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A kind of photosensitive antibacterial and antioxidant composite fresh-keeping film based on nano bacterial cellulose and its preparation method and application

A nano-bacteria, composite preservation technology, applied in the chemical characteristics of fibers, chemical instruments and methods, single-component cellulose rayon, etc., can solve problems such as accidental ingestion, hidden dangers of food safety, and inability to remove, and reduce adverse effects. , the effect of reducing white pollution and alleviating environmental pressure

Active Publication Date: 2022-07-15
HAINAN YUANSHENG FISHERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the plastic wrap is heated together with the food, the decomposed substances harmful to the human body may move into the food, causing food safety hazards; when the packaged food is frozen and kept fresh, the plastic wrap will freeze and stick to the food It cannot be removed, and if you don’t pay attention, you will accidentally eat it, which seriously damages the health of the eater; at the same time, these wastes are often disposed of by incineration or landfill, causing serious environmental pollution.
In addition, fossil fuels are non-renewable resources and will eventually face the dilemma of resource depletion

Method used

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  • A kind of photosensitive antibacterial and antioxidant composite fresh-keeping film based on nano bacterial cellulose and its preparation method and application
  • A kind of photosensitive antibacterial and antioxidant composite fresh-keeping film based on nano bacterial cellulose and its preparation method and application
  • A kind of photosensitive antibacterial and antioxidant composite fresh-keeping film based on nano bacterial cellulose and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The present embodiment provides a photosensitive composite fresh-keeping film based on nano-bacterial cellulose, and the preparation method thereof includes the following steps:

[0048] 1. Dispersion of Nanobacterial Cellulose Suspension

[0049] Deionized water was added to the purified bacterial cellulose with a mass percentage of 0.1%. At room temperature, the homogenization speed was 6000 r / min. After being treated with an ultra-high-speed homogenizer for 10 min, a certain amount of sodium lauryl sulfate was added. , treated with an ultrasonic cell disruptor for 5 min (frequency 15KHz), then added a certain amount of sodium lauryl sulfate, and ultrasonically treated for 5 min at room temperature until the bacterial cellulose was uniformly and stably dispersed in the water to obtain a nano-bacterial cellulose suspension. ,spare.

[0050] 2. Preparation of photodynamic antibacterial film

[0051] 20 parts of carboxymethyl chitosan solution with a degree of substitu...

Embodiment 2

[0059] The present embodiment provides a photosensitive composite fresh-keeping film based on nano-bacterial cellulose, and the preparation method thereof includes the following steps:

[0060] 1. Dispersion of Nanobacterial Cellulose Suspension

[0061] Deionized water was added to the purified bacterial cellulose with a mass percentage of 0.5%. At room temperature, the homogenization speed was 6000 r / min. After treatment with an ultra-high-speed homogenizer for 10 min, a certain amount of sodium lauryl sulfate was added. , treated with an ultrasonic cell disrupter for 5 min (frequency 15KHz), then added a certain amount of sodium dodecyl sulfate, and ultrasonically treated for 5 min at room temperature until the bacterial cellulose was uniformly and stably dispersed in the water to obtain a nano-bacterial cellulose suspension. ,spare.

[0062] 2. Preparation of photodynamic antibacterial film

[0063] 30 parts of carboxymethyl chitosan solution with a degree of substitutio...

Embodiment 3

[0071] The present embodiment provides a photosensitive composite fresh-keeping film based on nano-bacterial cellulose, and the preparation method thereof includes the following steps:

[0072] 1. Dispersion of Nanobacterial Cellulose Suspension

[0073] Deionized water was added to the purified bacterial cellulose with a mass percentage of 1%. At room temperature, the homogenization speed was 6000r / min. After being treated with an ultra-high-speed homogenizer for 10min, a certain amount of sodium lauryl sulfate was added. , treated with an ultrasonic cell disrupter for 5 min (frequency 15KHz), then added a certain amount of sodium dodecyl sulfate, and ultrasonically treated for 5 min at room temperature until the bacterial cellulose was uniformly and stably dispersed in the water to obtain a nano-bacterial cellulose suspension. ,spare.

[0074] 2. Preparation of photodynamic antibacterial film

[0075] Add 40 parts of carboxymethyl chitosan solution with a degree of substit...

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Abstract

The invention discloses a photosensitive antibacterial and antioxidant composite fresh-keeping film based on nano-bacterial cellulose, which comprises, from top to bottom, a photodynamic antibacterial film, a nano-bacterial cellulose-based anti-oxidative and anti-browning film and a nano-bacterial cellulose-based antibacterial substrate. Film; wherein, the photodynamic antibacterial film is made of nanobacterial cellulose, carboxymethyl chitosan, photosensitizer and citric acid, and the nanobacterial cellulose-based antioxidant and anti-browning film is made of nanobacterial cellulose, seaweed Made of sodium, kojic acid or its derivatives and ascorbic acid, the nanobacterial cellulose-based antibacterial base film is made of nanobacterial cellulose, chitosan and plasticizer. The invention also provides the preparation method and application of the composite fresh-keeping film. The composite fresh-keeping film of the invention has good film-forming properties and mechanical properties, as well as low water vapor transmission coefficient and good bacteriostatic activity, which can avoid a large loss of food moisture and achieve a better fresh-keeping effect.

Description

technical field [0001] The invention relates to the technical field of food packaging materials, in particular to a photosensitive antibacterial and antioxidant composite fresh-keeping film based on nano-bacterial cellulose and a preparation method and application thereof. Background technique [0002] In daily life, non-degradable polyethylene plastic wrap is commonly used to keep food fresh. However, when the plastic wrap is heated together with the food, the decomposed substances that are harmful to the human body may migrate into the food, bringing food safety hazards; when the packaged food is frozen and fresh, the plastic wrap will freeze and stick to the food. If it cannot be removed, accidental ingestion will occur if one is not careful, which seriously damages the health of consumers. At the same time, these wastes are often treated by incineration or landfill, causing serious environmental pollution. In addition, fossil fuels are non-renewable resources and will e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/04B32B23/02B32B23/10B32B33/00B32B37/10D01F2/00D01F1/10C08J5/18C08L5/08C08L1/02
CPCD01F2/00D01F1/10C08J5/18B32B9/00B32B9/047B32B23/10B32B5/02B32B33/00B32B37/10C08J2305/08C08J2401/02B32B2262/04B32B2307/716B32B2307/7145B32B2307/7246B32B2439/70
Inventor 刘晓丽郭曹羽姜启兴许艺馨周小燕王楚仪宋天祎汤玺乐杭瑜迪丽胡玛尔·迪力木拉提
Owner HAINAN YUANSHENG FISHERY