Spectroscopic and Thermal Studies of Polyalkoxysilanes and Silica-Chitosan Hybrid Materials

Sánchez-Fernández, Antonio; Peña-Parás, Laura; Mendoza, Elisa M.; Leyva, Alejandra González; Bautista, Luis A.; Bulach, Franz-Xaver; Monsivais-Barrón, Alejandra; Bonilla-Ríos, Jaime; Elizalde, Luis E.

doi:10.5539/jmsr.v5n1p1

Cited by 4 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The above-mentioned issues inspired authors to undertake research works aimed at comparison of changes in: (a) adsorption process [mean free adsorption Energy ( E fe )], kinetic diffusion properties [the intraparticle diffusion coefficient ( D p ) and film diffusion coefficient ( D f )], and thermodynamic parameters; (b) tensile strength, (c) tensile strain at break, (d) flexural strength, (g) thermal properties [thermogravimetric analysis (TGA)], (h) structural properties of samples [Fourier transform infrared spectroscopy (FT-IR)], and (i) surface free energy (solid-state carbon-13 nuclear magnetic resonance (solid state 13 C-NMR) spectroscopy [ 52 ]), and (j) mechanism of interaction, deformation of compounds, and adsorption energies [ONIOM and molecular dynamics (MD)]. The results are offered in the present paper.…”

Section: Introductionmentioning

confidence: 99%

Protein adsorption through Chitosan–Alginate membranes for potential applications

Murguía-Flores

Bonilla-Ríos

Canales-Fiscal

et al. 2016

Chemistry Central Journal

View full text Add to dashboard Cite

BackgroundChitosan and Alginate were used as biopolymers to prepare membranes for protein adsorption. The network requires a cross-linker able to form bridges between polymeric chains. Viscopearl-mini® (VM) was used as a support to synthesize them. Six different types of membranes were prepared using the main compounds of the matrix: VM, Chitosan of low and medium molecular weight, and Alginate.ResultsExperiments were carried out to analyze the interactions within the matrix and improvements were found against porous cellulose beads. SEM characterization showed dispersion in the compounds. According to TGA, thermal behaviour remains similar for all compounds. Mechanical tests demonstrate the modulus of the composites increases for all samples, with major impact on materials containing VM. The adsorption capacity results showed that with the removal of globular protein, as the adsorbed amount increased, the adsorption percentage of Myoglobin from Horse Heart (MHH) decreased. Molecular electrostatic potential studies of Chitosan–Alginate have been performed by density functional theory (DFT) and ONIOM calculations (Our own N-layered integrated molecular orbital and molecular mechanics) which model large molecules by defining two or three layers within the structure that are treated at different levels of accuracy, at B3LYP/6-31G(d) and PM6/6-31G(d) level of theory, using PCM (polarizable continuum model) solvation model.ConclusionsFinally, Viscopearl-mini® acts as a suitable support on the matrix for the synthesis of Chitosan–Alginate membranes instead of cross-linkers usage. Therefore, it suggests that it is a promise material for potential applications, such as: biomedical, wastewater treatment, among others.Graphical abstractChitosan, Alginate, and Cellulose beads-based membranes for protein adsorption. Special attention was given for preparation, charaterization, adsorption capacity, and molecular electrostatic potential studies calculation. Viscopearl-mini® gives support on the matrix of Chitosan–Alginate membranes instead of cross-linkers usage

show abstract

Section: Introductionmentioning

confidence: 99%

Protein adsorption through Chitosan–Alginate membranes for potential applications

Murguía-Flores

Bonilla-Ríos

Canales-Fiscal

et al. 2016

Chemistry Central Journal

View full text Add to dashboard Cite

show abstract

“…Chitosan matrix signals appeared at 105.1 (C1), 82.6 (C4), 75.8 (C3 and C5), 61.6 (C6), 58.1 (C2), 174.4 (N-acetyl C = O signal) and 24.1 (N-acetyl-methyl CH 3 signal) ppm in the 13 C CP-MAS NMR spectra ( Figure 8 and Figure 9 ) [ 26 , 27 , 28 ]. The intensity of C2/C1 in the Ch, ChG05 and ChG10 spectra was 1.52, 1.29 and 1.28.…”

Section: Resultsmentioning

confidence: 99%

Antibacterial Chitosan Nanofiber Thin Films with Bacitracin Zinc Salt

et al. 2021

View full text Add to dashboard Cite

Chitosan nanofiber has a highly uniform structure of 20–50 nm in diameter and shows high dispersibility in water due to its submicron size and high surface-to-volume ratio. The stacked nanofibers film is useful for breathability because it has a gap with a size of several tens of nm or more. However, the chemical bonds between the nanofibers cannot be broken during use. In this study, the thin films were obtained by filtration of chitosan nanofibers and 3-glycidoxypropyltrimethoxysilane (GPTMS) mixture. The addition of GPTMS changed the wettability, mechanical property and stability in water of the thin films. Bacitracin zinc salt (BZ) has been used for the localized dermatological medicines and loaded in the films. BZ interacted electrostatically with the thin films matrix and the release of BZ was controlled by the amount of GPTMS. A higher released amount of BZ showed higher antibacterial effects toward S. aureus. The film was also tested their toxicity by L929 fibroblasts. The release of less than 11.9 μg of BZ showed antibacterial effects, but were not toxic for fibroblast cells.

show abstract

A Pilot Scale Field Study of Using Phosphate Solubilizing Bacterial Native Microflora for the Use of Cheap Organic and Inorganic Phosphate Source for the Agriculture Practice of Solanum melongena Linn. (Eggplant)

Sajeesh

Paulraj

Jayakumar

et al. 2019

Materials Today: Proceedings

View full text Add to dashboard Cite

Spectroscopic and Thermal Studies of Polyalkoxysilanes and Silica-Chitosan Hybrid Materials

Cited by 4 publications

References 26 publications

Protein adsorption through Chitosan–Alginate membranes for potential applications

Protein adsorption through Chitosan–Alginate membranes for potential applications

Antibacterial Chitosan Nanofiber Thin Films with Bacitracin Zinc Salt

A Pilot Scale Field Study of Using Phosphate Solubilizing Bacterial Native Microflora for the Use of Cheap Organic and Inorganic Phosphate Source for the Agriculture Practice of Solanum melongena Linn. (Eggplant)

Contact Info

Product

Resources

About