Pitaya peel-based edible packaging film and preparation method thereof
一种火龙果皮、包装膜的技术,应用在包装、包装纸、运输和包装等方向,达到优良抗菌性、制备方法简单、提高货架期的效果
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Embodiment 1
[0035] Taking the edible packaging film based on pitaya peel, its components are pitaya peel slurry concentrations are product 1: 15%, product 2: 20%, product 3: 25%, product 4: 30%, product 5: 35% , Product 6: 40%, Product 7: 45%; the amount of sodium alginate and glycerin added is 0.35% and 0.20% of the above slurry, respectively;
[0036] (1) Choose fresh pitaya peel and cut it into 1.5×1.5cm cubes, blanching with 2% sodium chloride solution at 85°C for 2 minutes, pick up and rinse with cold water, and drain;
[0037] (2) According to the different ratios of dragon fruit peel: distilled water (ranging from 15:85 to 45:55), put it into a beater and beat for 10 minutes to make a film slurry;
[0038] (3) Add 0.35% sodium alginate and 0.20% glycerin to the membrane slurry, and homogenize for 8 minutes at a homogenization speed of 16000r / min to make the slurry fine and uniform;
[0039] (4) Degas for 50 minutes when the vacuum degree is -0.095MPa, and pour out the membrane slu...
Embodiment 2
[0042] The edible packaging film based on pitaya peel, its component is pitaya 35% (W / W), water 65% (W / W); Make film slurry, sorbitol is 0.2% of making film slurry quality , the sodium carboxymethyl cellulose addition is 0.35% of the quality of the film slurry, and the preparation method is the same as in Example 1.
Embodiment 3
[0044] The edible packaging film based on pitaya peel is composed of 35% pitaya peel and 65% water; the film slurry is made, glycerin is 0.3% of the mass of the film slurry, and the amount of sodium alginate added is Membrane slurry 0.4%, preparation method is the same as embodiment 1.
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