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Deane O, Mandrelier P, Musa OM, Jamali M, Fielding LA, Armes SP. Synthesis and Characterization of All-Acrylic Tetrablock Copolymer Nanoparticles: Waterborne Thermoplastic Elastomers via One-Pot RAFT Aqueous Emulsion Polymerization. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2024; 36:2061-2075. [PMID: 38435050 PMCID: PMC10902817 DOI: 10.1021/acs.chemmater.3c03115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 03/05/2024]
Abstract
Reversible addition-fragmentation chain transfer (RAFT) aqueous emulsion polymerization is used to prepare well-defined ABCB tetrablock copolymer nanoparticles via sequential monomer addition at 30 °C. The A block comprises water-soluble poly(2-(N-acryloyloxy)ethyl pyrrolidone) (PNAEP), while the B and C blocks comprise poly(t-butyl acrylate) (PtBA) and poly(n-butyl acrylate) (PnBA), respectively. High conversions are achieved at each stage, and the final sterically stabilized spherical nanoparticles can be obtained at 20% w/w solids at pH 3 and at up to 40% w/w solids at pH 7. A relatively long PnBA block is targeted to ensure that the final tetrablock copolymer nanoparticles form highly transparent films on drying such aqueous dispersions at ambient temperature. The kinetics of polymerization and particle growth are studied using 1H nuclear magnetic resonance spectroscopy, dynamic light scattering, and transmission electron microscopy, while gel permeation chromatography analysis confirmed a high blocking efficiency for each stage of the polymerization. Differential scanning calorimetry and small-angle X-ray scattering studies confirm microphase separation between the hard PtBA and soft PnBA blocks, and preliminary mechanical property measurements indicate that such tetrablock copolymer films exhibit promising thermoplastic elastomeric behavior. Finally, it is emphasized that targeting an overall degree of polymerization of more than 1000 for such tetrablock copolymers mitigates the cost, color, and malodor conferred by the RAFT agent.
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Affiliation(s)
- Oliver
J. Deane
- Department
of Chemistry, University of Sheffield, Dainton Building, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - Pierre Mandrelier
- Department
of Chemistry, University of Sheffield, Dainton Building, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - Osama M. Musa
- Ashland
Specialty Ingredients, 1005 US 202/206, Bridgewater, New Jersey 08807, United States
| | - Mohammed Jamali
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Henry
Royce Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Lee A. Fielding
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Henry
Royce Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Steven P. Armes
- Department
of Chemistry, University of Sheffield, Dainton Building, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
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2
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Yin Y, Wang Z, Zou H. Synthesis of dimpled polymer-silica nanocomposite particles by interfacial swelling-based seeded polymerization. SOFT MATTER 2024; 20:429-436. [PMID: 38111340 DOI: 10.1039/d2sm00810f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Dimpled polymer-silica nanocomposite particles have the combined advantages of dimpled particles and polymer-silica nanocomposite particles. This study presents a novel approach to prepare these particles by interfacial swelling-based seeded polymerization. Polystyrene-silica (PS-SiO2) nanocomposite particles are first prepared by emulsion polymerization of styrene in the presence of glycerol-functionalized silica sols and then dimpled polymer-SiO2 particles are fabricated by interfacial swelling of butyl acrylate (BA)/toluene and subsequent seeded polymerization of BA with the PS-SiO2 particles as seeds. The effects of different parameters, such as the amount of surfactant used in the PS-SiO2/H2O dispersion, BA/toluene mass ratio, PS-SiO2/H2O mass ratio and stirring rate, on the formation of the dimpled particles are investigated. Optimization of the seeded polymerization conditions allows a relatively high percentage of dimpled particles to be achieved.
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Affiliation(s)
- Yiping Yin
- School of Materials and Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China.
| | - Zhe Wang
- School of Materials and Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China.
| | - Hua Zou
- School of Materials and Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China.
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3
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Wang Y, Sun B, Hao Z, Zhang J. Advances in Organic-Inorganic Hybrid Latex Particles via In Situ Emulsion Polymerization. Polymers (Basel) 2023; 15:2995. [PMID: 37514385 PMCID: PMC10385736 DOI: 10.3390/polym15142995] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 06/29/2023] [Accepted: 07/03/2023] [Indexed: 07/30/2023] Open
Abstract
Hybrid latex particles combine the unique properties of inorganic nano/micro particles with the inherent properties of polymers, exhibiting tremendous potential for a variety of applications. Recent years have witnessed an increased interest in the design and preparation of hybrid latex particles with well-defined size, structure and morphology. Due to its simplicity, versatility and environmental friendliness, the in situ (Pickering) emulsion polymerization has been demonstrated to be a powerful approach for the large-scale preparation of hybrid latex particles. In this review, the strategies and applications of in situ (Pickering) emulsion polymerization for the preparation of hybrid latex particles are systematically summarized. A particular focus is placed on the strategies for the preparation of hybrid latex particles with enhanced properties and well-defined core-shell, yolk-shell, multinuclear, raspberry-like, dumbbell-shaped, multipod-like or armored morphologies. We hope that the considerable advances, examples and principles presented in this review can motivate future contributions to provide a deeper understanding of current preparation technologies, develop new processes, and enable further exploitation of hybrid latex particles with outstanding characteristics and properties.
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Affiliation(s)
- Yubin Wang
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- CNPC Engineering Technology Research Co., Ltd., Tianjin 300451, China
| | - Baojiang Sun
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Zhiwei Hao
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- CNPC Engineering Technology Research Co., Ltd., Tianjin 300451, China
| | - Jianhua Zhang
- Department of Polymer Science and Engineering, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
- Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, China
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4
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Ip HT, Liu L, Hong L, Ngai T. Synthesis of polystyrene/silica and poly(styrene-co-butyl acrylate)/silica nanocomposite particles by Pickering emulsion polymerization with non-functionalized silica nanoparticles. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Tercki D, Orlińska B, Słotwińska D, Sajdak M. Pickering emulsions as an alternative to traditional polymers: trends and applications. REV CHEM ENG 2022. [DOI: 10.1515/revce-2022-0011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Pickering emulsions have gained increasing interest because of their unique features, including easy preparation and stability. In contrast to classical emulsions, in Pickering emulsions, the stabilisers are solid micro/nanoparticles that accumulate on the surfaces of liquid phases. In addition to their stability, Pickering emulsions are less toxic and responsive to external stimuli, which make them versatile material that can be flexibly designed for specific applications, e.g., catalysis, pharmaceuticals and new materials. The potential toxicity and adverse impact on the environment of classic emulsions is related to the extractable nature of the water emulsifier. The impacts of some emulsifiers are related to not only their chemical natures but also their stabilities; after base or acid hydrolysis, some emulsifiers can be turned into sulphates and fatty alcohols, which are dangerous to aquatic life. In this paper, recent research on Pickering emulsion preparations is reviewed, with a focus on styrene as one of the main emulsion components. Moreover, the effects of the particle type and morphology and the critical parameters of the emulsion production process on emulsion properties and applications are discussed. Furthermore, the current and prospective applications of Pickering emulsion, such as in lithium-ion batteries and new vaccines, are presented.
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Affiliation(s)
- Dariusz Tercki
- Department of Organic Chemical Technology and Petrochemistry , PhD School, Silesian University of Technology , Akademicka 2a, 44-100 Gliwice , Poland
- Synthos S.A. , ul. Chemików 1, 32-600 Oświęcim , Poland
| | - Beata Orlińska
- Department of Organic Chemical Technology and Petrochemistry , Silesian University of Technology , B. Krzywoustego 4, 44-100 Gliwice , Poland
| | | | - Marcin Sajdak
- Department of Air Protection, Silesian University of Technology , S. Konarskiego 22B, 44-100 Gliwice , Poland
- School of Chemical Engineering, University of Birmingham , Edgbaston , Birmingham B15 2TT , UK
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6
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Lv Y, Suo H, Zou H. An emulsion swelling route to surface-wrinkled polystyrene-silica colloidal nanocomposite particles. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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7
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Li K, Dugas PY, Lansalot M, Bourgeat-Lami E. Synthesis of Iron Oxide-Armored Latex Particles by Pickering Emulsion Polymerization Using 2-Acrylamido-2-methyl-1-propane Sulfonic Acid as an Auxiliary Comonomer. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Keran Li
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500 Sichuan, China
- University Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43, Bvd. du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Pierre-Yves Dugas
- University Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43, Bvd. du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Muriel Lansalot
- University Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43, Bvd. du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Elodie Bourgeat-Lami
- University Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43, Bvd. du 11 Novembre 1918, 69616 Villeurbanne, France
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8
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Xu A, Zhang T, Zhan C, Wei H, Ip HT, Hong L, Ngai T. Nanocomposite Polymer Colloids Prepared via Emulsion Polymerization and Stabilized Using Polydopamine-Coated Silica Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5454-5463. [PMID: 35481741 DOI: 10.1021/acs.langmuir.1c03441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Polymer/inorganic colloidal nanocomposites can be prepared via Pickering emulsion polymerization (PEP); however, this process usually requires the use of surfactants, auxiliary comonomers, and volatile organic compounds. Herein, we report a versatile and efficient method for synthesizing stable monodisperse polymer/silica colloidal nanocomposite particles via PEP. First, silica nanoparticles were modified by depositing a multifunctional polydopamine (PDA) film. The outermost PDA film could enhance the precipitation of oligomeric polymer radicals on the silica surface, which is crucial for the preparation of stable polymer/inorganic colloidal nanocomposites via PEP. Notably, this PDA modification approach can employ different initiator systems, such as cationic initiators and redox initiator couples, and can be applied to various monomers and monomer pairs (St, St/nBA, MMA, MMA/nBA, Vac, Vac/nBA). The influence of the concentration and size of polydopamine-coated silica (SiO2@PDA) on the colloidal nanocomposite was investigated. Increasing the diameter of SiO2@PDA and decreasing the concentration of SiO2@PDA both lead to the formation of larger nanocomposite particles. Considering its wide applicability, the proposed PDA modification approach can be applied to other functional inorganic particles to prepare multifunctional polymer/inorganic nanocomposite particles.
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Affiliation(s)
- Anli Xu
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Tongtong Zhang
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Chengdong Zhan
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Hongxin Wei
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Hiu To Ip
- Department of Chemistry, The Chinese University of Hong Kong, Shatin N.T., Hong Kong, China
| | - Liangzhi Hong
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, China
| | - To Ngai
- Department of Chemistry, The Chinese University of Hong Kong, Shatin N.T., Hong Kong, China
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9
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Czajka A, Liao G, Mykhaylyk OO, Armes SP. In situ small-angle X-ray scattering studies during the formation of polymer/silica nanocomposite particles in aqueous solution. Chem Sci 2021; 12:14288-14300. [PMID: 34760215 PMCID: PMC8565378 DOI: 10.1039/d1sc03353k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 10/04/2021] [Indexed: 11/30/2022] Open
Abstract
This study is focused on the formation of polymer/silica nanocomposite particles prepared by the surfactant-free aqueous emulsion polymerization of 2,2,2-trifluoroethyl methacrylate (TFEMA) in the presence of 19 nm glycerol-functionalized aqueous silica nanoparticles using a cationic azo initiator at 60 °C. The TFEMA polymerization kinetics are monitored using 1H NMR spectroscopy, while postmortem TEM analysis confirms that the final nanocomposite particles possess a well-defined core-shell morphology. Time-resolved small-angle X-ray scattering (SAXS) is used in conjunction with a stirrable reaction cell to monitor the evolution of the nanocomposite particle diameter, mean silica shell thickness, mean number of silica nanoparticles within the shell, silica aggregation efficiency and packing density during the TFEMA polymerization. Nucleation occurs after 10-15 min and the nascent particles quickly become swollen with TFEMA monomer, which leads to a relatively fast rate of polymerization. Additional surface area is created as these initial particles grow and anionic silica nanoparticles adsorb at the particle surface to maintain a relatively high surface coverage and hence ensure colloidal stability. At high TFEMA conversion, a contiguous silica shell is formed and essentially no further adsorption of silica nanoparticles occurs. A population balance model is introduced into the SAXS model to account for the gradual incorporation of the silica nanoparticles within the nanocomposite particles. The final PTFEMA/silica nanocomposite particles are obtained at 96% TFEMA conversion after 140 min, have a volume-average diameter of 216 ± 9 nm and contain approximately 274 silica nanoparticles within their outer shells; a silica aggregation efficiency of 75% can be achieved for such formulations.
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Affiliation(s)
- A Czajka
- Department of Chemistry, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
| | - G Liao
- Department of Chemistry, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
| | - O O Mykhaylyk
- Department of Chemistry, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
| | - S P Armes
- Department of Chemistry, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
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10
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El-Sawy AM, Gemeay AH, Helal AS, Salem MA. Catalytic degradation of methylene blue in aqueous solution by H2O2 and SiO2-NH2-Cu(II)@SiO2 nanoparticles as catalyst. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117422] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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11
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Ren D, Xu J, Chen N, Ye Z, Li X, Chen Q, Ma S. Controlled synthesis of mesoporous silica nanoparticles with tunable architectures via oil-water microemulsion assembly process. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125773] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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12
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Ishihara M, Kaeda T, Sasaki T. Silica/polymer core–shell particles prepared via soap-free emulsion polymerization. E-POLYMERS 2020. [DOI: 10.1515/epoly-2020-0028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this study, core–shell particles were prepared as a hybrid material, in which a thin polymer shell was formed on the surface of the SiO2 sphere particles. The core–shell structure was successfully achieved without adding a surfactant via simple free-radical polymerization (soap-free emulsion polymerization) for various monomers of styrene, methyl methacrylate (MMA), and their derivatives. MMA formed thin homogeneous shells of polymer (PMMA) less than 100 nm in thickness with complete surface coverage and a very smooth shell surface. The obtained shell morphology strongly depended on the monomers, which suggests different shell formation mechanisms with respect to the monomers. It was found that the cross-linking monomer 1,4-divinylbenzene tends to promote shell formation, and the cross-linking reaction may stabilize the core–shell structure throughout radical polymerization. It should also be noted that the present method produced a considerable amount of pure polymer besides the core–shell particles. The glass transition temperatures of the obtained polymer shells were higher than those of the corresponding bulk materials. This result suggests strong interactions at the core–shell interface.
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Affiliation(s)
- Mina Ishihara
- Department of Materials Science and Engineering, University of Fukui , 3-9-1 Bunkyo , Fukui , 910 8507 , Japan
| | - Tomofumi Kaeda
- Department of Materials Science and Engineering, University of Fukui , 3-9-1 Bunkyo , Fukui , 910 8507 , Japan
| | - Takashi Sasaki
- Department of Materials Science and Engineering, University of Fukui , 3-9-1 Bunkyo , Fukui , 910 8507 , Japan
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13
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Kim GH, Hwang SW, Kang DH, Jung BN, Lee MJ, Shim JK, Seo KH. Controllable synthesis of silica nanoparticle size and packing efficiency onto PVP‐functionalized PMMA via a sol–gel method. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20190115] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Gi H. Kim
- Korea Packaging CenterKorea Institute of Industrial Technology 14449 Bucheon South Korea
- School of Applied Chemical Engineering, Kyungpook National University 41566 Daegu South Korea
| | - Sung W. Hwang
- Department of Chemical EngineeringKeimyung University 42601 Daegu South Korea
| | - Dong H. Kang
- Korea Packaging CenterKorea Institute of Industrial Technology 14449 Bucheon South Korea
| | - Bich N. Jung
- Korea Packaging CenterKorea Institute of Industrial Technology 14449 Bucheon South Korea
| | - Mi J. Lee
- Korea Packaging CenterKorea Institute of Industrial Technology 14449 Bucheon South Korea
| | - Jin K. Shim
- Korea Packaging CenterKorea Institute of Industrial Technology 14449 Bucheon South Korea
| | - Kwan H. Seo
- Department of Polymer Science and EngineeringKyungpook National University 41566 Daegu South Korea
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14
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Zeng R, Chen Y, Zhang L, Tan J. Uncontrolled polymerization that occurred during photoinitiated RAFT dispersion polymerization of acrylic monomers promotes the formation of uniform raspberry-like polymer particles. Polym Chem 2020. [DOI: 10.1039/d0py00678e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Uniform raspberry-like polymer particles are prepared by a different type of photoinitiated RAFT dispersion polymerization.
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Affiliation(s)
- Ruiming Zeng
- Department of Polymeric Materials and Engineering
- School of Materials and Energy
- Guangdong University of Technology
- Guangzhou 510006
- China
| | - Ying Chen
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter
- Guangzhou 510006
- China
| | - Li Zhang
- Department of Polymeric Materials and Engineering
- School of Materials and Energy
- Guangdong University of Technology
- Guangzhou 510006
- China
| | - Jianbo Tan
- Department of Polymeric Materials and Engineering
- School of Materials and Energy
- Guangdong University of Technology
- Guangzhou 510006
- China
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16
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Zou H, Liu J, Wang X. Surfactant-free emulsion copolymerization of styrene and a cationic comonomer with two positively charged groups. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04521-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Limousin E, Ballard N, Asua JM. Synthesis of cellulose nanocrystal armored latex particles for mechanically strong nanocomposite films. Polym Chem 2019. [DOI: 10.1039/c8py01785a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Mechanically strong films are generated from cellulose nanocrystal armored latex particles synthesized by emulsion polymerization.
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Affiliation(s)
- Elodie Limousin
- POLYMAT and Departamento de Química Aplicada
- Facultad de Ciencias Químicas
- University of the Basque Country UPV/EHU
- Donostia-San Sebastián 20018
- Spain
| | - Nicholas Ballard
- POLYMAT and Departamento de Química Aplicada
- Facultad de Ciencias Químicas
- University of the Basque Country UPV/EHU
- Donostia-San Sebastián 20018
- Spain
| | - José M. Asua
- POLYMAT and Departamento de Química Aplicada
- Facultad de Ciencias Químicas
- University of the Basque Country UPV/EHU
- Donostia-San Sebastián 20018
- Spain
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18
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Lotierzo A, Meaney SP, Bon SAF. Effect of the addition of salt to Pickering emulsion polymerizations using polymeric nanogels as stabilizers. Polym Chem 2019. [DOI: 10.1039/c9py01240k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanogels made from crosslinked block copolymer micelles are used as stabilizers in the Pickering emulsion polymerization of styrene.
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Affiliation(s)
- Andrea Lotierzo
- Department of Chemistry
- University of Warwick
- Coventry CV4 7AL
- UK
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19
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Tiwari I, Mahanwar PA. Polyacrylate/silica hybrid materials: A step towards multifunctional properties. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1489276] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Ingita Tiwari
- Department of Polymer and Surface Engineering, Institute of Chemical Technology , Mumbai , India
| | - P. A. Mahanwar
- Department of Polymer and Surface Engineering, Institute of Chemical Technology , Mumbai , India
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20
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Ma YY, Li WX, Zheng YS, Bao JR, Li YL, Feng LN, Yang KS, Qiao Y, Wu AP. Preparation, characterization and luminescence properties of core-shell ternary terbium composites SiO 2(600)@Tb(MABA-Si)•L. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171655. [PMID: 29657773 PMCID: PMC5882697 DOI: 10.1098/rsos.171655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 02/09/2018] [Indexed: 05/31/2023]
Abstract
Two novel core-shell structure ternary terbium composites SiO2(600)@Tb(MABA-Si)·L(L:dipy/phen) nanometre luminescence materials were prepared by ternary terbium complexes Tb(MABA-Si)·L2·(ClO4)3·2H2O shell grafted onto the surface of SiO2 microspheres. And corresponding ternary terbium complexes were synthesized using (CONH(CH2)3Si(OCH2CH3)3)2 (denoted as MABA-Si) as first ligand and L as second ligand coordinated with terbium perchlorate. The as-synthesized products were characterized by means of IR spectra, 1HNMR, element analysis, molar conductivity, SEM and TEM. It was found that the first ligand MABA-Si of terbium ternary complex hydrolysed to generate the Si-OH and the Si-OH condensate with the Si-OH on the surface of SiO2 microspheres; then ligand MABA-Si grafted onto the surface of SiO2 microspheres. The diameter of SiO2 core of SiO2(600)@Tb(MABA-Si)·L was approximately 600 nm. Interestingly, the luminescence properties demonstrate that the two core-shell structure ternary terbium composites SiO2(600)Tb(MABA-Si)·L(dipy/phen) exhibit strong emission intensities, which are 2.49 and 3.35 times higher than that of the corresponding complexes Tb(MABA-Si)·L2·(ClO4)3·2H2O, respectively. Luminescence decay curves show that core-shell structure ternary terbium composites have longer lifetime. Excellent luminescence properties enable the core-shell materials to have potential applications in medicine, industry, luminescent fibres and various biomaterials fields.
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Affiliation(s)
- Yang-Yang Ma
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Wen-Xian Li
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Yu-Shan Zheng
- Inner Mongolia Autonomous Region food inspection test center, Hohhot 010021, People's Republic of China
| | - Jin-Rong Bao
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Yi-Lian Li
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Li-Na Feng
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Kui-Suo Yang
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Yan Qiao
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - An-Ping Wu
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
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21
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Tan J, Li X, He J, Xu Q, Zhang Y, Dai X, Yu L, Zeng R, Zhang L. Carboxyl-Functionalized Polymeric Microspheres Prepared by One-Stage Photoinitiated RAFT Dispersion Polymerization. Polymers (Basel) 2017; 9:E681. [PMID: 30965981 PMCID: PMC6418837 DOI: 10.3390/polym9120681] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 12/04/2017] [Accepted: 12/04/2017] [Indexed: 11/16/2022] Open
Abstract
Herein, we report a photoinitiated reversible addition-fragmentation chain transfer (RAFT) dispersion copolymerization of methyl methacrylate (MMA) and methyl methacrylic (MAA) for the preparation of highly monodisperse carboxyl-functionalized polymeric microspheres. High rates of polymerization were observed, with more than 90% particle yields being achieved within 3 h of UV irradiation. Effects of reaction parameters (e.g., MAA concentration, RAFT agent concentration, photoinitiator concentration, and solvent composition) were studied in detail, and highly monodisperse polymeric microspheres were obtained in most cases. Finally, silver (Ag) composite microspheres were prepared by in situ reduction of AgNO₃ using the carboxyl-functionalized polymeric microspheres as the template. The obtained Ag composite microspheres were able to catalyze the reduction of methylene blue (MB) with NaBH₄ as a reductant.
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Affiliation(s)
- Jianbo Tan
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou 510006, China.
| | - Xueliang Li
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
| | - Jun He
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
| | - Qin Xu
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
| | - Yuxuan Zhang
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
| | - Xiaocong Dai
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
| | - Liangliang Yu
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
| | - Ruiming Zeng
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
| | - Li Zhang
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou 510006, China.
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22
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Research of the synthesis and film performance of silica/poly(St-BA-MPS) core-shell latexes obtained by miniemulsion co-polymerization. Macromol Res 2017. [DOI: 10.1007/s13233-017-5054-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Zou H, Wang X. Adsorption of Silica Nanoparticles onto Poly(N-vinylpyrrolidone)-Functionalized Polystyrene Latex. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1471-1477. [PMID: 28112949 DOI: 10.1021/acs.langmuir.6b03977] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This paper presents a more general method to prepare silica-coated polystyrene (PS) particles with minimal excess silica by adsorption, highlighting the role of poly(N-vinylpyrrolidone) (PVP). The method is based on the addition of small silica nanoparticles onto submicrometer-sized near-monodisperse polymer latex particles under the conditions of monolayer silica coverage of the latex surface. Either a cationic or an anionic initiator could be used in the PVP-involved emulsion polymerization to prepare PS particles, and the adsorption was conducted successfully either under acidic or basic conditions. Neither a cationic initiator nor a basic condition is a prerequisite for the adsorption process, which should be related to the much stronger interaction between PVP and the silica surface. This method is expected to substantially extend the adsorption conditions of polymer-silica colloidal nanocomposite syntheses.
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Affiliation(s)
- Hua Zou
- School of Materials Science and Engineering, University of Shanghai for Science and Technology , 516 Jungong Road, Shanghai 200093, China
| | - Xia Wang
- School of Materials Science and Engineering, University of Shanghai for Science and Technology , 516 Jungong Road, Shanghai 200093, China
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24
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Abstract
Unravelling the mechanism of Pickering emulsion polymerization using silica nanoparticles as the stabilizer.
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25
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Organic-Inorganic Hydrophobic Nanocomposite Film with a Core-Shell Structure. MATERIALS 2016; 9:ma9121021. [PMID: 28774141 PMCID: PMC5456958 DOI: 10.3390/ma9121021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 12/01/2016] [Accepted: 12/05/2016] [Indexed: 02/01/2023]
Abstract
A method to prepare novel organic-inorganic hydrophobic nanocomposite films was proposed by a site-specific polymerization process. The inorganic part, the core of the nanocomposite, is a ternary SiO2–Al2O3–TiO2 nanoparticles, which is grafted with methacryloxy propyl trimethoxyl silane (KH570), and wrapped by fluoride and siloxane polymers. The synthesized samples are characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectrscopy, X-ray diffractometry (XRD), contact angle meter (CA), and scanning electron microscope (SEM). The results indicate that the novel organic-inorganic hydrophobic nanocomposite with a core-shell structure was synthesized successfully. XRD analysis reveals the nanocomposite film has an amorphous structure, and FTIR analysis indicates the nanoparticles react with a silane coupling agent (methacryloxy propyl trimethoxyl silane KH570). Interestingly, the morphology of the nanoparticle film is influenced by the composition of the core. Further, comparing with the film synthesized by silica nanoparticles, the film formed from SiO2–Al2O3–TiO2 nanoparticles has higher hydrophobic performance, i.e., the contact angle is greater than 101.7°. In addition, the TEM analysis reveals that the crystal structure of the particles can be changed at high temperatures.
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26
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Akpinar B, Fielding LA, Cunningham VJ, Ning Y, Mykhaylyk OO, Fowler PW, Armes SP. Determining the Effective Density and Stabilizer Layer Thickness of Sterically Stabilized Nanoparticles. Macromolecules 2016; 49:5160-5171. [PMID: 27478250 PMCID: PMC4963924 DOI: 10.1021/acs.macromol.6b00987] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/27/2016] [Indexed: 01/27/2023]
Abstract
A series of model sterically stabilized diblock copolymer nanoparticles has been designed to aid the development of analytical protocols in order to determine two key parameters: the effective particle density and the steric stabilizer layer thickness. The former parameter is essential for high resolution particle size analysis based on analytical (ultra)centrifugation techniques (e.g., disk centrifuge photosedimentometry, DCP), whereas the latter parameter is of fundamental importance in determining the effectiveness of steric stabilization as a colloid stability mechanism. The diblock copolymer nanoparticles were prepared via polymerization-induced self-assembly (PISA) using RAFT aqueous emulsion polymerization: this approach affords relatively narrow particle size distributions and enables the mean particle diameter and the stabilizer layer thickness to be adjusted independently via systematic variation of the mean degree of polymerization of the hydrophobic and hydrophilic blocks, respectively. The hydrophobic core-forming block was poly(2,2,2-trifluoroethyl methacrylate) [PTFEMA], which was selected for its relatively high density. The hydrophilic stabilizer block was poly(glycerol monomethacrylate) [PGMA], which is a well-known non-ionic polymer that remains water-soluble over a wide range of temperatures. Four series of PGMA x -PTFEMA y nanoparticles were prepared (x = 28, 43, 63, and 98, y = 100-1400) and characterized via transmission electron microscopy (TEM), dynamic light scattering (DLS), and small-angle X-ray scattering (SAXS). It was found that the degree of polymerization of both the PGMA stabilizer and core-forming PTFEMA had a strong influence on the mean particle diameter, which ranged from 20 to 250 nm. Furthermore, SAXS was used to determine radii of gyration of 1.46 to 2.69 nm for the solvated PGMA stabilizer blocks. Thus, the mean effective density of these sterically stabilized particles was calculated and determined to lie between 1.19 g cm-3 for the smaller particles and 1.41 g cm-3 for the larger particles; these values are significantly lower than the solid-state density of PTFEMA (1.47 g cm-3). Since analytical centrifugation requires the density difference between the particles and the aqueous phase, determining the effective particle density is clearly vital for obtaining reliable particle size distributions. Furthermore, selected DCP data were recalculated by taking into account the inherent density distribution superimposed on the particle size distribution. Consequently, the true particle size distributions were found to be somewhat narrower than those calculated using an erroneous single density value, with smaller particles being particularly sensitive to this artifact.
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Affiliation(s)
- Bernice Akpinar
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - Lee A. Fielding
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
- School
of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Victoria J. Cunningham
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - Yin Ning
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - Oleksandr O. Mykhaylyk
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - Patrick W. Fowler
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - Steven P. Armes
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
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27
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Cordella D, Debuigne A, Jérôme C, Kochovski Z, Taton D, Detrembleur C. One-Pot Synthesis of Double Poly(Ionic Liquid) Block Copolymers by Cobalt-Mediated Radical Polymerization-Induced Self-Assembly (CMR-PISA) in Water. Macromol Rapid Commun 2016; 37:1181-7. [DOI: 10.1002/marc.201600039] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 02/25/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Daniela Cordella
- Center for Education and Research on Macromolecules (CERM); Chemistry Department; University of Liege (ULg); Sart-Tilman, B6a 4000 Liege Belgium
| | - Antoine Debuigne
- Center for Education and Research on Macromolecules (CERM); Chemistry Department; University of Liege (ULg); Sart-Tilman, B6a 4000 Liege Belgium
| | - Christine Jérôme
- Center for Education and Research on Macromolecules (CERM); Chemistry Department; University of Liege (ULg); Sart-Tilman, B6a 4000 Liege Belgium
| | - Zdravko Kochovski
- F-I2 Soft Matter and Functional Materials; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Daniel Taton
- Laboratoire de Chimie des Polymères Organiques (LCPO); IPB-ENSCBP; Université de Bordeaux; F-33607 Pessac Cedex France
| | - Christophe Detrembleur
- Center for Education and Research on Macromolecules (CERM); Chemistry Department; University of Liege (ULg); Sart-Tilman, B6a 4000 Liege Belgium
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28
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Mulyadi A, Zhang Z, Deng Y. Fluorine-Free Oil Absorbents Made from Cellulose Nanofibril Aerogels. ACS APPLIED MATERIALS & INTERFACES 2016; 8:2732-2740. [PMID: 26761377 DOI: 10.1021/acsami.5b10985] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Aerogels based on cellulose nanofibrils (CNFs) have been of great interest as absorbents due to their high absorption capacity, low density, biodegradability, and large surface area. Hydrophobic aerogels have been designed to give excellent oil absorption tendency from water. Herein, we present an in situ method for CNF surface modification and hydrophobic aerogel preparation. Neither solvent exchange nor fluorine chemical is used in aerogel preparations. The as-prepared hydrophobic aerogels exhibit low density (23.2 mg/cm(-3)), high porosity (98.5%), good flexibility, and solvent-induced shape recovery property. Successful surface modification was confirmed through field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and water contact angle measurements. The hydrophobic aerogels show high absorption capacities for various oils, depending on liquid density, up to 47× their original weight but with low water uptake (<0.5 g/g aerogel).
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Affiliation(s)
- Arie Mulyadi
- School of Chemical & Biomolecular Engineering, Renewable Bioproducts Institute, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Zhe Zhang
- School of Chemical & Biomolecular Engineering, Renewable Bioproducts Institute, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Yulin Deng
- School of Chemical & Biomolecular Engineering, Renewable Bioproducts Institute, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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29
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Behavior of adipic dihydrazide and silica in the preparation of acrylate redispersible polymer powders. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3568-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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30
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31
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Liao W, Huang X, Ye L, Lan S, Fan H, Qu J. Film-formation of polyacrylate/silica composite latexes by sol-gel process. J Appl Polym Sci 2015. [DOI: 10.1002/app.42417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Wenbo Liao
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Xiangxuan Huang
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Lingyun Ye
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Shanhong Lan
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Hongbo Fan
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Jinqing Qu
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 China
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32
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Yuan J, Qian H. The effect of octamethylcyclotetrasiloxane (D4) addition on the structure and properties of film-forming polyacrylate/silica core-shell composite particles. J Appl Polym Sci 2015. [DOI: 10.1002/app.42003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Junjie Yuan
- Key Laboratory of Advanced Civil Engineering Materials, School of Materials Science and Engineering; Tongji University; Shanghai People's Republic of China
| | - He Qian
- Key Laboratory of Advanced Civil Engineering Materials, School of Materials Science and Engineering; Tongji University; Shanghai People's Republic of China
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33
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One-pot synthesis of organic-inorganic hybrid hollow latex particles via Pickering and seeded emulsion polymerizations. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3522-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Yang W, Zhu L, Chen Y. One-step fabrication of 3-methacryloxypropyltrimethoxysilane modified silica and investigation of fluorinated polyacrylate/silica nanocomposite films. RSC Adv 2015. [DOI: 10.1039/c5ra10535h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
One-step synthesis of MPS-functionalized silica and preparation of film forming fluorinated polyacrylate/silica nanocomposite particles.
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Affiliation(s)
- Wei Yang
- School of Material Science and Engineering
- Beihang University
- Beijing 100191
- China
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
| | - Liqun Zhu
- School of Material Science and Engineering
- Beihang University
- Beijing 100191
- China
| | - Yichi Chen
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
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35
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Ji J, Shu S, Wang F, Li Z, Liu J, Song Y, Jia Y. Core-shell-structured silica/polyacrylate particles prepared by Pickering emulsion: influence of the nucleation model on particle interfacial organization and emulsion stability. NANOSCALE RESEARCH LETTERS 2014; 9:534. [PMID: 25313299 PMCID: PMC4194059 DOI: 10.1186/1556-276x-9-534] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 09/20/2014] [Indexed: 06/04/2023]
Abstract
This work reports a new evidence of the versatility of silica sol as a stabilizer for Pickering emulsions. The organization of silica particles at the oil-water interface is a function of the nucleation model. The present results show that nucleation model, together with monomer hydrophobicity, can be used as a trigger to modify the packing density of silica particles at the oil-water interface: Less hydrophobic methylmethacrylate, more wettable with silica particles, favors the formation of core-shell-structured composite when the composite particles are prepared by miniemulsion polymerization in which monomers are fed in batch (droplet nucleation). By contrast, hydrophobic butylacrylate promotes the encapsulating efficiency of silica when monomers are fed dropwise (homogeneous nucleation). The morphologies of polyacrylate-nano-SiO2 composites prepared from different feed ratio of methylmethacrylate/butylacrylate (with different hydrophobicity) and by different feed processes are characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM) techniques. The results from SEM and TEM show that the morphologies of the as-prepared polyacrylate/nano-SiO2 composite can be a core-shell structure or a bare acrylic sphere. The stability of resulting emulsions composed of these composite particles is strongly dependent on the surface coverage of silica particles. The emulsion stability is improved by densely silica-packed composite particles.
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Affiliation(s)
- Jing Ji
- Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Shi Shu
- Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Feng Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhilin Li
- Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jingjun Liu
- Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Ye Song
- Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yi Jia
- Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
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36
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Mehlhase S, Schäfer CG, Morsbach J, Schmidt L, Klein R, Frey H, Gallei M. Vinylphenylglycidyl ether-based colloidal architectures: high-functionality crosslinking reagents, hybrid raspberry-type particles and smart hydrophobic surfaces. RSC Adv 2014. [DOI: 10.1039/c4ra08382b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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37
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Fielding LA, Armes SP, Staniland P, Sayer R, Tooley I. Physical adsorption of anisotropic titania nanoparticles onto poly(2-vinylpyridine) latex and characterisation of the resulting nanocomposite particles. J Colloid Interface Sci 2014; 426:170-80. [PMID: 24863780 DOI: 10.1016/j.jcis.2014.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 03/27/2014] [Accepted: 04/01/2014] [Indexed: 10/25/2022]
Abstract
Four poly(2-vinylpyridine) latexes with intensity-average mean diameters ranging between 246 and 955nm were prepared by aqueous emulsion polymerisation. These latexes were characterised by transmission electron microscopy, field emission scanning electron microscopy, dynamic light scattering, aqueous electrophoresis, disc centrifuge photosedimentometry and thermogravimetry. The adsorption of rice grain-shaped nano-sized titania particles onto the surface of these latex particles from aqueous solution was investigated. It was found that the titania particles adsorb strongly at pH 10 and the optimal loading and packing density of titania was investigated for each latex. The resulting core-shell P2VP-titania nanocomposite particles were characterised in terms of their titania contents, surface coverages and colloidal stabilities. UV-Vis spectra were recorded for the titania nanoparticles, the original P2VP latexes and the poly(2-vinylpyridine)-titania nanocomposite particles. It was found that, for the larger nanocomposite particles, UV-Vis absorption was dominated by the latex core, whereas the smaller P2VP-titania nanocomposite particles exhibited UV attenuation to longer wavelengths compared to both the bare latex and the titania particles. The poly(2-vinylpyridine) cores were selectively removed by calcination of the nanocomposite particles and the resulting hollow titania structures were investigated by transmission electron microscopy.
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Affiliation(s)
- Lee A Fielding
- Dainton Building, Department of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, UK.
| | - Steven P Armes
- Dainton Building, Department of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, UK
| | - Paul Staniland
- Croda Europe Ltd., Foundry Lane, Ditton, Widnes, Cheshire WA8 8UB, UK
| | - Robert Sayer
- Croda Europe Ltd., Foundry Lane, Ditton, Widnes, Cheshire WA8 8UB, UK
| | - Ian Tooley
- Croda Europe Ltd., Foundry Lane, Ditton, Widnes, Cheshire WA8 8UB, UK
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38
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Haaj SB, Thielemans W, Magnin A, Boufi S. Starch nanocrystal stabilized Pickering emulsion polymerization for nanocomposites with improved performance. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8263-8273. [PMID: 24871664 DOI: 10.1021/am501077e] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Latex/starch nanocrystal (SNC) nanocomposite dispersions were successfully synthesized via a one-step surfactant-free Pickering emulsion polymerization route using SNC as the sole stabilizer. The effect of the SNC content, initiator type and comonomer on the particle size, colloidal stability, and film properties were investigated. Both HCl and H2SO4-hydrolysed starch nanocrystals, each bearing different surface charges, were used as Pickering emulsion stabilizing nanoparticles. SNCs from HCl hydrolysis were found to provide a better stabilization effect, giving rise to a polymer dispersion with a lower average particle size. The mechanistic aspects of the Pickering emulsion polymerization were also discussed. Nanocomposites formed by film-casting the polymer Pickering emulsions showed better mechanical properties and optical transparency than those obtained by blending the polymer emulsion with a nanocrystal dispersion, showing the one-pot route to nanocomposite precursors to be doubly advantageous. Therefore, this in situ polymerization technique not only facilitates the use of SNC nanoparticles, it also provides a valuable nanocomposite with enhanced mechanical properties and high transparency level.
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Affiliation(s)
- Sihem Bel Haaj
- Sfax Faculty of Science-LMSE, University of Sfax , BP 802, 3018 Sfax, Tunisia
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39
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Ribeiro T, Baleizão C, Farinha JPS. Functional Films from Silica/Polymer Nanoparticles. MATERIALS 2014; 7:3881-3900. [PMID: 28788655 PMCID: PMC5453198 DOI: 10.3390/ma7053881] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 05/07/2014] [Accepted: 05/07/2014] [Indexed: 02/03/2023]
Abstract
High performance functional coatings, based on hybrid organic/inorganic materials, are being developed to combine the polymer flexibility and ease of processing with the mechanical properties and versatility of inorganic materials. By incorporating silica nanoparticles (SiNPs) in the polymeric matrices, it is possible to obtain hybrid polymer films with increased tensile strength and impact resistance, without decreasing the flexural properties of the polymer matrix. The SiNPs can further be used as carriers to impart other functionalities (optical, etc.) to the hybrid films. By using polymer-coated SiNPs, it is possible to reduce particle aggregation in the films and, thus, achieve more homogeneous distributions of the inorganic components and, therefore, better properties. On the other hand, by coating polymer particles with silica, one can create hierarchically structured materials, for example to obtain superhydrophobic coatings. In this review, we will cover the latest developments in films prepared from hybrid polymer/silica functional systems.
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Affiliation(s)
- Tânia Ribeiro
- CQFM-Centro de Química-Física Molecular and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - Carlos Baleizão
- CQFM-Centro de Química-Física Molecular and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - José Paulo S Farinha
- CQFM-Centro de Química-Física Molecular and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
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40
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Haaj SB, Magnin A, Boufi S. Starch nanoparticles produced via ultrasonication as a sustainable stabilizer in Pickering emulsion polymerization. RSC Adv 2014. [DOI: 10.1039/c4ra06194b] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
A facile and effective method for the Pickering emulsion polymerization of acrylate monomer is reported, using SNPs as the sole stabilizer. The SNPs were produced via ultrasonication in water without any chemical additives.
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Affiliation(s)
| | - Albert Magnin
- Laboratoire Rhéologie et Procédés
- Univ. Grenoble Alpes
- LRP
- Grenoble, France
| | - Sami Boufi
- University of Sfax-Sfax Faculty of Science
- Sfax, Tunisia
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41
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Liu B, Huang S, Xu Z, Gao F, Zhu J. Synthesis and properties of hybrid core–shell poly(alkyltrialkoxysiloxane) latex. NEW J CHEM 2014. [DOI: 10.1039/c4nj00853g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We discuss the nucleation mechanism and process of hybrid core–shell poly(alkyltrialkoxysiloxane) latex particles’ formation.
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Affiliation(s)
- Bo Liu
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials
- Hubei University
- Wuhan 430062, P.R. China
| | - Shiqiang Huang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials
- Hubei University
- Wuhan 430062, P.R. China
| | - Zushun Xu
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials
- Hubei University
- Wuhan 430062, P.R. China
| | - Feng Gao
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials
- Hubei University
- Wuhan 430062, P.R. China
| | - Jie Zhu
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials
- Hubei University
- Wuhan 430062, P.R. China
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Fan X, Jia X, Zhang H, Zhang B, Li C, Zhang Q. Synthesis of raspberry-like poly(styrene-glycidyl methacrylate) particles via a one-step soap-free emulsion polymerization process accompanied by phase separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:11730-11741. [PMID: 23941535 DOI: 10.1021/la402759w] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We herein report a facile method to prepare raspberry-like poly(styrene-glycidyl methacrylate) [P(S-GMA)] particles with controllable structure via a one-step soap-free emulsion polymerization process accompanied by phase separation. In this method, corona particles with a size of 10-20 nm were produced in situ in the later polymerization stage by the migrating of S-enriched polymers from GMA-enriched core particles. The size of the corona particles and the roughness of the raspberry-like particles can be easily controlled by adjusting the amount of styrene (S), glycidyl methacrylate (GMA), and divinylbenzene (DVB). The structure of raspberry-like P(S-GMA) particles was confirmed by transmission electron microscopy, scanning electron microscopy, and atomic force microscopy. A possible mechanism of the formation of raspberry-like particles was proposed.
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Affiliation(s)
- Xinlong Fan
- Department of Applied Chemistry, School of Science, Northwestern Polytechnical University , Number 127, West Youyi Road, Xi'an 710072, Shaanxi, People's Republic of China
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Yang S, Song C, Qiu T, Guo L, Li X. Synthesis of polystyrene/polysilsesquioxane core/shell composite particles via emulsion polymerization in the existence of poly(γ-methacryloxypropyl trimethoxysilane) sol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:92-101. [PMID: 23231420 DOI: 10.1021/la303813q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Here, we synthesized the polystyrene/polysilsesquioxane (PS/PSQ) core/shell latex particles via emulsion polymerization, which behave as an amusing morphology. First, the nanosized PSQ particles were prepared by the hydrolysis-condensation reaction of γ-methacryloxypropyl trimethoxysilane (MPTS) in ethanol medium. Subsequently, the as-obtained methacryloxypropylene functionalized PSQ (PMPTS) sol was directly added into the emulsion system of styrene (St) monomer, and PS/PSQ composite particles with core/shell structure were obtained through emulsion polymerization. We found that the structure of the composite particles can be affected by the synthesis parameters such as reaction time, content of PMPTS added in the reaction, amount of coemulsifier, and the pH value of emulsion system, which were systemically explored by transmission electron microscopy (TEM), scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), and thermogravimetric analysis (TGA) in this work. These results indicate that the PMPTS particles in the size of about 5 nm could first absorb onto the surface of PS latex particles so as to assemble in a strawberry-like morphology. The further coalescence among the PMPTS particles would result in a continuous PMPTS shell around the PS core. Moreover, the hollow PSQ capsules were prepared after extraction of the PS core by organic solvent, further confirming the core/shell structure of the as-synthesized PS/PMPTS particles. Meanwhile, we also explored the application of the PS/PSQ core/shell particles as a new kind of Pickering emulsifier in the emulsion polymerization of St, and composite particles with complex patchy morphologies have been obtained finally under different ratios of styrene monomer to PS/PMPTS colloidal emulsifier.
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Affiliation(s)
- Shenglin Yang
- College of Material Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, PR China
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Yang L, Zhou S, Gu G, Wu L. Film-forming behavior and mechanical properties of colloidal silica/polymer latex blends with high silica load. J Appl Polym Sci 2012. [DOI: 10.1002/app.38827] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kamiti M, Boldridge D, Ndoping LM, Remsen EE. Simultaneous absolute determination of particle size and effective density of submicron colloids by disc centrifuge photosedimentometry. Anal Chem 2012; 84:10526-30. [PMID: 23157599 DOI: 10.1021/ac3022086] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Disc centrifuge photosedimentometry (DCP) with fluids of different densities is used to simultaneously determine the particle size and effective density of spherical silica particles. Incorporation of a calibrated infrared pyrometer into a DCP instrument is shown to enhance the measurement capability of the DCP technique by correcting for the temperature dependence of the spin fluid's density and viscosity. Advantages of absolute DCP determinations for size and density analysis relative to standardized DCP measurements include the elimination of instrument standardization with a particle of known density and measurements or estimation of the effective particle density. The reliability of diameter determinations provided by absolute DCP was confirmed using silica particles with nominal diameters ranging from 250 to 700 nm by comparison of these analyses with a diameter determination by transmission electron microscopy for silica particle size standards. Effective densities determined by absolute DCP for the silica particles ranged from 2.02 to 2.34 g/cm(3). These findings indicate that the silica particles have little or no porosity. The reported characterization of colloidal silica using absolute DCP suggests applicability of the technique to a variety of particle types including colloidal materials other than silica, core-shell particles, compositionally heterogeneous mixtures of nanoparticles, and irregularly shaped, structured colloids.
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Affiliation(s)
- Mungai Kamiti
- Cabot Microelectronics Corporation, 870 North Commons Drive, Aurora, Illinois 60504, USA
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Functionally modified monodisperse core–shell silica nanoparticles: Silane coupling agent as capping and size tuning agent. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.06.047] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Zgheib N, Putaux JL, Thill A, D'Agosto F, Lansalot M, Bourgeat-Lami E. Stabilization of miniemulsion droplets by cerium oxide nanoparticles: a step toward the elaboration of armored composite latexes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6163-6174. [PMID: 22416940 DOI: 10.1021/la300494g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Stable methyl methacrylate (MMA) miniemulsions were successfully prepared using for the first time cerium oxide (CeO(2)) nanoparticles as solid stabilizers in the absence of any molecular surfactant. The interaction between MMA droplets and CeO(2) nanoparticles was induced by the use of methacrylic acid (MAA) as a comonomer. Both MAA and CeO(2) contents played a key role on the diameter and the stability of the droplets formed during the emulsification step. Cryo-transmission electron microscopy (TEM) images of the suspensions formed with 35 wt % of CeO(2) showed the presence of polydisperse 50-150 nm spherical droplets. More surprisingly, some nonspherical (likely discoidal) objects that could be the result of the sonication step were also observed. The subsequent polymerization of these Pickering miniemulsion droplets led to the formation of composite PMMA latex particles armored with CeO(2). In all cases, the conversion was limited to ca. 85%, concomitant with a loss of stability of the latex for CeO(2) contents lower than 35 wt %. This stability issues were likely related to the screening of the cationic charges present on CeO(2) nanoparticles upon polymerization. TEM images showed mostly spherical particles with a diameter ranging from 100 to 400 nm and homogeneously covered with CeO(2). Besides, for particles typically larger than 200 nm, a buckled morphology was observed supporting the presence of residual monomer at the end of the polymerization and consistent with the limited conversion. The versatility of these systems was further demonstrated using 35 wt % of CeO(2) and replacing MMA by n-butyl acrylate (BA) either alone or in combination with MMA. Stable monomer emulsions were always obtained, with the droplet size increasing with the hydrophobicity of the oil phase, pointing out the key influence of the wettability of the solid stabilizer. The polymerization of Pickering miniemulsion stabilized by CeO(2) nanoparticles proved to be an efficient strategy to form armored composite latex particles which may find applications in coating technology.
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Affiliation(s)
- Nancy Zgheib
- Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS UMR5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), LCPP team, 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
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Fielding LA, Mykhaylyk OO, Armes SP, Fowler PW, Mittal V, Fitzpatrick S. Correcting for a density distribution: particle size analysis of core-shell nanocomposite particles using disk centrifuge photosedimentometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:2536-2544. [PMID: 22214311 DOI: 10.1021/la204841n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Many types of colloidal particles possess a core-shell morphology. In this Article, we show that, if the core and shell densities differ, this morphology leads to an inherent density distribution for particles of finite polydispersity. If the shell is denser than the core, this density distribution implies an artificial narrowing of the particle size distribution as determined by disk centrifuge photosedimentometry (DCP). In the specific case of polystyrene/silica nanocomposite particles, which consist of a polystyrene core coated with a monolayer shell of silica nanoparticles, we demonstrate that the particle density distribution can be determined by analytical ultracentrifugation and introduce a mathematical method to account for this density distribution by reanalyzing the raw DCP data. Using the mean silica packing density calculated from small-angle X-ray scattering, the real particle density can be calculated for each data point. The corrected DCP particle size distribution is both broader and more consistent with particle size distributions reported for the same polystyrene/silica nanocomposite sample using other sizing techniques, such as electron microscopy, laser light diffraction, and dynamic light scattering. Artifactual narrowing of the size distribution is also likely to occur for many other polymer/inorganic nanocomposite particles comprising a low-density core of variable dimensions coated with a high-density shell of constant thickness, or for core-shell latexes where the shell is continuous rather than particulate in nature.
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Affiliation(s)
- Lee A Fielding
- Dainton Building, Department of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
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Fielding LA, Armes SP. Preparation of Pickering emulsions and colloidosomes using either a glycerol-functionalised silica sol or core–shell polymer/silica nanocomposite particles. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31433a] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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