Synthesis, characterization and application of biodegradable crosslinked carboxymethyl chitosan/poly(vinyl alcohol) clay nanocomposites

Sabaa, Magdy W.; Abdallah, Heba M.; Mohamed, Nadia A.; Mohamed, Riham R.

doi:10.1016/j.msec.2015.06.043

Cited by 75 publications

(32 citation statements)

References 23 publications

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“…The remarkably large adsorption capacity of this material for metals is mainly due to the specific layered structure and existence of exchangeable hydrated cations [11]. Chitosan based nanocomposites containing MT have been used for dye removal [9,[12][13][14][15] and sorption of heavy metals [16][17][18][19] from effluents. However, their effect on contaminated soils has not yet been evaluated.…”

Section: Introductionmentioning

confidence: 99%

Utilization of a Novel Chitosan/Clay/Biochar Nanobiocomposite for Immobilization of Heavy Metals in Acid Soil Environment

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Utilization of a Novel Chitosan/Clay/Biochar Nanobiocomposite for Immobilization of Heavy Metals in Acid Soil Environment

et al. 2017

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“…It has been reported that the reinforcement of nanomaterial in bio-polymeric matrices has greatly improved the physicochemical, mechanical and thermal stability characteristic of resultants bio-polymer nanocomposites [18][19][20]. Recently, the incorporation of layered silicates and in particular montmorillonite (MMT) in chitosan has been extensively studied [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Correlation Between Proton Conductivity, Hydrophilicity, and Thermal Stability of Chitosan/Montmorillonite Composite Membrane Modified GPTMS and Their Performance in Direct Methanol Fuel Cell

Purwanto

Atmaja

Salleh

et al. 2017

MJAS

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Chitosan based inorganic hybrid membrane is a promising organic-inorganic hybrids for the development of high performance proton exchange membrane (PEM). The immobilization of modified montmorillonite (MMT) using GPTMS within chitosan matrix would possess superior physicochemical characteristics due to more hydrogen bonding formation introduced by GPTMS. Therefore, higher number hydrogen bond formation can be expected in Ch/MMT-GPTMS membrane rather than in pure Ch membrane. A fully hydrated membrane at elevated temperatures is desirable for efficient proton conduction in the membranes. It remains a critical challenge to maintain proper hydration of the membranes for the operation of the direct methanol fuel cell (DMFC). The microstructure obtained by SEM for composites showed that filler was successfully incorporated and relatively well dispersed in the chitosan polymer matrix. The role of surface modification of MMT filler by GPTMS have increase the functional group that can form hydrogen bonding which suitable for interaction with water. High water uptake is favourable for high performance PEM to facilitate great numbers of protons hopping and diffusion through the membrane. In addition, greater hydrogen bonding formation would lead to the tighter packing of composite membrane, resulting in higher bonding strength and higher thermal resistance. The Ch/MMT-GPTMS composite membrane with 5 wt% filler loading exhibited the best proton conductivity are 4.66 mScm -1 , with water contact angle value of 64.73 o . A maximum power density of 0.24 mWcm -2 was obtained with a 2M methanol feed. The relationship of water contact angle, water upake, membrane swelling, thermal stability, and proton conductivity shown suitable trend, it means that all quality of them are related to the hydrophilicity properties. AbstrakKitosan berasaskan membran hibrid tak organik ialah kacukan organik-tak organik yang menjanjikan pembangunan pertukaran proton membran berprestasi tinggi (PEM). Montmorillonit (MMT) pegun diubahsuai menggunakan GPTMS dalam matriks ISSN 1394 -2506 Purwanto et al: CORRELATION BETWEEN PROTON CONDUCTIVITY, HYDROPHILICITY, AND THERMALSTABILITY OF CHITOSAN/MONTMORILLONITE COMPOSITE MEMBRANE MODIFIED GPTMS AND THEIR PERFORMANCE IN DIRECT METHANOL FUEL CELL 676kitosan akan mempunyai ciri-ciri fiziko-kimia unggul kerana lebih pembentukan ikatan hidrogen yang diperkenalkan oleh GPTMS. Oleh itu, pembentukan jumlah ikatan hidrogen yang lebih tinggi boleh dijangka pada membran Ch/MMT-GPTMS bukannya pada membran Ch tulen. Setiap membran terhidrat sepenuhnya pada suhu tinggi adalah diperlukan untuk pengaliran proton cekap dalam membran. Ia kekal sebagai cabaran kritikal untuk mengekalkan penghidratan membran untuk operasi sel bahan api metanol langsung (DMFC). Mikrostruktur diperolehi melalui SEM untuk komposit menunjukkan bahawa pengisi telah berjaya digabungkan dan tersebar di dalam matriks polimer kitosan. Peranan pengubahsuaian permukaan MMT pengisi oleh GPTMS telah meningkatkan kumpulan berfungsi yang boleh membentuk ikat...

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“…The high amount of hydroxyl and amine group allows the chelation of metal ions on the polymer structure through electrostatic attraction and ion exchange . Chitosan has been widely used in several applications such as drug delivery, biosensors with high stability, wastewater treatment, and biomembrane fuel cell …”

Section: Introductionmentioning

confidence: 99%

“…The high amount of hydroxyl and amine group allows the chelation of metal ions on the polymer structure through electrostatic attraction and ion exchange. 37 Chitosan has been widely used in several applications such as drug delivery, 7,38 biosensors with high stability, 2 wastewater treatment, 39 and biomembrane fuel cell. 40 This versatile property of chitosan provides a capability for cross-linking a variety of agents by attaching covalent pendant chains to include a high number of basic centers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of NiO Nano‐Spheres by Templating on Chitosan as a Green Precursor

et al. 2016

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In this study, nickel oxide was prepared through the calcination of extrusion dripped chitosan/nickel nitrate beads. The morphology and structural properties of the products were studied using various characterization techniques. Uniformly distributed nickel oxide was formed as observed from the studies of surface morphology where the processing parameters play a huge role on the resulting morphology. TEM results have shown that nickel oxide with crystallite sizes of 10–30 nm was obtained. The Fourier-transform infrared spectra studies show an intense peak at 525 cm−1, which is attributed to the vibration of Ni–O bond. Furthermore, the XRD results show NiO diffraction peaks correspond to (111), (200), (220), (311), and (222) which indicates that a bunsenite structure with a face-centered cubic phase was produced in this study. The usage of 500°C as the lower limit in this study is justified due to the complete removal of the templating material as seen in the thermalgravimetric analysis studies. Furthermore, it was obtained that the largest surface area of nickel oxide synthesized using this technique is 48.024 m2/g with pore sizes of 19.843 nm. The usage of chitosan as a green template for the synthesis of nanoparticles has shown promising results which allows a more economical and sustainable approach for the fabrication of nanomaterials

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Synthesis, characterization and application of biodegradable crosslinked carboxymethyl chitosan/poly(vinyl alcohol) clay nanocomposites

Cited by 75 publications

References 23 publications

Utilization of a Novel Chitosan/Clay/Biochar Nanobiocomposite for Immobilization of Heavy Metals in Acid Soil Environment

Utilization of a Novel Chitosan/Clay/Biochar Nanobiocomposite for Immobilization of Heavy Metals in Acid Soil Environment

Correlation Between Proton Conductivity, Hydrophilicity, and Thermal Stability of Chitosan/Montmorillonite Composite Membrane Modified GPTMS and Their Performance in Direct Methanol Fuel Cell

Synthesis and Characterization of NiO Nano‐Spheres by Templating on Chitosan as a Green Precursor

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