1
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Qiu S, Xue H, Wang R, Zhang C, He Q, Chang G, Bu W. Synthesis of platinum(II)-complex end-tethered polymers: spectroscopic properties and nanostructured particles. SOFT MATTER 2023; 19:2891-2901. [PMID: 37039071 DOI: 10.1039/d3sm00247k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Although metal-containing polymers have been widely studied as a novel class of functional soft materials, the microphase separation between polymeric segments and metal-ligand complexes has been less addressed, which is critical to control their structures and functions. To do this, short-chain polystyrenes (PSs) have been end-functionalized with nanosized square-planar platinum(II) complexes. The platinum(II)-comprising polymers were found to show significant luminescence enhancement in chloroform/methanol solvent mixtures upon increasing the methanol composition. By modulating both the PS length and solvent quality, various self-assembled morphologies formed controllably in the mixed solvents and typical examples include nanofibers, nanoellipsoids, and nanospheres. More interestingly, the inside structures of these polymer particles are shown to be lamellar with sub-10 nm spacings, wherein the PS blocks are alternatively aligned with the platinum(II) units. Such a luminescence enhancement and hierarchical nanostructured particles originate from a subtle combination of directional Pt(II)⋯Pt(II) and/or π-π stacking interactions between the platinum(II) units and the solvophobic effect between the PS blocks. This work suggests that by microphase separating polymer chains with nanosized metal-ligand complexes, metal-containing polymers can self-assemble to form sub-10 nm scale nanostructures showcasing desired properties and functions.
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Affiliation(s)
- Shengchao Qiu
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
| | - Hua Xue
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
| | - Ran Wang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
| | - Chi Zhang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
| | - Qun He
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
| | - Guanjun Chang
- State Key Laboratory of Environment-friendly Energy Materials & School of Material Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Weifeng Bu
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
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2
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Septani CM, Kua MF, Chen CY, Lin JM, Sun YS. Micellization, aggregation, and gelation of polystyrene-block-poly(ethylene oxide) in cosolvents added with hydrochloric acid. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Septani CM, Shih O, Yeh YQ, Sun YS. Structural Evolution of a Polystyrene- Block-Poly(Ethylene Oxide) Block Copolymer in Tetrahydrofuran/Water Cosolvents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5987-5995. [PMID: 35507040 DOI: 10.1021/acs.langmuir.2c00041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This study aims to quantitatively investigate the effect of water content on the self-assembly behavior of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) in tetrahydrofuran/water cosolvents by small-angle X-ray scattering. PS-b-PEO chains preferentially form fractal aggregates at a dilute concentration in neat tetrahydrofuran (THF). By adding a small amount of water into THF, PS-b-PEO forms gelled networks. The gelled networks have correlated inhomogeneities, which were generated through mesophase separation. These gelled networks are not present when PS-b-PEO is dissolved in THF/methanol and THF/ethanol cosolvents. The substitution of water with 12 M HCl reduces the viscosity of the gelled networks. Those results indicate that the gelled networks of PS-b-PEO need hydrogen bonds formed from surrounding water molecules to be bridging agents, which connect different PEO block chains together. Upon increasing the water content in THF/water cosolvents, dispersed micelles with a core-shell conformation or aggregated micelles preferentially coexist with fractal aggregates.
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Affiliation(s)
- Cindy Mutiara Septani
- Department of Chemical and Materials Engineering, National Central University, Taoyuan 32001, Taiwan
| | - Orion Shih
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Yi-Qi Yeh
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Ya-Sen Sun
- Department of Chemical and Materials Engineering, National Central University, Taoyuan 32001, Taiwan
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4
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Uddin MA, Yu H, Wang L, Liu J, Mehmood S, Amin BU, Haq F, Liang R, Shen D, Ni Z. Multi-stimuli-responsive performance and morphological changes of radical-functionalized self-assembled micellar nanoaggregates and their multi-triggered drug release. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126807] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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5
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Micellization of Polystyrene- b-Polyglycidol in Dioxane and Water/Dioxane Solutions. Polymers (Basel) 2020; 12:polym12010200. [PMID: 31941035 PMCID: PMC7023586 DOI: 10.3390/polym12010200] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/02/2020] [Accepted: 01/10/2020] [Indexed: 12/29/2022] Open
Abstract
In this work, the self-assembly of a series of amphiphilic polystyrene-b-polyglycidol (PS-b-PGL) diblock copolymers in dioxane and dioxane/water mixtures is presented. The PS-b-PGL have an average degree of polymerization (DP) of PS block equal to 29 units and varied degrees of polymerization for the glycidol segments with DPs of 13, 42, 69 and 117. In dioxane, amphiphilic diblock copolymers form micelles with the hydrophilic PGL placed in the core. Critical micelle concentration (CMC) was determined based on the intensity of scattered light vs. concentration. The micelle size was measured by dynamic light scattering and transmission electron microscopy. Also, the behaviour of the copolymer was studied in water/dioxane solutions by following the changes of scattered light intensity with the addition of water to the system. Critical water content (CWC) of the studied systems decreased as the initial PS-b-PGL concentration in dioxane increased. This process was accompanied by a decrease in the size of aggregate formed. For a given initial copolymer concentration, the size of copolymer aggregates decreased linearly with increasing the length of the PGL block
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6
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Zhang S, Cai C, Xu Z, Lin J, Jin X. Role of High‐Molecular‐Weight Homopolymers on Block Copolymer Self‐Assembly: From Morphology Modifier to Template. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuo Zhang
- Shanghai Key Laboratory of Advanced Polymeric MaterialsSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Chunhua Cai
- Shanghai Key Laboratory of Advanced Polymeric MaterialsSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Zhanwen Xu
- Shanghai Key Laboratory of Advanced Polymeric MaterialsSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Jiaping Lin
- Shanghai Key Laboratory of Advanced Polymeric MaterialsSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Xiao Jin
- Shanghai Key Laboratory of Advanced Polymeric MaterialsSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
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7
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Lv C, Zhang Z, Gao J, Xue J, Li J, Nie J, Xu J, Du B. Self-Assembly of Thermosensitive Amphiphilic Pentablock Terpolymer PNIPAMx-b-PtBA90-b-PPO36-b-PtBA90-b-PNIPAMx in Dilute Aqueous Solution. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01933] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Chao Lv
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhijun Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jia Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jinqiao Xue
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jianyuan Li
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jingjing Nie
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Junting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Binyang Du
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
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8
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Zhou J, Xu H, Tong Z, Yang Y, Jiang G. Photo/pH-controlled host-guest interaction between an azobenzene-containing block copolymer and water-soluble pillar[6]arene as a strategy to construct the "compound vesicles" for controlled drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 89:237-244. [PMID: 29752094 DOI: 10.1016/j.msec.2018.04.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 03/05/2018] [Accepted: 04/09/2018] [Indexed: 12/23/2022]
Abstract
Herein, dual stimuli-responsive compound vesicles were constructed based on host-guest interaction between a water-soluble pillar[6]arene (WP6) and an amphiphilic azobenzene-containing block copolymers (BCP). Reversible morphological transformation between compound vesicles and solid aggregates was achieved by repeated pH- and photo-stimuli. These compound vesicles were then applied in the controlled release of water-soluble anticancer drug, doxorubicin hydrochloride (DOX · HCl). Upon external stimuli, the DOX · HCl displayed a faster release rate than that without stimuli. Moreover, the compound vesicles showed an excellent cytocompatibility toward the human breast cancer cells (Michigan Cancer Foundation-7, MCF-7), and the drug-loaded compound vesicles exhibited lower cytotoxicity than free drug. The drug-loaded compound vesicles could be taken up by MCF-7 cells and can release the DOX · HCl in cancer cells due to the acid environment, which was important for applications in the therapy of cancers as a controlled-release drug carrier.
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Affiliation(s)
- Junyi Zhou
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT), Ministry of Education, Department of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Haian Xu
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT), Ministry of Education, Department of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Zaizai Tong
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT), Ministry of Education, Department of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Yuhui Yang
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT), Ministry of Education, Department of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Guohua Jiang
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT), Ministry of Education, Department of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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9
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Atanase LI, Riess G. Self-Assembly of Block and Graft Copolymers in Organic Solvents: An Overview of Recent Advances. Polymers (Basel) 2018; 10:E62. [PMID: 30966101 PMCID: PMC6414829 DOI: 10.3390/polym10010062] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 01/04/2018] [Accepted: 01/06/2018] [Indexed: 12/31/2022] Open
Abstract
This review is an attempt to update the recent advances in the self-assembly of amphiphilic block and graft copolymers. Their micellization behavior is highlighted for linear AB, ABC triblock terpolymers, and graft structures in non-aqueous selective polar and non-polar solvents, including solvent mixtures and ionic liquids. The micellar characteristics, such as particle size, aggregation number, and morphology, are examined as a function of the copolymers' architecture and molecular characteristics.
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Affiliation(s)
- Leonard Ionut Atanase
- Faculty of Dental Medicine, "Apollonia" University, 700399 Iasi, Romania.
- Research Institute "Academician Ioan Haulica", 700399 Iasi, Romania.
| | - Gerard Riess
- University of Haute Alsace, Ecole Nationale Supérieure de Chimie de Mulhouse, Laboratoire de Photochimie et d'Ingénierie Macromoléculaires, 68093 Mulhouse CEDEX, France.
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10
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Zhong X, Qian Y, Huang J, Yang D, Deng Y, Qiu X. Fabrication of Lignosulfonate Vesicular Reverse Micelles to Immobilize Horseradish Peroxidase. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04939] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaowen Zhong
- School
of Chemistry and Chemical
Engineering, State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Yong Qian
- School
of Chemistry and Chemical
Engineering, State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Jinhao Huang
- School
of Chemistry and Chemical
Engineering, State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Dongjie Yang
- School
of Chemistry and Chemical
Engineering, State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Yonghong Deng
- School
of Chemistry and Chemical
Engineering, State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Xueqing Qiu
- School
of Chemistry and Chemical
Engineering, State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
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11
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Qian Y, Qiu X, Zhong X, Zhang D, Deng Y, Yang D, Zhu S. Lignin Reverse Micelles for UV-Absorbing and High Mechanical Performance Thermoplastics. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b03360] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yong Qian
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Xueqing Qiu
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Xiaowen Zhong
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Delang Zhang
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Yonghong Deng
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Dongjie Yang
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Shiping Zhu
- Department
of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
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12
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Wang CY, Yuan Q, Yang SG, Xu J. Effect of water content on the size and membrane thickness of polystyrene-block-poly(ethylene oxide) vesicles. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1618-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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13
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Tong ZZ, Wang RY, Huang J, Xu JT, Fan ZQ. Regulation of the self-assembly morphology of azobenzene-bearing double hydrophobic block copolymers in aqueous solution by shifting the dynamic host–guest complexation. Polym Chem 2015. [DOI: 10.1039/c5py00004a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The complexation equilibrium between azo and β-CD can be shifted by various methods, thus the micellar morphology of azo-bearing block copolymers is altered.
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Affiliation(s)
- Zai-Zai Tong
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science & Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Rui-Yang Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science & Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Jie Huang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science & Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Jun-Ting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science & Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Zhi-Qiang Fan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science & Engineering
- Zhejiang University
- Hangzhou 310027
- China
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14
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Sheng Y, Yan N, Zhu Y, Jiang W. Online rheological investigation on ion-induced micelle transition for amphiphilic polystyrene-block-poly(acrylic acid) diblock copolymer in dilute solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:15392-15399. [PMID: 25415489 DOI: 10.1021/la503835u] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The ion-induced micellar transition is online-investigated by the time dependence of the viscosity of the solution under shear flow for the first time. During the morphological transition, the change in the micellar structure can be tracked by the change in viscosity. Adding HCl or CaCl2 into pre-prepared spherical micelle solution from the self-assembly of polystyrene-block-poly(acrylic acid) (PS144-b-PAA22) in the N,N-dimethylformamide (DMF)/water mixture, the micellar structures change into short cylinders, long, entangled cylinders, and then lamellae or vesicles, corresponding to the viscosity increasing first and then declining. When HCl or CaCl2 is added to the pre-prepared spherical micelle solution formed by PS144-b-PAA50 in the dioxane/water mixture, the micellar structures are quickly transformed into cylinders or lamellae before carrying out the rheological measurement and then are turned to vesicles or spheres under the shearing, corresponding to a gradual decline in viscosity. This study shows that the rheology can be a very simple and effective online method on the investigation of the micellization, which plays an important role in understanding the micellization mechanism and micellar transition pathway of block copolymers in dilute solution.
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Affiliation(s)
- Yuping Sheng
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun, Jilin 130022, People's Republic of China
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15
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Yu X, Li Y, Dong XH, Yue K, Lin Z, Feng X, Huang M, Zhang WB, Cheng SZD. Giant surfactants based on molecular nanoparticles: Precise synthesis and solution self-assembly. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/polb.23571] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xinfei Yu
- Department of Polymer Science; College of Polymer Science and Polymer Engineering, The University of Akron; Akron Ohio 44325-3909
| | - Yiwen Li
- Department of Polymer Science; College of Polymer Science and Polymer Engineering, The University of Akron; Akron Ohio 44325-3909
| | - Xue-Hui Dong
- Department of Polymer Science; College of Polymer Science and Polymer Engineering, The University of Akron; Akron Ohio 44325-3909
| | - Kan Yue
- Department of Polymer Science; College of Polymer Science and Polymer Engineering, The University of Akron; Akron Ohio 44325-3909
| | - Zhiwei Lin
- Department of Polymer Science; College of Polymer Science and Polymer Engineering, The University of Akron; Akron Ohio 44325-3909
| | - Xueyan Feng
- Department of Polymer Science; College of Polymer Science and Polymer Engineering, The University of Akron; Akron Ohio 44325-3909
| | - Mingjun Huang
- Department of Polymer Science; College of Polymer Science and Polymer Engineering, The University of Akron; Akron Ohio 44325-3909
| | - Wen-Bin Zhang
- Department of Polymer Science; College of Polymer Science and Polymer Engineering, The University of Akron; Akron Ohio 44325-3909
- Department of Polymer Science and Engineering; Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Center for Soft Matter Science and Engineering, Peking University; Beijing 100871 People's Republic of China
| | - Stephen Z. D. Cheng
- Department of Polymer Science; College of Polymer Science and Polymer Engineering, The University of Akron; Akron Ohio 44325-3909
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16
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Ke XX, Wang L, Xu JT, Du BY, Tu YF, Fan ZQ. Effect of local chain deformability on the temperature-induced morphological transitions of polystyrene-b-poly(N-isopropylacrylamide) micelles in aqueous solution. SOFT MATTER 2014; 10:5201-5211. [PMID: 24916798 DOI: 10.1039/c4sm00698d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The effect of temperature on the micellar morphology of two polystyrene-b-poly(N-isopropylacrylamide) (PS-b-PNIPAM) diblock copolymers in an aqueous solution was investigated by dynamic light scattering (DLS) and transmission electron microscopy (TEM). At 25 °C, a mixture of vesicles and spheres are observed for the micelles of PS65-b-PNIPAM108, while PS65-b-PNIPAM360 exhibits mixed cylindrical and spherical micellar morphology. Upon increasing the temperature, the micellar morphology becomes spherical for PS65-b-PNIPAM108 at 60 °C and for PS65-b-PNIPAM360 at 40 °C. Such vesicle-to-sphere and cylinder-to-sphere transitions of micellar morphology are reversible when the micellar solutions are cooled back to 25 °C. However, these temperature-induced morphological transitions of the PS-b-PNIPAM micelles are contrary to the theoretical prediction. Qualitative analysis of the free energy shows that vesicular or cylindrical micelles tend to form at higher temperatures if only the overall volume change of the PNIPAM block is considered. The contradiction between the experimental results and theoretical prediction is interpreted in terms of the local deformability of the PNIPAM chains. At elevated temperatures, the collapsed PNIPAM globules are less deformable and must occupy larger areas at the micellar interface, although the overall volume is smaller at higher temperatures. This will lead to a larger repulsion between the PNIPAM globules and a remarkable increase in the free energy of the corona; thus, the formation of vesicles or cylinders at higher temperatures is prohibited.
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Affiliation(s)
- Xi-Xian Ke
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China.
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17
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Wang L, Huang H, He T. ABC triblock terpolymer self-assembled core-shell-corona nanotubes with high aspect ratios. Macromol Rapid Commun 2014; 35:1387-96. [PMID: 24789700 DOI: 10.1002/marc.201400134] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 04/03/2014] [Indexed: 11/08/2022]
Abstract
Nanotubes have attracted considerable attention due to their unique 1D hollow structure; however, the fabrication of pure nanotubes via block copolymer self-assembly remains a challenge. In this work, the successful preparation of core-shell-corona (CSC) nanotubular micelles with uniform diameter and high aspect ratio is reported, which is achieved via self-assembly of a poly (styrene-b-4-vinyl pyridine-b-ethylene oxide) triblock terpolymer in binary organic solvents with assistance of solution thermal annealing. Via direct visualization of trapped intermediates, the nanotube is believed to be formed via large sphere-large solid cylinderical aggregates-nanotube transformations, wherein the unique solid to hollow transition accompanied with the unidirectional growth is distinct from conventional pathway. In addition, by virtue of the CSC structure, gold nanoparticles are able to be selectively incorporated into different micellar domains of the nanotubes, which may have potential applications in nanoscience and nanotechnology.
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Affiliation(s)
- Lulu Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
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18
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Dan M, Huo F, Xiao X, Su Y, Zhang W. Temperature-Sensitive Nanoparticle-to-Vesicle Transition of ABC Triblock Copolymer Corona–Shell–Core Nanoparticles Synthesized by Seeded Dispersion RAFT Polymerization. Macromolecules 2014. [DOI: 10.1021/ma402370j] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Meihan Dan
- Key Laboratory
of Functional
Polymer Materials of the Ministry of Education, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Institute of
Polymer Chemistry, Nankai University, Tianjin 300071, China
| | - Fei Huo
- Key Laboratory
of Functional
Polymer Materials of the Ministry of Education, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Institute of
Polymer Chemistry, Nankai University, Tianjin 300071, China
| | - Xin Xiao
- Key Laboratory
of Functional
Polymer Materials of the Ministry of Education, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Institute of
Polymer Chemistry, Nankai University, Tianjin 300071, China
| | - Yang Su
- Key Laboratory
of Functional
Polymer Materials of the Ministry of Education, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Institute of
Polymer Chemistry, Nankai University, Tianjin 300071, China
| | - Wangqing Zhang
- Key Laboratory
of Functional
Polymer Materials of the Ministry of Education, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Institute of
Polymer Chemistry, Nankai University, Tianjin 300071, China
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Lund R, Willner L, Richter D, Lindner P, Narayanan T. Kinetic Pathway of the Cylinder-to-Sphere Transition in Block Copolymer Micelles Observed in Situ by Time-Resolved Neutron and Synchrotron Scattering. ACS Macro Lett 2013; 2:1082-1087. [PMID: 35606972 DOI: 10.1021/mz400521p] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Here we present an in situ study of the nonequilibrium cylinder-to-sphere morphological transition kinetics on the millisecond range in a model block copolymer micelle system revealing the underlying mechanism and pathways of the process. By employing the stopped-flow mixing technique, the system was rapidly brought (≈100 μs) deep into the instability region, and the kinetics was followed on the time scale of milliseconds using both time-resolved small-angle neutron and X-ray scattering (TR-SANS and TR-SAXS, respectively). Due to the difference in contrast and resolution, SAXS and SANS provide unique complementary information. Our analysis shows that the morphological transition is characterized by a single rate constant indicating a two-state model where the transition proceeds through direct decomposition (fragmentation) of the cylinders without any transient intermediate structures. The cylindrical segments formed in the disintegration process subsequently grow into spherical micelles possibly through the molecular exchange mechanism until near equilibrium micelles are formed. The observation of a two-step kinetic mechanism, fluctuation-induced fragmentation and ″ripening″ processes, provides unique insight into the nonequilibrium behavior of block copolymer micelles in dilute solutions.
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Affiliation(s)
- Reidar Lund
- Department of Chemistry, University of Oslo, Postboks 1033 Blindern, 0315 Oslo, Norway
| | - Lutz Willner
- Jülich Centre for Neutron Science JCNS and Institute for Complex Systems ICS, Forschungszentrum Jülich
GmbH, 52425 Jülich, Germany
| | - Dieter Richter
- Jülich Centre for Neutron Science JCNS and Institute for Complex Systems ICS, Forschungszentrum Jülich
GmbH, 52425 Jülich, Germany
| | - Peter Lindner
- Institut Laue-Langevin (ILL), F-38042 Grenoble, France
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Yuan W, Liu X, Zou H, Ren J. Environment-induced nanostructural dynamical-change based on supramolecular self-assembly of cyclodextrin and star-shaped poly(ethylene oxide) with polyhedral oligomeric silsesquioxane core. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.08.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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21
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Evans CM, Henderson KJ, Saathoff JD, Shull KR, Torkelson JM. Simultaneous Determination of Critical Micelle Temperature and Micelle Core Glass Transition Temperature of Block Copolymer–Solvent Systems via Pyrene-Label Fluorescence. Macromolecules 2013. [DOI: 10.1021/ma400686j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christopher M. Evans
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Kevin J. Henderson
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Jonathan D. Saathoff
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Kenneth R. Shull
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - John M. Torkelson
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
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Lund R, Willner L, Richter D. Kinetics of Block Copolymer Micelles Studied by Small-Angle Scattering Methods. CONTROLLED POLYMERIZATION AND POLYMERIC STRUCTURES 2013. [DOI: 10.1007/12_2012_204] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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