Antioxidant nano-fiber composite membrane containing nervilia fordii extract and preparation method and application thereof

A technology of nanofibers and blue skyflower, which is applied in the field of nanomaterials and food packaging materials, can solve the problems of anti-oxidation nano-packaging films that have not been reported, are difficult to dissolve in water, and limit applications, so as to improve poor water solubility and good biocompatibility performance, easy operation

Active Publication Date: 2018-12-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blue Skyflower contains flavonoids, steroids, triterpenes, amino acids, volatile oils and other active ingredients, among which flavonoids and other substances have good antioxidant activity. There is no report on the research of oxidized nano-packaging film
Although flavonoids and phenolic acids in plant extracts have good antioxidant effects, they are insoluble in water and unstable, which limits their application in the field of food packaging

Method used

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  • Antioxidant nano-fiber composite membrane containing nervilia fordii extract and preparation method and application thereof
  • Antioxidant nano-fiber composite membrane containing nervilia fordii extract and preparation method and application thereof
  • Antioxidant nano-fiber composite membrane containing nervilia fordii extract and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The optimization of the extraction conditions of blue skyflower, the specific steps are as follows:

[0043] (1) Select different conditions to extract the blue skyflower

[0044] Dissolve 20g of blue skyflower leaf powder in 40%, 60%, 80%, 95% ethanol solution, extract under reflux at 80°C for 2 times according to the ratio of solid to liquid 1:20, each time for 2h, and then concentrate by rotary evaporator to obtain Alcoholic extracts;

[0045] Dissolve 20g of blue skyflower leaf powder in 60% ethanol solution, at the extraction temperature of 50°C, 60°C, 70°C, 80°C, 90°C, reflux extraction twice according to the ratio of solid to liquid at 1:20, each time for 2h, and then pass Concentrate with a rotary evaporator to obtain each alcohol extract;

[0046] Dissolve 20g of blue skyflower leaf powder in 60% ethanol solution, reflux extraction at 70°C for 2 times according to the ratio of solid to liquid 1:5, 1:10, 1:15, 1:20, each time for 2h, and then pass through a ro...

Embodiment 2

[0058] The antioxidant activity evaluation of the extracts of N. chinensis obtained by different extraction solvents, the specific operation steps are as follows:

[0059] (1) According to the method in Example 1, the alcoholic extract of S. radiata was prepared. The specific steps are as follows: 20g of blue skyflower powder is extracted under the conditions of ethanol volume fraction 56%, temperature 75°C, and solid-liquid ratio 1:14, and concentrated by a rotary evaporator to obtain an alcohol extract.

[0060] (2) Three kinds of extractants, petroleum ether, ethyl acetate and n-butanol, were selected, and according to the polarity of the extractants, extracts of blue skyflower with different polarities were sequentially obtained. The specific method is: add the ethanol extract obtained in (1) into 100mL water to dissolve, then add an equal amount of petroleum ether, extract for 4h, collect the upper layer, which is the petroleum ether extraction phase, and extract the lowe...

Embodiment 3

[0064] The total phenol content of different extraction phases was determined by the Folin phenol colorimetric method, and the specific steps were as follows:

[0065] (1) According to the method in Example 2, different extracts of blue skyflower were prepared.

[0066] (2) Take 100 μL of each extraction phase prepared with 70% ethanol at different concentrations (0.1mg / mL, 0.5mg / mL, 1mg / mL, 2mg / mL), add 0.5mL of Folinol reagent and 7.9mL of water, mix uniform. Protect from light for 5 min, then add 1.5 mL of 10% Na 2 CO 3 solution, after mixing, it was protected from light at room temperature for 2 h, and its absorbance was measured at 765 nm. Using different concentrations of gallic acid (20, 40, 60, 80, 100 μg / mL) as the standard substance, the total phenol content of each extraction phase was calculated by standard curves. The results of the determination of the total phenol content under the above process conditions are shown in Table 1. Through comparison, it is foun...

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Abstract

The invention belongs to the field of nano materials and food packaging materials, and particularly relates to a method for preparing nervilia fordii extracts into nervilia fordii extract/ polyving akohol/ polyvinylpyrrolidone nano-fiber composite membrane by means of an electrospinning technology. The method comprises the steps that a spinning solution containing the nervilia fordii extract, thepolyvinylpyrrolidone and a polyving akohol solution is prepared, the spinning solution passes through an electrospinning device to conduct electrospinning to obtain a nano-fiber membrane containing the nervilia fordii extract; the spinning voltage is 13-25 kV, the distance from a needle to a receiver is 12-16 cm, and the spinning rate is 0.2-0.6 mL/h. The process is simple and the conditions are mild, and the nervilia fordii extract is embedded by polymer to enhance the solubility of the nervilia fordii extract; in addition, the nervilia fordii extract has good sustained-release effect, good oxidation resistance, low toxicity, and has a broad application prospect in the field of food packaging materials.

Description

technical field [0001] The invention belongs to the field of nanomaterials and food packaging materials, and in particular relates to a method for preparing an anti-oxidation nanofiber composite film containing blue skyflower extract by using electrospinning technology and its application. Background technique [0002] Food antioxidant active packaging is an active packaging method that disperses a certain amount of antioxidants in the packaging material or coats the surface of the material, and prolongs the shelf life of food by inhibiting the oxidative decomposition of food. Antioxidants are substances that can scavenge oxygen free radicals, inhibit or eliminate and slow down oxidation reactions. Antioxidants currently used in food packaging mainly include synthetic antioxidants and natural antioxidants. Synthetic antioxidants can be obtained by chemical synthesis, mainly including butylated hydroxyanisole (BHA), dibutyl hydroxytoluene (BHT), propyl gallate (PG), tertiary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00D01F1/10D01F8/10
CPCD01D5/003D01D5/0092D01F1/10D01F8/10D04H1/728
Inventor 吴虹温雁温棚宗敏华
Owner SOUTH CHINA UNIV OF TECH
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