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The Demulsification Properties of Cationic Hyperbranched Polyamidoamines for Polymer Flooding Emulsions and Microemulsions. Processes (Basel) 2020. [DOI: 10.3390/pr8020176] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Polymer flooding emulsions and microemulsions caused by tertiary oil recovery technologies are harmful to the environment due to their excellent stability. Two cationic hyperbranched polyamidoamines (H-PAMAM), named as H-PAMAM-HA and H-PAMAM-ETA, were obtained by changing the terminal denotation agents to H-PAMAM, which was characterized by 1H NMR, FT-IR, and amine possession, thereby confirmed the modification. Samples (300 mg/L) were added to the polymer flooding emulsion (1500 mg/L oil concentration) at 30 °C for 30 min and the H-PAMAM-HA and H-PAMAM-ETA were shown to perform at 88% and 91% deoil efficiency. Additionally, the increased settling time and the raised temperature enhanced performance. For example, an oil removal ratio of 97.7% was observed after dealing with the emulsion for 30 min at 60 °C, while 98.5% deoil efficiency was obtained after 90 min at 45 °C for the 300 mg/L H-PAMAM-ETA. To determine the differences when dealing with the emulsion, the interfacial tension, ζ potential, and turbidity measurements were fully estimated. Moreover, diametrically different demulsification mechanisms were found when the samples were utilized to treat the microemulsion. The modified demulsifiers showed excellent demulsification efficiency via their obvious electroneutralization and bridge functions, while the H-PAMAM appeared to enhance the stability of the microemulsion.
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2
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Bao H, Xing H, Liu M, Zhang Q, Yan H, Liu J. Effects of polymer concentration and type on the interactions between 1-methyl-3-tetradecylimidazolium bromide and polymers in aqueous solution. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1651204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Hongcui Bao
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage & Novel Cell Technology, Liaocheng University, Liaocheng, Shandong, P. R. China
| | - Huaigeng Xing
- College of Pharmacy, Liaocheng University, Liaocheng, Shandong, P. R. China
| | - Min Liu
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage & Novel Cell Technology, Liaocheng University, Liaocheng, Shandong, P. R. China
| | - Qian Zhang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage & Novel Cell Technology, Liaocheng University, Liaocheng, Shandong, P. R. China
| | - Hui Yan
- College of Pharmacy, Liaocheng University, Liaocheng, Shandong, P. R. China
| | - Jie Liu
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage & Novel Cell Technology, Liaocheng University, Liaocheng, Shandong, P. R. China
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3
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Li P, Penfold J, Thomas RK, Xu H. Multilayers formed by polyelectrolyte-surfactant and related mixtures at the air-water interface. Adv Colloid Interface Sci 2019; 269:43-86. [PMID: 31029983 DOI: 10.1016/j.cis.2019.04.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/13/2019] [Accepted: 04/13/2019] [Indexed: 01/01/2023]
Abstract
The structure and occurrence of multilayered adsorption at the air-water interface of surfactants in combination with other oppositely charged species is reviewed. The main species that trigger multilayer formation are multiply charged metal, oligo- and polyions. The structures vary from the attachment of one or two more or less complete surfactant bilayers to the initial surfactant monolayer at the air-water interface to the attachment of a greater number of bilayers with a more defective structure. The majority of the wide range of observations of such structures have been made using neutron reflectometry. The possible mechanisms for the attraction of surfactant bilayers to an air-water interface are discussed and particular attention is given to the question of whether these structures are true equilibrium structures.
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Affiliation(s)
- Peixun Li
- STFC, Rutherford-Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0RA, United Kingdom
| | - Jeffery Penfold
- STFC, Rutherford-Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0RA, United Kingdom
| | - Robert K Thomas
- Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford, OX1 3QZ, United Kingdom.
| | - Hui Xu
- KLK OLEO, Room 1603, 16th Floor, LZY Tower, 4711 Jiao Tong Road, Putuo District, Shanghai 200331, China
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4
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Ma M, Yang Y, Liu Y, Li W, Chen G, Ma Y, Lyu P, Li S, Wang Y, Wu G. Preparation of magnetic Fe
3
O
4
/P (GMA‐DVB)‐PEI/Pd highly efficient catalyst with core‐shell structure. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4850] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Mingliang Ma
- School of Civil EngineeringQingdao University of Technology Qingdao 266033 People's Republic of China
| | - Yuying Yang
- School of Civil EngineeringQingdao University of Technology Qingdao 266033 People's Republic of China
| | - Yanyan Liu
- Centre For Engineering Test & AppraiseQingdao University of Technology Qingdao 266033 People's Republic of China
| | - Wenting Li
- School of Civil EngineeringQingdao University of Technology Qingdao 266033 People's Republic of China
| | - Guopeng Chen
- School of Civil EngineeringQingdao University of Technology Qingdao 266033 People's Republic of China
| | - Yong Ma
- School of Material Science and EngineeringShandong University of Science and Technology Qingdao 266590 People's Republic of China
| | - Ping Lyu
- School of Civil EngineeringQingdao University of Technology Qingdao 266033 People's Republic of China
| | - Shunhe Li
- School of Civil EngineeringQingdao University of Technology Qingdao 266033 People's Republic of China
| | - Yubao Wang
- School of Chemistry and Materials ScienceLudong University Yantai 264025 People's Republic of China
| | - Guanglei Wu
- Institute of Materials for Energy and Environment, State Key Laboratory of Bio‐fibers and Eco‐textiles, College of Materials Science and EngineeringQingdao University Qingdao 266071 People's Republic of China
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5
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Niga P, Hansson-Mille PM, Swerin A, Claesson PM, Schoelkopf J, Gane PAC, Bergendal E, Tummino A, Campbell RA, Magnus Johnson C. Interactions between model cell membranes and the neuroactive drug propofol. J Colloid Interface Sci 2018; 526:230-243. [PMID: 29734090 DOI: 10.1016/j.jcis.2018.03.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/12/2018] [Accepted: 03/14/2018] [Indexed: 12/13/2022]
Abstract
Vibrational sum frequency spectroscopy (VSFS) complemented by surface pressure isotherm and neutron reflectometry (NR) experiments were employed to investigate the interactions between propofol, a small amphiphilic molecule that currently is the most common general anaesthetic drug, and phospholipid monolayers. A series of biologically relevant saturated phospholipids of varying chain length from C18 to C14 were spread on either pure water or propofol (2,6-bis(1-methylethyl)phenol) solution in a Langmuir trough, and the change in the molecular structure of the film, induced by the interaction with propofol, was studied with respect to the surface pressure. The results from the surface pressure isotherm experiments revealed that propofol, as long as it remains at the interface, enhances the fluidity of the phospholipid monolayer. The VSF spectra demonstrate that for each phospholipid the amount of propofol in the monolayer region decreases with increasing surface pressure. Such squeeze out is in contrast to the enhanced interactions that can be exhibited by more complex amphiphilic molecules such as peptides. At surface pressures of 22-25 mN m-1, which are relevant for biological cell membranes, most of the propofol has been expelled from the monolayer, especially in the case of the C16 and C18 phospholipids that adopt a liquid condensed phase packing of its alkyl tails. At lower surface pressures of 5 mN m-1, the effect of propofol on the structure of the alkyl tails is enhanced when the phospholipids are present in a liquid expanded phase. Specifically, for the C16 phospholipid, NR data reveal that propofol is located exclusively in the head group region, which is rationalized in the context of previous studies. The results imply a non-homogeneous distribution of propofol in the plane of real cell membranes, which is an inference that requires urgent testing and may help to explain why such low concentration of the drug are required to induce general anaesthesia.
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Affiliation(s)
- Petru Niga
- RISE - Research Institute of Sweden, Bioscience and Materials - Surface, Process and Formulation Box 5607, SE-114 28 Stockholm, Sweden.
| | - Petra M Hansson-Mille
- RISE - Research Institute of Sweden, Bioscience and Materials - Surface, Process and Formulation Box 5607, SE-114 28 Stockholm, Sweden
| | - Agne Swerin
- RISE - Research Institute of Sweden, Bioscience and Materials - Surface, Process and Formulation Box 5607, SE-114 28 Stockholm, Sweden; KTH Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, SE-100 44 Stockholm, Sweden
| | - Per M Claesson
- RISE - Research Institute of Sweden, Bioscience and Materials - Surface, Process and Formulation Box 5607, SE-114 28 Stockholm, Sweden; KTH Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, SE-100 44 Stockholm, Sweden
| | | | - Patrick A C Gane
- Omya International AG, Baslerstrasse 42, CH-4665 Oftringen, Switzerland; Aalto University, School of Chemical Engineering, Department of Bioproducts and Biosystems, P.O. Box 16300, FI-00076 Aalto, Helsinki, Finland
| | - Erik Bergendal
- KTH Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, SE-100 44 Stockholm, Sweden
| | - Andrea Tummino
- Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble, France; Eötvös Loránd University, Budapest 112, P.O. Box 32, H-1518, Hungary
| | | | - C Magnus Johnson
- KTH Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, SE-100 44 Stockholm, Sweden.
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Qi N, Sun H, Zhao H, Li Y. Achieving foaming control smartly: pre-solubilized flavor oil serves as an in situ homogeneous defoamer. SOFT MATTER 2018; 14:2059-2067. [PMID: 29480304 DOI: 10.1039/c7sm02266b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the wide application of aqueous foam, creating abundant foam and processing appropriate foaming control are both essential, depending upon the actual situation; the latter process is not only harder to achieve, but also more complicated to comprehensively understand on the molecular level. In this paper, a type of natural flavor oil, carvone, was solubilized in a micelle solution of sodium dodecyl sulfate (SDS) to study the effect on the foaming properties. The foamability and foam stability of the swollen micelle solutions were experimentally characterized, and the molecular behavior of the surfactant and oil molecules before, during and after the foaming process were investigated. It was found that the solubilized carvone co-adsorbed with SDS at the gas/water interface and caused a prominent effect on the foam film stability in several approaches, thereby making the flavor oil a possible foam controller that would not inhibit foam formation, but could eliminate foam efficiently once foam was undesired. Interestingly, it was found that the release of flavor in the foaming process was promoted. Detailed discussion of the interfacial behavior of carvone and the effect on the foaming properties of surfactants in different stages of foam may provide a theoretical foundation for exploring green and smart approaches in achieving foaming control.
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Affiliation(s)
- Na Qi
- Key Laboratory of Colloid and Interface Chemistry of State Education Ministry, Shandong University, 27 South Road of ShanDa, Jinan, Shandong 250100, P. R. China.
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Zielińska K, Sun H, Campbell RA, Zarbakhsh A, Resmini M. Smart nanogels at the air/water interface: structural studies by neutron reflectivity. NANOSCALE 2016; 8:4951-4960. [PMID: 26697736 DOI: 10.1039/c5nr07538f] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The development of effective transdermal drug delivery systems based on nanosized polymers requires a better understanding of the behaviour of such nanomaterials at interfaces. N-Isopropylacrylamide-based nanogels synthesized with different percentages of N,N'-methylenebisacrylamide as cross-linker, ranging from 10 to 30%, were characterized at physiological temperature at the air/water interface, using neutron reflectivity (NR), with isotopic contrast variation, and surface tension measurements; this allowed us to resolve the adsorbed amount and the volume fraction of nanogels at the interface. A large conformational change for the nanogels results in strong deformations at the interface. As the percentage of cross-linker incorporated in the nanogels becomes higher, more rigid matrices are obtained, although less deformed, and the amount of adsorbed nanogels is increased. The data provide the first experimental evidence of structural changes of nanogels as a function of the degree of cross-linking at the air/water interface.
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Affiliation(s)
- Katarzyna Zielińska
- Department of Chemistry, SBCS, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
| | - Huihui Sun
- Department of Chemistry, SBCS, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
| | - Richard A Campbell
- Institut Laue-Langevin, 71 avenue des Martyrs - CS 20156, 38042 Grenoble Cedex 9, France
| | - Ali Zarbakhsh
- Department of Chemistry, SBCS, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
| | - Marina Resmini
- Department of Chemistry, SBCS, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
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Arteta MY, Berti D, Montis C, Campbell RA, Eriksson C, Clifton LA, Skoda MWA, Soltwedel O, Koutsioubas A, Baglioni P, Nylander T. On the formation of dendrimer/nucleolipids surface films for directed self-assembly. SOFT MATTER 2015; 11:1973-1990. [PMID: 25626114 DOI: 10.1039/c4sm02712d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We describe the formation and structure of nucleolipid/dendrimer multilayer films controlled by non-covalent interactions to obtain biomaterials that exhibit molecular recognition of nucleic acids. Layers of cationic poly(amidoamine) (PAMAM) dendrimers of generation 4 and the anionic nucleolipids 1,2-dilauroyl-sn-glycero-3-phosphatidylnucleosides (DLPNs) based on uridine (DLPU) and adenosine (DLPA) were first formed at the silica-water interface. The PAMAM/DLPN layers were then exposed to short oligonucleotides, polynucleotides and single stranded DNA (ssDNA). The interfacial properties were characterized using quartz crystal microbalance with dissipation monitoring, attenuated total reflection Fourier transform infrared spectroscopy and neutron reflectometry. Both types of DLPN were found to adsorb as aggregates to preadsorbed PAMAM monolayers with a similar interfacial structure and composition before rinsing with pure aqueous solution. Nucleic acids were found to interact with PAMAM/DLPA layers due to base pairing interactions, while the PAMAM/DLPU layers did not have the same capability. This was attributed to the structure of the DLPA layer, which is formed by aggregates that extend from the interface towards the bulk after rinsing with pure solvent, while the DLPU layer forms compact structures. In complementary experiments using a different protocol, premixed PAMAM/DLPN samples adsorbed to hydrophilic silica only when the mixtures contained positively charged aggregates, which is rationalized in terms of electrostatic forces. The PAMAM/DLPA layers formed from the adsorption of these mixtures also bind ssDNA although in this case the adsorption is mediated by the opposite charges of the film and the nucleic acid rather than specific base pairing. The observed molecular recognition of nucleic acids by dendrimers functionalized via non-covalent interactions with nucleolipids is discussed in terms of biomedical applications such as gene vectors and biosensors.
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Affiliation(s)
- Marianna Yanez Arteta
- Physical Chemistry, Department of Chemistry, Lund University, P. O. Box 124, S-221 00 Lund, Sweden.
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9
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Li W, Jia X, Zhang B, Tian L, Li X, Zhang H, Zhang Q. Fabrication of PEI grafted Fe3O4/SiO2/P(GMA-co-EGDMA) nanoparticle anchored palladium nanocatalyst and its application in Sonogashira cross-coupling reactions. NEW J CHEM 2015. [DOI: 10.1039/c4nj02117g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Fe3O4/SiO2/P(GMA-co-EGDMA)–Pd(0) catalyst and its highly effective activity for Sonogashira cross-coupling reactions.
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Affiliation(s)
- Wei Li
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Xiangkun Jia
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Baoliang Zhang
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Lei Tian
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Xiangjie Li
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Hepeng Zhang
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Qiuyu Zhang
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
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Yanez Arteta M, Campbell RA, Watkins EB, Obiols-Rabasa M, Schillén K, Nylander T. Interactions of Small Dendrimers with Sodium Dodecyl Sulfate at the Air–Water Interface. J Phys Chem B 2014; 118:11835-48. [DOI: 10.1021/jp507230m] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Marianna Yanez Arteta
- Division
of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Richard A. Campbell
- Institut Laue-Langevin, 71 avenue
des Martyrs - CS 20156, 38042 Grenoble Cedex 9, France
| | - Erik B. Watkins
- Lujan
Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Marc Obiols-Rabasa
- Division
of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Karin Schillén
- Division
of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Tommy Nylander
- Division
of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
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Campbell RA, Yanez Arteta M, Angus-Smyth A, Nylander T, Noskov BA, Varga I. Direct impact of nonequilibrium aggregates on the structure and morphology of Pdadmac/SDS layers at the air/water interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:8664-8674. [PMID: 24988363 DOI: 10.1021/la500621t] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We discuss different nonequilibrium mechanisms by which bulk aggregates directly modify, and can even control, the interfacial structure and morphology of an oppositely charged polyelectrolyte/surfactant (P/S) mixture. Samples are categorized at the air/water interface with respect to the dynamic changes in the bulk phase behavior, the bulk composition, and the sample history using complementary surface-sensitive techniques. First, we show that bulk aggregates can spontaneously interact with the adsorption layer and are retained in it and that this process occurs most readily for positively charged aggregates with an expanded structure. In this case, key nonequilibrium issues of aggregate dissociation and spreading of surface-active material at the interface have a marked influence on the macroscopic interfacial properties. In a second distinct mechanism, aggregates inherently become trapped at the interface during its creation and lateral flocculation occurs. This irreversible process is most pronounced for aggregates with the lowest charge. A third mechanism involves the deposition of aggregates at interfaces due to their transport under gravity. The specificity of this process at an interface depends on its location and is mediated by density effects in the bulk. The prevalence of each mechanism critically depends on a number of different factors, which are outlined systematically here for the first time. This study highlights the sheer complexity by which aggregates can directly impact the interfacial properties of a P/S mixture. Our findings offer scope for understanding seemingly mysterious irreproducible effects which can compromise the performance of formulations in wide-ranging applications from foams to emulsions and lubricants.
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Affiliation(s)
- Richard A Campbell
- Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble Cedex 9, France
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