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Villafranca JC, Berton P, Ferguson M, Clausen R, Arancibia-Miranda N, Martinis EM. Aluminosilicates-based nanosorbents for heavy metal removal - A review. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134552. [PMID: 38823105 DOI: 10.1016/j.jhazmat.2024.134552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/17/2024] [Accepted: 05/03/2024] [Indexed: 06/03/2024]
Abstract
Contamination of water bodies with heavy metals poses a significant threat to human health and the environment, requiring the development of effective treatment techniques. In this context, aluminosilicates emerge as promising sorbents due to their cost-effectiveness and natural abundance. This review provides a clear, in-depth, and comprehensive description of the structure, properties, and characteristics of aluminosilicates, supporting their application as adsorbents and highlighting their diversity and adaptability to different matrices and analytes. Furthermore, the functionalization of these materials is thoroughly addressed, detailing the techniques currently used, exposing the advantages and disadvantages of each approach, and establishing comparisons and evaluations of the performances of various functionalized aluminosilicates in the extraction of heavy metals in aqueous matrices. This work aims not only to comprehensively review numerous studies from recent years but also to identify trends in the study of such materials and inspire future research and applications in the field of contaminant removal using aluminosilicates.
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Affiliation(s)
- Juan C Villafranca
- Facultad de Ingeniería, Universidad Nacional de Cuyo - Centro Universitario, Mendoza, M5500 Mendoza, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Paula Berton
- Chemical and Petroleum Engineering Department, University of Calgary, Calgary, AB, Canada
| | - Michael Ferguson
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Ruth Clausen
- Facultad de Ingeniería, Universidad Nacional de Cuyo - Centro Universitario, Mendoza, M5500 Mendoza, Argentina
| | - Nicolás Arancibia-Miranda
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Santiago, Chile; Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Estefanía M Martinis
- Facultad de Ingeniería, Universidad Nacional de Cuyo - Centro Universitario, Mendoza, M5500 Mendoza, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina; Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina.
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2
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Jeon H, Na C, Kwac LK, Kim HG, Chang JH. Effects of various types of organo-mica on the physical properties of polyimide nanocomposites. Sci Rep 2024; 14:655. [PMID: 38182758 PMCID: PMC10770344 DOI: 10.1038/s41598-023-51064-6] [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: 08/19/2023] [Accepted: 12/29/2023] [Indexed: 01/07/2024] Open
Abstract
Poly(amic acid) (PAA) was synthesized using dianhydride 4,4'-oxydiphthalic anhydride and diamine 3,3'-dihydroxybenzidine, and polyimide (PI) hybrid films were synthesized by dispersing organo-mica in PAA through a solution intercalation method. Hexadimethrine-mica (HM-Mica), 1,2-dimethylhexadecylimidazolium-mica (MI-Mica), and didodecyldiphenylammonium-mica (DP-Mica), which were obtained via the organic modification of pristine mica, were used as the organo-micas for the PI hybrid films. The organo-mica content was varied from 0.5 to 3.0 wt% with respect to the PI matrix. The thermomechanical properties, morphology, and optical transparency of the resultant PI hybrid films were measured and compared. Dispersion of even small amounts of organo-mica effectively improved the physical properties of the PI hybrids, and maximum enhancements in physical properties were observed at a specific critical content. Electron microscopy of the hybrid films revealed that the organo-mica uniformly dispersed throughout the polymer matrix at the nanoscale level when added at low contents but aggregated in the matrix when added at levels above the critical content. Structural changes in the organo-mica closely influenced the changes in the physical properties of the hybrid films. All PI hybrid films with various organo-mica contents showed similar optical properties, but that prepared with MI-Mica demonstrated the best thermomechanical properties. All synthesized PI hybrid films were transparent regardless of the type and content of organo-mica used.
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Affiliation(s)
- Hara Jeon
- Graduate School of Carbon Convergence Engineering, Jeonju University, Jeonju, 55069, Korea
| | - Changyub Na
- Graduate School of Carbon Convergence Engineering, Jeonju University, Jeonju, 55069, Korea
| | - Lee Ku Kwac
- Graduate School of Carbon Convergence Engineering, Jeonju University, Jeonju, 55069, Korea
- Institute of Carbon Technology, Jeonju University, Jeonju, 55069, Korea
| | - Hong Gun Kim
- Graduate School of Carbon Convergence Engineering, Jeonju University, Jeonju, 55069, Korea
- Institute of Carbon Technology, Jeonju University, Jeonju, 55069, Korea
| | - Jin-Hae Chang
- Institute of Carbon Technology, Jeonju University, Jeonju, 55069, Korea.
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3
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Bikiaris ND, Koumentakou I, Samiotaki C, Meimaroglou D, Varytimidou D, Karatza A, Kalantzis Z, Roussou M, Bikiaris RD, Papageorgiou GZ. Recent Advances in the Investigation of Poly(lactic acid) (PLA) Nanocomposites: Incorporation of Various Nanofillers and their Properties and Applications. Polymers (Basel) 2023; 15:polym15051196. [PMID: 36904437 PMCID: PMC10007491 DOI: 10.3390/polym15051196] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/08/2023] Open
Abstract
Poly(lactic acid) (PLA) is considered the most promising biobased substitute for fossil-derived polymers due to its compostability, biocompatibility, renewability, and good thermomechanical properties. However, PLA suffers from several shortcomings, such as low heat distortion temperature, thermal resistance, and rate of crystallization, whereas some other specific properties, i.e., flame retardancy, anti-UV, antibacterial or barrier properties, antistatic to conductive electrical characteristics, etc., are required by different end-use sectors. The addition of different nanofillers represents an attractive way to develop and enhance the properties of neat PLA. Numerous nanofillers with different architectures and properties have been investigated, with satisfactory achievements, in the design of PLA nanocomposites. This review paper overviews the current advances in the synthetic routes of PLA nanocomposites, the imparted properties of each nano-additive, as well as the numerous applications of PLA nanocomposites in various industrial fields.
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Affiliation(s)
- Nikolaos D. Bikiaris
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Ioanna Koumentakou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Christina Samiotaki
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Despoina Meimaroglou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Despoina Varytimidou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Anastasia Karatza
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Zisimos Kalantzis
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Magdalini Roussou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Rizos D. Bikiaris
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - George Z. Papageorgiou
- Department of Chemistry, University of Ioannina, P.O. Box 1186, GR-45110 Ioannina, Greece
- Correspondence:
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4
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Champa-Bujaico E, García-Díaz P, Díez-Pascual AM. Machine Learning for Property Prediction and Optimization of Polymeric Nanocomposites: A State-of-the-Art. Int J Mol Sci 2022; 23:ijms231810712. [PMID: 36142623 PMCID: PMC9505448 DOI: 10.3390/ijms231810712] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/08/2022] [Accepted: 09/10/2022] [Indexed: 11/16/2022] Open
Abstract
Recently, the field of polymer nanocomposites has been an area of high scientific and industrial attention due to noteworthy improvements attained in these materials, arising from the synergetic combination of properties of a polymeric matrix and an organic or inorganic nanomaterial. The enhanced performance of those materials typically involves superior mechanical strength, toughness and stiffness, electrical and thermal conductivity, better flame retardancy and a higher barrier to moisture and gases. Nanocomposites can also display unique design possibilities, which provide exceptional advantages in developing multifunctional materials with desired properties for specific applications. On the other hand, machine learning (ML) has been recognized as a powerful predictive tool for data-driven multi-physical modelling, leading to unprecedented insights and an exploration of the system’s properties beyond the capability of traditional computational and experimental analyses. This article aims to provide a brief overview of the most important findings related to the application of ML for the rational design of polymeric nanocomposites. Prediction, optimization, feature identification and uncertainty quantification are presented along with different ML algorithms used in the field of polymeric nanocomposites for property prediction, and selected examples are discussed. Finally, conclusions and future perspectives are highlighted.
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Affiliation(s)
- Elizabeth Champa-Bujaico
- Universidad de Alcalá, Departamento de Teoría de la Señal y Comunicaciones, Ctra. Madrid-Barcelona Km. 33.6, 28805 Alcalá de Henares, Madrid, Spain
| | - Pilar García-Díaz
- Universidad de Alcalá, Departamento de Teoría de la Señal y Comunicaciones, Ctra. Madrid-Barcelona Km. 33.6, 28805 Alcalá de Henares, Madrid, Spain
| | - Ana M. Díez-Pascual
- Universidad de Alcalá, Facultad de Ciencias, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona Km. 33.6, 28805 Alcalá de Henares, Madrid, Spain
- Correspondence:
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5
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Komarov PV, Malyshev MD, Khalatur PG, Khokhlov AR. Self-Assembling Polymer Nanocomposites Based on Symmetric Diblock Copolymers: Mesoscopic Modeling. DOKLADY PHYSICAL CHEMISTRY 2022. [DOI: 10.1134/s0012501622600152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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6
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Malyshev MD, Guseva DV, Komarov PV. Effect of Surface Modification of Nanoparticles on the Mechanical Properties of Highly Crosslinked Epoxy Nanocomposites: Mesoscopic Simulation. DOKLADY PHYSICAL CHEMISTRY 2022. [DOI: 10.1134/s0012501621090025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Potential of oxalic acid leached natural palygorskite-rich clay as multidimensional nanofiller to improve polypropylene. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2021.10.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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8
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Cao S, Liu C, Zhou L, Zhang H, Zhao Y, Liu Z. Bioapplication of cyclodextrin-containing montmorillonite. J Mater Chem B 2021; 9:9241-9261. [PMID: 34698331 DOI: 10.1039/d1tb01719e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Recent progresses in the integration of CDs and montmorillonite, as well as applications of CD-containing montmorillonite hybrid host systems are summarized in this review. Several efficient synthesis strategies, such as ion exchange, metal coordination, supramolecular strategies, polymerizations and organic synthesis methods, have been discussed during the preparation of CDs/montmorillonite hybrid composites. In particular, diverse instrumental techniques were highly recommended for characterizing the as-obtained hybrid systems, including their chemical composition and structures, crystallinity, surface/self-assembled morphologies, as well as other particular physiochemical properties, providing a direct guide for promoting the desired structures and exploring various applications. It should be noted that the introduction of functional groups, as well as the integration of CDs and montmorillonite granted the thus obtained CD-containing montmorillonite hybrid host systems a lot of unique features, providing great opportunities for expanding the practical applications to a series of biological and environmental areas, such as biosensors, sorption and decontamination of bio/environmental hazardous materials, biostudies about aqueous dispersity, stability and biocompatibility, drug loading and target delivery, controlled and sustained drug release, as well as antibacterial.
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Affiliation(s)
- Shuai Cao
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Chang Liu
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Le Zhou
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Huacheng Zhang
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Yuxin Zhao
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Zhaona Liu
- Medical School, Xi'an Peihua University, Xi'an 710125, Shaanxi, China.
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9
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Malyshev MD, Guseva DV, Vasilevskaya VV, Komarov PV. Effect of Nanoparticles Surface Bonding and Aspect Ratio on Mechanical Properties of Highly Cross-Linked Epoxy Nanocomposites: Mesoscopic Simulations. MATERIALS (BASEL, SWITZERLAND) 2021; 14:6637. [PMID: 34772168 PMCID: PMC8587117 DOI: 10.3390/ma14216637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 10/22/2021] [Accepted: 11/02/2021] [Indexed: 11/16/2022]
Abstract
The paper aims to study the mechanical properties of epoxy resin filled with clay nanoparticles (NPs), depending on their shapes and content on the surface of a modifying agent capable of forming covalent bonds with a polymer. The cylindrical clay nanoparticles with equal volume and different aspects ratios (disks, barrel, and stick) are addressed. The NPs' bonding ratio with the polymer (RGC) is determined by the fraction of reactive groups and conversion time and varies from RGC = 0 (non-bonded nanoparticles) to RGC = 0.65 (more than half of the surface groups are linked with the polymer matrix). The performed simulations show the so-called load-bearing chains (LBCs) of chemically cross-linked monomers and modified nanoparticles to determine the mechanical properties of the simulated composites. The introduction of nanoparticles leads to the breaking of such chains, and the chemical cross-linking of NPs with the polymer matrix restores the LBCs and strengthens the composite. At small values of RGC, the largest value of the elastic modulus is found for systems filled with nanoparticles having the smallest surface area, and at high values of RGC, on the contrary, the systems containing disk-shaped particles with the largest surface area have a larger elastic modulus than the others. All calculations are performed within the framework of a mesoscopic model based on accurate mapping of the atomistic structures of the polymer matrix and nanoparticles into coarse-grained representations, which, if necessary, allow reverse data mapping and quantitative assessment of the state of the filled epoxy resin. On the other hand, the obtained data can be used to design the functional materials with specified mechanical properties based on other practically significant polymer matrices and nanofillers.
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Affiliation(s)
- Maxim D. Malyshev
- Departments of Physical Chemistry and General Physics, Tver State University, Zhelyabova 33, 170100 Tver, Russia;
| | - Daria V. Guseva
- A.N. Nesmeyanov Institute of Organoelement Compounds RAS, Vavilova St. 28, 119991 Moscow, Russia;
| | | | - Pavel V. Komarov
- Departments of Physical Chemistry and General Physics, Tver State University, Zhelyabova 33, 170100 Tver, Russia;
- A.N. Nesmeyanov Institute of Organoelement Compounds RAS, Vavilova St. 28, 119991 Moscow, Russia;
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10
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Kourtidou D, Grigora ME, Tsongas K, Terzopoulou Z, Tzetzis D, Bikiaris DN, Chrissafis K. Effect of ball milling on the mechanical properties and crystallization of graphene nanoplatelets reinforced short chain
branched‐polyethylene. J Appl Polym Sci 2021. [DOI: 10.1002/app.50874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Dimitra Kourtidou
- School of Physics, Advanced Material and Devices Laboratory Aristotle University of Thessaloniki Thessaloniki Greece
| | - Maria Eirini Grigora
- Manufacturing and Materials Characterization Laboratory International Hellenic University, School of Science and Technology Thermi Greece
| | - Konstantinos Tsongas
- Manufacturing and Materials Characterization Laboratory International Hellenic University, School of Science and Technology Thermi Greece
| | - Zoe Terzopoulou
- Department of Chemistry, Laboratory of Polymer Chemistry and Technology Aristotle University of Thessaloniki Thessaloniki Greece
| | - Dimitrios Tzetzis
- Manufacturing and Materials Characterization Laboratory International Hellenic University, School of Science and Technology Thermi Greece
| | - Dimitrios N. Bikiaris
- Department of Chemistry, Laboratory of Polymer Chemistry and Technology Aristotle University of Thessaloniki Thessaloniki Greece
| | - Konstantinos Chrissafis
- School of Physics, Advanced Material and Devices Laboratory Aristotle University of Thessaloniki Thessaloniki Greece
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11
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Yu C, Hu X, Lu S, Ke Y, Luo J. Preparation of Triple-Functionalized Montmorillonite Layers Promoting Thermal Stability of Polystyrene. NANOMATERIALS 2021; 11:nano11092170. [PMID: 34578483 PMCID: PMC8469512 DOI: 10.3390/nano11092170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/20/2021] [Accepted: 08/24/2021] [Indexed: 11/16/2022]
Abstract
The objective of this study was to investigate the effect of three different treatments on the morphology, microstructure, and the thermal characteristics of a montmorillonite (Mt) sample, by using hydrochloric acid (HCl), tributyl tetradecyl phosphonium chloride (TTPC) surfactant, and γ-methacryloxypropyltrimethoxysilane (γ-MPS). The resultant nanofillers were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), nitrogen adsorption-desorption analysis, X-ray fluorescence spectrometry (XRF), and thermogravimetric analysis (TGA). The results showed that the amount of chemical grafting of the γ-MPS was increased after the acid treatment, whereas the amount of intercalation of the TTPC surfactant was decreased. The preintercalation of TTPC or silylation of γ-MPS, for the Mt sample, had a certain hindrance effect on its subsequent silylation or intercalation treatments. Furthermore, the effect of four different nanofillers on the thermal stability properties of the polystyrene (PS) matrix were also investigated. The results showed an increase in thermal stability for the triple-functionalized Mt, compared with the double-functionalized samples. The onset decomposition temperatures and the maximum mass loss temperatures of the PS nanocomposites were increased by 27 °C and 32 °C, respectively, by the incorporation of triple-modified Mt, as a result of the good exfoliation and dispersion of the nanolayers, more favorable polymer-nanofiller interaction, as well as the formation of a more remarkable tortuous pathway in the continuous matrix.
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Affiliation(s)
- Chengcheng Yu
- State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
- CNPC Nanochemistry Key Laboratory, College of Science, China University of Petroleum, Beijing 102249, China; (X.H.); (S.L.); (Y.K.)
- Correspondence:
| | - Xu Hu
- CNPC Nanochemistry Key Laboratory, College of Science, China University of Petroleum, Beijing 102249, China; (X.H.); (S.L.); (Y.K.)
| | - Shichao Lu
- CNPC Nanochemistry Key Laboratory, College of Science, China University of Petroleum, Beijing 102249, China; (X.H.); (S.L.); (Y.K.)
| | - Yangchuan Ke
- CNPC Nanochemistry Key Laboratory, College of Science, China University of Petroleum, Beijing 102249, China; (X.H.); (S.L.); (Y.K.)
| | - Jianbin Luo
- State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
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12
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Kwac LK, Kim HG, Chang JH. Comparison of Properties of Colorless and Transparent Polyimide Nanocomposites Containing Different Diamine Monomers. ACS OMEGA 2021; 6:19006-19016. [PMID: 34337239 PMCID: PMC8320146 DOI: 10.1021/acsomega.1c02285] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/05/2021] [Indexed: 06/03/2023]
Abstract
To improve the optical properties of polyimide (PI) films, we prepared two series of colorless transparent PIs from the dianhydride 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and a diamine, either 2,2-bis(3-aminophenyl)hexafluoropropane (FDN) or 2,2-bis(3-amino-4-hydroxy-phenyl)hexafluoropropane (FDN-OH). Next, colorless PI (CPI) composite films were prepared by dispersing 0-1.00 wt % of organically modified clay (Cloisite 30B) in the intermediate poly(amic acid) (PAA) solution via solution intercalation, followed by imidization. The resultant CPI films had excellent optical transparency, which was achieved by reducing the charge-transfer effects by using a highly electronegative trifluoromethyl group and a kinked monomer structure. The thermal and mechanical properties, morphologies, and optical transparencies of the two as-synthesized CPI hybrid film series were investigated and compared. Electron microscopy observation of the two hybrid series revealed that the clay was well-dispersed with a nanoscale dispersion at all clay contents. However, agglomeration occurred at nanoclay loadings of 1.0 wt %. In addition, the effect of the presence of hydroxyl groups in the PI chain on various physical properties of the two CPI hybrids was also compared.
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Affiliation(s)
- Lee Ku Kwac
- Graduate
School of Carbon Convergence Engineering, Jeonju University, Jeonju 55069, Korea
- Institute
of Carbon Technology, Jeonju University, Jeonju 55069, Korea
| | - Hong Gun Kim
- Graduate
School of Carbon Convergence Engineering, Jeonju University, Jeonju 55069, Korea
- Institute
of Carbon Technology, Jeonju University, Jeonju 55069, Korea
| | - Jin-Hae Chang
- Institute
of Carbon Technology, Jeonju University, Jeonju 55069, Korea
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13
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Xu D, Wang S, Berglund LA, Zhou Q. Surface Charges Control the Structure and Properties of Layered Nanocomposite of Cellulose Nanofibrils and Clay Platelets. ACS APPLIED MATERIALS & INTERFACES 2021; 13:4463-4472. [PMID: 33428385 PMCID: PMC7880528 DOI: 10.1021/acsami.0c18594] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
The interfacial bonding and structure at the nanoscale in the polymer-clay nanocomposites are essential for obtaining desirable material and structure properties. Layered nanocomposite films of cellulose nanofibrils (CNFs)/montmorillonite (MTM) were prepared from the water suspensions of either CNFs bearing quaternary ammonium cations (Q-CNF) or CNFs bearing carboxylate groups (TO-CNF) with MTM nanoplatelets carrying net surface negative charges by using vacuum filtration followed by compressive drying. The effect of the ionic interaction between cationic or anionic charged CNFs and MTM nanoplatelets on the structure, mechanical properties, and flame retardant performance of the TO-CNF/MTM and Q-CNF/MTM nanocomposite films were studied and compared. The MTM nanoplatelets were well dispersed in the network of TO-CNFs in the form of nanoscale tactoids with the MTM content in the range of 5-70 wt %, while an intercalated structure was observed in the Q-CNF/MTM nanocomposites. The resulting TO-CNF/MTM nanocomposite films had a better flame retardant performance as compared to the Q-CNF/MTM films with the same MTM content. In addition, the effective modulus of MTM for the TO-CNF/MTM nanocomposites was as high as 129.9 GPa, 3.5 times higher than that for Q-CNF/MTM (37.1 GPa). On the other hand, the Q-CNF/MTM nanocomposites showed a synergistic enhancement in the modulus and tensile strength together with strain-to-failure and demonstrated a much better toughness as compared to the TO-CNF/MTM nanocomposites.
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Affiliation(s)
- Dingfeng Xu
- Division
of Glycoscience, Department of Chemistry, School of Engineering Sciences
in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, AlbaNova University Centre, Stockholm SE-106 91, Sweden
| | - Shennan Wang
- Division
of Glycoscience, Department of Chemistry, School of Engineering Sciences
in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, AlbaNova University Centre, Stockholm SE-106 91, Sweden
| | - Lars A. Berglund
- Wallenberg
Wood Science Center, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
| | - Qi Zhou
- Division
of Glycoscience, Department of Chemistry, School of Engineering Sciences
in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, AlbaNova University Centre, Stockholm SE-106 91, Sweden
- Wallenberg
Wood Science Center, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
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14
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Super ductility in HDPE/EVA blends triggered by synthetic amorphous nanotalc. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-020-02389-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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15
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Banerjee R, Ray SS. An overview of the recent advances in polylactide‐based sustainable nanocomposites. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25623] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ritima Banerjee
- Department of Chemical Engineering Calcutta Institute of Technology Howrah India
| | - Suprakas Sinha Ray
- Centre for Nanostructures and Advanced Materials, DSI‐CSIR Nanotechnology Innovation Centre Council for Scientific and Industrial Research Pretoria South Africa
- Department of Chemical Sciences University of Johannesburg Johannesburg South Africa
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16
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Boccalon E, Gorrasi G, Nocchetti M. Layered double hydroxides are still out in the bloom: Syntheses, applications and advantages of three-dimensional flower-like structures. Adv Colloid Interface Sci 2020; 285:102284. [PMID: 33164779 DOI: 10.1016/j.cis.2020.102284] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/09/2020] [Accepted: 10/09/2020] [Indexed: 01/08/2023]
Abstract
Layered double hydroxides (LDHs) have received great attention for years in numerous fields. Controlled and flexible layer composition, as well as the vast assortment of possible anionic guests, and easy adaptability for multipurpose applications, have been some of the many reasons behind their extraordinary success. However, versatility does not only involve the composition or the dimensions of the crystals but also their morphology. Aside from conventional hexagonal, flat structures, three-dimensional assemblies have been reported with architectures closely resembling those of flowers. The possibility of interconnecting the LDH nanosheets in rosette-like geometries has arisen the interest in finding new ways to control, modulate, and guide the particle growth obtaining hierarchical structures to be adapted to specific targets. This review is focused on describing the different strategies implemented to build flower-like assemblies, and on investigating their applications, looking for specific advantages of the use of a three-dimensional architecture over a bi-dimensional one.
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Affiliation(s)
- Elisa Boccalon
- Department of Industrial Engineering, Via Giovanni Paolo II 132, University of Salerno, 84084 Salerno, Italy
| | - Giuliana Gorrasi
- Department of Industrial Engineering, Via Giovanni Paolo II 132, University of Salerno, 84084 Salerno, Italy.
| | - Morena Nocchetti
- Department of Pharmaceutical Sciences, Via del Liceo 1, University of Perugia, 06123 Perugia, Italy
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17
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Teng X, Li F, Lu C. Visualization of materials using the confocal laser scanning microscopy technique. Chem Soc Rev 2020; 49:2408-2425. [PMID: 32134417 DOI: 10.1039/c8cs00061a] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The development of materials science always benefits from advanced characterizations. Currently, imaging techniques are of great technological importance in both fundamental and applied research on materials. In comparison to conventional visualization methods, confocal laser scanning microscopy (CLSM) is non-invasive, with macroscale and high-contrast scanning, a simple and fast sample preparation procedure as well as easy operation. In addition, CLSM allows rapid acquisition of longitudinal and cross-sectional images at any position in a material. Therefore, the CLSM-based visualization technique could provide direct and model-independent insight into material characterizations. This review summarizes the recent applications of CLSM in materials science. The current CLSM approaches for the visualization of surface structures, internal structures, spatial structures and reaction processes are discussed in detail. Finally, we provide our thoughts and predictions on the future development of CLSM in materials science. The purpose of this review is to guide researchers to build a suitable CLSM approach for material characterizations, and to open viable opportunities and inspirations for the development of new strategies aiming at the preparation of advanced materials. We hope that this review will be useful for a wide range of research communities of materials science, chemistry, and engineering.
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Affiliation(s)
- Xu Teng
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering (BAICAS), State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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18
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Shin HI, Chang JH. Transparent Polyimide/Organoclay Nanocomposite Films Containing Different Diamine Monomers. Polymers (Basel) 2020; 12:polym12010135. [PMID: 31935847 PMCID: PMC7022304 DOI: 10.3390/polym12010135] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/24/2019] [Accepted: 01/01/2020] [Indexed: 12/04/2022] Open
Abstract
Poly (amic acid) s (PAAs) were synthesized using 4,4′-(hexafluoroisopropyl-idene) diphthalic anhydride (6FDA) and two types of diamines—bis(3-aminophenyl) sulfone (BAS) and bis(3-amino-4-hydroxyphenyl) sulfone (BAS-OH). Two series of transparent polyimide (PI) hybrid films were synthesized by solution intercalation polymerization and thermal imidization using various concentrations (from 0 to 1 wt%) of organically modified clay Cloisite 30B in PAA solution. The thermo-mechanical properties, morphology, and optical transparency of the hybrid films were observed. The transmission electronic microscopy (TEM) results showed that some of the clays were agglomerated, but most of them showed dispersed nanoscale clay. The effects of -OH groups on the properties of the two PI hybrids synthesized using BAS and BAS-OH monomers were compared. The BAS PI hybrids were superior to the BAS-OH PI hybrids in terms of thermal stability and optical transparency, but the BAS-OH PI hybrids exhibited higher glass transition temperatures (Tg) and mechanical properties. Analysis of the thermal properties and tensile strength showed that the highest critical concentration of organoclay was 0.50 wt%.
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19
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Compatibilization of clays and hydrophobic polymers: the case of montmorillonite and polyetheretherketone. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-03036-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Chaparro TDC, Silva RD, Monteiro IS, Barros-Timmons A, Giudici R, Martins Dos Santos A, Bourgeat-Lami E. Interaction of Cationic, Anionic, and Nonionic Macroraft Homo- and Copolymers with Laponite Clay. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11512-11523. [PMID: 31404489 DOI: 10.1021/acs.langmuir.9b01987] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The functionalization of Laponite RD platelets with different cationic, anionic, and nonionic homo- and copolymers synthesized by reversible addition-fragmentation chain transfer (RAFT) has been investigated. The effective interaction of the macromolecular RAFT agents (macroRAFTs) with the inorganic particles is known to be of crucial importance for the successful coating of minerals with polymers via RAFT-mediated emulsion polymerization to produce polymer-encapsulated inorganic particles. The macroRAFT agents synthesized in the present work contain carefully selected reinitiating R groups, which bear either ionizable tertiary amine or quaternary ammonium moieties (from 2-(dimethylamino)ethyl methacrylate, DMAEMA), negatively charged acrylic acid (AA) repeat units, or neutral polyethylene glycol (PEG) side chains, and are capable of interacting with Laponite via different adsorption mechanisms. The equilibrium adsorption of these RAFT (co)polymers was investigated by the plotting of adsorption isotherms, and either L-type or H-type curves were obtained. The hydrophobicity of the macroRAFT was shown to promote adsorption, as did the pending configuration of the PEG block. Charge repulsion between AA and the negatively charged surface of Laponite at pH 7.5, on the other hand, was prejudicial for adsorption, while the strong electrostatic interaction between the cationic DMAEMA molecules and the Laponite surface led to high-affinity-type curves.
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Affiliation(s)
- Thaíssa de Camargo Chaparro
- 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
- Engineering School of Lorena , University of São Paulo , 12.602-810 Lorena , SP , Brazil
| | - Rodrigo Duarte Silva
- Engineering School of Lorena , University of São Paulo , 12.602-810 Lorena , SP , Brazil
| | | | - A Barros-Timmons
- Department of Chemistry, CICECO , University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro , Portugal
| | - Reinaldo Giudici
- Department of Chemical Engineering , Polytechnic School of the University of São Paulo , 05508-010 São Paulo , SP Brazil
| | | | - 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
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21
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Silva RD, Chaparro TDC, Monteiro IS, Dugas PY, D’Agosto F, Lansalot M, Martins dos Santos A, ’Bourgeat-Lami E. Tailoring the Morphology of Polymer/Montmorillonite Hybrid Latexes by Surfactant-Free Emulsion Polymerization Mediated by Amphipathic MacroRAFT Agents. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00741] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Rodrigo Duarte Silva
- Engineering School of Lorena—University of Sao Paulo, Laboratory of Polymers, 12602-810 Lorena, SP, Brazil
| | - Thaíssa de Camargo Chaparro
- 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
- Engineering School of Lorena—University of Sao Paulo, Laboratory of Polymers, 12602-810 Lorena, SP, Brazil
| | - Igor Stefanichen Monteiro
- Engineering School of Lorena—University of Sao Paulo, Laboratory of Polymers, 12602-810 Lorena, SP, Brazil
| | - Pierre-Yves Dugas
- 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
| | - Franck D’Agosto
- 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
| | - Muriel Lansalot
- 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
| | - Amilton Martins dos Santos
- Engineering School of Lorena—University of Sao Paulo, Laboratory of Polymers, 12602-810 Lorena, SP, Brazil
| | - 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
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22
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Suter JL, Coveney PV. Chemically Specific Multiscale Modeling of the Shear-Induced Exfoliation of Clay-Polymer Nanocomposites. ACS OMEGA 2018; 3:6439-6445. [PMID: 31458824 PMCID: PMC6644647 DOI: 10.1021/acsomega.8b00542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 06/04/2018] [Indexed: 06/10/2023]
Abstract
We recently showed, using chemically specific modeling and simulation, how the process of intercalation of polymers within clay sheets occurs, transforming the large-scale materials properties by a specific set of spatial and temporal processes that can lead to exfoliation. Here, we use the same hierarchal multiscale modeling scheme to understand the processes that occur during the shear-induced processing of clay-polymer nanocomposites. For both hydrophobic polymers (polyethylene) and hydrophilic polymers (poly(ethylene glycol)), we used free-energy methods to identify the lowest-free-energy separation of the clay sheets; the polymer molecules spontaneously intercalate into the clay interlayer from the surrounding polymer melt. We apply shear forces to investigate exfoliation and find that while exfoliation is promoted by shearing, it is the surfactant molecules that play the dominant role in resisting it.
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Affiliation(s)
- James L. Suter
- Centre
for Computational Science and Centre for Computational Science, University College London, 20 Gordon
Street, London WC1H 0AJ, United Kingdom
| | - Peter V. Coveney
- Centre
for Computational Science and Centre for Computational Science, University College London, 20 Gordon
Street, London WC1H 0AJ, United Kingdom
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23
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Silva FAR, Sales MJA, Paterno LG, Ghoul M, Chebil L, Maia ER. Molecular dynamics studies of amylose plasticized with Brazilian Cerrado oils: part I. POLIMEROS 2018. [DOI: 10.1590/0104-1428.09917] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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Mousa M, Evans ND, Oreffo RO, Dawson JI. Clay nanoparticles for regenerative medicine and biomaterial design: A review of clay bioactivity. Biomaterials 2018; 159:204-214. [DOI: 10.1016/j.biomaterials.2017.12.024] [Citation(s) in RCA: 143] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 12/21/2017] [Accepted: 12/31/2017] [Indexed: 11/17/2022]
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25
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Loiko OP, Spoelstra AB, van Herk AM, Meuldijk J, Heuts JPA. Design and Preparation of Highly Filled Water-Borne Polymer-Gibbsite Nanocomposites. MACROMOL REACT ENG 2017. [DOI: 10.1002/mren.201700051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Olessya P. Loiko
- Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; PO Box 513 5600 MB Eindhoven The Netherlands
| | - Anne B. Spoelstra
- Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; PO Box 513 5600 MB Eindhoven The Netherlands
| | - Alexander M. van Herk
- Institute of Chemical and Engineering Sciences; 1 Pesek Road Jurong Island 627833 Singapore
| | - Jan Meuldijk
- Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; PO Box 513 5600 MB Eindhoven The Netherlands
| | - Johan P. A. Heuts
- Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; PO Box 513 5600 MB Eindhoven The Netherlands
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26
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Kahraman HT, Yar A, Avcı A, Pehlivan E. Preparation of nanoclay incorporated PAN fibers by electrospinning technique and its application for oil and organic solvent absorption. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1384018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Adem Yar
- Department of Mechanical Engineering, Selcuk University, Konya, Turkey
| | - Ahmet Avcı
- Department of Mechanical Engineering, Selcuk University, Konya, Turkey
| | - Erol Pehlivan
- Department of Chemical Engineering, Selcuk University, Konya, Turkey
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27
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Moyo L, Ray SS, Sebati W, Ojijo V. The influence of filler surface modification on mechanical and material properties of layered double hydroxide-containing polypropylene composites. J Appl Polym Sci 2017. [DOI: 10.1002/app.45024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Lumbidzani Moyo
- DST-CSIR National Centre for Nanostructured Materials; Council for Scientific and Industrial Research; Pretoria 0001 South Africa
| | - Suprakas Sinha Ray
- DST-CSIR National Centre for Nanostructured Materials; Council for Scientific and Industrial Research; Pretoria 0001 South Africa
- Department of Applied Chemistry; University of Johannesburg; Droonfontein 2028 Johannesburg South Africa
| | - Wilhemina Sebati
- DST-CSIR National Centre for Nanostructured Materials; Council for Scientific and Industrial Research; Pretoria 0001 South Africa
| | - Vincent Ojijo
- DST-CSIR National Centre for Nanostructured Materials; Council for Scientific and Industrial Research; Pretoria 0001 South Africa
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28
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Soltani I, Smith SD, Spontak RJ. Effect of polyelectrolyte on the barrier efficacy of layer-by-layer nanoclay coatings. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.12.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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29
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Guan W, Wang S, Lu C, Tang BZ. Fluorescence microscopy as an alternative to electron microscopy for microscale dispersion evaluation of organic-inorganic composites. Nat Commun 2016; 7:11811. [PMID: 27251015 PMCID: PMC4895723 DOI: 10.1038/ncomms11811] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 05/03/2016] [Indexed: 12/19/2022] Open
Abstract
Inorganic dispersion is of great importance for actual implementation of advanced properties of organic-inorganic composites. Currently, electron microscopy is the most conventional approach for observing dispersion of inorganic fillers from ultrathin sections of organic-inorganic composites at the nanoscale by professional technicians. However, direct visualization of macrodispersion of inorganic fillers in organic-inorganic composites using high-contrast fluorescent imaging method is hampered. Here we design and synthesize a unique fluorescent surfactant, which combines the properties of the aggregation-induced emission (AIE) and amphiphilicity, to image macrodispersion of montmorillonite and layered double hydroxide fillers in polymer matrix. The proposed fluorescence imaging provides a number of important advantages over electron microscope imaging, and opens a new avenue in the development of direct three-dimensional observation of inorganic filler macrodispersion in organic-inorganic composites.
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Affiliation(s)
- Weijiang Guan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, PO Box 98, Beijing 100029, China
| | - Si Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, PO Box 98, Beijing 100029, China
| | - Chao Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, PO Box 98, Beijing 100029, China
| | - Ben Zhong Tang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong 999077, China
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30
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Almuhamed S, Bonne M, Khenoussi N, Brendle J, Schacher L, Lebeau B, Adolphe DC. Electrospinning composite nanofibers of polyacrylonitrile/synthetic Na-montmorillonite. J IND ENG CHEM 2016. [DOI: 10.1016/j.jiec.2015.12.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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31
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Gatti T, Vicentini N, Mba M, Menna E. Organic Functionalized Carbon Nanostructures for Functional Polymer-Based Nanocomposites. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501411] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Suter JL, Groen D, Coveney PV. Mechanism of Exfoliation and Prediction of Materials Properties of Clay-Polymer Nanocomposites from Multiscale Modeling. NANO LETTERS 2015; 15:8108-13. [PMID: 26575149 DOI: 10.1021/acs.nanolett.5b03547] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We describe the mechanism that leads to full exfoliation and dispersion of organophilic clays when mixed with molten hydrophilic polymers. This process is of fundamental importance for the production of clay-polymer nanocomposites with enhanced materials properties. The chemically specific nature of our multiscale approach allows us to probe how chemistry, in combination with processing conditions, produces such materials properties at the mesoscale and beyond. In general agreement with experimental observations, we find that a higher grafting density of charged quaternary ammonium surfactant ions promotes exfoliation, by a mechanism whereby the clay sheets slide transversally over one another. We can determine the elastic properties of these nanocomposites; exfoliated and partially exfoliated morphologies lead to substantial enhancement of the Young's modulus, as found experimentally.
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Affiliation(s)
- James L Suter
- Centre for Computational Science, University College London , 20 Gordon Street, London, WC1H 0AJ, United Kingdom
| | - Derek Groen
- Centre for Computational Science, University College London , 20 Gordon Street, London, WC1H 0AJ, United Kingdom
| | - Peter V Coveney
- Centre for Computational Science, University College London , 20 Gordon Street, London, WC1H 0AJ, United Kingdom
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33
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Xie S, Istrate OM, May P, Barwich S, Bell AP, Khan U, Coleman JN. Boron nitride nanosheets as barrier enhancing fillers in melt processed composites. NANOSCALE 2015; 7:4443-4450. [PMID: 25679478 DOI: 10.1039/c4nr07228f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work we have used melt-processing to mix liquid-exfoliated boron-nitride nanosheets with PET to produce composites for gas barrier applications. Sonication of h-BN powder, followed by centrifugation-based size-selection, was used to prepare suspensions of nanosheets with aspect ratio >1000. The solvent was removed to give a weakly aggregated powder which could easily be mixed into PET, giving a composite containing well-dispersed nanosheets. These composites showed very good barrier performance with oxygen permeability reductions of 42% by adding just 0.017 vol% nanosheets. At low loading levels the composites were almost completely transparent. At higher loading levels, while some haze was introduced, the permeability fell by ∼70% on addition of 3 vol% nanosheets.
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Affiliation(s)
- Shaobo Xie
- School of Physics, CRANN and AMBER, Trinity College Dublin, Dublin 2, Ireland.
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34
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Suter JL, Groen D, Coveney PV. Chemically specific multiscale modeling of clay-polymer nanocomposites reveals intercalation dynamics, tactoid self-assembly and emergent materials properties. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:966-84. [PMID: 25488829 PMCID: PMC4368376 DOI: 10.1002/adma.201403361] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 11/03/2014] [Indexed: 05/23/2023]
Abstract
A quantitative description is presented of the dynamical process of polymer intercalation into clay tactoids and the ensuing aggregation of polymer-entangled tactoids into larger structures, obtaining various characteristics of these nanocomposites, including clay-layer spacings, out-of-plane clay-sheet bending energies, X-ray diffractograms, and materials properties. This model of clay-polymer interactions is based on a three-level approach, which uses quantum mechanical and atomistic descriptions to derive a coarse-grained yet chemically specific representation that can resolve processes on hitherto inaccessible length and time scales. The approach is applied to study collections of clay mineral tactoids interacting with two synthetic polymers, poly(ethylene glycol) and poly(vinyl alcohol). The controlled behavior of layered materials in a polymer matrix is centrally important for many engineering and manufacturing applications. This approach opens up a route to computing the properties of complex soft materials based on knowledge of their chemical composition, molecular structure, and processing conditions.
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Affiliation(s)
- James L Suter
- Centre for Computational Science, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
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35
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Li W, Sun L, Pan L, Lan Z, Jiang T, Yang X, Luo J, Li R, Tan L, Zhang S, Yu M. Dendrimer-like assemblies based on organoclays as multi-host system for sustained drug delivery. Eur J Pharm Biopharm 2014; 88:706-17. [PMID: 25308929 DOI: 10.1016/j.ejpb.2014.09.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 09/22/2014] [Accepted: 09/25/2014] [Indexed: 12/20/2022]
Abstract
Chemical modification of nanoclay will ensure further progress on these materials. In this work, we show that montmorillonite (MTM) nanosheets can be modified with β-cyclodextrin (CD) via a nucleophilic substitution reaction between mono-6-(p-toluenesulfonyl)-6-deoxy-β-CD and an amino group of 3-aminopropyltriethoxysilane (APTES)-functionalized MTM. The resulting MTM-APTES-CD can be further self-assembled into dendrimer-like assemblies, exhibit a well-dispersed property even in Dulbecco's phosphate-buffered saline and do not aggregate for a period of at least 20days. The structure, morphology and assembly mechanism are systematically studied by (29)Si MAS NMR, FT-IR, (1)H NMR, SEM, FE-TEM, DLS and AFM, and the change in assemblies during the drug release is monitored using FE-TEM images. MTT assays indicate that the assemblies only have low cytotoxicity, while CLSM and TEM observations reveal that the assemblies can easily penetrate cultured human endothelial cells. When clopidogrel is used as a guest molecule, the assemblies show not only much higher loading capacities compared to MTM and other containing β-CD assemblies or nanoparticles, but also a sustained release of clopidogrel up to 30days. This is attributed to the fact that the guest molecule is both supramolecularly complexed within the dendritic scaffold and intercalated into CD and MTM hosts. Host-guest systems between assemblies and various guests hold promising applications in drug delivery system and in the biomedical fields.
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Affiliation(s)
- Wei Li
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing, PR China; Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, PR China
| | - Lili Sun
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing, PR China
| | - Lijun Pan
- Pharmaceutical Teaching Laboratory, Chongqing Medical University, Chongqing, PR China
| | - Zuopin Lan
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing, PR China
| | - Tao Jiang
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing, PR China
| | - Xiaolan Yang
- College of Laboratory Medicine, Chongqing Medical University, Chongqing, PR China
| | - Jianchun Luo
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing, PR China
| | - Ronghua Li
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing, PR China
| | - Liqing Tan
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing, PR China
| | - Shurong Zhang
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing, PR China
| | - Mingan Yu
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing, PR China.
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