Preparing method for macroporous konjaku gel
A technology of taro gel and gel, which is applied in the field of preparation of macroporous konjac gel, can solve the problems of slow water absorption rate, small water absorption multiple, and limited application range, and achieve the effect of promoting the formation of aggregate structure and improving moisture retention
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[0020] Example 1:
[0021] Preparation steps of macroporous konjac gel:
[0022] A: Weigh 1.62g of refined konjac powder and dissolve it in 87mL of distilled water at room temperature (10-30℃) and stir for 2 or 3 or 4 or 5 hours to form a uniform sol; B: Add 3N sodium hydroxide aqueous solution and stir evenly to make the glue The pH of the liquid is 9 or 9.5 or 10 or 10.5 or 11, and the concentration of konjac powder is 1.4-1.9%. After reacting at 70°C for 3 hours, let it cool and stand for 24 hours; C: soak and wash with distilled water to make the water neutral Sex. The gel is placed in a freezing tank at -15°C for 4 hours, thawed at room temperature for 4 hours, freeze-thaw is repeated 3 times and then freeze-dried to obtain a macroporous konjac gel. Observed by an optical microscope, the hole diameter is 150-300μm, and the water absorption factor is 41.
Example Embodiment
[0023] Example 2:
[0024] The sodium hydroxide in Example 1 was replaced with sodium carbonate, the pH was adjusted to 10.5, and the reaction was conducted at 80°C for 2 hours, and the rest was the same. Observed by an optical microscope, the hole diameter is 200-300μm, and the water absorption factor is 67.
Example Embodiment
[0025] Example 3:
[0026] The sodium hydroxide in Example 1 was replaced with potassium hydroxide, the pH was adjusted to 12, and the reaction was performed at 90° C. for 1 hour. The number of freeze-thaw cycles was 4, and the rest was the same. Observed by an optical microscope, the hole diameter is 150-300 μm, and the water absorption factor is 40.
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