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Shi L, Peng J, Wu X, Zhu S, Gao Y. Stimuli-responsive antioxidant Pickering emulsions stabilized by functionalized cellulose nanocrystals. Int J Biol Macromol 2024; 275:133676. [PMID: 38971134 DOI: 10.1016/j.ijbiomac.2024.133676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 06/23/2024] [Accepted: 07/03/2024] [Indexed: 07/08/2024]
Abstract
Stimuli-responsive antioxidant Pickering emulsions play crucial role in many industrial areas. This study demonstrated for the first time oil-in-water Pickering emulsions with outstanding antioxidation and responsive demulsification stabilized by functionalized cellulose nanocrystals (CNCs). Dialdehyde cellulose nanocrystals (DACs) were first prepared through the oxidation of CNCs with periodate, followed by the grafting of p-aminophenols (PAPs) onto their surfaces through Schiff base reaction, affording PAP grafted DACs (DAC-g-PAP) via dynamic covalent linkage. The degree of the oxidation (DO) of DACs had a significant effect on the yield of the targeting DAC-g-PAP nanoparticles. High DO (≥40 %) potentially led to the degradation of DACs during the grafting of PAP. The introduced PAP endowed DACs with excellent radical scavenging capability, thereby providing antioxidant properties while improving the hydrophobicity. DAC-g-PAP nanoparticles were then applied as Pickering emulsifiers to prepare oil-in-water Pickering emulsions. The resultant Pickering emulsions indicated exceptional antioxidant and pH-responsiveness together with good freezing-thaw stability. The structures of DAC-g-PAP nanoparticles were thoroughly characterized in this study.
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Affiliation(s)
- Liangliang Shi
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, Jiangsu Collaborative Innovation Centre of Photovoltaic Science and Engineering, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Jiani Peng
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, Jiangsu Collaborative Innovation Centre of Photovoltaic Science and Engineering, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Xinyi Wu
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, Jiangsu Collaborative Innovation Centre of Photovoltaic Science and Engineering, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Siqi Zhu
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, Jiangsu Collaborative Innovation Centre of Photovoltaic Science and Engineering, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Yong Gao
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, Jiangsu Collaborative Innovation Centre of Photovoltaic Science and Engineering, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China.
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2
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Gogoi P, Manhot NK, Gautam G, Duary RK. Banana peel nanocellulose and soy protein hydrolysate complexed colloidal nanoparticles synthesis using ultrasonic interventions: characterization and stable pickering emulsion formation. Food Sci Biotechnol 2024; 33:1859-1869. [PMID: 38752126 PMCID: PMC11091028 DOI: 10.1007/s10068-023-01477-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/01/2023] [Accepted: 10/30/2023] [Indexed: 05/18/2024] Open
Abstract
Pickering based emulsion system are been gaining interest in active delivery of encapsulated molecules in food system. In the present study, cellulose nanoparticles (CNPs) were isolated from food waste (banana peel) using acid hydrolysis followed by high-intensity ultrasonication. The complex colloidal nanoparticles (CNPSPH) were fabricated using hydrogen bonding and electrostatic interactions between cellulose nanoparticles and soy protein hydrolysates. With 400 W power level for 30 min, size of 53.11 ± 1.45 nm with polydispersity index of 0.21 ± 0.21 and Zeta potential of - 34.33 ± 0.77 were noted for generated CNPs. The three-phase contact angle (o/w) of CNPSPH at a mass ratio of 1:1 CNPs to SPHs (CNPSPH 1:1) was approximately 89.07°, indicating as effective Pickering emulsifiers. Furthermore, the stability of the Pickering emulsion stabilised by CNPSPH complex was investigated under various pH and temperature conditions. The findings will provide solution in development of nanocellulose-soy protein complex particles for a stabilized Pickering emulsion formation. Supplementary Information The online version contains supplementary material available at 10.1007/s10068-023-01477-w.
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Affiliation(s)
- Parmita Gogoi
- Department of Food Engineering and Technology, Tezpur University, Tezpur, Assam 784028 India
| | - Nikhil Kumar Manhot
- Department of Food Technology, Rajiv Gandhi University, Rono-Hills, Doimukh, Arunachal Pradesh 781112 India
| | - Gitanjali Gautam
- Department of Food Engineering and Technology, Tezpur University, Tezpur, Assam 784028 India
| | - Raj Kumar Duary
- Department of Food Engineering and Technology, Tezpur University, Tezpur, Assam 784028 India
- Department of Dairy Science and Food Technology, Institute of Agricultural Sciences, Banaras Hindu University (BHU), Varanasi, U.P. 221005 India
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3
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Xu G, Onyianta AJ, Eloi JC, Harniman RL, Laverock J, Bond I, Diejomaoh OA, Koev TT, Khimyak YZ, Eichhorn SJ. Self-Healing Composite Coating Fabricated with a Cystamine Cross-Linked Cellulose Nanocrystal-Stabilized Pickering Emulsion. Biomacromolecules 2024; 25:715-728. [PMID: 38271957 PMCID: PMC10865351 DOI: 10.1021/acs.biomac.3c00915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 01/09/2024] [Accepted: 01/09/2024] [Indexed: 01/27/2024]
Abstract
A gelled Pickering emulsion system was fabricated by first stabilizing linseed oil droplets in water with dialdehyde cellulose nanocrystals (DACNCs) and then cross-linking with cystamine. Cross-linking of the DACNCs was shown to occur by a reaction between the amine groups on cystamine and the aldehyde groups on the CNCs, causing gelation of the nanocellulose suspension. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the cystamine-cross-linked CNCs (cysCNCs), demonstrating their presence. Transmission electron microscopy images evidenced that cross-linking between cysCNCs took place. This cross-linking was utilized in a linseed oil-in-water Pickering emulsion system, creating a novel gelled Pickering emulsion system. The rheological properties of both DACNC suspensions and nanocellulose-stabilized Pickering emulsions were monitored during the cross-linking reaction. Dynamic light scattering and confocal laser scanning microscopy (CLSM) of the Pickering emulsion before gelling imaged CNC-stabilized oil droplets along with isolated CNC rods and CNC clusters, which had not been adsorbed to the oil droplet surfaces. Atomic force microscopy imaging of the air-dried gelled Pickering emulsion also demonstrated the presence of free CNCs alongside the oil droplets and the cross-linked CNC network directly at the oil-water interface on the oil droplet surfaces. Finally, these gelled Pickering emulsions were mixed with poly(vinyl alcohol) solutions and fabricated into self-healing composite coating systems. These self-healing composite coatings were then scratched and viewed under both an optical microscope and a scanning electron microscope before and after self-healing. The linseed oil was demonstrated to leak into the scratches, healing the gap automatically and giving a practical approach for a variety of potential applications.
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Affiliation(s)
- Guofan Xu
- Bristol
Composites Institute, School of Civil, Aerospace and Design Engineering
(CADE), University of Bristol, University
Walk, Bristol BS8 1TR, U.K.
| | - Amaka J. Onyianta
- Bristol
Composites Institute, School of Civil, Aerospace and Design Engineering
(CADE), University of Bristol, University
Walk, Bristol BS8 1TR, U.K.
| | | | | | - Jude Laverock
- School
of Chemistry, University of Bristol, Bristol BS8 1TS, U.K.
| | - Ian Bond
- Bristol
Composites Institute, School of Civil, Aerospace and Design Engineering
(CADE), University of Bristol, University
Walk, Bristol BS8 1TR, U.K.
| | - Onajite Abafe Diejomaoh
- Bristol
Composites Institute, School of Civil, Aerospace and Design Engineering
(CADE), University of Bristol, University
Walk, Bristol BS8 1TR, U.K.
| | - Todor T. Koev
- School
of Pharmacy, University of East Anglia, Norwich Research Park NR4 7TJ, U.K.
| | - Yaroslav Z. Khimyak
- School
of Pharmacy, University of East Anglia, Norwich Research Park NR4 7TJ, U.K.
| | - Stephen J. Eichhorn
- Bristol
Composites Institute, School of Civil, Aerospace and Design Engineering
(CADE), University of Bristol, University
Walk, Bristol BS8 1TR, U.K.
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4
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Amanda P, Ismadi I, Ningrum RS, Nabila S, Prasetyo KW. Carrageenan functional film integrated with Pickering Emulsion of Oregano Oil Stabilized by Cationic Nanocellulose for Active Packaging. FOOD SCI TECHNOL INT 2024; 30:61-72. [PMID: 36259322 DOI: 10.1177/10820132221132912] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Consumers are worried about potential contaminants, especially during any pandemic event, and are demanding more biodegradable food packaging with little to no chemical preservatives. This study aims to prepare carrageenan film containing essential oil with antibacterial properties. Oregano essential oil is successfully added into the carrageenan-based film using the Pickering emulsion method with cationic nanocellulose as stabilizer. The positive charge of nanocellulose enhances the stability of emulsion through strong electrostatic interaction with the Oregano Oil. FTIR spectra and SEM micrographs show the Oregano Pickering emulsion (OrePE) well dispersed in the polymer matrix and good compatibility with carrageenan film. The mechanical and thermal properties of carrageenan film were only slightly affected by the addition of OrePE. The tensile strength of films significantly decreased, whereas the elongation break increased following the addition of OrePE. Moreover, the addition of OrePE to the carageen film provides inhibitory effects on gram-positive (S. aureus) and gram negative (E. coli) bacteria. This innovative incorporation of essential oil into biopolymer films by Pickering emulsion technology may have implications for extending the shelf life of food products which is indicates that the material has the potential to be used in active packaging.
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Affiliation(s)
- Putri Amanda
- Research Center for Biomass and Bioproduct, National Research and Innovation Agency, Cibinong Science Center, Cibinong, Indonesia
| | - Ismadi Ismadi
- Research Center for Biomass and Bioproduct, National Research and Innovation Agency, Cibinong Science Center, Cibinong, Indonesia
| | - Riska Surya Ningrum
- Research Center for Biomass and Bioproduct, National Research and Innovation Agency, Cibinong Science Center, Cibinong, Indonesia
| | - Syarifah Nabila
- Department of Agricultural Engineering, Faculty of Agricultural Technology, Brawijaya University, Malang, Indonesia
| | - Kurnia Wiji Prasetyo
- Research Center for Biomass and Bioproduct, National Research and Innovation Agency, Cibinong Science Center, Cibinong, Indonesia
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5
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Pei X, Song W. CO 2-Triggered Hierarchical-Pore UiO-66-Based Pickering Emulsions for Efficient and Recyclable Suzuki-Miyaura Cross-Coupling in Biphasic Systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:15046-15054. [PMID: 37812683 DOI: 10.1021/acs.langmuir.3c02011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
Hierarchical-pore metal-organic frameworks (H-MOFs) are considered to be emerging stabilizers for Pickering emulsion formation because of their hierarchically arranged pores, tailorable structures, and ultrahigh surface areas. However, stimulus-triggered Pickering emulsions built by H-MOFs have been seldom presented to date despite their great significance in diverse applications. Herein, by grafting Pd(OAc)2 on the hierarchical-pore zirconium MOF UiO-66, namely, H-UiO-66, with the aid of 1-alkyl-3-methylimidazolium 2-cyanopyrrolide salts ([CnMIM][2-CN-Pyr], n = 4, 6, and 8), a series of Pd(OAc)2-[CnMIM][2-CN-Pyr]@H-UiO-66 have been developed and utilized as emulsifiers for constructing CO2-switching Pickering emulsions. It was found that Pd(OAc)2-[CnMIM][2-CN-Pyr]@H-UiO-66 was able to stabilize the n-hexane-water mixture to form a Pickering emulsion even at an amount of 0.5 wt %. Upon alternate addition of CO2 and N2 at normal pressure, Pickering emulsions could be smartly converted between demulsification and re-emulsification. Through combining varieties of spectroscopic techniques, the mechanism of the switchable phase transformation lay in the acid-base reaction of ionic liquids with CO2 on H-UiO-66 and the creation of more hydrophilic salts, which reduced the wettability of the emulsifier and destabilized the emulsion. As an example of application, the stimulus-triggered Pickering emulsion was employed as a palladium-catalyzed Suzuki-Miyaura cross-coupling microreactor to achieve the combination of chemical reactions, isolation of products, and recovery of catalysts.
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Affiliation(s)
- Xiaoyan Pei
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, P. R. China
| | - Wangyue Song
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, P. R. China
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He R, Sun S, Cui J, Chi M, Wang Z, Hu S. pH/magnetic dual responsive Pickering emulsion stabilized by Fe 3O 4@SiO 2@chitosan nanoparticles. Phys Chem Chem Phys 2023; 25:25780-25788. [PMID: 37724345 DOI: 10.1039/d3cp03400c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Abstract
In recent years, Pickering emulsifiers have been widely used in various production fields due to their excellent structural stability, biocompatibility and environmental friendliness. For some applications, it is required that the emulsifier can quickly respond to environmental stimuli and control the transition between stable and unstable emulsions. In this paper, we report a novel composite Pickering emulsifier with Fe3O4 as the core and magnetic response recognition body, silica as the intermediate protective layer, and chitosan (CS) of different molecular weights to endow solid particles with surface activity and pH-responsive properties. This emulsifier can stabilize the emulsion in the emulsion system with deionized water as the aqueous phase and liquid paraffin as the oil phase and can control the demulsification of the formed emulsion under the dual pH/magnetic stimulation. The experimental results show that Fe3O4@SiO2@CS has good paramagnetism and pH responsiveness. The particle size of the composite emulsifier nanoparticles is between 90 nm and 120 nm, and the best stabilizing effect of the emulsion is achieved when the dosage is 0.5 wt%. In the pH range of 3-11, the emulsifier can rapidly demulsify a stable paraffin oil-water emulsion system under the action of a magnetic field of strength 0.4 T. The pH response of the emulsifier is as follows: when pH ≤ 2, the system can form a stable emulsion, which is composed of fully protonated chitosan as a free chain segment and Fe3O4@SiO2. Emulsion stabilization was achieved with monolithic Fe3O4@SiO2@CS as an emulsifier at pH > 2, and demulsification was achieved at pH ≈ pKb (CS) at 298 K. The research in this paper can provide a feasible idea and synthesis method for the preparation of organic-inorganic composite structure emulsifier.
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Affiliation(s)
- Runna He
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
| | - Shuangqing Sun
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao 266580, China
| | - Jianpeng Cui
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
| | - Mingshuo Chi
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
| | - Zhikun Wang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao 266580, China
| | - Songqing Hu
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao 266580, China
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7
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Agustin MB, Nematollahi N, Bhattarai M, Oliaei E, Lehtonen M, Rojas OJ, Mikkonen KS. Lignin nanoparticles as co-stabilizers and modifiers of nanocellulose-based Pickering emulsions and foams. CELLULOSE (LONDON, ENGLAND) 2023; 30:8955-8971. [PMID: 37736116 PMCID: PMC10509128 DOI: 10.1007/s10570-023-05399-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 07/12/2023] [Indexed: 09/23/2023]
Abstract
Nanocellulose is very hydrophilic, preventing interactions with the oil phase in Pickering emulsions. This limitation is herein addressed by incorporating lignin nanoparticles (LNPs) as co-stabilizers of nanocellulose-based Pickering emulsions. LNP addition decreases the oil droplet size and slows creaming at pH 5 and 8 and with increasing LNP content. Emulsification at pH 3 and LNP cationization lead to droplet flocculation and rapid creaming. LNP application for emulsification, prior or simultaneously with nanocellulose, favors stability given the improved interactions with the oil phase. The Pickering emulsions can be freeze-dried, enabling the recovery of a solid macroporous foam that can act as adsorbent for pharmaceutical pollutants. Overall, the properties of nanocellulose-based Pickering emulsions and foams can be tailored by LNP addition. This strategy offers a unique, green approach to stabilize biphasic systems using bio-based nanomaterials without tedious and costly modification procedures. Supplementary Information The online version contains supplementary material available at 10.1007/s10570-023-05399-y.
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Affiliation(s)
- Melissa B. Agustin
- Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, P.O. Box 66, FI-00014 Helsinki, Finland
- Present Address: VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, FI-02044 Espoo, Finland
| | - Neda Nematollahi
- Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, P.O. Box 66, FI-00014 Helsinki, Finland
| | - Mamata Bhattarai
- Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, P.O. Box 66, FI-00014 Helsinki, Finland
- Department of Bioproducts and Biosystems, Aalto University, P.O. Box 16300, 00076 Aalto, Finland
| | - Erfan Oliaei
- Wallenberg Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Mari Lehtonen
- Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, P.O. Box 66, FI-00014 Helsinki, Finland
| | - Orlando J. Rojas
- Department of Bioproducts and Biosystems, Aalto University, P.O. Box 16300, 00076 Aalto, Finland
- Bioproducts Institute, Department of Chemical and Biological Engineering, Department of Chemistry and Department of Wood Science, University of British Columbia, 2360, East Mall, Vancouver, BC V6T 1Z3 Canada
| | - Kirsi S. Mikkonen
- Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, P.O. Box 66, FI-00014 Helsinki, Finland
- Helsinki Institute of Sustainability Science, University of Helsinki, P.O. Box 65, FI-00014 Helsinki, Finland
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8
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Chen A, Li X, Han W. Construction of spherical cellulose nanocrystals synergized with graphene oxide to stabilize Pickering emulsions. Int J Biol Macromol 2023; 242:124499. [PMID: 37080402 DOI: 10.1016/j.ijbiomac.2023.124499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 04/11/2023] [Accepted: 04/13/2023] [Indexed: 04/22/2023]
Abstract
In this study, we prepared spherical cellulose nanocrystals (S-CNCs) and stabilized n-hexadecane Pickering emulsions in conjunction with graphene oxide (GO), exploring the interaction between S-CNCs and GO in the emulsions. Both S-CNCs and GO are amphiphilic and synergistically stabilize Pickering emulsions by adhering to the surface of oil droplets and within the emulsion space through hydrogen bonding. GO's two-dimensional sheets assemble into a 3D network structure, further improving the stability of Pickering emulsions. Consequently, the stability of Pickering emulsions can be adjusted by altering the S-CNCs/GO ratio, modifying the spatial distribution relationship of stabilizers in the emulsions. At an S-CNCs concentration of 1 g/L and a GO concentration of 3 g/L, the Pickering emulsion demonstrated excellent stability and exhibited no delamination after 31 days of storage. Thus, the S-CNCs/GO combination serves as an effective Pickering emulsion stabilizer, utilizing the synergistic effect between the two components.
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Affiliation(s)
- Anxiang Chen
- Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Xia Li
- Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
| | - Wenjia Han
- Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
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Smart antimicrobial Pickering emulsion stabilized by pH-responsive cellulose-based nanoparticles. Int J Biol Macromol 2023; 233:123516. [PMID: 36754260 DOI: 10.1016/j.ijbiomac.2023.123516] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/25/2023] [Accepted: 01/29/2023] [Indexed: 02/10/2023]
Abstract
Responsive antimicrobial materials can control and slow the release of antimicrobial agents smartly by responding to the stimulation of environmental conditions. In this study, we designed the pH-responsive cellulose-based nanoparticles (TOCNC-g-PEI) with amino and carboxyl groups by grafting polyethyleneimine (PEI) to carboxylated cellulose nanocrystals. Finally, the Pickering emulsion was endowed with smart antimicrobial properties by emulsifying the oregano essential oil (OEO) with nanoparticles. The TOCNC-g-PEI25000 had uniform size, greater dispersion, and excellent antimicrobial properties. The contact angles of nanoparticles were 78.70 ± 1.13°, 55.80 ± 1.58° and 55.35 ± 1.56° at neutral conditions, pH 4.0 and 8.0, respectively. The nanoparticles were responding to pH stimulation. The developed emulsion (4:6, 1.30 wt%) had exceptionally stabilized and encapsulated 98.56 ± 1.22 % of the oil phase. The OEO released rapidly within 0-12 h and slowly at 12-36 h. The cumulative release rates quickly reached 93.60 ± 3.73 % (pH 4.0) and 83.25 ± 0.36 % (pH 8.0) and stabilized gradually. The antimicrobial rates of emulsion stimulated for 4 h reached 100 % at pH 4.0, and both of them exceeded 96.10 ± 2.49 % at pH 8.0. The response of Pickering emulsion to pH stimulating controlled release antimicrobial agents and achieved smart antimicrobial.
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Zhang F, Shen R, Li N, Yang X, Lin D. Nanocellulose: An amazing nanomaterial with diverse applications in food science. Carbohydr Polym 2023; 304:120497. [PMID: 36641166 DOI: 10.1016/j.carbpol.2022.120497] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 11/16/2022] [Accepted: 12/20/2022] [Indexed: 12/27/2022]
Abstract
Recently, nanocellulose has gained growing interests in food science due to its many advantages including its broad resource of raw materials, renewability, interface stability, high surface area, mechanical strength, prebiotic characteristics, surface chemistry versatility and easy modification. Since then, this review summarized the sources, morphology, and structure characteristics of nanocellulose. Meanwhile, the mechanical, chemical, and combined treatment methods for the preparation of nanocellulose with desired properties were elaborated. Furthermore, the application of nanocellulose in Pickering emulsions, reinforced food packaging, functional food ingredient, food-grade hydrogels, and biosensors were emphasized. Finally, the safety, challenges, and future perspectives of nanocellulose were discussed. This work provided key developments and effective benefits of nanocellulose for future research opportunities in food.
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Affiliation(s)
- Fengrui Zhang
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Rui Shen
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Nan Li
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Xingbin Yang
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Dehui Lin
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China.
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11
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Milchev A, Petkov P. Concave polymer brushes inwardly grafted in spherical cavities. J Chem Phys 2023; 158:094903. [PMID: 36889952 DOI: 10.1063/5.0141450] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
The structure and scaling properties of inwardly curved polymer brushes, tethered under good solvent conditions to the inner surface of spherical shells such as membranes and vesicles, are studied by extensive molecular dynamics simulations and compared with earlier scaling and self-consistent field theory predictions for different molecular weights of the polymer chains N and grafting densities σg in the case of strong surface curvature, R-1. We examine the variation of the critical radius R*(σg), separating the regimes of weak concave brushes and compressed brushes, predicted earlier by Manghi et al. [Eur. Phys. J. E 5, 519-530 (2001)], as well as various structural properties such as the radial monomer- and chain-end density profiles, orientation of bonds, and brush thickness. The impact of chain stiffness, κ, on concave brush conformations is briefly considered as well. Eventually, we present the radial profiles of the local pressure normal, PN, and tangential, PT, to the grafting surface, and the surface tension γ(σg), for soft and rigid brushes, and find a new scaling relationship PN(R)∝σg 4, independent of the degree of chain stiffness.
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Affiliation(s)
- Andrey Milchev
- Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Peicho Petkov
- Sofia University St. Kliment Ohridski, Faculty of Physics, Sofia, Bulgaria
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12
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Li C, Xie W, Zhang X, Liu J, Zhang M, Shao JH. Pickering emulsion stabilized by modified pea protein-chitosan composite particles as a new fat substitute improves the quality of pork sausages. Meat Sci 2023; 197:109086. [PMID: 36580792 DOI: 10.1016/j.meatsci.2022.109086] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 12/02/2022] [Accepted: 12/20/2022] [Indexed: 12/25/2022]
Abstract
Pickering emulsion is a potential substitute for animal fat due to high stability and solid-like properties. Therefore, the effect of replacing 25%-100% pork backfat with Pickering emulsion (75% corn oil volume fraction) stabilized by modified pea protein-chitosan composite particles on the quality of sausages was studied. All meat pastes exhibited a strong gel-like rheological character (G' > G"). The incorporation of Pickering emulsion in sausages enhanced the textural properties (hardness, springiness, chewiness, cohesiveness and resilience) and the uniformity and compactness of micromorphology, as well as suppressed the cooking loss and TBARS content. In particular, the sausages with a backfat substitution ratio of 100%, showing a similar overall sensory acceptability to the backfat sausage, revealed the best rheological properties, texture properties and micromorphology and the lowest cooking loss and fat oxidation (P < 0.05). The results showed that Pickering emulsion stabilized by modified pea protein-chitosan composite particles is a potential fat substitute for meat products with the desirable characteristics.
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Affiliation(s)
- Chunqiang Li
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China.
| | - Wenru Xie
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Xue Zhang
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Jun Liu
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Mingyun Zhang
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Jun-Hua Shao
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
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13
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Pei X, Liu J, Song W, Xu D, Wang Z, Xie Y. CO 2-Switchable Hierarchically Porous Zirconium-Based MOF-Stabilized Pickering Emulsions for Recyclable Efficient Interfacial Catalysis. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1675. [PMID: 36837307 PMCID: PMC9960431 DOI: 10.3390/ma16041675] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/08/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
Stimuli-responsive Pickering emulsions are recently being progressively utilized as advanced catalyzed systems for green and sustainable chemical conversion. Hierarchically porous metal-organic frameworks (H-MOFs) are regarded as promising candidates for the fabrication of Pickering emulsions because of the features of tunable porosity, high specific surface area and structure diversity. However, CO2-switchable Pickering emulsions formed by hierarchically porous zirconium-based MOFs have never been seen. In this work, a novel kind of the amine-functionalized hierarchically porous UiO-66-(OH)2 (H-UiO-66-(OH)2) has been developed using a post-synthetic modification of H-UiO-66-(OH)2 by (3-aminopropyl)trimethoxysilane (APTMS), 3-(2-aminoethylamino)propyltrimethoxysilane (AEAPTMS) and 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane (AEAEAPTMS), and employed as emulsifiers for the construction of Pickering emulsions. It was found that the functionalized H-UiO-66-(OH)2 could stabilize a mixture of toluene and water to give an emulsion even at 0.25 wt % content. Interestingly, the formed Pickering emulsions could be reversibly transformed between demulsification and re-emulsification with alternate addition or removal of CO2. Spectral investigation indicated that the mechanism of the switching is attributed to the reaction of CO2 with amino silane on the MOF and the generation of hydrophilic salts, leading to a reduction in MOF wettability. Based on this strategy, a highly efficient and controlled Knoevenagel condensation reaction has been gained by using the emulsion as a mini-reactor and the emulsifier as a catalyst, and the coupling of catalysis reaction, product isolation and MOF recyclability has become accessible for a sustainable chemical process.
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14
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Wang B, Zhao X, Duan C, Li J, Zeng J, Xu J, Gao W, Chen K. Novel carboxylated cellulose nanocrystals synthesized by co-oxidation of sodium periodate/Fenton as a green solid emulsifier for oil-in-water Pickering emulsion. J Colloid Interface Sci 2023; 630:604-617. [DOI: 10.1016/j.jcis.2022.09.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 09/27/2022] [Accepted: 09/30/2022] [Indexed: 11/11/2022]
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15
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Patel AS, Balasubramaniam SL, Nayak B, Camire ME. Lauric acid adsorbed cellulose nanocrystals reduced the in vitro gastrointestinal digestion of oil-water pickering emulsions. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2022.108120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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16
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Pickering emulsion stabilized by temperature-sensitive PS@PNIPA nanoparticles as microcontainers. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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17
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Ye S, Zhang W, Zhai Z, Song B, Shang S, Song Z. Fully bio-based CO2-responsive Pickering gel emulsions stabilized by cellulose nanocrystals combined with a rosin-based surfactant. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Facile formulation of sustainable and stable oil-in-dispersion emulsion: A release agent with high demoulding efficacy. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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19
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Huang X, Zhu Z, Luo Z, Zhao W, Wang Y, Shi Y, Su X. Reversible stability of colloids switched by CO 2 based on polyhexamethylene guanidine. SOFT MATTER 2022; 18:8046-8052. [PMID: 36227104 DOI: 10.1039/d2sm00811d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The stability of a colloid, including emulsion and polymer latex, can be destroyed irreversibly by the addition of salt. Using the CO2 stimulus, amines can be converted into organic ammonium salts reversibly, which can access the switching of colloids. Polyhexamethylene guanidine (PHMG), was chosen as a switchable amine. The conductivity of PHMG aqueous solution switched by adding and removing CO2. Surface tension measurements verified that, under CO2, the critical micelle concentration of sodium dodecyl benzene sulfonate (SDBS) decreased from 1.0 × 10-3 to 5.0 × 10-4 M with the addition of PHMG. The crude oil emulsion containing SDBS and PHMG was destroyed and restored reversibly by the treatment with CO2 and N2. The polystyrene latex also occurred an obvious stratification after sparging with CO2 and returned a homogeneous phase upon bubbling N2. This study is intended to pave the way for colloids which has reversible stability in response to CO2 stimulation.
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Affiliation(s)
- Xiaoling Huang
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
| | - Zhuoyan Zhu
- Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083, China
| | - Zheng Luo
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
| | - Weihang Zhao
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
| | - Yufeng Wang
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
| | - Yiwen Shi
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
| | - Xin Su
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
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20
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Guan D, Luan H, Shao H, Que T, Xu C, Liu L, Huang X, Su X. Bio‐based
mixed
CO
2
‐switchable surfactant for reducing viscosity of heavy oil. J SURFACTANTS DETERG 2022. [DOI: 10.1002/jsde.12632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dan Guan
- Research Institute of Exploration and Detection Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
- Xinjiang Laboratory of Petroleum Reserve in Conglomerate Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
| | - Huoxin Luan
- Research Institute of Exploration and Detection Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
- Xinjiang Laboratory of Petroleum Reserve in Conglomerate Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
| | - Hongzhi Shao
- Research Institute of Exploration and Detection Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
- Xinjiang Laboratory of Petroleum Reserve in Conglomerate Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
| | - Tingli Que
- Research Institute of Exploration and Detection Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
- Xinjiang Laboratory of Petroleum Reserve in Conglomerate Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
| | - Congjun Xu
- Research Institute of Exploration and Detection Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
- Xinjiang Laboratory of Petroleum Reserve in Conglomerate Xinjiang Oilfield Branch Company PetroChina Karamay Xinjiang China
| | - Lulu Liu
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
| | - Xiaoling Huang
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
| | - Xin Su
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
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21
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Wang H, Zhang M, Hu J, Du H, Xu T, Si C. Sustainable preparation of surface functionalized cellulose nanocrystals and their application for Pickering emulsions. Carbohydr Polym 2022; 297:120062. [DOI: 10.1016/j.carbpol.2022.120062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 08/18/2022] [Accepted: 08/28/2022] [Indexed: 12/14/2022]
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22
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Shen P, Tang Q, Chen X, Li Z. Nanocrystalline cellulose extracted from bast fibers: Preparation, characterization, and application. Carbohydr Polym 2022; 290:119462. [DOI: 10.1016/j.carbpol.2022.119462] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/31/2022] [Accepted: 04/02/2022] [Indexed: 11/26/2022]
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23
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Pal A, Pal R. Rheology of Emulsions Thickened by Starch Nanoparticles. NANOMATERIALS 2022; 12:nano12142391. [PMID: 35889614 PMCID: PMC9317011 DOI: 10.3390/nano12142391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 07/07/2022] [Accepted: 07/11/2022] [Indexed: 02/05/2023]
Abstract
The rheology of oil-in-water (O/W) emulsions thickened by starch nanoparticles is investigated here. The starch nanoparticle concentration is varied from 0 to 25 wt% based on the matrix aqueous phase. The oil concentration is varied from 0 to 65 wt%. At a given nanoparticle concentration, the emulsions are generally Newtonian at low oil concentrations. The emulsions become shear-thinning at high oil concentrations. The increase in nanoparticle concentration at a given oil concentration increases the consistency of the emulsion and enhances the shear-thinning behavior of emulsion. The rheological behavior of emulsions is described reasonably well by a power-law model. The consistency index of the emulsion increases with the increases in nanoparticle and oil concentrations. The flow behavior index of emulsion decreases with the increases in nanoparticle and oil concentrations, indicating an increase in the degree of shear-thinning in emulsion.
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24
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Hunter SJ, Armes SP. Long-Term Stability of Pickering Nanoemulsions Prepared Using Diblock Copolymer Nanoparticles: Effect of Nanoparticle Core Crosslinking, Oil Type, and the Role Played by Excess Copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8021-8029. [PMID: 35737742 PMCID: PMC9261185 DOI: 10.1021/acs.langmuir.2c00821] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/06/2022] [Indexed: 05/28/2023]
Abstract
A poly(N,N'-dimethylacrylamide) (PDMAC) precursor is chain-extended via reversible addition-fragmentation chain transfer (RAFT) aqueous dispersion polymerization of diacetone acrylamide (PDAAM) to produce PDMAC77-PDAAM40 spherical nanoparticles. Post-polymerization core-crosslinking of such nanoparticles was performed at 20 °C, and the resulting covalently stabilized nanoparticles survive exposure to methanol. The linear and core-crosslinked nanoparticles were subjected to high-shear homogenization in turn in the presence of n-dodecane to form macroemulsions. Subsequent processing of these macroemulsions via high-pressure microfluidization produced nanoemulsions. When using the core crosslinked nanoparticles, the droplet diameter was strongly dependent on the copolymer concentration. This indicates that such nanoparticles remain intact under the processing conditions, leading to formation of genuine Pickering nanoemulsions with a z-average diameter of 244 ± 60 nm. In contrast, the linear nanoparticles undergo disassembly to afford molecularly dissolved diblock copolymer chains, which stabilize oil droplets of 170 ± 59 nm diameter. The long-term stability of these two types of n-dodecane-in-water nanoemulsions with respect to Ostwald ripening was examined using analytical centrifugation. When prepared at the same copolymer concentration, Pickering nanoemulsions stabilized by core-crosslinked nanoparticles proved to be significantly more stable than the nanoemulsion stabilized by the amphiphilic PDMAC77-PDAAM40 chains. Moreover, higher copolymer concentrations led to a significantly faster rate of droplet growth. This is attributed to excess copolymer facilitating the diffusion of n-dodecane through the aqueous phase. Finally, analytical centrifugation is used to assess the long-term stability of the analogous squalane-in-water nanoemulsions. These systems are much more stable than the corresponding n-dodecane-in-water nanoemulsions, regardless of whether the copolymer is adsorbed as sterically stabilized nanoparticles or surface-active chains.
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Affiliation(s)
- Saul J. Hunter
- Department of Chemistry,
Dainton Building, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - Steven P. Armes
- Department of Chemistry,
Dainton Building, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
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25
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Synthesis of pH-Sensitive polydopamine capsules via pickering emulsions stabilized by cellulose nanocrystals to study drug release behavior. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Huang F, Lv J, Li H, Xu S. Regulation rule of cellulose nanocrystals on thixotropy of hydrogel for water shutoff in horizontal wells. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Ataeian P, Shi Q, Ioannidis M, Tam KC. Effect of hydrophobic modification of cellulose nanocrystal (CNC) and salt addition on Pickering emulsions undergoing phase-transition. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2022. [DOI: 10.1016/j.carpta.2022.100201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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28
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Self-assembly of hydrophobically associating amphiphilic polymer with surfactant and its effect on nanoemulsion. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128599] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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Zhang L, Zhang G, Ge J, Jiang P, Ding L. pH- and thermo-responsive Pickering emulsion stabilized by silica nanoparticles and conventional nonionic copolymer surfactants. J Colloid Interface Sci 2022; 616:129-140. [DOI: 10.1016/j.jcis.2022.02.067] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 02/11/2022] [Accepted: 02/16/2022] [Indexed: 11/30/2022]
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30
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Wang J, Zhang K, Zhang L, Song Z, Shang S, Liu H, Wang D. Preparation and stabilization of Pickering emulsions by cationic cellulose nanocrystals synthesized from deep eutectic solvent. Int J Biol Macromol 2022; 209:1900-1913. [PMID: 35487379 DOI: 10.1016/j.ijbiomac.2022.04.164] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 04/19/2022] [Accepted: 04/22/2022] [Indexed: 12/24/2022]
Abstract
In this work, short rod-like cationic cellulose nanocrystals (AH-CNCs) were prepared by sodium periodate oxidation combined with deep eutectic solvent method. The effects of different content AH-CNCs on the properties of the emulsion were studied. With the increase of AH-CNCs content, the diameter of emulsion droplets decreased and the stabilization time prolonged. The electrostatic attraction between the negative charge accumulated at the oil-water interface and AH-CNCs with positive charge improved the stability of the emulsion. Then, the rheological properties showed the interaction of nanocellulose in the continuous phase increased the viscosity of the emulsion. In addition, the droplet diameter of emulsion of 120 s was smaller at different ultrasonic time, the particle size distribution of emulsion changed from monodisperse to polydisperse with the increase of oil volume, the salt concentration had little effect on the droplet size of emulsion, and the preparation of emulsion under acidic conditions was more stable.
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Affiliation(s)
- Jin Wang
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Key Lab. of Biomass Energy and Material, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, People's Republic of China
| | - Kaitao Zhang
- Fiber and Particle Engineering Research Unit University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland
| | - Lei Zhang
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Key Lab. of Biomass Energy and Material, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China
| | - Zhanqian Song
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Key Lab. of Biomass Energy and Material, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China
| | - Shibin Shang
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Key Lab. of Biomass Energy and Material, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China
| | - He Liu
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Key Lab. of Biomass Energy and Material, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China
| | - Dan Wang
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Key Lab. of Biomass Energy and Material, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China.
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31
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Li W, Jiao B, Li S, Faisal S, Shi A, Fu W, Chen Y, Wang Q. Recent Advances on Pickering Emulsions Stabilized by Diverse Edible Particles: Stability Mechanism and Applications. Front Nutr 2022; 9:864943. [PMID: 35600821 PMCID: PMC9121063 DOI: 10.3389/fnut.2022.864943] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/23/2022] [Indexed: 01/03/2023] Open
Abstract
Pickering emulsions, which are stabilized by particles, have gained considerable attention recently because of their extreme stability and functionality. A food-grade particle is preferred by the food or pharmaceutical industries because of their noteworthy natural benefits (renewable resources, ease of preparation, excellent biocompatibility, and unique interfacial properties). Different edible particles are reported by recent publications with distinct shapes resulting from the inherent properties of raw materials and fabrication methods. Furthermore, they possess distinct interfacial properties and functionalities. Therefore, this review provides a comprehensive overview of the recent advances in the stabilization of Pickering emulsions using diverse food-grade particles, as well as their possible applications in the food industry.
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Affiliation(s)
- Wei Li
- Institute of Food Science and Technology, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Bo Jiao
- Institute of Food Science and Technology, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, China
| | - Sisheng Li
- Institute of Food Science and Technology, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Shah Faisal
- Institute of Food Science and Technology, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Aimin Shi
- Institute of Food Science and Technology, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Weiming Fu
- Institute of Food Science and Technology, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Yiying Chen
- Institute of Food Science and Technology, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Qiang Wang
- Institute of Food Science and Technology, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, China
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32
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Du M, Sun Z, Liu Z, Yang Y, Liu Z, Wang Y, Jiang B, Feng Z, Liu C. High efficiency desalination of wasted salted duck egg white and processing into food-grade pickering emulsion stabilizer. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113337] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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33
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Xu G, Nigmatullin R, Koev TT, Khimyak YZ, Bond IP, Eichhorn SJ. Octylamine-Modified Cellulose Nanocrystal-Enhanced Stabilization of Pickering Emulsions for Self-Healing Composite Coatings. ACS APPLIED MATERIALS & INTERFACES 2022; 14:12722-12733. [PMID: 35254045 PMCID: PMC9096801 DOI: 10.1021/acsami.2c01324] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Linseed oil-in-water Pickering emulsions are stabilized by both sulfated CNCs (sCNCs) and octylamine-modified CNCs (oCNCs). oCNCs with hydrophobic moieties grafted on the surfaces of otherwise intact nanocrystals provided emulsions exhibiting stronger resistance to creaming of oil droplets, compared with unmodified sCNCs. sCNCs were not able to completely stabilize linseed oil in water at low CNC concentrations while oCNCs provided emulsions with no unemulsified oil residue at the same concentrations. Oil droplets in oCNC emulsions were smaller than those in samples stabilized by sCNCs, corresponding with an increased hydrophobicity of oCNCs. Cryo-SEM imaging of stabilized droplets demonstrated the formation of a CNC network at the oil-water interface, protecting the oil droplets from coalescence even after compaction under centrifugal force. These oil droplets, protected by a stabilized CNC network, were dispersed in a water-based commercial varnish, to generate a composite coating. Scratches made on these coatings self-healed as a result of the reaction of the linseed oil bled from the damaged droplets with oxygen. The leakage and drying of the linseed oil at the location of the scratches happened without intervention and was accelerated by the application of heat.
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Affiliation(s)
- Guofan Xu
- Bristol
Composites Institute, School of Civil, Aerospace and Mechanical Engineering, University of Bristol, University Walk, Bristol, BS8 1TR, U.K.
| | - Rinat Nigmatullin
- Bristol
Composites Institute, School of Civil, Aerospace and Mechanical Engineering, University of Bristol, University Walk, Bristol, BS8 1TR, U.K.
| | - Todor T. Koev
- School
of Pharmacy, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, U.K.
| | - Yaroslav Z. Khimyak
- School
of Pharmacy, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, U.K.
| | - Ian. P. Bond
- Bristol
Composites Institute, School of Civil, Aerospace and Mechanical Engineering, University of Bristol, University Walk, Bristol, BS8 1TR, U.K.
| | - Stephen J. Eichhorn
- Bristol
Composites Institute, School of Civil, Aerospace and Mechanical Engineering, University of Bristol, University Walk, Bristol, BS8 1TR, U.K.
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34
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Chen R, Ma Z, Sun D, Wang X, Han Y. Cellulose I nanocrystals (CNCs I) prepared in mildly acidic lithium bromide trihydrate (MALBTH) and their application for stabilizing Pickering emulsions. Int J Biol Macromol 2022; 201:59-66. [PMID: 34973269 DOI: 10.1016/j.ijbiomac.2021.12.110] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 11/13/2021] [Accepted: 12/18/2021] [Indexed: 01/04/2023]
Abstract
This study proposed a sustainable method to prepare cellulose I nanocrystals (CNCs I) from microcrystalline cellulose (MCC) in a mildly acidic lithium bromide trihydrate (MALBTH) system, a concentrated (50 wt%) solution of LiBr in water with recyclable formic acid (FA). First, the MCC was treated in the MALBTH system to generate CNCs with a uniform size, yield higher than 68.49% and crystallinity of 84.02%. Then, the CNCs could application for stabilizing Pickering emulsions for at least 15 days. Furthermore, FA was easily recycled from the MALBTH system, and the yield of the CNCs produced from the hydrolysis of MCC by using the recycled FA was still higher than 60%. Finally, this study provided a sustainable and green production of CNCs. A low-cost and environmentally friendly pathway to recover FA from the MALLBTH system at a high yield was still realized.
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Affiliation(s)
- Rui Chen
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials College of Light Industry and Chemical Engineering Dalian Polytechnic University, Dalian 116034, China
| | - Zihao Ma
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials College of Light Industry and Chemical Engineering Dalian Polytechnic University, Dalian 116034, China
| | - Dayin Sun
- Institute of Polymer Science and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Xing Wang
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials College of Light Industry and Chemical Engineering Dalian Polytechnic University, Dalian 116034, China.
| | - Ying Han
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials College of Light Industry and Chemical Engineering Dalian Polytechnic University, Dalian 116034, China.
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Patel AS, Lakshmibalasubramaniam S, Nayak B, Camire ME. Lauric acid adsorbed cellulose nanocrystals retained the physical stability of oil-in-water Pickering emulsion during different dilutions, pH, and storage periods. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107139] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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36
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Miao C, Mirvakili MN, Hamad WY. A rheological investigation of oil-in-water Pickering emulsions stabilized by cellulose nanocrystals. J Colloid Interface Sci 2022; 608:2820-2829. [PMID: 34802766 DOI: 10.1016/j.jcis.2021.11.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 11/01/2021] [Accepted: 11/02/2021] [Indexed: 12/21/2022]
Abstract
HYPOTHESIS High and medium internal phase Pickering emulsions stabilized with cellulose nanocrystals (CNCs) exhibited very different performance compared to their peers stabilized with a surfactant. In this paper, we ascribed the difference to the formation of hydrogen bonding and van der Waals interactions between the CNC nanoparticles on adjacent oil droplets. EXPERIMENTS Rheological properties of CNC-stabilized oil-in-water medium internal phase emulsions (MIPEs, oil content = 65% v/v) and high internal phase emulsions (HIPEs, oil content = 80% v/v) were comprehensively characterized using both oscillatory and rotational tests. FINDINGS It was found that in the MIPEs, the van der Waals and hydrogen bonding interactions dominate the emulsion properties, whereas the compact structure of oil droplets plays a more important role in the HIPEs. CNC concentration in the aqueous phase also affects the emulsion properties, especially for the HIPEs, and the results can be correlated to the stabilization mechanisms we previously reported. The information from these tests provides a much-needed guidance for the practical application of CNC-stabilized emulsions.
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Affiliation(s)
- Chuanwei Miao
- Transformation and Interfaces Group, Bioproducts Innovation Centre of Excellence, FPInnovations, 2665 East Mall, Vancouver, BC V6T 1Z4, Canada
| | - Mehr-Negar Mirvakili
- Transformation and Interfaces Group, Bioproducts Innovation Centre of Excellence, FPInnovations, 2665 East Mall, Vancouver, BC V6T 1Z4, Canada
| | - Wadood Y Hamad
- Transformation and Interfaces Group, Bioproducts Innovation Centre of Excellence, FPInnovations, 2665 East Mall, Vancouver, BC V6T 1Z4, Canada.
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Pradhan SS, Saha S. Advances in design and applications of polymer brush modified anisotropic particles. Adv Colloid Interface Sci 2022; 300:102580. [PMID: 34922246 DOI: 10.1016/j.cis.2021.102580] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 11/24/2021] [Accepted: 11/30/2021] [Indexed: 12/17/2022]
Abstract
Current advancements in the creation of anisotropy in particles and their surface modification with polymer brushes have established a new class of hybrid materials termed polymer brush modified anisotropic particles (PBMAP). PBMAPs display unique property combinations, e.g., multi-functionality in multiple directions along with smart behavior, which is not easily achievable in traditional hybrid materials. Typically, anisotropic particles can be categorized based on three different factors, such as shape anisotropy (geometry driven), compositional anisotropy (functionality driven), and surface anisotropy (spatio-selective surface modification driven). In this review, we have particularly focused on the synthetic strategies to construct the various type of PBMAPs based on inorganic or organic core which may or may not be isotropic in nature, and their applications in various fields ranging from drug delivery to catalysis. In addition, superior performances and fascinating properties of PBMAPs over their isotropic analogues are also highlighted. A brief overview of their future developments and associated challenges have been discussed at the end.
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Affiliation(s)
| | - Sampa Saha
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi, India.
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Defibrillated microcrystalline cellulose as an efficient emulsion stabilizer – Study of food-grade Pickering emulsions resistant to extreme conditions. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.113006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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39
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Costa ALR, Gomes A, Cangussu LB, Cunha RL, de Oliveira LS, Franca AS. Stabilization mechanisms of O/W emulsions by cellulose nanocrystals and sunflower protein. Food Res Int 2022; 152:110930. [DOI: 10.1016/j.foodres.2021.110930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 12/22/2021] [Accepted: 12/25/2021] [Indexed: 11/04/2022]
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40
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Cook AB, Schlich M, Manghnani PN, Moore TL, Decuzzi P, Palange AL. Size effects of discoidal
PLGA
nanoconstructs in Pickering emulsion stabilization. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20210748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Alexander B. Cook
- Laboratory of Nanotechnology for Precision Medicine Istituto Italiano di Tecnologia Genoa Italy
| | - Michele Schlich
- Laboratory of Nanotechnology for Precision Medicine Istituto Italiano di Tecnologia Genoa Italy
| | - Purnima N. Manghnani
- Laboratory of Nanotechnology for Precision Medicine Istituto Italiano di Tecnologia Genoa Italy
| | - Thomas L. Moore
- Laboratory of Nanotechnology for Precision Medicine Istituto Italiano di Tecnologia Genoa Italy
| | - Paolo Decuzzi
- Laboratory of Nanotechnology for Precision Medicine Istituto Italiano di Tecnologia Genoa Italy
| | - Anna Lisa Palange
- Laboratory of Nanotechnology for Precision Medicine Istituto Italiano di Tecnologia Genoa Italy
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41
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Parajuli S, Ureña-Benavides EE. Fundamental aspects of nanocellulose stabilized Pickering emulsions and foams. Adv Colloid Interface Sci 2022; 299:102530. [PMID: 34610863 DOI: 10.1016/j.cis.2021.102530] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/15/2021] [Accepted: 09/25/2021] [Indexed: 11/26/2022]
Abstract
Nanocelluloses in recent years have garnered a lot of attention for their use as stabilizers of liquid-liquid and gas-liquid interfaces. Both cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs) have been used extensively in multiple studies to prepare emulsions and foams. However, there is limited literature available that systematically discusses the mechanisms that affect the ability of nanocelluloses (modified and unmodified) to stabilize different types of interfaces. This review briefly discusses key factors that affect the stability of Pickering emulsions and foams and provides a detailed and systematic analysis of the current state knowledge on factors affecting the stabilization of liquid-liquid and gas-liquid interfaces by nanocelluloses. The review also discusses the effect of nanocellulose surface modifications on mechanisms driving the Pickering stabilization of these interfaces.
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42
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Zhang Z, Sèbe G, Hou Y, Wang J, Huang J, Zhou G. Grafting polymers from cellulose nanocrystals via surface‐initiated atom transfer radical polymerization. J Appl Polym Sci 2021. [DOI: 10.1002/app.51458] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zhen Zhang
- SCNU‐TUE Joint Lab of Device Integrated Responsive Materials (DIRM), National Center for International Research on Green Optoelectronics South China Normal University Guangzhou China
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics South China Normal University Guangzhou China
| | - Gilles Sèbe
- Laboratoire de Chimie des Polymères Organiques University of Bordeaux, CNRS, Bordeaux INP Pessac France
| | - Yelin Hou
- Laboratoire de Chimie des Polymères Organiques University of Bordeaux, CNRS, Bordeaux INP Pessac France
| | | | - Jin Huang
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Soft‐Matter Material Chemistry and Function Manufacturing, and “the Belt and Road” International Joint Research Laboratory of Sustainable Materials Southwest University Chongqing China
- School of Chemistry and Chemical Engineering, and Engineering Research Center of Materials‐Oriented Chemical Engineering of Xinjiang Bintuan Shihezi University Shihezi China
| | - Guofu Zhou
- SCNU‐TUE Joint Lab of Device Integrated Responsive Materials (DIRM), National Center for International Research on Green Optoelectronics South China Normal University Guangzhou China
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics South China Normal University Guangzhou China
- Shenzhen Guohua Optoelectronics Tech. Co. Ltd. Shenzhen China
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43
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Rigg A, Champagne P, Cunningham MF. Polysaccharide-Based Nanoparticles as Pickering Emulsifiers in Emulsion Formulations and Heterogenous Polymerization Systems. Macromol Rapid Commun 2021; 43:e2100493. [PMID: 34841604 DOI: 10.1002/marc.202100493] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/27/2021] [Indexed: 12/20/2022]
Abstract
Bio-based Pickering emulsifiers are a nontoxic alternative to surfactants in emulsion formulations and heterogenous polymerizations. Recent demand for biocompatible and sustainable formulations has accelerated academic interest in polysaccharide-based nanoparticles as Pickering emulsifiers. Despite the environmental advantages, the inherent hydrophilicity of polysaccharides and their nanoparticles limits efficiency and application range. Modification of the polysaccharide surface is often required in the development of ultrastable, functional, and water-in-oil (W/O) systems. Complex surface modification calls into question the sustainability of polysaccharide-based nanoparticles and is identified as a significant barrier to commercialization. This review summarizes the use of nanocelluloses, -starches, and -chitins as Pickering emulsifiers, highlights trends and best practices in surface modification, and provides recommendations to expedite commercialization.
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Affiliation(s)
- Amanda Rigg
- Department of Chemical Engineering, 19 Division Street, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Pascale Champagne
- Beaty Water Research Centre, Department of Civil Engineering, Union Street, Queen's University, Kingston, ON, K7L 3N6, Canada.,Institut National de la Recherche Scientifique (INRS), 490 rue de la Couronne, Quebec City, Quebec, G1K 9A9, Canada
| | - Michael F Cunningham
- Department of Chemical Engineering, 19 Division Street, Queen's University, Kingston, ON, K7L 3N6, Canada.,Department of Chemistry, 90 Bader Lane, Queen's University, Kingston, ON, K7L 3N6, Canada
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45
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Gao Y, Xiang Z, Zhao X, Wang G, Qi C. Pickering Emulsions Stabilized by Diblock Copolymer Worms Prepared via Reversible Addition-Fragmentation Chain Transfer Aqueous Dispersion Polymerization: How Does the Stimulus Sensitivity Affect the Rate of Demulsification? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11695-11706. [PMID: 34579524 DOI: 10.1021/acs.langmuir.1c01609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Responsive Pickering emulsions exhibit promising application in industry owing to the integration of the high storage stability with on-demand demulsification. In this study, stimuli-responsive Pickering emulsions stabilized by poly[oligo(ethylene glycol) methyl ether methacrylate]15-b-poly(diacetone acrylamide)120 (E15D120) worms were indicated, in which E15D120 worms were prepared via reversible addition-fragmentation chain transfer-based aqueous dispersion polymerization using thermo-sensitive POEGMA15 as both the stabilizer block and macro-chain transfer agent. The factors influencing the morphologies of copolymers during polymerization-induced self assembly have been investigated. A series of different morphological polymer nanoparticles including spheres, worms, and vesicles could be produced through rational synthesis. E15D120 worms demonstrated excellent emulsifying performances and could be used as emulsifiers to form n-dodecane-in-water Pickering emulsions at a low content. The formed n-dodecane-in-water Pickering emulsions revealed a slow demulsification at pH 10 or 70 °C or pH 10/70 °C combinations, and several hours were needed for the demulsification of Pickering emulsions. However, n-dodecane-in-water Pickering emulsions displayed a rapid demulsification (∼10 min) at an elevated temperature, such as 90 °C. The different demulsification rates were attributed to different sensitivities of E15D120 worms to external stimuli. Pickering emulsions integrating a rapid responsive demulsification with a slow one would be well satisfactory on different occasions.
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Affiliation(s)
- Yong Gao
- Key Laboratory of Alternative Technologies for Fine Chemicals Process of Zhejiang Province, College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China
- College of Chemistry and Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education; Key Laboratory of Polymeric Materials & Application Technology of Hunan Province, Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, Xiangtan University, Xiangtan, Hunan Province 411105, China
| | - Zhe Xiang
- College of Chemistry and Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education; Key Laboratory of Polymeric Materials & Application Technology of Hunan Province, Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, Xiangtan University, Xiangtan, Hunan Province 411105, China
| | - Xi Zhao
- Key Laboratory of Alternative Technologies for Fine Chemicals Process of Zhejiang Province, College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China
- College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan Province 414006, China
| | - Guoxiang Wang
- College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan Province 414006, China
| | - Chenze Qi
- Key Laboratory of Alternative Technologies for Fine Chemicals Process of Zhejiang Province, College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China
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46
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Bertsch P, Bergfreund J, Windhab EJ, Fischer P. Physiological fluid interfaces: Functional microenvironments, drug delivery targets, and first line of defense. Acta Biomater 2021; 130:32-53. [PMID: 34077806 DOI: 10.1016/j.actbio.2021.05.051] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 12/13/2022]
Abstract
Fluid interfaces, i.e. the boundary layer of two liquids or a liquid and a gas, play a vital role in physiological processes as diverse as visual perception, oral health and taste, lipid metabolism, and pulmonary breathing. These fluid interfaces exhibit a complex composition, structure, and rheology tailored to their individual physiological functions. Advances in interfacial thin film techniques have facilitated the analysis of such complex interfaces under physiologically relevant conditions. This allowed new insights on the origin of their physiological functionality, how deviations may cause disease, and has revealed new therapy strategies. Furthermore, the interactions of physiological fluid interfaces with exogenous substances is crucial for understanding certain disorders and exploiting drug delivery routes to or across fluid interfaces. Here, we provide an overview on fluid interfaces with physiological relevance, namely tear films, interfacial aspects of saliva, lipid droplet digestion and storage in the cell, and the functioning of lung surfactant. We elucidate their structure-function relationship, discuss diseases associated with interfacial composition, and describe therapies and drug delivery approaches targeted at fluid interfaces. STATEMENT OF SIGNIFICANCE: Fluid interfaces are inherent to all living organisms and play a vital role in various physiological processes. Examples are the eye tear film, saliva, lipid digestion & storage in cells, and pulmonary breathing. These fluid interfaces exhibit complex interfacial compositions and structures to meet their specific physiological function. We provide an overview on physiological fluid interfaces with a focus on interfacial phenomena. We elucidate their structure-function relationship, discuss diseases associated with interfacial composition, and describe novel therapies and drug delivery approaches targeted at fluid interfaces. This sets the scene for ocular, oral, or pulmonary surface engineering and drug delivery approaches.
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47
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Dong H, Ding Q, Jiang Y, Li X, Han W. Pickering emulsions stabilized by spherical cellulose nanocrystals. Carbohydr Polym 2021; 265:118101. [DOI: 10.1016/j.carbpol.2021.118101] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 12/11/2022]
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48
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Kiriakou MV, Berry RM, Hoare T, Cranston ED. Effect of Reaction Media on Grafting Hydrophobic Polymers from Cellulose Nanocrystals via Surface-Initiated Atom-Transfer Radical Polymerization. Biomacromolecules 2021; 22:3601-3612. [PMID: 34252279 DOI: 10.1021/acs.biomac.1c00692] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Hydrophobic polymer-grafted cellulose nanocrystals (CNCs) were produced via surface-initiated atom-transfer radical polymerization (SI-ATRP) in two different solvents to examine the role of reaction media on the extent of surface modification. Poly(butyl acrylate)-grafted CNCs were synthesized in either dimethylformamide (DMF) (D-PBA-g-CNCs) or toluene (T-PBA-g-CNCs) alongside a free polymer from a sacrificial initiator. The colloidal stability of unmodified CNCs, initiator-modified CNCs, and PBA-g-CNCs in water, DMF, and toluene was evaluated by optical transmittance. The enhanced colloidal stability of initiator-modified CNCs in DMF led to improved accessibility to initiator groups during polymer grafting; D-PBA-g-CNCs had 30 times more grafted chains than T-PBA-g-CNCs, determined by thermogravimetric and elemental analysis. D-PBA-g-CNCs dispersed well in toluene and were hydrophobic with a water contact angle of 124° (for polymer grafts > 13 kDa) compared to 25° for T-PBA-g-CNCs. The cellulose crystal structure was preserved, and individual nanoparticles were retained when grafting was carried out in either solvent. This work highlights that optimizing CNC colloidal stability prior to grafting is more crucial than solvent-polymer compatibility to obtain high graft densities and highly hydrophobic CNCs via SI-ATRP.
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Affiliation(s)
- Michael V Kiriakou
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Richard M Berry
- CelluForce Inc., 570 boulevard Saint-Jean, Pointe-Claire, Quebec H9R 3J9, Canada
| | - Todd Hoare
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Emily D Cranston
- Departments of Wood Science and Chemical & Biological Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z2, Canada
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49
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Kedzior SA, Gabriel VA, Dubé MA, Cranston ED. Nanocellulose in Emulsions and Heterogeneous Water-Based Polymer Systems: A Review. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2002404. [PMID: 32797718 DOI: 10.1002/adma.202002404] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/25/2020] [Indexed: 06/11/2023]
Abstract
Nanocelluloses (i.e., bacterial nanocellulose, cellulose nanocrystals, and cellulose nanofibrils) are cellulose-based materials with at least one dimension in the nanoscale. These materials have unique and useful properties and have been shown to assemble at oil-water interfaces and impart new functionality to emulsion and latex systems. Herein, the use of nanocellulose in both emulsions and heterogeneous water-based polymers is reviewed, including dispersion, suspension, and emulsion polymerization. Comprehensive tables describe past work employing nanocellulose as stabilizers or additives and the properties that can be tailored through the use of nanocellulose are highlighted. Even at low loadings, nanocellulose offers an unprecedented level of control as a property modifier for a range of emulsion and polymer applications, influencing, for example, emulsion type, stability, and stimuli-responsive behavior. Nanocellulose can tune polymer particle properties such as size, surface charge, and morphology, or be used to produce capsules and polymer nanocomposites with enhanced mechanical, thermal, and adhesive properties. The role of nanocellulose is discussed, and a perspective for future direction is presented.
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Affiliation(s)
- Stephanie A Kedzior
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
| | - Vida A Gabriel
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Pvt., Ottawa, ON, K1N 6N5, Canada
| | - Marc A Dubé
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Pvt., Ottawa, ON, K1N 6N5, Canada
| | - Emily D Cranston
- Department of Wood Science, Department of Chemical & Biological Engineering, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada
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50
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Courtenay JC, Jin Y, Schmitt J, Hossain KMZ, Mahmoudi N, Edler KJ, Scott JL. Salt-Responsive Pickering Emulsions Stabilized by Functionalized Cellulose Nanofibrils. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:6864-6873. [PMID: 34081858 DOI: 10.1021/acs.langmuir.0c03306] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Oil-in-water emulsions have been stabilized by functionalized cellulose nanofibrils bearing either a negative (oxidized cellulose nanofibrils, OCNF) or a positive (cationic cellulose nanofibrils, CCNF) surface charge. The size of the droplets was measured by laser diffraction, while the structure of the shell of the Pickering emulsion droplets was probed using small-angle neutron scattering (SANS), confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM), and rheology measurements. Both OCNF- and CCNF-stabilized emulsions present a very thick shell (>100 nm) comprised of densely packed CNF. OCNF-stabilized emulsions proved to be salt responsive, influencing the droplet aggregation and ultimately the gel properties of the emulsions, while CCNF emulsions, on the other hand, showed very little salt-dependent behavior.
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Affiliation(s)
- James C Courtenay
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
- Centre for Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Yun Jin
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Julien Schmitt
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
- LSFC, Laboratoire de Synthèse et Fonctionnalisation des Céramiques, UMR 3080 CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 550 Avenue Alphonse Jauffret, Cavaillon 84300, France
| | - Kazi M Zakir Hossain
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Najet Mahmoudi
- ISIS Neutron & Muon Source, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - Karen J Edler
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Janet L Scott
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
- Centre for Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
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