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Nano pectin coating-containing preservative film special for pitaya and preparation method thereof

A technology of dragon fruit and fresh-keeping film, which is applied in the field of special fresh-keeping film for dragon fruit and its preparation, and can solve the problems of poor tensile strength, elongation at break and poor light transmittance

Pending Publication Date: 2021-09-14
GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to prolong the shelf life of fruits and vegetables, an edible film made of pectin has appeared on the market. However, the thickness of the edible film is usually significantly larger than that of the traditional plastic wrap, and the tensile strength, elongation at break and light transmittance are all low. Worse than traditional plastic wrap

Method used

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  • Nano pectin coating-containing preservative film special for pitaya and preparation method thereof
  • Nano pectin coating-containing preservative film special for pitaya and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] Embodiment 1: a kind of special preservative film for dragon fruit containing nano pectin coating and preparation method thereof, the special preservative film for dragon fruit comprises polyethylene film 2 and the nano pectin coating coated on polyethylene film 2 surface, nano The coating amount of pectin coating is 3g / m 2 , the nano-pectin coating is only coated on the inner side of the polyethylene film 2, so that the nano-pectin coating can contact with the dragon fruit.

[0038] Preferably, the nano-pectin coating is made of the following raw material components and weight:

[0039] Pectin 1.5g; dehydroacetate intercalated hydrotalcite powder 0.8g; distilled water 50g; glycerol 40g.

[0040] Nano pectin coating preparation method comprises the following steps:

[0041] S1, preparation of pectin

[0042] S11. Take fresh dragon fruit, wash it with deionized water, remove the pulp, soak the peel in water at 63°C for 1.5h, remove, drain, and dry in an oven at 63°C t...

Embodiment 2

[0062] Embodiment 2: a kind of dragon fruit special-purpose preservative film containing nano-pectin coating and preparation method thereof, the difference with embodiment 1 is that the dragon fruit special-purpose preservative film comprises polyethylene film and is coated on the nanometer film surface of polyethylene film Pectin coating, the coating amount of nano pectin coating is 1g / m 2 , the nano-pectin coating is only coated on the inner side of the polyethylene film so that the nano-pectin coating can contact the dragon fruit.

[0063] Preferably, the nano-pectin coating is made of the following raw material components and weight:

[0064] Pectin 1g; dehydroacetate intercalated hydrotalcite powder 0.5g; distilled water 40g; glycerol 30g.

[0065] Nano pectin coating preparation method comprises the following steps:

[0066] S1, preparation of pectin

[0067] S11. Take fresh dragon fruit, wash it with deionized water, remove the pulp, soak the peel in water at 60°C fo...

Embodiment 3

[0076] Embodiment 3: a kind of dragon fruit special-purpose preservative film containing nano-pectin coating and preparation method thereof, the difference with embodiment 1 is that the dragon fruit special-purpose preservative film comprises polyethylene film and is coated on the nanometer film surface of polyethylene film Pectin coating, the coating amount of nano pectin coating is 7g / m 2 , the nano-pectin coating is only coated on the inner side of the polyethylene film so that the nano-pectin coating can contact the dragon fruit.

[0077] Preferably, the nano-pectin coating is made of the following raw material components and weight:

[0078] Pectin 3g; dehydroacetate intercalated hydrotalcite powder 1g; distilled water 60g; glycerol 50g.

[0079] Nano pectin coating preparation method comprises the following steps:

[0080] S1, preparation of pectin

[0081] S11. Take fresh dragon fruit, wash it with deionized water, remove the pulp, soak the peel in 70°C water for 1 h...

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Abstract

The invention discloses a nano pectin coating-containing preservative film special for pitaya and a preparation method thereof, and belongs to the technical field of preservative films, the nano pectin coating-containing preservative film special for pitaya comprises a polyethylene film and a nano pectin coating coated on the polyethylene film, and the coating weight of the nano pectin coating is 1-7g / m < 2 >. The nano pectin coating is prepared from the following raw material components in parts by weight: 1-3 parts of pectin; 0.5-1 part of dehydroacetate intercalated hydrotalcite powder; 40-60 parts of distilled water; and 30-50 parts of glycerol. The preparation method of the preservative film special for the pitaya comprises the step of smearing the nano pectin coating in the preservative film special for the pitaya and containing the nano pectin coating on the surface of the polyethylene film through a coating machine. The preservative film can effectively inhibit the growth of bacteria, prolongs the shelf life of pitaya, and has good tensile strength, elongation at break and light transmission.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping film, more specifically, it relates to a special fresh-keeping film for dragon fruit containing a nano-pectin coating and a preparation method thereof. Background technique [0002] Pectin is a macromolecular acidic linear polysaccharide, which mainly exists in plant cell walls, and has many applications in food, medicine, and chemical industries. Pectin is a hydrophilic jelly, no odor, good emulsification, thickening, stabilization and gelation, and has antiseptic, antibacterial and other properties, it is an important food additive. Dragon fruit peel contains a lot of pectin substances, if it can be used, it can turn waste into treasure. [0003] In order to prolong the shelf life of fruits and vegetables, an edible film made of pectin has appeared on the market. However, the thickness of the edible film is usually significantly larger than that of the traditional plastic wrap, and the te...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08L23/06C09D105/06C09D5/14C09D7/63B05D7/04B05D7/24B05D1/28
CPCC08J7/0427B05D7/04B05D7/24B05D1/28B05D2201/02B05D2401/21C08J2323/06C08J2405/06C08K9/04C08K3/22C08K5/053
Inventor 李昌宝辛明零东宁易萍唐雅园孙健杨莹叶冬青何雪梅李丽郑凤锦李杰民
Owner GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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