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Mérai L, Deák Á, Dékány I, Janovák L. Fundamentals and utilization of solid/ liquid phase boundary interactions on functional surfaces. Adv Colloid Interface Sci 2022; 303:102657. [PMID: 35364433 DOI: 10.1016/j.cis.2022.102657] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/23/2022] [Accepted: 03/24/2022] [Indexed: 12/16/2022]
Abstract
The affinity of macroscopic solid surfaces or dispersed nano- and bioparticles towards liquids plays a key role in many areas from fluid transport to interactions of the cells with phase boundaries. Forces between solid interfaces in water become especially important when the surface texture or particles are in the colloidal size range. Although, solid-liquid interactions are still prioritized subjects of materials science and therefore are extensively studied, the related literature still lacks in conclusive approaches, which involve as much information on fundamental aspects as on recent experimental findings related to influencing the wetting and other wetting-related properties and applications of different surfaces. The aim of this review is to fill this gap by shedding light on the mechanism-of-action and design principles of different, state-of-the-art functional macroscopic surfaces, ranging from self-cleaning, photoreactive or antimicrobial coatings to emulsion separation membranes, as these surfaces are gaining distinguished attention during the ongoing global environmental and epidemic crises. As there are increasing numbers of examples for stimulus-responsive surfaces and their interactions with liquids in the literature, as well, this overview also covers different external stimulus-responsive systems, regarding their mechanistic principles and application possibilities.
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3
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Zhang L, Zhang Z, Wang W, Tabet A, Hanson S, Zhang L, Zhu D, Wang C. Polymer-Based Dual-Responsive Self-Emulsifying Nanodroplets as Potential Carriers for Poorly Soluble Drugs. ACS APPLIED BIO MATERIALS 2021; 4:4441-4449. [PMID: 35006856 DOI: 10.1021/acsabm.1c00194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A biodegradable amphiphilic liquid polymer was designed to form self-emulsifying nanodroplets in water for delivering poorly soluble drugs. The polymer was composed of multiple short blocks of poly(ethylene glycol) (PEG) and poly(caprolactone) (PCL) connected through acid-labile acetal linkages. With an overall average molecular weight of over 18 kDa, the polymer remained as a viscous liquid under room and physiological temperatures. Dispersing the polymer in an aqueous buffer gave rise to highly stable micelle-like nanodroplets with an average size of approximately 15-20 nm. The nanodroplet dispersions underwent reversible temperature-sensitive aggregation with cloud points ranging from 45 to 50 °C, depending on polymer concentration. Nuclear magnetic resonance (NMR) and dynamic light scattering analyses revealed that while the nanodroplets were stable at pH 7.4 for several days, hydrolysis of the acetal linkages in the polymer backbone was much accelerated under mildly acidic pH 5.0, resulting in the formation of large microdroplets. Nile red (NR), a poorly water-soluble fluorophore, can be solubilized in the nanodroplets, and efficient intracellular delivery of NR was achieved. The hydrophobic indocyanine green (ICG) was also encapsulated in the nanodroplets. Near-infrared (NIR) fluorescence imaging and in vivo biocompatibility of the ICG-loaded nanodroplets were demonstrated in mice. In summary, the self-emulsifying nanodroplets of amphiphilic liquid polymer would be a promising material system for poorly soluble drug delivery and imaging in vivo.
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Affiliation(s)
- Li Zhang
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China
| | - Zhiming Zhang
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China
| | - Wenshou Wang
- Department of Biomedical Engineering, University of Minnesota, 7-116 Hasselmo Hall, 312 Church Street S.E., Minneapolis, Minnesota 55455, United States
| | - Anthony Tabet
- Department of Biomedical Engineering, University of Minnesota, 7-116 Hasselmo Hall, 312 Church Street S.E., Minneapolis, Minnesota 55455, United States
| | - Samuel Hanson
- Department of Biomedical Engineering, University of Minnesota, 7-116 Hasselmo Hall, 312 Church Street S.E., Minneapolis, Minnesota 55455, United States
| | - Linhua Zhang
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China
| | - Dunwan Zhu
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China
| | - Chun Wang
- Department of Biomedical Engineering, University of Minnesota, 7-116 Hasselmo Hall, 312 Church Street S.E., Minneapolis, Minnesota 55455, United States
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Wang K, Liu Q, Lu G, Zhang Y, Zhou Y, Chen S, Ma Q, Liu G, Zeng Y. Acid-Labile Temperature-Responsive Homopolymers and a Diblock Copolymer Bearing the Pendent Acetal Group. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ke Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Qi Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Ganghui Lu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Yi Zhang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Yuanhong Zhou
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Siqi Chen
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Qian Ma
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Guiyan Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Yongfei Zeng
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
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Nordendorf G, Schafforz SL, Käkel EB, Miao S, Lorenz A. Surface grafted agents with various molecular lengths and photochemically active benzophenone moieties. Phys Chem Chem Phys 2020; 22:1774-1783. [DOI: 10.1039/c9cp05722f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Homologues of benzophenone silane, a covalently graftable, photochemically active surface functionalizing agent, are investigated as surface functionalization agents for both small particles and planar substrates.
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Affiliation(s)
- Gaby Nordendorf
- Department of Chemistry
- Paderborn University
- 33098 Paderborn
- Germany
| | | | - Eireen B. Käkel
- Institute of Chemistry
- University of Kassel
- 34132 Kassel
- Germany
| | - Shunyi Miao
- Department of Chemistry
- Paderborn University
- 33098 Paderborn
- Germany
| | - Alexander Lorenz
- Department of Chemistry
- Paderborn University
- 33098 Paderborn
- Germany
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Abstract
Amino-functional polyethers have emerged as a new class of “smart”, i.e. pH- and thermoresponsive materials. This review article summarizes the synthesis and applications of these materials, obtained from ring-opening of suitable epoxide monomers.
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Affiliation(s)
- Patrick Verkoyen
- Department of Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - Holger Frey
- Department of Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
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Deng M, Guo F, Li Y, Hou Z. Synthesis of alkynyl-functionalized linear and star polyethers by aluminium-catalyzed copolymerization of glycidyl 3-butynyl ether with epichlorohydrin and ethylene oxide. Polym Chem 2019. [DOI: 10.1039/c8py01829d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel family of alkynyl-functional linear and star polyethers were prepared by the copolymerization of glycidyl 3-butynyl ether, ethylene oxide and epichlorohydrin catalyzed by i-Bu3Al/H3PO4/DBU.
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Affiliation(s)
- Ming Deng
- State Key Laboratory of Fine Chemicals
- Department of Polymer Science and Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
| | - Fang Guo
- State Key Laboratory of Fine Chemicals
- Department of Polymer Science and Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
| | - Yang Li
- State Key Laboratory of Fine Chemicals
- Department of Polymer Science and Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals
- Department of Polymer Science and Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
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Gallei M, Rüttiger C. Recent Trends in Metallopolymer Design: Redox-Controlled Surfaces, Porous Membranes, and Switchable Optical Materials Using Ferrocene-Containing Polymers. Chemistry 2018; 24:10006-10021. [PMID: 29532972 DOI: 10.1002/chem.201800412] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/06/2018] [Indexed: 01/24/2023]
Abstract
Metallopolymers with metal functionalities are a unique class of functional materials. Their redox-mediated optoelectronic and catalytic switching capabilities, their outstanding structure formation and separation capabilities have been reported recently. Within this Minireview, the scope and limitations of intriguing ferrocene-containing systems will be discussed. In the first section recent advances in metallopolymer design will be given leading to a plethora of novel metallopolymer architectures. Discussed synthetic pathways comprise controlled and living polymerization protocols as well as surface immobilization strategies. In the following sections, we focus on recent advances and new applications for side-chain and main-chain ferrocene-containing polymers as (i) remote-switchable materials, (ii) smart surfaces, (iii) redox-responsive membranes, and some recent trends in (iv) photonic structures and (v) other optical applications.
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Affiliation(s)
- Markus Gallei
- Ernst-Berl Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Christian Rüttiger
- Ernst-Berl Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
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Huang D, Zhang Q, Deng Y, Luo Z, Li B, Shen X, Qi Z, Dong S, Ge Y, Chen W. Polymeric crown ethers: LCST behavior in water and stimuli-responsiveness. Polym Chem 2018. [DOI: 10.1039/c8py00412a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A crown ether-functionalized poly(vinyl alcohol) (PVA) system shows lower critical solution temperature (LCST) phase separation behavior in water.
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Yu L, Hou Y, Cheng C, Schlaich C, Noeske PLM, Wei Q, Haag R. High-Antifouling Polymer Brush Coatings on Nonpolar Surfaces via Adsorption-Cross-Linking Strategy. ACS APPLIED MATERIALS & INTERFACES 2017; 9:44281-44292. [PMID: 29188709 DOI: 10.1021/acsami.7b13515] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new "adsorption-cross-linking" technology is presented to generate a highly dense polymer brush coating on various nonpolar substrates, including the most inert and low-energy surfaces of poly(dimethylsiloxane) and poly(tetrafluoroethylene). This prospective surface modification strategy is based on a tailored bifunctional amphiphilic block copolymer with benzophenone units as the hydrophobic anchor/chemical cross-linker and terminal azide groups for in situ postmodification. The resulting polymer brushes exhibited long-term and ultralow protein adsorption and cell adhesion benefiting from the high density and high hydration ability of polyglycerol blocks. The presented antifouling brushes provided a highly stable and robust bioinert background for biospecific adsorption of desired proteins and bacteria after secondary modification with bioactive ligands, e.g., mannose for selective ConA and Escherichia coli binding.
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Affiliation(s)
- Leixiao Yu
- Institute of Chemistry and Biochemistry, Freie Universität Berlin , Takustr. 3, 14195 Berlin, Germany
| | - Yong Hou
- Institute of Chemistry and Biochemistry, Freie Universität Berlin , Takustr. 3, 14195 Berlin, Germany
| | - Chong Cheng
- Institute of Chemistry and Biochemistry, Freie Universität Berlin , Takustr. 3, 14195 Berlin, Germany
| | - Christoph Schlaich
- Institute of Chemistry and Biochemistry, Freie Universität Berlin , Takustr. 3, 14195 Berlin, Germany
| | - Paul-Ludwig Michael Noeske
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM , Wiener Str. 12, 28359 Bremen, Germany
| | - Qiang Wei
- Institute of Chemistry and Biochemistry, Freie Universität Berlin , Takustr. 3, 14195 Berlin, Germany
- Department of Cellular Biophysics, Max-Planck Institute for Medical Research, Heidelberg , Heisenbergstr. 3, 70569 Stuttgart, Germany
- Multifunctional Biomaterials for Medicine, Helmholtz Virtual Institute , Kantstr. 55, 14513 Teltow-Seehof, Germany
| | - Rainer Haag
- Institute of Chemistry and Biochemistry, Freie Universität Berlin , Takustr. 3, 14195 Berlin, Germany
- Multifunctional Biomaterials for Medicine, Helmholtz Virtual Institute , Kantstr. 55, 14513 Teltow-Seehof, Germany
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Gan L, Suchand Sangeeth C, Yuan L, Jańczewski D, Song J, Nijhuis CA. Tuning charge transport across junctions of ferrocene-containing polymer brushes on ITO by controlling the brush thickness and the tether lengths. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.10.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Alkan A, Gleede T, Wurm FR. Ruthenocenyl Glycidyl Ether: A Ruthenium-Containing Epoxide for Anionic Polymerization. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00278] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Arda Alkan
- Max Planck Institute for Polymer Research (MPIP), Ackermannweg 10, 55128 Mainz, Germany
| | - Tassilo Gleede
- Max Planck Institute for Polymer Research (MPIP), Ackermannweg 10, 55128 Mainz, Germany
| | - Frederik R. Wurm
- Max Planck Institute for Polymer Research (MPIP), Ackermannweg 10, 55128 Mainz, Germany
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Qin C, Feng Y, An H, Han J, Cao C, Feng W. Tetracarboxylated Azobenzene/Polymer Supramolecular Assemblies as High-Performance Multiresponsive Actuators. ACS APPLIED MATERIALS & INTERFACES 2017; 9:4066-4073. [PMID: 28079357 DOI: 10.1021/acsami.6b15075] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Multistimuli-responsive polymers are materials of emerging interest but synthetically challenging. In this work, supramolecular assembly was employed as a facile and effective approach for constructing 3,3',5,5'-azobenzenetetracarboxylic acid (H4abtc)/poly(diallyldimethylammonium chloride) (PDAC) supramolecules. Structural transformations of H4abtc can be induced by light, mechanical force, and heat and influenced by free volume. Thus, the fabricated free-standing H4abtc/PDAC film underwent bending/unbending movements upon treatment with light, humidity, or temperature, as asymmetric structural transformations on either side of the film generated asymmetric contraction/stretching forces. Fast rates of shape recovery were achieved for the film on exposure to gently flowing humid nitrogen. The bending/unbending motions are controllable, reversible, and repeatable. Hence, this light-, humido-, and thermo-responsive film has great potential in device applications for advanced functions.
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Affiliation(s)
- Chengqun Qin
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, P. R China
| | - Yiyu Feng
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, P. R China
- Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin 300072, P. R China
- Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, P. R China
| | - Haoran An
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, P. R China
| | - Junkai Han
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, P. R China
| | - Chen Cao
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, P. R China
| | - Wei Feng
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, P. R China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R China
- Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin 300072, P. R China
- Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, P. R China
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Alkan A, Wald S, Louage B, De Geest BG, Landfester K, Wurm FR. Amphiphilic Ferrocene-Containing PEG Block Copolymers as Micellar Nanocarriers and Smart Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:272-279. [PMID: 27958755 DOI: 10.1021/acs.langmuir.6b03917] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An important and usually the only function of most surfactants in heterophase systems is stabilizing one phase in another, for example, droplets or particles in water. Surfactants with additional chemical or physical handles are promising in controlling the colloidal properties by external stimuli. The redox stimulus is an attractive feature; however, to date only a few ionic redox-responsive surfactants have been reported. Herein, the first nonionic and noncytotoxic ferrocene-containing block copolymers are prepared, carrying a hydrophilic poly(ethylene glycol) (PEG) chain and multiple ferrocenes in the hydrophobic segment. These amphiphiles were studied as redox-sensitive surfactants that destabilize particles as obtained in miniemulsion polymerization. Because of the nonionic nature of such PEG-based copolymers, they can stabilize nanoparticles even after the addition of ions, whereas particles stabilized with ionic surfactants would be destabilized by the addition of salt. The redox-active surfactants were prepared by the anionic ring-opening polymerization of ferrocenyl glycidyl ether, with PEG monomethyl ether as the macroinitiator. The resultant block copolymers with molecular weights (Mn) between 3600 and 8600 g mol-1 and narrow molecular weight distributions (Mw/Mn = 1.04-1.10) were investigated via 1H nuclear magnetic resonance and diffusion ordered spectroscopy, size exclusion chromatography, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Furthermore, the block copolymers were used as building blocks for redox-responsive micelles and as redox-responsive surfactants in radical polymerization in miniemulsion to stabilize model polystyrene nanoparticles. Oxidation of iron to the ferrocenium species converted the amphiphilic block copolymers into double hydrophilic macromolecules, which led to the destabilization of the nanoparticles. This destabilization of nanoparticle dispersions may be useful for the formation of coatings and the recovery of surfactants.
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Affiliation(s)
- Arda Alkan
- Max-Planck-Institut für Polymerforschung (MPIP) , Ackermannweg 10, 55128 Mainz, Germany
| | - Sarah Wald
- Max-Planck-Institut für Polymerforschung (MPIP) , Ackermannweg 10, 55128 Mainz, Germany
| | - Benoit Louage
- Department of Pharmaceutics, Ghent University , Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Bruno G De Geest
- Department of Pharmaceutics, Ghent University , Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Katharina Landfester
- Max-Planck-Institut für Polymerforschung (MPIP) , Ackermannweg 10, 55128 Mainz, Germany
| | - Frederik R Wurm
- Max-Planck-Institut für Polymerforschung (MPIP) , Ackermannweg 10, 55128 Mainz, Germany
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15
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Jiang X, Li R, Feng C, Lu G, Huang X. Triple-stimuli-responsive ferrocene-containing homopolymers by RAFT polymerization. Polym Chem 2017. [DOI: 10.1039/c7py00091j] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This article presents a new type of well-defined ferrocene-containing homopolymer obtained from RAFT polymerization, showing pH/CO2 and redox responsiveness.
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Affiliation(s)
- Xue Jiang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Ruru Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Chun Feng
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Guolin Lu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Xiaoyu Huang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
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Lee S, Kim YK, Hong JY, Jang J. Electro-response of MoS2 Nanosheets-Based Smart Fluid with Tailorable Electrical Conductivity. ACS APPLIED MATERIALS & INTERFACES 2016; 8:24221-24229. [PMID: 27552369 DOI: 10.1021/acsami.6b07887] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The correlation between electrical conductivity and electro-responsive behavior is identified by introducing few-layer molybdenum disulfide (MoS2) nanosheets to electrorheological (ER) fluid. Few-layer MoS2 nanosheets are successfully fabricated, with a high yield of above 60%, using a straightforward method, and applied to an electro-responsive smart fluid. The electrical conductivity of MoS2 is easily tunable by adjusting the annealing temperature because of its semiconducting behavior. From an in-depth study on the conductivity-dependent ER behavior of few-layer MoS2 nanosheets, it can be verified that an optimum value of the electrical conductivity exists for the electro-responsive material, corresponding to the Wagner model. To the best of our knowledge, this is the first report on the potential of a transition-metal dichalcogenide as a candidate material for an ER fluid. This study may provide promising approaches for the performance improvement of electro-responsive smart fluids.
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Affiliation(s)
- Seungae Lee
- School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , Seoul 151-742, Korea
| | - Yun Ki Kim
- School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , Seoul 151-742, Korea
| | - Jin-Yong Hong
- School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , Seoul 151-742, Korea
| | - Jyongsik Jang
- School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , Seoul 151-742, Korea
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17
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Alkan A, Wurm FR. Water-Soluble Metallocene-Containing Polymers. Macromol Rapid Commun 2016; 37:1482-93. [DOI: 10.1002/marc.201600205] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 05/31/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Arda Alkan
- Max Planck Institute for Polymer Research (MPIP); Ackermannweg 10 55128 Mainz Germany
| | - Frederik R. Wurm
- Max Planck Institute for Polymer Research (MPIP); Ackermannweg 10 55128 Mainz Germany
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18
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Tang Z, Wilson P, Kempe K, Chen H, Haddleton DM. Reversible Regulation of Thermoresponsive Property of Dithiomaleimide-Containing Copolymers via Sequential Thiol Exchange Reactions. ACS Macro Lett 2016; 5:709-713. [PMID: 35614659 DOI: 10.1021/acsmacrolett.6b00310] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The facile and efficient functionalization of thermoresponsive polymers based on sequential, reversible thiol-exchange reactions is reported. Well-defined dithiomaleimide-containing polymers have been synthesized via Cu(0)-mediated SET-LRP and characterized by 1H NMR and size exclusion chromatography (SEC). The resulting thermosensitive copolymers were subsequently reacted with various thiols to demonstrate the applicability of the strategy, and the thiol-exchange reaction was found to be very fast and efficient. The cloud point of the prepared copolymers can be continually and reversibly tuned, and desirable functionality can be dynamically exchanged upon sequential addition of functional thiol reagents. Through the substitution by thioglucose, an ON-to-OFF switch for fluorescence of the copolymers along with the generation of a glycopolymer was achieved.
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Affiliation(s)
- Zengchao Tang
- Department
of Chemistry, University of Warwick, CV4 7AL Coventry, United Kingdom
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, Jiangsu, PR China
| | - Paul Wilson
- Department
of Chemistry, University of Warwick, CV4 7AL Coventry, United Kingdom
| | - Kristian Kempe
- Department
of Chemistry, University of Warwick, CV4 7AL Coventry, United Kingdom
| | - Hong Chen
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, Jiangsu, PR China
| | - David M. Haddleton
- Department
of Chemistry, University of Warwick, CV4 7AL Coventry, United Kingdom
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, Jiangsu, PR China
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19
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Homann-Müller T, Rieger E, Alkan A, Wurm FR. N-Ferrocenylsulfonyl-2-methylaziridine: the first ferrocene monomer for the anionic (co)polymerization of aziridines. Polym Chem 2016. [DOI: 10.1039/c6py01019a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N-Ferrocenylsulfonyl-2-methylaziridine (fcMAz) is the first aziridine-based monomer functionalized at the sulfonamide and the first organometallic aziridine for the anionic ROP. It was polymerized to homo and copolymers (block or statistical) with adjustable molecular weights.
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Affiliation(s)
| | | | - Arda Alkan
- Max-Planck-Institut für Polymerforschung
- 55128 Mainz
- Germany
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