1
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Miyagawa A, Nakatani K. Kinetic detection of hydrogen peroxide in single horseradish peroxidase-concentrated silica particle using confocal fluorescence microspectroscopic measurement. Talanta 2024; 273:125925. [PMID: 38527412 DOI: 10.1016/j.talanta.2024.125925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 03/11/2024] [Accepted: 03/13/2024] [Indexed: 03/27/2024]
Abstract
In the present study, we propose a scheme for detecting H2O2 by using horseradish peroxidase (HRP) adsorbed onto single silica particles and fluorescence microspectroscopy. When the silica particles were immersed in an HRP solution, the HRP concentration in the silica particles increased by a factor of 690 compared to that in the bulk aqueous solution because HRP was adsorbed on the silica surface. When a single particle containing HRP was added to a mixed solution of H2O2 and Amplex Red, fluorescence from resorufin, which was produced by the reaction of HRP, H2O2, and Amplex Red, was observed. The fluorescence from the resorufin in the particles increased after a single particle was added to the solution, and the release of resorufin was observed. As the concentration of H2O2 (CH2O2) decreased, the time it takes for fluorescence intensity to reach its maximum was shorter. The detection limit for H2O2 in the present system was 980 nM. The reaction behavior of a single silica particle was evaluated using a spherical diffusion model, which explains the approximate concentration change of resorufin in the silica particle. The proposed method has the advantages of simple sample preparation and detection, low sample consumption, and a short detection time.
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Affiliation(s)
- Akihisa Miyagawa
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
| | - Kiyoharu Nakatani
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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2
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Dai H, Li K, Yang D. Controllable Regulation of Diesel Oil-in-Water Pickering Emulsion Stability by Multiresponsive Recyclable Magnetic Polymer Brush Microvessels. ACS APPLIED MATERIALS & INTERFACES 2024; 16:17715-17727. [PMID: 38551105 DOI: 10.1021/acsami.4c03069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
To ensure safety and efficiency in the production and transportation of fuel oil, there is an urgent demand to develop intelligent emulsifiers to deal with this challenge. Fe3O4@PDA-P(NIPAM-b-MAA-b-LMA) (MNPDNML) microspheres were prepared by modifying polydopamine and the triblock polymer brush P(NIPAM-b-MAA-b-LMA) on the surface of Fe3O4 nanoparticles via oxidative autopolymerization and SI-RAFT polymerization. Therefore, the MNPDNML microspheres exhibited sensitive stimulus-responsive behavior to pH, temperature, near-infrared (NIR) laser radiation, and magnetic fields. The stability state of the emulsion could be modulated by changing pH, temperature, magnetic field, and NIR radiation, and the reversible switching of emulsification/breaking behavior could be reached at least 10 times. This "intelligent emulsifier" exhibited high emulsification efficiency, long-term stability, and on-demand emulsification/breaking properties. It was notable that MNPDNML microspheres showed excellent emulsification ability for olive oil, kerosene, gasoline, and crude oil, which allowed the material to be widely used in the controlled transportation and separation of fuel oil.
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Affiliation(s)
- Hui Dai
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, PR China
| | - Keran Li
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, PR China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610500, PR China
| | - Dongxu Yang
- State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, P. R. China
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3
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Zhang Z, Lynch CJ, Huo Y, Chakraborty S, Cremer PS, Mozhdehi D. Modulating Phase Behavior in Fatty Acid-Modified Elastin-like Polypeptides (FAMEs): Insights into the Impact of Lipid Length on Thermodynamics and Kinetics of Phase Separation. J Am Chem Soc 2024; 146:5383-5392. [PMID: 38353994 PMCID: PMC10910508 DOI: 10.1021/jacs.3c12791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/22/2024] [Accepted: 01/29/2024] [Indexed: 02/29/2024]
Abstract
Although post-translational lipidation is prevalent in eukaryotes, its impact on the liquid-liquid phase separation of disordered proteins is still poorly understood. Here, we examined the thermodynamic phase boundaries and kinetics of aqueous two-phase system (ATPS) formation for a library of elastin-like polypeptides modified with saturated fatty acids of different chain lengths. By systematically altering the physicochemical properties of the attached lipids, we were able to correlate the molecular properties of lipids to changes in the thermodynamic phase boundaries and the kinetic stability of droplets formed by these proteins. We discovered that increasing the chain length lowers the phase separation temperature in a sigmoidal manner due to alterations in the unfavorable interactions between protein and water and changes in the entropy of phase separation. Our kinetic studies unveiled remarkable sensitivity to lipid length, which we propose is due to the temperature-dependent interactions between lipids and the protein. Strikingly, we found that the addition of just a single methylene group is sufficient to allow tuning of these interactions as a function of temperature, with proteins modified with C7-C9 lipids exhibiting non-Arrhenius dependence in their phase separation, a behavior that is absent for both shorter and longer fatty acids. This work advances our theoretical understanding of protein-lipid interactions and opens avenues for the rational design of lipidated proteins in biomedical paradigms, where precise control over the phase separation is pivotal.
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Affiliation(s)
- Zhe Zhang
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Christopher J. Lynch
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Ying Huo
- Department
of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Somya Chakraborty
- Fayetteville-Manlius
High School, Manlius, New York 13104, United States
| | - Paul S. Cremer
- Department
of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Davoud Mozhdehi
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
- BioInspired
Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, New York 13244, United States
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4
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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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5
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Wang G, Cai G, Zhang M, Wang Z, Li C, Zhang Y. Synthesis of polymeric emulsifiers based on ketoaldehyde resin and their application in emulsifying styrene/water two‐phase system. J Appl Polym Sci 2021. [DOI: 10.1002/app.52107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Guolin Wang
- School of Chemical Engineering Zhengzhou University Zhengzhou China
| | - Guiting Cai
- School of Chemical Engineering Zhengzhou University Zhengzhou China
| | - Menghao Zhang
- School of Chemical Engineering Zhengzhou University Zhengzhou China
| | - Ziyu Wang
- School of Chemical Engineering Zhengzhou University Zhengzhou China
| | - Chaofeng Li
- School of Chemical Engineering Zhengzhou University Zhengzhou China
| | - Yanwu Zhang
- School of Chemical Engineering Zhengzhou University Zhengzhou China
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6
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Sankova N, Shalaev P, Semeykina V, Dolgushin S, Odintsova E, Parkhomchuk E. Spectrally encoded microspheres for immunofluorescence analysis. J Appl Polym Sci 2020. [DOI: 10.1002/app.49890] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Natalya Sankova
- Department of Natural Sciences Novosibirsk State University Novosibirsk Russian Federation
- Boreskov Institute of Catalysis SB RAS, Group of template synthesis Novosibirsk Russian Federation
| | - Pavel Shalaev
- Gamaleya Research Center of Epidemiology and Microbiology, Translational Biomedicine Laboratory Moscow Russian Federation
- Aivok LLC Moscow Russian Federation
- National Research University of Electronic Technology, Institute of Biomedical Systems Moscow Russian Federation
| | - Viktoriya Semeykina
- Department of Natural Sciences Novosibirsk State University Novosibirsk Russian Federation
- Boreskov Institute of Catalysis SB RAS, Group of template synthesis Novosibirsk Russian Federation
| | - Sergey Dolgushin
- Gamaleya Research Center of Epidemiology and Microbiology, Translational Biomedicine Laboratory Moscow Russian Federation
- Aivok LLC Moscow Russian Federation
| | - Elena Odintsova
- Sechenov First Moscow State Medical University Moscow Russian Federation
| | - Ekaterina Parkhomchuk
- Department of Natural Sciences Novosibirsk State University Novosibirsk Russian Federation
- Boreskov Institute of Catalysis SB RAS, Group of template synthesis Novosibirsk Russian Federation
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7
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Seibert JB, Viegas JSR, Almeida TC, Amparo TR, Rodrigues IV, Lanza JS, Frézard FJG, Soares RDOA, Teixeira LFM, de Souza GHB, Vieira PMA, Barichello JM, Dos Santos ODH. Nanostructured Systems Improve the Antimicrobial Potential of the Essential Oil from Cymbopogon densiflorus Leaves. JOURNAL OF NATURAL PRODUCTS 2019; 82:3208-3220. [PMID: 31815454 DOI: 10.1021/acs.jnatprod.8b00870] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The physicochemical characteristics of nanostructured suspensions are important prerequisites for the success of new drug development. This work aimed to develop nanometric systems containing Cymbopogon densiflorus leaf essential oil and to evaluate their antimicrobial activity. The essential oil was isolated by hydrodistillation from leaves and analyzed by GC-MS. The main constituents were found to be trans-p-mentha-2,8-dien-1-ol, cis-p-mentha-2,8-dien-1-ol, trans-p-mentha-1(7),8-dien-2-ol, cis-piperitol, and cis-p-mentha-1(7),8-dien-2-ol. In silico prediction analysis suggested that this oil possesses antimicrobial potential and the main mechanism of action might be the peptidoglycan glycosyltransferase inhibition. Nanoemulsions were prepared by the phase inversion method, and liposomes were made by the film hydration method. Qualitative evaluation of the antimicrobial activity was performed by the diffusion disk assay with 24 microorganisms; all of them were found to be sensitive to the essential oil. Subsequently, this property was quantified by the serial microdilution technique, where the nanoformulations demonstrated improved activity in comparison with the free oil. Bactericidal action was tested by the propidium iodide method, which revealed that free essential oil and nanoemulsion increased cytoplasmic membrane permeability, while no difference was observed between negative control and liposome. These results were confirmed by images obtained using transmission electron microscopy. This study has shown an optimization in the antimicrobial activity of C. densiflorus essential oil by a nanoemulsion and a liposomal formulation of the active substances.
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Affiliation(s)
- Janaína B Seibert
- Departamento de Farmácia , Universidade Federal de Ouro Preto , Ouro Preto , 35400-000 , Brazil
| | - Juliana S R Viegas
- Departamento de Farmácia , Universidade Federal de Ouro Preto , Ouro Preto , 35400-000 , Brazil
| | - Tamires C Almeida
- Departamento de Farmácia , Universidade Federal de Ouro Preto , Ouro Preto , 35400-000 , Brazil
| | - Tatiane R Amparo
- Departamento de Farmácia , Universidade Federal de Ouro Preto , Ouro Preto , 35400-000 , Brazil
| | - Ivanildes V Rodrigues
- Departamento de Farmácia , Universidade Federal de Juiz de Fora , Governador Valadares , 36010-041 , Brazil
| | - Juliane S Lanza
- Departamento de Fisiologia e Biofísica , Universidade Federal de Minas Gerais , Belo Horizonte , 30150-260 , Brazil
| | - Frédéric J G Frézard
- Departamento de Fisiologia e Biofísica , Universidade Federal de Minas Gerais , Belo Horizonte , 30150-260 , Brazil
| | - Rodrigo D O A Soares
- Núcleo de Pesquisas em Ciências Biológicas , Universidade Federal de Ouro Preto , Ouro Preto , 35400-000 , Brazil
| | - Luiz Fernando M Teixeira
- Departamento de Análises Clínicas , Universidade Federal de Ouro Preto , Ouro Preto , 35400-000 , Brazil
| | - Gustavo H B de Souza
- Departamento de Farmácia , Universidade Federal de Ouro Preto , Ouro Preto , 35400-000 , Brazil
| | - Paula M A Vieira
- Departamento de Ciências Biológicas , Universidade Federal de Ouro Preto , Ouro Preto , 35400-000 , Brazil
| | - José M Barichello
- Departamento de Farmácia , Universidade Federal de Pelotas , Pelotas , 96020-000 , Brazil
| | - Orlando D H Dos Santos
- Departamento de Farmácia , Universidade Federal de Ouro Preto , Ouro Preto , 35400-000 , Brazil
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8
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Ribeiro EB, de Marchi PGF, Honorio-França AC, França EL, Soler MAG. Interferon-gamma carrying nanoemulsion with immunomodulatory and anti-tumor activities. J Biomed Mater Res A 2019; 108:234-245. [PMID: 31587469 DOI: 10.1002/jbm.a.36808] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 09/14/2019] [Accepted: 09/16/2019] [Indexed: 12/20/2022]
Abstract
The therapeutic administration of cytokines has been introduced aiming to modulate the immune response system, seeking for different approaches to face pathologies such as cancer, auto immune and infectious diseases. The objective of this study was to investigate the effects of a stable oil-in-water (O/W) nanoemulsion system carrying the cytokine Interferon gamma (IFN-γ) on the activity of phagocytes and MCF-7 human breast cancer cells. Nanoemulsions were prepared through ultra-homogenization, and they consisted of distilled water, triglycerides of capric acid/caprylic, sorbitan-oleate, polysorbate 80, and 1-butanol. IFN-γ (100 ng ml-1 ) was incorporated into two O/W nanoemulsion formulations, and these formulations were characterized in terms of their preliminary and accelerated physicochemical stability, rheological properties, droplet size, polydispersity and surface charge. We identified the most optimal IFN-γ nanoemulsion (IFN-γNE2), which remained stable under extreme temperature variations for 90 days, contained an average dose of 97 ng ml-1 of IFN-γ and exhibited a biocompatible pH and a relative stable rheological profile. Cell viability and intracellular Ca2+ release assays conducted showed that IFN-γNE2 reduced the cell viability of MCF-7 cells without affecting the cell viability of phagocytes. Furthermore, IFN-γNE2 was able to induce cellular activity of phagocytes as evidenced by increased intracellular Ca2+ release in these cells. Our findings on this IFN-γ nanoemulsion suggest that it can be a promising therapeutic agent for immunostimulation and cancer treatment.
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Affiliation(s)
- Elton B Ribeiro
- Institute of Physics, University of Brasilia, Brasilia-DF, Brazil.,Institute of Health Science, Federal University of Mato Grosso, Sinop, MT, Brazil
| | - Patricia G F de Marchi
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, MT, Brazil
| | - Adenilda C Honorio-França
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, MT, Brazil
| | - Eduardo L França
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, MT, Brazil
| | - Maria A G Soler
- Institute of Physics, University of Brasilia, Brasilia-DF, Brazil
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9
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Liu X, Lu Y. Tailoring Emulsion Polymerization for High-Yield Synthesis of Tween 80 Stabilized Magnetic Cross-Linked Polystyrene Nanocomposite Particles. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaojing Liu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing100084, China
| | - Yangcheng Lu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing100084, China
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10
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Seibert JB, Rodrigues IV, Carneiro SP, Amparo TR, Lanza JS, Frézard FJG, de Souza GHB, Santos ODHD. Seasonality study of essential oil from leaves of Cymbopogon densiflorus
and nanoemulsion development with antioxidant activity. FLAVOUR FRAG J 2018. [DOI: 10.1002/ffj.3472] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | | | | | | | - Juliane Sousa Lanza
- Department of Physiology and Biophysics; Federal University of Minas Gerais; Belo Horizonte Brazil
| | - Frédéric Jean G. Frézard
- Department of Physiology and Biophysics; Federal University of Minas Gerais; Belo Horizonte Brazil
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11
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Liu XJ, Tian YH, Lu YC. A Comparative Study on Emulsion Polymerization Processes of Styrene Initiated by Water-soluble and Oil-soluble Initiators. CHINESE JOURNAL OF POLYMER SCIENCE 2018. [DOI: 10.1007/s10118-019-2186-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Torres-Rocha OL, Wu X, Zhu C, Crudden CM, Cunningham MF. Polymerization-Induced Self-Assembly (PISA) of 1,5-Cyclooctadiene Using Ring Opening Metathesis Polymerization. Macromol Rapid Commun 2018; 40:e1800326. [DOI: 10.1002/marc.201800326] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 06/22/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Olga Lidia Torres-Rocha
- Department of Chemical Engineering; Queen's University; 19 Division St Kingston Ontario K7L 3N6 Canada
| | - Xiaowei Wu
- Department of Chemistry; Queen's University; 90 Bader Lane Kingston Ontario K7L 3N6 Canada
| | - Chunyang Zhu
- Department of Chemical Engineering; Queen's University; 19 Division St Kingston Ontario K7L 3N6 Canada
| | - Cathleen M. Crudden
- Department of Chemistry; Queen's University; 90 Bader Lane Kingston Ontario K7L 3N6 Canada
| | - Michael F. Cunningham
- Department of Chemical Engineering; Queen's University; 19 Division St Kingston Ontario K7L 3N6 Canada
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13
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Deshpande TM, Quadir A, Obara S, Hoag SW. Impact of formulation excipients on the thermal, mechanical, and electrokinetic properties of hydroxypropyl methylcellulose acetate succinate (HPMCAS). Int J Pharm 2018; 542:132-141. [DOI: 10.1016/j.ijpharm.2018.02.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 02/04/2018] [Accepted: 02/15/2018] [Indexed: 11/16/2022]
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14
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One-Pot Synthesis of Waterborne Polymeric Dispersions Stabilized with Alkali-Soluble Resins. Polymers (Basel) 2018; 10:polym10010088. [PMID: 30966124 PMCID: PMC6415037 DOI: 10.3390/polym10010088] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 01/12/2018] [Accepted: 01/15/2018] [Indexed: 11/17/2022] Open
Abstract
Alkali-soluble resins (ASRs) are a type of electrosteric emulsifiers of high interest because they can profitably improve the features of waterborne dispersions. In this work, they have been synthesized in-situ through a one-pot approach and they have been used as polymeric surfactants for a second emulsion polymerization step in the same reactor. This strategy provides some advantages compared to other polymerization techniques, like the intensification of the process and the absence of organic solvents. Their use can also further reduce the environmental impact of formulations for film-forming applications, since grafting reactions with the particles have been observed and quantified in relation with the synthetic parameters. These chemical linkages with the particles may reduce the leaching and the release of surfactants from polymeric films, for example in water-based coatings or adhesives. The systems have been also studied from the kinetics point of view, finding relevant differences with other electrosterically stabilized processes from the literature, as well as concerns the nucleation mechanism.
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15
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Bandiera M, Balk R, Barandiaran MJ. Grafting in polymeric dispersions stabilized with Alkali-Soluble Resins: Towards the production of leaching-free waterborne coatings. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Worthington KS, Baguenard C, Forney BS, Guymon CA. Photopolymerization kinetics in and of self-assembling lyotropic liquid crystal templates. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24296] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kristan S. Worthington
- Department of Chemical and Biochemical Engineering; The University of Iowa, 4133 Seamans Center; Iowa City Iowa 52242
- Department of Ophthalmology and Visual Sciences; The University of Iowa, 4156 Medical Education and Research Facility; Iowa City Iowa 52242
| | - Céline Baguenard
- Department of Chemical and Biochemical Engineering; The University of Iowa, 4133 Seamans Center; Iowa City Iowa 52242
- Cheminnov - ENSCBP; CANOE; 16 Avenue Pey Berland Pessac 33600 France
| | - Bradley S. Forney
- Department of Chemical and Biochemical Engineering; The University of Iowa, 4133 Seamans Center; Iowa City Iowa 52242
- 3M Construction & Home Improvement Markets Division; 3M Center; 251-1E-19 St. Paul Minnesota 55144
| | - C. Allan Guymon
- Department of Chemical and Biochemical Engineering; The University of Iowa, 4133 Seamans Center; Iowa City Iowa 52242
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17
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Synthesis of Polystyrene Beads for Hard-Templating of Three-Dimensionally Ordered Macroporosity and Hierarchical Texture of Adsorbents and Catalysts. Top Catal 2016. [DOI: 10.1007/s11244-016-0719-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Liu B, Sun S, Zhang M, Ren L, Zhang H. Facile synthesis of large scale and narrow particle size distribution polymer particles via control particle coagulation during one-step emulsion polymerization. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.07.050] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Chakrabarty A, Singha NK. Tailor-made polyfluoroacrylate and its block copolymer by RAFT polymerization in miniemulsion; improved hydrophobicity in the core–shell block copolymer. J Colloid Interface Sci 2013; 408:66-74. [DOI: 10.1016/j.jcis.2013.07.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 07/16/2013] [Accepted: 07/17/2013] [Indexed: 12/01/2022]
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20
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21
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Sheibat‐Othman N, Cenacchi‐Pereira A, Santos AMD, Bourgeat‐Lami E. A kinetic investigation of surfactant‐free emulsion polymerization of styrene using laponite clay platelets as stabilizers. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24924] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Nida Sheibat‐Othman
- Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, UMR 5007, Laboratoire d'Automatique et de Génie des Procédés (LAGEP), 43, Boulevard du 11 Novembre 1918, F‐69616 Villeurbanne, France
| | - Ana‐Maria Cenacchi‐Pereira
- Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), LCPP group, 43, Boulevard du 11 Novembre 1918, F‐69616, Villeurbanne, France
| | | | - Elodie Bourgeat‐Lami
- Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), LCPP group, 43, Boulevard du 11 Novembre 1918, F‐69616, Villeurbanne, France
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22
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Santos ODH, Morais JM, Andrade FF, Aguiar TA, Rocha Filho PA. Development of Vegetable Oil Emulsions with Lamellar Liquid-Crystalline Structures. J DISPER SCI TECHNOL 2011. [DOI: 10.1080/01932691003662464] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Walsh A, Thompson KL, Armes SP, York DW. Polyamine-functional sterically stabilized latexes for covalently cross-linkable colloidosomes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:18039-18048. [PMID: 21062023 DOI: 10.1021/la103804y] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Sterically stabilized polystyrene latexes were prepared by aqueous emulsion polymerization using a poly(ethylene imine) (PEI) stabilizer in the presence of 4-vinylbenzyl chloride (4-VBC; 1.0 wt % based on styrene). Partial quaternization of the amine groups on the PEI chains by 4-VBC occurs in situ, hence producing a chemically grafted steric stabilizer. Such 4-VBC-modified PEI chains were grafted more efficiently onto the polystyrene particles than unmodified PEI, as judged by aqueous electrophoresis, XPS, and nitrogen microanalysis. Moreover, partially quaternized PEI gave significantly smaller polystyrene particles than those synthesized in the absence of any PEI stabilizer or those synthesized using unmodified PEI. The partially quaternized PEI-stabilized polystyrene latex proved to be an effective emulsifier at pH 9, forming stable oil-in-water Pickering emulsions when homogenized (12,000 rpm, 2 min, 20 °C) with four model oils, namely, n-dodecane, methyl myristate, isononyl isononanoate, and sunflower oil. The primary and/or secondary amine groups on the PEI stabilizer chains were successfully cross-linked using three commercially available polymeric reagents, namely, tolylene 2,4-diisocyanate-terminated poly(propylene glycol) (PPG-TDI), poly(propylene glycol) diglycidyl ether (PPG-DGE), or poly(ethylene glycol) diglycidyl ether (PEG-DGE). Cross-linking with the former reagent led to robust colloidosomes that survived the removal of the internal oil phase on washing with excess alcohol, as judged by optical microscopy and SEM. PPG-TDI reacted very rapidly with the PEI stabilizer chains, with cross-linking being achieved during homogenization. Well-defined colloidosomes could be formed only by using sunflower oil and isononyl isononanoate with this cross-linker at 20 °C. However, cooling to 0 °C allowed colloidosomes to be formed using n-dodecane, presumably because of the slower rate of cross-linking at this reduced temperature. PPG-DGE proved to be a more generic cross-linker because it formed robust colloidosomes with all four model oils. However, cross-linking was much slower than that achieved using PPG-TDI, with intact colloidosomes being formed only after ∼12 h at 20 °C. The PEG-DGE cross-linker allowed cross-linking to be conducted at 20 °C from the aqueous phase (rather from within the oil droplets for the oil-soluble PPG-TDI or PPG-DGE cross-linkers). In this case, well-defined colloidosomes were obtained at 50 vol % with surprisingly little intercolloidosome aggregation, as judged by laser diffraction studies.
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Affiliation(s)
- A Walsh
- Dainton Building, Department of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, UK
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24
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Muñoz-Bonilla A, van Herk AM, Heuts JPA. Preparation of Hairy Particles and Antifouling Films Using Brush-Type Amphiphilic Block Copolymer Surfactants in Emulsion Polymerization. Macromolecules 2010. [DOI: 10.1021/ma9027257] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexandra Muñoz-Bonilla
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Instituto de Ciencia y Tecnología de Polímeros (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
| | - Alex M. van Herk
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Johan P. A. Heuts
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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25
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Thompson KL, Armes SP, York DW, Burdis JA. Synthesis of Sterically-Stabilized Latexes Using Well-Defined Poly(glycerol monomethacrylate) Macromonomers. Macromolecules 2010. [DOI: 10.1021/ma9027799] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. L. Thompson
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF United Kingdom
| | - S. P. Armes
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF United Kingdom
| | - D. W. York
- Procter & Gamble, Newcastle Technical Centre, Whitley Road, Longbenton, Newcastle-upon-Tyne, NE12 9TS United Kingdom
| | - J. A. Burdis
- Procter & Gamble, Newcastle Technical Centre, Whitley Road, Longbenton, Newcastle-upon-Tyne, NE12 9TS United Kingdom
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26
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Chen L, Yan L, Li Q, Wang C, Chen S. Controllable synthesis of new polymerizable macrosurfactants via CCTP and RAFT techniques and investigation of their performance in emulsion polymerization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1724-1733. [PMID: 19928970 DOI: 10.1021/la9037809] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We reported herein the synthesis of poly(methacrylic acid)-b-poly(butyl acrylate) (PMAA-b-PBA) block copolymers (surfmers) and their performance as novel polymerizable macrosurfactants in emulsion polymerization. The surfmers bearing terminal unsaturated carbon-carbon double bonds were first successfully designed and sythesized via catalytic chain transfer polymerization (CCTP) and radical addition-fragmentation polymerization (RAFT) techniques. The structures of surfmers were characterized by Raman spectra, nuclear magnetic resonance ((1)H NMR), and gel permeation chromatography (GPC). The critical micelle concentration of surfmers was determined. Subsequently, the surfmers were used as emulsifier to prepare polyacrylate latexes (PA-surf). The influence of the surfmer concentration as well as PMAA and PBA chain segment ratios of surfmer on their performance in emulsion polymerization was discussed thoroughly. The particle size, amount of coagulum, and stability against electrolyte solutions of the latexes were evaluated. Also, the relations between monomer conversion in emulsion polymerization, polymerization rate, emulsion particle size, surface tension, and reaction time were investigated, which showed some interesting information for the probable mechanism underlying this emulsion polymerization system. Atomic force microscopy (AFM) and attenuated total reflection Fourier transform infrared spectra (ATR FT-IR) were performed to investigate the surface morphology and component distribution of the latex films. The results show high efficiency of these surfmers in emulsion polymerization, suggesting that the resultant PMAA-b-PBA block copolymers act not only as the emulsifier but also as the stabilizer of monomer droplets as well as the so-called comonomer.
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Affiliation(s)
- Li Chen
- State Key Laboratory of Material-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China
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27
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Tang E, Zhao Y, Li G. Fabrication and apparent kinetic study of poly(methyl methacrylate)/poly(octyl acrylate) and poly(octyl acrylate)/poly(methyl methacrylate) latex interpenetrating polymer networks. J Appl Polym Sci 2010. [DOI: 10.1002/app.31821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Chronopoulou L, Fratoddi I, Palocci C, Venditti I, Russo MV. Osmosis based method drives the self-assembly of polymeric chains into micro- and nanostructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:11940-11946. [PMID: 19572495 DOI: 10.1021/la9016382] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Polymers derived from monomers with a variety of functionalities provide materials with a vast range of properties and applications. Worldwide research has recently developed a wide number of methods suitable for the preparation of polymeric materials of nanometric dimensions, in view of the fact that, at the nanoscale level, new and unexpected properties emerge and lead to innovative applications. In this framework, we have exploited an easy method for the generation of nanostructures, regardless of the chemical structure of the pristine amorphous polymers, that is, biopolymers (e.g., polysaccharides) and synthetic, functional, and structural polymers (i.e, polystyrene, polymethylmethacrylates, polyacetylenes, and polymetallaynes). The nanostructure of these macromolecules, considered as the prototypes of various classes of polymeric materials, was achieved by using a simple and versatile procedure based on an osmotic method (OBM). Depending on the choice of solvent/nonsolvent pairs, the dialysis membrane molecular weight cutoff (MWCO), temperature, and polymer concentration, different morphologies can be obtained (e.g., spheres, sponges, disks, and fibers); also, a tuning of the nanoparticle dimensions ranging from the micro- to nanoscale has been obtained.
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Affiliation(s)
- Laura Chronopoulou
- Department of Chemistry, University of Rome La Sapienza, P.le A. Moro 5, Rome 00185, Italy
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29
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Tang L, Jin J, Zhang S, Mao Y, Sun J, Yuan W, Zhao H, Xu H, Qin A, Tang BZ. Detection of the critical micelle concentration of cationic and anionic surfactants based on aggregation-induced emission property of hexaphenylsilole derivatives. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s11426-009-0119-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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30
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Liu J, Lam JWY, Tang BZ. Aggregation-induced Emission of Silole Molecules and Polymers: Fundamental and Applications. J Inorg Organomet Polym Mater 2009. [DOI: 10.1007/s10904-009-9282-8] [Citation(s) in RCA: 245] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Er Y, Barnes TJ, Fornasiero D, Prestidge CA. The encapsulation and release of guanosine from PEGylated liposomes. J Liposome Res 2009; 19:29-36. [DOI: 10.1080/08982100802673940] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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32
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Tang E, Tian B, Fu C. Apparent kinetic study of latex interpenetrating polymer networks P(ethyl acrylate)/P(styrene) and P(styrene)/P (ethyl acrylate) by two stage emulsion polymerization. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2008.09.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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33
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The Emulsion Polymerization of Each of Vinyl Acetate and Butyl Acrylate Monomers Using bis (2-ethylhexyl) Maleate for Improving the Physicomechanical Properties of Paints and Adhesive Films. INT J POLYM SCI 2009. [DOI: 10.1155/2009/731971] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Improving the water sensitivity of polyvinyl acetate PVAc films as well as pressure sensitivity, adhesion and washability of polybutyl acrylate were achieved by using bis (2-ethylhexyl) maleate (BEHM). The emulsion polymerization kinetics of vinyl acetate and butyl acrylate in presence of BEHM was studied. The order of the polymerization reaction with respect to the BEHM in presence of each of vinyl acetate and butyl acrylate was studied. The physicomechanical properties of the polyvinyl acetate films and vinyl acetate-butyl acrylate copolymer films were studied in presence of BEHM and the obtained results were matched with those prepared in the presence of pluronic F 108 and showed superior values. The obtained mean average molecular weights were found to be smaller in presence of BEHM assuring the presence of chain transfer reaction.
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34
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Shaffei KA. The first study of the effect of surfmer backbone structure on the stability and the course of emulsion polymerization of methyl methacrylate and butyl acrylate monomers. J Appl Polym Sci 2008. [DOI: 10.1002/app.27278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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de Lathouder KM, Smeltink MW, Straathof AJJ, Paasman MA, van de Sandt EJAX, Kapteijn F, Moulijn JA. Hydrogel coated monoliths for enzymatic hydrolysis of penicillin G. J Ind Microbiol Biotechnol 2008; 35:815-24. [PMID: 18427849 PMCID: PMC2493519 DOI: 10.1007/s10295-008-0353-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2007] [Revised: 03/19/2008] [Accepted: 04/04/2008] [Indexed: 11/27/2022]
Abstract
The objective of this work was to develop a hydrogel-coated monolith for the entrapment of penicillin G acylase (E. coli, PGA). After screening of different hydrogels, chitosan was chosen as the carrier material for the preparation of monolithic biocatalysts. This protocol leads to active immobilized biocatalysts for the enzymatic hydrolysis of penicillin G (PenG). The monolithic biocatalyst was tested in a monolith loop reactor (MLR) and compared with conventional reactor systems using free PGA, and a commercially available immobilized PGA. The optimal immobilization protocol was found to be 5 g l−1 PGA, 1% chitosan, 1.1% glutaraldehyde and pH 7. Final PGA loading on glass plates was 29 mg ml−1 gel. For 400 cpsi monoliths, the final PGA loading on functionalized monoliths was 36 mg ml−1 gel. The observed volumetric reaction rate in the MLR was 0.79 mol s−1 m−3monolith. Apart from an initial drop in activity due to wash out of PGA at higher ionic strength, no decrease in activity was observed after five subsequent activity test runs. The storage stability of the biocatalysts is at least a month without loss of activity. Although the monolithic biocatalyst as used in the MLR is still outperformed by the current industrial catalyst (immobilized preparation of PGA, 4.5 mol s−1 m−3catalyst), the rate per gel volume is slightly higher for monolithic catalysts. Good activity and improved mechanical strength make the monolithic bioreactor an interesting alternative that deserves further investigation for this application. Although moderate internal diffusion limitations have been observed inside the gel beads and in the gel layer on the monolith channel, this is not the main reason for the large differences in reactor performance that were observed. The pH drop over the reactor as a result of the chosen method for pH control results in a decreased performance of both the MLR and the packed bed reactor compared to the batch system. A different reactor configuration including an optimal pH profile is required to increase the reactor performance. The monolithic stirrer reactor would be an interesting alternative to improve the performance of the monolith-PGA combination.
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Affiliation(s)
- K M de Lathouder
- Faculty of Applied Sciences, DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL, Delft, The Netherlands.
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36
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Tajima A, Higuchi T, Yabu H, Shimomura M. Hemispherical polymer nano-particles of polyisoprene–poly(methyl methacrylate) blend with core–shell structure. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.04.148] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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37
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Ramirez JC, Herrera-Ordonez J. Kinetic aspects of styrene minisuspension polymerization using a mixture PVA–SDS as stabilizer: Effect of the time of addition of SDS. Eur Polym J 2007. [DOI: 10.1016/j.eurpolymj.2007.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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38
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Murase T, Sato S, Fujita M. Nanometer-Sized Shell Molecules That Confine Endohedral Polymerizing Units. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200603561] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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39
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Murase T, Sato S, Fujita M. Nanometer-Sized Shell Molecules That Confine Endohedral Polymerizing Units. Angew Chem Int Ed Engl 2007; 46:1083-5. [PMID: 17205586 DOI: 10.1002/anie.200603561] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Takashi Murase
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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40
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41
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Castelvetro V, De Vita C, Giannini G, Giaiacopi S. Role of anionic and nonionic surfactants on the control of particle size and latex colloidal stability in the seeded emulsion polymerization of butyl methacrylate. J Appl Polym Sci 2006. [DOI: 10.1002/app.23717] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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D'Amato R, Venditti I, Russo MV, Falconieri M. Growth control and long-range self-assembly of poly(methyl methacrylate) nanospheres. J Appl Polym Sci 2006. [DOI: 10.1002/app.24823] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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43
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Synthesis of exfoliated acrylonitrile–butadiene–styrene copolymer (ABS) clay nanocomposites: role of clay as a colloidal stabilizer. POLYMER 2005. [DOI: 10.1016/j.polymer.2004.09.036] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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44
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Boutti S, Graillat C, McKenna T. A look at surfactant partitioning in polymeric latexes using conductivity measurements. Eur Polym J 2004. [DOI: 10.1016/j.eurpolymj.2004.07.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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45
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Sun J, Velamakanni BV, Gerberich WW, Francis LF. Aqueous latex/ceramic nanoparticle dispersions: colloidal stability and coating properties. J Colloid Interface Sci 2004; 280:387-99. [PMID: 15533412 DOI: 10.1016/j.jcis.2004.08.014] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2004] [Accepted: 08/04/2004] [Indexed: 11/29/2022]
Abstract
The effect of pH on the colloidal stability of aqueous dispersions containing antimony-doped tin oxide (ATO) or indium tin oxide (ITO) nanoparticles and poly(vinyl acetate-acrylic) copolymer (PVAc-co-acrylic) latex particles was investigated using experimental observations and Derjiaguin, Landau, Verwey and Overbeek (DLVO) theory. The microstructure, electrical properties and optical properties of composite coatings prepared from various dispersions were also studied. Zeta potential measurements revealed that the isoelectric point (IEP) of ATO nanoparticles was below pH 2.0, that of ITO nanoparticles was at pH approximately 6.0 and that of PVAc-co-acrylic latex was at pH approximately 2.0. ATO/PVAc-co-acrylic dispersions prepared at pH 3 were stable, but those prepared at pH 1.5 formed aggregates, which settled quickly with time. DLVO theory predictions are in accord with these results. Stable ITO/PVAc-co-acrylic dispersions are obtained at a pH of 3.0 and 11.0, but dispersions are not stable at a pH of 6.0, the IEP of ITO. At a pH of 3.0, DLVO results predict attraction between ITO particles and latex particles. Dispersion pH affected the microstructures and properties of ATO (or ITO)/PVAc-co-acrylic coatings. Suspensions that formed aggregates produced coatings with lower percolation thresholds and lower transparencies than those produced from stable suspensions.
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Affiliation(s)
- Jiakuan Sun
- Department of Chemical Engineering and Materials Science, University of Minnesota, 151 Amundson Hall, 421 Washington Avenue SE, Minneapolis, MN 55455, USA
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46
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Aramendia E, Barandiaran MJ, De La Cal JC, Grade J, Blease T, Asua JM. Incorporation of a new alkenyl-based nonionic surfmer into acrylic latexes. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pola.20259] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Aramendia E, Barandiaran MJ, Asua JM. On the optimal surfmer addition profile in emulsion polymerisation. CR CHIM 2003. [DOI: 10.1016/j.crci.2003.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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48
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On the inverse miniemulsion copolymerization and terpolymerization of acrylamide, N, N′-methylenebis(acrylamide) and methacrylic acid. OPEN CHEM 2003. [DOI: 10.2478/bf02476230] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractThe kinetics of free-radical copolymerization and terpolymerization of acrylamide (AAm), N, N′-methylenebis(acrylamide) (MBA) and methacrylic acid (MA) in the inverse water/monomer/cyclohexane/Tween 85 miniemulsion was investigated. Polymerizable sterically-stable miniemulsions were formulated in cyclohexane as a continuous medium. Polymerizations are very fast and reach the final conversion within several minutes. The dependence of the polymerization rate vs. conversion is described by a curve with two nonstationary rate intervals. The maximum rate of polymerization slightly increases with increasing concentration of crosslinking monomer (MBA) and strongly decreases by the addition of MA. The rate of polymerization is inversely proportional to the 0.9th and 1.8th power of the particle concentration without and with MA, respectively. The number of polymer particles is inversely proportional to the 0.18th and 0.13th power of MBA concentration. The kinetic and colloidal parameters of the miniemulsion polymerization are discussed in terms of microemulsion polymerization model.
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49
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50
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Capek I, Chudej J, Jan�?kov� S. Sterically stabilized emulsion polymerization of styrene: Pseudo-semicontinuous approach. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/pola.10627] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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