New polyelectrolyte complex from pectin/chitosan and montmorillonite clay

Costa, Marcia Parente Melo da; Ferreira, Ivana Lourenço de Mello; Cruz, Matheus

doi:10.1016/j.carbpol.2016.03.025

Cited by 74 publications

(32 citation statements)

References 36 publications

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“…8 Synthesizing composites from various clay types and biopolymers, such as pectin and chitosan, results in hydrogels with high absorbtivity. 9 In this study, bionanocomposite systems were prepared from montmorillonite clay and chitosan, and their thermal, antibacterial and swelling behaviors were investigated. Also, the effect of different types of montmorillonite on the chitosan biopolymer matrix was determined.…”

Section: Introductionmentioning

confidence: 99%

Chitosan/Clay Bionanocomposites: Structural, Antibacterial, Thermal and Swelling Properties

Çankaya¹,

Sahin²

2019

Cellulose Chem. Technol.

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In this study, Na + Montmorillonite (C Na), Nanoclay 1-135 (C 10A) and Nanoclay 1-140 (C 15A) were used as nanofiller in the preparation of chitosan biopolymer/clay nanocomposites. For this purpose, a dilute acetic acid solution was used as solvent for dissolving and dispersing the chitosan and the clays, respectively, and chitosan/C Na, chitosan/C 10A and chitosan/C 15A bionanocomposites were synthesized. Bionanocomposites were prepared by the solution induced intercalation method with various percentages of the three clay types. Then, the properties of the bionanocomposites were investigated as the loading of the clays was varied: 1%, 3%, 5%, and 7%. The characterization of the composites was done chemically by FTIR, physically by XRD and SEM, and thermally by TGA/DTA. Also, swelling tests of the clay and bionanocomposites were carried out. In addition, their antimicrobial properties were investigated towards Staphylococcus aureus and Escherichia coli. The highest antimicrobial activity was found for the chitosan/C 10A biocomposite. It was observed that the thermal stability of the bionanocomposites increased with increasing amount of clay added to chitosan. All the chitosan/clay biocomposites were observed by XRD and SEM, which revealed exfoliation behavior.

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Section: Introductionmentioning

confidence: 99%

Chitosan/Clay Bionanocomposites: Structural, Antibacterial, Thermal and Swelling Properties

Çankaya¹,

Sahin²

2019

Cellulose Chem. Technol.

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“…3) revealed a more extensive unfolded 3D network of the material, which could be attributed to the cross-linking reaction leading to the formation of closely packed chain rearrangement of polymer and clay particles (Abdel Kalek et al, 2012;Hafida et al, 2014). The SEM image of the composite verified that the material contained a porous structure (Lewandowska et al 2014;Costa et al 2016). Results indicated that percentage removal of metals increased from 60% to 95%, 35%…”

Section: Fig 2 Ftir Spectra Of Chitosan Bentonite and Chitosan Gramentioning

confidence: 72%

Chitosan-g-poly(acrylic acid)-bentonite composite: a potential immobilizing agent of heavy metals in soil

et al. 2018

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Aiming to achieve heavy metal adsorption in water and soil environments, a montmorillonite rich bentonite was graft-copolymerized with chitosan, and the obtained composite material was evaluated as a metal immobilizing agent for remediating metal contaminated soil. The graft-copolymerization reaction in the composite was confirmed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) techniques. Batch adsorption studies with varying experimental conditions, such as adsorbent amount, pH and metal concentration, were conducted to assess the metal adsorption capacity of the composite. The adsorption pattern followed the Langmuir isotherm model, and maximum monolayer capacity was 88.5, 72.9, 51.5 and 48.5 mg g-1 for Cu, Zn, Cd and Ni, respectively. Amendment of a contaminated soil with the composite enhanced the metal retention capacity by 3.4, 3.2, 4.9 and 5.6-fold for Cu, Zn, Cd and Ni, respectively, over unamended soil. The desorption percentage of metals from the composite treated soil was significantly lower than the unamended contaminated soil. The findings indicated that immobilization of heavy metals in soils could be achieved by the chitosan-bentonite, which would potentially be an inexpensive and sustainable environmental remediation technology.

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“…More recently, numerous PECs based on polysaccharides and proteins have been formulated as carriers for drug delivery, DNA delivery, or tissue engineering (2,4,7). Many different polyanions have been used for the formation of PECs with chitosan, such as natural polymers and their semi-synthetic derivatives (e.g., alginates (13)(14)(15)(16)(17)(18), pectin (19)(20)(21)(22)(23), xanthan gum (11,12,(24)(25)(26)(27), carrageenan (28)(29)(30), carboxymethylcellulose (31,32), collagen (25)), synthetic polymers and tripolyphosphate (TPP) (33) (Tab. I).…”

Section: Introductionmentioning

confidence: 99%

Biocompatible non-covalent complexes of chitosan and different polymers: Characteristics and application in drug delivery

Ćirić¹,

Krajišnik²,

Čalija³

et al. 2020

Arhiv za farmaciju

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The formulation of biocompatible drug carriers based on cationic biopolymer chitosan and natural or synthetic polymers represents an important research interest. Therefore, this review aims to perceive their potential in drug delivery. The most investigated chitosan-based polymer blends are polyelectrolyte complexes (PECs) obtained by establishing ionic interactions with biocompatible polyanions as alginates, pectin, xanthan gum, carrageenan, carboxymethylcellulose, and collagen. Depending on the preparation conditions, PECs could be prepared in versatile forms including membranes/films, hydrogel beads, nanoparticles, and microparticles, to achieve controlled (e.g., extended, delayed, colon-specific and pH-dependent) drug delivery. PECs can encapsulate hydrophilic and lipophilic drug substances with different molecular weights. Drug encapsulation allows the preservation of their structure, activity, improvement in absorption efficiency, reduction in adverse effects and long-term stability in vitro and in vivo. The biocompatible structures as non-covalent chitosan-based complexes could be formed also by establishing hydrogen bonds, for example with poly(vinyl alcohol). The swelling of these complexes is not pH-dependent and encapsulated drug substances are often released by already known types of diffusion. Moreover, grafted chitosan derivatives (e.g., carboxymethyl chitosan, trimethyl chitosan, acrylated chitosan) are synthesized to improve water solubility at a wide pH range and enhance the encapsulation capacity of promising PEC-based drug carriers.

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New polyelectrolyte complex from pectin/chitosan and montmorillonite clay

Cited by 74 publications

References 36 publications

Chitosan/Clay Bionanocomposites: Structural, Antibacterial, Thermal and Swelling Properties

Chitosan/Clay Bionanocomposites: Structural, Antibacterial, Thermal and Swelling Properties

Chitosan-g-poly(acrylic acid)-bentonite composite: a potential immobilizing agent of heavy metals in soil

Biocompatible non-covalent complexes of chitosan and different polymers: Characteristics and application in drug delivery

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