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Frigerio M, V M Freire R, Soares TA, Amenitsch H, Leser ME, Salentinig S. Interfacial structurization between triolein and water from pH and buffer ions. J Colloid Interface Sci 2024; 665:1091-1101. [PMID: 38548506 DOI: 10.1016/j.jcis.2024.03.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/09/2024] [Accepted: 03/11/2024] [Indexed: 04/17/2024]
Abstract
HYPOTHESIS Understanding and manipulating the oil/water interface is important across various industries, including food, pharmaceuticals, cosmetics, and detergents. Many of these processes occur under elevated pH conditions in buffer systems, where base-catalyzed hydrolysis of triglyceride ester bonds leads to amphiphilic reaction products such as fatty acids. EXPERIMENTS Here, pH-triggered alterations of the triolein/water interface are analyzed in the presence of phosphate (PB) and tris(hydroxymethyl)aminomethane (TRIS). Ellipsometry at the liquid/liquid interface, tensiometry, and scanning small angle X-ray scattering are used to study the formation of structures at the oil/water interface. Confocal Raman microscopy, nuclear magnetic resonance spectroscopy, and in silico modeling analyze compositional changes in the interfacial region. FINDINGS pH and buffer ions were discovered to significantly modify the triglyceride/water interface, contrary to the decane/water control. Decreasing interfacial tensions from 32.4 to 2.2 mN/m upon pH increase from 6.5 to 9.5 is seen with multilamellar interfacial layers forming at pH around 9.0 in the presence of TRIS. Oleic acid from triolein hydrolysis and its further interaction with TRIS is held responsible for this. The new understanding can guide the design of pH- and ion-responsive functional materials and optimize industrial processes involving triglyceride/water interfaces.
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Affiliation(s)
- Matteo Frigerio
- Department of Chemistry, University of Fribourg, Chemin Du Musée 9, 1700 Fribourg, Switzerland
| | - Rafael V M Freire
- Department of Chemistry, University of Fribourg, Chemin Du Musée 9, 1700 Fribourg, Switzerland
| | - Thereza A Soares
- Department of Chemistry, FFCLRP, University of São Paulo, Ribeirão Preto-SP, Brazil; Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, Oslo, Norway
| | - Heinz Amenitsch
- Institute for Inorganic Chemistry, Graz University of Technology, Stremayergasse 9/V, Graz 8010, Austria
| | - Martin E Leser
- Department of Chemistry, University of Fribourg, Chemin Du Musée 9, 1700 Fribourg, Switzerland
| | - Stefan Salentinig
- Department of Chemistry, University of Fribourg, Chemin Du Musée 9, 1700 Fribourg, Switzerland.
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Patel R, Saab LE, Brahana PJ, Valsaraj KT, Bharti B. Interfacial Activity and Surface p Ka of Perfluoroalkyl Carboxylic Acids (PFCAs). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 38330911 PMCID: PMC10883055 DOI: 10.1021/acs.langmuir.3c03398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Perfluoroalkyl carboxylic acids (PFCAs) are widely used synthetic chemicals that are known for their exceptional stability and interfacial activity. Despite their industrial and environmental significance, discrepancies exist in the reported pKa values for PFCAs, often spanning three to four units. These disparities stem from an incomplete understanding of how pH influences the ionized state of PFCA molecules in the bulk solution and at the air-water interface. Using pH titration and surface tension measurements, we show that the pKa values of the PFCAs adsorbed at the air-water interface differ from the bulk. Below the equivalence point, the undissociated and dissociated forms of the PFCAs exist in equilibrium, driving to the spontaneous adsorption and reduced air-water surface tension. Conversely, above the equivalence point, the complete ionization of the headgroup into the carboxylate form renders PFCAs highly hydrophilic, resulting in reduced interfacial activity of the molecules. The distinction in the chemical environments at the interface and bulk results in differences in the pKa of PFCA molecules in the bulk phase and at the air-water interface. We explore the effects of the fluoroalkyl tail length of PFCAs on their surface pKa and interfacial activity across a broad pH range. We further demonstrate the influence of pH-dependent ionized state of PFCAs on their foamability and the rate of microdroplet evaporation, understanding of which is crucial for optimizing their industrial applications and developing effective strategies for their environmental remediation. This study underscores the potential significance of pH in directing the interfacial activity of PFCAs and prompts the inclusion of pH as a key determinant in the predictions of their fate and potential risks in the environment.
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Affiliation(s)
- Ruchi Patel
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Luis E Saab
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Philip J Brahana
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Kalliat T Valsaraj
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Bhuvnesh Bharti
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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Wu C, Jia H, Almuaalemi HYM, Sohan ASMMF, Yin B. Preparation and Analysis of Structured Color Janus Droplets Based on Microfluidic 3D Droplet Printing. MICROMACHINES 2023; 14:1911. [PMID: 37893348 PMCID: PMC10609099 DOI: 10.3390/mi14101911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 10/05/2023] [Accepted: 10/05/2023] [Indexed: 10/29/2023]
Abstract
The microfluidic technique for the three-dimensional (3D) printing of Janus droplets offers precise control over their size, orientation, and positioning. The proposed approach investigates the impact of variables such as the volume ratio of the oil phase, droplet size, and the ratio of nonionic surfactants on the dimensions of the structured color apertures of Janus droplets. The findings reveal that structured color apertures modulate accurately. Furthermore, fabricating color patterns facilitates cat, fish, and various other specific shapes using structured color Janus droplets. The color patterns exhibit temperature-sensitive properties, enabling them to transition between display and concealed states. Herein, the adopted microfluidic technique creates Janus droplets with customizable characteristics and uniform size, solving orientation as well as space arrangement problems. This approach holds promising applications for optical devices, sensors, and biomimetic systems.
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Affiliation(s)
- Chuang Wu
- School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China; (H.J.); (H.Y.M.A.)
| | - Hanqi Jia
- School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China; (H.J.); (H.Y.M.A.)
| | | | | | - Binfeng Yin
- School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China; (H.J.); (H.Y.M.A.)
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Lobo RR, Watson M, Vinyard JR, Johnson ML, Bahmam A, Ma SW, Dagaew G, Sumadong P, Sarmikasoglou E, Grilli E, Arce-Cordero JA, Faciola AP. In vitro evaluation of microencapsulated organic acids and pure botanicals as a supplement in lactating dairy cows diet on in vitro ruminal fermentation. Transl Anim Sci 2023; 7:txad099. [PMID: 37701126 PMCID: PMC10494880 DOI: 10.1093/tas/txad099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 08/17/2023] [Indexed: 09/14/2023] Open
Abstract
The utilization of microencapsulated organic acids and pure botanicals (mOAPB) is widely used in the monogastric livestock industry as an alternative to antibiotics; in addition, it can have gut immunomodulatory functions. More recently, an interest in applying those compounds in the ruminant industry has increased; thus, we evaluated the effects of mOAPB on ruminal fermentation kinetics and metabolite production in an in vitro dual-flow continuous-culture system. For this study, two ruminal cannulated lactating dairy Holstein cows were used as ruminal content donors, and the inoculum was incubated in eight fermenters arranged in a 4 × 4 Latin square design. The basal diet was formulated to meet the nutritional requirements of a 680-kg Holstein dairy cow producing 45 kg/d of milk and supplemented with increasing levels of mOAPB (0; 0.12; 0.24; or 0.36% of dry matter [DM]), which contained 55.6% hydrogenated and refined palm oil, 25% citric acid, 16.7% sorbic acid, 1.7% thymol, and 1% vanillin. Diet had 16.1 CP, 30.9 neutral detergent fiber (NDF), and 32.0 starch, % of DM basis, and fermenters were fed 106 g/d split into two feedings. After a 7 d adaptation, samples were collected for 3 d in each period. Samples of the ruminal content from the fermenters were collected at 0, 1, 2, 4, 6, and 8 h postmorning feeding for evaluation of the ruminal fermentation kinetics. For the evaluation of the daily production of total metabolites and for the evaluation of nutrient degradability, samples from the effluent containers were collected daily at days 8 to 10. The statistical analysis was conducted using MIXED procedure of SAS and treatment, time, and its interactions were considered as fixed effects and day, Latin square, and fermenter as random effects. To depict the treatment effects, orthogonal contrasts were used (linear and quadratic). The supplementation of mOAPB had no major effects on the ruminal fermentation, metabolite production, and degradability of nutrients. The lack of statistical differences between control and supplemented fermenters indicates effective ruminal protection and minor ruminal effects of the active compounds. This could be attributed to the range of daily variation of pH, which ranged from 5.98 to 6.45. The pH can play a major role in the solubilization of lipid coat. It can be concluded that mOAPB did not affect the ruminal fermentation, metabolite production, and degradability of dietary nutrients using an in vitro rumen simulator.
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Affiliation(s)
- Richard R Lobo
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - Michael Watson
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - James R Vinyard
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - Mikayla L Johnson
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - Aneesa Bahmam
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - Szu-Wei Ma
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - Gamonmas Dagaew
- Department of Animal Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Phussorn Sumadong
- Department of Animal Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | | | - Ester Grilli
- Dipartimento di Scienze Mediche Veterinarie, Università di Bologna, Bologna 40064, Italy
- Vetagro S.p.A., Reggio Emilia 42124, Italy
| | - Jose A Arce-Cordero
- Escuela de Zootecnia, Universidad de Costa Rica, San José 11501-2060, Costa Rica
| | - Antonio P Faciola
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
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Grady BP. Surfactant mixtures: A short review. J SURFACTANTS DETERG 2022. [DOI: 10.1002/jsde.12642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Brian P. Grady
- School of Chemical, Biological and Materials Engineering and Institute of Applied Surfactant Research University of Oklahoma Norman Oklahoma USA
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Hsieh TL, Garoff S, Tilton RD. Marangoni spreading time evolution and synergism in binary surfactant mixtures. J Colloid Interface Sci 2022; 623:685-696. [DOI: 10.1016/j.jcis.2022.05.063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 11/30/2022]
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Huo Q, Gao Y, Wu W, Hu S, Zhang Z, Li Z, Tian Y, Quan P, Li W, Liu D. Colloidal Jamming by Interfacial Self‐Assembled Polymers: A Robust Route for Ultrahigh Efficient Encapsulation. Angew Chem Int Ed Engl 2022; 61:e202208738. [DOI: 10.1002/anie.202208738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Qingqing Huo
- State Key Laboratory of Natural Medicines Department of Pharmaceutical Science China Pharmaceutical University Nanjing 210009 China
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical University Nanjing 210009 China
| | - Yue Gao
- State Key Laboratory of Natural Medicines Department of Pharmaceutical Science China Pharmaceutical University Nanjing 210009 China
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical University Nanjing 210009 China
| | - Wenbo Wu
- State Key Laboratory of Natural Medicines Department of Pharmaceutical Science China Pharmaceutical University Nanjing 210009 China
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical University Nanjing 210009 China
| | - Shuai Hu
- State Key Laboratory of Natural Medicines Department of Pharmaceutical Science China Pharmaceutical University Nanjing 210009 China
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical University Nanjing 210009 China
| | - Zifan Zhang
- State Key Laboratory of Natural Medicines Department of Pharmaceutical Science China Pharmaceutical University Nanjing 210009 China
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical University Nanjing 210009 China
| | - Zhi Li
- State Key Laboratory of Natural Medicines Department of Pharmaceutical Science China Pharmaceutical University Nanjing 210009 China
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical University Nanjing 210009 China
| | - Yuling Tian
- State Key Laboratory of Natural Medicines Department of Pharmaceutical Science China Pharmaceutical University Nanjing 210009 China
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical University Nanjing 210009 China
| | - Peng Quan
- Department of Pharmaceutical Science, School of Pharmacy Shenyang Pharmaceutical University Shenyang 110016 China
| | - Wen Li
- International Joint Laboratory of Biomimetic and Smart Polymers School of Materials Science and Engineering Shanghai University Shanghai 200444 China
| | - Dongfei Liu
- State Key Laboratory of Natural Medicines Department of Pharmaceutical Science China Pharmaceutical University Nanjing 210009 China
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical University Nanjing 210009 China
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Huo Q, Gao Y, Wu W, Hu S, Zhang Z, Li Z, Tian Y, Quan P, Li W, Liu D. Colloidal Jamming by Interfacial Self‐Assembled Polymers: A Robust Route for Ultrahigh Efficient Encapsulation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Qingqing Huo
- China Pharmaceutical University School of Pharmacy Longmian Avenue No. 639 211198 Nanjing CHINA
| | - Yue Gao
- China Pharmaceutical University School of Pharmacy Longmian Avenue No. 639 211198 Nanjing CHINA
| | - Wenbo Wu
- China Pharmaceutical University School of Pharmacy Longmian Avenue No. 639 211198 Nanjing CHINA
| | - Shuai Hu
- China Pharmaceutical University School of Pharmacy Longmian Avenue No. 639 210009 Nanjing CHINA
| | - Zifan Zhang
- China Pharmaceutical University School of Pharmacy Longmian Avenue No. 639 210009 Nanjing CHINA
| | - Zhi Li
- China Pharmaceutical University School of Pharmacy Longmian Avenue No. 639 211198 Nanjing CHINA
| | - Yuling Tian
- China Pharmaceutical University School of Pharmacy Longmian Avenue No. 639 211198 Nanjing CHINA
| | - Peng Quan
- Shenyang Pharmaceutical University School of Pharmacy Wenhua Road No. 103 110016 Shenyang CHINA
| | - Wen Li
- Shanghai University School of Materials Science and Engineering Shangda Street 99 200444 Shanghai CHINA
| | - Dongfei Liu
- China Pharmaceutical University School of Pharmacy Longmian Avenue No. 639 211198 Nanjing CHINA
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Numerical simulation of the Marangoni flow on mass transfer from single droplet with different Reynolds numbers. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128385] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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