1
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Lin YT, Liu S, Bhat B, Kuan KY, Zhou W, Cobos IJ, Kwon JSI, Akbulut MES. pH- and temperature-responsive supramolecular assemblies with highly adjustable viscoelasticity: a multi-stimuli binary system. SOFT MATTER 2023. [PMID: 37449660 DOI: 10.1039/d3sm00549f] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Stimuli-responsive materials are increasingly needed for the development of smart electronic, mechanical, and biological devices and systems relying on switchable, tunable, and adaptable properties. Herein, we report a novel pH- and temperature-responsive binary supramolecular assembly involving a long-chain hydroxyamino amide (HAA) and an inorganic hydrotrope, boric acid, with highly tunable viscous and viscoelastic properties. The system under investigation demonstrates a high degree of control over its viscosity, with the capacity to achieve over four orders of magnitude of control through the concomitant manipulation of pH and temperature. In addition, the transformation from non-Maxwellian to Maxwellian fluid behavior could also be induced by changing the pH and temperature. Switchable rheological properties were ascribed to the morphological transformation between spherical vesicles, aggregated/fused spherical vesicles, and bicontinuous gyroid structures revealed by cryo-TEM studies. The observed transitions are attributed to the modulation of the head group spacing between HAA molecules under different pH conditions. Specifically, acidic conditions induce electrostatic repulsion between the protonated amino head groups, leading to an increased spacing. Conversely, under basic conditions, the HAA head group spacing is reduced due to the intercalation of tetrahydroxyborate, facilitated by hydrogen bonding.
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Affiliation(s)
- Yu-Ting Lin
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Shuhao Liu
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Bhargavi Bhat
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Kai-Yuan Kuan
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Wentao Zhou
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Ignacio Jose Cobos
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Joseph Sang-Il Kwon
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
- Texas A&M Energy Institute, College Station, TX 77843, USA
| | - Mustafa E S Akbulut
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
- Texas A&M Energy Institute, College Station, TX 77843, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
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2
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Alroaithi M, Xu W. Nanocomposite of CO 2-Based Polycarbonate Polyol with Highly Exfoliated Nanoclay. ACS OMEGA 2023; 8:5247-5256. [PMID: 36816631 PMCID: PMC9933217 DOI: 10.1021/acsomega.2c05705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 12/07/2022] [Indexed: 06/18/2023]
Abstract
Polypropylene carbonate (PPC) derived from carbon dioxide has been used as a precursor for the synthesis of polyurethane (PU). The high viscosity of the PPC is the key parameter hindering its processability during PU synthesis. Herein, a PPC nanocomposite with highly exfoliated nanoclay was prepared through a solution intercalation process. A wide range of nanoclay concentrations incorporated into the PPC were studied. The impacts of the nanoclay on the PPC were investigated in order to maintain the polymer structure while improving its physical properties. The characterizations of PPC nanocomposites showed that the highly exfoliated nanoclay contributed to a viscosity reduction, and a slight reduction in the molecular weight. The polymer degradation was indicated by the formation of cyclic propylene carbonate. The minimum or critical concentration of nanoclay was found to be between ∼0.5 and 2.0 wt %. Within this range, the polymer degradation is minimal. The PPC nanocomposites with a lower viscosity showed excellent precursors for making PU coating materials. The PU coating derived from the PPC nanocomposite has higher anticorrosive properties in comparison with the non-modified PU coating.
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3
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Seraji AA, Goharpey F, Khademzadeh Yeganeh J. Highly crystallized and tough polylactic acid through addition of surface modified cellulose nanocrystals. J Appl Polym Sci 2022. [DOI: 10.1002/app.52871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Amir Abbas Seraji
- Polymer & Color Engineering Department Amirkabir University of Technology Tehran Iran
| | - Fatemeh Goharpey
- Polymer & Color Engineering Department Amirkabir University of Technology Tehran Iran
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4
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Nasrollah Gavgani J, Goharpey F, Velankar S. Interfacially compatibilized PI/PDMS blends with reduced octadecylamine-functionalized graphene oxide: morphological and rheological properties. SOFT MATTER 2021; 17:9670-9681. [PMID: 34633017 DOI: 10.1039/d1sm01057c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We investigate the interfacial compatibilization effect of reduced octadecylamine-functionalized graphene oxide (ODA-GO) on the morphological and rheological properties of immiscible homopolymer blends of polydimethylsiloxane (PDMS) and polyisoprene (PI). We prepared droplet-matrix blends with a PI : PDMS ratio of 30 : 70 or 70 : 30 and interfacially localized ODA-GO stabilizer loadings from 0.1% to 1%. Blends were examined by optical microscopy and rheometry. Both blends show typical droplet-matrix morphology with stabilized round drops that do not stick together. With the addition of ODA-GO, smaller drops were observed in PI-continuous blends as compared to the PDMS-continuous blends suggesting that the effects of particles are not symmetric in the two cases. At sufficiently high ODA-GO loadings, flow-induced coalescence is suppressed almost completely. Dynamic oscillatory rheology broadly confirms the morphological observations. Specifically, all the blends show an interfacial relaxation process that is distinct from the bulk viscoelasticity, and the dependence of this process on GO content and flow conditions confirms the compatibilizing effect of the ODA-GO. This work provides a strategy for interfacially-compatibilizated polymer blends with specific properties for practical applications.
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Affiliation(s)
- Jaber Nasrollah Gavgani
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O.Box-15875-4413, Tehran, Iran.
| | - Fatemeh Goharpey
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O.Box-15875-4413, Tehran, Iran.
| | - Sachin Velankar
- Department of Chemical Engineering, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
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5
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Lohrasbi P, Yeganeh JK. Synergistic toughening of poly(lactic acid)/poly(ethylene vinyl acetate) (
PLA
/
EVA
) by dynamic vulcanization and presence of hydrophobic nanoparticles. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5435] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Pardis Lohrasbi
- Polymer Engineering Department Qom University of Technology Qom Iran
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6
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Muzata TS, L JP, Bose S. Nanoparticles influence miscibility in LCST polymer blends: from fundamental perspective to current applications. Phys Chem Chem Phys 2020; 22:20167-20188. [PMID: 32966418 DOI: 10.1039/d0cp01814g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Polymer blending is an effective method that can be used to fabricate new versatile materials with enhanced properties. The blending of two polymers can result in either a miscible or an immiscible polymer blend system. This present review provides an in-depth summary of the miscibility of LCST polymer blend systems, an area that has garnered much attention in the past few years. The initial discourse of the present review mainly focuses on process-induced changes in the miscibility of polymer blend systems, and how the preparation of polymer blends affects their final properties. This review further highlights how nanoparticles induce miscibility and describes the various methods that can be implemented to avoid nanoparticle aggregation. The concepts and different state-of-the-art experimental methods which can be used to determine miscibility in polymer blends are also highlighted. Lastly, the importance of studying miscible polymer blends is extensively explored by looking at their importance in barrier materials, EMI shielding, corrosion protection, light-emitting diodes, gas separation, and lithium battery applications. The primary goal of this review is to cover the journey from the fundamental aspects of miscible polymer blends to their applications.
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Affiliation(s)
- Tanyaradzwa S Muzata
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
| | - Jagadeshvaran P L
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
| | - Suryasarathi Bose
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
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7
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Shoja M, Mohammadi-Roshandeh J, Hemmati F, Zandi A, Farizeh T. Plasticized starch-based biocomposites containing modified rice straw fillers with thermoplastic, thermoset-like and thermoset chemical structures. Int J Biol Macromol 2020; 157:715-725. [PMID: 31794825 DOI: 10.1016/j.ijbiomac.2019.11.236] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 11/23/2019] [Accepted: 11/29/2019] [Indexed: 11/28/2022]
Abstract
In this work, rice straw (RS) as an abundant biomass was applied to prepare some renewable thermoplastic materials by using soda-pulping and benzylation processes. The obtained RS products including untreated RS, RS pulp, benzylated RS pulp and pulping liquor as well as benzylated RS were incorporated into the thermoplastic starch through a twin-screw extrusion process to obtain all green composites. The successful thermoplasticization reaction of RS products was confirmed by spectroscopy results and morphological observations. The interfacial adhesion between the plasticized starch matrix and the RS products is enhanced by the chemical modifications, which confirmed by investigating through the morphological observations and linear rheological responses. The partial phase miscibility of the plasticizer/starch mixtures is improved by adding the benzylated RS and RS pulp. The RS pulp having cellulosic microfibers enhances the Young modulus and tensile strength of the plasticized starch even more than untreated RS. However, their thermoset and thermoset-like structure leads to the brittle failure mode of the starch biocomposites, similar to the common natural fiber biocomposites. The thermoplasticization reaction changes the failure mode and significantly improves the toughness of the plasticized starch/RS product biocomposites owing to better phase miscibility.
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Affiliation(s)
- Maryam Shoja
- Fouman Faculty of Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | | | - Farkhondeh Hemmati
- Caspian Faculty of Engineering, College of Engineering, University of Tehran, Tehran, Iran.
| | - As'ad Zandi
- Caspian Faculty of Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Tara Farizeh
- Caspian Faculty of Engineering, College of Engineering, University of Tehran, Tehran, Iran
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8
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Yook S, Isik T, Ortalan V, Cakmak M. Anisotropic phase-separated morphology of polymer blends directed by electrically pre-oriented clay platelets. SOFT MATTER 2020; 16:2104-2113. [PMID: 32016253 DOI: 10.1039/c9sm02379h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We describe a general pathway to prepare an anisotropic phase-separated polystyrene (PS) - poly(vinyl methyl ether) (PVME) blend morphology by using electrically pre-orientated clay platelets. The clay platelets were oriented in a PS/PVME blend by means of an externally applied AC electric field while the blend is in one phase. Following orientation step, phase separation of the blends was induced by a temperature jump above their lower critical solution temperature (LCST) in the presence of the oriented clay platelets. In this process, an early stage co-continuous PS/PVME morphology coarsened and turned anisotropic phase-separated morphology parallel to the direction defined by clay planes oriented by AC electric field. The degree of anisotropy of PS/PVME phase-separated morphology was characterized by image analysis and that was found to be linearly proportional to the degree of orientation of clay platelets obtained by a 2D Wide Angle X-ray Scattering (WAXS). Transmission Electron Microscope (TEM) image of the blend morphology revealed that clay platelets oriented to AC field direction were located in a PVME phase. The electrically ordered column structures of clay platelets in the PVME phase yielded anisotropic PS diffusion during the phase separation. This process provides a unique new way to develop directionally organized phase-separated morphology from partially miscible binary blends using nanoparticles in combination with an external electric field.
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Affiliation(s)
- Sungho Yook
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA.
| | - Tugba Isik
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, USA and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Volkan Ortalan
- Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, USA and Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Mukerrem Cakmak
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA.
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9
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10
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Naziri AA, Ehsani M, Khonakdar HA, Hemmati F, Jafari SH. Spherical nanoparticle effects on the lower critical solution temperature phase behavior of poly(ε‐caprolactone)/poly(styrene‐
co
‐acrylonitrile) blends: Separation of thermodynamic aspects from kinetics. J Appl Polym Sci 2019. [DOI: 10.1002/app.48679] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Amir Ali Naziri
- Department of Polymer Engineering, Faculty of Engineering, South Tehran BranchIslamic Azad University P.O. Box 19585‐466 Tehran Iran
| | - Morteza Ehsani
- Department of Polymer ProcessingIran Polymer and Petrochemical Institute P.O. Box 14965‐115 Tehran Iran
| | - Hossein Ali Khonakdar
- Department of Polymer ProcessingIran Polymer and Petrochemical Institute P.O. Box 14965‐115 Tehran Iran
- Leibniz Institute of Polymer Research Dresden HoheStraße 6 Dresden D‐01069 Germany
| | - Farkhondeh Hemmati
- Caspian Faculty of Engineering, College of EngineeringUniversity of Tehran P.O. Box 43841‐119 Guilan Iran
| | - Seyed Hassan Jafari
- School of Chemical Engineering, College of EngineeringUniversity of Tehran P.O. Box 11155‐4563 Tehran Iran
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11
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Zare Y, Rhee KY. Prediction of loss factor (tan δ) for polymer nanocomposites as a function of yield tress, relaxation time and the width of transition region between Newtonian and power-law behaviors. J Mech Behav Biomed Mater 2019; 96:136-143. [DOI: 10.1016/j.jmbbm.2019.04.045] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 04/22/2019] [Accepted: 04/23/2019] [Indexed: 11/29/2022]
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12
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Garcia Garcia C, Kiick KL. Methods for producing microstructured hydrogels for targeted applications in biology. Acta Biomater 2019; 84:34-48. [PMID: 30465923 PMCID: PMC6326863 DOI: 10.1016/j.actbio.2018.11.028] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 11/12/2018] [Accepted: 11/19/2018] [Indexed: 12/29/2022]
Abstract
Hydrogels have been broadly studied for applications in clinically motivated fields such as tissue regeneration, drug delivery, and wound healing, as well as in a wide variety of consumer and industry uses. While the control of mechanical properties and network structures are important in all of these applications, for regenerative medicine applications in particular, matching the chemical, topographical and mechanical properties for the target use/tissue is critical. There have been multiple alternatives developed for fabricating materials with microstructures with goals of controlling the spatial location, phenotypic evolution, and signaling of cells. The commonly employed polymers such as poly(ethylene glycol) (PEG), polypeptides, and polysaccharides (as well as others) can be processed by various methods in order to control material heterogeneity and microscale structures. We review here the more commonly used polymers, chemistries, and methods for generating microstructures in biomaterials, highlighting the range of possible morphologies that can be produced, and the limitations of each method. With a focus in liquid-liquid phase separation, methods and chemistries well suited for stabilizing the interface and arresting the phase separation are covered. As the microstructures can affect cell behavior, examples of such effects are reviewed as well. STATEMENT OF SIGNIFICANCE: Heterogeneous hydrogels with enhanced matrix complexity have been studied for a variety of biomimetic materials. A range of materials based on poly(ethylene glycol), polypeptides, proteins, and/or polysaccharides, have been employed in the studies of materials that by virtue of their microstructure, can control the behaviors of cells. Methods including microfluidics, photolithography, gelation in the presence of porogens, and liquid-liquid phase separation, are presented as possible strategies for producing materials, and their relative advantages and disadvantages are discussed. We also describe in more detail the various processes involved in LLPS, and how they can be manipulated to alter the kinetics of phase separation and to yield different microstructured materials.
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Affiliation(s)
- Cristobal Garcia Garcia
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
| | - Kristi L Kiick
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA; Biomedical Engineering, University of Delaware, Newark, DE 19176, USA; Delaware Biotechnology Institute, Newark, DE 19716, USA
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13
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Zhang J, Zuo M, Lv X, Zhang H, Zheng Q. Effect of grafted graphene nanosheets on morphology evolution and conductive behavior of poly(methyl methacrylate)/poly(styrene- co-acrylonitrile) blends during isothermal annealing. RSC Adv 2018; 8:14579-14588. [PMID: 35540783 PMCID: PMC9079945 DOI: 10.1039/c8ra00439k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 03/31/2018] [Indexed: 12/30/2022] Open
Abstract
A facile method was developed for directly grafting poly(methyl methacrylate) (PMMA) to graphene oxide (GO) without surface modification, with the resultant insulating PMMA-g-GO nanosheets further reduced in situ to give conductive grafted reduced graphene oxide (RGO) nanosheets. The effect of PMMA-g-RGO nanosheets on the morphological evolution and conductive behavior of partially miscible blends of poly(methyl methacrylate)/poly (styrene-co-acrylonitrile) (PMMA/SAN) upon annealing above their phase-separation temperature was investigated using phase-contrast microscopy (PCM) with a real-time online digital picoammeter. With phase separation of the blend matrix, the well-dispersed PMMA-g-RGO nanosheets in the homogeneous matrix preferentially migrated to the SAN-rich phase and showed remarkably little aggregation. Surface grafting of PMMA-g-RGO might inhibit the aggregation of nanosheets in the blend matrix and weaken the retardation effect of nanosheets on the morphology evolution of the blend matrix. Furthermore, the percolation behavior of dynamic resistivity for ternary nanocomposites was attributed to the formation of a PMMA-g-RGO conductive network in the SAN-rich phase. The activation energy of conductive pathway formation was closer to the activation energy of flow for PMMA than that of SAN. The activation energy of conductive pathway formation for PMMA/SAN/PMMA-g-RGO nanocomposites is close to that of flow for PMMA, indicating that DC percolation is mainly related to the mobility of grafted PMMA chains, rather than that of SAN chains.![]()
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Affiliation(s)
- Jifei Zhang
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Min Zuo
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Xiong Lv
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Haimo Zhang
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University Hangzhou 310027 China
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14
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Zhou Y, Huang M, Lu T, Guo H. Nanorods with Different Surface Properties in Directing the Compatibilization Behavior and the Morphological Transition of Immiscible Polymer Blends in Both Shear and Shear-Free Conditions. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02624] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Yongxiang Zhou
- Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Sciences and Materials, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of
Chinese Academy of Sciences, Beijing 100049, China
| | - Manxia Huang
- Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Sciences and Materials, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of
Chinese Academy of Sciences, Beijing 100049, China
| | - Teng Lu
- Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Sciences and Materials, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of
Chinese Academy of Sciences, Beijing 100049, China
| | - Hongxia Guo
- Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Sciences and Materials, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of
Chinese Academy of Sciences, Beijing 100049, China
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15
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Liu D, Li W, Zhang N, Huang T, Yang J, Wang Y. Graphite oxide-driven miscibility in PVDF/PMMA blends: Assessment through dynamic rheology method. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.09.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Chen Q, Zuo M, Song YH, Zheng Q. Molecular dynamics and phase behavior of polystyrene/poly(vinyl methyl ether) blend in the presence of nanosilica. CHINESE JOURNAL OF POLYMER SCIENCE 2017. [DOI: 10.1007/s10118-017-1980-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Sanjari Shahrezaei MA, Goharpey F, Khademzadeh Yeganeh J. Effect of selective localization of cellulose nanowhiskers on viscoelastic phase separation. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24648] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Fatemeh Goharpey
- Department of Polymer Engineering; Amirkabir University of Technology; Tehran Iran
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18
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Yeganeh JK. Dynamics of nucleation and growth mechanism in the presence of nanoparticles or block copolymers: polystyrene/poly(vinyl methyl ether). Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2016-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Zare Y. A comparative study to predict the interphase modulus in polymer nanocomposites. J Appl Polym Sci 2016. [DOI: 10.1002/app.44076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yasser Zare
- Young Researchers and Elites Club; Science and Research Branch; Islamic Azad University; Tehran Iran
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20
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Xavier P, Rao P, Bose S. Nanoparticle induced miscibility in LCST polymer blends: critically assessing the enthalpic and entropic effects. Phys Chem Chem Phys 2016; 18:47-64. [DOI: 10.1039/c5cp05852j] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of polymer blends widened the possibility of creating materials with multilayered architectures.
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Affiliation(s)
- Priti Xavier
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Praveen Rao
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Suryasarathi Bose
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
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21
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Li HH, Zuo M, Liu T, Chen Q, Zhang J, Zheng Q. Effect of multi-walled carbon nanotubes on the morphology evolution, conductivity and rheological behaviors of poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends during isothermal annealing. RSC Adv 2016. [DOI: 10.1039/c5ra23002k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
MWNTs migrate and aggregate in SAN-rich phase to form the double percolated structure with thermal-induced phase separation of blend matrix.
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Affiliation(s)
- Hui-hui Li
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Ministry of Education
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Min Zuo
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Ministry of Education
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Ting Liu
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Ministry of Education
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Qi Chen
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Ministry of Education
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Jifei Zhang
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Ministry of Education
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Ministry of Education
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
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22
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Modeling the strength and thickness of the interphase in polymer nanocomposite reinforced with spherical nanoparticles by a coupling methodology. J Colloid Interface Sci 2015; 465:342-6. [PMID: 26704592 DOI: 10.1016/j.jcis.2015.09.025] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 09/08/2015] [Indexed: 11/20/2022]
Abstract
In this work, the strength (σi) and thickness (t) of interphase in polymer nanocomposites reinforced with spherical nanoparticles are modeled by the developed form of Leidner-Woodhams and Pukanszky models for tensile strength. The "σi" and "t" are expressed as functions of "B" parameter in Pukanszky model and the properties of matrix and nanofiller such as the strength of matrix and the nanoparticles radius and volume fraction. Additionally, the effects of the mentioned parameters on "σi" and "t" are discussed. The calculations show that "B" has dissimilar effects on "σi" and "t" levels. A high level of "B" in Pukanszky model suggests a high level of "σi", while a thin interphase is obtained in this condition. Also, the content of nanoparticles plays different roles in the levels of "σi" and "t" based on the extent of interfacial adhesion between polymer and nanoparticles (B value). The influences of "B" on "t" at different nanofiller contents are described by the possibility of nanoparticles aggregation at various values of "B".
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Xavier P, Bose S. Mapping the intriguing transient morphologies and the demixing behavior in PS/PVME blends in the presence of rod-like nanoparticles. Phys Chem Chem Phys 2015; 17:14972-85. [PMID: 25982342 DOI: 10.1039/c5cp01865j] [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]
Abstract
The demixing behavior, transient morphologies and mechanism of phase separation in PS/PVME blends were greatly altered in the presence of a very low concentration of rod-like particles (multiwall carbon nanotubes, MWNTs). This phenomenon is due to the specific interaction of one of the phases (PVME) with the anisotropic MWNTs, which creates a heterogeneous environment in the blend. This specific interaction alters the chain dynamics in the interfacial region as against the bulk. A comprehensive analysis using isochronal temperature sweep was performed to understand the demixing temperature in the blends. The evolution of phase morphology as a function of time and temperature was assessed by polarizing optical microscopy (POM), atomic force microscopy (AFM) and scanning electron microscopy (SEM). The addition of MWNTs increased the rheological demixing temperature and the spinodal temperature in almost all the compositions. The intriguing transient morphologies were mapped, which varied from nucleation and growth to coalescence-induced viscoelastic phase separation (C-VPS) in PVME-rich blends, to spinodal decomposition in the near-critical compositions, to transient gel-induced VPS (T-VPS) in the PS-rich compositions. Mapping of the morphology development displayed two types of fracture mechanisms: ductile fracture for near-critical compositions and brittle fracture for off-critical composition. The change in the phase separation mechanism in the presence of MWNTs was due to the variation in dynamic asymmetry brought about by these anisotropic particles. All these observations were correlated by POM, SEM and AFM studies. The length of the cooperatively rearranging region (CRR), as evaluated using modulated differential scanning calorimetry (MDSC) measurements, was found to be composition-independent. The observed variation of effective glass transition of PVME (low Tg component) on blending with PS (high Tg component) and by the addition of MWNTs accounts for the dynamic heterogeneity introduced by MWNTs in the system.
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Affiliation(s)
- Priti Xavier
- Department of Materials Engineering, Indian Institute of Science, Bangalore-560012, India.
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Khademzadeh Yeganeh J, Goharpey F, Moghimi E, Petekidis G, Foudazi R. Manipulating the kinetics and mechanism of phase separation in dynamically asymmetric LCST blends by nanoparticles. Phys Chem Chem Phys 2015; 17:27446-61. [DOI: 10.1039/c5cp04042f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The addition of nanoparticles in dynamically asymmetric LCST blends is used to induce the preferred phase-separating morphology by tuning the dynamic asymmetry, and to control the kinetics of phase separation by slowing down (or even arresting) the domain growth.
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Affiliation(s)
| | - F. Goharpey
- Department of Polymer Engineering
- Amirkabir University of Technology
- Tehran
- Iran
| | - E. Moghimi
- IESL-FORTH and Department of Material Science and Technology
- University of Crete
- GR-711 10 Heraklion
- Greece
| | - G. Petekidis
- IESL-FORTH and Department of Material Science and Technology
- University of Crete
- GR-711 10 Heraklion
- Greece
| | - R. Foudazi
- Department of Chemical and Materials Engineering
- New Mexico State University
- Las Cruces
- USA
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