1
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Zhou W, Zhang R, Cai Z, Wu F, Hu Y, Huang C, Hu K, Chen Y. Preparation and properties of pH-sensitive cationic starch nanoparticles. Food Chem 2024; 437:137916. [PMID: 37944390 DOI: 10.1016/j.foodchem.2023.137916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 10/13/2023] [Accepted: 10/30/2023] [Indexed: 11/12/2023]
Abstract
Environmentally friendly and outstanding pH responsiveness cationic starch nanoparticles (CSNP) were prepared through ethanol precipitation from pH-sensitive starch, which preparation of cationic starch (CS) by grafting copolymerization with dimethylaminoethyl methacrylate (DMAEMA). In this work, CSNP showed a nanometer size and regular sphere, highly free-flowing molecular chains, and outstanding pH responsiveness which was proved by the high stability of its stabilized emulsion through 6 emulsification/ demulsification transition. The result of the SEM and particle size distribution indicated that the size of the CSNP-0 was about 800 nm, and decreased with the DMAEMA increased. Moreover, the CSNP-stabilized emulsion was stable at pH = 7 and pH = 12. However, this emulsion exhibited breakage at pH = 2. In addition, the CSNP-stabilized Pickering emulsion achieved an emulsification/demulsification switching by cycling the pH at least 6 times, during which the average droplet size gradually increased. At pH ≥ 7, the emulsions exhibit shear thinning behavior.
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Affiliation(s)
- Wei Zhou
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan, Guangdong Province 528458, China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan, Guangdong Province 528458, China
| | - Rui Zhang
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan, Guangdong Province 528458, China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan, Guangdong Province 528458, China
| | - Zhen Cai
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan, Guangdong Province 528458, China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan, Guangdong Province 528458, China
| | - Fangfang Wu
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan, Guangdong Province 528458, China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan, Guangdong Province 528458, China
| | - Yong Hu
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan, Guangdong Province 528458, China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan, Guangdong Province 528458, China
| | - Chao Huang
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan, Guangdong Province 528458, China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan, Guangdong Province 528458, China
| | - Kun Hu
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan, Guangdong Province 528458, China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan, Guangdong Province 528458, China.
| | - Yun Chen
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan, Guangdong Province 528458, China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan, Guangdong Province 528458, China.
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2
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Maji S, Jerca VV, Hoogenboom R. Dual pH and thermoresponsive alternating polyampholytes in alcohol/water solvent mixtures. Polym Chem 2020. [DOI: 10.1039/d0py00032a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyampholytes consist of alternating opposite charges were synthesized by alternating RAFT (co)polymerization of cationic and anionic monomers and their pH dependent thermoresponsive behavior in water and alcohol/water solvent mixtures is reported.
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Affiliation(s)
- Samarendra Maji
- Supramolecular Chemistry Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- Ghent
| | - Valentin Victor Jerca
- Supramolecular Chemistry Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- Ghent
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- Ghent
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3
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Zhao X, Abutalip M, Afroz K, Nuraje N. Hydrophobically Modified Polycarboxybetaine: From Living Radical Polymerization to Self-Assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1606-1612. [PMID: 30558424 DOI: 10.1021/acs.langmuir.8b03561] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Polybetaines have received widespread attention due to their smart response properties and structures which resemble biological polymers like peptides and DNA. However, few studies have focused on the controlled synthesis and self-assembly of hydrophobically modified polybetaines due to the difficulty of synthesizing these materials. We report the first molecular weight-controlled synthesis of hydrophobically modified polycarboxybetaines (HMPCB). Poly(dodecyl grafted aminocrotonate -methacrylic acid) (P(DACRO-MAA)) was synthesized via the reversible addition-fragmentation chain-transfer (RAFT) polymerization approach. The two different tautomers of the monomer were also successfully identified and separated via thin layer chromatography (TLC) and column chromatography, making it possible to obtain pure polycarboxybetaine via RAFT synthesis. Both the successfully separated enamine form of the monomer and the resulting polycarboxybetaine were confirmed via FTIR and NMR. The polycarboxybetaine was found to have a low polydispersity (PDI) of 1.214, and its molecular weight was determined as 70590 g/mol via gel permeation chromatography (GPC) measurements. Spherical, rodlike, and fractal assembled structures for the P(DACRO-MAA) were observed with pH change using TEM, zeta sizer, and dynamic light scattering (DLS). The unique self-assembled structures of HMPCB synthesized via RAFT provide an opportunity to understand fundamental polymer science and can be engineered for broad applications.
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Affiliation(s)
- Xiao Zhao
- Department of Chemical Engineering , Texas Tech University , Lubbock , Texas 79409 , United States
| | - Munziya Abutalip
- Department of Chemical Engineering , Texas Tech University , Lubbock , Texas 79409 , United States
- Department of Chemistry and Chemical Technology , al-Farabi Kazakh National University , Almaty , Kazakhstan
| | - Khurshida Afroz
- Department of Chemical Engineering , Texas Tech University , Lubbock , Texas 79409 , United States
| | - Nurxat Nuraje
- Department of Chemical Engineering , Texas Tech University , Lubbock , Texas 79409 , United States
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4
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Dabbaghi A, Rahmani S. Synthesis and characterization of biodegradable multicomponent amphiphilic conetworks with tunable swelling through combination of ring-opening polymerization and “click” chemistry method as a controlled release formulation for 2,4-dichlorophenoxyacetic a. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4474] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Alaleh Dabbaghi
- Laboratory of Polymer Synthesis, Department of Chemistry, Faculty of Science; University of Zanjan; Zanjan Iran
| | - Sohrab Rahmani
- Laboratory of Polymer Synthesis, Department of Chemistry, Faculty of Science; University of Zanjan; Zanjan Iran
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5
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Wang HC, Grolman JM, Rizvi A, Hisao GS, Rienstra CM, Zimmerman SC. pH-Triggered Release from Polyamide Microcapsules Prepared by Interfacial Polymerization of a Simple Diester Monomer. ACS Macro Lett 2017; 6:321-325. [PMID: 35650910 DOI: 10.1021/acsmacrolett.6b00968] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The majority of current pH-triggered release systems is designed to respond to either low or high pH. Encapsulants based on polyampholytes are an example of materials that can respond to both acidic and basic pH. However, polyampholyte-based encapsulants generally possess a low loading capacity and have difficulty retaining their small-molecule cargo. The current work utilizes interfacial polymerization between polyamines and a pyromellitic diester diacid chloride to form high capacity "liquid core-shell" polyamide microcapsules that are stable in a dry or nonpolar environment but undergo steady, controlled release at pH 7.4 and accelerated release at pH 5 and pH 10. The rate of release can be tuned by adjusting the amine cross-linker feed ratio, which varies the degree of cross-linking in the polymer shell. The thin-shell microcapsule exhibited suitable barrier properties and tunable dual acid/base-triggered release, with applications in a wide range of pH environments.
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Affiliation(s)
- Hsuan-Chin Wang
- Department
of Chemistry, ‡Beckman Institute for Advanced Science and Technology, and §Department of
Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Joshua M. Grolman
- Department
of Chemistry, ‡Beckman Institute for Advanced Science and Technology, and §Department of
Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Aoon Rizvi
- Department
of Chemistry, ‡Beckman Institute for Advanced Science and Technology, and §Department of
Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Grant S. Hisao
- Department
of Chemistry, ‡Beckman Institute for Advanced Science and Technology, and §Department of
Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Chad M. Rienstra
- Department
of Chemistry, ‡Beckman Institute for Advanced Science and Technology, and §Department of
Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Steven C. Zimmerman
- Department
of Chemistry, ‡Beckman Institute for Advanced Science and Technology, and §Department of
Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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6
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Constantinou AP, Elladiou M, Patrickios CS. Regular and Inverse Polyampholyte Hydrogels: A Detailed Comparison. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00538] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | - Marios Elladiou
- Department of Chemistry University of Cyprus P.O.
Box 20537 1678 Nicosia Cyprus
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7
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Abdilla A, Shi S, Burke NAD, Stöver HDH. Multistimuli responsive ternary polyampholytes: Formation and crosslinking of coacervates. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28078] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Allison Abdilla
- Department of Chemistry and Chemical Biology; McMaster University; 1280 Main Street West Hamilton Ontario L8S 4M1 Canada
| | - Shanna Shi
- Department of Chemistry and Chemical Biology; McMaster University; 1280 Main Street West Hamilton Ontario L8S 4M1 Canada
| | - Nicholas A. D. Burke
- Department of Chemistry and Chemical Biology; McMaster University; 1280 Main Street West Hamilton Ontario L8S 4M1 Canada
| | - Harald D. H. Stöver
- Department of Chemistry and Chemical Biology; McMaster University; 1280 Main Street West Hamilton Ontario L8S 4M1 Canada
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8
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Rikkou-Kalourkoti M, Kitiri EN, Patrickios CS, Leontidis E, Constantinou M, Constantinides G, Zhang X, Papadakis CM. Double Networks Based on Amphiphilic Cross-Linked Star Block Copolymer First Conetworks and Randomly Cross-Linked Hydrophilic Second Networks. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02490] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Elina N. Kitiri
- Department
of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Costas S. Patrickios
- Department
of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | | | - Marios Constantinou
- Research
Unit for Nanostructured Materials Systems, Department of Mechanical
Engineering and Materials Science and Engineering, Cyprus University of Technology, P.O.
Box 50329, 3603 Limassol, Cyprus
| | - Georgios Constantinides
- Research
Unit for Nanostructured Materials Systems, Department of Mechanical
Engineering and Materials Science and Engineering, Cyprus University of Technology, P.O.
Box 50329, 3603 Limassol, Cyprus
| | - Xiaohan Zhang
- Fachgebiet
Physik weicher Materie, Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Christine M. Papadakis
- Fachgebiet
Physik weicher Materie, Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
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9
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Dyakonova MA, Berezkin AV, Kyriakos K, Gkermpoura S, Popescu MT, Filippov SK, Štěpánek P, Di Z, Tsitsilianis C, Papadakis CM. Salt-Induced Changes in Triblock Polyampholyte Hydrogels: Computer Simulations and Rheological, Structural, and Dynamic Characterization. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01746] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Margarita A. Dyakonova
- Fachgebiet
Physik weicher Materie, Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Anatoly V. Berezkin
- Fachgebiet
Physik weicher Materie, Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Konstantinos Kyriakos
- Fachgebiet
Physik weicher Materie, Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Sandra Gkermpoura
- Department
of Chemical Engineering, University of Patras, 26504 Patras, Greece
| | - Maria T. Popescu
- Department
of Chemical Engineering, University of Patras, 26504 Patras, Greece
| | - Sergey K. Filippov
- Institute
of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, v. v. i., Heyrovský Sq. 2, 162
06 Prague 6, Czech Republic
| | - Petr Štěpánek
- Institute
of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, v. v. i., Heyrovský Sq. 2, 162
06 Prague 6, Czech Republic
| | - Zhenyu Di
- Jülich
Centre for Neutron Science at MLZ, Outstation at MLZ, Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85748 Garching, Germany
| | | | - Christine M. Papadakis
- Fachgebiet
Physik weicher Materie, Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
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10
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Synthesis and characterization of robust double-networks based on end-linked, pH-responsive first networks. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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12
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Wang H, Qin A, Li X, Zhao X, Liu D, He C. Biocompatible amphiphilic conetwork based on crosslinked star copolymers: A potential drug carrier. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27721] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Haiye Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; College of Materials Science and Engineering, Donghua University; 2999 North Renmin Road Songjiang District Shanghai 201620 People's Republic of China
| | - Aiwen Qin
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; College of Materials Science and Engineering, Donghua University; 2999 North Renmin Road Songjiang District Shanghai 201620 People's Republic of China
| | - Xiang Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; College of Materials Science and Engineering, Donghua University; 2999 North Renmin Road Songjiang District Shanghai 201620 People's Republic of China
| | - Xinzhen Zhao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; College of Materials Science and Engineering, Donghua University; 2999 North Renmin Road Songjiang District Shanghai 201620 People's Republic of China
| | - Dapeng Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; College of Materials Science and Engineering, Donghua University; 2999 North Renmin Road Songjiang District Shanghai 201620 People's Republic of China
| | - Chunju He
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; College of Materials Science and Engineering, Donghua University; 2999 North Renmin Road Songjiang District Shanghai 201620 People's Republic of China
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13
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Qiu M, Zhao XZ, Liu DP, He CJ. pH sensitive amphiphilic conetworks based on end-group cross-linking of polydimethylsiloxane pentablock copolymer and polymethylhydrosiloxane. RSC Adv 2015. [DOI: 10.1039/c4ra13866j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of pH-responsive amphiphilic conetworks were synthesized through cross-linking of well-defined amphiphilic pentablock copolymers via atom transfer radical polymerization.
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Affiliation(s)
- Ming Qiu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai
- P. R. China
| | - Xin-Zheng Zhao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai
- P. R. China
| | - Da-Peng Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai
- P. R. China
| | - Chun-Ju He
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai
- P. R. China
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14
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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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15
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Apostolides DE, Patrickios CS, Leontidis E, Kushnir M, Wesdemiotis C. Synthesis and characterization of reversible and self-healable networks based on acylhydrazone groups. POLYM INT 2014. [DOI: 10.1002/pi.4724] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | - Costas S Patrickios
- Department of Chemistry; University of Cyprus; PO Box 20537 1678 Nicosia Cyprus
| | | | - Michelle Kushnir
- Department of Chemistry and Integrated Biosciences Program; University of Akron; Akron OH 44325-3601 USA
| | - Chrys Wesdemiotis
- Department of Chemistry and Integrated Biosciences Program; University of Akron; Akron OH 44325-3601 USA
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16
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Pafiti KS, Elladiou M, Patrickios CS. “Inverse Polyampholyte” Hydrogels from Double-Cationic Hydrogels: Synthesis by RAFT Polymerization and Characterization. Macromolecules 2014. [DOI: 10.1021/ma500084c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kyriaki S. Pafiti
- Department of Chemistry, University of Cyprus,
P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Marios Elladiou
- Department of Chemistry, University of Cyprus,
P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Costas S. Patrickios
- Department of Chemistry, University of Cyprus,
P.O. Box 20537, 1678 Nicosia, Cyprus
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17
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Chen L, Chen T, Fang W, Wen Y, Lin S, Lin J, Cai C. Synthesis and pH-Responsive “Schizophrenic” Aggregation of a Linear-Dendron-Like Polyampholyte Based on Oppositely Charged Polypeptides. Biomacromolecules 2013; 14:4320-30. [DOI: 10.1021/bm401215w] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lili Chen
- Shanghai Key Laboratory of
Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials
of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Tao Chen
- Shanghai Key Laboratory of
Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials
of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Wenxiang Fang
- Shanghai Key Laboratory of
Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials
of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Ying Wen
- Shanghai Key Laboratory of
Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials
of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Shaoliang Lin
- Shanghai Key Laboratory of
Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials
of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Jiaping Lin
- Shanghai Key Laboratory of
Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials
of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Chunhua Cai
- Shanghai Key Laboratory of
Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials
of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
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18
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Affiliation(s)
- Kevin M. Zurick
- Department of Chemical Engineering; University of Missouri; Columbia Missouri 65211
| | - Matthew Bernards
- Department of Chemical Engineering; University of Missouri; Columbia Missouri 65211
- Department of Bioengineering; University of Missouri; Columbia Missouri 65211
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19
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Ghasdian N, Church E, Cottam AP, Hornsby K, Leung MY, Georgiou TK. Novel “core-first” star-based quasi-model amphiphilic polymer networks. RSC Adv 2013. [DOI: 10.1039/c3ra42836b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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20
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Fodor C, Domján A, Iván B. Unprecedented scissor effect of macromolecular cross-linkers on the glass transition temperature of poly(N-vinylimidazole), crystallinity suppression of poly(tetrahydrofuran) and molecular mobility by solid state NMR in poly(N-vinylimidazole)-l-poly(tetrahydrofuran) conetworks. Polym Chem 2013. [DOI: 10.1039/c3py00299c] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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21
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Zhang M, Xiong Q, Chen J, Wang Y, Zhang Q. A novel cyclodextrin-containing pH-responsive star polymer for nanostructure fabrication and drug delivery. Polym Chem 2013. [DOI: 10.1039/c3py00656e] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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22
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Multifunctional drug delivery system for targeting tumor and its acidic microenvironment. J Control Release 2012; 161:884-92. [DOI: 10.1016/j.jconrel.2012.05.013] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 04/20/2012] [Accepted: 05/05/2012] [Indexed: 11/17/2022]
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23
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Lee Y, Geckeler KE. Cellular Interactions of a Water-Soluble Supramolecular Polymer Complex of Carbon Nanotubes with Human Epithelial Colorectal Adenocarcinoma Cells. Macromol Biosci 2012; 12:1060-7. [DOI: 10.1002/mabi.201200085] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Indexed: 11/08/2022]
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24
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Valmikinathan CM, Mukhatyar VJ, Jain A, Karumbaiah L, Dasari M, Bellamkonda RV. Photocrosslinkable chitosan based hydrogels for neural tissue engineering. SOFT MATTER 2012; 8:1964-1976. [PMID: 29805470 PMCID: PMC5969809 DOI: 10.1039/c1sm06629c] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Hydrogel based scaffolds for neural tissue engineering can provide appropriate physico-chemical and mechanical properties to support neurite extension and facilitate transplantation of cells by acting as 'cell delivery vehicles'. Specifically, in situ gelling systems such as photocrosslinkable hydrogels can potentially conformally fill irregular neural tissue defects and serve as stem cell delivery systems. Here, we report the development of a novel chitosan based photocrosslinkable hydrogel system with tunable mechanical properties and degradation rates. A two-step synthesis of amino-ethyl methacrylate derivitized, degradable, photocrosslinkable chitosan hydrogels is described. When human mesenchymal stem cells were cultured in photocrosslinkable chitosan hydrogels, negligible cytotoxicity was observed. Photocrosslinkable chitosan hydrogels facilitated enhanced neurite differentiation from primary cortical neurons and enhanced neurite extension from dorsal root ganglia (DRG) as compared to agarose based hydrogels with similar storage moduli. Neural stem cells (NSCs) cultured within photocrosslinkable chitosan hydrogels facilitated differentiation into tubulin positive neurons and astrocytes. These data demonstrate the potential of photocrosslinked chitosan hydrogels, and contribute to an increasing repertoire of hydrogels designed for neural tissue engineering.
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Affiliation(s)
- Chandra M. Valmikinathan
- Neurological Biomaterials and Cancer Therapeutics Laboratory, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, 3108, UA Whitaker Building, 313 Ferst Drive, Atlanta, Georgia, 30332-0535, USA
| | - Vivek J. Mukhatyar
- Neurological Biomaterials and Cancer Therapeutics Laboratory, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, 3108, UA Whitaker Building, 313 Ferst Drive, Atlanta, Georgia, 30332-0535, USA
| | - Anjana Jain
- Neurological Biomaterials and Cancer Therapeutics Laboratory, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, 3108, UA Whitaker Building, 313 Ferst Drive, Atlanta, Georgia, 30332-0535, USA
| | - Lohitash Karumbaiah
- Neurological Biomaterials and Cancer Therapeutics Laboratory, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, 3108, UA Whitaker Building, 313 Ferst Drive, Atlanta, Georgia, 30332-0535, USA
| | - Madhuri Dasari
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, 3108, UA Whitaker Building, 313 Ferst Drive, Atlanta, Georgia, 30332-0535, USA
| | - Ravi V. Bellamkonda
- Neurological Biomaterials and Cancer Therapeutics Laboratory, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, 3108, UA Whitaker Building, 313 Ferst Drive, Atlanta, Georgia, 30332-0535, USA
- ; Fax: +1 404 385 5044; Tel: +1 404 385 5038
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25
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Rikkou-Kalourkoti M, Matyjaszewski K, Patrickios CS. Synthesis, Characterization and Thermolysis of Hyperbranched Homo- and Amphiphilic Co-Polymers Prepared Using an Inimer Bearing a Thermolyzable Acylal Group. Macromolecules 2012. [DOI: 10.1021/ma202021y] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
| | - Costas S. Patrickios
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia,
Cyprus
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26
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Rikkou-Kalourkoti M, Loizou E, Porcar L, Matyjaszewski K, Patrickios CS. End-linked, amphiphilic, degradable polymer conetworks: synthesis by sequential atom transfer radical polymerization using a bifunctional, cleavable initiator. Polym Chem 2012. [DOI: 10.1039/c1py00349f] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
End-linked amphiphilic conetworks prepared using an ATRP bifunctional, bis(hemiacetal ester) initiator were hydrolyzed by HCl, yielding novel amphiphilic star copolymers.
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Affiliation(s)
| | - Elena Loizou
- Department of Chemistry
- University of Cyprus
- Nicosia
- Cyprus
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27
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Shi B, Shen Z, Zhang H, Bi J, Dai S. Exploring N-imidazolyl-O-carboxymethyl chitosan for high performance gene delivery. Biomacromolecules 2011; 13:146-53. [PMID: 22168363 DOI: 10.1021/bm201380e] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Chitosan shows good biocompatibility and biodegradability, but the poor water solubility and low transfection efficiency hinder its applications as a gene delivery vector. We here report the detailed synthesis and characterization of a novel ampholytical chitosan derivative, N-imidazolyl-O-carboxymethyl chitosan (IOCMCS), used for high performance gene delivery. After chemical modification, the solubility of the resulting polymer is enhanced, and the polymer is soluble in a wide pH range (4-10). Gel electrophoresis study reveals the strong binding ability between plasmid DNA and the IOCMCS. Moreover, the IOCMCS does not induce remarkable cytotoxicity against human embryonic kidney (HEK293T) cells. The cell transfection results with HEK293T cells using the IOCMCS as gene delivery vector demonstrate the high transfection efficiency, which is dependent on the degree of imidazolyl substitution. Therefore, the IOCMCS is a promising candidate as the DNA delivery vector in gene therapy due to its high solubility, high gene binding capability, low cytotoxicity, and high gene transfection efficiency.
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Affiliation(s)
- Bingyang Shi
- School of Chemical Engineering, The University of Adelaide, Adelaide SA5005, Australia
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28
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Lee Y, Geckeler KE. Polyampholyte-Wrapped Carbon Nanotubes: Preparation and Internalization by Embryonic Fibroblast Cells. Macromol Rapid Commun 2011; 32:1518-25. [PMID: 21751277 DOI: 10.1002/marc.201100226] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Revised: 05/27/2011] [Indexed: 12/12/2022]
Abstract
The cytotoxicity and cellular uptake of carbon nanotubes (CNTs) has recently attracted considerable interest because of the issue of biosphere-nanomaterial interactions. The biocompatibility of CNTs is determined by the metal impurities in the CNTs, the size of the CNTs and the CNT dispersion states; in particular, the type of surface modifications on the CNTs affects how they interact with cells and determines their cytotoxicity and cellular uptake. In this study, biocompatible single-walled carbon nanotubes (SWNTs) wrapped with a water-soluble copolymer, poly[2-(dimethylamino)ethyl methacrylate-co-methacrylic acid] (PDM), were prepared. We report that these SWNTs have enhanced water dispersibility and cellular internalization but no significant cytotoxic activity against mouse embryonic fibroblast NIH-3T3 cells.
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Affiliation(s)
- Yeonju Lee
- Department of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju 500-712, South Korea
| | - Kurt E Geckeler
- Department of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju 500-712, South Korea. .,Department of Nanobio Materials and Electronics, World-Class University (WCU), and Institute of Medical System Engineering, Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju 500-712, South Korea.
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29
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Pafiti KS, Philippou Z, Loizou E, Porcar L, Patrickios CS. End-Linked Poly[2-(dimethylamino)ethyl Methacrylate]–Poly(methacrylic acid) Polyampholyte Conetworks: Synthesis by Sequential RAFT Polymerization and Swelling and SANS Characterization. Macromolecules 2011. [DOI: 10.1021/ma200668v] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kyriaki S. Pafiti
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Zelina Philippou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Elena Loizou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Lionel Porcar
- Institute Max von Laue−Paul Langevin, BP 156, F-38042, Grenoble, Cedex 9, France
| | - Costas S. Patrickios
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
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30
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Lin C, Gitsov I. Preparation and Characterization of Novel Amphiphilic Hydrogels with Covalently Attached Drugs and Fluorescent Markers. Macromolecules 2010. [DOI: 10.1021/ma102044n] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Ivan Gitsov
- Department of Chemistry
- The Michael M. Szwarc Polymer Research Institute
- Syracuse Biomaterials Institute, Syracuse, New York 13210, United States
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31
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Raynaud J, Liu N, Gnanou Y, Taton D. Expanding the Scope of Group Transfer Polymerization Using N-Heterocyclic Carbenes as Catalysts: Application to Miscellaneous (Meth)acrylic Monomers and Kinetic Investigations. Macromolecules 2010. [DOI: 10.1021/ma101478p] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jean Raynaud
- Centre National de la Recherche Scientifique, Laboratoire de Chimie des Polymères Organiques, 16 avenue Pey-Berland, F-33607 Pessac cedex, France
- Université de Bordeaux, Laboratoire de Chimie des Polymères Organiques, IPB-ENSCBP, F-33607 Pessac cedex, France
| | - Na Liu
- Centre National de la Recherche Scientifique, Laboratoire de Chimie des Polymères Organiques, 16 avenue Pey-Berland, F-33607 Pessac cedex, France
- Université de Bordeaux, Laboratoire de Chimie des Polymères Organiques, IPB-ENSCBP, F-33607 Pessac cedex, France
| | - Yves Gnanou
- Centre National de la Recherche Scientifique, Laboratoire de Chimie des Polymères Organiques, 16 avenue Pey-Berland, F-33607 Pessac cedex, France
- Université de Bordeaux, Laboratoire de Chimie des Polymères Organiques, IPB-ENSCBP, F-33607 Pessac cedex, France
| | - Daniel Taton
- Centre National de la Recherche Scientifique, Laboratoire de Chimie des Polymères Organiques, 16 avenue Pey-Berland, F-33607 Pessac cedex, France
- Université de Bordeaux, Laboratoire de Chimie des Polymères Organiques, IPB-ENSCBP, F-33607 Pessac cedex, France
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32
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Temperature-swing adsorption of precious metal ions onto poly(2-(dimethylamino)ethyl methacrylate) gel. REACT FUNCT POLYM 2010. [DOI: 10.1016/j.reactfunctpolym.2010.05.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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33
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Georgiou TK, Achilleos DS, Patrickios CS. Multi-Functional Conetworks Based on Cross-Linked Star Polymers. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.201050505] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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34
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Pedrón S, Anseth K, Benton JA, Bosch P, Peinado C. Bioapplications of Networks Based on Photo-Cross-Linked Hyperbranched Polymers. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.201050536] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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35
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Lin C, Gitsov I. Synthesis and Physical Properties of Reactive Amphiphilic Hydrogels Based on Poly(p-chloromethylstyrene) and Poly(ethylene glycol): Effects of Composition and Molecular Architecture. Macromolecules 2010. [DOI: 10.1021/ma9026564] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Ivan Gitsov
- Department of Chemistry
- The Michael M. Szwarc Polymer Research Institute
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36
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Kali G, Georgiou TK, Iván B, Patrickios CS. Anionic amphiphilic end-linked conetworks by the combination of quasiliving carbocationic and group transfer polymerizations. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23481] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Kafouris D, Gradzielski M, Patrickios CS. Semisegmented Amphiphilic Polymer Conetworks: Synthesis and Characterization. Macromolecules 2009. [DOI: 10.1021/ma802859d] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Demetris Kafouris
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus, and Stranski-Laboratorium für Physikalische and Theoretische Chemie, Institut für Chemie, Strasse des 17. Juni 124, Sekr. TC7, Technische Universität Berlin, D-10623 Berlin, Germany
| | - Michael Gradzielski
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus, and Stranski-Laboratorium für Physikalische and Theoretische Chemie, Institut für Chemie, Strasse des 17. Juni 124, Sekr. TC7, Technische Universität Berlin, D-10623 Berlin, Germany
| | - Costas S. Patrickios
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus, and Stranski-Laboratorium für Physikalische and Theoretische Chemie, Institut für Chemie, Strasse des 17. Juni 124, Sekr. TC7, Technische Universität Berlin, D-10623 Berlin, Germany
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38
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Kafouris D, Gradzielski M, Patrickios CS. Synthesis and Characterization of Large-Core Star Polymers and Polymer Networks: Effects of Arm Length and Composition of the Cross-Linking Mixture. MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200800464] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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Convertine AJ, Benoit DSW, Duvall CL, Hoffman AS, Stayton PS. Development of a novel endosomolytic diblock copolymer for siRNA delivery. J Control Release 2009; 133:221-9. [PMID: 18973780 PMCID: PMC3110267 DOI: 10.1016/j.jconrel.2008.10.004] [Citation(s) in RCA: 313] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2008] [Revised: 09/11/2008] [Accepted: 10/05/2008] [Indexed: 12/27/2022]
Abstract
The gene knockdown activity of small interfering RNA (siRNA) has led to their use as target validation tools and as potential therapeutics for a variety of diseases. The delivery of these double-stranded RNA macromolecules has proven to be challenging, however, and in many cases, is a barrier to their deployment. Here we report the development of a new diblock copolymer family that was designed to enhance the systemic and intracellular delivery of siRNA. These diblock copolymers were synthesized using the controlled reversible addition fragmentation chain transfer polymerization (RAFT) method and are composed of a positively-charged block of dimethylaminoethyl methacrylate (DMAEMA) to mediate siRNA condensation, and a second endosomal-releasing block composed of DMAEMA and propylacrylic acid (PAA) in roughly equimolar ratios, together with butyl methacylate (BMA). A related series of diblock compositions were characterized, with the cationic block kept constant, and with the ratio of DMAEMA and PAA to BMA varied. These carriers became sharply hemolytic at endosomal pH regimes, with increasing hemolytic activity seen as the percentage of BMA in the second block was systematically increased. The diblock copolymers condensed siRNA into 80-250 nm particles with slightly positive Zeta potentials. SiRNA-mediated knockdown of a model protein, namely glyceraldehyde 3-phosphate dehydrogenase (GAPDH), in HeLa cells generally followed the hemolytic activity trends, with the most hydrophobic second block (highest BMA content) exhibiting the best knockdown. This pH-responsive carrier designed to mediate endosomal release shows significant promise for the intracellular delivery of siRNA.
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40
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Synthesis and characterization of shell-cross-linked polymer networks and large-core star polymers: Effect of the volume of the cross-linking mixture. Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2008.09.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Rikkou MD, Patrickios CS. Well-Defined Networks with Precisely Located Cleavable Sites: Structure Optimization and Core Functionality Determination. Macromolecules 2008. [DOI: 10.1021/ma801154x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria D. Rikkou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Costas S. Patrickios
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
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42
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Ghosh S. Extraction of Azo Dye Molecules from Aqueous Solution using Polyamidoamine Dendrimer Based Polymeric Network. JOURNAL OF CHEMICAL RESEARCH 2008. [DOI: 10.3184/030823408785702481] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Synthesis of novel polyamidoamine (PAMAM) dendrimer based network polymer 2 based on the reaction between an amine-terminated PAMAM dendrimer 1 (G = 3, ethylenediamine core) and butanediol diglycidylether has been achieved. The divergent approach has been employed for the synthesis of the PAMAM dendrimer 1. This polyamidoamine (PAMAM) dendrimer based network polymer 2 has been successfully characterised by means of FT-IR spectroscopy and elemental analyses and the extraction of methyl orange dye molecules from aqueous solution has been investigated.
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Affiliation(s)
- Samaresh Ghosh
- Department of Chemistry, Bankura Sammilani College, Kenduadihi, Bankura-722102, WB, India
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43
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Chan Y, Wong T, Byrne F, Kavallaris M, Bulmus V. Acid-labile core cross-linked micelles for pH-triggered release of antitumor drugs. Biomacromolecules 2008; 9:1826-36. [PMID: 18564874 DOI: 10.1021/bm800043n] [Citation(s) in RCA: 173] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Micelles of a model amphiphilic block copolymer, poly(hydroxyethyl acrylate)-block-poly(n-butyl acrylate) (PHEA-b-PBA), synthesized via the RAFT polymerization were cross-linked by copolymerization of a degradable cross-linker from the living RAFT-end groups of PBA chains, yielding a cross-linked core without affecting significantly the original micelle size. The cross-linker incorporation into the micelles was evidenced via physicochemical analysis of the copolymer unimers formed upon acidic cleavage of the cross-linked micelles. High doxorubicin loading capacities (60 wt %) were obtained. Hydrolysis of less than half of the cross-links in the core was found to be sufficient to release doxorubicin faster at acidic pH compared to neutral pH. The system represents the first example of core-cross-linked micelles that can be destabilized (potentially both above and below CMC) by the pH-dependent cleavage of the cross-links and the subsequent polarity change in the core to enable the release of hydrophobic drugs entrapped inside the micelle.
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Affiliation(s)
- Yannie Chan
- Centre for Advanced Macromolecular Design, The University of New South Wales, Sydney 2052, NSW, Australia
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44
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Kafouris D, Gradzielski M, Patrickios CS. Hydrophilic, cationic large-core star polymers and polymer networks: Synthesis and physicochemical characterization. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22736] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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