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Preparation of a selenium-water-soluble polymer polysaccharide hydrogel and its application in plant selenium enrichment
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A technology of water-soluble polymers and hydrogels, applied in the chemical synthesis of polymers and agricultural fields, to achieve good biocompatibility and degradability, simple preparation methods, and efficient utilization
Active Publication Date: 2022-07-12
SUZHOU UNIV
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[0005] In order to solve the above problems, the present invention provides a preparation of selenium-water-soluble polymer polysaccharide hydrogel and its application in plant selenium enrichment, by mixing water-soluble polymer polysaccharide and selenium-containing compound in aqueous solution and polysaccharide Physical cross-linking forms a selenium-water-soluble polymer polysaccharide hydrogel, which can be used to enrich selenium in plants, and the hydrogel can be recycled, avoiding the problems of low selenium content in agricultural products and selenium pollution caused by traditional selenium fertilizer application. Realize green selenium enrichment
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Embodiment 1
[0040] Example 1: Selenide carrageenan-agarose hydrogel
[0041] Take 1 g of agarose (Agar), 100 mL of deionized water and different contents (0, 400, 800, 1200, 1600 μg / L) of selenide carrageenan (SeCA) into the corresponding 500 mL flat-bottomed flasks. After stirring for 0.5h in an oil bath at 95°C, the solution was clear and transparent, and the agarose was basically completely dissolved at this time. The mixed solution of selenium and agarose is poured into a cylindrical mold, and after natural cooling, selenium-agarose composite hydrogels with different selenium concentrations can be formed. The hydrogels with different selenium concentrations were named as Agar(control), Agar / SeCA-Se(400μg / L), Agar / SeCA-Se(800g / L), Agar / SeCA-Se(1200μg / L), Agar / SeCA -Se (1600 μg / L).
Embodiment 2
[0042] Example 2: Sodium Selenite-Sepharose Hydrogel
[0043] Take 1g of agarose (Agar), 100mL of deionized water and different contents (0, 400, 800, 1200, 1600μg / L) of sodium selenite (Selenite) into the corresponding 500mL flat-bottomed flasks, and put them at a temperature of After stirring for 0.5h in an oil bath at 95°C, the solution was clear and transparent, and the agarose was basically completely dissolved at this time. The mixed solution of selenium and agarose is poured into a cylindrical mold, and after natural cooling, selenium-agarose composite hydrogels with different selenium concentrations can be formed. The hydrogels with different selenium concentrations were named as Agar(control), Agar / Selenite-Se(400μg / L), Agar / Selenite-Se(800μg / L), Agar / Selenite-Se(1200μg / L), Agar / Selenite -Se (1600 μg / L).
Embodiment 3
[0044] Example 3: Yeast selenium-agarose hydrogel
[0045] Take 1g of agarose (Agar), 100mL of deionized water and different contents (0, 400, 800, 1200, 1600μg / L) of yeast selenium (Se yeast) into the corresponding 500mL flat-bottomed flasks. After stirring for 0.5h in an oil bath at ℃, the solution was clear and transparent, and the agarose was basically completely dissolved at this time. The mixed solution of selenium and agarose is poured into a cylindrical mold, and after natural cooling, selenium-agarose composite hydrogels with different selenium concentrations can be formed. The hydrogels with different selenium concentrations were named Agar(control), Agar / Se yeast-Se(400μg / L), Agar / Se yeast-Se(800μg / L), Agar / Seyeast-Se(1200μg / L), Agar / Se yeast-Se (1600μg / L).
[0046] Sample Characterization
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Abstract
The invention discloses the preparation of a selenium-water-soluble polymer polysaccharide hydrogel and its application in plant selenium enrichment. The preparation method includes the following steps: (1) adding a water-soluble polymer polysaccharide and a selenium-containing compound into water, and heating and stirring to dissolve to obtain a mixed solution; (2) letting the mixed solution stand for cooling and molding to obtain a selenium-water-soluble polymer polysaccharide Composite hydrogel. The above-mentioned preparation method is simple, the reactants and the reaction process are environmentally friendly, plant seeds are sown on the surface of the composite hydrogel, and selenium-enriched plants can be obtained by culturing, and the used hydrogel can be re-formed by high-temperature dissolution to form a controllable shape The hydrogel can be recycled to achieve the efficient utilization of selenium in the hydrogel. Compared with the traditional selenium enrichment method, the use of selenium-containing hydrogel to cultivate plants avoids the problem of selenium pollution caused by selenium fertilizer application, and realizes green selenium enrichment.
Description
technical field [0001] The invention relates to the fields of polymer chemical synthesis and agriculture, in particular to the preparation of a selenium-water-soluble polymer polysaccharide hydrogel and its application in plant selenium enrichment. Background technique [0002] Selenium is an essential trace element for human and animal growth and development. It has many important functions such as scavenging free radicals, regulating redox state, preventing cancer and enhancing human immunity. Lack of selenium can interfere with the metabolism of proteins, nucleic acids and polysaccharides, leading to cardiovascular and cerebrovascular diseases, Keshan disease and other diseases. However, the human body cannot synthesize and store selenium. Currently, about 1 billion people worldwide are deficient in selenium, including China, northwestern Europe, New Zealand, Australia, and parts of the United States. In China, 70% of places are deficient in selenium, of which 30% are s...
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