901
|
Gandini A, Lacerda TM, Carvalho AJF, Trovatti E. Progress of Polymers from Renewable Resources: Furans, Vegetable Oils, and Polysaccharides. Chem Rev 2015; 116:1637-69. [DOI: 10.1021/acs.chemrev.5b00264] [Citation(s) in RCA: 522] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Alessandro Gandini
- São
Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São-carlense 400, CEP 13566-590, São Carlos, São Paulo, Brazil
- Department
of Materials Engineering, São Carlos School of Engineering, University of São Paulo, Avenida João Dagnone 1100, CEP 13563-120, São Carlos, São Paulo, Brazil
| | - Talita M. Lacerda
- São
Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São-carlense 400, CEP 13566-590, São Carlos, São Paulo, Brazil
- Department
of Materials Engineering, São Carlos School of Engineering, University of São Paulo, Avenida João Dagnone 1100, CEP 13563-120, São Carlos, São Paulo, Brazil
| | - Antonio J. F. Carvalho
- Department
of Materials Engineering, São Carlos School of Engineering, University of São Paulo, Avenida João Dagnone 1100, CEP 13563-120, São Carlos, São Paulo, Brazil
| | - Eliane Trovatti
- São
Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São-carlense 400, CEP 13566-590, São Carlos, São Paulo, Brazil
- Department
of Materials Engineering, São Carlos School of Engineering, University of São Paulo, Avenida João Dagnone 1100, CEP 13563-120, São Carlos, São Paulo, Brazil
| |
Collapse
|
902
|
Halloysite nanotubes as a stabilizer: fabrication of thermally expandable microcapsules via Pickering suspension polymerization. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3731-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
903
|
Affiliation(s)
- Ankit Kumar
- Department
of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Shigeng Li
- Manufacturing & Materials Technology Area, Toner Development & Manufacturing Group, Xerox Corporation, Webster, New York 14580, United States
| | - Chieh-Min Cheng
- Manufacturing & Materials Technology Area, Toner Development & Manufacturing Group, Xerox Corporation, Webster, New York 14580, United States
| | - Daeyeon Lee
- Department
of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
904
|
Leong JY, Tey BT, Tan CP, Chan ES. Nozzleless Fabrication of Oil-Core Biopolymeric Microcapsules by the Interfacial Gelation of Pickering Emulsion Templates. ACS APPLIED MATERIALS & INTERFACES 2015; 7:16169-16176. [PMID: 26148344 DOI: 10.1021/acsami.5b04486] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ionotropic gelation has been an attractive method for the fabrication of biopolymeric oil-core microcapsules due to its safe and mild processing conditions. However, the mandatory use of a nozzle system to form the microcapsules restricts the process scalability and the production of small microcapsules (<100 μm). We report, for the first time, a nozzleless and surfactant-free approach to fabricate oil-core biopolymeric microcapsules through ionotropic gelation at the interface of an O/W Pickering emulsion. This approach involves the self-assembly of calcium carbonate (CaCO3) nanoparticles at the interface of O/W emulsion droplets followed by the addition of a polyanionic biopolymer into the aqueous phase. Subsequently, CaCO3 nanoparticles are dissolved by pH reduction, thus liberating Ca(2+) ions to cross-link the surrounding polyanionic biopolymer to form a shell that encapsulates the oil droplet. We demonstrate the versatility of this method by fabricating microcapsules from different types of polyanionic biopolymers (i.e., alginate, pectin, and gellan gum) and water-immiscible liquid cores (i.e., palm olein, cyclohexane, dichloromethane, and toluene). In addition, small microcapsules with a mean size smaller than 100 μm can be produced by selecting the appropriate conventional emulsification methods available to prepare the Pickering emulsion. The simplicity and versatility of this method allows biopolymeric microcapsules to be fabricated with ease by ionotropic gelation for numerous applications.
Collapse
Affiliation(s)
| | | | - Chin-Ping Tan
- §Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor Malaysia
| | | |
Collapse
|
905
|
Kazemi Y, Ramezani Kakroodi A, Rodrigue D. Compatibilization efficiency in post-consumer recycled polyethylene/polypropylene blends: Effect of contamination. POLYM ENG SCI 2015. [DOI: 10.1002/pen.24125] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yasamin Kazemi
- Department of Chemical Engineering; Université Laval; Quebec City Canada G1V 0A6
| | | | - Denis Rodrigue
- Department of Chemical Engineering; Université Laval; Quebec City Canada G1V 0A6
| |
Collapse
|
906
|
Sabouni R, Gomaa HG. Preparation of Pickering emulsions stabilized by metal organic frameworks using oscillatory woven metal micro-screen. SOFT MATTER 2015; 11:4507-4516. [PMID: 25953152 DOI: 10.1039/c5sm00922g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Uniform Pickering emulsions stabilized by metal organic frameworks (MOFs) MIL-101 and ZIF-8 nanoparticles (NPs) were successfully prepared using an oscillatory woven metal microscreen (WMMS) emulsification system in the presence and the absence of surfactants. The effects of operating and system parameters including the frequency and amplitude of oscillation, the type of nano-particle and/or surfactant on the droplet size and coefficient of variance of the prepared emulsions are investigated. The results showed that both the hydrodynamics of the system and the hydrophobic/hydrophilic nature of the NP influenced the interfacial properties of the oil-water interface during droplet formation and after detachment, which in turn affected the final droplet size and distribution. Comparison between the measured and predicted droplet size using a simple torque balance (TB) model is discussed.
Collapse
Affiliation(s)
- R Sabouni
- Department of Chemical and Biochemical Engineering, Western University, Ontario, Canada N6A5B9.
| | | |
Collapse
|
907
|
Tang J, Quinlan PJ, Tam KC. Stimuli-responsive Pickering emulsions: recent advances and potential applications. SOFT MATTER 2015; 11:3512-29. [PMID: 25864383 DOI: 10.1039/c5sm00247h] [Citation(s) in RCA: 373] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Pickering emulsions possess many advantages over traditional surfactant stabilized emulsions. For example, Pickering emulsions impart better stability against coalescence and, in many cases, are biologically compatible and environmentally friendly. These characteristics open the door for their use in a variety of industries spanning petroleum, food, biomedicine, pharmaceuticals, and cosmetics. Depending on the application, rapid, but controlled stabilization and destabilization of an emulsion may be necessary. As a result, Pickering emulsions with stimuli-responsive properties have, in recent years, received a considerable amounts of attention. This paper provides a concise and comprehensive review of Pickering emulsion systems that possess the ability to respond to an array of external triggers, including pH, temperature, CO2 concentration, light intensity, ionic strength, and magnetic field. Potential applications for which stimuli-responsive Pickering emulsion systems would be of particular value, such as emulsion polymerization, enhanced oil recovery, catalyst recovery, and cosmetics, are discussed.
Collapse
Affiliation(s)
- Juntao Tang
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada.
| | | | | |
Collapse
|
908
|
Abstract
In order to develop safe and sustainable food and pharmaceutical emulsions, bacterial cellulose (BC) nanofibrils were prepared to stabilize maize oil/water Pickering emulsions. The influence of BC content and pH value on the emulsion stability was explored. Droplet diameters decreased with BC contents in emulsions. At pH 12, the emulsions were most stable among all tested pH values. The transformation of emulsion structure from liquid to gel-like at 8-15°C with BC content higher than 1.55 g/L is predominantly depended on the viscoelastic entangled BC network. These results can have meaningful inspiration of designing edible food and pharmaceutical emulsions.
Collapse
|
909
|
Xu J, Wang K, Li J, Zhou H, Xie X, Zhu J. ABC Triblock Copolymer Particles with Tunable Shape and Internal Structure through 3D Confined Assembly. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00335] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiangping Xu
- Key
Laboratory for Large-Format Battery Materials and System of the Ministry
of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
- State
Key Laboratory of Materials Processing and Mold Technology, School
of Materials Science and Engineering, HUST, Wuhan 430074, China
| | - Ke Wang
- Key
Laboratory for Large-Format Battery Materials and System of the Ministry
of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Jingyi Li
- Key
Laboratory for Large-Format Battery Materials and System of the Ministry
of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Huamin Zhou
- State
Key Laboratory of Materials Processing and Mold Technology, School
of Materials Science and Engineering, HUST, Wuhan 430074, China
| | - Xiaolin Xie
- Key
Laboratory for Large-Format Battery Materials and System of the Ministry
of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Jintao Zhu
- Key
Laboratory for Large-Format Battery Materials and System of the Ministry
of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| |
Collapse
|
910
|
Berton-Carabin CC, Schroën K. Pickering Emulsions for Food Applications: Background, Trends, and Challenges. Annu Rev Food Sci Technol 2015; 6:263-97. [DOI: 10.1146/annurev-food-081114-110822] [Citation(s) in RCA: 383] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Karin Schroën
- Food Process Engineering Group, Wageningen University, Wageningen 6700 AA, The Netherlands;
| |
Collapse
|
911
|
Beverage emulsions: Comparison among nanoparticle stabilized emulsion with starch and surfactant stabilized emulsions. Food Res Int 2015. [DOI: 10.1016/j.foodres.2014.12.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
912
|
Fang Z, Yang D, Gao Y, Li H. pH-responsible Pickering emulsion and its catalytic application for reaction at water–oil interface. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3533-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
913
|
Molecularly imprinted polymer microspheres prepared by Pickering emulsion polymerization for selective solid-phase extraction of eight bisphenols from human urine samples. Anal Chim Acta 2015; 872:35-45. [PMID: 25892067 DOI: 10.1016/j.aca.2015.02.058] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 02/16/2015] [Accepted: 02/21/2015] [Indexed: 12/29/2022]
Abstract
The bisphenol A (BPA) imprinted polymer microspheres were prepared by simple Pickering emulsion polymerization. Compared to traditional bulk polymerization, both high yields of polymer and good control of particle sizes were achieved. The characterization results of scanning electron microscopy and nitrogen adsorption-desorption measurements showed that the obtained molecularly imprinted polymer microsphere (MIPMS) particles possessed regular spherical shape, narrow diameter distribution (30-60 μm), a specific surface area (S(BET)) of 281.26 m(2) g(-1) and a total pore volume (V(t)) of 0.459 cm(3) g(-1). Good specific adsorption capacity for BPA was obtained in the sorption experiment and good class selectivity for BPA and its seven structural analogs (bisphenol F, bisphenol B, bisphenol E, bisphenol AF, bisphenol S, bisphenol AP and bisphenol Z) was demonstrated by the chromatographic evaluation experiment. The MIPMS as solid-phase extraction (SPE) packing material was then evaluated for extraction and clean-up of these bisphenols (BPs) from human urine samples. An accurate and sensitive analytical method based on the MIPMS-SPE coupled with HPLC-DAD has been successfully established for simultaneous determination of eight BPs from human urine samples with detection limits of 1.2-2.2 ng mL(-1). The recoveries of BPs for urine samples at two spiking levels (100 and 500 ng mL(-1) for each BP) were in the range of 81.3-106.7% with RSD values below 8.3%.
Collapse
|
914
|
Monégier du Sorbier Q, Aimable A, Pagnoux C. Influence of the electrostatic interactions in a Pickering emulsion polymerization for the synthesis of silica-polystyrene hybrid nanoparticles. J Colloid Interface Sci 2015; 448:306-14. [PMID: 25746183 DOI: 10.1016/j.jcis.2015.02.017] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 02/06/2015] [Accepted: 02/06/2015] [Indexed: 11/30/2022]
Abstract
HYPOTHESIS Silica-polystyrene hybrid nanoparticles were synthesized by Pickering emulsion polymerization. The coupling effect of initiator type and silica surface charge was studied to exhibit the predominant role of electrostatic interactions in the synthesis mechanisms. EXPERIMENTS Non-ionic hydrophobic initiator (2,2'-azobis(2-methylpropionitrile), AIBN) or anionic hydrophilic initiator (sodium persulfate, NaPS), and positively or negatively charged silica were used as reactants with styrene for Pickering emulsion polymerization. Their interactions were evaluated by Zeta potential measurements. The droplet size and the stability of the Pickering emulsions, and the hybrid particle morphology, surface coverage, size and agglomeration were evaluated by laser granulometry and microscopy. FINDINGS Similar surface charge between negatively charged silica particles and an anionic initiator led to strong repulsions and thus to non-covered polystyrene nanoparticles. With positively charged silica, a high decoration was obtained due to attractive interactions between the inorganic and the organic phases, but a strong agglomeration was also observed. The use of a non-ionic initiator led to a homogeneous coverage with negatively charged silica. With positively charged silica micronic sizes were formed by following two different mechanisms. These data, by enriching the existing literature, led to a more complete and robust description of the emulsion polymerization synthesis for hybrid nanostructures.
Collapse
Affiliation(s)
- Q Monégier du Sorbier
- Laboratoire Science des Procédés Céramiques et de Traitements de Surface (SPCTS), UMR CNRS 7315, ENSCI, Centre Européen de la Céramique, 12 rue Atlantis, 87068 Limoges Cedex, France
| | - A Aimable
- Laboratoire Science des Procédés Céramiques et de Traitements de Surface (SPCTS), UMR CNRS 7315, ENSCI, Centre Européen de la Céramique, 12 rue Atlantis, 87068 Limoges Cedex, France.
| | - C Pagnoux
- Laboratoire Science des Procédés Céramiques et de Traitements de Surface (SPCTS), UMR CNRS 7315, ENSCI, Centre Européen de la Céramique, 12 rue Atlantis, 87068 Limoges Cedex, France
| |
Collapse
|
915
|
Liu J, Yin D, Zhang S, Liu H, Zhang Q. Synthesis of polymeric core/shell microspheres with spherical virus-like surface morphology by Pickering emulsion. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.11.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
916
|
Hermoso J, Martinez-Boza F, Gallegos C. Influence of aqueous phase volume fraction, organoclay concentration and pressure on invert-emulsion oil muds rheology. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.07.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
917
|
Thermal stability of oil-in-water Pickering emulsion in the presence of nanoparticle, surfactant, and polymer. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.07.026] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
918
|
Structuring Food Emulsions to Improve Nutrient Delivery During Digestion. FOOD ENGINEERING REVIEWS 2015. [DOI: 10.1007/s12393-015-9108-0] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
919
|
Wu J, Shi M, Li W, Zhao L, Wang Z, Yan X, Norde W, Li Y. Pickering emulsions stabilized by whey protein nanoparticles prepared by thermal cross-linking. Colloids Surf B Biointerfaces 2015; 127:96-104. [PMID: 25660092 DOI: 10.1016/j.colsurfb.2015.01.029] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Accepted: 01/19/2015] [Indexed: 10/24/2022]
Abstract
A Pickering (o/w) emulsion was formed and stabilized by whey protein isolate nanoparticles (WPI NPs). Those WPI NPs were prepared by thermal cross-linking of denatured WPI proteins within w/o emulsion droplets at 80°C for 15 min. During heating of w/o emulsions containing 10% (w/v) WPI proteins in the water phase, the emulsions displayed turbid-transparent-turbid phase transitions, which is ascribed to the change in the size of the protein-containing water droplets caused by thermal cross-linking between denatured protein molecules. The transparent stage indicated the formation of WPI NPs. WPI NPs of different sizes were obtained by varying the mixing speed. WPI NPs of 200-500 nm were selected to prepare o/w Pickering emulsions because of their good stability against coalescence. By Confocal Laser Scanning Microscopy, it was observed that WPI NPs were closely packed and distributed at the surface of the emulsion droplets. By measuring water contact angles of WPI NPs films, it was found that under most conditions WPI NPs present good partial wetting properties, but that at the isoelectric point (pI) and high ionic strength the particles become more hydrophobic, resulting in less stable Pickering emulsion. Thus, at pH above and below the pI of WPI NPs and low to moderate ionic strengths (1-10 mM), and with a WPI NPs concentration of 2% (w/v), a stable Pickering emulsion can be obtained. The results may provide useful information for applications of WPI NPs in environmentally friendly and food grade applications, notably in food, pharmaceutical and cosmetic products.
Collapse
Affiliation(s)
- Jiande Wu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, College of Life Science and Technology, P.O. Box 53, 100029 Beijing, China
| | - Mengxuan Shi
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, College of Life Science and Technology, P.O. Box 53, 100029 Beijing, China
| | - Wei Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, College of Life Science and Technology, P.O. Box 53, 100029 Beijing, China
| | - Luhai Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, College of Life Science and Technology, P.O. Box 53, 100029 Beijing, China
| | - Ze Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, College of Life Science and Technology, P.O. Box 53, 100029 Beijing, China
| | - Xinzhong Yan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, College of Life Science and Technology, P.O. Box 53, 100029 Beijing, China
| | - Willem Norde
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, College of Life Science and Technology, P.O. Box 53, 100029 Beijing, China; Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands
| | - Yuan Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, College of Life Science and Technology, P.O. Box 53, 100029 Beijing, China.
| |
Collapse
|
920
|
Huang J, Xu J, Chen K, Wang T, Cui C, Wei X, Zhang R, Li L, Guo X. Synthesis of Triblock Copolymers via RAFT Polymerization and Their Application as Surfactants for Crude Oil-in-Water Emulsion. Ind Eng Chem Res 2015. [DOI: 10.1021/ie504207r] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jing Huang
- State-Key
Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jun Xu
- State-Key
Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Kaimin Chen
- College
of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
| | - Tongshuai Wang
- State-Key
Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chao Cui
- State-Key
Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaoming Wei
- Petrochina Liaohe Oilfield Company, Panjin 124010, China
| | - Rui Zhang
- State-Key
Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Li Li
- State-Key
Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xuhong Guo
- State-Key
Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| |
Collapse
|
921
|
Snoeyink C, Barman S, Christopher GF. Contact angle distribution of particles at fluid interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:891-897. [PMID: 25548951 DOI: 10.1021/la5040195] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Recent measurements have implied a distribution of interfacially adsorbed particles' contact angles; however, it has been impossible to measure statistically significant numbers for these contact angles noninvasively in situ. Using a new microscopy method that allows nanometer-scale resolution of particle's 3D positions on an interface, we have measured the contact angles for thousands of latex particles at an oil/water interface. Furthermore, these measurements are dynamic, allowing the observation of the particle contact angle with high temporal resolution, resulting in hundreds of thousands of individual contact angle measurements. The contact angle has been found to fit a normal distribution with a standard deviation of 19.3°, which is much larger than previously recorded. Furthermore, the technique used allows the effect of measurement error, constrained interfacial diffusion, and particle property variation on the contact angle distribution to be individually evaluated. Because of the ability to measure the contact angle noninvasively, the results provide previously unobtainable, unique data on the dynamics and distribution of the adsorbed particles' contact angle.
Collapse
Affiliation(s)
- Craig Snoeyink
- Department of Mechanical Engineering, Texas Tech University , Lubbock, Texas 79409-1035, United States
| | | | | |
Collapse
|
922
|
Yang J, Han S, Zheng H, Dong H, Liu J. Preparation and application of micro/nanoparticles based on natural polysaccharides. Carbohydr Polym 2015; 123:53-66. [PMID: 25843834 DOI: 10.1016/j.carbpol.2015.01.029] [Citation(s) in RCA: 156] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Revised: 12/13/2014] [Accepted: 01/16/2015] [Indexed: 02/08/2023]
Abstract
Polysaccharides have attracted more and more attentions and been recognized to be the most promising materials in recent years because of their outstanding merits such as easily available, non-toxic, biocompatible, biodegradable, and easily modified. Considerable research efforts have been directed toward developing polysaccharides-based micro/nanoparticles (PM/NPs). The new major studies of PM/NPs over the past few years are outlined in this review. Methods of preparation, including self-assembly, ionic-gelation, complex coacervation, emulsification, and desolvation method and some others, are summarized. Different applications of PM/NPs in the field of drug-delivery system are highlighted. Besides, another novel application of PM/NPs that are used as emulsifiers to stabilize Pickering emulsion is also introduced. These environmental-friendly particle emulsifiers have received reasonable attention due to their novel applications, especially in food, cosmetics, and pharmaceutics. From literature surveys, we realized that studies on PM/NP systems for different applications have increased rapidly. Hence, the present review is timely.
Collapse
Affiliation(s)
- Jisheng Yang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
| | - Suya Han
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Haicheng Zheng
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Hongbiao Dong
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Jiubing Liu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| |
Collapse
|
923
|
Geisel K, Henzler K, Guttmann P, Richtering W. New insight into microgel-stabilized emulsions using transmission X-ray microscopy: nonuniform deformation and arrangement of microgels at liquid interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:83-89. [PMID: 25496214 DOI: 10.1021/la503959n] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Microgel-covered interfaces, e.g., in emulsions, have attracted much interest lately. Different imaging techniques have been used to image these interfaces, either flat or curved, to investigate their properties and appearance. Techniques such as cryogenic scanning electron microscopy (cryo-SEM) and confocal microscopy have provided valuable insight into microgel-covered systems but still have some disadvantages such as part of the microgels being trapped in vitrified liquid or the need for fluorescent markers. Some of these disadvantages can be overcome by using transmission X-ray microscopy (TXM), which has the advantage of allowing the investigation of adsorbed and free microgels simultaneously. We used TXM to acquire tomographic image series of microgel-covered droplets and calculated 3D reconstructions from these image stacks. As a result, we could show that microgels deform anisotropically and penetrate the oil droplets in the hydrated state. Additionally, 3D reconstruction gives an idea of the arrangement of microgels adsorbed to oil droplets and reveals that droplet stabilization is possible without full coverage of the interface with polymer segments.
Collapse
Affiliation(s)
- Karen Geisel
- Institute of Physical Chemistry, RWTH Aachen University , Aachen, Germany
| | | | | | | |
Collapse
|
924
|
Gong H, Li Y, Bao M, Lv D, Wang Z. Petroleum hydrocarbon degrading bacteria associated with chitosan as effective particle-stabilizers for oil emulsification. RSC Adv 2015. [DOI: 10.1039/c5ra01360g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bacteria act as an effective oil emulsifier with chitosan in sea water, together with its dramatically enhanced biodegradation.
Collapse
Affiliation(s)
- Haiyue Gong
- Key Laboratory of Marine Chemistry Theory and Technology
- Ministry of Education
- Ocean University of China
- Qingdao
- China
| | - Yiming Li
- Key Laboratory of Marine Chemistry Theory and Technology
- Ministry of Education
- Ocean University of China
- Qingdao
- China
| | - Mutai Bao
- Key Laboratory of Marine Chemistry Theory and Technology
- Ministry of Education
- Ocean University of China
- Qingdao
- China
| | - Dong Lv
- Key Laboratory of Marine Chemistry Theory and Technology
- Ministry of Education
- Ocean University of China
- Qingdao
- China
| | - Zhining Wang
- Key Laboratory of Marine Chemistry Theory and Technology
- Ministry of Education
- Ocean University of China
- Qingdao
- China
| |
Collapse
|
925
|
He L, Lin F, Li X, Sui H, Xu Z. Interfacial sciences in unconventional petroleum production: from fundamentals to applications. Chem Soc Rev 2015; 44:5446-94. [DOI: 10.1039/c5cs00102a] [Citation(s) in RCA: 203] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
With the ever increasing demand for energy to meet the needs of growth in population and improvement in the living standards, in particular in developing countries, the abundant unconventional oil reserves (about 70% of total world oil), such as heavy oil, oil/tar sands and shale oil, are playing an increasingly important role in securing global energy supply.
Collapse
Affiliation(s)
- Lin He
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Feng Lin
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Xingang Li
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- P. R. China
- National Engineering Research Centre of Distillation Technology
| | - Hong Sui
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- P. R. China
- National Engineering Research Centre of Distillation Technology
| | - Zhenghe Xu
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
- Institute of Nuclear and New Energy Technology
| |
Collapse
|
926
|
Li H, Yang D, Gao Y, Li H, Xu J. Dual responsive macroemulsion stabilized by Y-shaped amphiphilic AB2 miktoarm star copolymers. RSC Adv 2015. [DOI: 10.1039/c5ra16399d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Y-shaped amphiphilic PS–(PDMAEMA)2 miktoarm star copolymers stabilized o/w macroemulsion showed pH-induced demulsification and thermo-induced phase inversion.
Collapse
Affiliation(s)
- Heng Li
- College of Chemistry
- Xiangtan University
- Xiangtan
- China
| | | | - Yong Gao
- College of Chemistry
- Xiangtan University
- Xiangtan
- China
- Key Laboratory of Polymeric Materials & Application Technology of Hunan Province
| | - Huaming Li
- College of Chemistry
- Xiangtan University
- Xiangtan
- China
- Key Laboratory of Polymeric Materials & Application Technology of Hunan Province
| | - Jianxiong Xu
- College of Chemistry
- Xiangtan University
- Xiangtan
- China
- Hunan Key Laboratory of Green Packaging & Application of Biological Nanotechnology
| |
Collapse
|
927
|
Mangas-Sánchez J, Adlercreutz P. Highly efficient enzymatic biodiesel production promoted by particle-induced emulsification. BIOTECHNOLOGY FOR BIOFUELS 2015; 8:58. [PMID: 25873996 PMCID: PMC4396811 DOI: 10.1186/s13068-015-0247-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 03/26/2015] [Indexed: 05/06/2023]
Abstract
BACKGROUND At present, the conversion of oils to biodiesel is predominantly carried out using chemical catalysts. However, the corresponding lipase-catalysed process has important advantages, which include mild reaction conditions and the possibility of using cheap, low quality feedstocks with a high free fatty acid content. Further increases in the efficiency of the enzymatic process are desired to make it even more attractive and suitable for large-scale applications. RESULTS Herein, we present a simple and efficient two-phase lipase-catalysed system for the preparation of biodiesel in which different parameters (biocatalyst composition, ethanol concentration and the presence of additives) were optimised in order to obtain the maximum productivity starting from triolein with a high free oleic acid content. In the two-phase system, the enzyme tolerated high-ethanol concentrations, which made it possible to reach high conversions. The addition of silica particles increased the reaction rate substantially. It was suggested that such particles can catalyse acyl migration as a step to the full conversion to glycerol and biodiesel. However, in the system studied here, the effect of the particles was shown to be due to the formation of smaller and more uniform emulsion droplets leading to better mass transfer between the two phases. Particles of widely different size had positive effects, and the highest rate was obtained with silica particles derivatised with phenyl groups. The optimal conditions were applied to the solvent-free ethanolysis of rapeseed oil, and a yield of 96% was reached in 5 h. Under the mild conditions used, chemical catalysts were inefficient. CONCLUSIONS Triacylglycerol oils with a high free fatty acid content can be efficiently converted to ethyl esters using Thermomyces lanuginosus lipase as the catalyst in an aqueous/organic two-phase system. Fast mass transfer can be achieved using silica particles, which helped to decrease the size of the emulsion droplets and thus led to a more efficient process. The high-ethanol concentration tolerated by the lipase in this system made it possible to reach almost quantitative yields.
Collapse
Affiliation(s)
- Juan Mangas-Sánchez
- Department of Biotechnology, Lund University, P.O. Box 124, Lund, SE-221 00 Sweden
| | - Patrick Adlercreutz
- Department of Biotechnology, Lund University, P.O. Box 124, Lund, SE-221 00 Sweden
| |
Collapse
|
928
|
Winuprasith T, Suphantharika M. Properties and stability of oil-in-water emulsions stabilized by microfibrillated cellulose from mangosteen rind. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2014.07.027] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
929
|
Oil-in-water Pickering emulsions stabilized by phyllosilicates at high solid content. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.09.037] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
930
|
High-internal phase emulsions stabilized by colloidal Zr-based solid clusters. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.09.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
931
|
Powell KC, Chauhan A. Interfacial tension and surface elasticity of carbon black (CB) covered oil-water interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:12287-12296. [PMID: 25254486 DOI: 10.1021/la503049m] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Carboxyl-terminated carbon black (CB) particles have been proposed as readily available, biocompatible dispersants to stabilize oil-in-water emulsions after an oil spill. Since the reduction in interfacial tension and the increase in interfacial elasticity are the key parameters which relate interfacial mechanics to emulsion stability, this investigation explores the effect of CB adsorption and surface coverage on oil-water interfacial tension and elasticity. Flocculation of CB was explored as ionic strength was increased from 0 to 0.6 M, approximately the salinity of seawater. As salinity increases, CB aggregates into larger particles from 100 nm to 6 μm. The interfacial tension and dilational viscoelasticity were measured for two systems: a drop of a CB suspension in oil and an inverted oil drop in a CB suspension. For the arrangement of a CB suspension drop in oil, most of the CB settles and accumulates toward the bottom of the drop with only small surface adsorption and no appreciable effect is observed on the dynamic interfacial tension or the dilational viscoelasticity. On reversing the arrangement to an inverted oil drop in CB suspension and increasing the convection of the outer phase, the surface coverage increases considerably. The CB coverage becomes more uniform with higher convection with an average value of approximately 2.6 g/m(2), which is representative of the coverage in Pickering emulsions stabilized by CB particles. The CB coverage decreases the surface tension from about 30 to 8.5 mN/m accompanied by an increase in the surface elasticity to 20.7 mN/m. The sharp contrast between the results from the CB suspension drop and the oil drop could be partially due to the effect of the wetting characteristics of the particles or due to the significant differences between the convection in the two cases.
Collapse
Affiliation(s)
- Kristin Conrad Powell
- Department of Chemical Engineering, University of Florida , Gainesville, Florida 32611, United States
| | | |
Collapse
|
932
|
Yin D, Li B, Liu J, Zhang Q. Structural diversity of multi-hollow microspheres via multiple Pickering emulsion co-stabilized by surfactant. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3401-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
933
|
Santini E, Guzmán E, Ferrari M, Liggieri L. Emulsions stabilized by the interaction of silica nanoparticles and palmitic acid at the water–hexane interface. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.02.054] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
934
|
Nastasa V, Samaras K, Pascu M, Karapantsios T. Moderately stable emulsions produced by a double syringe method. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.01.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
935
|
Persson KH, Blute IA, Mira IC, Gustafsson J. Creation of well-defined particle stabilized oil-in-water nanoemulsions. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.06.034] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
936
|
Fang Z, Yang D, Gao Y, Li H. Massage ball-like, hollow porous Au/SiO2microspheres templated by a Pickering emulsion derived from polymer–metal hybrid emulsifier micelles. RSC Adv 2014. [DOI: 10.1039/c4ra09545f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
937
|
Nesterenko A, Drelich A, Lu H, Clausse D, Pezron I. Influence of a mixed particle/surfactant emulsifier system on water-in-oil emulsion stability. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.05.044] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
938
|
Rayner M, Marku D, Eriksson M, Sjöö M, Dejmek P, Wahlgren M. Biomass-based particles for the formulation of Pickering type emulsions in food and topical applications. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.03.053] [Citation(s) in RCA: 208] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
939
|
Lorentz R, Rahali Y, Issa S, Bensouda Y, Holtzinger G, Aoussat A, Pensé-Lhéritier AM. One-pot synthesis of sub-micron organosilicate particles for the formulation of Pickering emulsions. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.05.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
940
|
ASA-in-water emulsions stabilized by laponite nanoparticles modified with tetramethylammonium chloride. Chem Eng Sci 2014. [DOI: 10.1016/j.ces.2014.06.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
941
|
Tan H, Sun G, Lin W, Mu C, Ngai T. Gelatin particle-stabilized high internal phase emulsions as nutraceutical containers. ACS APPLIED MATERIALS & INTERFACES 2014; 6:13977-84. [PMID: 25102954 DOI: 10.1021/am503341j] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this paper, we report for the first time the use of a well-dispersed gelatin particle as a representative of natural and biocompatible materials to be an effective particle stabilizer for high internal phase emulsion (HIPE) formulation. Fairly monodispersed gelatin particles (∼200 nm) were synthesized through a two-step desolvation method and characterized by dynamic light scattering, ζ-potential measurements, scanning electron microscopy, and atomic force microscopy. Those protein latexes were then used as sole emulsifiers to fabricate stable oil-in-water Pickering HIPEs at different concentrations, pH conditions, and homogenization times. Most of the gelatin particles were irreversibly adsorbed at the oil-water interface to hinder droplet coalescence, such that Pickering HIPEs can be formed by a small amount of gelatin particles (as low as 0.5 wt % in the water phase) at pH far away from the isoelectric point of the gelatin particles. In addition, increasing homogenization time led to narrow size distribution of droplets, and high particle concentration resulted in more solidlike Pickering HIPEs. In vitro controlled-release experiments revealed that the release of the encapsulated β-carotene can be tuned by manipulating the concentration of gelatin particles in the formulation, suggesting that the stable and narrow-size-distributed gelatin-stabilized HIPEs had potential in functional food and pharmaceutical applications.
Collapse
Affiliation(s)
- Huan Tan
- Department of Pharmaceutical and Bioengineering, School of Chemical Engineering, Sichuan University , Chengdu 610065, P.R. China
| | | | | | | | | |
Collapse
|
942
|
Zhang W, Liu W, Li H, Hubbe MA, Yu D, Li G, Wang H. Improving Stability and Sizing Performance of Alkenylsuccinic Anhydride (ASA) Emulsion by Using Melamine-Modified Laponite Particles as Emulsion Stabilizer. Ind Eng Chem Res 2014. [DOI: 10.1021/ie501381a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei Zhang
- Shandong Provincial Key Laboratory of Fine Chemicals, Key Laboratory of Pulp & Paper Science and Technology (Qilu University of Technology), Ministry of Education, Jinan, Shandong 250353, China
| | - Wenxia Liu
- Shandong Provincial Key Laboratory of Fine Chemicals, Key Laboratory of Pulp & Paper Science and Technology (Qilu University of Technology), Ministry of Education, Jinan, Shandong 250353, China
| | - Haidong Li
- Shandong Provincial Key Laboratory of Fine Chemicals, Key Laboratory of Pulp & Paper Science and Technology (Qilu University of Technology), Ministry of Education, Jinan, Shandong 250353, China
| | - Martin A. Hubbe
- Department
of Forest Biomaterials, North Carolina State University, Raleigh, North Carolina 27695-8005, United States
| | - Dehai Yu
- Shandong Provincial Key Laboratory of Fine Chemicals, Key Laboratory of Pulp & Paper Science and Technology (Qilu University of Technology), Ministry of Education, Jinan, Shandong 250353, China
| | - Guodong Li
- Shandong Provincial Key Laboratory of Fine Chemicals, Key Laboratory of Pulp & Paper Science and Technology (Qilu University of Technology), Ministry of Education, Jinan, Shandong 250353, China
| | - Huili Wang
- Shandong Provincial Key Laboratory of Fine Chemicals, Key Laboratory of Pulp & Paper Science and Technology (Qilu University of Technology), Ministry of Education, Jinan, Shandong 250353, China
| |
Collapse
|
943
|
Tang J, Lee MFX, Zhang W, Zhao B, Berry RM, Tam KC. Dual Responsive Pickering Emulsion Stabilized by Poly[2-(dimethylamino)ethyl methacrylate] Grafted Cellulose Nanocrystals. Biomacromolecules 2014; 15:3052-60. [DOI: 10.1021/bm500663w] [Citation(s) in RCA: 238] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Juntao Tang
- Department
of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L
3G1, Canada
| | - Micky Fu Xiang Lee
- Chemical
Engineering Discipline, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 46150 Bandar Sunway, Selangor, Malaysia
| | - Wei Zhang
- Department
of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L
3G1, Canada
| | - Boxin Zhao
- Department
of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L
3G1, Canada
| | - Richard M. Berry
- CelluForce Inc., 625, Président-Kennedy
Avenue, Montreal, Quebec H3A 1K2, Canada
| | - Kam C. Tam
- Department
of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L
3G1, Canada
| |
Collapse
|
944
|
Haaj SB, Thielemans W, Magnin A, Boufi S. Starch nanocrystal stabilized Pickering emulsion polymerization for nanocomposites with improved performance. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8263-8273. [PMID: 24871664 DOI: 10.1021/am501077e] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Latex/starch nanocrystal (SNC) nanocomposite dispersions were successfully synthesized via a one-step surfactant-free Pickering emulsion polymerization route using SNC as the sole stabilizer. The effect of the SNC content, initiator type and comonomer on the particle size, colloidal stability, and film properties were investigated. Both HCl and H2SO4-hydrolysed starch nanocrystals, each bearing different surface charges, were used as Pickering emulsion stabilizing nanoparticles. SNCs from HCl hydrolysis were found to provide a better stabilization effect, giving rise to a polymer dispersion with a lower average particle size. The mechanistic aspects of the Pickering emulsion polymerization were also discussed. Nanocomposites formed by film-casting the polymer Pickering emulsions showed better mechanical properties and optical transparency than those obtained by blending the polymer emulsion with a nanocrystal dispersion, showing the one-pot route to nanocomposite precursors to be doubly advantageous. Therefore, this in situ polymerization technique not only facilitates the use of SNC nanoparticles, it also provides a valuable nanocomposite with enhanced mechanical properties and high transparency level.
Collapse
Affiliation(s)
- Sihem Bel Haaj
- Sfax Faculty of Science-LMSE, University of Sfax , BP 802, 3018 Sfax, Tunisia
| | | | | | | |
Collapse
|
945
|
Fernandes LS, Cellet TS, Souza EM, Sayer C, Rubira AF, Dariva C, Oliveira JA. Development of a system by atomization for the formation of polymeric particles in micro and sub-micro scales. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.03.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
946
|
Dong J, Li J, Zhou J. Interfacial and phase transfer behaviors of polymer brush grafted amphiphilic nanoparticles: a computer simulation study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5599-5608. [PMID: 24803407 DOI: 10.1021/la500592k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanoparticles' phase transfer behaviors at the oil-water interface have many respects in common with lipid bilayer crossing behavior and the Pickering emulsion formation. Hence, the interfacial behavior and phase transfer behavior are intuitive indicators for the application potential of nanoparticle materials, e.g., on the emulsion formation and biomedical applications. Polymer brush modification enables nanoparticles to behave differently in hydrophilic solvent, hydrophobic solvent, and their interface region. In the present work, phase transfer behaviors of triblock polymer brush modified gold nanoparticles are explored by using coarse-grained simulations. The nanoparticles grafted with hydrophobic/weak hydrophilic/hydrophobic triblock brushes are found to have the best phase transfer performance, and the enhanced flexibility and mobility of head blocks are found to be the most vital factors. The inherent mechanism of interfacial behavior and phase transfer process are investigated and explained as perturbation effect and traction effect. According to our results, middle blocks dominate the brush morphology and decide whether NPs can be transferred into another phase. However, the inner blocks show higher dominance for the phase transfer behavior of nanoparticles restricted in the interface region, while the outer ones shows higher dominance for the nanoparticles departing from the interface region. Otherwise, interesting flat-Janus morphologies are found. Special applications in two-phase interface including emulsion stabilization could be expected. This work could provide some guidance for the molecular design and applications of polymer-nanoparticle composite materials.
Collapse
Affiliation(s)
- Jiaqi Dong
- School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P.R. China
| | | | | |
Collapse
|
947
|
Xu F, Fang Z, Yang D, Gao Y, Li H, Chen D. Water in oil emulsion stabilized by tadpole-like single chain polymer nanoparticles and its application in biphase reaction. ACS APPLIED MATERIALS & INTERFACES 2014; 6:6717-6723. [PMID: 24707798 DOI: 10.1021/am500427e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study, tadpole-like single chain polymer nanoparticles (TSCPNs) were efficiently synthesized by intramolecularly cross-linking P4VP block of commercial block polymer of PMMA2250-b-P4VP286 in N,N-dimethylformamide using propargyl bromide as cross-linking agent. The intramolecular cross-linking reaction led to the production of TSCPNs with a linear tail and a cross-linked head. The as-prepared TSCPNs were then applied as emulsifier to stabilize water in chlorobenzene emulsion, and an extremely stabilized water in oil (W/O) emulsion was generated at a low TSCPNs concentration. The TSCPNs concentration was as low as 0.0075 wt % versus total weight of water and chlorobenzene for emulsion formation. The emulsifying performance of TSCPNs was better than that of low molecular surfactant, such as Span-80. The generated W/O emulsion provided an ideal medium for the reduction of oil-soluble p-nitroanisole by water-soluble sulfide to p-anisidine, an effective contact problem between the two reactants with different solubility was well solved through interfacial reaction.
Collapse
Affiliation(s)
- Fugui Xu
- College of Chemistry and ‡Key Lab of Environment Friendly Chemistry and Application in Ministry of Education, Xiangtan University , Xiangtan 411105, Hunan Province, P. R. China
| | | | | | | | | | | |
Collapse
|
948
|
Microbial advanced biofuels production: overcoming emulsification challenges for large-scale operation. Trends Biotechnol 2014; 32:221-9. [DOI: 10.1016/j.tibtech.2014.02.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 01/31/2014] [Accepted: 02/06/2014] [Indexed: 11/19/2022]
|
949
|
Jiang Y, Liu X, Chen Y, Zhou L, He Y, Ma L, Gao J. Pickering emulsion stabilized by lipase-containing periodic mesoporous organosilica particles: a robust biocatalyst system for biodiesel production. BIORESOURCE TECHNOLOGY 2014; 153:278-83. [PMID: 24368276 DOI: 10.1016/j.biortech.2013.12.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 11/30/2013] [Accepted: 12/02/2013] [Indexed: 05/15/2023]
Abstract
A novel catalytic system of Pickering emulsion stabilized by lipase-containing periodic mesoporous organosilica was constructed (named LP@PE) and used as biocatalyst for biodiesel production. The reaction parameters were optimized and the optimum conditions were as follows: the water fraction 0.65%, molar ratio of ethanol to oleic acid 2:1, immobilized lipase particles 150mg, phosphate buffer pH 7.0 and temperature 30°C. Under these conditions, the maximum biodiesel yield obtained via esterification of oleic acid with ethanol could reach 95.8%. The biodiesel yield could maintain 88.6% after LP@PE was used 15times. The LP@PE was also used in the synthesis of biodiesel from Jatropha curcas oil. The highest yield could reach 87.1% and the yield was 73.0% after 10 cycles. All these results demonstrated that Pickering emulsion system stabilized by immobilized enzyme may possess much potential in many enzymatic industrial applications.
Collapse
Affiliation(s)
- Yanjun Jiang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Xinlong Liu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Yafei Chen
- Institute of Biophysics, Hebei University of Technology, Tianjin 300401, China
| | - Liya Zhou
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Ying He
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Li Ma
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Jing Gao
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
| |
Collapse
|
950
|
Li X, Li H, Xiao Q, Wang L, Wang M, Lu X, York P, Shi S, Zhang J. Two-way effects of surfactants on Pickering emulsions stabilized by the self-assembled microcrystals of α-cyclodextrin and oil. Phys Chem Chem Phys 2014; 16:14059-69. [PMID: 24901107 DOI: 10.1039/c4cp00807c] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two way effects of Tween 80 and soybean lecithin (PL) on the stability of cyclodextrin (CD) Pickering emulsions.
Collapse
Affiliation(s)
- Xue Li
- Center for Drug Delivery System
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, China
- School of Pharmacy
| | - Haiyan Li
- Center for Drug Delivery System
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, China
| | - Qun Xiao
- Hainan Weikang Pharmaceutical Co. Ltd
- Anqing 246000, China
| | - Liuyi Wang
- Hainan Weikang Pharmaceutical Co. Ltd
- Anqing 246000, China
| | - Manli Wang
- Center for Drug Delivery System
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, China
| | - Xiaolong Lu
- Center for Drug Delivery System
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, China
| | - Peter York
- University of Bradford, Bradford
- West Yorkshire BD7 1DP, UK
| | - Senlin Shi
- School of Pharmacy
- Zhejiang Chinese Medical University
- Hangzhou 310000, China
| | - Jiwen Zhang
- Center for Drug Delivery System
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, China
| |
Collapse
|