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Lee KK, Low DYS, Foo ML, Yu LJ, Choong TSY, Tang SY, Tan KW. Molecular Dynamics Simulation of Nanocellulose-Stabilized Pickering Emulsions. Polymers (Basel) 2021; 13:polym13040668. [PMID: 33672331 PMCID: PMC7926420 DOI: 10.3390/polym13040668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/05/2021] [Accepted: 02/08/2021] [Indexed: 11/16/2022] Open
Abstract
While the economy is rapidly expanding in most emerging countries, issues coupled with a higher population has created foreseeable tension among food, water, and energy. It is crucial for more sustainable valorization of resources, for instance, nanocellulose, to address the core challenges in environmental sustainability. As the complexity of the system evolved, the timescale of project development has increased exponentially. However, research on the design and operation of integrated nanomaterials, along with energy supply, monitoring, and control infrastructure, has seriously lagged. The development cost of new materials can be significantly reduced by utilizing molecular simulation technology in the design of nanostructured materials. To realize its potential, nanocellulose, an amphiphilic biopolymer with the presence of rich -OH and -CH structural groups, was investigated via molecular dynamics simulation to reveal its full potential as Pickering emulsion stabilizer at the molecular level. This work has successfully quantified the Pickering stabilization mechanism profiles by nanocellulose, and the phenomenon could be visualized in three stages, namely the initial homogenous phase, rapid formation of micelles and coalescence, and lastly the thermodynamic equilibrium of the system. It was also observed that the high bead order was always coupled with a high volume of phase separation activities, through a coarse-grained model within 20,000 time steps. The outcome of this work would be helpful to provide an important perspective for the future design and development of nanocellulose-based emulsion products, which cater for food, cosmeceutical, and pharmaceutical industries.
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Affiliation(s)
- Ka Kit Lee
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang 43900, Selangor Darul Ehsan, Malaysia; (K.K.L.); (M.L.F.)
| | - Darren Yi Sern Low
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia;
| | - Mei Ling Foo
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang 43900, Selangor Darul Ehsan, Malaysia; (K.K.L.); (M.L.F.)
| | - Lih Jiun Yu
- Faculty of Engineering, Technology and Built Environment, Kuala Lumpur Campus (North Wing), UCSI University, Lot 12734, Jalan Choo Lip Kung, Taman Tayton View, Cheras 56000, Kuala Lumpur, Malaysia;
| | - Thomas Shean Yaw Choong
- Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, Seri Kembangan, Serdang 43400, Selangor, Malaysia;
| | - Siah Ying Tang
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia;
- Advanced Engineering Platform, School of Engineering, Monash University Malaysia, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
- Tropical Medicine and Biology Platform, School of Science, Monash University Malaysia, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
- Correspondence: (S.Y.T.); (K.W.T.); Tel.: +603-5514-4435 (S.Y.T.); +603-7610-2068 (K.W.T.)
| | - Khang Wei Tan
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang 43900, Selangor Darul Ehsan, Malaysia; (K.K.L.); (M.L.F.)
- Correspondence: (S.Y.T.); (K.W.T.); Tel.: +603-5514-4435 (S.Y.T.); +603-7610-2068 (K.W.T.)
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Bodratti AM, Sarkar B, Alexandridis P. Adsorption of poly(ethylene oxide)-containing amphiphilic polymers on solid-liquid interfaces: Fundamentals and applications. Adv Colloid Interface Sci 2017; 244:132-163. [PMID: 28069108 DOI: 10.1016/j.cis.2016.09.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 09/23/2016] [Accepted: 09/23/2016] [Indexed: 12/30/2022]
Abstract
The adsorption of amphiphilic molecules of varying size on solid-liquid interfaces modulates the properties of colloidal systems. Nonionic, poly(ethylene oxide) (PEO)-based amphiphilic molecules are particularly useful because of their graded hydrophobic-hydrophilic nature, which allows for adsorption on a wide array of solid surfaces. Their adsorption also results in other useful properties, such as responsiveness to external stimuli and solubilization of hydrophobic compounds. This review focuses on the adsorption properties of PEO-based amphiphiles, beginning with a discussion of fundamental concepts pertaining to the adsorption of macromolecules on solid-liquid interfaces, and more specifically the adsorption of PEO homopolymers. The main portion of the review highlights studies on factors affecting the adsorption and surface self-assembly of PEO-PPO-PEO block copolymers, where PPO is poly(propylene oxide). Block copolymers of this type are commercially available and of interest in several fields, due to their low toxicity and compatibility in aqueous systems. Examples of applications relevant to the interfacial behavior of PEO-PPO-PEO block copolymers are paints and coatings, detergents, filtration, and drug delivery. The methods discussed herein for manipulating the adsorption properties of PEO-PPO-PEO are emphasized for their ability to shed light on molecular interactions at interfaces. Knowledge of these interactions guides the formulation of novel materials with useful mesoscale organization and micro- and macrophase properties.
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Tardy BL, Yokota S, Ago M, Xiang W, Kondo T, Bordes R, Rojas OJ. Nanocellulose–surfactant interactions. Curr Opin Colloid Interface Sci 2017. [DOI: 10.1016/j.cocis.2017.02.004] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zhang B, Liu R, Zhang J, Liu B, He J. MesoDyn simulation study of phase behavior for dye–polyether derivatives in aqueous solutions. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.06.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Piekart J, Łuczak J. Transport properties of microemulsions with ionic liquid apolar domains as a function of ionic liquid content. RSC Adv 2016. [DOI: 10.1039/c6ra13061e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The conductivity, dynamic viscosity and diffusion coefficient of aqueous ionic liquid microemulsions were measured as a function of ionic liquid content. The conclusions from transport properties were supported by UV-Vis as well as FTIR measurements.
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Affiliation(s)
- Jakub Piekart
- Department of Chemical Technology
- Chemical Faculty
- Gdańsk University of Technology
- 80-233 Gdańsk
- Poland
| | - Justyna Łuczak
- Department of Chemical Technology
- Chemical Faculty
- Gdańsk University of Technology
- 80-233 Gdańsk
- Poland
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Vuoriluoto M, Orelma H, Johansson LS, Zhu B, Poutanen M, Walther A, Laine J, Rojas OJ. Effect of Molecular Architecture of PDMAEMA–POEGMA Random and Block Copolymers on Their Adsorption on Regenerated and Anionic Nanocelluloses and Evidence of Interfacial Water Expulsion. J Phys Chem B 2015; 119:15275-86. [DOI: 10.1021/acs.jpcb.5b07628] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Maija Vuoriluoto
- Biobased
Colloids and Materials group (BiCMat), Department of Forest Products
Technology, School of Chemical Technology, Aalto University, FI-00076, Espoo, Finland
| | - Hannes Orelma
- Biobased
Colloids and Materials group (BiCMat), Department of Forest Products
Technology, School of Chemical Technology, Aalto University, FI-00076, Espoo, Finland
- VTT, Technical Research Centre of Finland, Biologinkuja 7, P.O. Box 1000, FIN-02044 VTT, Finland
| | - Leena-Sisko Johansson
- Biobased
Colloids and Materials group (BiCMat), Department of Forest Products
Technology, School of Chemical Technology, Aalto University, FI-00076, Espoo, Finland
| | - Baolei Zhu
- DWI − Leibniz-Institute for Interactive Materials Research, Forckenbeckstr. 50, D-52056 Aachen, Germany
| | - Mikko Poutanen
- Department
of Applied Physics, School of Science, Aalto University, FI-00076, Espoo, Finland
| | - Andreas Walther
- DWI − Leibniz-Institute for Interactive Materials Research, Forckenbeckstr. 50, D-52056 Aachen, Germany
| | - Janne Laine
- Biobased
Colloids and Materials group (BiCMat), Department of Forest Products
Technology, School of Chemical Technology, Aalto University, FI-00076, Espoo, Finland
| | - Orlando J. Rojas
- Biobased
Colloids and Materials group (BiCMat), Department of Forest Products
Technology, School of Chemical Technology, Aalto University, FI-00076, Espoo, Finland
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Kříž J, Dybal J. Premicellar interaction of PEO-PPO-PEO triblock copolymers with partially hydrophobic alcohols: NMR study. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2013; 51:275-282. [PMID: 23456694 DOI: 10.1002/mrc.3942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 01/02/2013] [Accepted: 01/24/2013] [Indexed: 06/01/2023]
Abstract
The interactions of three alcohols, namely, 2-butanol (BuOH), 3-methyl-2-butanol (MeBuOH), and 3,3-dimethyl-2-butanol (Me2BuOH) with propylene oxide octamer (PO8) and the copolymers (EO)8(PO)13(EO)8(L35) and (EO)13(PO)30(EO)13(L64) in D2O were studied using (13)C NMR spectra and relaxations and (1)H PFG NMR diffusion measurements. For L64, it was shown that the temperature at which the PO chain starts to change its conformation under dehydration decreases by 6 K for each additional methyl group in the alcohol molecule (i.e. with increasing its hydrophobicity), and the analogous conformation states are attained at temperatures approximately 10 K lower compared using ketonic analogs of the alcohols under the same conditions. Also, the first signs of L64 aggregation, according to the normalized diffusion coefficients, are at temperatures 7, 10, and 13 K lower for BuOH, MeBuOH, and Me2BuOH, respectively. These effects are much weaker for (PO)13 in L35 or nonexistent for (PO)8 in PO8, thus showing the role of cooperativity in dehydration and aggregation processes. According to diffusion measurements, the molar fraction of the alcohol hydrogen bonded to L64 increases with its hydrophobicity and, in an apparent conflict with thermodynamics, with increasing temperature at which also higher NOE can be observed. Strong hydrogen bond interaction, which is in cooperation with hydrophobic interaction, does not preclude the exchange between bound and free states of the alcohol, however. Using (13)C transverse relaxation, its correlation time is shown to be of the order of 10 ms.
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Affiliation(s)
- Jaroslav Kříž
- Institute of Macromolecular Chemistry AS CR, v. v. i., Heyrovského Sq. 2, 162 06, Prague, Czech Republic
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