Effects of Different Rare Earth Ions on the Gel Properties of Sodium Alginate
In this paper, the gel properties of sodium alginate with Y3+, Ce3+, La3+ and Er3+ were studied. By studying the mechanical properties, equilibrium water content, ion exchange rate and gel mechanism of seaweed rare earth gel, it was found that: The coordination form of rare earth ions and carboxyl g...
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| Format: | Article |
| Language: | zho |
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The editorial department of Science and Technology of Food Industry
2022-07-01
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| Series: | Shipin gongye ke-ji |
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| Online Access: | http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2021100019 |
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| author | Chunmei CHEN Yu FU Xiaowen ZHUANG Jiachao XU Xin GAO Xiaoting FU |
| author_facet | Chunmei CHEN Yu FU Xiaowen ZHUANG Jiachao XU Xin GAO Xiaoting FU |
| author_sort | Chunmei CHEN |
| collection | DOAJ |
| description | In this paper, the gel properties of sodium alginate with Y3+, Ce3+, La3+ and Er3+ were studied. By studying the mechanical properties, equilibrium water content, ion exchange rate and gel mechanism of seaweed rare earth gel, it was found that: The coordination form of rare earth ions and carboxyl group in sodium alginate was pseudo-bridged monodentate coordination and bridge coordination. At the same time, the special three-dimensional network structure of the rare earth gel was formed through the planar and non-planar geometry formed by intramolecular and intermolecular chelation, and the gel strength of the gel formed by La3+, Y3 +, Er3+, Ce3+ and sodium alginate M/G≈1 was between 32 and 41 N, the Young’s modulus was between 14 and 20 N, the elasticity was between 55% and 59%, the equilibrium water content was greater than 93%, the strength of the four gel was Ce3+> Er3+> Y3+> La3+, the elasticity was Ce3+<Er3+<Y3+<La3+, and the ion exchange rate was: Ce3+ 52.99%, Er3+ 50.81%, Y3+ 40.74%, La3+ 39.33%. Under different M/G ratio, the affinity between rare earth ions and sodium alginate gel was quite different: When M/G=1.99>1, the affinity of seaweed rare earth gel was in this order：Er3+>Ce3+>Y3+>La3+. When M/G=0.99≈1 and M/G=0.19<1, the affinity of seaweed rare earth gel was in this order：Ce3+> Er3+> Y3+> La3+. Among them, Ce3+, Y3+ and La3+ had a certain preference for G fragment of sodium alginate, and Er3+ had a certain preference for M fragment. This study would lay a theoretical foundation for the intensive processing and utilization of sodium alginate and the development of new functional materials of rare earth elements. |
| first_indexed | 2024-04-13T09:11:14Z |
| format | Article |
| id | doaj.art-628aeed754784d40a67fabb28202af9f |
| institution | Directory Open Access Journal |
| issn | 1002-0306 |
| language | zho |
| last_indexed | 2024-04-13T09:11:14Z |
| publishDate | 2022-07-01 |
| publisher | The editorial department of Science and Technology of Food Industry |
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| series | Shipin gongye ke-ji |
| spelling | doaj.art-628aeed754784d40a67fabb28202af9f2022-12-22T02:52:52ZzhoThe editorial department of Science and Technology of Food IndustryShipin gongye ke-ji1002-03062022-07-014314525810.13386/j.issn1002-0306.20211000192021100019-14Effects of Different Rare Earth Ions on the Gel Properties of Sodium AlginateChunmei CHEN0Yu FU1Xiaowen ZHUANG2Jiachao XU3Xin GAO4Xiaoting FU5Laboratory of Seaweed Chemistry and Applied Research, Ocean University of China, Qingdao 266003, ChinaLaboratory of Seaweed Chemistry and Applied Research, Ocean University of China, Qingdao 266003, ChinaLaboratory of Seaweed Chemistry and Applied Research, Ocean University of China, Qingdao 266003, ChinaLaboratory of Seaweed Chemistry and Applied Research, Ocean University of China, Qingdao 266003, ChinaLaboratory of Seaweed Chemistry and Applied Research, Ocean University of China, Qingdao 266003, ChinaLaboratory of Seaweed Chemistry and Applied Research, Ocean University of China, Qingdao 266003, ChinaIn this paper, the gel properties of sodium alginate with Y3+, Ce3+, La3+ and Er3+ were studied. By studying the mechanical properties, equilibrium water content, ion exchange rate and gel mechanism of seaweed rare earth gel, it was found that: The coordination form of rare earth ions and carboxyl group in sodium alginate was pseudo-bridged monodentate coordination and bridge coordination. At the same time, the special three-dimensional network structure of the rare earth gel was formed through the planar and non-planar geometry formed by intramolecular and intermolecular chelation, and the gel strength of the gel formed by La3+, Y3 +, Er3+, Ce3+ and sodium alginate M/G≈1 was between 32 and 41 N, the Young’s modulus was between 14 and 20 N, the elasticity was between 55% and 59%, the equilibrium water content was greater than 93%, the strength of the four gel was Ce3+> Er3+> Y3+> La3+, the elasticity was Ce3+<Er3+<Y3+<La3+, and the ion exchange rate was: Ce3+ 52.99%, Er3+ 50.81%, Y3+ 40.74%, La3+ 39.33%. Under different M/G ratio, the affinity between rare earth ions and sodium alginate gel was quite different: When M/G=1.99>1, the affinity of seaweed rare earth gel was in this order：Er3+>Ce3+>Y3+>La3+. When M/G=0.99≈1 and M/G=0.19<1, the affinity of seaweed rare earth gel was in this order：Ce3+> Er3+> Y3+> La3+. Among them, Ce3+, Y3+ and La3+ had a certain preference for G fragment of sodium alginate, and Er3+ had a certain preference for M fragment. This study would lay a theoretical foundation for the intensive processing and utilization of sodium alginate and the development of new functional materials of rare earth elements.http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2021100019sodium alginaterare earth ionsm/g ratiogel propertiesgelation mechanism |
| spellingShingle | Chunmei CHEN Yu FU Xiaowen ZHUANG Jiachao XU Xin GAO Xiaoting FU Effects of Different Rare Earth Ions on the Gel Properties of Sodium Alginate Shipin gongye ke-ji sodium alginate rare earth ions m/g ratio gel properties gelation mechanism |
| title | Effects of Different Rare Earth Ions on the Gel Properties of Sodium Alginate |
| title_full | Effects of Different Rare Earth Ions on the Gel Properties of Sodium Alginate |
| title_fullStr | Effects of Different Rare Earth Ions on the Gel Properties of Sodium Alginate |
| title_full_unstemmed | Effects of Different Rare Earth Ions on the Gel Properties of Sodium Alginate |
| title_short | Effects of Different Rare Earth Ions on the Gel Properties of Sodium Alginate |
| title_sort | effects of different rare earth ions on the gel properties of sodium alginate |
| topic | sodium alginate rare earth ions m/g ratio gel properties gelation mechanism |
| url | http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2021100019 |
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