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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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2
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Li S, Opdam J, G J van der Ven L, Tuinier R, Catarina C Esteves A. What is the role of PEO chains in the assembly of core-corona supraparticles in aqueous dispersions? J Colloid Interface Sci 2023; 646:461-471. [PMID: 37207427 DOI: 10.1016/j.jcis.2023.05.044] [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: 02/21/2023] [Revised: 04/24/2023] [Accepted: 05/06/2023] [Indexed: 05/21/2023]
Abstract
Hypothesis The assembly of core-corona supraparticles in aqueous dispersions has been regularly assisted by auxiliary monomers/oligomers which modify the individual particles with, e.g., surface grafting of polyethylene oxide (PEO) chains or other hydrophilic monomers. However, this modification complicates the preparation and purification procedures and increases potential upscaling efforts. Hybrid polymer-silica core-corona supracolloids could be more simply assembled if the PEO chains from surfactants, typically used by default as polymer stabilizers, concomitantly act as assembly promotors. The supracolloids assembly could therefore be more easily achieved without requiring particles functionalization or post-purification steps. Methods The self-assembly of supracolloidal particles prepared with PEO-surfactant stabilized (Triton X-405) and/or PEO-grafted polymer particles is compared to differentiate the roles of the PEO chains in the assembly of core-corona supraparticles. Using time-resolved dynamic light scattering (DLS) and cryogenic transmission electron microscopy(cryo-TEM), the effect of concentration of PEO chains (from surfactant) on the kinetics and dynamics of supracolloids assembly is investigated. Self-consistent field (SCF) lattice theory was used to numerically study the distribution of PEO chains at the interfaces present in the supracolloidal dispersions. Findings The PEO based surfactant can be used as assembly promoter of core-corona hybrid supracolloids due to its amphiphilic nature and via establishing hydrophobic interactions. The concentration of the PEO surfactant, and especially the PEO chains distribution over the different interfaces, crucially affect the supracolloids assembly. A simplified pathway for preparing hybrid supracolloidal particles with a well-controlled corona coverage over polymer cores is presented.
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Affiliation(s)
- Siyu Li
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands
| | - Joeri Opdam
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands
| | - Leendert G J van der Ven
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands
| | - Remco Tuinier
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands
| | - A Catarina C Esteves
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands.
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3
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Li S, van der Ven LGJ, Spoelstra AB, Tuinier R, Esteves ACC. Tunable distribution of silica nanoparticles in water-borne coatings via strawberry supracolloidal dispersions. J Colloid Interface Sci 2023; 646:185-197. [PMID: 37196492 DOI: 10.1016/j.jcis.2023.04.154] [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: 03/22/2023] [Revised: 04/21/2023] [Accepted: 04/27/2023] [Indexed: 05/19/2023]
Abstract
HYPOTHESIS Water-borne coatings are rapidly expanding as sustainable alternatives to organic solvent-borne systems. Inorganic colloids are often added to aqueous polymer dispersions to enhance the performance of water-borne coatings. However, these bimodal dispersions have many interfaces which can result in unstable colloids and undesirable phase separation. The covalent bonding between individual colloids, on a polymer-inorganic core-corona supracolloidal assembly, could reduce or suppress instability and phase separation during drying of coatings, advancing its mechanical and optical properties. METHODS Aqueous polymer-silica supracolloids with a core-corona strawberry configuration were used to precisely control the silica nanoparticles distribution within the coating. The interaction between polymer and silica particles was fine-tuned to obtain covalently bound or physically adsorbed supracolloids. Coatings were prepared by drying the supracolloidal dispersions at room temperature, and their morphology and mechanical properties were interconnected. FINDINGS Covalently bound supracolloids provided transparent coatings with a homogeneous 3D percolating silica nanonetwork. Supracolloids having physical adsorption only, resulted in coatings with a stratified silica layer at interfaces. The well-arranged silica nanonetworks strongly improve the storage moduli and water resistance of the coatings. These supracolloidal dispersions offer a new paradigm for preparing water-borne coatings with enhanced mechanical properties and other functionalities, like structural color.
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Affiliation(s)
- Siyu Li
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Leendert G J van der Ven
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Anne B Spoelstra
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Center for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Remco Tuinier
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - A Catarina C Esteves
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
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4
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Swift T. Stabilisation of acrylic latexes containing silica nanoparticles for dirt repellent coating applications. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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5
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Tong Y, Feng M, Liu Y, Li H, Wang Q. Preparation and oil absorption performance of ATP/P(MMA-BMA-St)/Fe. Aust J Chem 2022. [DOI: 10.1071/ch22092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this paper, oil-in-water-in-oil (O/W/O) double Pickering emulsions were prepared by purified and modified attapulgite (ATP), and modified nano-Fe3O4 as stable particles. By using the Pickering emulsion as a template and using methyl methacrylate (MMA), butyl methacrylate ester (BMA) and styrene (St) as monomers, ATP/P(MMA-BMA-St)/Fe3O4 composite porous resins were then prepared. The oil absorption performance of the composites was investigated. The results showed that the composite materials prepared by the double Pickering emulsion template method exhibited a three-dimensional (3D) porous structure. When using the optimal conditions (mMMA:mBMA = 3:2, m(MMA+BMA):mSt = 1:2, initiator = 5.33%, crosslinking agent = 20%, modified attapulgite = 0.33% and oil phase/water phase = 1:4), the prepared porous material had the best oil absorption performance, resulting in a diesel oil absorption rate and oil retention rate of 897.29 and 84.76% respectively. This study provides a simple, economic and environmentally friendly method for the preparation of inorganic–organic composite porous materials, which has great application potential in the field of oil treatment.
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6
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Assembly of partially covered strawberry supracolloids in dilute and concentrate aqueous dispersions. J Colloid Interface Sci 2022; 627:827-837. [PMID: 35901562 DOI: 10.1016/j.jcis.2022.06.179] [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: 05/10/2022] [Revised: 06/25/2022] [Accepted: 06/30/2022] [Indexed: 11/20/2022]
Abstract
HYPOTHESIS Core-corona supracolloids can be assembled in aqueous dispersions by controlling the physical interactions between the corona and core colloidal particles. A raspberry corona configuration with full surface coverage of the core can be reached by inducing strong attractive interactions between the individual particles. A controlled partial surface coverage of the core, i.e. strawberry configuration, is however, more difficult to achieve. Supracolloids with different surface coverage ratio exhibit unique and multifunctional surface properties. EXPERIMENTS By counterbalancing the multiple physical interactions playing a role during the assembly, the configuration and stability of the assemblies could be fine-tuned over a wide range of concentrations. Supracolloids consisting of polyethylene glycol (PEO)-grafted polymer particles covered by silica nanoparticles were assembled with different configurations, by adjusting the pH and ionic strength of the dispersion, the PEO grafting density and the particles concentration. The self-assembly process and resulting configurations were monitored via cryogenic transmission electron microscopy (Cryo-TEM) and light scattering. FINDINGS The suitable conditions to assemble supracolloids with partial corona coverage have been established. Stable strawberry supracolloids could be prepared, both for diluted (1 wt%) and concentrated (12 wt%) dispersions. These hybrid supracolloids with well-defined configuration are highly relevant to developing advanced water-borne paints and inks, food dispersions, cosmetic and healthcare products.
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7
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Tong YC, wang QY, Feng M, He QL, Liu Y. Preparing an ATP/P (n‐BuMA‐St)/Fe3O4 Oil‐Absorbing Resin Composite via a Double Pickering Emulsion Template Method and Elucidating of Its Properties. Chempluschem 2022; 87:e202200100. [DOI: 10.1002/cplu.202200100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/14/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Yong Chun Tong
- Hexi University College of Chemistry and Chemical Engineering CHINA
| | - qing-yun wang
- Hexi University College of Chemistry and Chemical Engineering Ganzhou district No. 846, Zhangye 734000, China 734000 zhangye CHINA
| | - Min Feng
- Hexi University College of Chemistry and Chemical Engineering CHINA
| | - Qiao Ling He
- Hexi University College of Chemistry and Chemical Engineering CHINA
| | - Yun Liu
- Hexi University College of Chemistry and Chemical Engineering CHINA
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8
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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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9
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Chan DH, Kynaston EL, Lindsay C, Taylor P, Armes SP. Block Copolymer Nanoparticles are Effective Dispersants for Micrometer-Sized Organic Crystalline Particles. ACS APPLIED MATERIALS & INTERFACES 2021; 13:30235-30243. [PMID: 34151553 PMCID: PMC8289232 DOI: 10.1021/acsami.1c08261] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 06/09/2021] [Indexed: 05/08/2023]
Abstract
Well-defined sterically stabilized diblock copolymer nanoparticles of 29 nm diameter are prepared by RAFT aqueous emulsion polymerization of methyl methacrylate using a dithiobenzoate-capped poly(glycerol monomethacrylate) precursor. These nanoparticles are evaluated as a dispersant for the preparation of organic crystalline microparticles via ball milling. This is exemplified for azoxystrobin, which is a broad-spectrum fungicide that is widely used to protect various food crops. Laser diffraction and optical microscopy studies indicate the formation of azoxystrobin microparticles of approximately 2 μm diameter after ball milling for 10 min at 400 rpm. Nanoparticle adsorption at the surface of these azoxystrobin microparticles is confirmed by electron microscopy studies. The extent of nanoparticle adsorption on the azoxystrobin microparticles can be quantified using a supernatant assay based on solution densitometry. This technique indicates an adsorbed amount of approximately 5.5 mg m-2, which is sufficient to significantly reduce the negative zeta potential exhibited by azoxystrobin. Moreover, this adsorbed amount appears to be essentially independent of the nature of the core-forming block, with similar data being obtained for both poly(methyl methacrylate)- and poly(2,2,2-trifluoroethyl methacrylate)-based nanoparticles. Finally, X-ray photoelectron spectroscopy studies confirm attenuation of the underlying N1s signal arising from the azoxystrobin microparticles by the former adsorbed nanoparticles, suggesting a fractional surface coverage of approximately 0.24. This value is consistent with a theoretical surface coverage of 0.25 calculated from the adsorption isotherm data. Overall, this study suggests that sterically stabilized diblock copolymer nanoparticles may offer a useful alternative approach to traditional soluble copolymer dispersants for the preparation of suspension concentrates affecting the context of agrochemical applications.
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Affiliation(s)
- Derek
H. H. Chan
- Dainton
Building, Department of Chemistry, University
of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, U.K.
| | - Emily L. Kynaston
- Syngenta,
Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K.
| | - Christopher Lindsay
- Syngenta,
Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K.
| | - Philip Taylor
- Syngenta,
Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K.
| | - Steven P. Armes
- Dainton
Building, Department of Chemistry, University
of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, U.K.
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10
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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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11
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Mable CJ, Fielding LA, Derry MJ, Mykhaylyk OO, Chambon P, Armes SP. Synthesis and pH-responsive dissociation of framboidal ABC triblock copolymer vesicles in aqueous solution. Chem Sci 2018; 9:1454-1463. [PMID: 29675191 PMCID: PMC5885938 DOI: 10.1039/c7sc04788f] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 12/12/2017] [Indexed: 11/21/2022] Open
Abstract
A series of pH-responsive all-methacrylic ABC triblock copolymer vesicles were prepared from precursor diblock copolymer vesicles via RAFT seeded emulsion polymerisation. Microphase separation between the two hydrophobic membrane-forming B and C blocks produced a distinctive framboidal morphology, for which the mean globule size can be tuned by adjusting the triblock copolymer composition. These vesicles remain intact at neutral pH, but undergo irreversible dissociation on addition of acid as a result of protonation of the tertiary amine groups located within the third block. Small-angle X-ray scattering (SAXS) was utilised to characterise the morphologies formed at pH 8 and pH 3. According to time-resolved SAXS studies, the acid-induced dissociation of these pH-responsive framboidal vesicles involves appreciable membrane swelling within 50 ms and is complete.
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Affiliation(s)
- C J Mable
- Department of Chemistry , Uni. of Sheffield , Dainton Building, Brook Hill , Sheffield , South Yorkshire S3 7HF , UK . ; Tel: +44 (0)114 222 9342
| | - L A Fielding
- School of Materials , Uni. of Manchester , Oxford Rd , Manchester , M13 9PL , UK
| | - M J Derry
- Department of Chemistry , Uni. of Sheffield , Dainton Building, Brook Hill , Sheffield , South Yorkshire S3 7HF , UK . ; Tel: +44 (0)114 222 9342
| | - O O Mykhaylyk
- Department of Chemistry , Uni. of Sheffield , Dainton Building, Brook Hill , Sheffield , South Yorkshire S3 7HF , UK . ; Tel: +44 (0)114 222 9342
| | - P Chambon
- Department of Chemistry , Uni. of Liverpool , Crown Street , Liverpool , L69 7ZD , UK
| | - S P Armes
- Department of Chemistry , Uni. of Sheffield , Dainton Building, Brook Hill , Sheffield , South Yorkshire S3 7HF , UK . ; Tel: +44 (0)114 222 9342
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12
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The synthesis of hydrophilic molecularly imprinted polymer microspheres and their application for selective removal of bisphenol A from water. REACT FUNCT POLYM 2017. [DOI: 10.1016/j.reactfunctpolym.2017.04.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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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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14
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North SM, Jones ER, Smith GN, Mykhaylyk OO, Annable T, Armes SP. Adsorption of Small Cationic Nanoparticles onto Large Anionic Particles from Aqueous Solution: A Model System for Understanding Pigment Dispersion and the Problem of Effective Particle Density. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1275-1284. [PMID: 28075595 PMCID: PMC5299546 DOI: 10.1021/acs.langmuir.6b04541] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 01/11/2017] [Indexed: 05/24/2023]
Abstract
The present study focuses on the use of copolymer nanoparticles as a dispersant for a model pigment (silica). Reversible addition-fragmentation chain transfer (RAFT) alcoholic dispersion polymerization was used to synthesize sterically stabilized diblock copolymer nanoparticles. The steric stabilizer block was poly(2-(dimethylamino)ethyl methacrylate) (PDMA) and the core-forming block was poly(benzyl methacrylate) (PBzMA). The mean degrees of polymerization for the PDMA and PBzMA blocks were 71 and 100, respectively. Transmission electron microscopy (TEM) studies confirmed a near-monodisperse spherical morphology, while dynamic light scattering (DLS) studies indicated an intensity-average diameter of 30 nm. Small-angle X-ray scattering (SAXS) reported a volume-average diameter of 29 ± 0.5 nm and a mean aggregation number of 154. Aqueous electrophoresis measurements confirmed that these PDMA71-PBzMA100 nanoparticles acquired cationic character when transferred from ethanol to water as a result of protonation of the weakly basic PDMA chains. Electrostatic adsorption of these nanoparticles from aqueous solution onto 470 nm silica particles led to either flocculation at submonolayer coverage or steric stabilization at or above monolayer coverage, as judged by DLS. This technique indicated that saturation coverage was achieved on addition of approximately 465 copolymer nanoparticles per silica particle, which corresponds to a fractional surface coverage of around 0.42. These adsorption data were corroborated using thermogravimetry, UV spectroscopy and X-ray photoelectron spectroscopy. TEM studies indicated that the cationic nanoparticles remained intact on the silica surface after electrostatic adsorption, while aqueous electrophoresis confirmed that surface charge reversal occurred below pH 7. The relatively thick layer of adsorbed nanoparticles led to a significant reduction in the effective particle density of the silica particles from 1.99 g cm-3 to approximately 1.74 g cm-3, as judged by disk centrifuge photosedimentometry (DCP). Combining the DCP and SAXS data suggests that essentially no deformation of the PBzMA cores occurs during nanoparticle adsorption onto the silica particles.
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Affiliation(s)
- S. M. North
- Department
of Chemistry, University of Sheffield, Dainton Building, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - E. R. Jones
- Department
of Chemistry, University of Sheffield, Dainton Building, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - G. N. Smith
- Department
of Chemistry, University of Sheffield, Dainton Building, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - O. O. Mykhaylyk
- Department
of Chemistry, University of Sheffield, Dainton Building, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - T. Annable
- Lubrizol
Limited, Hexagon Tower, P.O. Box 42, Blackley, Manchester M9
8ZS, U.K.
| | - S. P. Armes
- Department
of Chemistry, University of Sheffield, Dainton Building, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
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15
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Abstract
Unravelling the mechanism of Pickering emulsion polymerization using silica nanoparticles as the stabilizer.
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16
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Xing Y, Peng J, Xu K, Lin W, Gao S, Ren Y, Gui X, Liang S, Chen M. Polymerizable Molecular Silsesquioxane Cage Armored Hybrid Microcapsules with In Situ Shell Functionalization. Chemistry 2016; 22:2114-2126. [DOI: 10.1002/chem.201504473] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Indexed: 01/10/2023]
Affiliation(s)
- Yuxiu Xing
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O. Box 1122 Guangzhou 510650 China
- University of the Chinese Academy of Sciences; Beijing 100049 China
| | - Jun Peng
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O. Box 1122 Guangzhou 510650 China
- University of the Chinese Academy of Sciences; Beijing 100049 China
| | - Kai Xu
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O. Box 1122 Guangzhou 510650 China
| | - Weihong Lin
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O. Box 1122 Guangzhou 510650 China
- University of the Chinese Academy of Sciences; Beijing 100049 China
| | - Shuxi Gao
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O. Box 1122 Guangzhou 510650 China
- University of the Chinese Academy of Sciences; Beijing 100049 China
| | - Yuanyuan Ren
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O. Box 1122 Guangzhou 510650 China
- University of the Chinese Academy of Sciences; Beijing 100049 China
| | - Xuefeng Gui
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O. Box 1122 Guangzhou 510650 China
- University of the Chinese Academy of Sciences; Beijing 100049 China
| | - Shengyuan Liang
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O. Box 1122 Guangzhou 510650 China
- University of the Chinese Academy of Sciences; Beijing 100049 China
| | - Mingcai Chen
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O. Box 1122 Guangzhou 510650 China
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17
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Tagliazucchi M, Szleifer I. Dynamics of dissipative self-assembly of particles interacting through oscillatory forces. Faraday Discuss 2016; 186:399-418. [DOI: 10.1039/c5fd00115c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dissipative self-assembly is the formation of ordered structures far from equilibrium, which continuously uptake energy and dissipate it into the environment. Due to its dynamical nature, dissipative self-assembly can lead to new phenomena and possibilities of self-organization that are unavailable to equilibrium systems. Understanding the dynamics of dissipative self-assembly is required in order to direct the assembly to structures of interest. In the present work, Brownian dynamics simulations and analytical theory were used to study the dynamics of self-assembly of a mixture of particles coated with weak acids and bases under continuous oscillations of the pH. The pH of the system modulates the charge of the particles and, therefore, the interparticle forces oscillate in time. This system produces a variety of self-assembled structures, including colloidal molecules, fibers and different types of crystalline lattices. The most important conclusions of our study are: (i) in the limit of fast oscillations, the whole dynamics (and not only those at the non-equilibrium steady state) of a system of particles interacting through time-oscillating interparticle forces can be described by an effective potential that is the time average of the time-dependent potential over one oscillation period; (ii) the oscillation period is critical to determine the order of the system. In some cases the order is favored by very fast oscillations while in others small oscillation frequencies increase the order. In the latter case, it is shown that slow oscillations remove kinetic traps and, thus, allow the system to evolve towards the most stable non-equilibrium steady state.
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Affiliation(s)
- M. Tagliazucchi
- Department of Biomedical Engineering
- Department of Chemistry and Chemistry of Life Processes Institute
- Northwestern University
- Evanston
- USA
| | - I. Szleifer
- Department of Biomedical Engineering
- Department of Chemistry and Chemistry of Life Processes Institute
- Northwestern University
- Evanston
- USA
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18
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Aidarova S, Tleuova A, Sharipova A, Bekturganova N, Grigoriev D, Miller R. Optimization of polymerization process conditions during development of micro- and nanocapsules of hydrophobic agents based on Pickering emulsions. CHEMICAL BULLETIN OF KAZAKH NATIONAL UNIVERSITY 2015. [DOI: 10.15328/cb678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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19
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Mable CJ, Warren NJ, Thompson KL, Mykhaylyk OO, Armes SP. Framboidal ABC triblock copolymer vesicles: a new class of efficient Pickering emulsifier. Chem Sci 2015; 6:6179-6188. [PMID: 30090233 PMCID: PMC6054058 DOI: 10.1039/c5sc02346g] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 08/05/2015] [Indexed: 11/21/2022] Open
Abstract
Pickering emulsions offer important advantages over conventional surfactant-stabilized emulsions, including enhanced long-term stability, more reproducible formulations and reduced foaming problems. The recent development of polymerization-induced self-assembly (PISA) offers considerable scope for the design of a wide range of block copolymer nanoparticles with tunable surface wettability that may serve as bespoke Pickering emulsifiers. In the present study, we exploit PISA to design a series of model framboidal ABC triblock copolymer vesicles with exquisite control over surface roughness. Transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS) were utilized to characterize these nanoparticles, which were subsequently used to stabilize n-dodecane emulsion droplets in water. The adsorption efficiency, Aeff, of the nanoparticles at the n-dodecane/water interface was determined as a function of increasing vesicle surface roughness using a turbidimetry assay. A strong correlation between surface roughness and Aeff was observed, with Aeff increasing from 36% up to 94%. This is a significant improvement in Pickering emulsifier efficiency compared to that reported previously for similar vesicles with smooth surfaces. In summary, nanoparticles with appreciable surface roughness are much more effective Pickering emulsifiers and this parameter can be readily fine-tuned using a highly efficient PISA formulation.
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Affiliation(s)
- C J Mable
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK . ;
| | - N J Warren
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK . ;
| | - K L Thompson
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK . ;
| | - O O Mykhaylyk
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK . ;
| | - S P Armes
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK . ;
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20
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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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21
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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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22
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Tagliazucchi M, Zou F, Weiss EA. Kinetically Controlled Self-Assembly of Latex-Microgel Core-Satellite Particles. J Phys Chem Lett 2014; 5:2775-2780. [PMID: 26278077 DOI: 10.1021/jz5013609] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Latex-microgel core-satellite particles were prepared by electrostatic assembly of negatively charged polystyrene latex and positively charged microgels of a poly(N-isopropylmethacrylamide) (pNIPMAM) and poly[2-methacryloyloxy)ethyl] trimethylammonium chloride (pMETAC) copolymer. The number of satellites per core, determined by scanning electron microscopy, varied from 3 to 10 depending on the sizes of the microgel and latex microparticles. The numbers of satellites per core for different size ratios were compared with the predictions for thermodynamically controlled (maximum packing) and kinetically controlled (random sequential adsorption) assembly, and it was shown that the assembly of latex and microgel proceeds through a random sequential adsorption mechanism. The charges of the microgels and latex particles were retained within the assemblies; therefore, the core-satellite particles have well-defined regions of positive and negative charge. These regions were used to direct the adsorption of gold and latex nanoparticles of opposite charge in order to create multicomponent colloids.
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Affiliation(s)
- Mario Tagliazucchi
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Fengwei Zou
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Emily A Weiss
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
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23
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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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24
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Fielding LA, Lane JA, Derry MJ, Mykhaylyk OO, Armes SP. Thermo-responsive diblock copolymer worm gels in non-polar solvents. J Am Chem Soc 2014; 136:5790-8. [PMID: 24678949 PMCID: PMC4015619 DOI: 10.1021/ja501756h] [Citation(s) in RCA: 227] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Indexed: 12/17/2022]
Abstract
Benzyl methacrylate (BzMA) is polymerized using a poly(lauryl methacrylate) macromolecular chain transfer agent (PLMA macro-CTA) using reversible addition-fragmentation chain transfer (RAFT) polymerization at 70 °C in n-dodecane. This choice of solvent leads to an efficient dispersion polymerization, with polymerization-induced self-assembly (PISA) occurring via the growing PBzMA block to produce a range of PLMA-PBzMA diblock copolymer nano-objects, including spheres, worms, and vesicles. In the present study, particular attention is paid to the worm phase, which forms soft free-standing gels at 20 °C due to multiple inter-worm contacts. Such worm gels exhibit thermo-responsive behavior: heating above 50 °C causes degelation due to the onset of a worm-to-sphere transition. Degelation occurs because isotropic spheres interact with each other much less efficiently than the highly anisotropic worms. This worm-to-sphere thermal transition is essentially irreversible on heating a dilute solution (0.10% w/w) but is more or less reversible on heating a more concentrated dispersion (20% w/w). The relatively low volatility of n-dodecane facilitates variable-temperature rheological studies, which are consistent with eventual reconstitution of the worm phase on cooling to 20 °C. Variable-temperature (1)H NMR studies conducted in d26-dodecane confirm partial solvation of the PBzMA block at elevated temperature: surface plasticization of the worm cores is invoked to account for the observed change in morphology, because this is sufficient to increase the copolymer curvature and hence induce a worm-to-sphere transition. Small-angle X-ray scattering and TEM are used to investigate the structural changes that occur during the worm-to-sphere-to-worm thermal cycle; experiments conducted at 1.0 and 5.0% w/w demonstrate the concentration-dependent (ir)reversibility of these morphological transitions.
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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
| | - Jacob A. Lane
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Matthew J. Derry
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Oleksandr O. Mykhaylyk
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Steven P. Armes
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
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25
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Li Y, Gao Y, Yang C, Sha S, Hao J, Wu Y. Facile synthesis of polystyrene/gold composite particles as a highly active and reusable catalyst for aerobic oxidation of benzyl alcohol in water. RSC Adv 2014. [DOI: 10.1039/c4ra01522c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Herein is reported a facile synthesis of polystyrene/gold composite particles with high catalytic activity and good reusability for aerobic oxidation of benzyl alcohol under mild conditions.
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Affiliation(s)
- Yunxing Li
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Yan Gao
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Cheng Yang
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Shengsheng Sha
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Jiefu Hao
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Yan Wu
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
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26
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Zhang Y, Chen Z, Dong Z, Zhao M, Ning S, He P. Preparation of Raspberry-Like Adsorbed Silica Nanoparticles via Miniemulsion Polymerization Using a Glycerol-Functionalized Silica Sol. INT J POLYM MATER PO 2013. [DOI: 10.1080/00914037.2012.719135] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Schrade A, Landfester K, Ziener U. Pickering-type stabilized nanoparticles by heterophase polymerization. Chem Soc Rev 2013; 42:6823-39. [DOI: 10.1039/c3cs60100e] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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28
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Au KM, Armes SP. Heterocoagulation as a facile route to prepare stable serum albumin-nanoparticle conjugates for biomedical applications: synthetic protocols and mechanistic insights. ACS NANO 2012; 6:8261-8279. [PMID: 22913736 DOI: 10.1021/nn302968j] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
There is increasing interest in using serum albumin, the most abundant plasma protein, as a stabilizing agent in the context of nanomedicine. Using poly(vinyl amine)-stabilized polypyrrole nanoparticles as an example, we report a facile generic route to prepare serum albumin-nanoparticle conjugates via heterocoagulation. Time-resolved dynamic light scattering (DLS), disk centrifuge photosedimentometry (DCP), and circular dichroism (CD) spectroscopy studies confirm that bovine serum albumin (BSA) adsorbs rapidly onto the cationic poly(vinyl amine)-stabilized polypyrrole nanoparticles and suggest that the initial well-defined protein coronal is subsequently cross-linked via thiol-disulfide exchange. These BSA-nanoparticle conjugates were further characterized by X-ray photoelectron spectroscopy (XPS), aqueous electrophoresis, field emission scanning electron microscopy (FE SEM), and transmission electron microscopy (TEM). They exhibit excellent long-term colloidal stability under physiological conditions without further purification, suggesting strong irreversible adsorption by the BSA. Protein adsorption appears to be co-operative and both thermodynamic and mechanistic aspects were examined via aqueous electrophoresis, DCP, and DLS studies.
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Affiliation(s)
- Kin Man Au
- Department of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, UK
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29
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Schrade A, Mailänder V, Ritz S, Landfester K, Ziener U. Surface Roughness and Charge Influence the Uptake of Nanoparticles: Fluorescently Labeled Pickering-Type Versus Surfactant-Stabilized Nanoparticles. Macromol Biosci 2012; 12:1459-71. [DOI: 10.1002/mabi.201200166] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 06/29/2012] [Indexed: 11/11/2022]
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30
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Li Y, Wang Z, Wang C, Pan Y, Gu H, Xue G. Colloid thermodynamic effect as the universal driving force for fabricating various functional composite particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:12704-12710. [PMID: 22889107 DOI: 10.1021/la302068c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The design and fabrication of functional nanocomposites is an active area of research because composite particles have significantly improved physical and chemical properties over those of their single-component counterparts. Traditionally, chemical pretreatments of the components were used to enhance their physicochemical or chemical interactions. Here, we propose a novel approach to taking advantage of the beauty of thermodynamics. A series of functional materials, including graphene nanosheets, carbon nanotubes, noble metals, magnetic materials, conducting polymers, attapulgite, and etc. were incorporated with polystyrene particles by a thermodynamic driving force. This unique approach is facile and versatile and shows the considerable significance of developments in both scientific methodology and particle engineering.
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Affiliation(s)
- Yunxing Li
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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31
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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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32
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Schrade A, Mikhalevich V, Landfester K, Ziener U. Synthesis and characterization of positively charged, alumina‐coated silica/polystyrene hybrid nanoparticles via pickering miniemulsion polymerization. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24932] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Anika Schrade
- Institute of Organic Chemistry III–Macromolecular Chemistry and Organic Materials, University of Ulm, Albert‐Einstein‐Allee 11, 89081 Ulm, Germany
| | - Viktoria Mikhalevich
- Institute of Organic Chemistry III–Macromolecular Chemistry and Organic Materials, University of Ulm, Albert‐Einstein‐Allee 11, 89081 Ulm, Germany
| | | | - Ulrich Ziener
- Institute of Organic Chemistry III–Macromolecular Chemistry and Organic Materials, University of Ulm, Albert‐Einstein‐Allee 11, 89081 Ulm, Germany
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33
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Fielding LA, Tonnar J, Armes SP. All-acrylic film-forming colloidal polymer/silica nanocomposite particles prepared by aqueous emulsion polymerization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:11129-11144. [PMID: 21776995 DOI: 10.1021/la202066n] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The efficient synthesis of all-acrylic, film-forming, core-shell colloidal nanocomposite particles via in situ aqueous emulsion copolymerization of methyl methacrylate with n-butyl acrylate in the presence of a glycerol-functionalized ultrafine silica sol using a cationic azo initiator at 60 °C is reported. It is shown that relatively monodisperse nanocomposite particles can be produced with typical mean weight-average diameters of 140-330 nm and silica contents of up to 39 wt %. The importance of surface functionalization of the silica sol is highlighted, and it is demonstrated that systematic variation of parameters such as the initial silica sol concentration and initiator concentration affect both the mean particle diameter and the silica aggregation efficiency. The nanocomposite morphology comprises a copolymer core and a particulate silica shell, as determined by aqueous electrophoresis, X-ray photoelectron spectroscopy, and electron microscopy. Moreover, it is shown that films cast from n-butyl acrylate-rich copolymer/silica nanocomposite dispersions are significantly more transparent than those prepared from the poly(styrene-co-n-butyl acrylate)/silica nanocomposite particles reported previously. In the case of the aqueous emulsion homopolymerization of methyl methacrylate in the presence of ultrafine silica, a particle formation mechanism is proposed to account for the various experimental observations made when periodically sampling such nanocomposite syntheses at intermediate comonomer conversions.
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Affiliation(s)
- Lee A Fielding
- Dainton Building, Department of Chemistry, The University of Sheffield, Brook Hill, Sheffield, S3 7HF, UK
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34
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Balmer JA, Mykhaylyk OO, Schmid A, Armes SP, Fairclough JPA, Ryan AJ. Characterization of polymer-silica nanocomposite particles with core-shell morphologies using Monte Carlo simulations and small angle X-ray scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8075-8089. [PMID: 21661736 DOI: 10.1021/la201319h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A two-population model based on standard small-angle X-ray scattering (SAXS) equations is verified for the analysis of core-shell structures comprising spherical colloidal particles with particulate shells. First, Monte Carlo simulations of core-shell structures are performed to demonstrate the applicability of the model. Three possible shell packings are considered: ordered silica shells due to either charge-dependent repulsive or size-dependent Lennard-Jones interactions or randomly arranged silica particles. In most cases, the two-population model produces an excellent fit to calculated SAXS patterns for the simulated core-shell structures, together with a good correlation between the fitting parameters and structural parameters used for the simulation. The limits of application are discussed, and then, this two-population model is applied to the analysis of well-defined core-shell vinyl polymer/silica nanocomposite particles, where the shell comprises a monolayer of spherical silica nanoparticles. Comprehensive SAXS analysis of a series of poly(styrene-co-n-butyl acrylate)/silica colloidal nanocomposite particles (prepared by the in situ emulsion copolymerization of styrene and n-butyl acrylate in the presence of a glycerol-functionalized silica sol) allows the overall core-shell particle diameter, the copolymer latex core diameter and polydispersity, the mean silica shell thickness, the mean silica diameter and polydispersity, the volume fractions of the two components, the silica packing density, and the silica shell structure to be obtained. These experimental SAXS results are consistent with electron microscopy, dynamic light scattering, thermogravimetry, helium pycnometry, and BET surface area studies. The high electron density contrast between the (co)polymer and the silica components, together with the relatively low polydispersity of these core-shell nanocomposite particles, makes SAXS ideally suited for the characterization of this system. Moreover, these results can be generalized for other types of core-shell colloidal particles.
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Affiliation(s)
- Jennifer A Balmer
- Dainton Building, Department of Chemistry, The University of Sheffield, Sheffield, Brook Hill, S3 7HF, United Kingdom
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35
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Cao Z, Schrade A, Landfester K, Ziener U. Synthesis of raspberry-like organic-inorganic hybrid nanocapsules via pickering miniemulsion polymerization: Colloidal stability and morphology. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24668] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hu H, Zhou H, Liang J, An L, Dai A, Li X, Yang H, Yang S, Wu H. Facile synthesis of amino-functionalized hollow silica microspheres and their potential application for ultrasound imaging. J Colloid Interface Sci 2011; 358:392-8. [PMID: 21481405 DOI: 10.1016/j.jcis.2011.03.051] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Revised: 03/12/2011] [Accepted: 03/17/2011] [Indexed: 11/19/2022]
Abstract
By using the positive charged polystyrene (PS) microsphere as template, mono-disperse amino-(-NH(2)) functionalized hollow silica microspheres (HSMS-NH(2)) with ~1310 nm in diameter and uniform shells were successfully prepared with a modified sol-gel process. The amino functionalized silica were coated on the PS microspheres via ammonia catalysis, co-hydrolysis and condensation of TEOS and APTES, and then the PS templates were selectively dissolved in THF solution to form the functional hollow microspheres. The controllable thickness (35-85 nm) and amino density (2.46×10(-5)-6.18×10(-5) mol/g) of the shells could be facilely tuned by changing the amount of TEOS and APTES. In vitro ultrasound images of as-prepared HSMS-NH(2) with different concentrations in the physiological saline solution were further investigated. The obvious signal enhancement indicates that as-prepared HSMS-NH(2) has a great potential application for ultrasound imaging.
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Affiliation(s)
- He Hu
- Department of Chemistry, Shanghai Normal University, No. 100, Guilin Road, Shanghai 200234, PR China
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Li Y, Wang Z, Gu H, Xue G. A facile strategy for synthesis of multilayer and conductive organo-silica/polystyrene/polyaniline composite particles. J Colloid Interface Sci 2011; 355:269-73. [DOI: 10.1016/j.jcis.2010.12.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2010] [Revised: 12/16/2010] [Accepted: 12/17/2010] [Indexed: 11/24/2022]
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Choi M, Kim C, Ok Jeon S, Soo Yook K, Yeob Lee J, Jang J. Synthesis of titania embedded silica hollow nanospheres via sonication mediated etching and re-deposition. Chem Commun (Camb) 2011; 47:7092-4. [DOI: 10.1039/c1cc11185j] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ning Y, Zhang H, Han J, Yang C, Liu Y, Zhou D, Yang B. Versatile fabrication of water-dispersible nanoparticle–amphiphilic copolymer composite microspheres with specific functionalities. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm00021g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Balmer JA, Mykhaylyk OO, Armes SP, Fairclough JPA, Ryan AJ, Gummel J, Murray MW, Murray KA, Williams NSJ. Time-resolved small-angle X-ray scattering studies of polymer-silica nanocomposite particles: initial formation and subsequent silica redistribution. J Am Chem Soc 2010; 133:826-37. [PMID: 21171624 DOI: 10.1021/ja106924t] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Small angle X-ray scattering (SAXS) is a powerful characterization technique for the analysis of polymer-silica nanocomposite particles due to their relatively narrow particle size distributions and high electron density contrast between the polymer core and the silica shell. Time-resolved SAXS is used to follow the kinetics of both nanocomposite particle formation (via silica nanoparticle adsorption onto sterically stabilized poly(2-vinylpyridine) (P2VP) latex in dilute aqueous solution) and also the spontaneous redistribution of silica that occurs when such P2VP-silica nanocomposite particles are challenged by the addition of sterically stabilized P2VP latex. Silica adsorption is complete within a few seconds at 20 °C and the rate of adsorption strongly dependent on the extent of silica surface coverage. Similar very short time scales for silica redistribution are consistent with facile silica exchange occurring as a result of rapid interparticle collisions due to Brownian motion; this interpretation is consistent with a zeroth-order Smoluchowski-type calculation.
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Affiliation(s)
- Jennifer A Balmer
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, S3 7HF, UK
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