Neat Chitosan Porous Materials: A Review of Preparation, Structure Characterization and Application

Grzybek, Paweł; Jakubski, Łukasz; Dudek, Gabriela

doi:10.3390/ijms23179932

Cited by 32 publications

(37 citation statements)

References 132 publications

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“…Instead of employing a CS gel membrane, an inorganic porogen (silica particles) is used in this study. To obtain the silica particles, a dried CS membrane containing them was first obtained . The silica particles were then extracted using a solution of NaOH.…”

Section: Resultsmentioning

confidence: 99%

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Comparative Study of the Extraction of Cu(II) and Fe(II) Ions Using Chitosan and Modified Chitosan/Polyvinylpyrrolidone Adsorptive Membranes: Adsorption, Kinetic, and Thermodynamic Study

Arora

Jangid

Srivastava

et al. 2023

ACS Appl. Polym. Mater.

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The current work examined chitosan's adsorption capabilities for removing Cu(II) and Fe(II) ions from the aqueous phase in a batch equilibrium system. The membranes were prepared using the leaching-out method. The effects of the adsorbent's initial pH, concentration, temperature, and dose on adsorption were examined. Adsorption tests were conducted at temperatures ranging from 15 to 45 °C and initial concentration ranges of 20−400 mg/L. The observations from the adsorption isotherms fitted the Langmuir and Freundlich model adequately. The nonlinear form of the pseudo-first-order model was followed by the kinetics of Cu(II) and Fe(II) on chitosan, and the model parameters were reliably obtained. The endothermic and spontaneous character of Cu(II) and Fe(II) adsorption on chitosan adsorbents was verified by the computed negative values of standard Gibbs free energy and positive enthalpy changes. Finally, chitosan (CS) showed to be an efficient adsorbent for the removal of Cu(II) and Fe(II) ions due to its high adsorption capacity for Cu(II), which was 182.15 mg/g for C1, 331.28 mg/g for C2, and 384.31 mg/g for C3, and Fe(II), which was 201.67 mg/g for C1, 352.53 mg/g for C2, and 315.8 mg/g for C3 (where C1 is the CS membrane, C2 is the CS/silica membrane, and C3 is the CS/polyvinylpyrrolidone membrane).

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Section: Resultsmentioning

confidence: 99%

“…To obtain the silica particles, a dried CS membrane containing them was first obtained. 28 The silica particles were then extracted using a solution of NaOH. The pore structure could be retained in this way even after drying.…”

Section: Fabrication Of Chitosan Macroporous Membranes and Impact Of ...mentioning

confidence: 99%

Comparative Study of the Extraction of Cu(II) and Fe(II) Ions Using Chitosan and Modified Chitosan/Polyvinylpyrrolidone Adsorptive Membranes: Adsorption, Kinetic, and Thermodynamic Study

Arora

Jangid

Srivastava

et al. 2023

ACS Appl. Polym. Mater.

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“…3D scaffolds, similar to the real ECM of tissues, can improve blood supply to cells and their viability. − Therefore, it is better to employ sponge-like scaffolds with sufficient pores to achieve this goal and create a platform similar to the extracellular matrix for cells. Various methods, such as applying porogens , and freeze-drying, are used to prepare scaffolds with the desired porosity . Among these methods, freeze-drying is the easiest and most widely used.…”

Section: Discussionmentioning

confidence: 99%

Development of a Composite Hydrogel Containing Statistically Optimized PDGF-Loaded Polymeric Nanospheres for Skin Regeneration: In Vitro Evaluation and Stem Cell Differentiation Studies

Hazrati,

Alizadeh,

Soltani

et al. 2024

ACS Omega

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Platelet-derived growth factor-BB (PDGF-BB) is a polypeptide growth factor generated by platelet granules faced to cytokines. It plays a role in forming and remodeling various tissue types, including epithelial tissue, through interaction with cell-surface receptors on most mesenchymal origin cells. However, it breaks down quickly in biological fluids, emphasizing the importance of preserving them from biodegradation. To address this challenge, we formulated and evaluated PDGF-encapsulated nanospheres (PD@PCEC) using polycaprolactone-polyethylene glycol-polycaprolactone. PD@PCECs were fabricated through the triple emulsion methodology and optimized by using the Box− Behnken design. The encapsulation efficiency (EE) of nanoencapsulated PDGF-BB was investigated concerning four variables: stirring rate (X1), stirring duration (X2), poly(vinyl alcohol) concentration (X3), and PDGF-BB concentration (X4). The selected optimized nanospheres were integrated into a gelatin-collagen scaffold (PD@PCEC@GC) and assessed for morphology, biocompatibility, in vitro release, and differentiation-inducing activity in human adipose-derived stem cells (hADSCs). The optimized PD@PCEC nanospheres exhibited a particle size of 177.9 ± 91 nm, a zeta potential of 5.2 mV, and an EE of 87.7 ± 0.44%. The release profile demonstrated approximately 85% of loaded PDGF-BB released during the first 360 h, with a sustained release over the entire 504 h period, maintaining bioactivity of 87.3%. The study also included an evaluation of the physicochemical properties of the scaffolds and an assessment of hADSC adhesion to the scaffold's surface. Additionally, hADSCs cultivated within the scaffold effectively differentiated into keratinocyte-like cells (KLCs) over 21 days, evidenced by morphological changes and upregulation of keratinocyte-specific genes, including cytokeratin 18, cytokeratin 19, and involucrin, at both transcriptional and protein levels.

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“…Porogens (pore precursors) are often used as additives to form pores in low-k thin films 16 , 17 . Porogens are tiny molecules or polymers that are added to the precursor solution prior to the formation of the thin film.…”

Section: Introductionmentioning

confidence: 99%

Millisecond flash lamp curing for porosity generation in thin films

Attallah,

Prucnal,

Buttering

et al. 2023

Sci Rep

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Flash lamp annealing (FLA) with millisecond pulse durations is reported as a novel curing method for pore precursor's degradation in thin films. A case study on the curing of dielectric thin films is presented. FLA-cured films are being investigated by means of positron annihilation spectroscopy (PAS) and Fourier-transform infrared (FTIR) spectroscopy in order to quantify the nm-scale porosity and post-treatment chemistry, respectively. Results from positron annihilation reveal the onset of the formation of porous voids inside the samples at 6 ms flash treatment time. Moreover, parameter's adjustment (flash duration and energy density) allows for identifying the optimum conditions of effective curing. Within such a systematic investigation, positron results indicate that FLA is able to decompose the porogen (pore precursors) and to generate interconnected (open porosity) or isolated pore networks with self-sealed pores in a controllable way. Furthermore, FTIR results demonstrate the structural evolution after FLA, that help for setting the optimal annealing conditions whereby only a residual amount of porogen remains and at the same time a well-densified matrix, and a hydrophobic porous structures are created. Raman spectroscopy suggests that the curing-induced self-sealing layer developed at the film surface is a graphene oxide-like layer, which could serve as the outside sealing of the pore network from intrusions.

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Neat Chitosan Porous Materials: A Review of Preparation, Structure Characterization and Application

Cited by 32 publications

References 132 publications

Comparative Study of the Extraction of Cu(II) and Fe(II) Ions Using Chitosan and Modified Chitosan/Polyvinylpyrrolidone Adsorptive Membranes: Adsorption, Kinetic, and Thermodynamic Study

Comparative Study of the Extraction of Cu(II) and Fe(II) Ions Using Chitosan and Modified Chitosan/Polyvinylpyrrolidone Adsorptive Membranes: Adsorption, Kinetic, and Thermodynamic Study

Development of a Composite Hydrogel Containing Statistically Optimized PDGF-Loaded Polymeric Nanospheres for Skin Regeneration: In Vitro Evaluation and Stem Cell Differentiation Studies

Millisecond flash lamp curing for porosity generation in thin films

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