Preparation method of orange peel pectin-based porous water-absorbing edible gel
A technology of edible gel and water absorption by pores, which is applied in the field of polymer material preparation, can solve the problems of uncommon natural degradable raw materials and cross-linking agent gels, and gels that are difficult to eat, and achieves a pollution-free preparation process. , The method is simple and easy to operate, and the effect is environmentally friendly.
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Embodiment 1
[0020] At room temperature, add 1 part of fructose to 66 parts of deionized water, under stirring at 300 rpm, add 1 part of citric acid, 0.25 part of chitosan and 0.5 part of urea, after the dispersion is uniform, continue to stir at 300 rpm The reaction was stirred for 15 minutes at a constant stirring speed. Pour the obtained product into a hydrothermal kettle and heat it in an oven at 100° C. for 3.5 hours, then take out the sample, wash it with deionized water, and freeze-dry it in a vacuum dryer to obtain the product. It is measured that at room temperature, the multiple of deionized water absorbed reaches 3400% of the gel mass after drying, and the appearance is as attached figure 1 shown.
Embodiment 2
[0022] At room temperature, add 1 part of fructose to 16.5 parts of deionized water, and under stirring at 200 rpm, add 0.25 part of citric acid, 1 part of chitosan and 0.25 part of urea. The reaction was stirred for 15 minutes at a constant stirring speed. Pour the obtained product into a hydrothermal kettle and heat it in an oven at 105° C. for 2.5 hours, then take out the sample, wash it with deionized water, and freeze-dry it in a vacuum dryer to obtain the product. It is measured that at room temperature, the deionized water absorption multiple reaches 3200% of the gel mass after drying.
Embodiment 3
[0024] At room temperature, add 1 part of fructose to 33 parts of deionized water, and under stirring at 100 rpm, add 1.5 parts of citric acid, 1.5 parts of chitosan and 0.5 part of urea. The reaction was stirred for 30 minutes at a constant stirring speed. Pour the obtained product into a hydrothermal kettle and heat it in an oven at 105° C. for 3 hours, then take out the sample, wash it with deionized water, and freeze-dry it in a vacuum dryer to obtain the product. It is measured that at room temperature, the deionized water absorption multiple reaches 2800% of the gel mass after drying.
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