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Gazzotti S, Adolfsson KH, Hakkarainen M, Farina H, Silvani A, Ortenzi MA. DOX mediated synthesis of PLA-co-PS graft copolymers with matrix-driven self-assembly in PLA-based blends. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111157] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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2
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Liu Y, Bai S, Wu T, Chen CC, Liu Y, Chao X, Bai Y. Dendronized Arm Snowflake Polymer as a Highly Branched Scaffold for Cellular Imaging and Delivery. Biomacromolecules 2021; 22:3791-3799. [PMID: 34339173 DOI: 10.1021/acs.biomac.1c00631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Incorporation of branched structures is a major pathway to build macromolecules with desired three-dimensional (3D) structures, which are of high importance in the rational design of functional polymeric scaffolds. Dendrimers and hyperbranched polymers have been extensively studied for this purpose, but proper gain-of-function for these structures usually requires large enough molecular weights and a highly branched interior so that a spherical 3D core-shell architecture can be obtained, yet it is generally challenging to achieve precise control over the structure, high molecular weight, and high degree of branching (DoB) simultaneously. In this article, we present a set of snowflake-shaped star polymers with functional cores and dendronized arms, which ensure a high DoB and an overall globular conformation, thus facilitating the introduction of functional moieties onto the easily achieved scaffold without the need for high-generation dendrons. Using a polyglycerol dendron (PGD) as a proof of concept, we propose that this dendronized arm snowflake polymer (DASP) structure can serve as a better performing alternative to high-generation PGDs. DASPs with molecular weights of 750, 1220, 2120, and 3740 kDa were prepared with >85% yields in all cases, and we show that these DASPs have high encapsulating efficiency of Nile Red due to their high DoB and high biocompatibility due to their hydroxyl-rich nature after ketal removal, as well as high cell permeability that is molecular-weight-dependent. Introduced fluorophores such as fluorescein and difluoroboron 1,3-diphenylaminophenyl β-diketonate with suitable excitation wavelengths may turn the DASPs into stable, endosome-staining fluorophores with ultra-large Stokes shifts, narrowed emission bands, and suitability for long-term cellular tracing. Moreover, the scaffold can encapsulate antibiotic molecules and deliver them into phagolysosomes for efficient elimination of intracellular Staphylococcus aureus, which is insensitive toward many antibiotics but is a key target for the clinical success of methicillin-resistant Staphylococcus aureus infection treatment. Elimination of Staphylococcus aureus could be improved to >99.9% for chloramphenicol at 32 μg/mL with 450 μg/mL DASP.
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Affiliation(s)
- Yanhong Liu
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Silei Bai
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Tong Wu
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Chun-Chi Chen
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, Hubei 430062, China
| | - Ying Liu
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Xiangyu Chao
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yugang Bai
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
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Abstract
Bottlebrush polymers (BBPs), composed of relatively short polymeric side chains densely grafted on a polymer backbone, exhibit many unique characteristics and hold promise for a variety of applications. This Perspective focuses on environmentally induced shape-changing behavior of BBPs at interface and in solution, particularly worm/star-globule shape transitions. While BBPs with a single type of homopolymer or random copolymer side chains have been shown to undergo pronounced worm-to-globule shape changes in response to external stimuli, the collapsed brushes are unstable and prone to aggregation. By introducing a second, solvophilic polymer into the side chains, either as a distinct type of side chain or as the outer block of block copolymer side chains, the collapsed brushes not only are stabilized but also create unimolecular micellar nanostructures, which can be used for, e.g., encapsulation and delivery of substances. The current challenges in the design, synthesis, and characterization of stimuli-responsive shape-changing BBPs are discussed.
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Affiliation(s)
- Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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Kent EW, Lewoczko EM, Zhao B. Effect of Buffer Anions on Pearl-Necklace Morphology of Tertiary Amine-Containing Binary Heterografted Linear Molecular Bottlebrushes in Acidic Aqueous Buffers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:13320-13330. [PMID: 33135416 DOI: 10.1021/acs.langmuir.0c02435] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Molecular bottlebrushes can exhibit a multitude of distinct conformations under different conditions, and precise control of their morphology can facilitate better use of such materials in potential applications. Herein, we report a study on the effect of buffer anions on the pearl-necklace morphology of linear binary heterografted molecular brushes consisting of pH-responsive poly(2-N,N-diethylamino)ethyl methacrylate) (PDEAEMA) with a pKa of 7.40 and thermoresponsive poly(ethoxydi(ethylene glycol) acrylate) (PDEGEA) with a lower critical solution temperature of 9 °C as side chains in various acidic aqueous buffers at 0 °C. The molecular brushes, denotated as BMB, were prepared by a grafting-to approach using copper(I)-catalyzed azide-alkyne cycloaddition reaction. Dynamic light scattering studies showed that the apparent hydrodynamic size of BMB in aqueous buffers with a pH of 6.50 at 1 °C decreased with increasing valency of buffer anions, from acetate anions with a charge of 1-, to phosphate anions carrying charges of 2- and 1- and citrate anions bearing charges of 3- and 2- at pH = 6.50. Atomic force microscopy revealed that BMB exhibited a pearl-necklace morphology from all three aqueous buffers with a pH of 6.50 when spin-cast at 0 °C. Analysis of AFM images showed that the average length of BMB and the number of beads per brush molecule decreased with increasing valency of buffer anions while the size and height of the beads increased. The pearl-necklace morphology of BMB was believed to be the result of microphase separation of the neutral PDEGEA and the charged PDEAEMA side chains along the brush backbone. Multivalent kosmotropic buffer anions formed bridging linkages between protonated tertiary amine moieties and thus "crosslinked" the charged PDEAEMA side chains, resulting in the shrinkage of BMB and enhanced microphase separation of two side chain polymers.
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Affiliation(s)
- Ethan W Kent
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Evan M Lewoczko
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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6
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Computer simulations of comb-like macromolecules with responsive diblock copolymer side chains. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04753-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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7
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Zhang Y, Xi S, Parambathu AV, Chapman WG. Density functional study of one- and two-component bottlebrush molecules in solvents of varying quality. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1767812] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yuchong Zhang
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, USA
| | - Shun Xi
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, USA
| | | | - Walter G. Chapman
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, USA
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8
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Lu Y, Lin J, Wang L, Zhang L, Cai C. Self-Assembly of Copolymer Micelles: Higher-Level Assembly for Constructing Hierarchical Structure. Chem Rev 2020; 120:4111-4140. [DOI: 10.1021/acs.chemrev.9b00774] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yingqing Lu
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jiaping Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Liquan Wang
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Liangshun Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chunhua Cai
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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9
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Ivanova AS, Mikhailov IV, Polotsky AA, Darinskii AA, Birshtein TM, Borisov OV. Cascades of unfolding transitions in amphiphilic molecular brushes. J Chem Phys 2020; 152:081101. [DOI: 10.1063/1.5144295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Anna S. Ivanova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Ivan V. Mikhailov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Alexey A. Polotsky
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Anatoly A. Darinskii
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Tatiana M. Birshtein
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Oleg V. Borisov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004 St. Petersburg, Russia
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux, UMR 5254 CNRS UPPA, 64053 Pau, France
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10
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Wessels MG, Jayaraman A. Self-assembly of amphiphilic polymers of varying architectures near attractive surfaces. SOFT MATTER 2020; 16:623-633. [PMID: 31808757 DOI: 10.1039/c9sm02104c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We use coarse-grained molecular dynamics simulations to investigate the assembly of A-B amphiphilic polymers near/on surfaces as a function of polymer architecture and surface attraction to the solvophobic B-block in the polymer. We study four polymer architectures: linear, bottlebrush with a backbone that is longer than each of the side chains, bottlebrush where the solvophobic backbone is similar in length to each of the side chains, and 'star-like' architectures where the backbone is significantly shorter than the side chain lengths. For each architecture and surface-B attraction, we quantify the assembled aggregate structure (i.e., aggregation number, domain shapes and sizes) and the chain conformations (i.e., components of the chain radius of gyration) on and away from the surface. For all the architectures and surface-B attraction strengths, the assembled structure away from the surface is similar to the assembly observed in bulk systems without surfaces. Near/on the surface, the assembled B-blocks form domains whose shapes and sizes are dependent on the surface-B attraction strength and the ability of the B-block in the polymer architecture to change conformations and pack on the surface. Domain sizes formed from linear and 'star-like' polymer architectures show the highest sensitivity to surface-B-block attraction strength, transitioning from hemispherical to disordered domains with increasing attraction strength. In contrast, bottlebrushes with long backbones and short side chains transition from hemispherical to striped to continuous domains with increasing surface-B attraction strength. Bottlebrushes with similar solvophobic backbone and side chain lengths form hemispherical domains that do not change significantly with the surface-B-block attraction strength. These computational results can guide experimentalists in their choices of surface chemistry and polymer architecture to achieve desired assembled domain shapes and sizes on the surface.
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Affiliation(s)
- Michiel G Wessels
- Colburn Laboratory, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA.
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11
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Wessels MG, Jayaraman A. Molecular dynamics simulation study of linear, bottlebrush, and star-like amphiphilic block polymer assembly in solution. SOFT MATTER 2019; 15:3987-3998. [PMID: 31025695 DOI: 10.1039/c9sm00375d] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this study we investigate the effect of varying branched polymer architectures on the assembly of amphiphilic block polymers in solution using coarse-grained molecular dynamics simulations. We quantify assembly structure (e.g., aggregation number, assembly morphology, and micelle core size) and thermodynamics (e.g., unimer to micelle transition conditions) as a function of increasing solvophobicity of the solvophobic block in the copolymer for three broad categories of polymer architectures: linear, 'bottlebrush' (with many short side chains on a long backbone), and 'star-like' (with few long side chains on a short backbone). Keeping the total number of coarse-grained beads in each polymer (or polymer molecular weight) constant, as we go from either linear or 'star-like' to 'bottlebrush' polymer architectures, the micelle aggregation number and micelle core size decrease, and the solvophobicity required for assembly (i.e., transition solvophobicity) increases. This trend is linked to the topological/steric hinderance for making solvophobic bead contacts between neighboring polymers for the 'bottlebrush' polymer architecture compared to the linear or 'star-like' architectures. We are able to identify some universal trends in assembly by plotting the assembly structure and thermodynamics data as a function of branching parameter defined as the ratio of the branched chain to the linear chain radius of gyration in the unimer state, and the relative lengths of the backbone versus side chain. The results in this paper guide how one could manipulate the amphiphilic block polymer assembly structure and thermodynamics by choosing appropriate polymer architecture, block sequence, and composition.
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Affiliation(s)
- Michiel G Wessels
- Colburn Laboratory, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA.
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12
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Lyubimov I, Wessels MG, Jayaraman A. Molecular Dynamics Simulation and PRISM Theory Study of Assembly in Solutions of Amphiphilic Bottlebrush Block Copolymers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01535] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ivan Lyubimov
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
| | - Michiel G. Wessels
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
| | - Arthi Jayaraman
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
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13
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Mo Y, Liu G, Tu Y, Lin S, Song J, Hu J, Liu F. Morphological switching of unimolecular micelles of ternary graft copolymers in different solvents. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28462] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yangmiao Mo
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- The University of the Chinese Academy of Science; Beijing 100039 People's Republic of China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou 510650 People's Republic of China
| | - Guojun Liu
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- The University of the Chinese Academy of Science; Beijing 100039 People's Republic of China
- Department of Chemistry; Queen's University; 90 Bader Lane Kingston Ontario Canada K7L 3N6
| | - Yuanyuan Tu
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou 510650 People's Republic of China
| | - Shudong Lin
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- The University of the Chinese Academy of Science; Beijing 100039 People's Republic of China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou 510650 People's Republic of China
| | - Jun Song
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- The University of the Chinese Academy of Science; Beijing 100039 People's Republic of China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou 510650 People's Republic of China
| | - Jiwen Hu
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- The University of the Chinese Academy of Science; Beijing 100039 People's Republic of China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; Guangzhou 510650 People's Republic of China
| | - Feng Liu
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences; Guangzhou 510650 People's Republic of China
- The University of the Chinese Academy of Science; Beijing 100039 People's Republic of China
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14
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Leuty GM, Tsige M, Grest GS, Rubinstein M. Tension Amplification in Tethered Layers of Bottle-Brush Polymers. Macromolecules 2016; 49:1950-1960. [PMID: 27695137 PMCID: PMC5040463 DOI: 10.1021/acs.macromol.5b02305] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Molecular dynamics simulations of a coarse-grained bead-spring model have been used to study the effects of molecular crowding on the accumulation of tension in the backbone of bottle-brush polymers tethered to a flat substrate. The number of bottle-brushes per unit surface area, Σ, as well as the lengths of the bottle-brush backbones Nbb (50 ≤ Nbb ≤ 200) and side chains Nsc (50 ≤ Nsc ≤ 200) were varied to determine how the dimensions and degree of crowding of bottle-brushes give rise to bond tension amplification along the backbone, especially near the substrate. From these simulations, we have identified three separate regimes of tension. For low Σ, the tension is due solely to intramolecular interactions and is dominated by the side chain repulsion that governs the lateral brush dimensions. With increasing Σ, the interactions between bottle-brush polymers induce compression of the side chains, transmitting increasing tension to the backbone. For large Σ, intermolecular side chain repulsion increases, forcing side chain extension and reorientation in the direction normal to the surface and transmitting considerable tension to the backbone.
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Affiliation(s)
- Gary M. Leuty
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Mesfin Tsige
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Gary S. Grest
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Michael Rubinstein
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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15
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Lísal M, Limpouchová Z, Procházka K. The self-assembly of copolymers with one hydrophobic and one polyelectrolyte block in aqueous media: a dissipative particle dynamics study. Phys Chem Chem Phys 2016; 18:16127-36. [DOI: 10.1039/c6cp00341a] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reversible self-assembly of copolymers with one hydrophobic and one polyelectrolyte block.
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Affiliation(s)
- Martin Lísal
- Laboratory of Aerosols Chemistry and Physics
- Institute of Chemical Process Fundamentals of the CAS
- v. v. i
- 165 02 Prague 6-Suchdol
- Czech Republic
| | - Zuzana Limpouchová
- Department of Physical and Macromolecular Chemistry
- Faculty of Science
- Charles University in Prague
- 128 40 Prague 2
- Czech Republic
| | - Karel Procházka
- Department of Physical and Macromolecular Chemistry
- Faculty of Science
- Charles University in Prague
- 128 40 Prague 2
- Czech Republic
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Wang Y, Wang J, Wang T, Xu Y, Shi L, Wu Y, Li L, Guo X. Pod-Like Supramicelles with Multicompartment Hydrophobic Cores Prepared by Self-Assembly of Modified Chitosan. NANO-MICRO LETTERS 2015; 8:151-156. [PMID: 30460275 PMCID: PMC6223668 DOI: 10.1007/s40820-015-0070-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 10/07/2015] [Indexed: 05/29/2023]
Abstract
In this paper, pod-like supramicelles with multicompartment hydrophobic cores were prepared by self-assembly of amphiphilic N-phthaloylchitosan-g-poly(N-vinylcaprolactam) (PHCS-g-PNVCL) in aqueous medium. The employed biocompatible amphiphilic polymer was synthesized by grafting the carboxyl terminated poly(N-vinylcaprolactam) (PNVCL-COOH) chains onto N-phthaloylchitosan (PHCS) backbone. 1H NMR and FTIR results confirmed the molecular structure of the copolymers. The morphology of the supramicelles assembled by PHCS-g-PNVCL was revealed by means of TEM and polarized light microscope. In solution, the supramicelles were very stable as monitored by DLS and zeta potential measurements. Temperature and pH presented significant influences on the size and size distribution of the supramicelles. These supramicelles with multicompartment hydrophobic cores should be ideal biomimetic systems with promising applications in drug delivery.
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Affiliation(s)
- Yiming Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237 People’s Republic of China
| | - Jie Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237 People’s Republic of China
| | - Tongshuai Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237 People’s Republic of China
| | - Yisheng Xu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237 People’s Republic of China
| | - Lei Shi
- Firmenich Aromatics (China) Co., Ltd., Shanghai, 201108 People’s Republic of China
| | - Yongtao Wu
- Firmenich Aromatics (China) Co., Ltd., Shanghai, 201108 People’s Republic of China
| | - Li Li
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237 People’s Republic of China
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237 People’s Republic of China
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17
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Angelescu DG, Linse P. Branched-linear polyion complexes investigated by Monte Carlo simulations. SOFT MATTER 2014; 10:6047-6058. [PMID: 24999910 DOI: 10.1039/c4sm01055h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Complexes formed by one charged and branched copolymer with an oppositely charged and linear polyion have been investigated by Monte Carlo simulations. A coarse-grained description has been used, in which the main chain of the branched polyion and the linear polyion possess the same absolute charge and charge density. The spatial extension and other structural properties, such as bond-angle orientational correlation function, asphericity, and scaling analysis of formed complexes, at varying branching density and side-chain length of the branched polyion, have been explored. In particular, the balance between cohesive Coulomb attraction and side-chain repulsions resulted in two main structures of a polyion complex. These structures are (i) a globular polyion core surrounded by side chains appearing at low branching density and (ii) an extended polyion core with side chains still being expelled at high branching density. The globule-to-extended transition occurred at a crossover branching density being practically independent of the side chain length.
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Affiliation(s)
- Daniel G Angelescu
- Romanian Academy, "Ilie Murgulescu" Institute of Physical Chemistry, Splaiul Independentei 202, 060021 Bucharest, Romania.
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18
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Yakimansky AV, Meleshko TK, Ilgach DM, Bauman MA, Anan'eva TD, Klapshina LG, Lermontova SA, Balalaeva IV, Douglas WE. Novel regular polyimide-graft
-(polymethacrylic acid) brushes: Synthesis and possible applications as nanocontainers of cyanoporphyrazine agents for photodynamic therapy. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26846] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alexander V. Yakimansky
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoi pr. 31, St. Petersburg 199004 Russia
| | - Tamara K. Meleshko
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoi pr. 31, St. Petersburg 199004 Russia
| | - Dmitrii M. Ilgach
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoi pr. 31, St. Petersburg 199004 Russia
| | - Maria A. Bauman
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoi pr. 31, St. Petersburg 199004 Russia
| | - Tatiana D. Anan'eva
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoi pr. 31, St. Petersburg 199004 Russia
| | - Larisa G. Klapshina
- G. A. Razuvaev Institute of Organometallic Chemistry; Russian Academy of Sciences; Tropinin Street 49, GSP-445 Nizhny Novgorod 603600 Russia
| | - Svetlana A. Lermontova
- G. A. Razuvaev Institute of Organometallic Chemistry; Russian Academy of Sciences; Tropinin Street 49, GSP-445 Nizhny Novgorod 603600 Russia
| | - Irina V. Balalaeva
- Research Institute of Living Systems; Lobachevsky State University of Nizhny Novgorod; Gagarin pr. 23/1, GSP-20 Nizhny Novgorod 603950 Russia
| | - William E. Douglas
- CNRS UMR 5253; Université Montpellier II; Place E. Bataillon 34095 Montpellier cedex 5 France
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Backbone-collapsed intra- and inter-molecular self-assembly of cellulose-based dense graft copolymer. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.12.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Coil-to-rod conformational transition and single chain structure of graft copolymer by tuning the graft density. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.01.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Popov KI, Palyulin VV, Möller M, Khokhlov AR, Potemkin II. Surface induced self-organization of comb-like macromolecules. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2011; 2:569-84. [PMID: 22003463 PMCID: PMC3190627 DOI: 10.3762/bjnano.2.61] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Accepted: 07/01/2011] [Indexed: 05/23/2023]
Abstract
We present a review of the theoretical and experimental evidence for the peculiar properties of comb copolymers, demonstrating the uniqueness of these materials among other polymer architectures. These special properties include an increase in stiffness upon increasing side-chain length, the spontaneous curvature of adsorbed combs, rod-globule transition, and specific intramolecular self-assembly. We also propose a theory of chemically heterogeneous surface nanopattern formation in ultrathin films of comblike macromolecules containing two different types (A and B) of incompatible side chains (so-called binary combs). Side chains of the binary combs are strongly adsorbed on a surface and segregated with respect to the backbone. The thickness of surface domains formed by the B side chains is controlled by the interaction with the substrate. We predict the stability of direct and inverse disc-, torus- and stripelike nanostructures. Phase diagrams of the film are constructed.
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Affiliation(s)
- Konstantin I Popov
- Physics Department, Moscow State University, Moscow 119991, Russian Federation
| | - Vladimir V Palyulin
- Physics Department, Moscow State University, Moscow 119991, Russian Federation
- Institute of Polymer Science, University of Ulm, 89069 Ulm, Germany
| | - Martin Möller
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen and DWI at the RWTH Aachen e.V., 52056 Aachen, Germany
| | - Alexei R Khokhlov
- Physics Department, Moscow State University, Moscow 119991, Russian Federation
- Institute of Polymer Science, University of Ulm, 89069 Ulm, Germany
| | - Igor I Potemkin
- Physics Department, Moscow State University, Moscow 119991, Russian Federation
- Institute of Polymer Science, University of Ulm, 89069 Ulm, Germany
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22
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Gallyamov MO. Scanning Force Microscopy as Applied to Conformational Studies in Macromolecular Research. Macromol Rapid Commun 2011; 32:1210-46. [DOI: 10.1002/marc.201100150] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Revised: 04/06/2011] [Indexed: 01/17/2023]
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Theodorakis PE, Paul W, Binder K. Analysis of the cluster formation in two-component cylindrical bottle-brush polymers under poor solvent conditions: a simulation study. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2011; 34:52. [PMID: 21607832 DOI: 10.1140/epje/i2011-11052-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 05/09/2011] [Indexed: 05/30/2023]
Abstract
Two-component bottle-brush polymers, where flexible side chains containing N = 20, 35 and 50 effective monomers are grafted alternatingly to a rigid backbone, are studied by Molecular Dynamics simulations, varying the grafting density [Formula: see text] and the solvent quality. Whereas for poor solvents and large enough [Formula: see text] the molecular brush is a cylindrical object with monomers of different type occupying locally the two different halves of the cylinder, for intermediate values of [Formula: see text] an axially inhomogeneous structure of "pearl-necklace" type is formed, where microphase separation between monomers of different type within a cluster takes place. These "pearls" have a strongly non-spherical ellipsoidal shape, due to the fact that several side chains cluster together in one "pearl". We discuss the resulting structures in detail and we present a comparison with the single-component bottle-brush case.
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Affiliation(s)
- P E Theodorakis
- Institut für Physik, Johannes Gutenberg-Universität, Mainz, Germany.
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Carrillo JMY, Dobrynin AV. Molecular dynamics simulations of grafted layers of bottle-brush polyelectrolytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:18374-18381. [PMID: 21033760 DOI: 10.1021/la103229u] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Using molecular dynamics simulations, we study the effect of the brush grafting density and degree of polymerization of the side chains on conformations of brush layers made of charged bottle-brush macromolecules. The thickness of the brush layer first decreases with increasing brush grafting density; then, it saturates and remains constant in the wide interval of the brush grafting densities. The brush layers consisting of the bottle-brush macromolecules with longer side chains have a larger layer thickness. The elongation of the side chains of the bottle-brush macromolecules decreases with increasing brush grafting density. This contraction of the side chains is due to counterion condensation inside the volume occupied by bottle-brushes. Our simulations showed that counterion condensation is a multiscale process reflecting different symmetries of the bottle-brush layer.
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Affiliation(s)
- Jan-Michael Y Carrillo
- Polymer Program, Institute of Materials Science and Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
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Cao Q, Zuo C, Li L, Zhang N. Conformational Behavior of Bottle-Brush Polyelectrolytes with Charged and Neutral Side Chains. MACROMOL THEOR SIMUL 2010. [DOI: 10.1002/mats.200900088] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Stepánek M, Kosovan P, Procházka K, Janata M, Netopilík M, Plestil J, Slouf M. Self-assembly of poly(4-methylstyrene)-g-poly(methacrylic acid) graft copolymer in selective solvents for grafts: scattering and molecular dynamics simulation study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:9289-9296. [PMID: 20232838 DOI: 10.1021/la1001682] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Poly(4-methylstyrene)-g-poly(methacrylic acid) (P4MS-g-PMAA) graft copolymer was synthesized by the grafting-onto method from poly(4-methylstyrene), selectively brominated on methyl groups, and "living" poly(tert-butyl methacrylate). The average degree of polymerization of the backbone and the grafts and the average number of grafts per backbone were 251, 21, and 25, respectively. The self-assembly of P4MS-g-PMAA was studied in methanol and aqueous buffers (selective solvents for grafts). Micelles of P4MS-g-PMAA in methanol were studied by a combination of static and dynamic light scattering, TEM and SAXS. It was found that their spherical core/shell morphology resembles that of diblock copolymer micelles but they have a very low aggregation number (approximately 3) and a high cmc (approximately 0.8 mg/mL). The spherical core-shell structure revealed by SAXS was confirmed by the molecular dynamics study emulating an associate of comblike copolymers with structural parameters close to those of the experimentally studied system. Because P4MS-g-PMAA was not directly soluble in water, its aqueous solutions had to be prepared by dialysis of the methanolic solutions. In aqueous solutions, unlike in methanol, small P4MS-g-PMAA micelles (approximately 20 nm in diameter) form large secondary aggregates (approximately 100-400 nm).
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Affiliation(s)
- Miroslav Stepánek
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic.
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Interpolyelectrolyte Complexes Based on Polyionic Species of Branched Topology. SELF ORGANIZED NANOSTRUCTURES OF AMPHIPHILIC BLOCK COPOLYMERS I 2010. [DOI: 10.1007/12_2010_102] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Košovan P, Kuldová J, Limpouchová Z, Procházka K, Zhulina EB, Borisov OV. Amphiphilic Graft Copolymers in Selective Solvents: Molecular Dynamics Simulations and Scaling Theory. Macromolecules 2009. [DOI: 10.1021/ma900768p] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter Košovan
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43 Prague, Czech Republic
| | - Jitka Kuldová
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43 Prague, Czech Republic
| | - Zuzana Limpouchová
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43 Prague, Czech Republic
| | - Karel Procházka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43 Prague, Czech Republic
| | - Ekaterina B. Zhulina
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Oleg V. Borisov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
- Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, UMR 5254, UPPA CNRS, 64053, Pau, France
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Walther A, Yuan J, Abetz V, Müller AHE. Structure-tunable bidirectional hybrid nanowires via multicompartment cylinders. NANO LETTERS 2009; 9:2026-2030. [PMID: 19341261 DOI: 10.1021/nl9002975] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present structure-tunable bidirectional inorganic-organic hybrid nanowires templated by soft multicompartment cylinders, possessing perfectly parallel compartments. The poly(2-vinylpyridine) compartments are used to bind nanoparticles via supramolecular coordination. The resulting hybrid nanowires are tunable in terms of the distribution of the inorganics in the corona. The two limiting cases are (a) perfectly aligned, parallel nanowires and (b) nanowires with one homogeneous corona. This approach demonstrates how advances in polymer architectures can be used to create novel hybrid materials of unprecedented complexity and very desirable architecture.
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Affiliation(s)
- Andreas Walther
- Makromolekulare Chemie II and Bayreuther Zentrum für Kolloide and Grenzflächen, Universität Bayreuth, D-95440 Bayreuth, Germany.
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Yan LT, Zhang X. Dissipative particle dynamics simulations of complexes comprised of cylindrical polyelectrolyte brushes and oppositely charged linear polyelectrolytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:3808-3813. [PMID: 19708154 DOI: 10.1021/la803825x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Dissipative particle dynamics (DPD) approach is used to investigate the conformational behaviors and interactions of the complex between a cylindrical polyelectrolyte brush (CPB) and linear polyelectrolytes (LPs) with opposite charges. The effective complex between CPB and LPs and its dependence on the amount and length of LPs are examined. It is found that the CPB conformation presents collapse and reswelling with the increasing amount of LPs. The collapse is caused by the replacement of monovalent CPB counterions by LPs and the condensation of LPs on the CPB which reduce the osmotic pressure inside the brush. The swelling of the collapsed CPB is induced by the excluded volume effects of additionally absorbed LPs and LP counterions. The results show that the addition of LPs can not enhance the effective complex between the CPB and LPs when the total charge of LPs exceeds that of CPB. Our simulation also demonstrates that the increase of the LP length leads to a shrinking of the CPB which consequently exhibits rod-like or spherical conformations. The most effective complex between a CPB and LPs can be reached only when the contour length of LPs is not less than that of the CPB side chain.
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Affiliation(s)
- Li-Tang Yan
- Physikalische Chemie II, Universität Bayreuth, D-95440 Bayreuth, Germany
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Yan LT, Xu Y, Ballauff M, Müller AHE, Böker A. Influence of Counterion Valency on the Conformational Behavior of Cylindrical Polyelectrolyte Brushes. J Phys Chem B 2009; 113:5104-10. [DOI: 10.1021/jp810648z] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li-Tang Yan
- Physikalische Chemie II, Makromolekulare Chemie II, Physikalische Chemie I, and Bayreuther Zentrum für Kolloide and Grenzflächen, DWI an der RWTH Aachen e.V. and Lehrstuhl für Makromolekulare Materialien and Oberflächen, RWTH Aachen University, 52056 Aachen, Germany
| | - Youyong Xu
- Physikalische Chemie II, Makromolekulare Chemie II, Physikalische Chemie I, and Bayreuther Zentrum für Kolloide and Grenzflächen, DWI an der RWTH Aachen e.V. and Lehrstuhl für Makromolekulare Materialien and Oberflächen, RWTH Aachen University, 52056 Aachen, Germany
| | - Matthias Ballauff
- Physikalische Chemie II, Makromolekulare Chemie II, Physikalische Chemie I, and Bayreuther Zentrum für Kolloide and Grenzflächen, DWI an der RWTH Aachen e.V. and Lehrstuhl für Makromolekulare Materialien and Oberflächen, RWTH Aachen University, 52056 Aachen, Germany
| | - Axel H. E. Müller
- Physikalische Chemie II, Makromolekulare Chemie II, Physikalische Chemie I, and Bayreuther Zentrum für Kolloide and Grenzflächen, DWI an der RWTH Aachen e.V. and Lehrstuhl für Makromolekulare Materialien and Oberflächen, RWTH Aachen University, 52056 Aachen, Germany
| | - Alexander Böker
- Physikalische Chemie II, Makromolekulare Chemie II, Physikalische Chemie I, and Bayreuther Zentrum für Kolloide and Grenzflächen, DWI an der RWTH Aachen e.V. and Lehrstuhl für Makromolekulare Materialien and Oberflächen, RWTH Aachen University, 52056 Aachen, Germany
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34
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Xu Y, Bolisetty S, Ballauff M, Müller AHE. Switching the Morphologies of Cylindrical Polycation Brushes by Ionic and Supramolecular Inclusion Complexes. J Am Chem Soc 2009; 131:1640-1. [DOI: 10.1021/ja807302j] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Youyong Xu
- Makromolekulare Chemie II, Physikalische Chemie I, and Bayreuther Zentrum für Kolloide and Grenzflächen, Universität Bayreuth, D-954440 Bayreuth, Germany
| | - Sreenath Bolisetty
- Makromolekulare Chemie II, Physikalische Chemie I, and Bayreuther Zentrum für Kolloide and Grenzflächen, Universität Bayreuth, D-954440 Bayreuth, Germany
| | - Matthias Ballauff
- Makromolekulare Chemie II, Physikalische Chemie I, and Bayreuther Zentrum für Kolloide and Grenzflächen, Universität Bayreuth, D-954440 Bayreuth, Germany
| | - Axel H. E. Müller
- Makromolekulare Chemie II, Physikalische Chemie I, and Bayreuther Zentrum für Kolloide and Grenzflächen, Universität Bayreuth, D-954440 Bayreuth, Germany
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