1
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Sahle-Demessie E, Han C, Varughese E, Acrey B, Zepp R. Fragmentation and release of pristine and functionalized carbon nanotubes from epoxy-nanocomposites during accelerated weathering. ENVIRONMENTAL SCIENCE. NANO 2023; 10:1812-1827. [PMID: 37849916 PMCID: PMC10581393 DOI: 10.1039/d2en01014c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2023]
Abstract
There is an increasing volume of nano-enabled materials in the market. Once composites containing nano-additives are disposed of, weathering could deteriorate their structures, releasing nanoparticles and risking exposure of humans and aquatic organisms. Composite degradation due to environmental aging continues, including structural deterioration resulting in cracking, fragmentation, and release of microplastics and nano-additives to the environment. This research aims to study the degradation and release of initially embedded nanomaterials (NMs) from composites and their toxicity. The molecular interaction of carbon nanotube (CNT)/polymer composites is critical for modifying the polymer properties. This study investigated the interactions of functional multiwalled carbon nanotube (MWCNT) composites which affect their release during accelerated weathering processes. Different epoxy-MWCNT composites were prepared by filling a polymer with pure MWCNTs and MWCNTs functionalized with acid (- COOH ) and amine (- NH 2 ) groups. The physical and chemical changes of aged composites were characterized by gravimetric analysis, contact angle measurements, FTIR, SEM, and laser confocal microscopy. A loss of hydrophobicity was observed for composite surfaces long before surface cracks materialized. Released polymer fragments and nanoparticles were analyzed in wash water using TEM, FTIR and Raman spectroscopy. The environmental risks for long-term use of CNT-polymer composites and the influence of fillers on the extent of chemical photodegradation depended on the combination of polymer and fillers. If nanoparticles are released from the matrix, the high surface-to-volume ratio and reactivity of NMs make them highly dynamic in environmental systems. Exposure to these released NMs could negatively affect human health and the environment. This study provides fragmentation and CNT particle release data that could describe how molecular-level interactions between functionalized CNTs and epoxy polymers affect the aging and release of CNTs. A toxicity assessment based on a reactive oxygen species (ROS) formation assay and MTS assay for cell viability and activity of the released polymer and CNT fragments and leachate showed moderate levels of cytotoxicity of released materials as compared to pristine epoxy plates.
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Affiliation(s)
- Endalkachew Sahle-Demessie
- U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Solution and Emergency Response, Cincinnati, OH, 45268, USA
| | - Changseok Han
- Department of Environmental Engineering, INHA University, Incheon 22212, Korea
- Program in Environmental & Polymer Engineering, Graduate School of INHA University, Incheon 22212, Korea
| | - Eunice Varughese
- U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Solution and Emergency Response, Cincinnati, OH, 45268, USA
| | - Brad Acrey
- U.S. Environmental Protection Agency, Region 4, Science and Ecosystem Support Division Laboratory, Athens, GA 30605, USA
| | - Richard Zepp
- U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Athens, GA 30605, USA
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2
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Design of interconnected
1D
nanomaterials with selective localization in biodegradable binary thermoplastic nanocomposite films for effective electromagnetic interference shielding effectiveness. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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3
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Farhadpour M, Jahanaray B, Pircheraghi G, Bagheri R. Simultaneous use of physical and chemical dispersants for electrical conductivity enhancement in polyamide 6/carbon nanotube/conductive carbon black hybrid nanocomposites. POLYM-PLAST TECH MAT 2022. [DOI: 10.1080/25740881.2021.1978488] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Mohammad Farhadpour
- Polymeric Materials Research Group, Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Babak Jahanaray
- Innovation and Technology Centre, Parsa Polymer Sharif Co, Tehran, Iran
| | - Gholamreza Pircheraghi
- Polymeric Materials Research Group, Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Reza Bagheri
- Polymeric Materials Research Group, Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
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4
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Yuan Z, Chen X, Yu D. Recent Advances in Elongational Flow Dominated Polymer Processing Technologies. Polymers (Basel) 2021; 13:polym13111792. [PMID: 34072286 PMCID: PMC8199109 DOI: 10.3390/polym13111792] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/25/2021] [Accepted: 05/25/2021] [Indexed: 01/20/2023] Open
Abstract
The continuous development of plasticizing conveying methods and devices has been carried out to meet the needs of the polymer processing industry. As compared to the conventional shear-flow-dominated plasticizing and conveying techniques, a new method for processing polymers based on elongational flow was proposed. This new method and the related devices such as vane extruders, eccentric rotor extruders and so on, exhibited multiple advantages including shorter processing time, higher mixing effectiveness, improved product performance and better adaptability to various material systems. The development of new techniques in the field of polymer material processing has opened up a broad space for the development of new plastic products, improved product performance and reduced processing costs. In this review, recent advances concerning the processing techniques based on elongational flow are summarized, and the broad applications in polymer processing as well as some future opportunities and challenges in this vibrant area are elucidated in detail.
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5
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Yang Z, Li Q, Tong Y, Wu T, Feng Y. Homogeneous dispersion of multiwalled carbon nanotubes
via in situ
bubble stretching and synergistic cyclic volume stretching for conductive LDPE/MWCNTs nanocomposites. POLYM ENG SCI 2019. [DOI: 10.1002/pen.25208] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zhitao Yang
- National Engineering Research Center of Novel Equipment for Polymer ProcessingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced ManufacturingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Key Laboratory of Polymer Processing Engineering, Ministry of EducationSouth China University of Technology Guangzhou Guangdong 510640 PR China
| | - Qingsong Li
- National Engineering Research Center of Novel Equipment for Polymer ProcessingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced ManufacturingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Key Laboratory of Polymer Processing Engineering, Ministry of EducationSouth China University of Technology Guangzhou Guangdong 510640 PR China
| | - Yizhang Tong
- National Engineering Research Center of Novel Equipment for Polymer ProcessingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced ManufacturingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Key Laboratory of Polymer Processing Engineering, Ministry of EducationSouth China University of Technology Guangzhou Guangdong 510640 PR China
| | - Ting Wu
- National Engineering Research Center of Novel Equipment for Polymer ProcessingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced ManufacturingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Key Laboratory of Polymer Processing Engineering, Ministry of EducationSouth China University of Technology Guangzhou Guangdong 510640 PR China
| | - Yanhong Feng
- National Engineering Research Center of Novel Equipment for Polymer ProcessingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced ManufacturingSouth China University of Technology Guangzhou Guangdong 510640 PR China
- Key Laboratory of Polymer Processing Engineering, Ministry of EducationSouth China University of Technology Guangzhou Guangdong 510640 PR China
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6
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Bhagavathi Kandy S, Simon GP, Cheng W, Zank J, Saito K, Bhattacharyya AR. Effect of Organic Modification on Multiwalled Carbon Nanotube Dispersions in Highly Concentrated Emulsions. ACS OMEGA 2019; 4:6647-6659. [PMID: 31459790 PMCID: PMC6648309 DOI: 10.1021/acsomega.8b03179] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 02/20/2019] [Indexed: 06/10/2023]
Abstract
Highly concentrated water-in-oil emulsions incorporating multiwalled carbon nanotubes (MWCNTs) are prepared. Homogeneous and selective dispersions of MWCNTs throughout the oil phase of the emulsions are investigated. The practical insolubility of carbon nanotubes (CNTs) in aqueous and organic media necessitates the disentanglement of CNT "agglomerates" through the utilization of functionalized CNTs. The design and synthesis of two tetra-alkylated pyrene derivatives, namely, 1,3,6,8-tetra(oct-1-yn-1-yl)pyrene (TOPy) and 1,3,6,8-tetra(dodec-1-yn-1-yl)pyrene (TDPy), for the noncovalent organic modification of MWCNTs are reported. The modifier molecules are designed in such a manner that they facilitate an improved dispersion of individualized MWCNTs in the continuous-oil phase of the highly concentrated emulsion (HCE). Transmission electron microscopic analyses suggest that the alkylated pyrene molecules are adsorbed on the MWCNT surface, and their adsorption eventually results in the debundling of MWCNT agglomerates. Fourier transform infrared, Raman, and fluorescence spectroscopic analyses confirm the π-π interaction between the alkylated pyrene molecules and MWCNTs. The noncovalent modification significantly improves the effective debundling and selective dispersion of MWCNTs in HCEs.
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Affiliation(s)
- Sharu Bhagavathi Kandy
- IITB-Monash
Research Academy and Department of Metallurgical Engineering and
Materials Science, Indian Institute of Technology
Bombay, Powai, Mumbai 400076, India
- Department
of Thermal and Energy Engineering, School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamilnadu 632014, India
| | - George P. Simon
- Department of Materials Science and Engineering, Department of Chemical
Engineering, and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Wenlong Cheng
- Department of Materials Science and Engineering, Department of Chemical
Engineering, and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Johann Zank
- Orica Mining
Services, George Booth
Drive, Kurri Kurri, New South
Wales 2327, Australia
| | - Kei Saito
- Department of Materials Science and Engineering, Department of Chemical
Engineering, and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Arup R. Bhattacharyya
- IITB-Monash
Research Academy and Department of Metallurgical Engineering and
Materials Science, Indian Institute of Technology
Bombay, Powai, Mumbai 400076, India
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7
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Rathod V, Tripathi R, Joshi P, Jha PK, Bahadur P, Tiwari S. Paclitaxel Encapsulation into Dual-Functionalized Multi-Walled Carbon Nanotubes. AAPS PharmSciTech 2019; 20:51. [PMID: 30617845 DOI: 10.1208/s12249-018-1218-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 10/08/2018] [Indexed: 01/31/2023] Open
Abstract
This work reports the synthesis of multi-walled carbon nanotubes (CNTs) from xylene/ferrocene using catalytic chemical vapor deposition technique. Following characterization using transmission electron microscopy (TEM), energy-dispersive X-ray (EDX), and Raman spectroscopy, CNT surface was dual-functionalized using ethylenediamine and phenylboronic acid groups. Average diameter of CNTs was calculated to be 16.5 nm. EDX spectra confirmed the existence of carbonaceous deposits on the tube's surface. Scattered electron diffraction and X-ray peak broadening calculations showed consistent inter-planer distance of the grown CNTs. Chemical functionalization, confirmed from FT-IR and Raman spectra, showed an enhanced dispersibility of CNTs in water. We describe the changes in the first- and second-order regions of the Raman spectra following the encapsulation of an anti-cancer drug, paclitaxel (PLX), into the free volume of functionalized CNTs. High PLX loading, achieved through its non-covalent π-π stacking within the CNT interior, is confirmed through the blue-shifted, softened G band in the Raman spectrum. While not addressed here, we will exploit this dual functionalization tactic to elaborate the relative role of attached moieties in the affinity interaction of CNTs with extra-cellular sialic acid, a biological target showing metastatic stage-dependent over-expression in colon cancer cells.
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8
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Tri PN, Prud’homme RE. Nanoscale Lamellar Assembly and Segregation Mechanism of Poly(3-hydroxybutyrate)/Poly(ethylene glycol) Blends. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b02019] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Phuong Nguyen Tri
- Department of Chemistry, Université de Montréal, PO Box 6128
Centre-ville STN, Montréal H3C 3J7, Québec, Canada
| | - Robert E. Prud’homme
- Department of Chemistry, Université de Montréal, PO Box 6128
Centre-ville STN, Montréal H3C 3J7, Québec, Canada
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9
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Liebscher M, Domurath J, Krause B, Saphiannikova M, Heinrich G, Pötschke P. Electrical and melt rheological characterization of PC and co-continuous PC/SAN blends filled with CNTs: Relationship between melt-mixing parameters, filler dispersion, and filler aspect ratio. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24515] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Marco Liebscher
- Leibniz-Institut für Polymerforschung Dresden e.V. (Leibniz Institute of Polymer Research Dresden, IPF), Hohe Str. 6; Dresden D-01069 Germany
- Technische Universität Dresden; Dresden D-01062 Germany
| | - Jan Domurath
- Leibniz-Institut für Polymerforschung Dresden e.V. (Leibniz Institute of Polymer Research Dresden, IPF), Hohe Str. 6; Dresden D-01069 Germany
- Institut de Recherche Dupuy de Lôme (IRDL), Univ. Bretagne Sud, FRE CNRS 3744, IRDL; Lorient F-56100 France
| | - Beate Krause
- Leibniz-Institut für Polymerforschung Dresden e.V. (Leibniz Institute of Polymer Research Dresden, IPF), Hohe Str. 6; Dresden D-01069 Germany
| | - Marina Saphiannikova
- Leibniz-Institut für Polymerforschung Dresden e.V. (Leibniz Institute of Polymer Research Dresden, IPF), Hohe Str. 6; Dresden D-01069 Germany
| | - Gert Heinrich
- Leibniz-Institut für Polymerforschung Dresden e.V. (Leibniz Institute of Polymer Research Dresden, IPF), Hohe Str. 6; Dresden D-01069 Germany
- Technische Universität Dresden; Dresden D-01062 Germany
| | - Petra Pötschke
- Leibniz-Institut für Polymerforschung Dresden e.V. (Leibniz Institute of Polymer Research Dresden, IPF), Hohe Str. 6; Dresden D-01069 Germany
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10
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Conducting melt blending of polystyrene and
EVA
copolymer with carbon nanotube assisted by phosphonium‐based ionic liquid. J Appl Polym Sci 2017. [DOI: 10.1002/app.45564] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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11
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R V, Pattnaik T, Poyekar AV, Joseph K, Simon GP, Bhattacharyya AR. Morphology and Electrical Conductivity of Ternary Polymer Blends Involving Liquid Crystalline Polymer Containing Carbon Nanotubes. ChemistrySelect 2017. [DOI: 10.1002/slct.201700520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Vivek. R
- IITB-Monash Research Academy; Indian Institute of Technology Bombay; Powai Mumbai- 400076 India
- Department of Metallurgical Engineering and Materials Science; Indian Institute of Technology Bombay; Powai Mumbai- 400076 India
- Department of Materials Engineering; Monash University; Clayton Victoria- 3800 Australia
| | - Tilak Pattnaik
- Department of Metallurgical Engineering and Materials Science; Indian Institute of Technology Bombay; Powai Mumbai- 400076 India
| | - Amrita V. Poyekar
- IITB-Monash Research Academy; Indian Institute of Technology Bombay; Powai Mumbai- 400076 India
- Department of Metallurgical Engineering and Materials Science; Indian Institute of Technology Bombay; Powai Mumbai- 400076 India
- Department of Materials Engineering; Monash University; Clayton Victoria- 3800 Australia
| | - Kuruvilla Joseph
- Department of Chemistry; Indian Institute of Space Science and Technology; Thiruvananthapuram Kerala- 695547 India
| | - George P. Simon
- Department of Materials Engineering; Monash University; Clayton Victoria- 3800 Australia
| | - Arup R. Bhattacharyya
- Department of Metallurgical Engineering and Materials Science; Indian Institute of Technology Bombay; Powai Mumbai- 400076 India
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12
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Kulkarni A, Mukhopadhyay N, Bhattacharyya AR, Panwar AS. Dispersion of non-covalently modified graphene in aqueous medium: a molecular dynamics simulation approach. RSC Adv 2017. [DOI: 10.1039/c6ra26263e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Electric potential variation between two graphene sheets upon adsorption of Na-AHA molecules.
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Affiliation(s)
- Aditya Kulkarni
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
| | - Nabaneeta Mukhopadhyay
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
| | - Arup R. Bhattacharyya
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
| | - Ajay Singh Panwar
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
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13
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Xie LZ, Chen LC, Wang MZ, Wu QC, Zhou X, Ge XW. In-situ Enhanced Toughening of Poly(ethylene terephthalate)/elastomer Blends via Gamma-Ray Radiation at Presence of Trimethylolpropane Triacrylate. CHINESE J CHEM PHYS 2016. [DOI: 10.1063/1674-0068/29/cjcp1605105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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14
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Parija S, Bhattacharyya AR. Multiwalled carbon nanotubes-based polypropylene composites: Influence of interfacial interaction on the crystallization behavior of polypropylene. POLYM ENG SCI 2016. [DOI: 10.1002/pen.24399] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Suchitra Parija
- Department of Metallurgical Engineering and Materials Science; Indian Institute of Technology Bombay; Powai Mumbai 400076 India
| | - Arup R. Bhattacharyya
- Department of Metallurgical Engineering and Materials Science; Indian Institute of Technology Bombay; Powai Mumbai 400076 India
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15
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Bindhu B, Sharu BK, Gopika MS, Praseetha PK, Veluraja K. Molybdenum disulfide nanoflakes through Li-AHA assisted exfoliation in an aqueous medium. RSC Adv 2016. [DOI: 10.1039/c5ra25368c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel route to synthesize MoS2 nanoflakes though Li-AHA assisted liquid phase exfoliation.
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Affiliation(s)
- B. Bindhu
- Department of Physics
- Noorul Islam Centre for Higher Education
- India
| | - B. K. Sharu
- School of Mechanical and Building Sciences
- VIT University
- Vellore-632014
- India
| | - M. S. Gopika
- Department of Physics
- Noorul Islam Centre for Higher Education
- India
| | - P. K. Praseetha
- Department of Nanotechnology
- Noorul Islam Centre for Higher Education
- India
| | - K. Veluraja
- School of Advanced Sciences
- VIT University
- Vellore-632014
- India
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16
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Parija S, Bhattacharyya AR. Role of interfacial interactions to control the extent of wrapping of polymer chains on multi-walled carbon nanotubes. RSC Adv 2016. [DOI: 10.1039/c6ra06258j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Transmission electron microscopic image of separated MWCNTs (N51L15G5) showing the wrapped polymer chains on the MWCNTs surface, which corresponds to the α-phase of the PP.
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Affiliation(s)
- Suchitra Parija
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Arup R. Bhattacharyya
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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17
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Banerjee J, Panwar AS, Mukhopadhyay K, Saxena AK, Bhattacharyya AR. Deagglomeration of multi-walled carbon nanotubes via an organic modifier: structure and mechanism. Phys Chem Chem Phys 2015; 17:25365-78. [PMID: 26358546 DOI: 10.1039/c5cp03736k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have investigated the agglomeration behaviour of two types of multi-walled carbon nanotubes (MWNTs; N-MWNTs and D-MWNTs), which have different chemical functionalities, average diameter, varying extent of agglomeration and agglomerations. The properties were altered by varying the agglomerated structure. The strength of the MWNT agglomerates was estimated via nanoindentation. The work done to indent D-MWNT agglomerates (3910.3 × 10(-8) erg) was higher than for N-MWNTs agglomerates (2316.4 × 10(-8) erg). An organic modifier, the Li salt of 6-aminohexanoic acid (Li-AHA), was used to deagglomerate the MWNTs in an aqueous medium. The stability of the aqueous dispersion of Li-AHA-modified MWNTs was analyzed by UV-vis spectroscopy and zeta potential measurements. An increase in Li-AHA concentration increased the dispersion of MWNTs in the aqueous medium. Furthermore, the mechanism of dispersion of the two types of MWNTs in the aqueous medium in the presence of Li-AHA was determined based on the electrostatic charge repulsion between the negatively charged species. A fluorescence-activated cell sorting technique was used to assess the debundling of MWNT agglomerates in the aqueous medium. We examined the morphology-property relationship in Li-AHA-modified MWNTs.
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Affiliation(s)
- Joyita Banerjee
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
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18
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Morphology evolution, conductive and viscoelastic behaviors of chemically reduced graphene oxide filled poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) nanocomposites during annealing. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1666-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Lin CY, Liu T, Zuo M, Li HH, Chen Q, Zheng Q. Effect of chemically reduced graphene oxide on the isothermal and non-isothermal phase separation behavior of poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) binary polymer blends. RSC Adv 2015. [DOI: 10.1039/c5ra16036g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The applicability of WLF function to phase separation behavior of filled systems indicates that CRGO hardly changes the viscous diffusion essence of segments. Furthermore, the effect of CRGO on the phase behavior is dependent on their composition.
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Affiliation(s)
- Chao-ying Lin
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ting Liu
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Min Zuo
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Hui-hui Li
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Qi Chen
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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20
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Mukhopadhyay N, Panwar AS, Kumar G, Samajdar I, Bhattacharyya AR. Influence of non-covalent modification of multiwalled carbon nanotubes on the crystallization behaviour of binary blends of polypropylene and polyamide 6. Phys Chem Chem Phys 2015; 17:4293-310. [DOI: 10.1039/c4cp05060f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
‘Agglomerated’ and ‘individualized’ MWNTs providing varying extent of hetero-nucleation to the polymer chains.
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Affiliation(s)
- Nabaneeta Mukhopadhyay
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Ajay S. Panwar
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Gulshan Kumar
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - I. Samajdar
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Arup R. Bhattacharyya
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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21
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Massoumi B, Badr-Valizad V, Jaymand M. In situ chemical oxidative graft polymerization of aniline from phenylamine end-caped poly(ethylene glycol)-functionalized multi-walled carbon nanotubes. RSC Adv 2015. [DOI: 10.1039/c5ra06332a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The aim of this study is the in situ chemical oxidative graft polymerization of aniline from phenylamine end-caped poly(ethylene glycol)-functionalized multi-walled carbon nanotubes.
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Affiliation(s)
- Bakhshali Massoumi
- Department of Chemistry
- Payame Noor University
- Tehran
- Islamic Republic of Iran
| | | | - Mehdi Jaymand
- Research Center for Pharmaceutical Nanotechnology
- Tabriz University of Medical Sciences
- Tabriz
- Islamic Republic of Iran
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Sreekanth MS, Panwar AS, Pötschke P, Bhattacharyya AR. Influence of hybrid nano-filler on the crystallization behaviour and interfacial interaction in polyamide 6 based hybrid nano-composites. Phys Chem Chem Phys 2015; 17:9410-9. [DOI: 10.1039/c5cp00018a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
‘Agglomerated’ and ‘debundled’ structure of EG/MWNTs hybrid providing hetero-nucleation to PA6 chain. The dispersion state of the hybrid filler in PA6 changes from ‘agglomerated and stacked’ state to ‘debundled and exfoliated’ state in the presence of Li-AHA modified hybrid filler.
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Affiliation(s)
- M. S. Sreekanth
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Ajay S. Panwar
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Petra Pötschke
- Department of Functional Nanocomposites and Blends
- Leibniz Institute of Polymer Research Dresden
- D-01069 Dresden
- Germany
| | - Arup R. Bhattacharyya
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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