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Das S, Chaudhari AK, Singh VK, Dwivedy AK, Dubey NK. Chitosan based encapsulation of Valeriana officinalis essential oil as edible coating for inhibition of fungi and aflatoxin B 1 contamination, nutritional quality improvement, and shelf life extension of Citrus sinensis fruits. Int J Biol Macromol 2023; 233:123565. [PMID: 36740131 DOI: 10.1016/j.ijbiomac.2023.123565] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/05/2023]
Abstract
In this study, a novel chitosan nanoemulsion coating embedded with Valeriana officinalis essential oil (Ne-VOEO) was synthesized in order to improve the postharvest quality of Citrus sinensis fruits against infesting fungi, and aflatoxin B1 (AFB1) mediated nutritional deterioration. The developed nanoemulsion was characterized through SEM, FTIR, XRD, and DLS analyses. The nanoemulsion showed controlled delivery of VOEO responsible for effective inhibition of Aspergillus flavus, A. niger, A. versicolor, Penicillium italicum, and Fusarium oxysporum growth at 6.5, 5.0, 4.0, 5.5, and 3.5 μL/mL, respectively and AFB1 production at 5.0 μL/mL. The biochemical and molecular mechanism of aflatoxigenic A. flavus inhibition, and AFB1 diminution was associated with impairment in ergosterol biosynthesis, methylglyoxal production, and stereo-spatial binding of valerianol in the cavity of Ver-1 protein. During in vivo investigation, Ne-VOEO coating potentially restrained the weight loss, and respiratory rate of C. sinensis fruits with delayed degradation of soluble solids, titrable acidity, pH, and phenolic contents along with maintenance of SOD, CAT, APX activities (p < 0.05) and sensory attributes under specific storage conditions. Based on overall findings, Ne-VOEO nanoemulsion could be recommended as green, and smart antifungal coating agent in prolonging the shelf-life of stored fruits with enhanced AFB1 mitigation.
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Affiliation(s)
- Somenath Das
- Department of Botany, Burdwan Raj College, Purba Bardhaman, 713104, West Bengal, India.
| | - Anand Kumar Chaudhari
- Department of Botany, Government Girls' P.G. College, Ghazipur 233001, Uttar Pradesh, India
| | - Vipin Kumar Singh
- Department of Botany, K. S. Saket P. G. College, Ayodhya 224123, Uttar Pradesh, India
| | - Abhishek Kumar Dwivedy
- Laboratory of Herbal Pesticides, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Nawal Kishore Dubey
- Laboratory of Herbal Pesticides, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
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Khaligh SF, Asoodeh A. Green synthesis and biological characterization of cerium oxide nanoemulsion against human HT-29 colon cancer cell line. MATERIALS TECHNOLOGY 2022; 37:2318-2338. [DOI: 10.1080/10667857.2022.2031492] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 01/12/2022] [Indexed: 09/22/2023]
Affiliation(s)
| | - Ahmad Asoodeh
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
- Cellular and Molecular Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran
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Badr MM, Badawy MEI, Taktak NEM. Preparation, characterization, and antimicrobial activity of cinnamon essential oil and cinnamaldehyde nanoemulsions. JOURNAL OF ESSENTIAL OIL RESEARCH 2022. [DOI: 10.1080/10412905.2022.2107100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Mai M. Badr
- Department of Environmental Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt
| | - Mohamad E. I. Badawy
- Department of Pesticide Chemistry and Technology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt
| | - Nehad E. M. Taktak
- Department of Environmental Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt
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Kildaci I, Budama-Kilinc Y, Kecel-Gunduz S, Altuntas E. Linseed Oil Nanoemulsions for treatment of Atopic Dermatitis disease: Formulation, characterization, in vitro and in silico evaluations. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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5
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Oil-in-water nanoemulsion with reversible charge prepared by the phase inversion composition method. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Sanghamitra P, Mazumder D, Mukherjee S. Treatment of wastewater containing oil and grease by biological method- a review. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:394-412. [PMID: 33573477 DOI: 10.1080/10934529.2021.1884468] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 01/26/2021] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
One of the complex environmental problems that triggers at present is oily wastewater contamination arising out of the activities related to engineering vehicular (automobile) workshop or garage, kitchens in houses and restaurants, gas stations, metal finishing house, petrochemical industry, edible oil production unit etc. Oily wastewater discharge is a major issue of environmental pollution in the present decade as some of its constituents are hazardous in nature. Hence, appropriate treatment technology for oily wastewater needs to be addressed. Biological treatment (BT) technique would be the best option in this regard, because it has multiple advantages over various other techniques as available today. BT degrades effectively the harmful constituents of oily wastewater into innocuous products that are environment friendly and it is considered to be the economical method. The resulting effluent of pretreatment followed by biological treatment of oily wastewater can be reused after conforming discharge limits. Again, numerous research works in these days have optimized the function and result of existing laboratory and pilot scale treatment technologies. This review paper describes a comprehensive understanding of the origin and characteristics, existing techniques in laboratory and pilot scale, screening of different methods, justification for advocating biological methods for treatment of oily wastewater.
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Affiliation(s)
- P Sanghamitra
- Civil Engineering Department, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, India
| | - Debabrata Mazumder
- Civil Engineering Department, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, India
| | - Somnath Mukherjee
- Civil Engineering Department, Jadavpur University, Kolkata, West Bengal, India
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Liu WQ, Yang SZ, Gang HZ, Mu BZ, Liu JF. Efficient emulsifying properties of monoglycerides synthesized via simple and green route. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1638271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Wan-Qing Liu
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Shi-Zhong Yang
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Hong-Ze Gang
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Bo-Zhong Mu
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology, Shanghai, P.R. China
| | - Jin-Feng Liu
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
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Zhang J, Song Y, Li D. Electrokinetic motion of a micro oil droplet under a glass slide. Electrophoresis 2019; 40:1034-1040. [DOI: 10.1002/elps.201800406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 11/27/2018] [Accepted: 12/10/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Junyan Zhang
- Department of Marine EngineeringDalian Maritime University Dalian P. R. China
| | - Yongxin Song
- Department of Marine EngineeringDalian Maritime University Dalian P. R. China
| | - Dongqing Li
- Department of Mechanical and Mechatronics EngineeringUniversity of Waterloo Waterloo ON Canada
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Yuliani S, Muchtadi TR, Syakir M. Changes in characteristics of nanoemulsion of cinnamon oil and their relationships with instability mechanisms during storage. J FOOD PROCESS PRES 2018. [DOI: 10.1111/jfpp.13745] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sri Yuliani
- Indonesian Center for Agricultural Postharvest Research and Development Bogor Indonesia
| | - Tien R. Muchtadi
- Departement of Food Science and Technology Bogor Agricultural University Bogor Indonesia
| | - M. Syakir
- Indonesian Agency for Agricultural Research and Development Bogor Indonesia
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Witayaudom P, Klinkesorn U. Effect of surfactant concentration and solidification temperature on the characteristics and stability of nanostructured lipid carrier (NLC) prepared from rambutan (Nephelium lappaceum L.) kernel fat. J Colloid Interface Sci 2017; 505:1082-1092. [DOI: 10.1016/j.jcis.2017.07.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 06/27/2017] [Accepted: 07/02/2017] [Indexed: 11/16/2022]
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12
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Ortega-Toro R, Jiménez A, Talens P, Chiralt A. Effect of the incorporation of surfactants on the physical properties of corn starch films. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.11.011] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Klinkesorn U. The Role of Chitosan in Emulsion Formation and Stabilization. FOOD REVIEWS INTERNATIONAL 2013. [DOI: 10.1080/87559129.2013.818013] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Tang SY, Sivakumar M. A novel and facile liquid whistle hydrodynamic cavitation reactor to produce submicron multiple emulsions. AIChE J 2012. [DOI: 10.1002/aic.13800] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Siah Ying Tang
- Dept. of Chemical and Environmental Engineering; Faculty of Engineering; The University of Nottingham; Malaysia Campus; Jalan Broga; Semenyih; 43500; Malaysia
| | - Manickam Sivakumar
- Dept. of Chemical and Environmental Engineering; Faculty of Engineering; The University of Nottingham; Malaysia Campus; Jalan Broga; Semenyih; 43500; Malaysia
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Tang SY, Manickam S, Wei TK, Nashiru B. Formulation development and optimization of a novel Cremophore EL-based nanoemulsion using ultrasound cavitation. ULTRASONICS SONOCHEMISTRY 2012; 19:330-345. [PMID: 21835676 DOI: 10.1016/j.ultsonch.2011.07.001] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 07/07/2011] [Accepted: 07/07/2011] [Indexed: 05/28/2023]
Abstract
In the present study, response surface methodology (RSM) based on central composite design (CCD) was employed to investigate the influence of main emulsion composition variables, namely drug loading, oil content, emulsifier content as well as the effect of the ultrasonic operating parameters such as pre-mixing time, ultrasonic amplitude, and irradiation time on the properties of aspirin-loaded nanoemulsions. The two main emulsion properties studied as response variables were: mean droplet size and polydispersity index. The ultimate goal of the present work was to determine the optimum level of the six independent variables in which an optimal aspirin nanoemulsion with desirable properties could be produced. The response surface analysis results clearly showed that the variability of two responses could be depicted as a linear function of the content of main emulsion compositions and ultrasonic processing variables. In the present investigation, it is evidently shown that ultrasound cavitation is a powerful yet promising approach in the controlled production of aspirin nanoemulsions with smaller average droplet size in a range of 200-300 nm and with a polydispersity index (PDI) of about 0.30. This study proved that the use of low frequency ultrasound is of considerable importance in the controlled production of pharmaceutical nanoemulsions in the drug delivery system.
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Affiliation(s)
- Siah Ying Tang
- Department of Chemical and Environmental Engineering, Faculty of Engineering, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Malaysia
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Tang SY, Sivakumar M. Design and evaluation of aspirin-loaded water-in-oil-in-water submicron multiple emulsions generated using two-stage ultrasonic cavitational emulsification technique. ASIA-PAC J CHEM ENG 2012. [DOI: 10.1002/apj.664] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Siah Ying Tang
- Department of Chemical and Environmental Engineering; University of Nottingham Malaysia Campus; Jalan Broga 43500 Semenyih Malaysia
| | - Manickam Sivakumar
- Department of Chemical and Environmental Engineering; University of Nottingham Malaysia Campus; Jalan Broga 43500 Semenyih Malaysia
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Li PH, Chiang BH. Process optimization and stability of D-limonene-in-water nanoemulsions prepared by ultrasonic emulsification using response surface methodology. ULTRASONICS SONOCHEMISTRY 2012; 19:192-197. [PMID: 21680223 DOI: 10.1016/j.ultsonch.2011.05.017] [Citation(s) in RCA: 151] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2011] [Revised: 05/18/2011] [Accepted: 05/23/2011] [Indexed: 05/30/2023]
Abstract
D-limonene in water nanoemulsion was prepared by ultrasonic emulsification using mixed surfactants of sorbitane trioleate and polyoxyethylene (20) oleyl ether. Investigation using response surface methodology revealed that 10% d-limonene nanoemulsions formed at S0 ratio (D-limonene concentration to mixed surfactant concentration) 0.6-0.7 and applied power 18 W for 120 s had droplet size below 100 nm. The zeta potential of the nanoemulsion was approximately -20 mV at original pH 6.4, closed to zero around pH 4.0, and around -30 mV at pH 12.0. The main destabilization mechanism of the systems is Ostwald ripening. The ripening rate at 25 °C (0.39 m3 s(-1)×10(29)) was lower than that at 4 °C (1.44 m3 s(-1)×10(29)), which was in agreement with the Lifshitz-Slezov-Wagner (LSW) theory. Despite of Ostwald ripening, the droplet size of d-limonene nanoemulsion remained stable after 8 weeks of storage.
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Affiliation(s)
- Po-Hsien Li
- Institute of Food Science and Technology, National Taiwan University, 1 Sec. 4 Roosevelt Road, Taipei 10617, Taiwan, ROC
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Han NS, Basri M, Abd. Rahman MB, Zaliha Raja Abd. Rahman RN, Salleh AB, Ismail Z. Phase Behavior and Formulation of Palm Oil Esters o/w Nanoemulsions Stabilized by Hydrocolloid Gums for Cosmeceuticals Application. J DISPER SCI TECHNOL 2011. [DOI: 10.1080/01932691.2010.513301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Tandon V, Kirby BJ. Ambient pressure effects on the electrokinetic potential of Zeonor–water interfaces. J Colloid Interface Sci 2011; 361:381-7. [DOI: 10.1016/j.jcis.2011.05.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 05/10/2011] [Accepted: 05/13/2011] [Indexed: 11/29/2022]
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20
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Santos ODH, Morais JM, Andrade FF, Aguiar TA, Rocha Filho PA. Development of Vegetable Oil Emulsions with Lamellar Liquid-Crystalline Structures. J DISPER SCI TECHNOL 2011. [DOI: 10.1080/01932691003662464] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Klinkesorn U, Namatsila Y. Influence of chitosan and NaCl on physicochemical properties of low-acid tuna oil-in-water emulsions stabilized by non-ionic surfactant. Food Hydrocoll 2009. [DOI: 10.1016/j.foodhyd.2008.11.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Stability of oil-in-water nano-emulsions prepared using the phase inversion composition method. J IND ENG CHEM 2009. [DOI: 10.1016/j.jiec.2009.01.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Gray-Weale A, Beattie JK. An explanation for the charge on water’s surface. Phys Chem Chem Phys 2009; 11:10994-1005. [DOI: 10.1039/b901806a] [Citation(s) in RCA: 126] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Allende D, Cambiella Á, Benito J, Pazos C, Coca J. Destabilization‐Enhanced Centrifugation of Metalworking Oil‐in‐Water Emulsions: Effect of Demulsifying Agents. Chem Eng Technol 2008. [DOI: 10.1002/ceat.200700018] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Tandon V, Bhagavatula SK, Nelson WC, Kirby BJ. Zeta potential and electroosmotic mobility in microfluidic devices fabricated from hydrophobic polymers: 1. The origins of charge. Electrophoresis 2008; 29:1092-101. [PMID: 18306184 DOI: 10.1002/elps.200700734] [Citation(s) in RCA: 145] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper combines new experimental data for electrokinetic characterization of hydrophobic polymers with a detailed discussion of the putative origins of charge at water-hydrophobe interfaces. Complexities in determining the origin of charge are discussed in the context of design and modeling challenges for electrokinetic actuation in hydrophobic microfluidic devices with aqueous working fluids. Measurements of interfacial charge are complicated by slip and interfacial water structuring phenomena (see Part 2, this issue). Despite these complexities, it is shown that (i) several hydrophobic materials, such as Teflon and Zeonor, have predictable electrokinetic properties and (ii) electrokinetic data for hydrophobic microfluidic systems is most consistent with the postulate that hydroxyl ion adsorption is the origin of charge.
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Affiliation(s)
- Vishal Tandon
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
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Liu W, Sun D, Li C, Liu Q, Xu J. Formation and stability of paraffin oil-in-water nano-emulsions prepared by the emulsion inversion point method. J Colloid Interface Sci 2006; 303:557-63. [PMID: 16905141 DOI: 10.1016/j.jcis.2006.07.055] [Citation(s) in RCA: 180] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2006] [Revised: 07/21/2006] [Accepted: 07/23/2006] [Indexed: 10/24/2022]
Abstract
Paraffin oil-in-water nano-emulsions stabilized by Tween 80/Span 80 were prepared using the emulsion inversion point method at different emulsification temperatures. Nano-emulsions with droplet size below 200 nm were formed above a critical surfactant-to-oil ratio of 0.20 at 50 degrees C. The main destabilization mechanism of the systems was found to be Ostwald ripening. An interesting phenomenon was that the Ostwald ripening rate declined as the surfactant concentration rose. Furthermore, flocculation was also found to contribute to the instability of the nano-emulsions, especially for those with low surfactant concentrations. Study on the electrophoretic properties of emulsion droplets revealed a negative value of the zeta potential, which was strongly dependent on the pH of the systems.
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Affiliation(s)
- Weirong Liu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University, Jinan, Shandong 250100, People's Republic of China
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de Morais JM, dos Santos ODH, Delicato T, da Rocha‐Filho PA. Characterization and Evaluation of Electrolyte Influence on Canola Oil/Water Nano‐Emulsion. J DISPER SCI TECHNOL 2006. [DOI: 10.1080/01932690600767056] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Moreira de Morais J, David Henrique dos Santos O, Delicato T, Azzini Gonçalves R, Alves da Rocha‐Filho P. Physicochemical Characterization of Canola Oil/Water Nano‐emulsions Obtained by Determination of Required HLB Number and Emulsion Phase Inversion Methods. J DISPER SCI TECHNOL 2006. [DOI: 10.1081/dis-200066829] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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29
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Hsu JP, Nacu A. Behavior of soybean oil-in-water emulsion stabilized by nonionic surfactant. J Colloid Interface Sci 2006; 259:374-81. [PMID: 16256518 DOI: 10.1016/s0021-9797(02)00207-2] [Citation(s) in RCA: 143] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2002] [Accepted: 12/16/2002] [Indexed: 12/01/2022]
Abstract
A soybean oil-in-water emulsion was prepared using nonionic Tween series surfactants. The effects of temperature, hydrophilic-lipophilic balance (HLB) value of the surfactant, and surfactant-to-oil ratio on the size of emulsion drops were investigated with an acoustic and electroacoustic devices. In the case of Tween 85, the influence of pH and electrolyte on the zeta potential of emulsion drops was examined. zeta potential appears to be strongly dependent on pH, varying in the case of high concentrations of NaCl from +60 to -90 mV. High concentrations of Na+ and K+ are capable of separating the oil phase from the emulsion. Divalent cations such as Ca2+ and Mg2+ lead to two points of zero charge at high concentrations, which is not observed for the case of hydrolyzable trivalent species like Al3+ and Fe3+.
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Affiliation(s)
- Jyh-Ping Hsu
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617 Taiwan, ROC.
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Niraula B, King TC, Chun TK, Misran M. Rheology properties of glucopyranoside stabilized oil–water emulsions: effect of alkyl chain length and bulk concentration of the surfactant. Colloids Surf A Physicochem Eng Asp 2004. [DOI: 10.1016/j.colsurfa.2004.08.071] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Al-Shamrani AA, James A, Xiao H. Destabilisation of oil-water emulsions and separation by dissolved air flotation. WATER RESEARCH 2002; 36:1503-1512. [PMID: 11996340 DOI: 10.1016/s0043-1354(01)00347-5] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The roles of aluminium and ferric sulphates as destabilising agents for oil-water emulsions that have been stabilised by a non-ionic surfactant (Span 20) are investigated in terms of oil removal. The effects of coagulant dose, pH, and the duration and intensity of both slow and fast mixing are considered. Electrokinetic measurements indicate that oil droplets have a negative zeta potential that is weakly dependent on pH. The chosen coagulants are shown to be effective in reducing the zeta potential of the oil droplets, and charge reversal was observed for aluminium sulphate. Oil removals up to 99.3% at pH 8 and 99.94% at pH 7 are seen for aluminium sulphate and ferric sulphate respectively. Rapid mixing times of around 120 s and flocculation times ranging from 15 to 20 min appear to be optimal for the DAF separation. It is concluded that relatively low average mixing speeds for coagulation and flocculation are essential for efficient operation.
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Affiliation(s)
- A A Al-Shamrani
- The University of Manchester Institute of Science and Technology UMIST, Department of Chemical Engineering, UK
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