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Synthesis And Stability Of Water-in-Oil Emulsion Using Partially Reduced Graphene Oxide As A Tailored Surfactant.

Tanesh D. Gamot, A. Bhattacharyya, T. Sridhar, Fiona Beach, R. F. Tabor, M. Majumder
Published 2017 · Materials Science, Medicine

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Graphene oxide (GO) is widely known as an amphiphile having hydrophilic oxygen functionality and unoxidized graphitic patches as the hydrophobic domains. Exploiting this amphiphilicity, GO serves as a surfactant to stabilize oil-water interfaces. While there are numerous reports on GO as a surfactant, most of these reports concern oil-in-water (O/W) emulsions, and there are very few on the formation of water-in-oil (W/O) emulsions. We prepared W/O emulsions using partially reduced graphene oxide (prGO) as a surfactant. The partial reduction introduces a subtle hydrophilic-lipophilic balance (HLB), which favors the formation of the W/O emulsion. The morphological features and rheological characteristics of the W/O emulsion with 75:25 water-to-oil ratio were investigated and analyzed in detail. The W/O emulsion was found to have polydispersity with wide range of droplet sizes varying between 2 to 500 μm. Using confocal microscopy, the role of parameters such as extent of reduction, continuous phase volume fraction and the concentration of GO on the stability, microstructure and variation of droplet size distribution of the W/O emulsion were carefully monitored. With prGO concentration as large as 0.05% (w/w), highly concentrated emulsion will form, and are stable up to 20 days from formation; destabilization occurred from sedimentation and subsequent coalescence as the partially reduced GO was limited by its dispersion ability in the oil-phase studied here. Understanding the mechanisms behind the transient stability will enable the development of novel emulsion compositions containing GO as a multifunctional additive.
This paper references
10.1021/JP500072A
Graphene Oxide-Stabilized Oil-in-Water Emulsions: pH-Controlled Dispersion and Flocculation
T. M. McCoy (2014)
10.1016/J.ICHEATMASSTRANSFER.2016.06.006
Effect of particle size and viscosity on thermal conductivity enhancement of graphene oxide nanofluid
M. Esfahani (2016)
10.1016/J.MATLET.2015.04.026
Graphene beads fabricated by an emulsion process for supercapacitor electrode materials
L. Zang (2015)
10.1021/nn1006368
Improved synthesis of graphene oxide.
D. Marcano (2010)
10.1021/am4020549
Macroporous graphene oxide-polymer composite prepared through pickering high internal phase emulsions.
Z. Zheng (2013)
10.1016/j.cis.2009.07.001
Rheology of emulsions.
S. Derkach (2009)
10.1088/0957-4484/22/5/055705
Temperature dependence of graphene oxide reduced by hydrazine hydrate.
Penggang Ren (2011)
10.1088/0957-4484/24/35/355704
Study of simultaneous reduction and nitrogen doping of graphene oxide Langmuir-Blodgett monolayer sheets by ammonia plasma treatment.
G. Singh (2013)
10.1038/srep02694
All Carbon-Based Photodetectors: An eminent integration of graphite quantum dots and two dimensional graphene
Shih-Hao Cheng (2013)
10.1016/j.jcis.2013.03.012
Graphene oxide nanoplatelet dispersions in concentrated NaCl and stabilization of oil/water emulsions.
K. Y. Yoon (2013)
10.1016/J.CARBON.2013.07.051
Studies on resistive switching characteristics of aluminum/graphene oxide/semiconductor nonvolatile memory cells
S. M. Jilani (2013)
10.1039/B927302F
Hollow graphene oxide spheres self-assembled by W/O emulsion
P. Guo (2010)
10.1038/nnano.2007.451
Processable aqueous dispersions of graphene nanosheets.
Dan Li (2008)
10.1038/nnano.2008.83
Large-area ultrathin films of reduced graphene oxide as a transparent and flexible electronic material.
G. Eda (2008)
10.1039/9781849736794-00179
Chapter 8:Dispersible Graphene Oxide–Polymer Nanocomposites
Gang Liu (2012)
10.1038/ncomms10891
Large-area graphene-based nanofiltration membranes by shear alignment of discotic nematic liquid crystals of graphene oxide
A. Akbari (2016)
10.1071/CH12129
Conducting Material-incorporated Electrorheological Fluids: Core-shell Structured Spheres
Y. Liu (2012)
10.1021/la500216n
Two-dimensional materials as emulsion stabilizers: interfacial thermodynamics and molecular barrier properties.
Megan A. Creighton (2014)
10.1021/ja102777p
Graphene oxide sheets at interfaces.
J. Kim (2010)
10.1021/JP909284G
Hydrazine and Thermal Reduction of Graphene Oxide: Reaction Mechanisms, Product Structures, and Reaction Design
Xingfa Gao (2010)
10.1021/LA049335A
Role of surfactant type and concentration for the mean drop size during emulsification in turbulent flow.
S. Tcholakova (2004)
10.1002/9783527626564
Emulsion Science and Technology
T. Tadros (2009)
10.1016/S1359-0294(99)00035-7
New fundamental concepts in emulsion rheology
T. Mason (1999)
10.1007/S003960050409
High- and low-molecular-weight lignosulfonates and Kraft lignins as oil/water-emulsion stabilizers studied by means of electrical conductivity
S. A. Gundersen (1999)
10.1021/ar300047s
Two dimensional soft material: new faces of graphene oxide.
J. Kim (2012)
10.1002/ANIE.200503131
Particle-stabilized emulsions: a bilayer or a bridging monolayer?
T. S. Horozov (2006)
10.1016/0021-9797(86)90111-6
Rheology of foams and highly concentrated emulsions: III. Static shear modulus
H. M. Princen (1986)
10.1016/j.jcis.2012.11.024
Preparation of graphene oxide coated polystyrene microspheres by Pickering emulsion polymerization.
Guannan Yin (2013)
10.1351/PAC-CON-10-10-25
Graphene oxide as surfactant sheets
L. Cote (2010)
10.1021/la303554z
Thin-film transistors with a graphene oxide nanocomposite channel.
S. M. Jilani (2012)
10.1021/la300597n
Interfacial rheology and structure of tiled graphene oxide sheets.
L. Imperiali (2012)
10.1002/adma.201001068
Graphene and graphene oxide: synthesis, properties, and applications.
Yanwu Zhu (2010)
10.1002/ELAN.200900571
Graphene Based Electrochemical Sensors and Biosensors: A Review
Yuyan Shao (2010)
10.1002/AIC.690421119
Effect of droplet size on the rheology of emulsions
R. Pal (1996)
10.1039/9781847551474
Modern Aspects of Emulsion Science
B. P. Binks (2007)
10.1021/am400582n
Factors that affect Pickering emulsions stabilized by graphene oxide.
Yongqiang He (2013)
10.1016/J.COLSURFA.2017.04.070
Development of microstructure and evolution of rheological characteristics of a highly concentrated emulsion during emulsification
B. K. Sharu (2017)
10.1021/la100886x
Biocompatible graphene oxide-based glucose biosensors.
Y. Liu (2010)
10.1134/S1061933X0702007X
Peculiarities of rheological properties and flow of highly concentrated emulsions: The role of concentration and droplet size
I. Masalova (2007)



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