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Loose Semirigid Aromatic Polyester Bottle Brushes at Poly(2-isopropyl-2-oxazoline) Side Chains of Various Lengths: Behavior in Solutions and Thermoresponsiveness. Polymers (Basel) 2022; 14:polym14245354. [PMID: 36559721 PMCID: PMC9781464 DOI: 10.3390/polym14245354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/25/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022] Open
Abstract
A polycondensation aromatic polyester with an oxygen spacer was synthesized and used as a macroinitiator for the grafting of linear poly(2-isopropyl-2-oxazoline) (PiPrOx) by the cationic polymerization method. The length of the thermosensitive side chains was varied by the initiator:monomer ratio. Using methods of molecular hydrodynamics, light scattering and turbidimetry, the copolymers were studied in organic solvents and in water. The molecular characteristics of the main chain and graft copolymers, the polymerization degree of side chains and their grafting density have been determined. The equilibrium rigidity of the macroinitiator and the conformations of grafted macromolecules were evaluated. In selective solvents, they take on a star-like conformation or aggregate depending on the degree of shielding of the main chain by side chains. The thermoresponsiveness of graft copolymers in aqueous solutions was studied, and their LCST were estimated. The results are compared with data for graft copolymers composed of PiPrOx side chains and flexible or rigid chain backbones of aromatic polyester type.
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2
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Nabiyan A, Max JB, Schacher FH. Double hydrophilic copolymers - synthetic approaches, architectural variety, and current application fields. Chem Soc Rev 2022; 51:995-1044. [PMID: 35005750 DOI: 10.1039/d1cs00086a] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Solubility and functionality of polymeric materials are essential properties determining their role in any application. In that regard, double hydrophilic copolymers (DHC) are typically constructed from two chemically dissimilar but water-soluble building blocks. During the past decades, these materials have been intensely developed and utilised as, e.g., matrices for the design of multifunctional hybrid materials, in drug carriers and gene delivery, as nanoreactors, or as sensors. This is predominantly due to almost unlimited possibilities to precisely tune DHC composition and topology, their solution behavior, e.g., stimuli-response, and potential interactions with small molecules, ions and (nanoparticle) surfaces. In this contribution we want to highlight that this class of polymers has experienced tremendous progress regarding synthesis, architectural variety, and the possibility to combine response to different stimuli within one material. Especially the implementation of DHCs as versatile building blocks in hybrid materials expanded the range of water-based applications during the last two decades, which now includes also photocatalysis, sensing, and 3D inkjet printing of hydrogels, definitely going beyond already well-established utilisation in biomedicine or as templates.
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Affiliation(s)
- Afshin Nabiyan
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller University Jena, Lessingstraße 8, D-07743 Jena, Germany. .,Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, D-07743 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Philosophenweg 7a, 07743 Jena, Germany
| | - Johannes B Max
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller University Jena, Lessingstraße 8, D-07743 Jena, Germany. .,Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, D-07743 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Philosophenweg 7a, 07743 Jena, Germany
| | - Felix H Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller University Jena, Lessingstraße 8, D-07743 Jena, Germany. .,Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, D-07743 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Philosophenweg 7a, 07743 Jena, Germany
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3
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Thermoresponsive Molecular Brushes with a Rigid-Chain Aromatic Polyester Backbone and Poly-2-alkyl-2-oxazoline Side Chains. Int J Mol Sci 2021; 22:ijms222212265. [PMID: 34830139 PMCID: PMC8622345 DOI: 10.3390/ijms222212265] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 02/07/2023] Open
Abstract
A new polycondensation aromatic rigid-chain polyester macroinitiator was synthesized and used to graft linear poly-2-ethyl-2-oxazoline as well as poly-2-isopropyl-2-oxazoline by cationic polymerization. The prepared copolymers and the macroinitiator were characterized by NMR, GPC, AFM, turbidimetry, static, and dynamic light scattering. The molar masses of the polyester main chain and the grafted copolymers with poly-2-ethyl-2-oxazoline and poly-2-isopropyl-2-oxazoline side chains were 26,500, 208,000, and 67,900, respectively. The molar masses of the side chains of poly-2-ethyl-2-oxazoline and poly-2-isopropyl-2-oxazoline and their grafting densities were 7400 and 3400 and 0.53 and 0.27, respectively. In chloroform, the copolymers conformation can be considered as a cylinder wormlike chain, the diameter of which depends on the side chain length. In water at low temperatures, the macromolecules of the poly-2-ethyl-2-oxazoline copolymer assume a wormlike conformation because their backbones are well shielded by side chains, whereas the copolymer with short side chains and low grafting density strongly aggregates, which was visualized by AFM. The phase separation temperatures of the copolymers were lower than those of linear analogs of the side chains and decreased with the concentration for both samples. The LCST were estimated to be around 45 °C for the poly-2-ethyl-2-oxazoline graft copolymer, and below 20 °C for the poly-2-isopropyl-2-oxazoline graft copolymer.
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4
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Bercea M, Gradinaru LM, Barbalata-Mandru M, Vlad S, Nita LE, Plugariu IA, Albulescu R. Shear flow of associative polymers in aqueous solutions. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130441] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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5
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Tarabukina E, Fatullaev E, Krasova A, Kurlykin M, Tenkovtsev A, Sheiko SS, Filippov A. Synthesis, Structure, Hydrodynamics and Thermoresponsiveness of Graft Copolymer with Aromatic Polyester Backbone at Poly(2-isopropyl-2-oxazoline) Side Chains. Polymers (Basel) 2020; 12:polym12112643. [PMID: 33182803 PMCID: PMC7698206 DOI: 10.3390/polym12112643] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/04/2020] [Accepted: 11/08/2020] [Indexed: 02/06/2023] Open
Abstract
New thermoresponsive graft copolymers with an aromatic polyester backbone and poly(2-isopropyl-2-oxazoline) (PiPrOx) side chains are synthesized and characterized by NMR and GPC. The grafting density of side chains is 0.49. The molar masses of the graft-copolymer, its backbone, side chains, and the modeling poly-2-isopropyl-2-oxaziline are 74,000, 19,000, 4300, and 16,600 g·mol−1, respectively. Their conformational properties in nitropropane as well as thermoresponsiveness in aqueous solutions are studied and compared with that of free side chains, i.e., linear PiPrOx with a hydrophobic terminal group. In nitropropane, the graft-copolymer adopts conformation of a 13-arm star with a core of a collapsed main chain and a PiPrOx corona. Similarly, a linear PiPrOx chain protects its bulky terminal group by wrapping around it in a selective solvent. In aqueous solutions at low temperatures, graft copolymers form aggregates due to interaction of hydrophobic backbones, which contrasts to molecular solutions of the model linear PiPrOx. The lower critical solution temperature (LCST) for the graft copolymer is around 20 °C. The phase separation temperatures of the copolymer solution were lower than that of the linear chain counterpart, decreasing with concentration for both polymers.
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Affiliation(s)
- Elena Tarabukina
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint-Petersburg, Russia; (A.K.); (M.K.); (A.T.); (S.S.S.); (A.F.)
- Correspondence:
| | - Emil Fatullaev
- School of Photonics, St. Petersburg National Research University of Information Technologies, Mechanics and Optics, 199004 Saint-Petersburg, Russia;
| | - Anna Krasova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint-Petersburg, Russia; (A.K.); (M.K.); (A.T.); (S.S.S.); (A.F.)
| | - Mikhail Kurlykin
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint-Petersburg, Russia; (A.K.); (M.K.); (A.T.); (S.S.S.); (A.F.)
| | - Andrey Tenkovtsev
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint-Petersburg, Russia; (A.K.); (M.K.); (A.T.); (S.S.S.); (A.F.)
| | - Sergei S. Sheiko
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint-Petersburg, Russia; (A.K.); (M.K.); (A.T.); (S.S.S.); (A.F.)
- Department of Chemistry, University of North Carolina, Chapel Hill, NC 27599-3290, USA
| | - Alexander Filippov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint-Petersburg, Russia; (A.K.); (M.K.); (A.T.); (S.S.S.); (A.F.)
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6
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Conception and characterization of a multi-sensitive composite chitosan-red marine alga-polysaccharide hydrogels for insulin controlled-release. Carbohydr Polym 2020; 236:116046. [DOI: 10.1016/j.carbpol.2020.116046] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 02/17/2020] [Accepted: 02/19/2020] [Indexed: 01/02/2023]
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7
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Self-organization in aqueous solutions of thermosensitive star-shaped and linear gradient copolymers of 2-ethyl-2-oxazoline and 2-isopropyl-2-oxazoline. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04638-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Ma H, Kim KT. Self-Assembly of Bottlebrush Block Copolymers into Triply Periodic Nanostructures in a Dilute Solution. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b01662] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Hyunji Ma
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Kyoung Taek Kim
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
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9
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Kirila T, Smirnova A, Filippov A, Razina A, Tenkovtsev A, Filippov A. Thermosensitive star-shaped poly-2-ethyl-2-oxazine. Synthesis, structure characterization, conformation, and self-organization in aqueous solutions. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109215] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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10
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Kirila TY, Kurlykin MP, Ten’kovtsev AV, Filippov AP. Behavior of a Thermosensitive Star-Shaped Polymer with Polyethyloxazoline-block-Polyisopropyloxazoline Copolymer Arms. POLYMER SCIENCE SERIES A 2018. [DOI: 10.1134/s0965545x18030069] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Zheng P, Su X, Fei C, Shi X, Yin H, Feng Y. Deep insights into the hydrolysis of N,N
-dialkylaminoethyl methacrylates in aqueous solution with 1
H NMR spectroscopy. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/polb.24606] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Pengfei Zheng
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute; Sichuan University; Chengdu 610065 People's Republic of China
| | - Xin Su
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute; Sichuan University; Chengdu 610065 People's Republic of China
| | - Chenhong Fei
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences; Chengdu 610041 People's Republic of China
| | - Xiaohuo Shi
- Kunming Institute of Botany, Chinese Academy of Science; Kunming 650201 People's Republic of China
| | - Hongyao Yin
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute; Sichuan University; Chengdu 610065 People's Republic of China
| | - Yujun Feng
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute; Sichuan University; Chengdu 610065 People's Republic of China
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences; Chengdu 610041 People's Republic of China
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12
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Dragan ES, Bercea M, Sacarascu L. Tuning the associative properties and micelles geometry by stepwise quaternization of PDMAEMA. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.01.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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13
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Meleshko TK, Ivanova AS, Kashina AV, Ivanov IV, Nekrasova TN, Zakharova NV, Filippov AP, Yakimansky AV. Synthesis of Graft Copolyimides with Poly(N,N-dimethylamino-2-ethyl methacrylate) Side Chains and Hybrid Nanocomposites with Silver Nanoparticles. POLYMER SCIENCE SERIES B 2018. [DOI: 10.1134/s1560090417060045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Synthesis and characterization of a multi-sensitive polysaccharide hydrogel for drug delivery. Carbohydr Polym 2017; 177:275-283. [DOI: 10.1016/j.carbpol.2017.08.133] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 08/21/2017] [Accepted: 08/24/2017] [Indexed: 02/06/2023]
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15
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Ivanova AS, Zakharova NV, Filippov AP, Meleshko TK, Yakimansky AV. Effects of concentration and pH on the thermosensitive behavior of a graft copolymer with polyimide backbone and poly(N,N-dimethylamino-2-ethyl methacrylate) side chains. POLYMER SCIENCE SERIES A 2017. [DOI: 10.1134/s0965545x17030087] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Wang S, Liu C, Zhou H, Gao C, Zhang W. An efficient route to synthesize thermoresponsive molecular bottlebrushes of poly[o-aminobenzyl alcohol-graft-poly(N-isopropylacrylamide)]. Polym Chem 2017. [DOI: 10.1039/c6py02188c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The thermoresponsive molecular bottlebrushes of poly[o-aminobenzyl alcohol-graft-poly(N-isopropylacrylamide)] [P(oABA-g-PNIPAM)] were synthesized and their characteristic thermoresponse was demonstrated.
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Affiliation(s)
- Shuang Wang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Chonggao Liu
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Heng Zhou
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Chengqiang Gao
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Wangqing Zhang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
- China
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17
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Parmar IA, Shedge AS, Badiger MV, Wadgaonkar PP, Lele AK. Thermo-reversible sol–gel transition of aqueous solutions of patchy polymers. RSC Adv 2017. [DOI: 10.1039/c6ra27030a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aqueous solutions of an amphiphilic thermoreversible patchy polymer show abrupt gelation upon cooling by the combined effect of percolation and transition from intra to intermolecular hydrophobic associations.
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Affiliation(s)
- Indravadan A. Parmar
- Polymer Science and Engineering Division
- CSIR-National Chemical Laboratory
- Pune 411 008
- India
| | - Aarti S. Shedge
- Polymer Science and Engineering Division
- CSIR-National Chemical Laboratory
- Pune 411 008
- India
| | - Manohar V. Badiger
- Polymer Science and Engineering Division
- CSIR-National Chemical Laboratory
- Pune 411 008
- India
| | - Prakash P. Wadgaonkar
- Polymer Science and Engineering Division
- CSIR-National Chemical Laboratory
- Pune 411 008
- India
| | - Ashish K. Lele
- Polymer Science and Engineering Division
- CSIR-National Chemical Laboratory
- Pune 411 008
- India
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18
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Lauber L, Santarelli J, Boyron O, Chassenieux C, Colombani O, Nicolai T. pH- and Thermoresponsive Self-Assembly of Cationic Triblock Copolymers with Controlled Dynamics. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02201] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Lionel Lauber
- IMMM-UMR
CNRS 6283, Equipe Polymères, Colloïdes et Interfaces, Université du Maine, av. O. Messiaen, 72085 Le Mans, Cedex 9, France
| | - Julien Santarelli
- IMMM-UMR
CNRS 6283, Equipe Polymères, Colloïdes et Interfaces, Université du Maine, av. O. Messiaen, 72085 Le Mans, Cedex 9, France
| | - Olivier Boyron
- C2P2
UMR5265 CNRS, LCPP Group, ESCPE Lyon, Université de Lyon, Bat 308, 43
Bd du 11 novembre 1918, 69616 Villeurbanne, France
| | - Christophe Chassenieux
- IMMM-UMR
CNRS 6283, Equipe Polymères, Colloïdes et Interfaces, Université du Maine, av. O. Messiaen, 72085 Le Mans, Cedex 9, France
| | - Olivier Colombani
- IMMM-UMR
CNRS 6283, Equipe Polymères, Colloïdes et Interfaces, Université du Maine, av. O. Messiaen, 72085 Le Mans, Cedex 9, France
| | - Taco Nicolai
- IMMM-UMR
CNRS 6283, Equipe Polymères, Colloïdes et Interfaces, Université du Maine, av. O. Messiaen, 72085 Le Mans, Cedex 9, France
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19
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Tan Y, Zhang W, Li Y, Xia Y, Sui K. Grafting of multi-sensitive PDMAEMA brushes onto carbon nanotubes by ATNRC: tunable thickening/thinning and self-assembly behaviors in aqueous solutions. RSC Adv 2016. [DOI: 10.1039/c6ra20088e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Shear-induced thickening/thinning response of synthesized MWNTs-g-PDMAEMA suspensions was facially adjusted by altering the hydrophobic interaction, amount of f-PDMAEMA and grafted-chain length.
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Affiliation(s)
- Yeqiang Tan
- Collaborative Innovation Center for Marine Biomass Fibers
- Materials and Textiles of Shandong Province
- School of Materials Science and Engineering
- Qingdao University
- Qingdao
| | - Wenqian Zhang
- Collaborative Innovation Center for Marine Biomass Fibers
- Materials and Textiles of Shandong Province
- School of Materials Science and Engineering
- Qingdao University
- Qingdao
| | - Yanhui Li
- Collaborative Innovation Center for Marine Biomass Fibers
- Materials and Textiles of Shandong Province
- School of Materials Science and Engineering
- Qingdao University
- Qingdao
| | - Yanzhi Xia
- Collaborative Innovation Center for Marine Biomass Fibers
- Materials and Textiles of Shandong Province
- School of Materials Science and Engineering
- Qingdao University
- Qingdao
| | - Kunyan Sui
- Collaborative Innovation Center for Marine Biomass Fibers
- Materials and Textiles of Shandong Province
- School of Materials Science and Engineering
- Qingdao University
- Qingdao
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20
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Han X, Xiong Z, Zhang X, Liu H. Multi-tunable self-assembled morphologies of stimuli-responsive diblock polyampholyte films on solid substrates. SOFT MATTER 2015; 11:2139-2146. [PMID: 25631073 DOI: 10.1039/c5sm00025d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Intelligent polymers, due to their sensitive stimuli response to changes in the environment, have gained increasing amounts of attention over recent years and have become a popular topic in polymer materials science. In this study, the aggregation behaviors and stimuli responses of the stimuli-responsive diblock polyampholyte poly(2-(dimethylamino)ethyl methacrylate)-b-poly(acrylic acid) (PDMAEMA-b-PAA) are conveniently tunable by introducing pH changes, temperature changes, salt addition and surfactant neutralization. Under different pH values, either globular or fractal self-assemblies can be observed in which the latter have crystal properties. Salts and alkalis can promote the fractal aggregation growth because their deposited crystals can act as nucleation sites for the polyampholyte chains. A combination of fluorescence spectroscopy, atom force microscopy and transmission electron microscopy revealed that the presence of anionic surfactants in the PDMAEMA-b-PAA solutions promoted the solubility of the polyampholyte, consequently leading to a more homogeneous distribution of the polymer chains on the solid substrate upon drying the mixtures. The fractal formation was suppressed for the studied Gemini surfactants, and a higher surfactant hydrophobicity results in an earlier start of the formation of the fractal pattern.
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Affiliation(s)
- Xia Han
- Key Laboratory for Advanced Materials and Department of Chemistry, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China.
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21
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Sun J, Wei W, Zhao D, Hu Q, Liu X. Liquid marbles prepared from pH-responsive self-assembled micelles. SOFT MATTER 2015; 11:1954-1961. [PMID: 25621854 DOI: 10.1039/c4sm02832e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, we report the assembly of amphiphilic polymeric micelles at the liquid/air interface to prepare liquid marbles for the first time. The polymeric micelles were synthesized from the self-assembly of a fluoropolymer, poly(styrene-co-acrylic acid-co-2,2,3,4,4,4-hexafluorobutyl methacrylate), in a selective solvent. The particle size, morphology and chemical composition of the micelles were determined by dynamic light scattering (DLS), transmission electron microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. DLS and aqueous electrophoresis revealed the pH-responsiveness of the micelles in aqueous dispersion. Liquid marbles with water volumes varying from 10 μL to 1 mL were formed by rolling water droplets on the micelle powder bed. The increase in water volume led to the shape transition of the liquid marbles from quasi-spherical to a puddle-like shape because of gravity. Fluorescence microscopy was used to observe the morphology of the formed liquid marbles, which confirmed that the micelles were adsorbed at the interface of water and air. The effective surface tension of the liquid marbles decreased with the increasing concentration of NaOH, which was added to the interior water phase. This agreed with the results of droplet roller experiments: the mechanical integrity of the liquid marbles prepared from alkaline solution (pH 10) was relatively poorer than those prepared from acidic solution (pH 2). Moreover, these liquid marbles coated with micelles showed pH-responsiveness when transferred onto the surfaces of aqueous solutions with different pH values. The liquid marbles were relatively stable on the acidic solution, whereas they burst immediately on the alkaline solution with a pH of 10. In addition, apart from water, Gellan gum solution and glycerol could be also successfully encapsulated by the fluorinated micelles to form stable liquid marbles.
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Affiliation(s)
- Jianhua Sun
- Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
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22
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Physicochemical characterization of the thermo-induced self-assembly of thermo-responsive PDMAEMA-b
-PDEGMA copolymers. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27520] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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23
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Zhang Q, Hoogenboom R. UCST behavior of polyampholytes based on stoichiometric RAFT copolymerization of cationic and anionic monomers. Chem Commun (Camb) 2015; 51:70-3. [DOI: 10.1039/c4cc07930b] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Polyampholytes with controlled equimolar ratio of charges were synthesized by reversible addition–fragmentation chain transfer (RAFT) copolymerization of cationic and anionic monomers and their UCST behavior is reported.
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Affiliation(s)
- Qilu Zhang
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
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24
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Zhang H, Fan X, Li F, Suo R, Li H, Yang Z, Zhang W, Bai Y, Tian W. Thermo and pH dual-controlled charge reversal amphiphilic graft copolymer micelles for overcoming drug resistance in cancer cells. J Mater Chem B 2015; 3:4585-4596. [DOI: 10.1039/c5tb00530b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A novel thermo and pH dual-controlled charge reversal PSMA89-g-P(DMA16-co-SD56) graft copolymer micelle was developed with effectively enhanced cellular uptake for overcoming multi-drug resistance in cancer cells.
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Affiliation(s)
- Haitao Zhang
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Xiaodong Fan
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Fei Li
- Department of Pharmacy
- Ji'nan
- China
| | - Rongtian Suo
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Hui Li
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Zhen Yang
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Wanbin Zhang
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Yang Bai
- Xi'an Modern Chemistry Research Institute
- Xi'an
- P. R. China
| | - Wei Tian
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
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25
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Sun J, Yi C, Wei W, Zhao D, Hu Q, Liu X. Nanohybrids from direct chemical self-assembly of poly(styrene-alt-maleic anhydride) as pH-responsive particulate emulsifiers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:14757-14764. [PMID: 25423487 DOI: 10.1021/la504281b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The nanohybrid particulate emulsifiers based on poly(styrene-alt-maleic anhydride) (SMA) were facilely prepared via the direct chemical self-assembly triggered by the aminolysis of SMA with 3-aminopropyltriethoxysilane (APTES) and the in situ polycondensation of APTES under refluxing in acetone. Transmission electron microscopy and scanning electron microscopy confirmed the spherical-like morphology of the nanohybrids. Dynamic light scattering and electrophoresis revealed the structure transition of the nanohybrids in response to pH change. The emulsification study showed that the nanohybrids were effective particulate emulsifiers when homogenized with various oils including toluene, paraffin oil, silicone oil, isooctyl palmitate, dicaprylyl carbonate, and propylheptyl caprylate. The nanohybrid particulate emulsifiers exhibited pH-sensitivity, and the diameter of paraffin oil droplets remarkably increased with pH of the nanohybrid aqueous dispersion decrease. Also, the reduced dynamic interfacial tension predicted the thermodynamically unstable state of the emulsions prepared at high pH values. Most interesting, the paraffin oil-in-water high internal phase emulsions (HIPEs) with a high oil volume fraction of 83.3% were formed when the nanohybrids were heavily flocculated by adding HCl. The HIPEs were pH-responsive and capable of demulsification with the addition of an alkaline solution showing a potential application in the oil industry.
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Affiliation(s)
- Jianhua Sun
- Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University , Wuxi 214122, China
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26
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Filippov AP, Belyaeva EV, Zakharova NV, Sasina AS, Ilgach DM, Meleshko TK, Yakimansky AV. Double stimuli-responsive behavior of graft copolymer with polyimide backbone and poly(N,N-dimethylaminoethyl methacrylate) side chains. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3441-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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27
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Wilms VS, Frey H. Aminofunctional polyethers: smart materials for applications in solution and on surfaces. POLYM INT 2013. [DOI: 10.1002/pi.4496] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Valerie S. Wilms
- Johannes-Gutenberg-University Mainz, Department of Organic Chemistry; Duesbergweg 10-14, 55099 Mainz, and Graduate School ‘Materials Science in Mainz’; Staudingerweg 9 55128 Mainz Germany
| | - Holger Frey
- Johannes-Gutenberg-University Mainz, Department of Organic Chemistry; Duesbergweg 10-14, 55099 Mainz, and Graduate School ‘Materials Science in Mainz’; Staudingerweg 9 55128 Mainz Germany
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28
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Han X, Zhang X, Yin Q, Hu J, Liu H, Hu Y. Thermoresponsive Diblock Copolymer with Tunable Soluble-Insoluble and Soluble-Insoluble-Soluble Transitions. Macromol Rapid Commun 2013; 34:574-80. [DOI: 10.1002/marc.201200785] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 12/28/2012] [Indexed: 12/16/2022]
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29
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Han X, Zhang X, Zhu H, Yin Q, Liu H, Hu Y. Effect of composition of PDMAEMA-b-PAA block copolymers on their pH- and temperature-responsive behaviors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1024-1034. [PMID: 23289767 DOI: 10.1021/la3036874] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A series of poly(2-(dimethylamino) ethyl methacrylate) (PDMAEMA) homopolymers and poly(2-(dimethylamino)ethyl methacrylate)-b-poly(acrylic acid) (PDMAEMA-b-PAA) diblock copolymers were synthesized by atomic transfer radical polymerization. Thanks to a fine-tuning of the hydrophobic-hydrophilic balance by varying the molecular weight of the polymers and the pH of the aqueous solutions, as well as the composition for the block copolymers, the lower critical solution temperature (LCST) and the aggregation-dissolution kinetics of PDMAEMA homopolymers and PDMAEMA-b-PAA block copolymers can be adjusted. For the block copolymers, the results show that larger relative size of the PDMAEMA blocks leads to an increasing tendency to form micellar aggregates and a decrease of the LCST of the aqueous solution, which is consistent with the increasing copolymer hydrophobicity. A significant difference of the stimuli-responsive behavior between PDMAEMA-rich and PAA-rich copolymers is observed, because the former exhibit thermo-responsive behavior in a broad temperature range of 40-60 °C in basic media, while the pH-responsive behavior is dominant, and only a weak thermo-responsive behavior is exhibited around the specific isoelectric point (IEP) in the latter case. The aggregation rate is strongly influenced by temperature, molecular weight, structure, and composition of the polymer. Specifically, temperature has a stronger effect than the molar ratio of the PDMAEMA segment in the copolymer (related to its hydrophobicity) and the chain molecular weight, although the PDMAEMA-b-PAA copolymers show faster aggregation rate than do the PDMAEMA homopolymers.
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Affiliation(s)
- Xia Han
- Key Laboratory for Advanced Materials and Department of Chemistry, East China University of Science & Technology, Shanghai 200237, China
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30
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Li W, Feng S, Guo Y. Tailoring polymeric micelles to optimize delivery to solid tumors. Nanomedicine (Lond) 2013; 7:1235-52. [PMID: 22931449 DOI: 10.2217/nnm.12.88] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Block copolymer micelles have shown great potential in drug delivery systems, not only for overcoming the drawbacks of small agents such as water insolubility and wide distribution in normal tissues, but also for avoiding traditional nanoparticle formulation shortcomings, including in vivo instability and fast clearance from the blood. However, for translating micellar formulations to clinical practice, it is essential to overcome the many in vivo obstacles. Surmounting these barriers strongly depends on micellar physicochemical properties, which can be further optimized by the unique physiological aspects of solid tumors such as low pH, high temperature and the presence of abnormal vessels. Herein, based on the Flory parameter and scaling theory, the fundamental mechanisms and correlations in vitro/in vivo between self assembly, drug loading and release, stability, intracellular delivery and in vivo distribution, as well as micellar composition, size and microstructural tailoring are systematically revisited. The methods for enhancing micellar performance in solid tumors were consequently proposed through well-defined core-corona structure tailoring.
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Affiliation(s)
- Wei Li
- International Joint Cancer Institute, The Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, PR China.
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31
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Sun S, Xu S, Zhang W, Wu P, Zhang W, Zhu X. Cooperative self-assembly and crystallization into fractal patterns by PNIPAM-based nonlinear multihydrophilic block copolymers under alkaline conditions. Polym Chem 2013. [DOI: 10.1039/c3py00682d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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