Preparation and Characterization of Porous Polycaprolactone Membrane for Tissue Engineering

Kim, Jin‐Tae; Kim, Tae-Hyung; Choi, Jae Ha

doi:10.14579/membrane_journal.2016.26.1.26

Cited by 7 publications

(11 citation statements)

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“…For pure SPAE membrane, the membranes with higher DS had more weight loss in this step because of more content of sulfonic acid. For the blend membranes, this step mass loss was decomposition of sulfonic acid group in both SPAE and Nafion . At last, distinct step of thermal degradation, starting at about 450 °C, was assigned to the thermal degradation of polymer backbone …”

Section: Resultsmentioning

confidence: 99%

Synthesis of Sulfonated Poly(arylene ether)s in a One‐Pot Polymerization Process and Their Nafion‐Blend Membranes for Proton Exchange Membrane Fuel Cell Applications

Fang

Xu²,

Gao

et al. 2019

ChemistrySelect

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A series of sulfonated poly(arylene ether) (SPAE) was designed and successfully synthesized via one-step polycondensation reaction, then giving flexible, transparent and uniform membranes through solution casting method. The degree of sulfonation (DS) of the yielded polymers, confirmed by 1 H NMR analysis, could be controlled by adjusting the ratio of nonsulfonated to sulfonated monomers, and physicochemical as well as electrochemical properties of the resulting SPAE membranes were systematically characterized. The ion exchange capacity (IEC) value and water uptake were elevated with the increasing of sulfonation of degree without excessive swelling issue. The membranes exhibited good thermal, oxidative and dimensional stability. Among all the SPAE membranes, proton conductivity of SPAE-80 (0.232 S cm À 1 ) is higher than that of Nafion 212 (0.205 S cm À 1 ) at 80°C under 100% relative humidity (RH). In the H 2 /air single cell test, a higher power density of 93 mW cm À 2 was generated for SPAE-80 membrane doped with 10 wt% Nafion at 50°C under 30% RH, whereas 89 mW cm À 2 for the pristine SPAE-80 membrane. The fuel cell durability of SPAE membrane was elevated when doped with Nafion.[a] Z. Fang, Dr.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Sulfonated Poly(arylene ether)s in a One‐Pot Polymerization Process and Their Nafion‐Blend Membranes for Proton Exchange Membrane Fuel Cell Applications

Fang

Xu²,

Gao

et al. 2019

ChemistrySelect

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“…where ῑ (A) is the average current, v (V s −1 ) is the scan rate and m (g) is the total mass of the electrode. [44,50,51]…”

Section: Characterizationmentioning

confidence: 99%

Development of Composite Nanostructured Electrodes for Water Desalination via Membrane Capacitive Deionization

Bakola,

Kotrotsiou,

Ntziouni

et al. 2024

Macromol. Rapid Commun.

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Novel two‐layer nanostructured electrodes were successfully prepared for their application in membrane capacitive deionization (MCDI) processes. Nanostructured carbonaceous materials such as graphene oxide (GO) and carbon nanotubes (CNTs), as well as activated carbon (AC) were dispersed in a solution of poly(vinyl alcohol) (PVA), mixed with polyacrylic acid (PAA) or polydimethyldiallylammonium chloride (PDMDAAC), and subsequently cast on the top surface of an activated carbon‐based modified graphite electrode to form a thin composite layer that was cross‐linked with glutaraldehyde (GA). Cyclic Voltammetry (CV) was performed to investigate the electrochemical properties of the composite electrodes and desalination experiments were conducted in batch mode using a MCDI unit cell to investigate the effects of i) the nanostructured carbonaceous material, ii) its concentration in the polymer blend, and iii) the molecular weight of the polymers on the desalination efficiency of the system. Comparative studies with commercial membranes were performed proving that the composite nanostructured electrodes were more efficient in salt removal. The improved performance of the composite electrodes was attributed to the ion exchange properties of the selected polymers and the increased specific capacitance of the nanostructured carbonaceous materials. This research paves the way for wider application of MCDI in water desalination.This article is protected by copyright. All rights reserved

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“…To reveal the interfacial bonding among various components, Fourier transform infrared spectroscopy (FTIR) spectra were studied, as shown in Figure 2e. Compared with pure MXene, TA@MXene nanosheets present not only the absorption peaks of TA (755 cm −1 corresponding to C=C in benzene rings) but also the redshift of the peak for the in-plane bending mode of surficial -OH (from 3441 cm −1 of MXene to 3418 cm −1 ), [31,32] demonstrating the formation of hydrophilic products in the modification process via the strong hydrogen bonding between TA molecules and MXene nanosheets, which subsequently leads to the homogeneous gradient distribution of TA@MXene in the aqueous PU matrix rather than the hydrophobicity causing random aggregation. [33,34] Additionally, as shown in the enlarged view (Figure S6, Supporting Information) of the red marker box in Figure 2e, the TA@MXene-rich surface has a significantly wider stretching vibration area and a pronounced redshift from 4000 to 1766 cm −1 compared with other samples, revealing the abundant multiple H-bonding interactions between the catechol groups of TA molecules and the oxygen-containing functional groups of PU and MXene [35] (Figure 2g), which is highly beneficial for realizing the self-healing performance of the Janus film.…”

Section: Materials Design and Characterizationmentioning

confidence: 99%

Multifunctional Flexible Sensor Based on PU‐TA@MXene Janus Architecture for Selective Direction Recognition

Bai

et al. 2023

Advanced Materials

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Multifunctional selectivity and mechanical properties are always a focus of attention in the field of flexible sensors. In particular, the construction of biomimetic architecture for sensing materials can endow the fabricated sensors with intrinsic response features and extra‐derived functions. Here, inspired by the asymmetric structural features of human skin, a novel tannic acid (TA)‐modified MXene‐polyurethane film with a bionic Janus architecture is proposed, which is prepared by gravity‐driven self‐assembly for the gradient dispersion of 2D TA@MXene nanosheets into a PU network. This obtained film reveals strong mechanical properties of a superior elongation at a break of 2056.67% and an ultimate tensile strength of 50.78 MPa with self‐healing performance. Moreover, the Janus architecture can lead to a selective multifunctional response of flexible sensors to directional bending, pressure, and stretching. Combined with a machine learning module, the sensor is endowed with high recognition rates for force detection (96.1%). Meanwhile, direction identification in rescue operations and human movement monitoring can be realized by this sensor. This work offers essential research value and practical significance for the material structures, mechanical properties, and application platforms of flexible sensors.

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Preparation and Characterization of Porous Polycaprolactone Membrane for Tissue Engineering

Cited by 7 publications

References 0 publications

Synthesis of Sulfonated Poly(arylene ether)s in a One‐Pot Polymerization Process and Their Nafion‐Blend Membranes for Proton Exchange Membrane Fuel Cell Applications

Synthesis of Sulfonated Poly(arylene ether)s in a One‐Pot Polymerization Process and Their Nafion‐Blend Membranes for Proton Exchange Membrane Fuel Cell Applications

Development of Composite Nanostructured Electrodes for Water Desalination via Membrane Capacitive Deionization

Multifunctional Flexible Sensor Based on PU‐TA@MXene Janus Architecture for Selective Direction Recognition

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