Arabic gum-based composite hydrogels reinforced with eucalyptus and pinus residues for controlled phosphorus release

Souza, Alana G.; Cesco, Cassiele T.; Lima, Giovanni F. de; Artifon, Samantha E.S.; Rosa, Derval dos Santos; Paulino, Alexandre Tadeu

doi:10.1016/j.ijbiomac.2019.08.106

Cited by 43 publications

(8 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This corroborates the higher thermal degradation temperature and lower thermal degradation percentage for CDBM (Table 2). Hydrogel biodegradation processes are also evidenced by reversible chemical interactions between polymer monomers and dyes [2], and the porosity of chemically cross-linked hydrogel networks [35,36]. This is clear when comparing physically and chemically cross-linked polymeric networks.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 97%

“…Overall, the swelling mechanism in acidic media mainly takes place due to electrostatic repulsion forces among cationic amine groups, whereas in alkaline media, it mainly takes place due to electrostatic repulsion forces among anionic carboxyl groups. Moreover, intermolecular interactions among amine/carboxylic groups and water molecules favor the swelling processes [35].…”

Section: Swelling Kineticsmentioning

confidence: 99%

See 1 more Smart Citation

Methylene Blue Release from Chitosan/Pectin and Chitosan/DNA Blend Hydrogels

2021

Self Cite

View full text Add to dashboard Cite

Chitosan/DNA blend hydrogel (CDB) and chitosan/pectin blend hydrogel (CPB) were synthesized using an emulsion (oil-in-water) technique for the release of methylene blue (model molecule). Both hydrogels were characterized by swelling assays, Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM), before and after the methylene blue (MB) loading. Higher swelling degrees were determined for both hydrogels in simulated gastric fluid. FT-IR spectra inferred absorption peak changes and shifts after MB loading. The TGA results confirmed changes in the polymer network degradation. The SEM images indicated low porosities on the hydrogel surfaces, with deformed structure of the CPB. Smoother and more uniform surfaces were noticed on the CDB chain after MB loading. Higher MB adsorption capacities were determined at lower initial hydrogel masses and higher initial dye concentrations. The MB adsorption mechanisms on the hydrogel networks were described by the monolayer and multilayer formation. The MB release from hydrogels was studied in simulated gastric and intestinal fluids, at 25 °C and 37 °C, with each process taking place at roughly 6 h. Higher release rates were determined in simulated gastric fluid at 25 °C. The release kinetics of MB in chitosan/DNA and chitosan/pectin matrices follows a pseudo-second-order kinetic mechanism.

show abstract

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 97%

Section: Swelling Kineticsmentioning

confidence: 99%

Methylene Blue Release from Chitosan/Pectin and Chitosan/DNA Blend Hydrogels

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Gum arabic solutions have been found to have very low viscosities, due to the fact that compared to other biopolymers, the highly branched structure of gum arabic has low intermolecular interactions and does not generate a three-dimensional structure [ 64 ]. Hydrogels based on gum arabic therefore have limited mechanical and rheological properties, and are often brittle [ 65 ].…”

Section: Naturally Occurring Polyelectrolytesmentioning

confidence: 99%

Naturally Occurring Polyelectrolytes and Their Use for the Development of Complex-Based Mucoadhesive Drug Delivery Systems: An Overview

et al. 2021

View full text Add to dashboard Cite

Biopolymers have several advantages for the development of drug delivery systems, since they are biocompatible, biodegradable and easy to obtain from renewable resources. However, their most notable advantage may be their ability to adhere to biological tissues. Many of these biopolymers have ionized forms, known as polyelectrolytes. When combined, polyelectrolytes with opposite charges spontaneously form polyelectrolyte complexes or multilayers, which have great functional versatility. Although only one natural polycation—chitosan has been widely explored until now, it has been combined with many natural polyanions such as pectin, alginate and xanthan gum, among others. These polyelectrolyte complexes have been used to develop multiple mucoadhesive dosage forms such as hydrogels, tablets, microparticles, and films, which have demonstrated extraordinary potential to administer drugs by the ocular, nasal, buccal, oral, and vaginal routes, improving both local and systemic treatments. The advantages observed for these formulations include the increased bioavailability or residence time of the formulation in the administration zone, and the avoidance of invasive administration routes, leading to greater therapeutic compliance.

show abstract

“…and tasteless polysaccharide; it has been widely applied from ancient times to the present for different purposes in pharmaceutical, food, and other industries. 52 , 53 Its molecular structure has a complex mixture of glycoproteins and sugars acting as active sites on immobilization processes. It includes mainly of polysaccharides arabinose and galactose, calcium, magnesium, and potassium salts.…”

Section: Hydrogel Matrixes As Enzyme Carriersmentioning

confidence: 99%

Recent Advances of Macromolecular Hydrogels for Enzyme Immobilization in the Food Products

et al. 2021

View full text Add to dashboard Cite

Enzymes are one of the main biocatalysts with various applications in the food industry. Stabilization of enzymes on insoluble carriers is important due to the low reuse, low operational stability, and high cost in applications. The immobility and the type of carrier affect the activity of the immobile enzyme. Hydrogels are three-dimensionally cross-linked macromolecular network structures designed from various polymers. Hydrogels can provide a matrix for an immobile enzyme due to their extraordinary properties such as high water absorbing capacity, carrier of bioactive substances and enzymes, biocompatibility, safety, and biodegradability. Therefore, this study mainly focuses on some enzymes (Lactase, Lipases, Amylases, Pectinase, Protease, Glucose oxidase) that are of special importance in the food industry. These enzymes could be immobilized in the hydrogels constructed of macromolecules such as kappa-carrageenan, chitosan, arabic gum, pectin, alginate, and cellulose. At last, in the preparation of these hydrogels, different enzyme immobilization methods in macromolecular hydrogels, and effect of hydrogels on enzyme activity were discussed.

show abstract

Arabic gum-based composite hydrogels reinforced with eucalyptus and pinus residues for controlled phosphorus release

Cited by 43 publications

References 35 publications

Methylene Blue Release from Chitosan/Pectin and Chitosan/DNA Blend Hydrogels

Methylene Blue Release from Chitosan/Pectin and Chitosan/DNA Blend Hydrogels

Naturally Occurring Polyelectrolytes and Their Use for the Development of Complex-Based Mucoadhesive Drug Delivery Systems: An Overview

Recent Advances of Macromolecular Hydrogels for Enzyme Immobilization in the Food Products

Contact Info

Product

Resources

About