The Experts below are selected from a list of 44121 Experts worldwide ranked by ideXlab platform
Qiangguo Du - One of the best experts on this subject based on the ideXlab platform.
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a novel type of shape memory Polymer Blend and the shape memory mechanism
Polymer, 2009Co-Authors: Heng Zhang, Haitao Wang, Wei Zhong, Qiangguo DuAbstract:Abstract A novel styrene–butadiene–styrene tri-block coPolymer (SBS) and poly(ɛ-caprolactone) (PCL) Blend were introduced for its shape memory properties. Compared to the reported shape memory Polymers (SMPs), this novel elastomer and switch Polymer Blend not only simplified the fabrication process but also offer a controllable approach for the study of mechanisms and the optimization of shape memory performances. Microstructures of this Blend were characterized by differential scanning calorimetry (DSC), AFM microscope observation and tensile test. DSC results demonstrated the immiscibility between SBS and PCL. AFM images and stress–strain plot further confirmed the two-phase morphology within the Blend. It was found that the SBS and PCL continuous phases contributed to the shape recovery and shape fixing performances, respectively. A detailed shape memory mechanism for this type of SMP system was then concluded and an optimized SMP system with both good recovery and fixing performances was designed from this mechanism.
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A novel type of shape memory Polymer Blend and the shape memory mechanism
Polymer, 2009Co-Authors: Heng Zhang, Haitao Wang, Wei Zhong, Qiangguo DuAbstract:A novel styrene-butadiene-styrene tri-block coPolymer (SBS) and poly(??-caprolactone) (PCL) Blend were introduced for its shape memory properties. Compared to the reported shape memory Polymers (SMPs), this novel elastomer and switch Polymer Blend not only simplified the fabrication process but also offer a controllable approach for the study of mechanisms and the optimization of shape memory performances. Microstructures of this Blend were characterized by differential scanning calorimetry (DSC), AFM microscope observation and tensile test. DSC results demonstrated the immiscibility between SBS and PCL. AFM images and stress-strain plot further confirmed the two-phase morphology within the Blend. It was found that the SBS and PCL continuous phases contributed to the shape recovery and shape fixing performances, respectively. A detailed shape memory mechanism for this type of SMP system was then concluded and an optimized SMP system with both good recovery and fixing performances was designed from this mechanism. ?? 2009 Elsevier Ltd. All rights reserved.
Heng Zhang - One of the best experts on this subject based on the ideXlab platform.
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a novel type of shape memory Polymer Blend and the shape memory mechanism
Polymer, 2009Co-Authors: Heng Zhang, Haitao Wang, Wei Zhong, Qiangguo DuAbstract:Abstract A novel styrene–butadiene–styrene tri-block coPolymer (SBS) and poly(ɛ-caprolactone) (PCL) Blend were introduced for its shape memory properties. Compared to the reported shape memory Polymers (SMPs), this novel elastomer and switch Polymer Blend not only simplified the fabrication process but also offer a controllable approach for the study of mechanisms and the optimization of shape memory performances. Microstructures of this Blend were characterized by differential scanning calorimetry (DSC), AFM microscope observation and tensile test. DSC results demonstrated the immiscibility between SBS and PCL. AFM images and stress–strain plot further confirmed the two-phase morphology within the Blend. It was found that the SBS and PCL continuous phases contributed to the shape recovery and shape fixing performances, respectively. A detailed shape memory mechanism for this type of SMP system was then concluded and an optimized SMP system with both good recovery and fixing performances was designed from this mechanism.
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A novel type of shape memory Polymer Blend and the shape memory mechanism
Polymer, 2009Co-Authors: Heng Zhang, Haitao Wang, Wei Zhong, Qiangguo DuAbstract:A novel styrene-butadiene-styrene tri-block coPolymer (SBS) and poly(??-caprolactone) (PCL) Blend were introduced for its shape memory properties. Compared to the reported shape memory Polymers (SMPs), this novel elastomer and switch Polymer Blend not only simplified the fabrication process but also offer a controllable approach for the study of mechanisms and the optimization of shape memory performances. Microstructures of this Blend were characterized by differential scanning calorimetry (DSC), AFM microscope observation and tensile test. DSC results demonstrated the immiscibility between SBS and PCL. AFM images and stress-strain plot further confirmed the two-phase morphology within the Blend. It was found that the SBS and PCL continuous phases contributed to the shape recovery and shape fixing performances, respectively. A detailed shape memory mechanism for this type of SMP system was then concluded and an optimized SMP system with both good recovery and fixing performances was designed from this mechanism. ?? 2009 Elsevier Ltd. All rights reserved.
Shujahadeen B. Aziz - One of the best experts on this subject based on the ideXlab platform.
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Electrochemical characteristics of solid state double-layer capacitor constructed from proton conducting chitosan-based Polymer Blend electrolytes
Polymer Bulletin, 2020Co-Authors: Shujahadeen B. Aziz, M F Z Kadir, M. A. Brza, H. M. Hamsan, Rebar T. AbdulwahidAbstract:This research is about the preparation of Polymer Blend electrolytes based on chitosan using solution cast technique. Field emission scanning electron microscopy and Fourier transform infrared spectroscopy (FTIR) routes were utilized for studying morphological and structural properties, respectively. Electrical impedance spectroscopy (EIS) was engaged for determining the direct current electrical conductivity of the films. The ion association at the highest salt concentration was actually present as confirmed by EIS and FTIR achievements. The sample surface displays the protrude salts at the highest salt concentration. Proton conducting Polymer electrolyte with NH_4Br as H^+ (proton) provider has been used in electric double-layer capacitor (EDLC) applications. The highest conducting sample was used to fabricate EDLC. The transference number measurement indicated that the sample is mostly includes ion charge carriers which are vital for application in electrochemical devices. The linear sweep voltammetry study revealed that the decomposition of the sample takes place above 1.54 V. The fabricated EDLC device was performed capacitive behavior, as it can be seen from the cyclic voltammetry (CV) plot. Since no redox peaks have appeared, it can be concluded that the EDLC did not undergo either oxidation or reduction. The acquired value of specific capacitance (132.5 Fg^−1) is considered to be of great interest from the application viewpoints.
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Study of impedance and solid-state double-layer capacitor behavior of proton (H^+)-conducting Polymer Blend electrolyte-based CS:PS Polymers
Ionics, 2020Co-Authors: Shujahadeen B. Aziz, M H Hamsan, M F Z Kadir, Rebar T. Abdulwahid, Aeyub Shahab Marif, Wrya O. Karim, M. A. BrzaAbstract:A series of proton-conducting Polymer Blend electrolytes (PBEs) were prepared using solution casting techniques. Chitosan (CS) and starch of potato (PS) were Blended and doped with various amounts of ammonium fluoride (NH_4F). The highest DC conductivity was found to be 1.38 × 10^−3 S/cm for the sample incorporated with 40 wt.% NH_4F salt using electrical impedance spectroscopy (EIS). A good complex formation between the Polymer Blends and the doped salt was confirmed from the morphology of the sample’s surface using field emission scanning electron microscope (FESEM). The crystalline peak broadening and intensity reduction of CS:PS Polymer Blend with the increasing salt concentration was observed in the X-ray diffraction (XRD) analysis. The type of charge carrier in the PBEs was examined via transference number measurements (TNM), and the dominancy of ion was approved. The extent of electrochemical stability of electrolyte was determined to be up to 1.78 V using linear sweep voltammetry (LSV). The specific capacitance of 6.85 F/g was obtained from cyclic voltammetry (CV) measurement. The rechargeability of the electric double-layer capacitor (EDLC) exhibited stability up to 100 cycles with average specific capacitance of 4.1 F/g. Three criteria were determined, which are internal resistance, energy density, and power density (550 Ω, 0.57 Wh/kg, and 155 W/kg, respectively) of the EDLC at the first cycle.
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Protonic EDLC cell based on chitosan (CS): methylcellulose (MC) solid Polymer Blend electrolytes
Ionics, 2020Co-Authors: Shujahadeen B. Aziz, M H Hamsan, Ranjdar M. Abdullah, Rebar T. Abdulwahid, M. A. Brza, Aeyub Shahab Marif, M F Z KadirAbstract:In this work, preparation and application of solid Polymer Blend electrolytes (SPBEs) based on chitosan: methylcellulose (CS:MC) incorporated with various amounts of ammonium iodide (NH_4I) salt are described. Solution cast technique was adapted for the preparation of the SPBE films. Structural investigation and extent of interaction of the NH_4I salt with the CS:MC film surface were conducted through X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy measurements. Electrical DC conductivity of the prepared samples was studied by electrochemical impedance spectroscopy. It is confirmed through transference number (TNM) analysis that ions are the dominant charge carrier in the Polymer electrolyte system, in which the ionic ( t _ ion ) and electron ( t _ el ) transference numbers were found to be 0.934 and 0.036, respectively. Through the use of linear sweep voltammetry (LSV), the CS:MC:NH_4I system is found to experience electrolyte degradation at 2.1 V. The Polymer Blend electrolyte sample with highest DC conductivity property was also used as separator in electrical double-layer capacitor (EDLC) cell. Two identical activated carbon electrodes were used to sandwich the electrolyte film. Cyclic voltammetry (CV) was used to show the capacitive behavior of the fabricated EDLC cell, in which no redox peaks were observed. The EDLC was examined for 100 cycles at current density of 0.2 mA/cm^2. The values of specific capacitance and equivalent series resistance were determined to be 1.76 F/g, and 650 to 1050 Ω, respectively.
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effect of ohmic drop on electrochemical performance of edlc fabricated from pva dextran nh4i based Polymer Blend electrolytes
Journal of materials research and technology, 2020Co-Authors: M H Hamsan, M F Z Kadir, Shujahadeen B. Aziz, M. A. Brza, Saifful Kamaluddin Muzakir, Rebar T. AbdulwahidAbstract:Abstract Proton conducting solid Polymer Blend electrolytes based on poly(vinyl alcohol)(PVA):dextran that were doped with different quantities of ammonium iodide (NH4I) were prepared. The X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) study were carried out to examine the compatibility of NH4I withPVA:dextran Polymers. FTIR spectroscopy assessment was used to establish the presence of a complex formation between the PVA:dextran and added salt through the modification and reduction in the intensity of FTIR bands relevant to the functional groups. The field emission scanning electron microscopy (FESEM) examination was used to assess the channels for proton transport. Electrical impedance spectroscopy (EIS) was used to analyse the samples conductivity behaviour. The sample with 20 wt.% of added salt has shown a high DC conductivity which can be employed in electrochemical devices such as EDLC. It is also demonstrated by the transference number (TNM) and linear sweep voltammetry (LSV) that it is appropriate to use the largest conducting sample for electrochemical device. There was electrochemical stability of the electrolyte sample with voltage sweeping linearly to 1.3 V. It is shown by the outcome of cyclic voltammetry (CV) plot that charge storage at the site of electrode-electrolyte is non-Faradiac. A high drop voltage ( V d = I R ) is implied by the usual galvanostatic charge-discharge. The equivalent series resistance ( R e s ) increases as a result of the increase in V d all the way through the charge-discharge cycle. Specific capacitance ( C s p ) is nearly constant from the foremost cycle to the 100th cycle, with average of 4.2 F/g.
Haitao Wang - One of the best experts on this subject based on the ideXlab platform.
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a novel type of shape memory Polymer Blend and the shape memory mechanism
Polymer, 2009Co-Authors: Heng Zhang, Haitao Wang, Wei Zhong, Qiangguo DuAbstract:Abstract A novel styrene–butadiene–styrene tri-block coPolymer (SBS) and poly(ɛ-caprolactone) (PCL) Blend were introduced for its shape memory properties. Compared to the reported shape memory Polymers (SMPs), this novel elastomer and switch Polymer Blend not only simplified the fabrication process but also offer a controllable approach for the study of mechanisms and the optimization of shape memory performances. Microstructures of this Blend were characterized by differential scanning calorimetry (DSC), AFM microscope observation and tensile test. DSC results demonstrated the immiscibility between SBS and PCL. AFM images and stress–strain plot further confirmed the two-phase morphology within the Blend. It was found that the SBS and PCL continuous phases contributed to the shape recovery and shape fixing performances, respectively. A detailed shape memory mechanism for this type of SMP system was then concluded and an optimized SMP system with both good recovery and fixing performances was designed from this mechanism.
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A novel type of shape memory Polymer Blend and the shape memory mechanism
Polymer, 2009Co-Authors: Heng Zhang, Haitao Wang, Wei Zhong, Qiangguo DuAbstract:A novel styrene-butadiene-styrene tri-block coPolymer (SBS) and poly(??-caprolactone) (PCL) Blend were introduced for its shape memory properties. Compared to the reported shape memory Polymers (SMPs), this novel elastomer and switch Polymer Blend not only simplified the fabrication process but also offer a controllable approach for the study of mechanisms and the optimization of shape memory performances. Microstructures of this Blend were characterized by differential scanning calorimetry (DSC), AFM microscope observation and tensile test. DSC results demonstrated the immiscibility between SBS and PCL. AFM images and stress-strain plot further confirmed the two-phase morphology within the Blend. It was found that the SBS and PCL continuous phases contributed to the shape recovery and shape fixing performances, respectively. A detailed shape memory mechanism for this type of SMP system was then concluded and an optimized SMP system with both good recovery and fixing performances was designed from this mechanism. ?? 2009 Elsevier Ltd. All rights reserved.
Wei Zhong - One of the best experts on this subject based on the ideXlab platform.
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a novel type of shape memory Polymer Blend and the shape memory mechanism
Polymer, 2009Co-Authors: Heng Zhang, Haitao Wang, Wei Zhong, Qiangguo DuAbstract:Abstract A novel styrene–butadiene–styrene tri-block coPolymer (SBS) and poly(ɛ-caprolactone) (PCL) Blend were introduced for its shape memory properties. Compared to the reported shape memory Polymers (SMPs), this novel elastomer and switch Polymer Blend not only simplified the fabrication process but also offer a controllable approach for the study of mechanisms and the optimization of shape memory performances. Microstructures of this Blend were characterized by differential scanning calorimetry (DSC), AFM microscope observation and tensile test. DSC results demonstrated the immiscibility between SBS and PCL. AFM images and stress–strain plot further confirmed the two-phase morphology within the Blend. It was found that the SBS and PCL continuous phases contributed to the shape recovery and shape fixing performances, respectively. A detailed shape memory mechanism for this type of SMP system was then concluded and an optimized SMP system with both good recovery and fixing performances was designed from this mechanism.
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A novel type of shape memory Polymer Blend and the shape memory mechanism
Polymer, 2009Co-Authors: Heng Zhang, Haitao Wang, Wei Zhong, Qiangguo DuAbstract:A novel styrene-butadiene-styrene tri-block coPolymer (SBS) and poly(??-caprolactone) (PCL) Blend were introduced for its shape memory properties. Compared to the reported shape memory Polymers (SMPs), this novel elastomer and switch Polymer Blend not only simplified the fabrication process but also offer a controllable approach for the study of mechanisms and the optimization of shape memory performances. Microstructures of this Blend were characterized by differential scanning calorimetry (DSC), AFM microscope observation and tensile test. DSC results demonstrated the immiscibility between SBS and PCL. AFM images and stress-strain plot further confirmed the two-phase morphology within the Blend. It was found that the SBS and PCL continuous phases contributed to the shape recovery and shape fixing performances, respectively. A detailed shape memory mechanism for this type of SMP system was then concluded and an optimized SMP system with both good recovery and fixing performances was designed from this mechanism. ?? 2009 Elsevier Ltd. All rights reserved.