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Martinez AA, Arneodo Larochette PP, Gennari FC, Gasnier A. The Structure-Function Relationship of Branched Polyethylenimine Impregnated over Mesoporous Carbon Aerogels: An In-Depth Thermogravimetric Insight. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17133-17145. [PMID: 37975861 DOI: 10.1021/acs.langmuir.3c02043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
We present a comprehensive thermogravimetric analysis (TGA) of polyethylenimine (PEI)-impregnated resorcinol-formaldehyde (RF) aerogels. While numerous studies focus on PEI-impregnated SBA, RF materials have been less examined, despite their interest and specificities. As most articles on PEI-impregnated porous materials follow typical experimental methods defined for SBA, particularities of RF-PEI materials could remain unheeded. The design of nonisothermal TGA protocols, completed with nitrogen isotherms, based on the systematic filling of the matrix delivers a fundamental understanding of the relationship between the structure and function. This study demonstrates (i) the competition between the matrix and PEI for CO2-physisorption (φ) and CO2-chemisorption (χ), (ii) the hysteresis ([Formula: see text]) of CO2 capture at low temperature attributed to the kinetic (K) hindrance of CO2 diffusion (D) through PEI film/plugs limiting the chemisorption, and (iii) the thermodynamic (θ) equilibrium limiting the capture at high temperature. At variance with SBA-PEI materials, the first layers of PEI in RF are readily available for CO2 capture given that this matrix does not covalently bind PEI as SBA. A facile method allows the discrimination between physi- and chemisorption, exhibiting how the former decreases with PEI coverage. The CO2 capture hysteresis, while seldom introduced or discussed, underlines that the commonly accepted operating temperature of the "maximum capture" is based on an incomplete experiment. Through isotherm adsorption analysis, we correlate the evolution of this maximum to the morphological distribution of PEI. This contribution highlights the specificities of RF-PEI and the advantages of our TGA protocol in understanding the structure/function relationship of this kind of material by avoiding the typical direct applications of SBA-specific protocols. The method is straightforward, does not need large-scale facilities, and is applicable to other materials. Its easiness and rapidness are suited to high-volume studies, befitting for the comprehensive evaluation of interacting factors such as the matrix's nature, pore size, and PEI weight.
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Affiliation(s)
- Alejandra A Martinez
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Centro Atómico Bariloche (CNEA), S. C. de Bariloche, Río Negro R8402AGP, Argentina
- Instituto de Nanociencia y Nanotecnología, S. C. de Bariloche, Río Negro R8402AGP, Argentina
| | - Pierre P Arneodo Larochette
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Centro Atómico Bariloche (CNEA), S. C. de Bariloche, Río Negro R8402AGP, Argentina
- Instituto Balseiro, Universidad Nacional de Cuyo, S. C. de Bariloche, Río Negro R8402AGP, Argentina
| | - Fabiana C Gennari
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Centro Atómico Bariloche (CNEA), S. C. de Bariloche, Río Negro R8402AGP, Argentina
- Instituto Balseiro, Universidad Nacional de Cuyo, S. C. de Bariloche, Río Negro R8402AGP, Argentina
| | - Aurelien Gasnier
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Centro Atómico Bariloche (CNEA), S. C. de Bariloche, Río Negro R8402AGP, Argentina
- Instituto de Nanociencia y Nanotecnología, S. C. de Bariloche, Río Negro R8402AGP, Argentina
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Kumari N, Samdarshi SK, Verma R, Gaurav K, Bhattacharyya AS, Mohanty K, Deshpande U. Superior functionality of niobium pentoxide nano-rod/tripod photocatalyst synthesized using polyethyleneimine as a soft template for the abatement of methylene blue under UV and visible irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:122458-122469. [PMID: 37973783 DOI: 10.1007/s11356-023-31001-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 11/06/2023] [Indexed: 11/19/2023]
Abstract
Polyethyleneimine (PEI) capping agent-cum-template-mediated synthesis of niobium oxide nanoparticles is reported to explore its impact on the resultant morphology, porosity, crystallinity, phase complexation, and thus on the photocatalytic activity. The resultant niobium oxides calcined at 800°C and 1000°C crystallized into highly ordered nano-rod/tripod nanostructure with inter-rod angle <120° having orthorhombic phase and heavily agglomerated rod-like nanostructures having monoclinic crystal phase, respectively. Contrary to the expectations, the nano-rod/tripods showed superior photocatalytic degradation kinetics and high adsorption of methylene blue dye in the hydrocolloid than formerly reported monoclinic nanoparticles. The best adsorption capability and photocatalytic activity are observed for the sample calcined at 800°C, resulting in a combined degradation efficiency of 98.8% of methylene blue dye. The adsorption characteristics, stability of the hydrocolloid system, the existence of oxygen vacancies, and the distinct morphology of the photocatalytic nano-rod/tripods are mainly responsible for this behavior. The process and the performance of unique nanostructure over others presents a superior alternative.
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Affiliation(s)
- Neha Kumari
- Centre of Excellence in Green and Efficient Energy Technology, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
- Department of Energy Engineering, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
| | - Sanjoy Kumar Samdarshi
- Centre of Excellence in Green and Efficient Energy Technology, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India.
- Department of Energy Engineering, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India.
| | - Ranjana Verma
- Department of Physics, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Kumar Gaurav
- Centre of Excellence in Green and Efficient Energy Technology, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
- Department of Energy Engineering, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
| | - Arnab S Bhattacharyya
- Department of Energy Engineering, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
- Department of Nanotechnology, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
| | - Kaustubha Mohanty
- Department of Chemical Engineering, Indian Institute of Technology, Guwahati, Assam, 781039, India
| | - Uday Deshpande
- University Grant Commission Department of Atomic Energy, Consortium for Scientific Research (UGC-DAE CSR), Indore, Madhya Pradesh, 452001, India
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Surfactant-induced fluorescence enhancement of a quinoline-coumarin derivative in aqueous solutions and dropcast films. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Sharma S, Sharma KP. Light-responsive self-assembled microstructures of branched polyethyleneimine at low pH. Chem Commun (Camb) 2022; 58:13779-13782. [PMID: 36437788 DOI: 10.1039/d2cc04996a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Soft materials comprising polyethyleneimine (PEI), which integrate low pH-stimulated higher-order assemblies (fibres and sheets) with light responsiveness, have been shown. Excitation wavelength light-driven interactions enable the formation of bead-necklace-type structures in fibres or volume collapse of sheets. This work can have significant implications for transfection or encapsulation through PEI-based complexes.
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Affiliation(s)
- Shivalika Sharma
- Soft Materials Research Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-400076, India.
| | - Kamendra P Sharma
- Soft Materials Research Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-400076, India.
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The pH as a tool to tailor the performance of symmetric and asymmetric layer-by-layer nanofiltration membranes. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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From Polyethyleneimine Hydrogels to Pickering-like Smart “On/Off” Emulgels Switched by pH and Temperature. J Colloid Interface Sci 2022; 628:807-819. [DOI: 10.1016/j.jcis.2022.07.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/27/2022] [Accepted: 07/28/2022] [Indexed: 11/13/2022]
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Wu M, Yang J, Chen S, Lu P, Wang R. TOCNC-g-PEI nanoparticle encapsulated oregano essential oil for enhancing the antimicrobial activity of cellulose nanofibril packaging films. Carbohydr Polym 2021; 274:118654. [PMID: 34702473 DOI: 10.1016/j.carbpol.2021.118654] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/05/2021] [Accepted: 09/06/2021] [Indexed: 11/17/2022]
Abstract
A nanocellulose-based film with excellent antimicrobial and antioxidant activity was developed by adding Pickering emulsion which was stabilized by functionalized particles. First, TOCNC-g-PEI nanoparticles were prepared by grafting polyethyleneimine (PEI) onto TEMPO-oxidized cellulose nanocrystals (TOCNCs) and used to stabilize oregano essential oil (OEO) Pickering emulsions. The contact angle of TOCNC-g-PEI nanoparticles was 79.7°, and the minimum inhibitory concentration against L.monocytogenes and E.coli was 0.50 mg/mL. Second, the emulsion droplets were stably dispersed in cellulose nanofibril (CNF) suspensions owing to the depletion stability of CNFs. Finally, the films were dried and emulsion droplets formed oil core/CNF shell microcapsules in active CNF films and completely encapsulated OEO in active CNF films. The inhibition rates of the film against L.monocytogenes and E.coli were 97.28% and 97.23%, respectively. The influence of Pickering emulsion on the active CNF films was discussed. The developed active CNF films have promising application in food preservation and active packaging.
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Affiliation(s)
- Min Wu
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China
| | - Jian Yang
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
| | - Shunli Chen
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
| | - Peng Lu
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China.
| | - Ruifang Wang
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
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