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Kelly MT, Zhao B. Worm-globule transition of amphiphilic pH-responsive heterografted bottlebrushes at air-water interface. SOFT MATTER 2024; 20:1224-1235. [PMID: 38230501 DOI: 10.1039/d3sm01635h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Heterografted molecular bottlebrushes (MBBs) with side chains composed of poly(n-butyl acrylate) (PnBA) and pH-responsive poly(2-(N,N-diethylamino)ethyl methacrylate) (PDEAEMA, pKa = 7.4) have been shown to be efficient, robust, and responsive emulsifiers. However, it remains unknown how they respond to external stimuli at interfaces. In this work, the shape-changing behavior of six hetero- and homografted MBBs at air-water interfaces in response to pH changes and lateral compression was investigated using a Langmuir-Blodgett trough and atomic force microscopy. At a surface pressure of 0.5 mN m-1, PDEAEMA-containing MBBs showed no worm-globule transitions when the pH was increased from 4.0 to 10.0, at which PDEAEMA becomes insoluble in water. Upon lateral compression at pH 4.0, MBBs with a mole fraction of PDEAEMA side chains (xPDEAEMA) < 0.50 underwent pronounced worm-globule shape transitions; there was an increasing tendency for bottlebrushes to become connected with increasing xPDEAEMA. At xPDEAEMA = 0.76, the molecules remained wormlike even at high compression. These observations were presumably caused by the increased electrostatic repulsion between protonated PDEAEMA side chains in the subphase with increasing xPDEAEMA, hindering the shape change. At pH 10.0, MBBs with xPDEAEMA < 0.50 showed a lower tendency to change their wormlike morphologies upon compression than at pH 4.0. No shape transition was observed when xPDEAEMA > 0.50, attributed to the relatively high affinity toward water and the rigidity of PDEAEMA. This study revealed the shape-changing behavior of amphiphilic pH-responsive MBBs at air-water interfaces, which could be useful for future design of multicomponent MBBs for potential applications.
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Affiliation(s)
- Michael T Kelly
- Department of Chemistry, University of Tennessee, Knoxville, TN 37996, USA.
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, TN 37996, USA.
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2
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Ogbonna N, Dearman M, Cho CT, Bharti B, Peters AJ, Lawrence J. Topologically Precise and Discrete Bottlebrush Polymers: Synthesis, Characterization, and Structure-Property Relationships. JACS AU 2022; 2:898-905. [PMID: 35557765 PMCID: PMC9088296 DOI: 10.1021/jacsau.2c00010] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 05/17/2023]
Abstract
As the complexity of polymer structure grows, so do the challenges for developing an accurate understanding of their structure-property relationships. Here, the synthesis of bottlebrush polymers with topologically precise and fully discrete structures is reported. A key feature of the strategy is the synthesis of discrete macromonomer libraries for their polymerization into topologically precise bottlebrushes that can be separated into discrete bottlebrushes (Đ = 1.0). As the system becomes more discrete, packing efficiency increases, distinct three-phase Langmuir-Blodgett isotherms are observed, and its glass transition temperature becomes responsive to side-chain sequence. Overall, this work presents a versatile strategy to access a range of precision bottlebrush polymers and unravels the impact of side-chain topology on their macroscopic properties. Precise control over side chains opens a pathway for tailoring polymer properties without changing their chemical makeup.
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Affiliation(s)
- Nduka
D. Ogbonna
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
| | - Michael Dearman
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
| | - Cheng-Ta Cho
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
| | - Bhuvnesh Bharti
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
| | - Andrew J. Peters
- Department
of Chemical Engineering, Louisiana Tech
University, Ruston, Louisiana 71272, United States
| | - Jimmy Lawrence
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
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3
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Ogbonna ND, Dearman M, Bharti B, Peters AJ, Lawrence J. Elucidating the impact of side chain dispersity on the assembly of bottlebrush polymers at the
air‐water
interface. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Nduka D. Ogbonna
- Department of Chemical Engineering Louisiana State University Baton Rouge Louisiana USA
| | - Michael Dearman
- Department of Chemical Engineering Louisiana State University Baton Rouge Louisiana USA
| | - Bhuvnesh Bharti
- Department of Chemical Engineering Louisiana State University Baton Rouge Louisiana USA
| | - Andrew J. Peters
- Department of Chemical Engineering Louisiana Tech University Ruston Louisiana USA
| | - Jimmy Lawrence
- Department of Chemical Engineering Louisiana State University Baton Rouge Louisiana USA
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Lee H, Stryutsky AV, Korolovych VF, Mikan E, Shevchenko VV, Tsukruk VV. Transformations of Thermosensitive Hyperbranched Poly(ionic liquid)s Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11809-11820. [PMID: 31418576 DOI: 10.1021/acs.langmuir.9b01905] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We synthesized amphiphilic hyperbranched poly(ionic liquid)s (HBPILs) with asymmetrical peripheral composition consisting of hydrophobic n-octadecylurethane arms and hydrophilic, ionically linked poly(N-isopropylacrylamide) (PNIPAM) macrocations and studied low critical solution temperature (LCST)-induced reorganizations at the air-water interface. We observed that the morphology of HBPIL Langmuir monolayers is controlled by the surface pressure with uniform well-defined disk-like domains formed in a liquid phase. These domains are merged and transformed to uniform monolayers with elevated ridge-like network structures representing coalesced interdomain boundaries in a solid phase because the branched architecture and asymmetrical chemical composition stabilize the disk-like morphology under high compression. Above LCST, elevated individual islands are formed because of the aggregation of the collapsed hydrophobized PNIPAM terminal macrocations in a solid phase. The presence of thermoresponsive PNIPAM macrocations initiates monolayer reorganization at LCST with transformation of surface mechanical contrast distribution. The heterogeneity of elastic response and adhesion distributions for HBPIL monolayers in the wet state changed from highly contrasted two-phase distribution below LCST to near-uniform mechanical response above LCST because of the hydrophilic to hydrophobic transformation of the PNIPAM phase.
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Affiliation(s)
- Hansol Lee
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Alexandr V Stryutsky
- Institute of Macromolecular Chemistry of the National Academy of Sciences of Ukraine , Kyiv 02160 , Ukraine
| | - Volodymyr F Korolovych
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Emily Mikan
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Valery V Shevchenko
- Institute of Macromolecular Chemistry of the National Academy of Sciences of Ukraine , Kyiv 02160 , Ukraine
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
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6
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Pelras T, Mahon CS, Müllner M. Synthese und Anwendung von kompartimentierten molekularen Polymerbürsten. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711878] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Théophile Pelras
- Key Centre for Polymers and Colloids School of Chemistry The University of Sydney Sydney 2006 NSW Australien
- The University of Sydney Nano Institute (Sydney Nano) Sydney 2006 NSW Australien
| | - Clare S. Mahon
- Key Centre for Polymers and Colloids School of Chemistry The University of Sydney Sydney 2006 NSW Australien
- Department of Chemistry University of York Heslington York YO10 5DD Großbritannien
| | - Markus Müllner
- Key Centre for Polymers and Colloids School of Chemistry The University of Sydney Sydney 2006 NSW Australien
- The University of Sydney Nano Institute (Sydney Nano) Sydney 2006 NSW Australien
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7
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Pelras T, Mahon CS, Müllner M. Synthesis and Applications of Compartmentalised Molecular Polymer Brushes. Angew Chem Int Ed Engl 2018; 57:6982-6994. [DOI: 10.1002/anie.201711878] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 01/29/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Théophile Pelras
- Key Centre for Polymers and Colloids, School of Chemistry The University of Sydney Sydney 2006 NSW Australia
- The University of Sydney Nano Institute (Sydney Nano) Sydney 2006 NSW Australia
| | - Clare S. Mahon
- Key Centre for Polymers and Colloids, School of Chemistry The University of Sydney Sydney 2006 NSW Australia
- Department of Chemistry University of York Heslington York YO10 5DD UK
| | - Markus Müllner
- Key Centre for Polymers and Colloids, School of Chemistry The University of Sydney Sydney 2006 NSW Australia
- The University of Sydney Nano Institute (Sydney Nano) Sydney 2006 NSW Australia
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8
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Yildirim I, Weber C, Schubert US. Old meets new: Combination of PLA and RDRP to obtain sophisticated macromolecular architectures. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2017.07.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sarapas JM, Chan EP, Rettner EM, Beers KL. Compressing and Swelling To Study the Structure of Extremely Soft Bottlebrush Networks Prepared by ROMP. Macromolecules 2018; 51:10.1021/acs.macromol.8b00018. [PMID: 38606324 PMCID: PMC11008524 DOI: 10.1021/acs.macromol.8b00018] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
To fully explore bottlebrush polymer networks as potential model materials, a robust and versatile synthetic platform is required. Ring-opening metathesis polymerization is a highly controlled, rapid, and functional group tolerant polymerization technique that has been used extensively for bottlebrush polymer generation but to this point has not been used to synthesize bottlebrush polymer networks. We polymerized a mononorbornene macromonomer and dinorbornene cross-linker (both poly(n-butyl acrylate)) with Grubbs' third-generation catalyst to achieve bottlebrush networks and in turn demonstrated control over network properties as the ratio of macromonomer and cross-linker was varied. Macromonomer to cross-linker ratios ([ MM ] / [ XL ] ) of 10 to 100 were investigated, of which all derivative networks yielded gel fractions over 90%. Because of its amenability toward small samples, contact adhesion testing was used to quantify dry-state shear modulus G , which ranged from 1 to 10 kPa, reinforcing that bottlebrush polymer networks can achieve low moduli in the dry state compared to other polymer network materials through the mitigation of entanglements. A scaling relationship was found such that G ∼ ( [ MM ] / [ XL ] ) - 0.81 , indicating that macromonomer to cross-linker ratio is a good estimator of cross-linking density. The swelling ratio in toluene, Q , was compared to dry-state modulus to test the universal scaling relationship for linear networks G ∼ Q - 1.75 , and a measured exponent of -1.71 indicated good agreement. The synthetic platform outlined here represents a highly flexible route to a myriad of different bottlebrush networks and will increase the accessibility of materials critical to applications ranging from fundamental to biomedical.
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Affiliation(s)
- Joel M. Sarapas
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Edwin P. Chan
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Emma M. Rettner
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Kathryn L. Beers
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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10
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Yamauchi Y, Yamada K, Horimoto NN, Ishida Y. Supramolecular self-assembly of an ABA-Triblock bottlebrush polymer: Atomic-force microscopy visualization of discrete oligomers. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.05.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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11
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Kawamoto K, Zhong M, Gadelrab KR, Cheng LC, Ross CA, Alexander-Katz A, Johnson JA. Graft-through Synthesis and Assembly of Janus Bottlebrush Polymers from A-Branch-B Diblock Macromonomers. J Am Chem Soc 2016; 138:11501-4. [DOI: 10.1021/jacs.6b07670] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ken Kawamoto
- Department of Chemistry and ‡Department of
Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Mingjiang Zhong
- Department of Chemistry and ‡Department of
Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Karim R. Gadelrab
- Department of Chemistry and ‡Department of
Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Li-Chen Cheng
- Department of Chemistry and ‡Department of
Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Caroline A. Ross
- Department of Chemistry and ‡Department of
Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Alfredo Alexander-Katz
- Department of Chemistry and ‡Department of
Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Jeremiah A. Johnson
- Department of Chemistry and ‡Department of
Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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12
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Song C, Yu S, Liu C, Deng Y, Xu Y, Chen X, Dai L. Preparation of thermo-responsive graft copolymer by using a novel macro-RAFT agent and its application for drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 62:45-52. [PMID: 26952396 DOI: 10.1016/j.msec.2016.01.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 11/19/2015] [Accepted: 01/11/2016] [Indexed: 11/29/2022]
Abstract
A methodology to prepare thermo-responsive graft copolymer by using a novel macro-RAFT agent was proposed. The macro-RAFT agent with pendant dithioester (ZC(S)SR) was facilely prepared via the combination of RAFT polymerization and esterification reaction. By means of ZC(S)SR-initiated RAFT polymerization, the thermo-responsive graft copolymer consisting of poly(methyl methacrylate-co-hydroxylethyl methacrylate) (P(MMA-co-HEMA)) backbone and hydrophilic poly(N-isopropylacrylamide) (PNIPAAm) side chains was constructed through the "grafting from" approach. The chemical compositions and molecular weight distributions of the synthesized polymers were respectively characterized by (1)H nuclear magnetic resonance ((1)H NMR) and gel permeation chromatography (GPC). Self-assembly behavior of the amphiphilic graft copolymers (P(MMA-co-HEMA)-g-PNIPAAm) was studied by transmission electron microscopy (TEM), dynamic light scattering (DLS) and spectrofluorimeter. The critical micelle concentration (CMC) value was 0.052 mg mL(-1). These micelles have thermo-responsibility and a low critical solution temperature (LCST) of 33.5°C. Further investigation indicated that the guest molecule release property of these micelles, which can be well described by a first-order kinetic model, was significantly affected by temperature. Besides, the micelles exhibited excellent biocompatibility and cellular uptake property. Hence, these micelles are considered to have potential application in controlled drug delivery.
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Affiliation(s)
- Cunfeng Song
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China
| | - Shirong Yu
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China
| | - Cheng Liu
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China; Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Yuanming Deng
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China; Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Yiting Xu
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China; Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Xiaoling Chen
- Department of Endodontics, Xiamen Stomatology Hospital, Teaching Hospital of Fujian Medical University, Xiamen 361003, China.
| | - Lizong Dai
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China; Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China.
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13
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Cummins C, Mokarian-Tabari P, Holmes JD, Morris MA. Selective etching of polylactic acid in poly(styrene)-block-poly(d,l)lactide diblock copolymer for nanoscale patterning. J Appl Polym Sci 2014. [DOI: 10.1002/app.40798] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Cian Cummins
- Materials Research Group; Department of Chemistry and Tyndall National Institute; University College Cork; Cork Ireland
| | - Parvaneh Mokarian-Tabari
- Materials Research Group; Department of Chemistry and Tyndall National Institute; University College Cork; Cork Ireland
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN); Trinity College Dublin; Dublin Ireland
| | - Justin D. Holmes
- Materials Research Group; Department of Chemistry and Tyndall National Institute; University College Cork; Cork Ireland
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN); Trinity College Dublin; Dublin Ireland
| | - Michael A. Morris
- Materials Research Group; Department of Chemistry and Tyndall National Institute; University College Cork; Cork Ireland
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN); Trinity College Dublin; Dublin Ireland
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14
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Walther A, Müller AHE. Janus Particles: Synthesis, Self-Assembly, Physical Properties, and Applications. Chem Rev 2013; 113:5194-261. [DOI: 10.1021/cr300089t] [Citation(s) in RCA: 1328] [Impact Index Per Article: 120.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Andreas Walther
- DWI at RWTH Aachen University − Institute for Interactive Materials Research, D-52056 Aachen, Germany
| | - Axel H. E. Müller
- Institute of Organic Chemistry, Johannes Gutenberg University Mainz, D-55099 Mainz,
Germany
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15
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Lu D, Duan P, Liu T, Li J, Li T, Lei Z. Synthesis and characterization of biodegradable linear-hyperbranched barbell-like poly(ethylene glycol)-supported poly(lactic-ran
-glycolic acid) copolymers through direct polycondensation. POLYM INT 2013. [DOI: 10.1002/pi.4494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Dedai Lu
- Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Pengxue Duan
- Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Tao Liu
- Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Juan Li
- Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Ting'e Li
- Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Ziqiang Lei
- Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
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16
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Pang X, Zhao L, Feng C, Wu R, Ma H, Lin Z. Functional copolymer brushes composed of a hydrophobic backbone and densely grafted conjugated side chains via a combination of living polymerization with click chemistry. Polym Chem 2013. [DOI: 10.1039/c2py21124f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Moughton AO, Sagawa T, Gramlich WM, Seo M, Lodge TP, Hillmyer MA. Synthesis of block polymer miktobrushes. Polym Chem 2013. [DOI: 10.1039/c2py20656k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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18
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Bioengineering functional copolymers. XXI. Synthesis of a novel end carboxyl-trithiocarbonate functionalized poly(maleic anhydride) and its interaction with cancer cells. Bioorg Med Chem 2012; 20:5053-61. [DOI: 10.1016/j.bmc.2012.05.058] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 05/21/2012] [Accepted: 05/25/2012] [Indexed: 11/24/2022]
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19
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Wu D, Nese A, Pietrasik J, Liang Y, He H, Kruk M, Huang L, Kowalewski T, Matyjaszewski K. Preparation of polymeric nanoscale networks from cylindrical molecular bottlebrushes. ACS NANO 2012; 6:6208-6214. [PMID: 22721578 DOI: 10.1021/nn302096d] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The design and control of polymeric nanoscale network structures at the molecular level remains a challenging issue. Here we construct a novel type of polymeric nanoscale networks with a unique microporous nanofiber unit employing the intra/interbrush carbonyl cross-linking of polystyrene side chains for well-defined cylindrical polystyrene molecular bottlebrushes. The size of the side chains plays a vital role in the tuning of nanostructure of networks at the molecular level. We also show that the as-prepared polymeric nanoscale networks exhibit high specific adsorption capacity per unit surface area because of the synergistic effect of their unique hierarchical porous structures. Our strategy represents a new avenue for the network unit topology and provides a new application for molecular bottlebrushes in nanotechnology.
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Affiliation(s)
- Dingcai Wu
- Materials Science Institute, PCFM Laboratory, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
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Preparation and Characterization of Poly (vinylbenzyl chloride)- b-poly (lactide) Copolymers via Nitroxide-Mediated Controlled Radical and Ring-Opening Polymerization. ACTA ACUST UNITED AC 2012. [DOI: 10.4028/www.scientific.net/amr.554-556.295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydroxyl-terminated poly(vinylbenzyl chloride) (PVBCOH) were synthesized using nitroxide-mediated controlled radical polymerization. Then, PVBCOH was used as a macro-initiator for ring-opening polymerization of lactide (LA) in the presence of stannous octanoate (Sn(Oct)2) as a catalyst. The structures, molecular weights and polydispersity index (PDI) of PVBCOH and PVBC-b-PLA were characterized by 1H-NMR, and GPC, respectively. The results indicated that PDI of PVBCOH and PVBC-b-PLA was 1.63 and 1.27, respectively. Moreover, the molecular weight and PDI of PVBCOH and PVBC-b-PLA could be well tuned by changing monomer-to-initiator ratio.
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21
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He M, Jung J, Qiu F, Lin Z. Graphene-based transparent flexible electrodes for polymer solar cells. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm33784c] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Uchiyama H, Hayashi M, Kozuka H. Spontaneous pattern formation on silica and titania dip-coating films prepared at extremely low substrate withdrawal speeds. RSC Adv 2012. [DOI: 10.1039/c1ra00770j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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23
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Affiliation(s)
- Katsuhiko Ariga
- a World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), and JST, CREST , 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Keita Sakakibara
- a World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), and JST, CREST , 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Gary J. Richards
- a World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), and JST, CREST , 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Jonathan P. Hill
- a World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), and JST, CREST , 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
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Zuo Z, Yin X, Zhou C, Chen N, Liu H, Li Y, Li Y. Organic crystallizable solvent served as template for constructing well-ordered PPE films. J Colloid Interface Sci 2011; 356:86-91. [DOI: 10.1016/j.jcis.2010.12.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Accepted: 12/10/2010] [Indexed: 10/18/2022]
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Bolton J, Bailey TS, Rzayev J. Large pore size nanoporous materials from the self-assembly of asymmetric bottlebrush block copolymers. NANO LETTERS 2011; 11:998-1001. [PMID: 21280666 DOI: 10.1021/nl103747m] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Asymmetric polystyrene-polylactide (PS-PLA) bottlebrush block copolymers have been shown to self-assemble into a cylindrical morphology with large domain spacings. PLA cylinders can be selectively etched out of the shear-aligned polymer monoliths to generate nanoporous materials with an average cylindrical pore diameter of 55 nm. The remaining bottlebrush backbone provides a functional, hydrophilic coating inside the nanopores. This methodology significantly expands the range of pore sizes attainable in block copolymer based nanoporous materials.
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Affiliation(s)
- Justin Bolton
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
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Rzayev ZM, Söylemez EA, Davarcioğlu B. Functional copolymer/organo-MMT nanoarchitectures. VII. Interlamellar controlled/living radical copolymerization of maleic anhydride with butyl methacrylate via preintercalated RAFT agent-organoclay complexes. POLYM ADVAN TECHNOL 2011. [DOI: 10.1002/pat.1867] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Han W, Byun M, Zhao L, Rzayev J, Lin Z. Controlled evaporative self-assembly of hierarchically structured bottlebrush block copolymer with nanochannels. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10978b] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Uchiyama H, Namba W, Kozuka H. Spontaneous formation of linear striations and cell-like patterns on dip-coating titania films prepared from alkoxide solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11479-11484. [PMID: 20402530 DOI: 10.1021/la1009708] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Linear striations and cell-like patterns were spontaneously formed on the dip-coating titania films prepared titanium tetraisopropoxide (Ti(OC(3)H(7)(i))(4)) solutions. Such unique patterns on micrometer scale were arranged parallel to the substrate withdrawal direction. The values of R(Z) (10 point height of irregularities) and S (mean spacing of local peaks) of the patterns increased with increasing film thickness depending on the substrate withdrawal speed for dip-coating, the viscosity of the coating solutions, and the distance from the top edge of films. The shape of patterns changed from linear striations to cell-like patterns with increasing viscosity of the coating solutions. Although the heat treatment at 600 degrees C reduced the height (R(Z)) of stripes and cells without the change in spacing (S), the visibility of patterns was enhanced by the increase in refractive index due to the crystallization of films.
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Affiliation(s)
- Hiroaki Uchiyama
- Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita 564-8680, Japan.
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Poirier V, Duc M, Carpentier JF, Sarazin Y. One-pot synthesis of lactide-styrene diblock copolymers via catalytic immortal ring-opening polymerization of lactide and nitroxide-mediated polymerization of styrene. CHEMSUSCHEM 2010; 3:579-590. [PMID: 20373325 DOI: 10.1002/cssc.201000021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
An efficient, practical, and industrially relevant procedure for the production of polymer materials, in which a part of the oil-derived polyolefins has been replaced by a renewable, biodegradable, and biocompatible poly(lactide) block, is presented. Binary catalytic systems combining innocuous metals (yttrium, zinc, magnesium, or calcium) and bifunctional alcohols (acting as transfer agents) were developed to promote the immortal ring-opening polymerization of lactide directly in styrene. Up to 20,000 equivalents of lactide were polymerized (metal catalyst loading of 50-100 ppm) in a controlled fashion in the presence of 10-100 equivalents of a double-headed transfer agent to give as many end-functionalized poly(lactide) macromolecules that can be used eventually as macroinitiators for the controlled nitroxide-mediated polymerization of styrene. The specific use of the sterically shielded complex [BDI-iPr]Zn-N(SiMe(3))(2) ([BDI-iPr]=bis(diketiminate) ligand) allowed the efficient, catalytic, and controlled production of poly(lactide)-block-poly(styrene) materials in a one-pot, solvent-free sequential procedure, with nearly 100% atom-efficiency.
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Affiliation(s)
- Valentin Poirier
- Catalysis and Organometallics, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu-35042 Rennes Cedex, France
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