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Puertas-Bartolomé M, Włodarczyk-Biegun MK, Del Campo A, Vázquez-Lasa B, San Román J. Development of bioactive catechol functionalized nanoparticles applicable for 3D bioprinting. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 131:112515. [PMID: 34857294 DOI: 10.1016/j.msec.2021.112515] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 10/19/2021] [Accepted: 10/22/2021] [Indexed: 12/11/2022]
Abstract
Efficient wound treatments to target specific events in the healing process of chronic wounds constitute a significant aim in regenerative medicine. In this sense, nanomedicine can offer new opportunities to improve the effectiveness of existing wound therapies. The aim of this study was to develop catechol bearing polymeric nanoparticles (NPs) and to evaluate their potential in the field of wound healing. Thus, NPs wound healing promoting activities, potential for drug encapsulation and controlled release, and further incorporation in a hydrogel bioink formulation to fabricate cell-laden 3D scaffolds are studied. NPs with 2 and 29 M % catechol contents (named NP2 and NP29) were obtained by nanoprecipitation and presented hydrodynamic diameters of 100 and 75 nm respectively. These nanocarriers encapsulated the hydrophobic compound coumarin-6 with 70% encapsulation efficiency values. In cell culture studies, the NPs had a protective effect in RAW 264.7 macrophages against oxidative stress damage induced by radical oxygen species (ROS). They also presented a regulatory effect on the inflammatory response of stimulated macrophages and promoted upregulation of the vascular endothelial growth factor (VEGF) in fibroblasts and endothelial cells. In particular, NP29 were used in a hydrogel bioink formulation using carboxymethyl chitosan and hyaluronic acid as polymeric matrices. Using a reactive mixing bioprinting approach, NP-loaded hydrogel scaffolds with good structural integrity, shape fidelity and homogeneous NPs dispersion, were obtained. The in vitro catechol NPs release profile of the printed scaffolds revealed a sustained delivery. The bioprinted scaffolds supported viability and proliferation of encapsulated L929 fibroblasts over 14 days. We envision that the catechol functionalized NPs and resulting bioactive bioink presented in this work offer promising advantages for wound healing applications, as they: 1) support controlled release of bioactive catechol NPs to the wound site; 2) can incorporate additional therapeutic functions by co-encapsulating drugs; 3) can be printed into 3D scaffolds with tailored geometries based on patient requirements.
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Affiliation(s)
- María Puertas-Bartolomé
- Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain; CIBER's Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Health Institute Carlos III, Monforte de Lemos 3-5, 28029 Madrid, Spain; INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | | | - Aránzazu Del Campo
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany; Chemistry Department, Saarland University, 66123 Saarbrücken, Germany
| | - Blanca Vázquez-Lasa
- Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain; CIBER's Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Health Institute Carlos III, Monforte de Lemos 3-5, 28029 Madrid, Spain.
| | - Julio San Román
- Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain; CIBER's Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Health Institute Carlos III, Monforte de Lemos 3-5, 28029 Madrid, Spain
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2
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Agnihotri P, Raj R, Kumar D, Dan A. Short oligo(ethylene glycol) chain incorporated thermoresponsive microgels: from structural analysis to modulation of solution properties. SOFT MATTER 2020; 16:7845-7859. [PMID: 32756713 DOI: 10.1039/d0sm01187h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Herein, we report synthesis of thermoresponsive poly(N-isopropylaccrylamide) (PNIPAM) microgels with short oligo(ethylene glycol) (OEG) chain comonomers (1 to 4/5 repeating unit) by surfactant-free precipitation copolymerization. The efficient incorporation of the comonomers was confirmed by a complete set of characterization methods viz., FTIR, 1H NMR, TEM, DLS, and viscometry. The structural heterogeneity and the distribution of the comonomers within the microgels were determined by means of 1H high-resolution transverse relaxation magnetization measurements. Interestingly, the incorporation of these short OEG chain comonomers led to the formation of a core-corona structure, in which the comonomers were mainly located in the core of the polymeric network with PNIPAM dangling chains at the microgel periphery. The experimental investigations of deswelling behaviours revealed that the OEG chains allowed precise control over the colloidal properties, including phase transition, particles size, swelling degree and polydispersity of the microgels. The tuneability of these properties that was interpreted in terms of polymeric hydrophobic/hydrophilic balance as well as structural diversity, could be achieved by changing the OEG chain length, comonomer feed and crosslinking density. Further, we found that the microgels with more hydrophilic OEG chains were able to show a higher relative swelling, and the same solid content thus led to a higher viscosity at all temperatures. The OEG chains remarkably improved the colloidal stability of the microgels in electrolyte solutions even at higher temperatures, thereby paving the way for the use of these microgels in a range of applications.
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Affiliation(s)
- Priyanshi Agnihotri
- Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University - Chandigarh, Sector 14, Chandigarh 160014, India.
| | - Ritu Raj
- Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raibareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Dinesh Kumar
- Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raibareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Abhijit Dan
- Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University - Chandigarh, Sector 14, Chandigarh 160014, India.
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Gumerov RA, Gau E, Xu W, Melle A, Filippov SA, Sorokina AS, Wolter NA, Pich A, Potemkin II. Amphiphilic PVCL/TBCHA microgels: From synthesis to characterization in a highly selective solvent. J Colloid Interface Sci 2020; 564:344-356. [DOI: 10.1016/j.jcis.2019.12.123] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 12/26/2019] [Accepted: 12/27/2019] [Indexed: 10/25/2022]
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4
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Peng J, Tang D, Lv H, Wang N, Yang X, Sun Z, Yu Z. Thermal phase transition of poly(N-vinyl caprolactam)-based copolymers: the distribution of hydrophilic units within polymeric chains. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04537-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bravi Costantino ML, Oberti TG, Cortizo AM, Cortizo MS. Matrices based on lineal and star fumarate-metha/acrylate copolymers for bone tissue engineering: Characterization and biocompatibility studies. J Biomed Mater Res A 2018; 107:195-203. [DOI: 10.1002/jbm.a.36554] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 09/18/2018] [Accepted: 09/18/2018] [Indexed: 11/09/2022]
Affiliation(s)
- M. Leticia Bravi Costantino
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA); Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET CCT-La Plata; CC 16 Sucursal 4, 1900 La Plata Argentina
| | - Tamara G Oberti
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA); Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET CCT-La Plata; CC 16 Sucursal 4, 1900 La Plata Argentina
| | - Ana M. Cortizo
- Laboratorio de Investigaciones en Osteopatías y Metabolismo Mineral (LIOMM), Departamento de Cs. Biológicas, Facultad de Cs. Exactas; UNLP; La Plata Argentina
| | - M. Susana Cortizo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA); Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET CCT-La Plata; CC 16 Sucursal 4, 1900 La Plata Argentina
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Puertas-Bartolomé M, Vázquez-Lasa B, San Román J. Bioactive and Bioadhesive Catechol Conjugated Polymers for Tissue Regeneration. Polymers (Basel) 2018; 10:polym10070768. [PMID: 30960693 PMCID: PMC6403640 DOI: 10.3390/polym10070768] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/03/2018] [Accepted: 07/11/2018] [Indexed: 01/12/2023] Open
Abstract
The effective treatment of chronic wounds constitutes one of the most common worldwide healthcare problem due to the presence of high levels of proteases, free radicals and exudates in the wound, which constantly activate the inflammatory system, avoiding tissue regeneration. In this study, we describe a multifunctional bioactive and resorbable membrane with in-built antioxidant agent catechol for the continuous quenching of free radicals as well as to control inflammatory response, helping to promote the wound-healing process. This natural polyphenol (catechol) is the key molecule responsible for the mechanism of adhesion of mussels providing also the functionalized polymer with bioadhesion in the moist environment of the human body. To reach that goal, synthesized statistical copolymers of N-vinylcaprolactam (V) and 2-hydroxyethyl methacrylate (H) have been conjugated with catechol bearing hydrocaffeic acid (HCA) molecules with high yields. The system has demonstrated good biocompatibility, a sustained antioxidant response, an anti-inflammatory effect, an ultraviolet (UV) screen, and bioadhesion to porcine skin, all of these been key features in the wound-healing process. Therefore, these novel mussel-inspired materials have an enormous potential for application and can act very positively, favoring and promoting the healing effect in chronic wounds.
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Affiliation(s)
- María Puertas-Bartolomé
- Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain.
- CIBER's Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Health Institute Carlos III, C/Monforte de Lemos 3-5, Pabellón 11, 28029 Madrid, Spain.
| | - Blanca Vázquez-Lasa
- Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain.
- CIBER's Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Health Institute Carlos III, C/Monforte de Lemos 3-5, Pabellón 11, 28029 Madrid, Spain.
| | - Julio San Román
- Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain.
- CIBER's Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Health Institute Carlos III, C/Monforte de Lemos 3-5, Pabellón 11, 28029 Madrid, Spain.
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Morelli A, Puppi D, Cheptene V, Disgraziati D, Ruggeri G, Chiellini F. Design, Preparation, and Characterization of Thermoresponsive Hybrid Nanogels Using a Novel Ulvan‐Acrylate Crosslinker as Potential Carriers for Protein Encapsulation. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201700631] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Andrea Morelli
- BIOLab Research GroupDepartment of Chemistry and Industrial ChemistryUniversity of Pisa UdR‐INSTM PISA via Moruzzi 13 56124 Pisa Italy
| | - Dario Puppi
- BIOLab Research GroupDepartment of Chemistry and Industrial ChemistryUniversity of Pisa UdR‐INSTM PISA via Moruzzi 13 56124 Pisa Italy
| | - Victoria Cheptene
- BIOLab Research GroupDepartment of Chemistry and Industrial ChemistryUniversity of Pisa UdR‐INSTM PISA via Moruzzi 13 56124 Pisa Italy
| | - Dunia Disgraziati
- BIOLab Research GroupDepartment of Chemistry and Industrial ChemistryUniversity of Pisa UdR‐INSTM PISA via Moruzzi 13 56124 Pisa Italy
| | - Giacomo Ruggeri
- Department of Chemistry and Industrial ChemistryUniversity of Pisa UdR INSTM Pisa, via Moruzzi 13 56124 Pisa Italy
| | - Federica Chiellini
- BIOLab Research GroupDepartment of Chemistry and Industrial ChemistryUniversity of Pisa UdR‐INSTM PISA via Moruzzi 13 56124 Pisa Italy
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Puertas-Bartolomé M, Fernández-Gutiérrez M, García-Fernández L, Vázquez-Lasa B, San Román J. Biocompatible and bioadhesive low molecular weight polymers containing long-arm catechol-functionalized methacrylate. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2017.11.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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9
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Pichavant L, Guillermain C, Harakat D, Coqueret X. Photo-initiated copolymerization of allyl and vinyl ethers with dialkyl fumarates: A mechanistic investigation by ESI mass spectrometry. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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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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11
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Melle A, Balaceanu A, Kather M, Wu Y, Gau E, Sun W, Huang X, Shi X, Karperien M, Pich A. Stimuli-responsive poly(N-vinylcaprolactam-co-2-methoxyethyl acrylate) core–shell microgels: facile synthesis, modulation of surface properties and controlled internalisation into cells. J Mater Chem B 2016; 4:5127-5137. [DOI: 10.1039/c6tb01196a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Poly(N-vinylcaprolactam-co-2-methoxyethyl acrylate) core–shell microgels as imaging/diagnostic system.
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12
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Li X, Drache M, Gohs U, Beuermann S. Novel concept of polymer electrolyte membranes for high-temperature fuel cells based on ETFE grafted with neutral acrylic monomers. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.07.056] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Sui H, Liu X, Zhong F, Cheng K, Luo Y, Ju X. Polyurethane thermal effects studied using two-dimensional correlation infrared spectroscopy. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2014.08.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Dossi M, Storti G, Moscatelli D. A quantum chemistry study of the free-radical copolymerization propagation kinetics of styrene and 2-hydroxyethyl acrylate. POLYM ENG SCI 2014. [DOI: 10.1002/pen.22045] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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15
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Dai X, Chen X, Yang L, Foster S, Coury AJ, Jozefiak TH. Free radical polymerization of poly(ethylene glycol) diacrylate macromers: impact of macromer hydrophobicity and initiator chemistry on polymerization efficiency. Acta Biomater 2011; 7:1965-72. [PMID: 21232638 DOI: 10.1016/j.actbio.2011.01.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 12/08/2010] [Accepted: 01/05/2011] [Indexed: 12/01/2022]
Abstract
A series of poly(ethylene glycol)-co-poly(lactide) diacrylate macromers was synthesized with variable PEG molecular weights (10 or 20 kDa) and lactate contents (0 or 6 lactates per end group). These macromers were polymerized to form hydrogels by free radical polymerization using either redox or photochemical initiators. The extent of polymerization was determined by monitoring the compressive modulus of the resulting hydrogels and by quantitative determination of unreacted acrylate after exhaustive hydrolysis of the gel. Polymerization efficiency was found to depend on the lactate content of the macromer, with higher lactate macromers giving more efficient polymerization. For redox-initiated polymerization using ferrous gluconate/t-butyl hydroperoxide initiator, macromers containing approximately six lactate repeats per end group required lower concentrations of initiator to reach high conversion than lactate-free macromers. Photochemical polymerization with α,α-dimethoxy-α-phenylacetophenone (Irgacure 651(®)) was found to be less efficient than redox polymerization, requiring the addition of N-vinyl-2- pyrrolidone (NVP) as a co-monomer to achieve conversions comparable with redox polymerization. When conditions were optimized to provide near complete conversion for all gels, the presence of lactate repeat units in the hydrogel was generally found to reduce swelling and increase the compressive modulus. Calculated values of molecular weight between cross-links (M(c)) and mesh size using Flory-Rehner theory showed that macromer molecular weight had the greatest impact on the network structure of the gel.
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Affiliation(s)
- Xiaoshu Dai
- Worcester Polytechnic Institute, Department of Material Science and Engineering, MA 01609, USA
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16
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Photocatalytic Properties of Tin Oxide and Antimony-Doped Tin Oxide Nanoparticles. JOURNAL OF NANOTECHNOLOGY 2011. [DOI: 10.1155/2011/106254] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
For the first time it is shown that N-doped SnO2nanoparticles photocatalyze directly the polymerization of the C=C bonds of (meth)acrylates under visible light illumination. These radical polymerizations also occur when these particles are doped with Sb and when the surfaces of these particles are grafted with methacrylate (MPS) groups. During irradiation with visible or UV light the position and/or intensity of the plasmon band absorption of these nanoparticles are always changed, suggesting that the polymerization starts by the transfer of an electron from the conduction band of the particle to the (meth)acrylate C=C bond. By using illumination wavelengths with a very narrow band width we determined the influence of the incident wavelength of light, the Sb- and N-doping, and the methacrylate (MPS) surface grafting on the quantum efficiencies for the initiating radical formation (Φ) and on the polymer and particle network formation. The results are explained by describing the effects of Sb-doping, N-doping, and/or methacrylate surface grafting on the band gaps, energy level distributions, and surface group reactivities of these nanoparticles. N-doped (MPS grafted) SnO2(Sb ≥ 0%) nanoparticles are new attractive photocatalysts under visible as well as UV illumination.
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Zhang L, Noda I, Wu Y. Concatenated two-dimensional correlation analysis: a new possibility for generalized two-dimensional correlation spectroscopy and its application to the examination of process reversibility. APPLIED SPECTROSCOPY 2010; 64:343-350. [PMID: 20223072 DOI: 10.1366/000370210790918319] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We propose a new application of generalized two-dimensional (2D) correlation spectroscopy called "concatenated" 2D correlation analysis, which is useful in identifying the presence of strict similarity or very subtle difference between two spectral data sets having a similar origin. This approach is very efficient and can offer many potential applications. In this study, the detailed examination of process reversibility is explored. Two forms of concatenation, horizontal and vertical concatenation of data matrices, are introduced and the latter is discussed in detail. Concatenated 2D correlation analysis allows one to investigate directly the correlation between two independent but related spectral data sets. It can extract more detailed information, such as the comparison of effects of two different perturbations or different systems. We describe the principle of the "mirror-image concatenation" in 2D correlation analysis, which is applied to demonstrate its reliability and efficiency on three spectral models: a synthetic simulation data set; experimental Fourier transform infrared (FT-IR) spectra of the thermally induced unfolding-refolding transition of bovine pancreatic ribonuclease A (RNase A) in aqueous solution; and a set of FT-IR spectra of traditional Chinese medicines (TCM) of similar origin. The concatenated 2D correlation analysis shows its power in revealing the irreversibility of the thermally induced conformation transition of RNase A as well as the comparison of different species of TCM.
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Affiliation(s)
- Liping Zhang
- State Key Lab for Supramolecular Structure and Material, Jilin University, No. 2699, Qianjin Street, Changchun, 130012 P.R. China
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18
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Khutoryanskaya OV, Mayeva ZA, Mun GA, Khutoryanskiy VV. Designing temperature-responsive biocompatible copolymers and hydrogels based on 2-hydroxyethyl(meth)acrylates. Biomacromolecules 2010; 9:3353-61. [PMID: 19007281 DOI: 10.1021/bm8006242] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Free-radical copolymerization of 2-hydroxyethyl methacrylate with 2-hydroxyethyl acrylate can be successively utilized for the synthesis of water-soluble polymers and hydrogels with excellent physicochemical properties, thus showing promise for pharmaceutical and biomedical applications. In the work presented it has been demonstrated that water-soluble copolymers based on 2-hydroxyethyl methacrylate and 2-hydroxyethyl acrylate exhibit lower critical solution temperature in aqueous solutions, whereas the corresponding high molecular weight homopolymers do not have this unique property. The temperature-induced transitions observed upon heating the aqueous solutions of these copolymers proceed via liquid-liquid phase separation. The hydrogels were also synthesized by copolymerizing 2-hydroxyethyl methacrylate and 2-hydroxyethyl acrylate in the absence of a bifunctional cross-linker. The cross-linking of these copolymers during copolymerization is believed to be due to the presence of bifunctional admixtures or transesterification reactions. Transparency, swelling behavior, mechanical properties, and porosity of the hydrogels are dependent upon the monomer ratio in the copolymers. Hydrogel samples containing more 2-hydroxyethyl methacrylate are less transparent, have lower swelling capacity, higher elastic moduli, and pores of smaller size. The assessment of the biocompatibility of the copolymers using the slug mucosal irritation test revealed that they are also less irritant than poly(acrylic acid).
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Affiliation(s)
- Olga V Khutoryanskaya
- Reading School of Pharmacy, University of Reading, Whiteknights, P.O. Box 224, RG6 6AD, Reading, United Kingdom
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Photocatalysed (Meth)acrylate Polymerization by (Antimony-Doped) Tin Oxide Nanoparticles and Photoconduction of Their Crosslinked Polymer Nanoparticle Composites. JOURNAL OF NANOTECHNOLOGY 2010. [DOI: 10.1155/2010/579708] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In the absence of another (photo)radical initiator Sb:SnO2nanoparticles (0≤Sb≤13at %) photocatalyze during irradiation with UV light the radical polymerization of (meth)acrylate monomers. When cured hard and transparent (>98%) films with a low haze (<1%) are required, when these particles are grafted in advance with 3-methacryloxypropyltrimethoxysilane (MPS) and doped with Sb. Public knowledge about the photocatalytic properties of Sb:SnO2nanoparticles is hardly available. Therefore, the influence of particle concentration, surface groups, and Sb doping on the rate of C=C (meth)acrylate bond polymerization was determined with aid of real-time FT-IR spectroscopy. By using a wavelength of irradiation with a narrow bandgab (315±5 nm) the influence of these factors on the quantum yield (Φ) and on polymer and particle network structure formation was determined. It is shown that Sb doping and MPS grafting of the particles lowers Φ. MPS grafting of the particles also influences the structure of the polymer network formed. Without Sb doping of these particles unwanted, photocatalytic side reactions occur. It is also shown that cured MPS-Sb:SnO2/(meth)acrylate nanocomposites have photoconduction properties even when the particle concentration is as low as 1 vol.%. The results suggest that the Sb:SnO2(Sb>0at %) nanoparticles can be attractive fillers for other photocatalytic applications photorefractive materials, optoelectronic devices and sensors.
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Pichavant L, Guillermain C, Duchiron S, Coqueret X. Compared Reactivity of Allyl Ribosides in UV-Initiated Free Radical Copolymerization with Acceptor Monomers. Biomacromolecules 2009; 10:400-7. [DOI: 10.1021/bm8011677] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Loic Pichavant
- Université de Reims Champagne Ardenne, Institut de Chimie Moléculaire de Reims CNRS UMR 6229, Moulin de la Housse, BP 1039, 51687 Reims Cedex 2, France
| | - Céline Guillermain
- Université de Reims Champagne Ardenne, Institut de Chimie Moléculaire de Reims CNRS UMR 6229, Moulin de la Housse, BP 1039, 51687 Reims Cedex 2, France
| | - Stéphane Duchiron
- Université de Reims Champagne Ardenne, Institut de Chimie Moléculaire de Reims CNRS UMR 6229, Moulin de la Housse, BP 1039, 51687 Reims Cedex 2, France
| | - Xavier Coqueret
- Université de Reims Champagne Ardenne, Institut de Chimie Moléculaire de Reims CNRS UMR 6229, Moulin de la Housse, BP 1039, 51687 Reims Cedex 2, France
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21
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Kostanski LK, Huang R, Ghosh R, Filipe CDM. Biocompatible poly(N-vinyllactam)-based materials with environmentally-responsive permeability. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2008; 19:275-90. [PMID: 18325231 DOI: 10.1163/156856208783721047] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Biocompatible polymer-based materials whose properties respond to environmental stimuli are of great value in biomedical and biotechnological applications (e.g., controlled release of drugs and sensitive reactants, bioseparations, spontaneous adjusting of flow of liquids including flow control in microfluidic devices). This study describes preparation and properties of biocompatible poly(N-vinyllactam)-based environment responsive composite membranes. The non-charged network N-vinyl lactam polymers form hydrogels that can exhibit swelling and de-swelling behaviour and, thus, regulate porosity of the membrane. The first part of the study has involved investigation of bulk polymerization reactivity of N-vinylcaprolactam (VCL)-based systems. VCL has been combined with up to 20 mol% of N-vinylpyrrolidone (N-vinylbutyrolactam). These synthetic processes have been investigated as thermal polymerizations (with and without a free-radical initiator) and photopolymerizations. Subsequently, the most reactive systems have been used to prepare composite materials by polymerization-modifying borosilicate microfibre membranes. The modified membranes have been characterized by the net mass gain, infrared spectra, and change in permeability in response to changes in ionic strength of the aqueous media. The permeability experiments have been carried out at constant fluxes and the resultant changes in trans-membrane pressure observed. Those membranes that are ionic-strength responsive could potentially be used for bio-separations and other types of biomedical and biotechnological applications.
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Affiliation(s)
- L Kris Kostanski
- Chemical Engineering Department, McMaster University, 1280 Main Street W., Hamilton, Ontario, Canada.
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Multivariate curve resolution-alternating least squares (MCR-ALS) applied to spectroscopic data from monitoring chemical reactions processes. Anal Bioanal Chem 2008; 390:2059-66. [PMID: 18320174 DOI: 10.1007/s00216-008-1955-6] [Citation(s) in RCA: 150] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2007] [Revised: 01/30/2008] [Accepted: 02/07/2008] [Indexed: 10/22/2022]
Abstract
This paper overviews the application of multivariate curve resolution (optimized by alternating least squares) to spectroscopic data acquired by monitoring chemical reactions and other processes. The goals of the resolution methods and the principles for understanding their applications are described. Some of the problems arising from these evolving systems and the limitations of the multivariate curve resolution methods are also discussed. This article reviews most of the applications of multivariate curve resolution applied to reacting systems published between January 2000 and June 2007. Some basic papers dated before 2000 have also been included.
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Zhang X, Li ZC, Li KB, Lin S, Du FS, Li FM. Donor/acceptor vinyl monomers and their polymers: Synthesis, photochemical and photophysical behavior. Prog Polym Sci 2006. [DOI: 10.1016/j.progpolymsci.2006.08.009] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bencini M, Ranucci E, Ferruti P, Oldani C, Licandro E, Maiorana S. Synthesis of 3,3-Di(ethoxycarbonyl)-1-vinylpyrrolidin-2-one and Determination of Its Reactivity Ratios with 1-Vinylpyrrolidin-2-one. Macromolecules 2005. [DOI: 10.1021/ma050422z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marco Bencini
- Dipartimento di Chimica Organica e Industriale, Centro Interdisciplinare Materiali e Interface NanostrutturatiCIMAINA, via Venezian 21, 20133 Milano, Italy
| | - Elisabetta Ranucci
- Dipartimento di Chimica Organica e Industriale, Centro Interdisciplinare Materiali e Interface NanostrutturatiCIMAINA, via Venezian 21, 20133 Milano, Italy
| | - Paolo Ferruti
- Dipartimento di Chimica Organica e Industriale, Centro Interdisciplinare Materiali e Interface NanostrutturatiCIMAINA, via Venezian 21, 20133 Milano, Italy
| | - Claudio Oldani
- Dipartimento di Chimica Organica e Industriale, Centro Interdisciplinare Materiali e Interface NanostrutturatiCIMAINA, via Venezian 21, 20133 Milano, Italy
| | - Emanuela Licandro
- Dipartimento di Chimica Organica e Industriale, Centro Interdisciplinare Materiali e Interface NanostrutturatiCIMAINA, via Venezian 21, 20133 Milano, Italy
| | - Stefano Maiorana
- Dipartimento di Chimica Organica e Industriale, Centro Interdisciplinare Materiali e Interface NanostrutturatiCIMAINA, via Venezian 21, 20133 Milano, Italy
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