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Li D, Gao S, Tang Z, Wu H, Zhang Y. Development and Characterization of the Shale Stratum Well Wall Stabilized with Nanosomal Sealing Agent. Polymers (Basel) 2024; 16:1614. [PMID: 38931964 PMCID: PMC11207280 DOI: 10.3390/polym16121614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 05/25/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
The development of micro cracks in shale formations can easily lead to wellbore instability caused by liquid phase invasion. In order to effectively seal the shale micropores, the surface treatment of nano-SiO2 particles was developed using the silicane coupling agent A-1891. Then, the temperature-sensitive polypenic acrylamide polymer was modified onto the surface of the nanoprocal particle through reaction to obtain the nanosomal blocking agent ASN. The infrared spectrum shows that there are chemical bonds between the generated polymer chains, rather than simple physical composites, indicating the successful synthesis of the temperature-responsive nanosealing agent ASN. The particle size analysis showed that the synthesized nanoparticles in ASN have a uniform particle size distribution and display no agglomeration phenomenon. Applying ASN as a sealing agent in drilling fluid effectively fills the nanoscale micropores and microcracks in shale, making shale denser and significantly improving the wellbore stability of shale formations. In addition, it has good temperature resistance, can adapt to reservoirs at different temperatures, is non-toxic and environmentally friendly, and has good prospects for stable applications in shale formation wellbore.
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Affiliation(s)
- Daqi Li
- State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China; (D.L.); (S.G.); (Z.T.); (Y.Z.)
- Sinopec Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206, China
| | - Shuyang Gao
- State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China; (D.L.); (S.G.); (Z.T.); (Y.Z.)
- Sinopec Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206, China
| | - Zhichuan Tang
- State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China; (D.L.); (S.G.); (Z.T.); (Y.Z.)
- Sinopec Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206, China
| | - Huimei Wu
- School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
| | - Yayun Zhang
- State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China; (D.L.); (S.G.); (Z.T.); (Y.Z.)
- Sinopec Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206, China
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Halligan E, Zhuo S, Colbert DM, Alsaadi M, Tie BSH, Bezerra GSN, Keane G, Geever LM. Modulation of the Lower Critical Solution Temperature of Thermoresponsive Poly( N-vinylcaprolactam) Utilizing Hydrophilic and Hydrophobic Monomers. Polymers (Basel) 2023; 15:polym15071595. [PMID: 37050207 PMCID: PMC10096650 DOI: 10.3390/polym15071595] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/23/2023] [Accepted: 03/06/2023] [Indexed: 04/14/2023] Open
Abstract
Four-dimensional printing is primarily based on the concept of 3D printing technology. However, it requires additional stimulus and stimulus-responsive materials. Poly-N-vinylcaprolactam is a temperature-sensitive polymer. Unique characteristics of poly-N-vinylcaprolactam -based hydrogels offer the possibility of employing them in 4D printing. The main aim of this study is to alter the phase transition temperature of poly-N-vinylcaprolactam hydrogels. This research focuses primarily on incorporating two additional monomers with poly-N-vinylcaprolactam: Vinylacetate and N-vinylpyrrolidone. This work contributes to this growing area of research by altering (increasing and decreasing) the lower critical solution temperature of N-vinylcaprolactam through photopolymerisation. Poly-N-vinylcaprolactam exhibits a lower critical solution temperature close to the physiological temperature range of 34-37 °C. The copolymers were analysed using various characterisation techniques, such as FTIR, DSC, and UV-spectrometry. The main findings show that the inclusion of N-vinylpyrrolidone into poly-N-vinylcaprolactam increased the lower critical solution temperature above the physiological temperature. By incorporating vinylacetate, the lower critical solution temperature dropped to 21 °C, allowing for potential self-assembly of 4D-printed objects at room temperature. In this case, altering the lower critical solution temperature of the material can potentially permit the transformation of the 4D-printed object at a particular temperature.
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Affiliation(s)
- Elaine Halligan
- Polymer, Recycling, Industrial, Sustainability and Manufacturing (PRISM) Center, Technological University of the Shannon: Midlands Midwest, Dublin Road, Athlone, N37 HD68 Co. Westmeath, Ireland
| | - Shuo Zhuo
- Polymer, Recycling, Industrial, Sustainability and Manufacturing (PRISM) Center, Technological University of the Shannon: Midlands Midwest, Dublin Road, Athlone, N37 HD68 Co. Westmeath, Ireland
| | - Declan Mary Colbert
- Polymer, Recycling, Industrial, Sustainability and Manufacturing (PRISM) Center, Technological University of the Shannon: Midlands Midwest, Dublin Road, Athlone, N37 HD68 Co. Westmeath, Ireland
| | - Mohamad Alsaadi
- Polymer, Recycling, Industrial, Sustainability and Manufacturing (PRISM) Center, Technological University of the Shannon: Midlands Midwest, Dublin Road, Athlone, N37 HD68 Co. Westmeath, Ireland
- CONFIRM Centre for Smart Manufacturing, University of Limerick, V94 C928 Co. Limerick, Ireland
| | - Billy Shu Hieng Tie
- Polymer, Recycling, Industrial, Sustainability and Manufacturing (PRISM) Center, Technological University of the Shannon: Midlands Midwest, Dublin Road, Athlone, N37 HD68 Co. Westmeath, Ireland
| | - Gilberto S N Bezerra
- Polymer, Recycling, Industrial, Sustainability and Manufacturing (PRISM) Center, Technological University of the Shannon: Midlands Midwest, Dublin Road, Athlone, N37 HD68 Co. Westmeath, Ireland
| | - Gavin Keane
- Centre for Industrial Service & Design, Technological University of the Shannon: Midlands Midwest, Dublin Road, Athlone, N37 HD68 Co. Westmeath, Ireland
| | - Luke M Geever
- Applied Polymer Technologies Gateway, Material Research Institute, Technological University of the Shannon: Midlands Midwest, Dublin Road, Athlone, N37 HD68 Co. Westmeath, Ireland
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Shen H, Yang Z, Xiong Y, Cao Q, Xu K, Lin M, Zhang J, Dong Z. An organic-based amphiphilic Janus polymer nanosheet: Synthesis, properties, and microscopic dispersion interpretations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Zhuo S, Halligan E, Tie BSH, Breheny C, Geever LM. Lower Critical Solution Temperature Tuning and Swelling Behaviours of NVCL-Based Hydrogels for Potential 4D Printing Applications. Polymers (Basel) 2022; 14:polym14153155. [PMID: 35956668 PMCID: PMC9370960 DOI: 10.3390/polym14153155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/28/2022] [Accepted: 07/30/2022] [Indexed: 11/17/2022] Open
Abstract
The phase transitions of poly (N-vinyl caprolactam) (PNVCL) hydrogels are currently under investigation as possible materials for biomedical applications thanks to their thermosensitive properties. This study aims to use the photopolymerisation process to simulate the 4D printing process. NVCL-based polymers with different thermal properties and swellability were prepared to explore the possibility of synthetic hydrogels being used for 4D printing. In this contribution, the thermal behaviours of novel photopolymerised NVCL-based hydrogels were analysed. The lower critical solution temperature (LCST) of the physically crosslinked gels was detected using differential scanning calorimetry (DSC), ultraviolet (UV) spectroscopy, and cloud point measurement. The chemical structure of the xerogels was characterised by means of Fourier transform infrared spectroscopy (FTIR). Pulsatile swelling studies indicated that the hydrogels had thermo-reversible properties. As a result, the effect of varying the macromolecular monomer concentration was apparent. The phase transition temperature is increased when different concentrations of hydrophilic monomers are incorporated. The transition temperature of the hydrogels may allow for excellent flexibility in tailoring transition for specific applications, while the swelling and deswelling behaviour of the gels is strongly temperature- and monomer feed ratio-dependent.
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Affiliation(s)
- Shuo Zhuo
- Material Research Institute, Technological University of the Shannon, Midlands Midwest, Dublin Road, N37 HD68 Athlone, County Westmeath, Ireland; (E.H.); (B.S.H.T.); (C.B.)
- Correspondence: (S.Z.); (L.M.G.)
| | - Elaine Halligan
- Material Research Institute, Technological University of the Shannon, Midlands Midwest, Dublin Road, N37 HD68 Athlone, County Westmeath, Ireland; (E.H.); (B.S.H.T.); (C.B.)
| | - Billy Shu Hieng Tie
- Material Research Institute, Technological University of the Shannon, Midlands Midwest, Dublin Road, N37 HD68 Athlone, County Westmeath, Ireland; (E.H.); (B.S.H.T.); (C.B.)
| | - Colette Breheny
- Material Research Institute, Technological University of the Shannon, Midlands Midwest, Dublin Road, N37 HD68 Athlone, County Westmeath, Ireland; (E.H.); (B.S.H.T.); (C.B.)
| | - Luke M. Geever
- Applied Polymer Technologies Gateway, Material Research Institute, Technological University of the Shannon, Midlands Midwest, Dublin Road, N37 HD68 Athlone, County Westmeath, Ireland
- Correspondence: (S.Z.); (L.M.G.)
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Wan L, Liang DQ. Inhibition effects of poly(N-vinylcaprolactam)/poly(ε-caprolactone) amphiphilic block copolymers on methane hydrate formation. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.01.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Moraes RM, Carvalho LT, Alves GM, Medeiros SF, Bourgeat-Lami E, Santos AM. Synthesis and Self-Assembly of Poly( N-Vinylcaprolactam)- b-Poly(ε-Caprolactone) Block Copolymers via the Combination of RAFT/MADIX and Ring-Opening Polymerizations. Polymers (Basel) 2020; 12:polym12061252. [PMID: 32486145 PMCID: PMC7362203 DOI: 10.3390/polym12061252] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/25/2020] [Accepted: 05/28/2020] [Indexed: 02/06/2023] Open
Abstract
Well-defined amphiphilic, biocompatible and partially biodegradable, thermo-responsive poly(N-vinylcaprolactam)-b-poly(ε-caprolactone) (PNVCL-b-PCL) block copolymers were synthesized by combining reversible addition-fragmentation chain transfer (RAFT) and ring-opening polymerizations (ROP). Poly(N-vinylcaprolactam) containing xanthate and hydroxyl end groups (X–PNVCL–OH) was first synthesized by RAFT/macromolecular design by the interchange of xanthates (RAFT/MADIX) polymerization of NVCL mediated by a chain transfer agent containing a hydroxyl function. The xanthate-end group was then removed from PNVCL by a radical-induced process. Finally, the hydroxyl end-capped PNVCL homopolymer was used as a macroinitiator in the ROP of ε-caprolactone (ε-CL) to obtain PNVCL-b-PCL block copolymers. These (co)polymers were characterized by Size Exclusion Chromatography (SEC), Fourier-Transform Infrared spectroscopy (FTIR), Proton Nuclear Magnetic Resonance spectroscopy (1H NMR), UV–vis and Differential Scanning Calorimetry (DSC) measurements. The critical micelle concentration (CMC) of the block copolymers in aqueous solution measured by the fluorescence probe technique decreased with increasing the length of the hydrophobic block. However, dynamic light scattering (DLS) demonstrated that the size of the micelles increased with increasing the proportion of hydrophobic segments. The morphology observed by cryo-TEM demonstrated that the micelles have a pointed-oval-shape. UV–vis and DLS analyses showed that these block copolymers have a temperature-responsive behavior with a lower critical solution temperature (LCST) that could be tuned by varying the block copolymer composition.
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Affiliation(s)
- Rodolfo M. Moraes
- Laboratory of Polymers, Department of Chemical Engineering, Engineering School of Lorena, University of São Paulo, EEL-USP, Estrada Municipal do Campinho, s/n, P.O. Box 116, Lorena SP 12602-810, Brazil; (R.M.M.); (L.T.C.); (G.M.A.); (S.F.M.)
| | - Layde T. Carvalho
- Laboratory of Polymers, Department of Chemical Engineering, Engineering School of Lorena, University of São Paulo, EEL-USP, Estrada Municipal do Campinho, s/n, P.O. Box 116, Lorena SP 12602-810, Brazil; (R.M.M.); (L.T.C.); (G.M.A.); (S.F.M.)
| | - Gizelda M. Alves
- Laboratory of Polymers, Department of Chemical Engineering, Engineering School of Lorena, University of São Paulo, EEL-USP, Estrada Municipal do Campinho, s/n, P.O. Box 116, Lorena SP 12602-810, Brazil; (R.M.M.); (L.T.C.); (G.M.A.); (S.F.M.)
| | - Simone F. Medeiros
- Laboratory of Polymers, Department of Chemical Engineering, Engineering School of Lorena, University of São Paulo, EEL-USP, Estrada Municipal do Campinho, s/n, P.O. Box 116, Lorena SP 12602-810, Brazil; (R.M.M.); (L.T.C.); (G.M.A.); (S.F.M.)
| | - Elodie Bourgeat-Lami
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), 43 Bvd. du 11 Novembre 1918, F-69616 Villeurbanne, France
- Correspondence: (E.B.-L.); (A.M.S.)
| | - Amilton M. Santos
- Laboratory of Polymers, Department of Chemical Engineering, Engineering School of Lorena, University of São Paulo, EEL-USP, Estrada Municipal do Campinho, s/n, P.O. Box 116, Lorena SP 12602-810, Brazil; (R.M.M.); (L.T.C.); (G.M.A.); (S.F.M.)
- Correspondence: (E.B.-L.); (A.M.S.)
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Carvalho LT, Moraes RM, Alves GM, Lacerda TM, Santos JC, Santos AM, Medeiros SF. Synthesis of amphiphilic pullulan-graft-poly(ε-caprolactone) via click chemistry. Int J Biol Macromol 2020; 145:701-711. [DOI: 10.1016/j.ijbiomac.2019.12.207] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 12/09/2019] [Accepted: 12/23/2019] [Indexed: 10/25/2022]
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8
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Micellization of novel biocompatible thermo-sensitive graft copolymers based on poly(ε-caprolactone), poly(N-vinylcaprolactam) and poly(N-vinylpyrrolidone). Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.07.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Sta M, Aguiar G, Forni AAJ, Medeiros SF, Santos AM, Demarquette NR. Design and characterization of PNVCL‐based nanofibers and evaluation of their potential applications as scaffolds for surface drug delivery of hydrophobic drugs. J Appl Polym Sci 2019. [DOI: 10.1002/app.48472] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Marwa Sta
- École de Technologie Superieure (ÉTS), Mechanical Engineering Department 1100 rue Notre‐Dame Ouest Montréal (Québec) H3C 1 K3 Canada
| | - Graziele Aguiar
- École de Technologie Superieure (ÉTS), Mechanical Engineering Department 1100 rue Notre‐Dame Ouest Montréal (Québec) H3C 1 K3 Canada
- Escola de Engenharia de Lorena, Universidade de São Paulo, Chemical Engineering Department, USP Lorena SP Brazil
| | - Abilio A. J. Forni
- Escola de Engenharia de Lorena, Universidade de São Paulo, Chemical Engineering Department, USP Lorena SP Brazil
| | - Simone F. Medeiros
- Escola de Engenharia de Lorena, Universidade de São Paulo, Chemical Engineering Department, USP Lorena SP Brazil
| | - Amilton M. Santos
- Escola de Engenharia de Lorena, Universidade de São Paulo, Chemical Engineering Department, USP Lorena SP Brazil
| | - Nicole R. Demarquette
- École de Technologie Superieure (ÉTS), Mechanical Engineering Department 1100 rue Notre‐Dame Ouest Montréal (Québec) H3C 1 K3 Canada
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Atomistic molecular dynamics simulations of the LCST conformational transition in poly(N-vinylcaprolactam) in water. J Mol Graph Model 2019; 90:51-58. [PMID: 31009934 DOI: 10.1016/j.jmgm.2019.04.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 04/06/2019] [Accepted: 04/09/2019] [Indexed: 11/22/2022]
Abstract
Thermoresponsive poly(N-vinylcaprolactam) (PVCL) has received growing interest due to a temperature-induced phase transition, which switches its solubility in aqueous solutions. However, the lower critical solution temperature (LCST) of PVCL is greatly influenced by the molecular weight, morphology and the environment. Therefore, despite of numerous experimental studies of the thermal response of PVCL, a driving force and a molecular origin of conformation transitions in solution remain far less studied. To get a better understanding of the coil-to-globule conformation transition of PVCL in aqueous solution, we examined the structure and conformation dynamics of a single-chain PVCL30 in a temperature range of 280-360 K by using atomistic molecular dynamics (MD) simulations. The united-atom GROMOS G53a6 force field was re-parameterized and fine-tuned by DFT calculations to reproduce the experimental LCST transition of PVCL. Our MD model reproduces the LCST transition of PVCL30 to occur within a temperature range of 34.6-38.5°. MD simulation results suggest a significant difference between the hydration state of the carbonyl group of PVCL below and above the LCST threshold. The analysis of the number of hydrogen bonds of PVCL with water molecules demonstrates that dehydration of the polymer plays an important role and drives the temperature-induced polymer collapse. Finally, the developed MD model and FF parameters were successfully tested for large-scale systems, such as mixture PVCL30 oligomer and single-chain PVCL816 polymer, respectively.
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Vanparijs N, Nuhn L, De Geest BG. Transiently thermoresponsive polymers and their applications in biomedicine. Chem Soc Rev 2018; 46:1193-1239. [PMID: 28165097 DOI: 10.1039/c6cs00748a] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The focus of this review is on the class of transiently thermoresponsive polymers. These polymers are thermoresponsive, but gradually lose this property upon chemical transformation - often a hydrolysis reaction - in the polymer side chain or backbone. An overview of the different approaches used for the design of these polymers along with their physicochemical properties is given. Their amphiphilic properties and degradability into fully soluble compounds make this class of responsive polymers attractive for drug delivery and tissue engineering applications. Examples of these are also provided in this review.
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Affiliation(s)
- Nane Vanparijs
- Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Lutz Nuhn
- Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Bruno G De Geest
- Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
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12
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Halligan SC, Dalton MB, Murray KA, Dong Y, Wang W, Lyons JG, Geever LM. Synthesis, characterisation and phase transition behaviour of temperature-responsive physically crosslinked poly (N-vinylcaprolactam) based polymers for biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017. [PMID: 28628999 DOI: 10.1016/j.msec.2017.03.241] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Poly (N-vinylcaprolactam) (PNVCL) is a polymer which offers superior characteristics for various potential medical device applications. In particular it offers unique thermoresponsive capabilities, which fulfils the material technology constraints required in targeted drug delivery applications. PNVCL phase transitions can be tailored in order to suit the requirements of current and next generation devices, by modifying the contents with regard to the material composition and aqueous polymer concentration. In this study, physically crosslinked Poly (N-vinylcaprolactam)-Vinyl acetate (PNVCL-VAc) copolymers were prepared by photopolymerisation. The structure of the polymers was established by Fourier transform infrared spectroscopy, nuclear magnetic resonance and gel permeation chromatography. The polymers were further characterised using differential scanning calorimetry and swelling studies. Determination of the LCST of the polymers in aqueous solution was achieved by employing four techniques; cloud point, UV-spectrometry, differential scanning calorimetry and rheometry. Sol-gel transition was established using tube inversion method and rheological analysis. This study was conducted to determine the characteristics of PNVCL with the addition of VAc, and to establish the effects on the phase transition. The PNVCL based polymers exhibited a decrease in the LCST as the composition of VAc increased. Sol-gel transition could be controlled by altering the monomeric feed ratio and polymer concentration in aqueous milieu. Importantly all copolymers (10wt% in solution) underwent gelation between 33.6 and 35.9°C, and based on this and the other materials properties recorded in this study, these novel copolymers have potential for use as injectable in situ forming drug delivery systems for targeted drug delivery.
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Affiliation(s)
- Shane C Halligan
- Applied Polymer Technologies Gateway, Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland
| | - Maurice B Dalton
- Applied Polymer Technologies Gateway, Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland
| | - Kieran A Murray
- Applied Polymer Technologies Gateway, Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland
| | - Yixiao Dong
- Stanford University School of Medicine, Department of Surgery, 257 Campus Drive, GK-210, Stanford, CA 94305-5148, USA
| | - Wenxin Wang
- Charles Institute of Dermatology, School of Medicine and Medical Science, University College Dublin, Ireland
| | - John G Lyons
- Applied Polymer Technologies Gateway, Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland
| | - Luke M Geever
- Applied Polymer Technologies Gateway, Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland.
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Kawatani R, Kan K, Kelland MA, Akashi M, Ajiro H. Remarkable Effect on Thermosensitive Behavior Regarding Alkylation at the Amide Position of Poly(N-vinylamide)s. CHEM LETT 2016. [DOI: 10.1246/cl.160145] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Ryo Kawatani
- Graduate School of Materials Science, Nara Institute of Science and Technology
| | - Kai Kan
- Institute for Research Initiatives, Nara Institute of Science and Technology
| | - Malcolm A. Kelland
- Department of Mathematics and Natural Sciences, Faculty of Science and Technology, University of Stavanger
| | - Mitsuru Akashi
- Graduate School of Frontier Biosciences, Osaka University
| | - Hiroharu Ajiro
- Graduate School of Materials Science, Nara Institute of Science and Technology
- Institute for Research Initiatives, Nara Institute of Science and Technology
- JST PRESTO
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14
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Cortez-Lemus NA, Licea-Claverie A. Poly(N-vinylcaprolactam), a comprehensive review on a thermoresponsive polymer becoming popular. Prog Polym Sci 2016. [DOI: 10.1016/j.progpolymsci.2015.08.001] [Citation(s) in RCA: 240] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Synthesis and characterization of four- and six-arm star-shaped poly(ε-caprolactone)-b-poly(N-vinylcaprolactam): Micellar and core degradation studies. REACT FUNCT POLYM 2015. [DOI: 10.1016/j.reactfunctpolym.2015.01.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Well-defined poly(DL-lactide)-b-poly(N-vinylcaprolactam) copolymers: synthesis, solution properties and in vitro degradation. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0549-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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