Calcium-induced-gel properties for ι-carrageenan in the presence of different charged amino acids

Wen, Chengrong; Wang, Nan; Dong, Yingying; Tian, Jie; Song, Shuang; Qi, Honglan

doi:10.1016/j.lwt.2021.111418

Cited by 18 publications

(2 citation statements)

References 49 publications

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“…Due to multiple negative charges, carrageenan macromolecules interact strongly with inorganic and organic cations. The texture and properties of carrageenan gels depend on the Na, K, Mg and Ca cations present [25][26][27][28][29]. Cationic dyes form ionic associates with carrageenan polyanions, resulting in hydrophobic aggregation and spectral changes [30].…”

Section: Introductionmentioning

confidence: 99%

Coagulation of Hydrophobic Ionic Associates of Cetyltrimethylammonium Bromide and Carrageenan

Shyichuk,

Ziółkowska,

Szulc

2023

Molecules

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In aqueous solutions, cetyltrimethylammonium cations bind to carrageenan polyanions, and the resulting ionic associates form macroscopic aggregates due to hydrophobic interaction. At certain ratios of cetyltrimethylammonium to carrageenan, the resulting colloidal particles auto-flocculate. According to visual observations, the ratio ranges from 1 to 3 mmol/g; otherwise the suspensions are stable. By measuring the sedimentation rate and particle size distribution, the most extensive flocculation was found to be from 1.7 to 2.3 mmol/g. The ratio corresponding to the fastest auto-flocculation was precisely determined by titrating the reagents with small increments and recording the turbidity. The turbidimetric titration plots contain distinct break points corresponding to the most extensive flocculation. These break points occur at the same ratio of carrageenan to cetyltrimethylammonium over a wide range of reagent concentrations. The precise values of the critical ratio were found to be 1.78 and 1.53 mmol/g, respectively, during the titration of cetyltrimethylammonium with carrageenan and vice versa. The number of anionic sulfate groups in carrageenan was measured by ICP OES and found to be 1.35 mmol/g. This value is consistent with the critical ratio of the auto-flocculation.

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Section: Introductionmentioning

confidence: 99%

Coagulation of Hydrophobic Ionic Associates of Cetyltrimethylammonium Bromide and Carrageenan

Shyichuk,

Ziółkowska,

Szulc

2023

Molecules

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“…In the presence of Ca 2+ , a pair of two sulfate groups on adjacent helices of the carrageenan molecule form a bridge, which complicates the molecular arrangement. This phenomenon may lead to changes in the gel properties of carrageenan [ 22 ]. For this purpose, we attempt to extract ι-carrageenan by Ca(OH) 2 (Ca-IC) instead of NaOH (Na-IC) and compare the two processes in terms of extraction process, gel properties, and basic components of products.…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Extraction, Structure, and Gel Properties of ι-Carrageenan Extracted Using Ca(OH)2

et al. 2022

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An eco-friendly method for ι-carrageenan extraction from seaweed Eucheuma denticulatum through boiling and using a low concentration of Ca(OH)2 is reported. Compared to the traditional method of ι-carrageenan extraction using NaOH, the reported method using Ca(OH)2 had the advantages of using 93.3% less alkali and 86.8% less water, having a 25.0% shorter total extraction time, a 17.6% higher yield, and a 43.3% higher gel strength of the product. In addition, we evaluated the gel properties and structures of ι-carrageenan products extracted by Ca(OH)2 (Ca-IC) and NaOH (Na-IC). The Fourier transform infrared spectroscopy results showed that the structures of Ca-IC and Na-IC did not change remarkably. The results of the thermogravimetric analysis and differential scanning calorimetry showed that Ca-IC had the same thermal stability as Na-IC. The results of the textural analysis showed that Ca-IC had a higher hardness and better chewiness compared to Na-IC. Rheological results indicated that Ca-IC and Na-IC exhibited shear-thinning and non-Newtonian fluid properties, whereas the viscosity of Ca-IC was less than that of Na-IC. In conclusion, this new method of ι-carrageenan extraction using Ca-IC is markedly better and yields higher quality carrageenan than the conventional method of using Na-IC.

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Eclipsed conformational locking: exploring iota carrageenan’s distinct behavior in ethanol–water systems via hydrogen bonding with the disulfate group

Kailkhura,

Purohit,

Bhatt

et al. 2024

Chem. Pap.

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Calcium-induced-gel properties for ι-carrageenan in the presence of different charged amino acids

Cited by 18 publications

References 49 publications

Coagulation of Hydrophobic Ionic Associates of Cetyltrimethylammonium Bromide and Carrageenan

Coagulation of Hydrophobic Ionic Associates of Cetyltrimethylammonium Bromide and Carrageenan

Eco-Friendly Extraction, Structure, and Gel Properties of ι-Carrageenan Extracted Using Ca(OH)2

Eclipsed conformational locking: exploring iota carrageenan’s distinct behavior in ethanol–water systems via hydrogen bonding with the disulfate group

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