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Agrawal M, Nandan B, Srivastava RK. Unique Crystallization Characteristics of Pickering High Internal Phase Emulsion Templated Porous Constructs. Langmuir 2024; 40:4893-4903. [PMID: 38373200 DOI: 10.1021/acs.langmuir.3c03838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
To study the crystallization behavior of polymeric chains under the influence of porosity, the thermal properties of various nonporous and porous poly(ε-caprolactone) (PCL) based constructs were investigated. Porous cross-linked PCL nanocomposite constructs were fabricated utilizing in situ polymerization of CL-based surfactant-free Pickering high internal phase emulsions (HIPEs), stabilized using modified fumed silica nanoparticles (mSiNP) at a minimal concentration of 0.6 wt %. The corresponding nanocomposite constructs exhibited polyhedral pore morphology with significant pore roughness due to the presence of mSiNP. DSC thermograms of nonporous constructs illustrated diminished crystallization temperature and kinetics upon cross-linking and inclusion of mSiNP which confirmed suppressed mobility of polymer chains. Further introduction of porosity led to substantial supercooling, resulting in crystallization temperatures as low as -24 °C. Changes in the crystal structure of various nonporous and porous constructs were also studied using XRD. The crystallization behavior of porous constructs was finally evaluated using Jeziorny, Ozawa, and Mo theories under nonisothermal conditions. Significant deviation from the theoretical model, as observed in the case of porous constructs, implied a complex crystallization mechanism that eventually was not only controlled by the chain immobility due to cross-linking but also heterogeneity present in the wall thickness of the constructs. The unique melting-crystallization phenomenon observed in such constructs may further be expanded to other systems of high heat capacity for utilization as energy storage materials.
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Affiliation(s)
- Meenal Agrawal
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Rajiv K Srivastava
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India
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Bandyopadhyay S, Joshi A, Gupta A, Srivastava RK, Nandan B. Solid Polymer Electrolytes with Dual Anion Synergy and Twofold Reinforcement Effect for All-Solid-State Lithium Batteries. ACS Appl Mater Interfaces 2023. [PMID: 37874931 DOI: 10.1021/acsami.3c11377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Solid polymer electrolytes (SPEs) have emerged as a viable alternative to traditional organic liquid-based electrolytes for high energy density and safer lithium batteries. Poly(ethylene oxide) (PEO)-based SPEs are considered one of the mainstream SPE materials with excellent dissociation ability of lithium salts. However, the inferior ionic conductivity at room temperature and poor dimensional stability at high temperature limit their utilization. In this work, a semi-interpenetrating polymer network (semi-IPN) forming a precursor based on an ionic liquid (IL) monomer and linear PEO chains were introduced into an electrospun poly(acrylonitrile) (PAN) fibrous mat with subsequent thermal-initiated cross-linking. 1,4-Diazabicyclo [2.2.2] octane (DABCO) and 4-(chloromethyl) styrene were used to synthesize the styrenic-DABCO-based IL monomer with bis(trifluoromethane sulfonyl)imide (TFSI-) or bis(fluoromethane sulfonyl)imide (FSI-) as the anion, named as SDTFSI and SDFSI, respectively. Together, the FSI- and TFSI- anions demonstrate a synergistic effect in providing ion-conductive LiF and Li3N-rich inorganic SEI layer with enhanced lithium dendrite suppression ability. The twofold reinforcement effect is achieved collectively from the semi-IPN structure and the three-dimensional (3D) PAN network that help to construct highly efficient and uniform ion transport channels with excellent flexibility, further suppressing the lithium dendrite growth. The SPEs were dimensionally stable even at elevated temperatures of 150 °C. Moreover, the SPEs show an ionic conductivity of 4.4 × 10-4 S cm-1 at 25 °C and 1.81 × 10-3 S cm-1 at 55 °C and a lithium-ion transference number of 0.56. The favorable electrochemical performance of the SPEs was verified by operating LiFePO4/Li and NMC/Li cells.
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Affiliation(s)
- Sumana Bandyopadhyay
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
| | - Aashish Joshi
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
- School of Interdisciplinary Research, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
| | - Amit Gupta
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
| | - Rajiv K Srivastava
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
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Rani S, Kathuria I, Kumar A, Kumar D, Kumar A, Kumar S, Nandan B, Srivastava RK. Valorised polypropylene waste based reversible sensor for copper ion detection in blood and water. Environ Res 2023; 228:115928. [PMID: 37076032 DOI: 10.1016/j.envres.2023.115928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 04/11/2023] [Accepted: 04/15/2023] [Indexed: 05/03/2023]
Abstract
Heavy metals and plastic pollutants are the two most disastrous challenges to the environment requiring immediate actions. In this work, a techno-commercially feasible approach to address both challenges is presented, where a waste polypropylene (PP) based reversible sensor is produced to selectively detect copper ions (Cu2+) in blood and water from different sources. The waste PP-based sensor was fabricated in the form of an emulsion-templated porous scaffold decorated with benzothiazolinium spiropyran (BTS), which produced a reddish colour upon exposure to Cu2+. The presence of Cu2+ was checked by naked eye, UV-Vis spectroscopy, and DC (Direct Current) probe station by measuring the current where the sensor's performance remained unaffected while analysing blood, water from different sources, and acidic or basic environment. The sensor exhibited 1.3 ppm as the limit of detection value in agreement with the WHO recommendations. The reversible nature of the sensor was determined by cyclic exposure of the sensor towards visible light turning it from coloured to colourless within 5 min and regenerated the sensor for the subsequent analysis. The reversibility of the sensor through exchange between Cu2+- Cu+ was confirmed by XPS analysis. A resettable and multi-readout INHIBIT logic gate was proposed for the sensor using Cu2+ and visible light as the inputs and colour change, reflectance band and current as the output. The cost-effective sensor enabled rapid detection of the presence of Cu2+ in both water and complex biological samples such as blood. While the approach developed in this study provides a unique opportunity to address the environmental burden of plastic waste management, it also allows for the possible valorization of plastics for use in enormous value-added applications.
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Affiliation(s)
- Sweety Rani
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Ishana Kathuria
- Department of Chemistry, St. Stephens College, University of Delhi, North Campus, New Delhi, 110007, India
| | - Arvind Kumar
- Department of Chemistry, St. Stephens College, University of Delhi, North Campus, New Delhi, 110007, India
| | - Dheeraj Kumar
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Advitiya Kumar
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Satish Kumar
- Department of Chemistry, St. Stephens College, University of Delhi, North Campus, New Delhi, 110007, India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Rajiv K Srivastava
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
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Singh S, Kumar L, Horechyy A, Aftenieva O, Mittal M, Sanwaria S, Srivastava RK, König TAF, Fery A, Nandan B. Block Copolymer-Templated Au@CdSe Core-Satellite Nanostructures with Solvent-Dependent Optical Properties. Langmuir 2023; 39:6231-6239. [PMID: 37074843 DOI: 10.1021/acs.langmuir.3c00479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In the present work, we report the fabrication and characterization of well-defined core-satellite nanostructures. These nanostructures comprise block copolymer (BCP) micelles, containing a single gold nanoparticle (AuNP) in the core and multiple photoluminescent cadmium selenide (CdSe) quantum dots (QDs) attached to the micelle's coronal chains. The asymmetric polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) BCP was employed to develop these core-satellite nanostructures in a series of P4VP-selective alcoholic solvents. The BCP micelles were first prepared in 1-propanol and subsequently mixed with AuNPs, followed by gradual addition of CdSe QDs. This method resulted in the development of spherical micelles that contained a PS/Au core and a P4VP/CdSe shell. These core-satellite nanostructures, developed in different alcoholic solvents, were further employed for the time-resolved photoluminescence analysis. It was found that solvent-selective swelling of the core-satellite nanostructures tunes the distance between the QDs and AuNPs and modulates their Förster resonance energy transfer (FRET) behavior. The average lifetime of the donor emission varied from 12.3 to 10.3 nanoseconds (ns) with the change in the P4VP-selective solvent within the core-satellite nanostructures. Furthermore, the distances between the donor and acceptor were also calculated using efficiency measurements and corresponding Förster distances. The resulting core-satellite nanostructures hold promising potential in various fields, such as photonics, optoelectronics, and sensors that utilize the FRET process.
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Affiliation(s)
- Sajan Singh
- Department of Textile & Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi- 110016, India
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, Dresden 01069, Germany
| | - Labeesh Kumar
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, Dresden 01069, Germany
| | - Andriy Horechyy
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, Dresden 01069, Germany
| | - Olha Aftenieva
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, Dresden 01069, Germany
| | - Mona Mittal
- Department of Chemistry, Galgotia College of Engineering and Technology, Greater Noida, Uttar Pradesh 201310, India
| | - Sunita Sanwaria
- Department of Chemistry, Deshbandhu College, University of Delhi, Delhi 110019, India
| | - Rajiv K Srivastava
- Department of Textile & Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi- 110016, India
| | - Tobias A F König
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, Dresden 01069, Germany
- Technische Universität Dresden, Physical Chemistry of Polymer Materials, 01062 Dresden, Germany
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, Dresden 01069, Germany
- Technische Universität Dresden, Physical Chemistry of Polymer Materials, 01062 Dresden, Germany
| | - Bhanu Nandan
- Department of Textile & Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi- 110016, India
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Agrawal M, Yadav A, Takkar S, Kulshreshtha R, Nandan B, Srivastava RK. Dual-functionalized Pickering HIPE templated poly(ɛ-caprolactone) scaffold for maxillofacial implants. Int J Pharm 2023; 633:122611. [PMID: 36646256 DOI: 10.1016/j.ijpharm.2023.122611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/15/2023]
Abstract
High internal phase emulsion (HIPE) templated poly (ɛ-caprolactone) (PCL) scaffolds have gained widespread attention for large-sized bone defects due to its tuneable 3D architecture and ease of fabricating crosslinked PCL (cPCL) scaffolds. However, extremely high stabilizer (surfactant or nanoparticle) concentration and negligence of microenvironment for regeneration sites like alveolar bones have restrained industrial acceptance of these scaffolds. Herein, we demonstrated the fabrication of nanocomposite cPCL scaffolds within Pickering HIPE templates stabilized using modified silica nanoparticles (mSiNP) concentrations as low as 0.1 to 1.0 wt%. Using an unconventional approach, the mSiNP Pickering stabilizer was added in dispersed phase, contradicting Bancroft's rule. The colloidal stability was attained due to faster drifting of mSiNP towards the interface when it was dispersed in silicone oil. Scaffolds with tuneable properties were fabricated by controlling the mSiNP concentration and ϕd. Further, cPCL scaffolds were functionalized using clove oil (CO) to improve their efficiency in eradicating S. aureus and E. coli by disrupting their cellular integrity. Additionally, formation of biofilm on the surface of the scaffolds was successfully inhibited by the incorporation of CO. CO-functionalized scaffolds demonstrated excellent cytocompatibility towards MG-63 cells allowing their successful adhesion and proliferation on the surface of the scaffolds.
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Affiliation(s)
- Meenal Agrawal
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Anilkumar Yadav
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Sonam Takkar
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Ritu Kulshreshtha
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Rajiv K Srivastava
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India.
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Ghosh S, Yadav A, Rani S, Takkar S, Kulshreshtha R, Nandan B, Srivastava RK. 3D Printed Hierarchical Porous Poly(ε-caprolactone) Scaffolds from Pickering High Internal Phase Emulsion Templating. Langmuir 2023; 39:1927-1946. [PMID: 36701663 DOI: 10.1021/acs.langmuir.2c02936] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In the realm of biomaterials, particularly bone tissue engineering, there has been a great increase in interest in scaffolds with hierarchical porosity and customizable multifunctionality. Recently, the three-dimensional (3D) printing of biopolymer-based inks (solutions or emulsions) has gained high popularity for fabricating tissue engineering scaffolds, which optimally satisfies the desired properties and performances. Herein, therefore, we explore the fabrication of 3D printed hierarchical porous scaffolds of poly(ε-caprolactone) (PCL) using the water-in-oil (w/o) Pickering PCL high internal phase emulsions (HIPEs) as the ink in 3D printer. The Pickering PCL HIPEs stabilized using hydrophobically modified nanoclay comprised of aqueous poly(vinyl alcohol) (PVA) as the dispersed phase. Rheological measurements suggested the shear thinning behavior of Pickering HIPEs having a dispersed droplet diameter of 3-25 μm. The pore morphology resembling the natural extracellular matrix and the mechanical properties of scaffolds were customized by tuning the emulsion composition and 3D printing parameters. In vitro biomineralization and drug release studies proved the scaffolds' potential in developing the apatite-rich bioactive interphase and controlled drug delivery, respectively. During in vitro osteoblast (MG63) growth experiments for up to 7 days, good adhesion and proliferation on PCL scaffolds confirmed their cytocompatibility, assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) analysis. This study suggests that the assembly of HIPE templates and 3D printing is a promising approach to creating hierarchical porous scaffolds potentially suitable for bone tissue engineering and can be stretched to other biopolymers as well.
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Affiliation(s)
- Sagnik Ghosh
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Anilkumar Yadav
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Sweety Rani
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Sonam Takkar
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Ritu Kulshreshtha
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Rajiv K Srivastava
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
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Gurave PM, Dubey S, Nandan B, Srivastava RK. Pickering Emulsion-Templated Nanocomposite Membranes for Excellent Demulsification and Oil-Water Separation. ACS Appl Mater Interfaces 2022; 14:54233-54244. [PMID: 36404643 DOI: 10.1021/acsami.2c16483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
A worldwide steady increase in oily wastewater, due to oil spillage and various industrial discharges, requires immediate efforts toward development of an effective strategy and materials to preserve the natural water bodies. Designing a superwettable fibrous membrane of robust structure and anti-fouling property for efficient separation of oil-water mixtures and emulsions is therefore highly demanding. The electrospun fibrous membrane, which possesses porosity and flexibility and properties including superwettability and tunable functionality, can be considered as apposite materials for this cause. In this approach, we combined two strategies, viz., Pickering emulsion and near gel resin (nGR) emulsion electrospinning together to produce a fibrous nanocomposite membrane for efficient oil-water separation and demulsification. nGR Pickering emulsions were stabilized using hydrophilic SiO2 nanoparticles and successfully optimized for fabricating the crosslinked core sheath-structured fibrous membrane. The prepared membrane provided twofold functionality due to the core sheath structure of the fibers. The crosslinked polystyrene core offered high oil adsorption capacity, whereas SiO2-functionalized crosslinked polyvinyl alcohol sheath provided a rough, superhydrophilic surface with underwater oleophobic behavior to the membrane. The optimized SiO2-Pickering emulsion-templated nanocomposite membrane demonstrated excellent underwater anti-oil adhesion behavior (UWOCA ∼148°) with efficient oil-water separation capacity of more than 99% and separation flux up to 3346 ± 91 L m-2 h-1. The membrane was evaluated against various oil-water emulsions and found to have a superior separation efficiency. Moreover, excellent anti-oil adhesion property provided the intact membrane, where consistent separation performance was achieved up to 10 separation cycles without any loss. The membrane was used for separation of hot oil-water emulsions and showed no structural disintegration or loss in separation performance when exposed to elevated temperatures. The developed nanocomposite membranes could efficiently be used for separation and demulsification, and their applications can be explored in various other fields including selective sorption, catalysis, and storage in future.
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Affiliation(s)
- Pramod M Gurave
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Shubhang Dubey
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Rajiv K Srivastava
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
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Kumar L, Horechyy A, Paturej J, Nandan B, Kłos JS, Sommer JU, Fery A. Encapsulation of Nanoparticles into Preformed Block Copolymer Micelles Driven by Competitive Solvation: Experimental Studies and Molecular Dynamic Simulations. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Labeesh Kumar
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
| | - Andriy Horechyy
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
| | - Jarosław Paturej
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
- Institute of Physics, University of Silesia, Chorzów, 41-500, Poland
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Jarosław S. Kłos
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
- Faculty of Physics, A. Mickiewicz University, Uniwersytetu Poznańskiego 2, 61-614Poznań, Poland
| | - Jens-Uwe Sommer
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
- Institute for Theoretical Physics, Technische Universität Dresden, Dresden01062, Germany
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
- Physical Chemistry of Polymer Materials, Technische Universität Dresden, Dresden01062, Germany
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Gurave PM, Nandan B, Srivastava RK. Emulsion templated dual crosslinked core-sheath fibrous matrices for efficient oil/water separation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128037] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Puneet P, Kumar L, Singh S, Horechyy A, Srivastava R, Nandan B. Reversal of Handedness of Ionic liquid based Chiral Block Copolymers via Self-Assembly in Solution and Bulk Phase. Polym Chem 2022. [DOI: 10.1039/d2py00186a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polymerized ionic liquid (PIL) based ionic chiral block copolymers (BCPs*) were synthesized by functionalization of poly(4-vinyl pyridine) segment in poly(styrene)-block-poly(4-vinyl pyridine) (PS-b-P4VP) block copolymer. Owing to the ease of ion...
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Pal S, Srivastava RK, Nandan B. Effect of spinning solvent on crystallization behavior of confined polymers in electrospun nanofibers. Polymer Crystallization 2021. [DOI: 10.1002/pcr2.10209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Sanchayan Pal
- Department of Textile and Fibre Engineering Indian Institute of Technology Delhi New Delhi Delhi India
| | - Rajiv K. Srivastava
- Department of Textile and Fibre Engineering Indian Institute of Technology Delhi New Delhi Delhi India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering Indian Institute of Technology Delhi New Delhi Delhi India
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Bandyopadhyay S, Raulo A, Puneet P, Gupta A, Srivastava R, Garg D, Sengupta A, Nandan B. Melt-diffused binary solid–solid ionic mixture in a porous polymeric host as free-standing solid electrolyte for lithium batteries. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kumar L, Singh S, Horechyy A, Fery A, Nandan B. Block Copolymer Template-Directed Catalytic Systems: Recent Progress and Perspectives. Membranes (Basel) 2021; 11:membranes11050318. [PMID: 33925335 PMCID: PMC8146702 DOI: 10.3390/membranes11050318] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/20/2021] [Accepted: 04/24/2021] [Indexed: 11/16/2022]
Abstract
Fabrication of block copolymer (BCP) template-assisted nano-catalysts has been a subject of immense interest in the field of catalysis and polymer chemistry for more than two decades now. Different methods, such as colloidal route, on-substrate methods, bulk self-assembly approaches, combined approaches, and many others have been used to prepare such nano-catalysts. The present review focuses on the advances made in this direction using diblock, triblock, and other types of BCP self-assembled structures. It will be shown how interestingly, researchers have exploited the features of tunable periodicity, domain orientation, and degree of lateral orders of self-assembled BCPs by using fundamental approaches, as well as using different combinations of simple methods to fabricate efficient catalysts. These approaches allow for fabricating catalysts that are used for the growth of single- and multi-walled carbon nanotubes (CNTs) on the substrate, size-dependent electrooxidation of the carbon mono oxide, cracking of 1,3,5-triisopropylbenzene (TIPB), methanol oxidation, formic acid oxidation, and for catalytic degradation of dyes and water pollutants, etc. The focus will also be on how efficient and ease-of-use catalysts can be fabricated using different BCP templates, and how these have contributed to the fabrication of different nano-catalysts, such as nanoparticle array catalysts, strawberry and Janus-like nanoparticles catalysts, mesoporous nanoparticles and film catalysts, gyroid-based bicontinuous catalysts, and hollow fiber membrane catalysts.
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Affiliation(s)
- Labeesh Kumar
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, 01069 Dresden, Germany;
| | - Sajan Singh
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India;
| | - Andriy Horechyy
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, 01069 Dresden, Germany;
- Correspondence: (A.H.); (A.F.); (B.N.); Tel.: +49-351-4658-324 (A.H.); +49-351-4658-225 (A.F.); +91-11-2659 6679 (B.N.)
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, 01069 Dresden, Germany;
- Institute of Physical Chemistry of Polymeric Materials, Technische Universität Dresden, 01062 Dresden, Germany
- Correspondence: (A.H.); (A.F.); (B.N.); Tel.: +49-351-4658-324 (A.H.); +49-351-4658-225 (A.F.); +91-11-2659 6679 (B.N.)
| | - Bhanu Nandan
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India;
- Correspondence: (A.H.); (A.F.); (B.N.); Tel.: +49-351-4658-324 (A.H.); +49-351-4658-225 (A.F.); +91-11-2659 6679 (B.N.)
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Singh S, Horechyy A, Yadav S, Formanek P, Hübner R, Srivastava RK, Sapra S, Fery A, Nandan B. Nanoparticle-Stabilized Perforated Lamellar Morphology in Block Copolymer/Quantum Dot Hybrids. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02639] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sajan Singh
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany
| | - Andriy Horechyy
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany
| | - Sushma Yadav
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Petr Formanek
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany
| | - René Hübner
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - Rajiv K. Srivastava
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sameer Sapra
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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15
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Raulo A, Gupta A, Srivastava R, Nandan B. Cotton cloth templated in situ encapsulation of sulfur into carbon fibers for lithium-sulfur batteries. Chem Commun (Camb) 2021; 57:544-547. [PMID: 33336658 DOI: 10.1039/d0cc06643e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An in situ encapsulation strategy for embedding sulfur within carbon (S@C) fiber through a sustainable and scalable route using waste cotton cloth as a fiber template, is developed. The S@C fibers with reasonably high sulfur content of ∼71% displayed promising electrochemical performance when employed as a cathode material for a lithium sulfur battery (LSB). The S@C fibers developed herein have the potential to be used as a promising cathode material for other sulfur-based batteries as well.
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Affiliation(s)
- Avinash Raulo
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India.
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16
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Raulo A, Gupta A, Srivastava R, Nandan B. Excellent electrochemical performance of Lithium-sulfur batteries via self-standing cathode from interwoven α-Fe2O3 integrated carbon nanofiber networks. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114829] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Samanta P, Srivastava R, Nandan B. Fabrication and crystallization behavior of hollow poly(
l
‐lactic acid) nanofibers. Polymer Crystallization 2020. [DOI: 10.1002/pcr2.10147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pratick Samanta
- Department of Textile Technology Indian Institute of Technology Delhi New Delhi India
- Department of Fiber and Polymer Technology KTH Royal Institute of Technology Stockholm Sweden
| | - Rajiv Srivastava
- Department of Textile Technology Indian Institute of Technology Delhi New Delhi India
| | - Bhanu Nandan
- Department of Textile Technology Indian Institute of Technology Delhi New Delhi India
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18
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Gurave PM, Singh S, Yadav A, Nandan B, Srivastava RK. Electrospinning of a Near Gel Resin To Produce Cross-Linked Fibrous Matrices. Langmuir 2020; 36:2419-2426. [PMID: 32052968 DOI: 10.1021/acs.langmuir.9b03870] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Electrospun fibers and matrices have been researched for their utility in various fields; however, because of poor mechanical strength and loss of structural integrity, their commercial viability is limited. A near gel resin (nGR) of polystyrene (PS) was used in the present approach to fabricate cross-linked fibrous matrices of better mechanical strength and oil adsorption while retaining the structural integrity. Electrospinnability of nGR was assessed in bulk (i.e., in styrene monomer) and solution (i.e., in dimethyl formamide) forms with variations in formulation and electrospinning conditions. Ultimately, a uniform cross-linked fibrous matrix of PS was prepared using an oil-in-water emulsion, where the oil phase composed of a monomer (styrene), an initiator (benzoyl peroxide), and a cross-linker (divinylbenzene) was dispersed in a continuous phase of aqueous poly(vinyl alcohol) (PVA). The monomer conversion in the oil phase was carried out below the gel point, and the nGR of PS formed in dispersed droplets was electrospun to fabricate uniform fibrous matrices with the help of a template polymer, that is, PVA. The effect of various material and process parameters on the gelation behavior, electrospinnability, and fiber uniformity was studied and optimized to produce uniform core-sheath fibrous matrices of cross-linked PS. Postelectrospinning heat treatment of matrices was carried out to achieve complete monomer conversion and cross-linking. Fiber formation behavior of the emulsion was assessed using ionic and nonionic surfactants. The cross-link density of the matrices was optimized to achieve the desired structural morphology and dimensional stability. The process of fabrication of emulsion electrospun cross-linked fibers can be further extended to a variety of other monomers in order to enhance the suitability of fibrous matrices for many applications.
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Affiliation(s)
- Pramod M Gurave
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Shweta Singh
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Anilkumar Yadav
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Rajiv K Srivastava
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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19
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Agrawal M, Yadav A, Nandan B, Srivastava RK. Facile synthesis of templated macrocellular nanocomposite scaffold via emulsifier-free HIPE-ROP. Chem Commun (Camb) 2020; 56:12604-12607. [DOI: 10.1039/d0cc05331g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
High internal phase emulsion (HIPE)-templated macrocellular nanocomposite scaffolds of crosslinked poly(ε-caprolactone) were produced using an emulsifier-free, single-step synthesis and showed superior resiliency and sorption capacity.
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Affiliation(s)
- Meenal Agrawal
- Department of Textile and Fibre Engineering
- Indian Institute of Technology Delhi
- Hauz Khas
- New Delhi
- India
| | - Anilkumar Yadav
- Department of Textile and Fibre Engineering
- Indian Institute of Technology Delhi
- Hauz Khas
- New Delhi
- India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering
- Indian Institute of Technology Delhi
- Hauz Khas
- New Delhi
- India
| | - Rajiv K. Srivastava
- Department of Textile and Fibre Engineering
- Indian Institute of Technology Delhi
- Hauz Khas
- New Delhi
- India
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20
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Kumar L, Singh S, Horechyy A, Formanek P, Hübner R, Albrecht V, Weißpflog J, Schwarz S, Puneet P, Nandan B. Hollow Au@TiO2 porous electrospun nanofibers for catalytic applications. RSC Adv 2020; 10:6592-6602. [PMID: 35495995 PMCID: PMC9049786 DOI: 10.1039/c9ra10487a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 01/29/2020] [Indexed: 01/19/2023] Open
Abstract
Catalytically active porous and hollow titania nanofibers encapsulating gold nanoparticles were fabricated using a combination of sol–gel chemistry and coaxial electrospinning technique. We report the fabrication of catalytically active porous and hollow titania nanofibers encapsulating gold nanoparticles (AuNPs) using a combination of sol–gel chemistry and coaxial electrospinning technique. The coaxial electrospinning involved the use of a mixture of poly(vinyl pyrrolidone) (PVP) and titania sol as the shell forming component, whereas a mixture of poly(4-vinyl pyridine) (P4VP) and pre-synthesized AuNPs constituted the core forming component. The core–shell nanofibers were calcined stepwise up to 600 °C which resulted in decomposition and removal of the organic constituents of the nanofibers. This led to the formation of porous and hollow titania nanofibers, where the catalytic AuNPs were embedded in the inner wall of the titania shell. The catalytic activity of the prepared Au@TiO2 porous nanofibers was investigated using a model reaction of catalytic reduction of 4-nitrophenol and Congo red dye in the presence of NaBH4. The Au@TiO2 porous and hollow nanofibers exhibited excellent catalytic activity and recyclability, and the morphology of the nanofibers remained intact after repeated usage. The presented approach could be a promising route for immobilizing various nanosized catalysts in hollow titania supports for the design of stable catalytic systems where the added photocatalytic activity of titania could further be of significance. Catalytically active porous and hollow titania nanofibers encapsulating gold nanoparticles were fabricated using a combination of sol–gel chemistry and coaxial electrospinning technique.![]()
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Affiliation(s)
- Labeesh Kumar
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Sajan Singh
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Andriy Horechyy
- Leibniz-Institut für Polymerforschung Dresden e.V
- Dresden 01069
- Germany
| | - Petr Formanek
- Leibniz-Institut für Polymerforschung Dresden e.V
- Dresden 01069
- Germany
| | - René Hübner
- Institute of Ion Beam Physics and Materials Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden
- Germany
| | - Victoria Albrecht
- Leibniz-Institut für Polymerforschung Dresden e.V
- Dresden 01069
- Germany
| | - Janek Weißpflog
- Leibniz-Institut für Polymerforschung Dresden e.V
- Dresden 01069
- Germany
| | - Simona Schwarz
- Leibniz-Institut für Polymerforschung Dresden e.V
- Dresden 01069
- Germany
| | - Puhup Puneet
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Bhanu Nandan
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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Yadav A, Erdal NB, Hakkarainen M, Nandan B, Srivastava RK. Cellulose-Derived Nanographene Oxide Reinforced Macroporous Scaffolds of High Internal Phase Emulsion-Templated Cross-Linked Poly(ε-caprolactone). Biomacromolecules 2019; 21:589-596. [DOI: 10.1021/acs.biomac.9b01330] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Anilkumar Yadav
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi Hauz Khas, New Delhi 110016, India
| | - Nejla B. Erdal
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi Hauz Khas, New Delhi 110016, India
| | - Rajiv K. Srivastava
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi Hauz Khas, New Delhi 110016, India
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22
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Yadav A, Pal J, Nandan B, Srivastava RK. Macroporous scaffolds of cross-linked Poly(ɛ-caprolactone) via high internal phase emulsion templating. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.05.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Singh S, Singh A, Mittal M, Srivastava R, Sapra S, Nandan B. Fluorescence resonance energy transfer in multifunctional nanofibers designed via block copolymer self-assembly. Phys Chem Chem Phys 2019; 21:16137-16146. [PMID: 31292581 DOI: 10.1039/c9cp03349a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the present study, we demonstrate the fabrication of multifunctional nanofibers, loaded with CdSe quantum dots (QDs) and sulforhodamine 101 (S101) dye, via the self-assembly process of a polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) block copolymer (BCP). The CdSe QDs and S101 dye were simultaneously incorporated in the cylindrical domains, constituted of P4VP blocks, of the self-assembled BCP structure. The cylindrical domains subsequently were isolated as individual nanofibers via the selective-swelling approach. The confinement imposed due to the nano-dimension geometry of the cylindrical domains enabled the QDs and S101 dye to localize within their Förster radius enabling an efficient fluorescence resonance energy transfer (FRET) between them. The mean lifetime of donor emission varied from 4.56 to 3.38 ns with the change in the ratio of S101 dye and CdSe QDs within the nanofibers. Furthermore, using efficiency measurements and the corresponding Förster distances, donor-acceptor distances were determined. Moreover, the kinetics of energy transfer from CdSe QDs to S101 was studied by the Poisson binding model, to understand the interactions between CdSe QDs and S101 dye molecules. The numbers of dye molecules per CdSe QD were determined, by assuming random distribution of S101 dye molecules around the CdSe QDs in the nanofibers. The results showed that the number of dye molecules per QD increased with increasing concentration of dye molecules in the nanofibers. The resulting multifunctional nanofibers could have potential applications in optoelectronics, photonics and sensors which utilize the FRET process.
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Affiliation(s)
- Sajan Singh
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Ajeet Singh
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Mona Mittal
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Rajiv Srivastava
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Sameer Sapra
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Bhanu Nandan
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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Puneet P, Horechyy A, Srivastava RK, Nandan B, Fujiki M. Photoluminescent poly(4-vinylpyridine)-based ionic liquids coded with l- and d-histidine: a supramolecular self-assembly leading to the formation of red-shifted photoluminescent helical aggregates. Polym Chem 2019. [DOI: 10.1039/c9py00181f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Herein, photoluminescent poly(4-vinylpyridine)-based ionic liquids including d- and l-histidine were synthesized. The chiral PILs self-assembled into helical aggregates.
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Affiliation(s)
- Puhup Puneet
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi
- India
| | - Andriy Horechyy
- Department of Nanostructured Materials
- Leibniz Institute for Polymer Research
- Dresden
- Germany
| | - Rajiiv K. Srivastava
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi
- India
| | - Bhanu Nandan
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi
- India
| | - Michiya Fujiki
- Division of Materials Science
- Nara Advanced Institute of Technology
- Nara
- Japan
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25
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Malpani D, Majumder A, Samanta P, Srivastava RK, Nandan B. Supramolecular Route for Enhancing Polymer Electrospinnability. ACS Omega 2018; 3:15666-15678. [PMID: 31458222 PMCID: PMC6643600 DOI: 10.1021/acsomega.8b02029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 10/29/2018] [Indexed: 06/10/2023]
Abstract
Electrospinning of polymers typically requires high solution concentrations necessitated by the requirement of sufficient chain overlaps to achieve the required viscoelastic properties. Here, we report on a novel supramolecular approach, involving polymer/surfactant complexes, which allows for a significant reduction in the solution concentration of polymer for electrospinning. The approach involved supramolecular complexation of poly(4-vinylpyridine) (P4VP) with a surfactant, dodecylbenzenesulfonic acid (DBSA), via ionic interactions. The supramolecular complexation of P4VP with DBSA led to a significant increase in the solution viscosity even at a DBSA/4VP molar ratio as low as 0.05. Furthermore, the solution viscosity of the P4VP/DBSA complex increased significantly with the DBSA/4VP molar ratio. The increase in the viscosity for the P4VP/DBSA complexes was plausibly due to the formation of physical cross-links between P4VP chains driven by hydrophobic interactions between the surfactant tails. The formation of such physical cross-links led to a significant decrease in the solution concentration needed for the onset of semidilute entangled regime. Thus, the P4VP/DBSA complexes could be electrospun at a much lower concentration. The critical solution concentration to obtain bead-free uniform nanofibers of P4VP/DBSA complexes in dimethylformamide was reduced to 12% (w/v), which was not possible for neat P4VP solution even up to approximately 35% (w/v). Furthermore, small-angle X-ray scattering and polarized optical microscopy results revealed that the electrospun nanofibers of P4VP/DBSA complexes self-assembled in lamellar mesomorphic structures similar to that observed in bulk. However, the electrospun nanofibers exhibited significantly improved lamellar order, which was plausibly facilitated by the preferred orientation of P4VP chains along the fiber axis.
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Samanta P, Srivastava R, Nandan B. Confinement‐driven cocrystallization of binary polymer mixtures of different chain length in electrospun nanofibers. Polymer Crystallization 2018. [DOI: 10.1002/pcr2.10017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Pratick Samanta
- Department of Textile TechnologyIndian Institute of Technology Delhi New Delhi Delhi India
| | - Rajiv Srivastava
- Department of Textile TechnologyIndian Institute of Technology Delhi New Delhi Delhi India
| | - Bhanu Nandan
- Department of Textile TechnologyIndian Institute of Technology Delhi New Delhi Delhi India
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Samanta P, Srivastava R, Nandan B. Block copolymer compatibilization driven frustrated crystallization in electrospun nanofibers of polystyrene/poly(ethylene oxide) blends. RSC Adv 2018; 8:17989-18007. [PMID: 35542103 PMCID: PMC9080552 DOI: 10.1039/c8ra02391c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 05/08/2018] [Indexed: 11/21/2022] Open
Abstract
The confined crystallization behaviour of poly(ethylene oxide) (PEO) has been studied in electrospun nanofibers of the phase-separated blends of polystyrene (PS) and PEO compatibilized with polystyrene-block-poly(ethylene oxide) (PS-b-PEO) block copolymer. The PS was present as the majority component such that the electrospun nanofibers consisted of PEO domains dispersed in the PS matrix. The phase separation in the blend occurred under the radial constraint of the nanofibers which led to the formation of small-sized fibrillar PEO domains. The use of block copolymer compatibilizer resulted in a noticeable decrease in the PEO domain size in the as-spun nanofibers. Moreover, the decrease in the domain size and domain connectivity was more substantial in the thermally annealed blend nanofibers due to the suppression of the domain coalescence mechanism resulting from the localization of the PS-b-PEO block copolymer at the interface. Consequently, the fraction of PEO domains crystallizing via homogeneous nucleation increased in the compatibilized blend nanofibers due to the presence of higher number of heterogeneity free PEO domains and disruption in their spatial connectivity. Interestingly, in the compatibilized blend nanofibers consisting of low molecular weight PEO, additional crystallization event attributed to surface nucleation was observed. The surface nucleation, plausibly, resulted from the formation of wet-brush structures where the PEO homopolymers homogeneously wet the PEO blocks present at the interface. In such a scenario, the PEO crystallization occurred via surface nucleation at the domain interface. The surface nucleated crystallization was absent in the compatibilized blend nanofibers composed of high molecular weight PEO presumably due to the formation of morphology with dry-brush structures. Confined crystallization behaviour of poly(ethylene oxide) (PEO) was studied in electrospun nanofibers of the phase-separated blends of polystyrene (PS) and PEO compatibilized with polystyrene-block-poly(ethylene oxide) (PS-b-PEO) block copolymer.![]()
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Affiliation(s)
- Pratick Samanta
- Department of Textile Technology, Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
| | - Rajiv Srivastava
- Department of Textile Technology, Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
| | - Bhanu Nandan
- Department of Textile Technology, Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
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Nandan B. Nanostructures from self-assembled block copolymer/nanoparticle mixtures. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s2053273317082249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Samanta A, Takkar S, Kulshreshtha R, Nandan B, Srivastava RK. Hydroxyapatite stabilized pickering emulsions of poly(ε-caprolactone) and their composite electrospun scaffolds. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Agarwal S, Hashmi S, Nandan B, Patra AK, Singh RP, Chelvane JA, Khatri MS. Structure and magnetic properties of electrodeposited CoPtP/Pt multilayer nanowires. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.07.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Samanta A, Takkar S, Kulshreshtha R, Nandan B, Srivastava RK. Facile Fabrication of Composite Electrospun Nanofibrous Matrices of Poly(ε-caprolactone)-Silica Based Pickering Emulsion. Langmuir 2017; 33:8062-8069. [PMID: 28735544 DOI: 10.1021/acs.langmuir.7b02119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Functionalized matrices have been sought for their application in sensors, filtration, energy storage, catalysis, and tissue engineering. We report formation of an inorganic-organic composite matrix based on poly(ε-caprolactone) (PCL) functionalized with hydrophobically modified silica (m-silica) fabricated with reduced organic solvent usage. The matrix was obtained via electrospinning of a water-in-oil emulsion of PCL that was stabilized by judicious choice of m-silica as a Pickering agent resulting into an emulsifier free matrix. Inclusion of m-silica in PCL matrix resulted in enhancing tensile properties and cell proliferation efficiency. The electrospun composite matrix was free from any emulsifier or template polymer; thus any abrupt loss in mechanical properties was prevented when the matrix was subjected to aqueous conditions. The inorganic-organic biodegradable composite matrices thus produced using an emulsifier free emulsion find applications in tissue engineering and may further be evaluated for other areas including selective sorption and separation.
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Affiliation(s)
- Archana Samanta
- Department of Textile Technology, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Sonam Takkar
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Ritu Kulshreshtha
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Bhanu Nandan
- Department of Textile Technology, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Rajiv K Srivastava
- Department of Textile Technology, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
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Samanta A, Takkar S, Kulshreshtha R, Nandan B, Srivastava RK. Nano-silver stabilized Pickering emulsions and their antimicrobial electrospun fibrous matrices. Biomed Phys Eng Express 2017. [DOI: 10.1088/2057-1976/aa6c32] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Samanta P, Srivastava R, Nandan B, Chen HL. Crystallization behavior of crystalline/crystalline polymer blends under confinement in electrospun nanofibers of polystyrene/poly(ethylene oxide)/poly(ε-caprolactone) ternary mixtures. Soft Matter 2017; 13:1569-1582. [PMID: 28127604 DOI: 10.1039/c6sm02748b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We have studied the crystallization behavior of crystalline/crystalline blends of poly(ethylene oxide) (PEO) and poly(ε-caprolactone) (PCL) in electrospun nanofibers fabricated from ternary blends of polystyrene (PS), PEO, and PCL, where PS was present as the majority component. It was demonstrated previously that PEO in PS/PEO binary blend nanofibers with a low PEO weight fraction (≦0.2) crystallized predominantly through homogenous nucleation due to the small PEO domain size which excluded the presence of heterogeneities (Soft Matter, 2016, 12, 5110). Here, it was found that PCL in PS/PCL binary blend nanofibers exhibited similar behavior, but at a much lower weight fraction of PCL (≦0.1) due to the presence of an inherently higher concentration of heterogeneities in the PCL homopolymer. In the PS/PEO/PCL ternary blend nanofibers, where the combined weight fraction of PEO and PCL was kept at 0.2 or less, the crystallization of the two components took place separately through both heterogeneous and homogenous nucleation mechanisms. The phase segregated crystallization behavior was further confirmed by the melting behavior of the blend nanofibers and wide angle X-ray diffraction (WAXD) measurements. Most significantly, the homogenous nucleation of both PEO and PCL was suppressed whereas the heterogeneous nucleation was enhanced in the ternary blend nanofibers even at very low weight fraction of PEO or PCL. This was plausibly attributed to the coupling between the crystallization and the liquid-liquid phase separation (LLPS) of the PEO/PCL mixture dispersed in the PS matrix during non-isothermal cooling of the blend nanofibers. Furthermore, it was observed that thermal treatment of the PS/PEO/PCL blend nanofibers above the glass transition temperature of PS further promoted the heterogeneous nucleation-initiated crystallization of PEO because of a complex interplay between Plateau-Rayleigh instability-induced domain breakup and its further coalescence and demixing within the PEO/PCL domains embedded in the PS matrix.
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Affiliation(s)
- Pratick Samanta
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Rajiv Srivastava
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Bhanu Nandan
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Hsin-Lung Chen
- Department of Chemical Engineering and Frontier Centre of Fundamental and Applied Sciences of Matters, National Tsing-Hua University, Hsinchu 30013, Taiwan.
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Singh S, Samanta P, Srivastava R, Horechyy A, Reuter U, Stamm M, Chen HL, Nandan B. Ligand displacement induced morphologies in block copolymer/quantum dot hybrids and formation of core–shell hybrid nanoobjects. Phys Chem Chem Phys 2017; 19:27651-27663. [DOI: 10.1039/c7cp04343k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This article reports on the ligand displacement induced morphologies in block copolymer/quantum dot hybrids and further formation of core–shell nano-objects from them.
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Affiliation(s)
- Sajan Singh
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Pratick Samanta
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Rajiv Srivastava
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Andriy Horechyy
- Leibniz Institute of Polymer Research Dresden
- Dresden 01069
- Germany
| | - Uta Reuter
- Leibniz Institute of Polymer Research Dresden
- Dresden 01069
- Germany
| | - Manfred Stamm
- Leibniz Institute of Polymer Research Dresden
- Dresden 01069
- Germany
- Technische Universität Dresden
- Physical Chemistry of Polymer Materials
| | - Hsin-Lung Chen
- Department of Chemical Engineering
- National Tsing-Hua University
- Hsinchu 30013
- Taiwan
| | - Bhanu Nandan
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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Shajkumar A, Nandan B, Sanwaria S, Albrecht V, Libera M, Lee MH, Auffermann G, Stamm M, Horechyy A. Silica-supported Au@hollow-SiO 2 particles with outstanding catalytic activity prepared via block copolymer template approach. J Colloid Interface Sci 2016; 491:246-254. [PMID: 28039806 DOI: 10.1016/j.jcis.2016.12.051] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 12/14/2016] [Accepted: 12/19/2016] [Indexed: 12/31/2022]
Abstract
Catalytically active Au@hollow-SiO2 particles embedded in porous silica support (Au@hollow-SiO2@PSS) were prepared by using spherical micelles from poly(styrene)-block-poly(4-vinyl pyridine) block copolymer as a sacrificial template. Drastic increase of the shell porosity was observed after pyrolytic removal of polymeric template because the stretched poly(4-vinyl pyridine) chains interpenetrating with silica shell acted as an effective porogen. The embedding of Au@hollow-SiO2 particles in porous silica support prevented their fusion during pyrolysis. The catalytic activity of Au@hollow-SiO2@PSS was investigated using a model reaction of catalytic reduction of 4-nitrophenol and reductive degradation of Congo red azo-dye. Significantly, to the best of our knowledge, Au@hollow-SiO2@PSS catalyst shows the highest activity among analogous systems reported till now in literature. Such high activity was attributed to the presence of multiple pores within silica shell of Au@hollow-SiO2 particles and easy accessibility of reagents to the catalytically active sites of the ligand-free gold surface through the porous silica support.
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Affiliation(s)
- Aruni Shajkumar
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany
| | - Bhanu Nandan
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Sunita Sanwaria
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Victoria Albrecht
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany
| | - Marcin Libera
- Center of Polymer and Carbon Materials, Polish Academy of Science, M. Curie-Sklodowskej 34, 41-819 Zabrze, Poland
| | - Myong-Hoon Lee
- The Graduate School of Flexible and Printable Electronics, Center for Polymer Fusion Technology, Chonbuk National University, Jeonju, Chonbuk 561-756, South Korea
| | - Gudrun Auffermann
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straβe 40, D-01187 Dresden, Germany
| | - Manfred Stamm
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany; Technische Universität Dresden, Physical Chemistry of Polymer Materials, Dresden 01062, Germany.
| | - Andriy Horechyy
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany.
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Horechyy A, Nandan B, Shajkumar A, Formanek P, Paturej J, Stamm M, Fery A. In-situ monitoring of silica shell growth on PS-b-P4VP micelles as templates using DLS. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.07.080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Samanta A, Takkar S, Kulshreshtha R, Nandan B, Srivastava RK. Electrospun composite matrices of poly(ε-caprolactone)-montmorillonite made using tenside free Pickering emulsions. Materials Science and Engineering: C 2016; 69:685-91. [DOI: 10.1016/j.msec.2016.07.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 07/01/2016] [Accepted: 07/19/2016] [Indexed: 10/21/2022]
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Samanta P, V T, Singh S, Srivastava R, Nandan B, Liu CL, Chen HL. Crystallization behaviour of poly(ethylene oxide) under confinement in the electrospun nanofibers of polystyrene/poly(ethylene oxide) blends. Soft Matter 2016; 12:5110-5120. [PMID: 27184694 DOI: 10.1039/c6sm00648e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We have studied the confined crystallization behaviour of poly(ethylene oxide) (PEO) in the electrospun nanofibers of the phase-separated blends of polystyrene (PS) and PEO, where PS was present as the major component. The size and shape of PEO domains in the nanofibers were considerably different from those in the cast films, presumably because of the nano-dimensions of the nanofibers and the extensional forces experienced by the polymer solution during electrospinning. The phase-separated morphology in turn influenced the crystallization behaviour of PEO in the blend nanofibers. At a PEO weight fraction of ≥0.3, crystallization occurred through a heterogeneous nucleation mechanism similar to that in cast blend films. However, as the PEO weight fraction in the blend nanofibers was reduced from 0.3 to 0.2, an abrupt transformation of the nucleation mechanism from the heterogeneous to predominantly homogenous type was observed. The change in the nucleation mechanism implied a drastic reduction of the spatial continuity of PEO domains in the nanofibers, which was not encountered in the cast film. The melting temperature and crystallinity of the PEO crystallites developed in the nanofibers were also significantly lower than those in the corresponding cast films. The phenomena observed were reconciled by the morphological observation, which revealed that the phase separation under the radial constraint of the nanofibers led to the formation of small-sized fibrillar PEO domains with limited spatial connectivity. The thermal treatment of the PS/PEO blend nanofibers above the glass transition temperature of PS induced an even stronger confinement effect on PEO crystallization.
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Affiliation(s)
- Pratick Samanta
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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Sharma E, Samanta A, Pal J, Bahga SS, Nandan B, Srivastava RK. High Internal Phase Emulsion Ring-Opening Polymerization of Pentadecanolide: Strategy to Obtain Porous Scaffolds in a Single Step. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600117] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Esha Sharma
- Department of Textile Technology; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110016 India
| | - Archana Samanta
- Department of Textile Technology; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110016 India
| | - Jit Pal
- Department of Textile Technology; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110016 India
| | - Supreet S. Bahga
- Department of Mechanical Engineering; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110016 India
| | - Bhanu Nandan
- Department of Textile Technology; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110016 India
| | - Rajiv K. Srivastava
- Department of Textile Technology; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110016 India
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Samanta A, Nandan B, Srivastava RK. Morphology of electrospun fibers derived from High Internal Phase Emulsions. J Colloid Interface Sci 2016; 471:29-36. [DOI: 10.1016/j.jcis.2016.03.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/07/2016] [Accepted: 03/07/2016] [Indexed: 10/22/2022]
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Bigall NC, Nandan B, Gowd EB, Horechyy A, Eychmüller A. High-Resolution Metal Nanopatterning by Means of Switchable Block Copolymer Templates. ACS Appl Mater Interfaces 2015; 7:12559-12569. [PMID: 25619225 DOI: 10.1021/am507567q] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this review, recent developments in the fabrication of hexagonal and parallel ordered arrays of metallic nanodomains on a substrate are described. We focus on the nanopatterning approach by means of switchable block copolymer thin films. This approach is highly advantageous, because it can lead to extremely regular patterns with metal subunits of only a few nanometers in diameter and center-to-center distances of tens of nanometers. Hence, the resulting 1D or 2D periodic arrays of metal nanodots and nanowires on silicon substrates can be fabricated with extremely high unit densities and on very large areas. The templated deposition of presynthesized metal nanoparticles on functional block copolymers is described in detail. Current challenges are discussed and an outlook for further developments is given.
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Affiliation(s)
- Nadja C Bigall
- †Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, D-30167 Hannover, Germany
| | - Bhanu Nandan
- ‡Department of Textile Technology, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - E Bhoje Gowd
- §Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, Kerala, India
| | - Andriy Horechyy
- ⊥Leibniz Institute of Polymer Research Dresden, Hohe Straße 6, D-01069 Dresden, Germany
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Nandan B, Horechyy A. Hairy Core-Shell Polymer Nano-objects from Self-Assembled Block Copolymer Structures. ACS Appl Mater Interfaces 2015; 7:12539-12558. [PMID: 25603397 DOI: 10.1021/am5075503] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Fabrication of core-shell polymer nano-objects with well-defined shape and hairy shell has been a subject of immense interest in polymer chemistry for more than two decades now. Different approaches such as those involving synthesis (grafting approaches) and block copolymer self-assembly (solution as well as bulk) have been used for the preparation of such nano-objects. Of these approaches that involving bulk self-assembled structures of block copolymers have been of special interest because of the simplicity and range of shape and structures possible. The present review focuses on the advances which have been made in this direction using diblock and triblock self-assembled structures. It will be shown that this approach allows to fabricate hairy nano-objects of not only simple shapes such as spheres, rods, and sheets but also those with more complex shape and morphology such as multicompartment micelles, which are not possible to obtain with synthetic or solution self-assembly approaches. Furthermore, interesting structures such as Janus nano-objects could also be fabricated using this approach. The review further highlights the use of such nano-objects for templating applications.
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Affiliation(s)
- Bhanu Nandan
- †Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Andriy Horechyy
- ‡Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, Dresden 01069, Germany
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Sanwaria S, Singh S, Horechyy A, Formanek P, Stamm M, Srivastava R, Nandan B. Multifunctional core–shell polymer–inorganic hybrid nanofibers prepared via block copolymer self-assembly. RSC Adv 2015. [DOI: 10.1039/c5ra17161j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A simple approach for fabricating multifunctional core–shell nanofibers via self-assembly of block copolymer has been demonstrated. The approach is versatile and could easily be extended to a range of targeted combination of nanoparticles.
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Affiliation(s)
- Sunita Sanwaria
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Sajan Singh
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Andriy Horechyy
- Leibniz-Institut für Polymerforschung Dresden e.V
- 01069 Dresden
- Germany
| | - Petr Formanek
- Leibniz-Institut für Polymerforschung Dresden e.V
- 01069 Dresden
- Germany
| | - Manfred Stamm
- Leibniz-Institut für Polymerforschung Dresden e.V
- 01069 Dresden
- Germany
- Technische Universität Dresden
- Physical Chemistry of Polymer Materials
| | - Rajiv Srivastava
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Bhanu Nandan
- Department of Textile Technology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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Pal J, Sharma S, Sanwaria S, Kulshreshtha R, Nandan B, Srivastava RK. Conducive 3D porous mesh of poly(ε-caprolactone) made via emulsion electrospinning. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.06.067] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Sanwaria S, Horechyy A, Wolf D, Chu CY, Chen HL, Formanek P, Stamm M, Srivastava R, Nandan B. Helical Packing of Nanoparticles Confined in Cylindrical Domains of a Self-Assembled Block Copolymer Structure. Angew Chem Int Ed Engl 2014; 53:9090-3. [DOI: 10.1002/anie.201403565] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Indexed: 11/08/2022]
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Sanwaria S, Horechyy A, Wolf D, Chu CY, Chen HL, Formanek P, Stamm M, Srivastava R, Nandan B. Helixförmige Packung von Nanopartikeln, eingeschlossen in zylindrische Domänen einer selbstorganisierten Blockcopolymerstruktur. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403565] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Horechyy A, Nandan B, Zafeiropoulos NE, Jehnichen D, Göbel M, Stamm M, Pospiech D. Nanoparticle directed domain orientation in thin films of asymmetric block copolymers. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3251-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sanwaria S, Pal J, Srivastava R, Formanek P, Stamm M, Horechyy A, Nandan B. Synthesis of hollow silica nanostructures using functional hairy polymer nanofibers as templates. RSC Adv 2013. [DOI: 10.1039/c3ra42692k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Pal J, Sanwaria S, Srivastava R, Nandan B, Horechyy A, Stamm M, Chen HL. Hairy polymer nanofibers via self-assembly of block copolymers. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm33824f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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