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Synthesis and self-assembly of polystyrene block polyacrylic acid for sub 10 nm feature size. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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2
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Liu BQ, Xu YH, Liu F, Xie CC, Liang SJ, Chen QM, Li WW. Double-Cable Conjugated Polymers with Fullerene Pendant for Single-Component Organic Solar Cells. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2732-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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3
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Feng G, Tan W, Karuthedath S, Li C, Jiao X, Liu ACY, Venugopal H, Tang Z, Ye L, Laquai F, McNeill CR, Li W. Revealing the Side‐Chain‐Dependent Ordering Transition of Highly Crystalline Double‐Cable Conjugated Polymers. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111192] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Guitao Feng
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 China
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Wenliang Tan
- Department of Materials Science and Engineering Monash University Wellington Road Clayton Victoria 3800 Australia
| | - Safakath Karuthedath
- King Abdullah University of Science and Technology (KAUST) KAUST Solar Center (KSC) Physical Sciences and Engineering Division (PSE) Material Science and Engineering Program (MSE) Thuwal 23955-6900 Kingdom of Saudi Arabia
| | - Cheng Li
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Xuechen Jiao
- Department of Materials Science and Engineering Monash University Wellington Road Clayton Victoria 3800 Australia
| | - Amelia C. Y. Liu
- School of Physics and Astronomy Monash University Wellington Road Clayton Victoria 3800 Australia
| | - Hariprasad Venugopal
- Ramaciotti Centre for Cryo-Electron Microscopy Monash University Clayton Victoria 3800 Australia
| | - Zheng Tang
- Center for Advanced Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China
| | - Long Ye
- School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Tianjin 300350 P. R. China
| | - Frédéric Laquai
- King Abdullah University of Science and Technology (KAUST) KAUST Solar Center (KSC) Physical Sciences and Engineering Division (PSE) Material Science and Engineering Program (MSE) Thuwal 23955-6900 Kingdom of Saudi Arabia
| | - Christopher R. McNeill
- Department of Materials Science and Engineering Monash University Wellington Road Clayton Victoria 3800 Australia
| | - Weiwei Li
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 China
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Feng G, Tan W, Karuthedath S, Li C, Jiao X, Liu ACY, Venugopal H, Tang Z, Ye L, Laquai F, McNeill CR, Li W. Revealing the Side-Chain-Dependent Ordering Transition of Highly Crystalline Double-Cable Conjugated Polymers. Angew Chem Int Ed Engl 2021; 60:25499-25507. [PMID: 34546627 DOI: 10.1002/anie.202111192] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Indexed: 11/06/2022]
Abstract
We developed a series of highly crystalline double-cable conjugated polymers for application in single-component organic solar cells (SCOSCs). These polymers contain conjugated backbones as electron donor and pendant perylene bisimide units (PBIs) as electron acceptor. PBIs are connected to the backbone via alkyl units varying from hexyl (C6 H12 ) to eicosyl (C20 H40 ) as flexible linkers. For double-cable polymers with short linkers, the PBIs tend to stack in a head-to-head fashion, resulting in large d-spacings (e.g. 64 Å for the polymer P12 with C12 H24 linker) along the lamellar stacking direction. When the length of the linker groups is longer than a certain length, the PBIs instead adopt a more ordered packing likely via H-aggregation, resulting in short d-spacings (e.g. 50 Å for the polymer P16 with C16 H32 linker). This work highlights the importance of linker length on the molecular packing of the acceptor units and the influences on the photovoltaic performance of SCOSCs.
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Affiliation(s)
- Guitao Feng
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.,Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Wenliang Tan
- Department of Materials Science and Engineering, Monash University, Wellington Road, Clayton, Victoria, 3800, Australia
| | - Safakath Karuthedath
- King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Physical Sciences and Engineering Division (PSE), Material Science and Engineering Program (MSE), Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Cheng Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Xuechen Jiao
- Department of Materials Science and Engineering, Monash University, Wellington Road, Clayton, Victoria, 3800, Australia
| | - Amelia C Y Liu
- School of Physics and Astronomy, Monash University, Wellington Road, Clayton, Victoria, 3800, Australia
| | - Hariprasad Venugopal
- Ramaciotti Centre for Cryo-Electron Microscopy, Monash University, Clayton, Victoria, 3800, Australia
| | - Zheng Tang
- Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Long Ye
- School of Materials Science and Engineering, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin, 300350, P. R. China
| | - Frédéric Laquai
- King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Physical Sciences and Engineering Division (PSE), Material Science and Engineering Program (MSE), Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Christopher R McNeill
- Department of Materials Science and Engineering, Monash University, Wellington Road, Clayton, Victoria, 3800, Australia
| | - Weiwei Li
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
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Liang S, Jiang X, Xiao C, Li C, Chen Q, Li W. Double-Cable Conjugated Polymers with Pendant Rylene Diimides for Single-Component Organic Solar Cells. Acc Chem Res 2021; 54:2227-2237. [PMID: 33852280 DOI: 10.1021/acs.accounts.1c00070] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
ConspectusConjugated polymers for application in organic solar cells (OSCs) have been developed from poly(phenylenevinylene) to poly(3-hexylthiophene) and then to "donor-acceptor" structures, providing power conversion efficiencies (PCEs) over 18% when blending with the electron acceptor as a two-component photoactive layer. Besides, graft-structural double-cable conjugated polymers that use an electron donor as conjugated backbones and an electron acceptor as pendant side units are one kind of conjugated polymer, in which charge carriers are generated in a single polymer. Therefore, double-cable conjugated polymers can be used as a single photoactive layer in single-component OSCs (SCOSCs). The covalently linked electron donor and acceptor enable double-cable polymers to maintain stable microstructures during long-term operation compared to two-component systems, which is very important for OSCs toward large-area applications. However, SCOSCs based on double-cable conjugated polymers provided PCEs below 3% in a long period, which is lagging far behind PCEs of two-component OSCs. The key reason for this is the limited number of chemical structures and the difficulty to tune the morphology in these polymers.In this Account, we provide an overview about our efforts on developing new double-cable conjugated polymers with rylene diimides as side units, and how to realize high PCEs in SCOSC devices. The studies start from developing a "functionalization-polymerization" method to synthesize the polymers containing rylene diimide acceptors, so that large amounts of double-cable conjugated polymers with distinct physical and electrochemical properties were obtained. Then, we will discuss how to control the nanophase separation in the crystalline region and optimize the miscibility in the amorphous region of double-cable polymers, simultaneously facilitating exciton dissociation and charge transport. With these efforts, a high PCE of 8.4% has been obtained, representing the record PCE in SCOSCs. In addition, the physical process and the stability of SCOSCs will be discussed. We hope that this account will inspire many innovative studies in this field and push the PCEs of SCOSCs to a new stage.
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Affiliation(s)
- Shijie Liang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Xudong Jiang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Chengyi Xiao
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Cheng Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Qiaomei Chen
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Weiwei Li
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, P. R. China
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang 330096, P. R. China
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6
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Raffa P, Wever DAZ, Picchioni F, Broekhuis AA. Polymeric Surfactants: Synthesis, Properties, and Links to Applications. Chem Rev 2015; 115:8504-63. [PMID: 26182291 DOI: 10.1021/cr500129h] [Citation(s) in RCA: 184] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Patrizio Raffa
- Department of Chemical Engineering-Product Technology, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands.,Dutch Polymer Institute DPI , P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Diego Armando Zakarias Wever
- Department of Chemical Engineering-Product Technology, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands.,Dutch Polymer Institute DPI , P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Francesco Picchioni
- Department of Chemical Engineering-Product Technology, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Antonius A Broekhuis
- Department of Chemical Engineering-Product Technology, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
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Charbonneau C, Chassenieux C, Colombani O, Nicolai T. Slow dynamics in transient polyelectrolyte hydrogels formed by self-assembly of block copolymers. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 87:062302. [PMID: 23848670 DOI: 10.1103/physreve.87.062302] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Indexed: 06/02/2023]
Abstract
Transient polyelectrolyte hydrogels were formed by self-assembly of triblock copolyelectrolytes with a central hydrophilic block, poly(acrylic acid) (PAA), and two hydrophobic end blocks, poly(n-butyl acrylate(50%)-stat-acrylic acid(50%)) [P(nBA(50%)-stat-AA(50%))]. The relaxation of the concentration fluctuations was investigated by dynamic light scattering as a function of the concentration, the pH, the temperature, and the ionic strength. A relatively fast mode was observed at all polymer concentrations caused by cooperative diffusion of the polymers. Above the critical percolation concentration a second slow relaxation mode was observed caused by a linear displacement of small heterogeneities in the network with constant velocity. The relative amplitude of the slow mode was determined by the strength of the electrostatic repulsion. The velocity of the displacement in the transient network is shown to be directly correlated to the terminal relaxation time of the shear modulus and has the same Arrhenius temperature dependence. Both the velocity of the displacement and the mechanical relaxation strongly slow down with decreasing degree of ionization below 0.7 and increasing ionic strength above 0.5 M. A ballistic relaxation process has been reported earlier for colloidal gels, and the present study shows that it can also occur in polymeric networks.
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Affiliation(s)
- Céline Charbonneau
- LUNAM Université, Université du Maine, IMMM - UMR CNRS 6283, Département Polymères, Colloïdes, et Interfaces, Université du Maine, avenue O. Messiaen, 72085 Le Mans cedex 9, France
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8
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Muller P, Sudre G, Théodoly O. Wetting transition on hydrophobic surfaces covered by polyelectrolyte brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:9541-9550. [PMID: 18652425 DOI: 10.1021/la801406x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We study the wetting by water of complex "hydrophobic-hydrophilic" surfaces made of a hydrophobic substrate covered by a hydrophilic polymer brush. Polystyrene (PS) substrates covered with polystyrene- block-poly(acrylic acid) PS- b-PAA diblock copolymer layers were fabricated by Langmuir-Schaefer depositions and analyzed by atomic force microscopy (AFM) and ellipsometry. On bare PS substrate, we measured advancing angles theta A = 93 +/- 1 degrees and receding angles theta R = 81 +/- 1 degrees . On PS covered with poorly anchored PS- b-PAA layers, we observed large contact angle hysteresis, theta A approximately 90 degrees and theta R approximately 0 degrees , that we attributed to nanometric scale dewetting of the PS- b-PAA layers. On well-anchored PS- b-PAA layers that form homogeneous PAA brushes, a wetting transition from partial to total wetting occurs versus the amount deposited: both theta A and theta R decrease close to zero. A model is proposed, based on the Young-Dupre equation, that takes into account the interfacial pressure of the brush Pi, which was determined experimentally, and the free energy of hydration of the polyelectrolyte monomers Delta G PAA (hyd), which is the only fitting parameter. With Delta G PAA (hyd) approximately -1300 J/mol, the model renders the wetting transition for all samples and explains why the wetting transition depends mainly on the average thickness of the brush and weakly on the length of PAA chains.
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Affiliation(s)
- P Muller
- Complex Fluids Laboratory, CNRS UMR 166, 350 George Patterson Boulevard, Bristol, Pennsylvania 19007, USA
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9
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Bendejacq DD, Ponsinet V. Double-Polyelectrolyte, Like-Charged Amphiphilic Diblock Copolymers: Swollen Structures and pH- and Salt-Dependent Lyotropic Behavior. J Phys Chem B 2008; 112:7996-8009. [DOI: 10.1021/jp712015h] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Denis D. Bendejacq
- Rhodia Aubervilliers Research and Technological Centre, Consumer Care Laboratory, 52 Rue de la Haie Coq, 93308 Aubervilliers, France, and Université Bordeaux 1, CNRS, Centre de Recherche Paul Pascal UPR 8641, Avenue Schweitzer, 33600 Pessac, France
| | - Virginie Ponsinet
- Rhodia Aubervilliers Research and Technological Centre, Consumer Care Laboratory, 52 Rue de la Haie Coq, 93308 Aubervilliers, France, and Université Bordeaux 1, CNRS, Centre de Recherche Paul Pascal UPR 8641, Avenue Schweitzer, 33600 Pessac, France
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10
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Cristobal G, Berret JF, Chevallier C, Talingting-Pabalan R, Joanicot M, Grillo I. Phase Behavior of Polyelectrolyte Block Copolymers in Mixed Solvents. Macromolecules 2008. [DOI: 10.1021/ma702249w] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Galder Cristobal
- LOF, unité mixte CNRS/Rhodia/Bordeaux-I, 178 avenue du Dr Schweitzer, 33608 Pessac, France; Matière et Systèmes Complexes, UMR 7057 CNRS/Université Denis Diderot, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France; Complex Fluid Laboratory, UMR CNRS/Rhodia 166, CRTB Rhodia Inc., 350 George Patterson Blvd., Bristol, Pennsylvania 19007; and Institut Laue-Langevin, Large Scale Structures, 6 rue Jules Horowitz, B.P. 156, 38042 Grenoble, France
| | - Jean-François Berret
- LOF, unité mixte CNRS/Rhodia/Bordeaux-I, 178 avenue du Dr Schweitzer, 33608 Pessac, France; Matière et Systèmes Complexes, UMR 7057 CNRS/Université Denis Diderot, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France; Complex Fluid Laboratory, UMR CNRS/Rhodia 166, CRTB Rhodia Inc., 350 George Patterson Blvd., Bristol, Pennsylvania 19007; and Institut Laue-Langevin, Large Scale Structures, 6 rue Jules Horowitz, B.P. 156, 38042 Grenoble, France
| | - Cedrick Chevallier
- LOF, unité mixte CNRS/Rhodia/Bordeaux-I, 178 avenue du Dr Schweitzer, 33608 Pessac, France; Matière et Systèmes Complexes, UMR 7057 CNRS/Université Denis Diderot, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France; Complex Fluid Laboratory, UMR CNRS/Rhodia 166, CRTB Rhodia Inc., 350 George Patterson Blvd., Bristol, Pennsylvania 19007; and Institut Laue-Langevin, Large Scale Structures, 6 rue Jules Horowitz, B.P. 156, 38042 Grenoble, France
| | - Ruela Talingting-Pabalan
- LOF, unité mixte CNRS/Rhodia/Bordeaux-I, 178 avenue du Dr Schweitzer, 33608 Pessac, France; Matière et Systèmes Complexes, UMR 7057 CNRS/Université Denis Diderot, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France; Complex Fluid Laboratory, UMR CNRS/Rhodia 166, CRTB Rhodia Inc., 350 George Patterson Blvd., Bristol, Pennsylvania 19007; and Institut Laue-Langevin, Large Scale Structures, 6 rue Jules Horowitz, B.P. 156, 38042 Grenoble, France
| | - Mathieu Joanicot
- LOF, unité mixte CNRS/Rhodia/Bordeaux-I, 178 avenue du Dr Schweitzer, 33608 Pessac, France; Matière et Systèmes Complexes, UMR 7057 CNRS/Université Denis Diderot, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France; Complex Fluid Laboratory, UMR CNRS/Rhodia 166, CRTB Rhodia Inc., 350 George Patterson Blvd., Bristol, Pennsylvania 19007; and Institut Laue-Langevin, Large Scale Structures, 6 rue Jules Horowitz, B.P. 156, 38042 Grenoble, France
| | - Isabelle Grillo
- LOF, unité mixte CNRS/Rhodia/Bordeaux-I, 178 avenue du Dr Schweitzer, 33608 Pessac, France; Matière et Systèmes Complexes, UMR 7057 CNRS/Université Denis Diderot, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France; Complex Fluid Laboratory, UMR CNRS/Rhodia 166, CRTB Rhodia Inc., 350 George Patterson Blvd., Bristol, Pennsylvania 19007; and Institut Laue-Langevin, Large Scale Structures, 6 rue Jules Horowitz, B.P. 156, 38042 Grenoble, France
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INATSUGI T, MATSUDA M, DESTARAC M. Macromolecular Design by Interchange of Xanthate (MADIX)-Background, Design, and Applications. KOBUNSHI RONBUNSHU 2007. [DOI: 10.1295/koron.64.863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Berret JF, Yokota K, Morvan M, Schweins R. Polymer−Nanoparticle Complexes: From Dilute Solution to Solid State. J Phys Chem B 2006; 110:19140-6. [PMID: 17004761 DOI: 10.1021/jp0603177] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report on the formation and the structural properties of "supermicellar" aggregates made from mineral nanoparticles and polyelectrolyte-neutral block copolymers in aqueous solutions. The mineral particles put under scrutiny are ultrafine and positively charged yttrium hydroxyacetate nanoparticles. Combining light, neutron, and X-ray scattering experiments, we have characterized the sizes and the aggregation numbers of the organic-inorganic complexes. We have found that the hybrid aggregates have typical sizes in the range of 100 nm and exhibit a remarkable colloidal stability with respect to ionic strength and concentration variations. Solid films with thicknesses up to several hundreds of micrometers were cast from solutions, resulting in a bulk polymer matrix in which nanoparticle clusters are dispersed and immobilized. It was found in addition that the structure of the complexes remains practically unchanged during film casting.
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Affiliation(s)
- Jean-François Berret
- Matière et Systèmes Complexes, UMR CNRS no. 7057, Université Denis Diderot Paris-VII, 140 rue de Lourmel, 75015 Paris, France.
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Bendejacq DD, Ponsinet V, Joanicot M. Chemically tuned amphiphilic diblock copolymers dispersed in water: from colloids to soluble macromolecules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:1712-1718. [PMID: 15723464 DOI: 10.1021/la048983r] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We investigate by small-angle scattering the structural behavior in water of a family of asymmetric poly(styrene-stat-(acrylic acid))-block-poly(acrylic acid), i.e., P(S-stat-AA)-b-PAA, diblock copolymers. These diblocks are of constant block ratio and increasing molar fraction, phi(AA), ranging from 0 to 1, of acrylic acid in the first P(S-stat-AA) statistical block. We identify three types of structural behavior in water: (i) for phi(AA) </= 0.25, the structures found in water are out-of-equilibrium micelle-like objects, reminiscent of the macrophase separation in the solid state, with no reorganization upon dispersion; (ii) for phi(AA) >/= 0.50, the diblocks dispersions in water are at equilibrium. For high phi(AA), the diblocks are soluble in water, demonstrating that a transition from colloid-like objects to soluble macromolecules is achieved. Close to the transition, (phi(AA) approximately 0.50), the diblocks form objects interpreted as comprising a water-swollen core formed by the P(S-stat-AA) block, surrounded by a swollen brush composed of the majority PAA block, above a apparent critical micelle concentration. However, these diblocks do not behave as macrosurfactants, and their self-association behavior is rather interpreted as a microphase separation which can arise from the incompatibility between two polymer blocks P(S-stat-AA) and PAA placed in a common solvent water.
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Affiliation(s)
- Denis D Bendejacq
- Complex Fluids Laboratory, UMR 166 CNRS/Rhodia, Cranbury, New Jersey 08512, USA
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14
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Shenhar R, Sanyal A, Uzun O, Rotello VM. Anthracene-Functionalized Polystyrene Random Copolymers: Effects of Side-Chain Modification on Polymer Structure and Behavior. Macromolecules 2003. [DOI: 10.1021/ma035488d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Roy Shenhar
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003
| | - Amitav Sanyal
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003
| | - Oktay Uzun
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003
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