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Wu J, Guo W, Wang Y, Liu J, Wang H, Zheng Z, Wang X, Kaplan DL. Stabilization and Sustained Release of Fragrances Using Silk-PEG Microspheres. ACS Biomater Sci Eng 2023. [PMID: 37144723 DOI: 10.1021/acsbiomaterials.3c00064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Fragrances, which are commonly used in food, textiles, consumer products, and medical supplies, are volatile compounds that require stabilization and controlled release due to their sensitivity to environmental conditions such as light, oxygen, temperature, and humidity. Encapsulation in various material matrices is a desired technique for these purposes, and there is a growing interest in using sustainable natural materials to reduce environmental impact. In this study, fragrance encapsulation in microspheres made from silk fibroin (SF) was investigated. Fragrance-loaded silk fibroin microspheres (Fr-SFMSs) were prepared by adding fragrance/surfactant emulsions to silk solutions, followed by mixing them with polyethylene glycol under ambient conditions. The study investigated eight different fragrances, where citral, beta-ionone, and eugenol showed higher binding affinities to silk than the other five fragrances, resulting in better microsphere formation with uniform sizes and higher fragrance loading (10-30%). Citral-SFMSs showed characteristic crystalline β-sheet structures of SF, high thermal stability (initial weight loss at 255 °C), long shelf life at 37 °C (>60 days), and sustained release (∼30% of citral remained after incubation at 60 °C for 24 h). When citral-SFMSs with different sizes were used to treat cotton fabrics, about 80% of the fragrance remained on the fabrics after one wash, and the duration of release from the treated fabrics was significantly longer than that of control samples treated with citral alone (no microspheres). This method of preparing Fr-SFMSs has potential applications in textile finishing, cosmetics, and the food industry.
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Affiliation(s)
- Jianbing Wu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
- College of Textile, Garment and Design, Changshu Institute of Technology, Suzhou 215500, People's Republic of China
| | - Wenjun Guo
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Yongfeng Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Jian Liu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Heng Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Zhaozhu Zheng
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Xiaoqin Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
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Ramsburg CA, Baniahmad P, Muller KA, Robinson AD. Emulsion-based recovery of a multicomponent petroleum hydrocarbon NAPL using nonionic surfactant formulations. JOURNAL OF CONTAMINANT HYDROLOGY 2023; 255:104144. [PMID: 36791614 DOI: 10.1016/j.jconhyd.2023.104144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 01/27/2023] [Accepted: 01/29/2023] [Indexed: 06/18/2023]
Abstract
Surfactants can aid subsurface remediation through three primary mechanisms - solubilization, mobilization and/or emulsification. Among these mechanisms, emulsification in porous media is generally not well studied or well understood; particularly in the context of treating sources containing multicomponent NAPL. The objective of this research was to elucidate the processes responsible for recovery of a multicomponent hydrocarbon NAPL when surfactant solutions are introduced within a porous medium to promote the formation of kinetically-stable oil-in-water emulsions. Emulsifier formulations considered here were selected to offer similar performance characteristics while relying on different families of non-ionic surfactants - nonylphenol ethoxylates or alcohol ethoxylates - for emulsification. The families of surfactants have particular environment relevance, as alcohol ethoxylates are often used where replacement of nonylphenol content is necessary. Results from batch and column studies suggest performance of the two formulations was similar. With both, a synergistic combination of emulsification and mobilization led to recovery of a synthetic gasoline NAPL. The relative contribution of solubilization to the recovery was found to be minor. Moreover, the physical processes associated with emulsification and mobilization acted to limit the amount of preferential recovery (or fractionation) of the multicomponent NAPL.
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Affiliation(s)
- C Andrew Ramsburg
- Department of Civil and Environmental Engineering, Tufts University, 200 College Avenue, Room 204 Anderson Hall, Medford, MA 02155, USA.
| | - Parnian Baniahmad
- Department of Civil and Environmental Engineering, Tufts University, 200 College Avenue, Room 204 Anderson Hall, Medford, MA 02155, USA
| | - Katherine A Muller
- Department of Civil and Environmental Engineering, Tufts University, 200 College Avenue, Room 204 Anderson Hall, Medford, MA 02155, USA
| | - Andrew D Robinson
- Department of Civil and Environmental Engineering, Tufts University, 200 College Avenue, Room 204 Anderson Hall, Medford, MA 02155, USA
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Lodhi APS, Kumar D. Natural ingredients based environmental friendly metalworking fluid with superior lubricity. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.126071] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Size Distribution and Phosphate Removal Capacity of Nano Zero-Valent Iron (nZVI): Influence of pH and Ionic Strength. WATER 2020. [DOI: 10.3390/w12102939] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Nano zero-valent iron (nZVI) has been considered as a promising material for groundwater remediation in the past few decades. The size distribution of nZVI is one of the main factors that influences its transport capability and remediation capacity. However, studies on the size distribution of nZVI under different environmental conditions are still limited. In this study, the influence of the pH (pH = 5, 7, 9) and ionic strength (IS = 0, 15, 30, 45 mM) on the size distribution of nZVI are investigated. The dynamic light scattering (DLS) method is used to study the variation of the size distribution of nZVI aggregate with time, and batch tests are performed to evaluate the efficiency of phosphate removal. Meanwhile, the phosphate removal capacity of nZVI with different size distribution was examined. Experimental results show that under low IS and high pH conditions, nZVI aggregate exhibited a stable, narrow and one-peak size distribution. By contrast, under high IS and low pH conditions, nZVI exhibited a wide and complicated size distribution with multiple peak values. This different pattern in size distribution was further explained by the Derjaguin–Landau–Verwey–Overbeek (DLVO) theory. The phosphate removal rate of nZVI under acidic and neutral conditions is higher than 98% but is only 68% under alkaline conditions. The phosphate removal capacity is insensitive to the variation of IS since the removal rate is higher than 97% for different IS conditions. Favorable environmental conditions for colloidal stability and removal capacity of nZVI can be different, which needs comprehensive consideration in the application.
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Comparative study on properties, mechanisms of anionic dispersant modified nano zero-valent iron for removal of Cr(VI). J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.05.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Yirsaw BD, Megharaj M, Chen Z, Naidu R. Environmental application and ecological significance of nano-zero valent iron. J Environ Sci (China) 2016; 44:88-98. [PMID: 27266305 DOI: 10.1016/j.jes.2015.07.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 07/15/2015] [Accepted: 07/20/2015] [Indexed: 06/06/2023]
Abstract
Toxicity studies considering both the bare and stabilized forms of zero valent iron nanoparticles (nZVI) could be timely, given that ecological risks identified are minimized through modification or with substitution of approaches in the synthesis, development and environmental application of the nanoparticles before succeeding to volume production. This review is focused on the fate, transport and toxicological implications of the bare nZVI and surface modified particles used for environmental applications.
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Affiliation(s)
- Biruck D Yirsaw
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Mawson Lakes SA5095, Australia.
| | - Mallavarapu Megharaj
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Mawson Lakes SA5095, Australia
| | - Zuliang Chen
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Mawson Lakes SA5095, Australia
| | - Ravi Naidu
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Mawson Lakes SA5095, Australia
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Schöftner P, Waldner G, Lottermoser W, Stöger-Pollach M, Freitag P, Reichenauer TG. Electron efficiency of nZVI does not change with variation of environmental parameters. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 535:69-78. [PMID: 26006053 DOI: 10.1016/j.scitotenv.2015.05.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 05/08/2015] [Accepted: 05/08/2015] [Indexed: 06/04/2023]
Abstract
Nanoscale zero-valent iron particles (nZVI) are already applied for in-situ dechlorination of halogenated organic contaminants in the field. We performed batch experiments whereby trichloroethene (TCE) was dehalogenated by nZVI under different environmental conditions that are relevant in practice. The tested conditions include different ionic strengths, addition of polyelectrolytes (carboxymethylcellulose and ligninsulphonate), lowered temperature, dissolved oxygen and different particle contents. Particle properties were determined by Mössbauer spectroscopy, XRD, TEM, SEM, AAS and laser obscuration time measurements. TCE dehalogenation and H2 evolution were decelerated by reduced ionic strength, addition of polyelectrolytes, temperature reduction, the presence of dissolved oxygen and reduced particle content. The partitioning of released electrons between reactions with the contaminant vs. with water (selectivity) was low, independent of the tested conditions. Basically out of hundred electrons that were released via nZVI oxidation only 3.1±1.4 were used for TCE dehalogenation. Even lower selectivities were observed at TCE concentrations below 3.5 mg l(-1), hence particle modifications and/or combination of nZVI with other remediation technologies seem to be necessary to reach target concentrations for remediation. Our results suggest that selectivity is particle intrinsic and not as much condition dependent, hence particle synthesis and potential particle modifications of nZVI particles may be more important for optimization of the pollutant degradation rate, than tested environmental conditions.
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Affiliation(s)
- Philipp Schöftner
- AIT Austrian Institute of Technology GmbH, Konrad-Lorenz-Straße 24, 3430 Tulln a.d. Donau, Austria.
| | - Georg Waldner
- AIT Austrian Institute of Technology GmbH, Konrad-Lorenz-Straße 24, 3430 Tulln a.d. Donau, Austria
| | - Werner Lottermoser
- Salzburg University, FB Materialforschung und Physik, Hellbrunnerstr. 34, 5020 Salzburg, Austria.
| | - Michael Stöger-Pollach
- Technical University of Vienna, Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie - USTEM.
| | - Peter Freitag
- Keller Grundbau Ges. mbH, Mariahilfer Straße 127a, 1150 Vienna, Austria.
| | - Thomas G Reichenauer
- AIT Austrian Institute of Technology GmbH, Konrad-Lorenz-Straße 24, 3430 Tulln a.d. Donau, Austria.
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Pensini E, Yip CM, O’Carroll D, Sleep BE. Carboxymethyl cellulose binding to mineral substrates: Characterization by atomic force microscopy–based Force spectroscopy and quartz-crystal microbalance with dissipation monitoring. J Colloid Interface Sci 2013; 402:58-67. [DOI: 10.1016/j.jcis.2013.03.053] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 03/29/2013] [Accepted: 03/31/2013] [Indexed: 11/26/2022]
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Li B, Du W, Jin J, Du Q. Preservation of (-)-epigallocatechin-3-gallate antioxidant properties loaded in heat treated β-lactoglobulin nanoparticles. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:3477-3484. [PMID: 22409289 DOI: 10.1021/jf300307t] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
(-)-Epigallocatechin-3-gallate (EGCG) was loaded in heat treated β-lactoglobulin (β-Lg) for the preservation of antioxidant activity. The effects of pH (2.5-7.0), the heating temperature of β-Lg (30-85 °C), the molar ratio of β-Lg to EGCG (1:2-1:32), and the β-Lg concentration (1-10 mg/mL) on the properties of β-Lg-EGCG complexes were studied. All four factors significantly influenced the particle size, the ζ-potential, and the entrapment efficiency of EGCG and EGCG loading in β-Lg particles. A stable and clear solution system could be obtained at pH 6.4-7.0. The highest protection of EGCG antioxidant activity was obtained with β-Lg heated at 85 °C and the molar ratio of 1:2 (β-Lg: EGCG). β-Lg-EGCG complexes were found to have the same secondary structure as native β-Lg.
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Affiliation(s)
- Bo Li
- Institute of Food and Biological Engineering, Zhejiang Gongshang University, Hangzhou, China
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Kharisov BI, Rasika Dias HV, Kharissova OV, Manuel Jiménez-Pérez V, Olvera Pérez B, Muñoz Flores B. Iron-containing nanomaterials: synthesis, properties, and environmental applications. RSC Adv 2012. [DOI: 10.1039/c2ra20812a] [Citation(s) in RCA: 253] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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