1
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Cao PF, de Leon A, Rong L, Yin KZ, Abenojar EC, Su Z, Tiu BDB, Exner AA, Baer E, Advincula RC. Polymer Nanosheet Containing Star-Like Copolymers: A Novel Scalable Controlled Release System. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800115. [PMID: 29700977 DOI: 10.1002/smll.201800115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/16/2018] [Indexed: 06/08/2023]
Abstract
Poly(ε-caprolactone) (PCL)-based nanomaterials, such as nanoparticles and liposomes, have exhibited great potential as controlled release systems, but the difficulties in large-scale fabrication limit their practical applications. Among the various methods being developed to fabricate polymer nanosheets (PNSs) for different applications, such as Langmuir-Blodgett technique and layer-by-layer assembly, are very effort consuming, and only a few PNSs can be obtained. In this paper, poly(ε-caprolactone)-based PNSs with adjustable thickness are obtained in large quantity by simple water exposure of multilayer polymer films, which are fabricated via a layer multiplying coextrusion method. The PNS is also demonstrated as a novel controlled guest release system, in which release kinetics are adjustable by the nanosheet thickness, pH values of the media, and the presence of protecting layers. Theoretical simulations, including Korsmeyer-Peppas model and Finite-element analysis, are also employed to discern the observed guest-release mechanisms.
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Affiliation(s)
- Peng-Fei Cao
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - Al de Leon
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Lihan Rong
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Ke-Zhen Yin
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Eric C Abenojar
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Zhe Su
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Brylee David B Tiu
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Bioengineering and Materials Science and Engineering, University of California Berkeley, Berkeley, CA, 94720, USA
| | - Agata A Exner
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Eric Baer
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Rigoberto C Advincula
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
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2
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Sun K, Guo L, Cai C, Hou Z, Ren Q. Porphyrin-Hyperbranched Copolymer Films as Recyclable Photooxidation Catalysts for 1,5-Dihydroxynaphthalene. ChemCatChem 2017. [DOI: 10.1002/cctc.201701219] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Kaifang Sun
- School of Chemistry and Chemical Engineering; Shanghai Jiaotong University; Shanghai 200240 P.R. China
| | - Lintong Guo
- School of Chemistry and Chemical Engineering; Shanghai Jiaotong University; Shanghai 200240 P.R. China
| | - Cheng Cai
- School of Chemistry and Chemical Engineering; Shanghai Jiaotong University; Shanghai 200240 P.R. China
| | - Zongsheng Hou
- School of Chemistry and Chemical Engineering; Shanghai Jiaotong University; Shanghai 200240 P.R. China
| | - Qizhi Ren
- School of Chemistry and Chemical Engineering; Shanghai Jiaotong University; Shanghai 200240 P.R. China
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3
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Acebo C, Ramis X, Serra A. Improved epoxy thermosets by the use of poly(ethyleneimine) derivatives. PHYSICAL SCIENCES REVIEWS 2017. [DOI: 10.1515/psr-2016-0128] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Abstract
Epoxy resins are commonly used as thermosetting materials due to their excellent mechanical properties, high adhesion to many substrates and good heat and chemical resistances. This type of thermosets is intensively used in a wide range of fields, where they act as fiber-reinforced materials, general-purpose adhesives, high-performance coatings and encapsulating materials. These materials are formed by the chemical reaction of multifunctional epoxy monomers forming a polymer network produced through an irreversible way. In this article the improvement of the characteristics of epoxy thermosets using different hyperbranched poly(ethyleneimine) (PEI) derivatives will be explained.
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4
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Cao PF, Rong LH, Mangadlao JD, Advincula RC. Synthesizing a Trefoil Knotted Block Copolymer via Ring-Expansion Strategy. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Peng-Fei Cao
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
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5
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Kriel FH, Priest C. Influence of Sample Volume and Solvent Evaporation on Absorbance Spectroscopy in a Microfluidic "Pillar-Cuvette". ANAL SCI 2016; 32:103-8. [PMID: 26753714 DOI: 10.2116/analsci.32.103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Spectroscopic analysis of solutions containing samples at high concentrations or molar absorptivity can present practical challenges. In absorbance spectroscopy, short optical path lengths or multiple dilution is required to bring the measured absorbance into the range of the Beer's Law calibration. We have previously reported an open "pillar-cuvette" with a micropillar array that is spontaneously filled with a precise (nL or μL) volume to create the well-defined optical path of, for example, 10 to 20 μm. Evaporation should not be ignored for open cuvettes and, herein, the volume of loaded sample and the rate of evaporation from the cuvette are studied. It was found that the volume of loaded sample (between 1 and 10 μL) had no effect on the Beer's Law calibration for methyl orange solutions (molar absorptivity of (2.42 ± 0.02)× 10(4) L mol(-1) cm(-1)) for cuvettes with a 14.2 ± 0.2 μm path length. Evaporation rates of water from methyl orange solutions were between 2 and 5 nL s(-1) (30 - 40% relative humidity; 23°C), depending on the sample concentration and ambient conditions. Evaporation could be reduced by placing a cover slip several millimeters above the cuvette. Importantly, the results show that a "drop-and-measure" method (measurement within ∼3 s of cuvette loading) eliminates the need for extrapolation of the absorbance-time data for accurate analysis of samples.
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6
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Cao PF, Yan YH, Mangadlao JD, Rong LH, Advincula R. Star-like copolymer stabilized noble-metal nanoparticle powders. NANOSCALE 2016; 8:7435-7442. [PMID: 26659728 DOI: 10.1039/c5nr07000g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The amphiphilic star-like copolymer polyethylenimine-block-poly(ε-caprolactone) (PEI-b-PCL) was utilized to transfer the pre-synthesized citrate-capped noble metal nanoparticles (NMNPs) from an aqueous layer to an organic layer without any additional reagents. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) were utilized to study the assembly of the polymers coated on the surface of the citrate-capped NMNPs. After removing the organic solvent, the polymer-coated NMNPs in powder form (PCP-NMNPs) were obtained. The excellent solubility of the PEI-b-PCL allows the PCP-NMNPs to be easily dispersed in most of the organic solvents without any significant aggregation. Moreover, the good thermal stability and long-term stability make PCP-NMNPs an excellent NMNP-containing hybrid system for different specific applications, such as surface coating, catalysis and thermoplastic processing of nanocomposite materials.
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Affiliation(s)
- Peng-Fei Cao
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44146, USA.
| | - Yun-Hui Yan
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44146, USA.
| | - Joey Dacula Mangadlao
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44146, USA.
| | - Li-Han Rong
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44146, USA.
| | - Rigoberto Advincula
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44146, USA.
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7
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Mou Q, Ma Y, Jin X, Yan D, Zhu X. Host–guest binding motifs based on hyperbranched polymers. Chem Commun (Camb) 2016; 52:11728-43. [DOI: 10.1039/c6cc03643k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Host–guest systems based on hyperbranched polymers together with their unique properties and various applications have been summarized.
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Affiliation(s)
- Quanbing Mou
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Yuan Ma
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Xin Jin
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Deyue Yan
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
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Amino acid modified hyperbranched poly(ethylene imine) with disaccharide decoration as anionic core–shell architecture: Influence of the pH and molecular architecture on solution behaviour. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.10.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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9
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Cao PF, Rong LH, de Leon A, Su Z, Advincula RC. A Supramolecular Polyethylenimine-Cored Carbazole Dendritic Polymer with Dual Applications. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01750] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Peng-Fei Cao
- Department of Macromolecular Science
and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Li-Han Rong
- Department of Macromolecular Science
and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Al de Leon
- Department of Macromolecular Science
and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Zhe Su
- Department of Macromolecular Science
and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Rigoberto C. Advincula
- Department of Macromolecular Science
and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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10
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Cao PF, Mangadlao JD, de Leon A, Su Z, Advincula RC. Catenated Poly(ε-caprolactone) and Poly(l-lactide) via Ring-Expansion Strategy. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00470] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Peng-Fei Cao
- Department of Macromolecular
Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Joey Dacula Mangadlao
- Department of Macromolecular
Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Al de Leon
- Department of Macromolecular
Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Zhe Su
- Department of Macromolecular
Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Rigoberto C. Advincula
- Department of Macromolecular
Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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11
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Zhan C, Li S, Cui J, Chen Y. Multiarm star poly(ɛ-caprolactone) with hyperbranched polyamidoamine as core capable of selective accommodating cationic or anionic guests. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1651-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Cao PF, Mangadlao J, Advincula R. A trefoil knotted polymer produced through ring expansion. Angew Chem Int Ed Engl 2015; 54:5127-31. [PMID: 25728998 DOI: 10.1002/anie.201411623] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 01/16/2014] [Indexed: 12/29/2022]
Abstract
A synthetic strategy is reported for the production of a trefoil knotted polymer from a copper(I)-templated helical knot precursor through ring expansion. The expected changes in the properties of the knotted polymer compared to a linear analogue, for example, reduced hydrodynamic radius and lower intrinsic viscosity, together with an atomic force microscopy (AFM) image of individual molecular knots, confirmed the formation of the resulting trefoil knotted polymer. The strategies employed here could be utilized to enrich the variety of available polymers with new architectures.
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Affiliation(s)
- Peng-Fei Cao
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106 (USA)
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13
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Cao PF, Mangadlao J, Advincula R. A Trefoil Knotted Polymer Produced through Ring Expansion. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411623] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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14
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Cao PF, Su Z, de Leon A, Advincula RC. Photoswitchable Nanocarrier with Reversible Encapsulation Properties. ACS Macro Lett 2015; 4:58-62. [PMID: 35596373 DOI: 10.1021/mz500632r] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
An amphiphilic dendritic polymer with polyethylenimine (PEI) as the hydrophilic core, steric ester (STA) as the hydrophobic shell, and azobenzene (AZO) groups as the photoswitchable moieties was synthesized via amidation reaction. The synthesized dendritic macromolecule was characterized by 1H nuclear magnetic resonance (NMR), FT-IR spectroscopy, and dynamic light scattering (DLS). With alternating UV and visible-light irradiation, azobenzene moieties of polyethylenimine-steric ester-azobenzene (PEI-STA-AZO) undergo a reversible isomerization between the cis and trans state. The encapsulation tests demonstrated that PEI-STA-AZO with trans-isomer is not capable of encapsulating anionic guests, whereas the one with cis-isomers is able to encapsulate the anionic guests from the aqueous solution to the organic layer. Molecular modeling by Spartan was utilized to explain the special encapsulation property of PEI-STA-AZO. Azobenzene groups functioned as a reversible "photo-switch" in the dendritic guest-host system, and the reversibility of encapsulation capability of PEI-STA-AZO was also demonstrated.
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Affiliation(s)
- Peng-Fei Cao
- Department of Macromolecular
Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Zhe Su
- Department of Macromolecular
Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Al de Leon
- Department of Macromolecular
Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Rigoberto C. Advincula
- Department of Macromolecular
Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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15
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pH-responsive star-shaped functionalized poly(ethylene glycol)-b-poly(ε-caprolactone) with amino groups. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3261-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Huang X, Heo MS, Yoo JW, Choi JS, Kim I. Hyperbranched aliphatic polyether esters by ring-opening polymerization of epoxidized 2-hydroxyethyl methacrylate. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xinhua Huang
- Department of Polymer Science and Engineering, BK 21 PLUS Center for Advanced Chemical Technology; Pusan National University; Pusan 609-735 Republic of Korea
| | - Min Seon Heo
- Department of Polymer Science and Engineering, BK 21 PLUS Center for Advanced Chemical Technology; Pusan National University; Pusan 609-735 Republic of Korea
| | - Jin-Wook Yoo
- College of Pharmacy; Pusan National University; Pusan 609-735 Republic of Korea
| | - Jin-Seok Choi
- Department of Food & Drug; Chosun University; Gwangju Republic of Korea
| | - Il Kim
- Department of Polymer Science and Engineering, BK 21 PLUS Center for Advanced Chemical Technology; Pusan National University; Pusan 609-735 Republic of Korea
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17
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Jia M, Ren T, Wang A, Yuan W, Ren J. Amphiphilic star-shaped poly(ε-caprolactone)-block-poly(l-lysine) copolymers with porphyrin core: Synthesis, self-assembly, and cell viability assay. J Appl Polym Sci 2013. [DOI: 10.1002/app.40097] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Menghong Jia
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
| | - Tianbin Ren
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education; Shanghai 201804 People's Republic of China
| | - An Wang
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
| | - Weizhong Yuan
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education; Shanghai 201804 People's Republic of China
| | - Jie Ren
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education; Shanghai 201804 People's Republic of China
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18
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Sisson AL, Ekinci D, Lendlein A. The contemporary role of ε-caprolactone chemistry to create advanced polymer architectures. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.04.045] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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19
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Systhesis of double-hydrophilic core-shell type multiarm star copolymer polyethylenimine-block-poly(2-hydroxyethyl methacrylate. CHINESE JOURNAL OF POLYMER SCIENCE 2013. [DOI: 10.1007/s10118-013-1298-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Cao PF, Felipe MJ, Advincula RC. On the Formation and Electropolymerization of a Star Copolymer With Peripheral Carbazoles. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200344] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Li L, Wang ML, Chen Y, Jiang SC. Multifunctional covalently stabilized vesicles acting simultaneously as the template of gold nanoparticle cluster and the nanocarrier of guest molecules. J Colloid Interface Sci 2012; 387:146-52. [DOI: 10.1016/j.jcis.2012.08.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Revised: 08/02/2012] [Accepted: 08/03/2012] [Indexed: 10/28/2022]
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22
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Zhang CX, Wang B, Chen Y, Cheng F, Jiang SC. Amphiphilic multiarm star polylactide with hyperbranched polyethylenimine as core: A systematic reinvestigation. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.07.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Zhao RX, Li L, Wang B, Yang WW, Chen Y, He XH, Cheng F, Jiang SC. Aliphatic tertiary amine mediated synthesis of highly branched polylactide copolymers. POLYMER 2012. [DOI: 10.1016/j.polymer.2011.12.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Wan D, Jin M, Pu H, Wang G. Charge selective encapsulation by polymeric micelles with cationic, anionic, or zwitterionic cores. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.25900] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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25
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Shi X, Zhou W, Qiu Q, An Z. Amphiphilic heteroarm star polymer synthesized by RAFT dispersion polymerization in water/ethanol solution. Chem Commun (Camb) 2012; 48:7389-91. [DOI: 10.1039/c2cc33812b] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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26
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Cao PF, Zhao RX, Li L, Yang WW, Cheng F, Chen Y, Lu CH, Jiang SC. Covalently stabilized vesicles derived from amphiphilic multiarm star polymers: Preparation, characterization, and their capability of hosting different polarity of guests. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.25015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Wan D, Chen F, Kakuchi T, Satoh T. Guest release and solution behavior of a hydrogen-bonding physical micelle during chemoresponsive shell disruption. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.05.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Wan D, Pu H, Jin M, Wang G, Huang J. Supramolecular fuzzy recognition leads to effective differentiation of similar molecules. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24667] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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29
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Comparative study on the supramolecular nanocarriers derived from the assembly of gemini and conventional surfactants onto hyperbranched polyethylenimine. Macromol Res 2011. [DOI: 10.1007/s13233-011-0201-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Cameron DJA, Shaver MP. Aliphatic polyester polymer stars: synthesis, properties and applications in biomedicine and nanotechnology. Chem Soc Rev 2010; 40:1761-76. [PMID: 21082079 DOI: 10.1039/c0cs00091d] [Citation(s) in RCA: 302] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A critical review: the ring-opening polymerization of cyclic esters provides access to an array of biodegradable, bioassimilable and renewable polymeric materials. Building these aliphatic polyester polymers into larger macromolecular frameworks provides further control over polymer characteristics and opens up unique applications. Polymer stars, where multiple arms radiate from a single core molecule, have found particular utility in the areas of drug delivery and nanotechnology. A challenge in this field is in understanding the impact of altering synthetic variables on polymer properties. We review the synthesis and characterization of aliphatic polyester polymer stars, focusing on polymers originating from lactide, ε-caprolactone, glycolide, β-butyrolactone and trimethylene carbonate monomers and their copolymers including coverage of polyester miktoarm star copolymers. These macromolecular materials are further categorized by core molecules, catalysts employed, self-assembly and degradation properties and the resulting fields of application (262 references).
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Affiliation(s)
- Donald J A Cameron
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI, Canada C1A 4P3
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31
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Wan D, Pu H, Jin M, Pan H, Chang Z. Enhancing the unimolecularity and control for guest release of a macromolecular nanocapsule via core engineering. REACT FUNCT POLYM 2010. [DOI: 10.1016/j.reactfunctpolym.2010.09.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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32
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Park J, Moon M, Seo M, Choi H, Kim SY. Well-Defined Star-Shaped Rod−Coil Diblock Copolymers as a New Class of Unimolecular Micelles: Encapsulation of Guests and Thermoresponsive Phase Transition. Macromolecules 2010. [DOI: 10.1021/ma101567p] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeyoung Park
- Department of Chemistry, KAIST, Daejeon 305-701, Korea
| | - Mihee Moon
- Department of Chemistry, KAIST, Daejeon 305-701, Korea
| | - Myungeun Seo
- Department of Chemistry, KAIST, Daejeon 305-701, Korea
| | - Hyungsam Choi
- Department of Chemistry, KAIST, Daejeon 305-701, Korea
| | - Sang Youl Kim
- Department of Chemistry, KAIST, Daejeon 305-701, Korea
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Wolf FK, Fischer AM, Frey H. Poly(glycolide) multi-arm star polymers: Improved solubility via limited arm length. Beilstein J Org Chem 2010; 6. [PMID: 20703381 PMCID: PMC2919268 DOI: 10.3762/bjoc.6.67] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2010] [Accepted: 06/02/2010] [Indexed: 11/23/2022] Open
Abstract
Due to the low solubility of poly(glycolic acid) (PGA), its use is generally limited to the synthesis of random copolyesters with other hydroxy acids, such as lactic acid, or to applications that permit direct processing from the polymer melt. Insolubility is generally observed for PGA when the degree of polymerization exceeds 20. Here we present a strategy that allows the preparation of PGA-based multi-arm structures which significantly exceed the molecular weight of processable oligomeric linear PGA (<1000 g/mol). This was achieved by the use of a multifunctional hyperbranched polyglycerol (PG) macroinitiator and the tin(II)-2-ethylhexanoate catalyzed ring-opening polymerization of glycolide in the melt. With this strategy it is possible to combine high molecular weight with good molecular weight control (up to 16,000 g/mol, PDI = 1.4-1.7), resulting in PGA multi-arm star block copolymers containing more than 90 wt % GA. The successful linkage of PGA arms and PG core via this core first/grafting from strategy was confirmed by detailed NMR and SEC characterization. Various PG/glycolide ratios were employed to vary the length of the PGA arms. Besides fluorinated solvents, the materials were soluble in DMF and DMSO up to an average arm length of 12 glycolic acid units. Reduction in the T(g) and the melting temperature compared to the homopolymer PGA should lead to simplified processing conditions. The findings contribute to broadening the range of biomedical applications of PGA.
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Affiliation(s)
- Florian K Wolf
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
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