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Concentration Effect over Thermoresponse Derived from Organometallic Compounds of Functionalized Poly( N-isopropylacrylamide- co-dopamine Methacrylamide). Polymers (Basel) 2021; 13:polym13223921. [PMID: 34833220 PMCID: PMC8620241 DOI: 10.3390/polym13223921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/08/2021] [Accepted: 11/10/2021] [Indexed: 11/17/2022] Open
Abstract
The functionalization of smart polymers is opening a new perspective in catalysis, drug carriers and biosensors, due to the fact that they can modulate the response regarding conventional devices. This smart response could be affected by the presence of organometallic complexes in terms of interactions which could affect the physical chemical properties. In this sense, the thermoresponsive behavior of copolymers based on N-isopropylacrylamide (NIPAM) could be affected due to the presence of hydrophobic groups and concentration effect. In this work, the functionalization of a copolymer based on NIPAM and dopamine methacrylamide with different amounts of bis(cyclopentadienyl)titanium (IV) dichloride was carried out. The resulting materials were characterized, showing a clear idea about the mechanism of functionalization through FTIR spectroscopy. The thermoresponsive behavior was also studied for various polymeric solutions in water by UV-vis spectroscopy and calorimetry. The hydrophobic interactions promoted by the organometallic complex could affect the transition associated with the lower critical solution temperature (LCST), specifically, the segments composed by pure NIPAM. That fact would explain the reduction of the width of the LCST-transition, contrary to what could be expected. In addition, the hydrophobicity was tested by the contact angle and also DNA interactions.
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Gontier A, Renou F, Colombani O, Burel F, Morandi G. Hybridization of Poly(oxazoline) and Poly(ethylene oxide)-Based Amphiphilic Copolymers into Thermosensitive Mixed Micelles of Tunable Cloud Point. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11447-11456. [PMID: 34559542 DOI: 10.1021/acs.langmuir.1c01145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This paper reports the development in aqueous solution of mixed micelles of tunable cloud point temperature through blending in various proportions of two copolymers of different chemical natures. For that purpose, a lipid-b-poly(2-isopropyl-2-oxazoline) (lipid-b-P(iPrOx)) copolymer, self-assembling into thermosensitive micelles that phase-separate above a cloud point temperature of 38 °C, was blended in various proportions with commercial C18-b-PEOx. The latter was constituted of a hydrophobic saturated C18 chain and a hydrophilic poly(ethylene oxide) (PEO) block with varying polymerization degrees (x) and does not have any thermosensitive properties on the studied temperature range for any value of x. The different blends were thoroughly characterized by light scattering and UV-visible spectroscopy, revealing that hybridization between both copolymers always occurred, independent of the PEO block length. The resulting mixed micelles present TCP values progressively increasing with the C18-b-PEOx proportion, from 38 to 61 °C. This study demonstrates the relevance of the blending approach to tune the phase separation of micellar systems by formulation rather than by more tedious synthetic efforts. Shifting TCP through this approach extends the range of temperature where lipid-b-P(iPrOx) can find an application.
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Affiliation(s)
- Alice Gontier
- Normandie Univ, INSA Rouen, Univ Rouen, CNRS, PBS 76000, Rouen, France
| | - Frédéric Renou
- Institut des Molécules et Matériaux du Mans (IMMM), UMR 6283 CNRS Le Mans Université, Avenue Olivier Messiaen 72085,Le Mans Cedex 9, France
| | - Olivier Colombani
- Institut des Molécules et Matériaux du Mans (IMMM), UMR 6283 CNRS Le Mans Université, Avenue Olivier Messiaen 72085,Le Mans Cedex 9, France
| | - Fabrice Burel
- Normandie Univ, INSA Rouen, Univ Rouen, CNRS, PBS 76000, Rouen, France
| | - Gaëlle Morandi
- Normandie Univ, INSA Rouen, Univ Rouen, CNRS, PBS 76000, Rouen, France
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Hydrogen Bonds in Blends of Poly(N-isopropylacrylamide), Poly(N-ethylacrylamide) Homopolymers, and Carboxymethyl Cellulose. JOURNAL OF COMPOSITES SCIENCE 2021. [DOI: 10.3390/jcs5090240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Recently, it was reported that the physical crosslinking exhibited by some biopolymers could provide multiple benefits to biomedical applications. In particular, grafting thermoresponsive polymers onto biopolymers may enhance the degradability or offer other features, as thermothickening behavior. Thus, different interactions will affect the different hydrogen bonds and interactions from the physical crosslinking of carboxymethyl cellulose, the lower critical solution temperatures (LCSTs), and the presence of the ions. This work focuses on the study of blends composed of poly(N-isopropylacrylamide), poly(N-ethylacrylamide), and carboxymethyl cellulose in water and water/methanol. The molecular features, thermoresponsive behavior, and gelation phenomena are deeply studied. The ratio defined by both homopolymers will alter the final properties and the gelation of the final structures, showing that the presence of the hydrophilic groups modifies the number and contributions of the diverse hydrogen bonds.
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Xu S, Trujillo FJ, Xu J, Boyer C, Corrigan N. Influence of Molecular Weight Distribution on the Thermoresponsive Transition of Poly(N-isopropylacrylamide). Macromol Rapid Commun 2021; 42:e2100212. [PMID: 34121259 DOI: 10.1002/marc.202100212] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/09/2021] [Indexed: 11/10/2022]
Abstract
A series of poly(N-isopropylacrylamide) (PNIPAm) homopolymers with narrow molecular weight distributions (MWDs) is prepared via photoinduced electron/energy transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization. The thermal transition temperature of these polymer samples is analyzed via turbidity measurements in water/N,N'-dimethylformamide mixtures, which show that the cloud point temperatures are inversely proportional to the weight average molecular weight (Mw ). Binary mixtures of the narrowly distributed PNIPAm samples are also prepared and the statistical parameters for the MWDs of these blends are determined. Very interestingly, for binary blends of the PNIPAm samples, the thermoresponsive transition is not only dependent on the Mw , which has been shown previously, but also on higher order statistical parameters of the MWDs. Specifically, at very high values of skewness and kurtosis, the polymer blends deviate from a single sharp thermoresponsive transition toward a broader thermal response, and eventually to a regime of two more distinct transitions. This work highlights the importance of in-depth characterization of polymer MWDs for thermoresponsive polymers.
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Affiliation(s)
- Sihao Xu
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.,Cluster for Advanced Macromolecular Design, University of New South Wales, Sydney, NSW, 2052, Australia.,Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Francisco J Trujillo
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Jiangtao Xu
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.,Cluster for Advanced Macromolecular Design, University of New South Wales, Sydney, NSW, 2052, Australia.,Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Cyrille Boyer
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.,Cluster for Advanced Macromolecular Design, University of New South Wales, Sydney, NSW, 2052, Australia.,Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Nathaniel Corrigan
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.,Cluster for Advanced Macromolecular Design, University of New South Wales, Sydney, NSW, 2052, Australia.,Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW, 2052, Australia
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Liang W, García‐Peñas A, Sharma G, Kumar A, Stadler FJ. Competition between Physical Cross‐Linking and Phase Transition Temperature in Blends Based on Poly(
N
‐isopropylacrylamide‐co‐
N
‐ethylacrylamide) Copolymers and Carboxymethyl Cellulose. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000081] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Weijun Liang
- College of Materials Science and EngineeringShenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsNanshan District Key Laboratory for Biopolymers and Safety EvaluationShenzhen University Shenzhen 518055 P. R. China
| | - Alberto García‐Peñas
- College of Materials Science and EngineeringShenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsNanshan District Key Laboratory for Biopolymers and Safety EvaluationShenzhen University Shenzhen 518055 P. R. China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic EngineeringShenzhen University Shenzhen 518060 P. R. China
- Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química (IAAB)Universidad Carlos III de Madrid Leganés Madrid 28911 Spain
| | - Gaurav Sharma
- College of Materials Science and EngineeringShenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsNanshan District Key Laboratory for Biopolymers and Safety EvaluationShenzhen University Shenzhen 518055 P. R. China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic EngineeringShenzhen University Shenzhen 518060 P. R. China
| | - Amit Kumar
- College of Materials Science and EngineeringShenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsNanshan District Key Laboratory for Biopolymers and Safety EvaluationShenzhen University Shenzhen 518055 P. R. China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic EngineeringShenzhen University Shenzhen 518060 P. R. China
| | - Florian J. Stadler
- College of Materials Science and EngineeringShenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsNanshan District Key Laboratory for Biopolymers and Safety EvaluationShenzhen University Shenzhen 518055 P. R. China
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