Mechanical and optical evaluation of alginate hydrospheres produced with different cross-linking salts for industrial application

Cendon, Fernando Villaverde; Salomão, Bárbara Busnardo; Jorge, Regina Maria Matos; Mathias, Álvaro Luiz

doi:10.1007/s00396-020-04787-1

Cited by 7 publications

(10 citation statements)

References 63 publications

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“…The nature of the

binding cations can be changed, and several cations have already been tested as a cross-linking reagent for alginate hydrogels [ 13 , 30 , 31 , 38 , 40 , 41 ]. First of all, Smidsrød et al declared that

is not suitable for the gelification of alginates [ 31 ].…”

Section: Alginate Propertiesmentioning

confidence: 99%

“…It should be mentioned that

has been tested, but the mechanical properties of the obtained gel are so low that it is barely possible to manipulate [ 40 , 41 ]. It has also been demonstrated that the mechanical properties and the Young modulus of the gel are following more or less the same evolution as the strength of the interaction alginate-

, except for

, which shows one of the highest Young moduli despite its relatively low affinity for the alginates [ 40 ]. It has to be mentioned that one can improve the mechanical properties of alginate gel while using

as binding ions by changing the nature of the counter ion.…”

Section: Alginate Propertiesmentioning

confidence: 99%

“…It has to be mentioned that one can improve the mechanical properties of alginate gel while using

as binding ions by changing the nature of the counter ion. Cendon et al [ 40 ] indeed showed that by using calcium gluconate instead of calcium chloride, the Young modulus of the gel is significantly increased at fixed calcium and alginate concentrations (from around 800 kPa to 1000 kPa), putting this ionic combination among the best performers, which are Pb, Cd and Zn (all showing Young moduli just above 1000 kPa) [ 40 ].…”

Section: Alginate Propertiesmentioning

confidence: 99%

“…One of the advantages of using an alginate hydrogel as an encapsulation matrix is its ability to protect the encapsulated substance from the external environment and especially from the UV, as many molecules, proteins or organism are UV sensitive. Cendon et al [ 40 ] made the first observation on the color of the hydrogel depending on the nature of the divalent cation and its counter anions. To confirm the first optical observation, Cendon’s team performed an UV/visible absorbance study.…”

Section: Alginate Propertiesmentioning

confidence: 99%

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Encapsulation in Alginates Hydrogels and Controlled Release: An Overview

Colin,

Akpo,

Perrin

et al. 2024

Molecules

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This review aims to gather the current state of the art on the encapsulation methods using alginate as the main polymeric material in order to produce hydrogels ranging from the microscopic to macroscopic sizes. The use of alginates as an encapsulation material is of growing interest, as it is fully bio-based, bio-compatible and bio-degradable. The field of application of alginate encapsulation is also extremely broad, and there is no doubt it will become even broader in the near future considering the societal demand for sustainable materials in technological applications. In this review, alginate’s main properties and gelification mechanisms, as well as some factors influencing this mechanism, such as the nature of the reticulation cations, are first investigated. Then, the capacity of alginate gels to release matter in a controlled way, from small molecules to micrometric compounds, is reported and discussed. The existing techniques used to produce alginates beads, from the laboratory scale to the industrial one, are further described, with a consideration of the pros and cons with each techniques. Finally, two examples of applications of alginate materials are highlighted as representative case studies.

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“…The nature of the

is not suitable for the gelification of alginates [ 31 ].…”

Section: Alginate Propertiesmentioning

confidence: 99%

“…It should be mentioned that

, except for

as binding ions by changing the nature of the counter ion.…”

Section: Alginate Propertiesmentioning

confidence: 99%

“…It has to be mentioned that one can improve the mechanical properties of alginate gel while using

Section: Alginate Propertiesmentioning

confidence: 99%

Section: Alginate Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Encapsulation in Alginates Hydrogels and Controlled Release: An Overview

Colin,

Akpo,

Perrin

et al. 2024

Molecules

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show abstract

“…The strong affinity of alginates to metal cations allows their application as antibacterial hybrids (e.g., [ 108 , 109 , 110 , 111 ]). ALG-Zn (2+) complexes have been described in 792 papers [ 112 ] (e.g., [ 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 ]).…”

Section: Introductionmentioning

confidence: 99%

Poly(lactic acid)/Zinc/Alginate Complex Material: Preparation and Antimicrobial Properties

et al. 2021

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The aim of this study was to investigate an antimicrobial and degradable composite material consisting of melt-blown poly(lactic acid) nonwoven fabrics, alginate, and zinc. This paper describes the method of preparation and the characterization of the physicochemical and antimicrobial properties of the new fibrous composite material. The procedure consists of fabrication of nonwoven fabric and two steps of dip-coating modification: (1) impregnation of nonwoven samples in the solution of alginic sodium salt and (2) immersion in a solution of zinc (II) chloride. The characterization and analysis of new material included scanning electron microscopy (SEM), specific surface area (SSA), and total/average pore volume (BET). The polylactide/alginate/Zn fibrous composite were subjected to microbial activity tests against colonies of Gram-positive (Staphylococcus aureus), Gram-negative (Escherichia coli) bacterial strains, and the following fungal strains: Aspergillus niger van Tieghem and Chaetomium globosum. These results lay a technical foundation for the development and potential application of new composite as an antibacterial/antifungal material in biomedical areas.

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Alginate beads loaded with rambutan extract: characterization and stability during in vitro gastrointestinal digestion

Aksornsri,

Peanparkdee

2024

J Sci Food Agric

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BackgroundThe fallen young rambutan fruit are an underrated agricultural‐wastes which may contain several bioactive compounds. In this study, the fallen young rambutan fruit was assessed regarding their phenolic contents and antioxidant activities. In order to expand its utilization, rambutan extract‐loaded hydrogel beads were developed by basic spherification technique using sodium alginate. The effect of ratios of polymer and extract and different calcium sources were evaluated. The recovery of bioactive compounds from hydrogel beads were determined using in vitro gastrointestinal digestion models.ResultsA 50% (v/v) of ethanol yielded rambutan extract with high chemical properties. The production of hydrogel beads using ratio of 1:3 with calcium lactate (CL) provided the highest percent of production yield of 122.94%. The hydrogel beads developed using the ratio of 1:3 with combination of calcium lactate and calcium chloride (CC) showed high recovery of phenolic compounds and their antioxidant activity after simulated intestinal digestion, which were greater values compared to unencapsulated extract.ConclusionThis finding demonstrates that the ratio of wall material to rambutan extract and the calcium sources influence the physical properties, chemical properties, and in vitro gastrointestinal digestion stability of alginate beads. The obtained hydrogel beads may potential application in the food or pharmaceutical industries.This article is protected by copyright. All rights reserved.

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Mechanical and optical evaluation of alginate hydrospheres produced with different cross-linking salts for industrial application

Cited by 7 publications

References 63 publications

Encapsulation in Alginates Hydrogels and Controlled Release: An Overview

Encapsulation in Alginates Hydrogels and Controlled Release: An Overview

Poly(lactic acid)/Zinc/Alginate Complex Material: Preparation and Antimicrobial Properties

Alginate beads loaded with rambutan extract: characterization and stability during in vitro gastrointestinal digestion

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