article, HBP-NH2-modified titania nanowire (TiO2NWS)-decorated Au nanoparticles (TiO2NWS@AuNPS) were synthesized by one-step method. The role of HBP-NH2 concentration in the formation of TiO2NWS was investigated. The fineness and uniformity of pure TiO2NWS were enhanced by absorbed amino groups from amino-terminated hyperbranched polymer (HBP-NH2). The morphology and crystal structure of TiO2NWS and TiO2NWS@AuNPS were examined by transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fournier transform infrared (FTIR) spectroscopy. The chemical states of gold, titanium and oxygen were analyzed by X-ray photoelectron spectroscopy (XPS). The results showed that at the concentration of HBP-NH2 100 g/L, the mean diameter of TiO2NWS was nearly 72 nm and Au nanoparticles were uniformly distributed on the surface of TiO2NWS. The presence of AuNPS improved the photocatalytic properties of TiO2NWS under UV light irradiation. The Au load was believed to improve the utilization rate of the photoelectron and activated the adsorbed oxygen. The obtained TiO2NWS@AuNPS decomposed 99.6% methylene blue (MB) after 300 min when subjected to UV light irradiation. After five cycles of the catalyzing process, the TiO2NWS@AuNPS still retained over 90% of its catalytic ability for MB. The Au deposition was found responsible for the high catalytic activity of TiO2NWS@AuNPS.
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Biodegradable and Biocompatible Systems Based on Hydroxyapatite Nanoparticles. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7010060] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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9
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Liu Y, Chi W, Zhao D, Liu H, Deng Y. Molecular-Cage Method: An Improvement of the Precipitation Method in Synthesizing Nanoparticles. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b01714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yu Liu
- Key Laboratory of Carbon Fiber and Functional
Polymers, National Carbon Fiber Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, China
| | - Weidong Chi
- Key Laboratory of Carbon Fiber and Functional
Polymers, National Carbon Fiber Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, China
| | - Donglin Zhao
- Key Laboratory of Carbon Fiber and Functional
Polymers, National Carbon Fiber Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, China
| | - Hui Liu
- Key Laboratory of Carbon Fiber and Functional
Polymers, National Carbon Fiber Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yu Deng
- Key Laboratory of Carbon Fiber and Functional
Polymers, National Carbon Fiber Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, China
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Liu M, Zhang B, Wang H, Zhao F, Chen Y, Sun Q. Facile crosslinking synthesis of hyperbranch-substrate nanonetwork magnetite nanocomposite for the fast and highly efficient removal of lead ions and anionic dyes from aqueous solutions. RSC Adv 2016. [DOI: 10.1039/c6ra11037a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The aim of the present work was to investigate the effect of surface functional group density on the adsorption behaviors of functionalized mesoporous Fe3O4.
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Affiliation(s)
- Mingqiang Liu
- School of Environmental and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
- State Key Laboratory of Separation Membranes and Membrane Processes
| | - Baochang Zhang
- School of Environmental and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
| | - Huicai Wang
- School of Environmental and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
- State Key Laboratory of Separation Membranes and Membrane Processes
| | - Fei Zhao
- School of Environmental and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
| | - Yuan Chen
- School of Environmental and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
- State Key Laboratory of Separation Membranes and Membrane Processes
| | - Qiang Sun
- School of Environmental and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
- State Key Laboratory of Separation Membranes and Membrane Processes
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Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles. THEOR EXP CHEM+ 2015. [DOI: 10.1007/s11237-015-9401-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Biswas A, Banerjee A. Sunlight induced unique morphological transformation in graphene based nanohybrids: appearance of a new tetra-nanohybrid and tuning of functional property of these nanohybrids. SOFT MATTER 2015; 11:4226-4234. [PMID: 25892272 DOI: 10.1039/c5sm00359h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, sunlight was used for in situ preparation of gel-based various nanohybrid systems. A naturally occurring amino acid, l-phenylalanine derivative formed a hydrogel with graphene oxide (GO)/reduced graphene oxide (rGO) at physiological pH. This hydrogel was then used in the presence of silver ions and diffuse sunlight to form initially a tri-nanohybrid system consisting of six atom silver nanoclusters, nanosheets, and nanofibers. Interestingly, a time-dependent morphological transformation occurs in this nanohybrid system to form one tri-nanohybrid to another tri-nanohybrid with the appearance of a novel, nanoscopic intermediate tetra-nanohybrid system consisting of four distinctly different nanomaterials (nanofibers, nanosheets, nanospheres, and nanoparticles). UV-Vis and fluorescence spectroscopic analyses, transmission electron microscopic, X-ray photo electron spectroscopic and MALDI-TOF mass spectral analyses with time were applied to characterise these morphological transformations in gel based nanohybrids. Time-dependent X-ray photo electron spectroscopic (XPS) analysis was used to uncover the mechanism for the transformation of silver nanoclusters to silver nanoparticles in the hydrogel matrix. Sunlight was used to trigger time-dependent structural transformation in the nanohybrid systems. Interestingly, one of these tri-nanohybrid systems (silver nanoparticles containing rGO based hydrogel) shows a catalytic property of reducing nitroarenes to aminoarenes and the catalytic efficiency can be modulated by changing the size of the silver nanoparticles with time in diffuse sunlight. The mechanism for different catalytic activities for different hybrids with varying size of silver nanoparticles has also been deciphered.
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Affiliation(s)
- Abhijit Biswas
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
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Huang G, Tong G, Liu J, Zhang W, Chen L, Quan C, Jiang Q, Sun H, Zhang C. Construction of Silver Nanoparticle-Loaded MicellesViaCoordinate Interaction and Their Antibacterial Activity. INT J POLYM MATER PO 2015. [DOI: 10.1080/00914037.2015.1030655] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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