CN108760732A - A kind of antimicrobial form food freshness instruction material of detectable carbon dioxide and preparation method thereof - Google Patents
A kind of antimicrobial form food freshness instruction material of detectable carbon dioxide and preparation method thereof Download PDFInfo
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- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
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- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K5/00—Use of organic ingredients
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Abstract
The invention discloses a kind of antimicrobial form food freshness of detectable carbon dioxide to indicate material, including：The instruction material is 2 according to weight part ratio by film liquid A, film liquid B, film liquid C：1-1.5:0.1-0.3 is blended, after ultrasound and heat treatment, is laid on carrier, then is carried out taking off film after vacuum drying operation and be obtained；Wherein, the film liquid A is made of following raw material：Starch, titanium oxide dispersion, calcium hydroxide, glycerine, urea, xanthans, water；The film liquid B is made of following raw material：Poly-vinyl alcohol solution；The film liquid C is made of following raw material：Methyl red solution, bromthymol blue solution.This material can inhibit the growth of bacterium in food, and detect the freshness of food.The present invention also provides the preparation methods that a kind of antimicrobial form food freshness of detectable carbon dioxide indicates material.
Description
Technical field
The present invention relates to a kind of antimicrobial form food freshness of detectable carbon dioxide to indicate material and preparation method thereof, belongs to
In food packaging applications.
Background technology
It ensures food safety, builds economic power.It is annual all over the world because food apoilage and caused by waste not
Count its number.The growth and breeding of microorganism are not only the major reason for causing food freshness to decline, and part microorganism is also
Prodigious harm can be caused to human body.The freshness of food is influenced by many factors such as the packaging lack of standardization of food, storages, is passed through
The case where often appearing in food spoilage in the shelf-life.Decline initial stage in food freshness, people are difficult to sentence by organoleptic analysis
The freshness of jejunitas product.In addition, much having wrapped food, without once having eaten behind Kaifeng, refrigeration is often utilized
Mode stores, and in this case, the freshness of food can not more judge, for such case, we develop a kind of for food
The antimicrobial form of product freshness detection indicates material, not only can fast and accurately evaluate food freshness, while can kill or press down
Microorganism caused by food, had not only reduced environmental pollution and the waste of food, but also broken traditional food in food packaging processed
The limitation that can not be antibacterial of packaging material compensates for food inspection, the defect of preservation technology, to scientific and technological progress, food industry
Development and the coordinated development of Environmental security are all of great significance.
Antimicrobial form food freshness instruction material (antibacterial food freshness indicators,
AFFI it) can effectively inhibit the microbial reproduction in packaging material itself and its internal environment and indicate its internal freshness situation.
Currently, technique only exists in research and applies the starting stage, but it to have shown conventional packaging material incomparable
Advantage, become research hotspot and the forward position of food and Material Field.The antimicrobial form indicates the antibacterial and testing principle of material
It is to add specific anti-biotic material in the material, makes material itself that can inhibit microbial reproduction, using food in daily preservation
It is reacted in the process with specific indicator generation characteristic color to cause to refer to due to certain characteristic gas of the breeding generation of microorganism
Show changes in material, to be judged to the freshness of food.
A kind of inventor's earlier application patent " instruction material and preparation method detecting food freshness by carbon dioxide
(Chinese patent application publication No.：CN105675607A in), it is new to provide a kind of food that can detect carbon dioxide in food
Freshness indicates material, but does not have food bacteria resistance function.
Since carbon dioxide is sour gas, the detection for carbon dioxide must be changed according to pH value to carry out.And
PH indicator is mostly liquid, is used alone and there is inconvenience, it is difficult to promote.Existing degradation material is mostly nonfood grade,
Do not have food freshness instruction and bacteria resistance function, is not suitable for applying in food packaging applications.
Invention content
The present invention has designed and developed a kind of antimicrobial form food freshness instruction material of detectable carbon dioxide, can inhibit
The growth of bacterium in food, and detect the freshness of food.
The present invention has also designed and developed a kind of preparation of the antimicrobial form food freshness instruction material of detectable carbon dioxide
Method adjusts the parts by weight of titanium dioxide according to the parts by weight of starch in raw material, keeps fungistatic effect more preferable.
The present invention has also designed and developed a kind of preparation of the antimicrobial form food freshness instruction material of detectable carbon dioxide
Method mixes two kinds of indicator in proportion, according to the variation of the color of instruction material, immediately detects in confined space
Carbon dioxide gas, the intuitive freshness situation for reflecting food.
Technical solution provided by the invention is：
A kind of antimicrobial form food freshness instruction material of detectable carbon dioxide, including：
The instruction material is 2 according to weight part ratio by film liquid A, film liquid B, film liquid C：1-1.5:0.1-0.3 is carried out
It is blended, after ultrasound and heat treatment, is laid on carrier, then carry out taking off film after vacuum drying operation and obtain；
Wherein, the film liquid A is made of following raw material：
Starch, titanium oxide dispersion, calcium hydroxide, glycerine, urea, xanthans, water；
The film liquid B is made of following raw material：Poly-vinyl alcohol solution；
The film liquid C is made of following raw material：Methyl red solution, bromthymol blue solution.
Preferably,
The film liquid A is made of the raw material of following parts by weight：2-6 parts of starch, titanium oxide dispersion 0.1-0.5
Part, 1-5 parts of calcium hydroxide, 1-4 parts of glycerine, 1-3 parts of urea, 0.05-0.2 parts of xanthans, 80-90 parts of water；
The film liquid B is made of the raw material of following parts by weight：3-8 parts of poly-vinyl alcohol solution；
The film liquid C is made of the raw material of following parts by weight：The methyl red solution 1- of a concentration of 0.05%-0.15%
3 parts, 2-7.5 parts of a concentration of 0.1%-0.25% bromthymol blues solution.
Preferably, the parts by weight content of the titanium dioxide changes according to the parts by weight changes of contents of starch,
The parts by weight n of titanium dioxide is：
Wherein, W is the parts by weight of starch, and ω is content of titanium dioxide in titanium oxide dispersion；
The parts by weight of remaining raw material and starch follow following proportionate relationship：Starch：Calcium hydroxide：Glycerine：Urea：
Xanthans：Water：Poly-vinyl alcohol solution：Methyl red solution：Bromthymol blue solution=2-6：1-5：1-4：1-3：0.05-0.2：
80-90：3-8：1-3：2-7.5；
Wherein, a concentration of 0.05%-0.15% of methyl red solution, a concentration of 0.1%- of bromthymol blue solution
0.25%.
Preferably, the titanium oxide dispersion is nano titanium oxide dispersion.
Preferably, include the following steps：
Step 1: in parts by weight, by 2-6 parts of starch, 0.1-0.5 parts of titanium oxide dispersion, calcium hydroxide 1-5
Part, 1-4 parts of glycerine, 1-3 parts of urea, 0.05-0.2 parts of xanthans, 80-90 parts of water are stirred and are ultrasonically treated after mixing,
Heating obtains film liquid A at 70-90 DEG C；
Step 2: in parts by weight, by 3-8 parts of polyvinyl alcohol, 85-95 parts of water is stirred after mixing, in 80-
Heating obtains film liquid B at 100 DEG C；
Step 3: in parts by weight, concentration is 1-3 parts of the methyl red solution of 0.05%-0.25%, bromothymol
Blue solution 2-7.5 parts, the two is according to portion rate 1：After 2~2.5 mixing, it is stirred and is ultrasonically treated, obtain compound indicator；
Step 4: by the film liquid A obtained above, the film liquid B and the compound indicator according to weight part ratio
For：2:1-1.5：0.1-0.3 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, at 45-65 DEG C into
Row vacuum drying, drying time 4-8h obtain the antimicrobial form instruction material after taking off film.
Preferably, heating temperature is 80 DEG C in the step 1；
Heating temperature is 90 DEG C in the step 2；
Vacuum drying temperature described in the step 4 is 55 DEG C, drying time 6h.
Preferably, the weight part ratio of methyl red solution described in the step 3 and the bromthymol blue solution is
1:2.3。
Preferably, include the following steps：
Step 1: in parts by weight, by starch, titanium oxide dispersion, calcium hydroxide, glycerine, urea, xanthan
It is stirred and is ultrasonically treated after glue and water mixing, film liquid A is obtained being heated at 70-90 DEG C；
Wherein, the parts by weight content of titanium dioxide changes, titanium dioxide according to the parts by weight changes of contents of starch
Parts by weight n be：
Wherein, W is the parts by weight of starch, and ω is content of titanium dioxide in titanium oxide dispersion；
The fractional content of remaining raw material and starch follows following proportionate relationship：Starch：Calcium hydroxide：Glycerine：Urea：
Xanthans：Water：=2-6：1-5：1-4：1-3：0.05-0.2：80-90；
Step 2: in parts by weight, by 3-8 parts of polyvinyl alcohol, 85-95 parts of water is stirred after mixing, in 80-
Heating obtains film liquid B at 100 DEG C；
Step 3: in parts by weight, concentration is 1-3 parts of the methyl red solution of 0.05%-0.25%, bromothymol
Blue solution 2-7.5 parts, the two is according to portion rate 1：After 2~2.5 mixing, it is stirred and is ultrasonically treated, obtain compound indicator；
Step 4: by the film liquid A obtained above, the film liquid B and the compound indicator according to weight part ratio
For：2:1-1.5：0.1-0.3 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, at 45-65 DEG C into
Row vacuum drying, drying time 4-8h obtain the antimicrobial form instruction material after taking off film.
Preferably,
Heating temperature is 80 DEG C in the step 1；
Heating temperature is 90 DEG C in the step 2；
Vacuum drying temperature described in the step 4 is 55 DEG C, drying time 6h.
Preferably, the weight part ratio of methyl red solution described in the step 3 and the bromthymol blue solution is
1:2.3。
Advantageous effect of the present invention：It is added to Nano titanium dioxide material, effectively harmful bacteria can be inhibited to grow,
Extend and use material itself pot-life, can be reduced during food packaging dirty due to packing caused microorganism lack of standardization
Dye problem ensures the manufacture safety of food.The parts by weight that titanium dioxide is adjusted according to the parts by weight of starch in raw material, make
Indicate that the fungistatic effect of material is more preferable.
PH indicator is combined with base material, antimicrobial form food freshness instruction material is made, high sensitivity can be according to anti-
Bacterial type indicates the color change of material, is immediately detected to the carbon dioxide gas in pack environment, reacts the new of food
Freshness situation.In basis material antimicrobial form food freshness instruction material can all instead of existing packaging material for food, or
With form of window partial alternative packaging material for food, the freshness for intuitively judging food is enabled the customer to.
Using food grade materials, keep food security coefficient high, preparation process is simple, cheap, is recycled after vacuumizing
It uses, adapts to sustainable development and environmental protection trend.
Specific implementation mode
The present invention is described in further detail below, to enable those skilled in the art being capable of evidence with reference to specification word
To implement.
The antimicrobial form food freshness that the present invention provides a kind of detectable carbon dioxide indicates material by following parts by weight
Raw material composition：Film liquid A：2-6 parts of starch, 0.1-0.5 parts of titanium oxide dispersion, 1-5 parts of calcium hydroxide, glycerine 1-4
Part, 1-3 parts of urea, 0.05-0.2 parts of xanthans, 80-90 parts of water；Film liquid B：3-8 parts of poly-vinyl alcohol solution；Film liquid C：It is a concentration of
1-3 parts of the methyl red solution of 0.05%-0.15%, 2-7.5 parts of a concentration of 0.1%-0.25% bromthymol blues solution.
In the present invention, as a preferred embodiment, titanium oxide dispersion selects nano titanium oxide dispersion.
In the present invention, as a preferred embodiment, starch selects straight chain corn starch.
In another embodiment, a kind of antimicrobial form food freshness of detectable carbon dioxide indicates material by following former material
Material composition：
Film liquid A：4 parts of starch, 0.3 part of titanium oxide dispersion, 3 parts of calcium hydroxide, 2 parts of glycerine, 2 parts of urea, xanthan
0.12 part of glue, 85 parts of water；Film liquid B：6 parts of poly-vinyl alcohol solution；Film liquid C：1 part of a concentration of 0.09% methyl red solution, concentration
For 0.18% 2.3 parts of bromthymol blue solution；Wherein, the quality parts ratio of methyl red solution and bromthymol blue solution is 1:
2.3。
In another embodiment, a kind of antimicrobial form food freshness of detectable carbon dioxide indicates material by following former material
Material composition：
Starch, titanium dioxide, calcium hydroxide, glycerine, urea, xanthans, water, poly-vinyl alcohol solution, methyl red solution,
Bromthymol blue solution；
Wherein, the number content of titanium oxide dispersion changes according to the number changes of contents of starch, titanium dioxide
Parts by weight n is：
Wherein, W is the parts by weight of starch, and ω is content of titanium dioxide in titanium oxide dispersion；
The fractional content of remaining raw material and starch follows following proportionate relationship：Starch：Calcium hydroxide：Glycerine：Urea：
Xanthans：Water：Poly-vinyl alcohol solution：Methyl red solution：Bromthymol blue solution=(2-6)：(1-5)：(1-4)：(1-3)：
(0.05-0.2)：(80-90)：(3-8)：(1-3)：(2-6).
In the present invention, as a preferred embodiment, it is 40% nano titanium oxide dispersion to select content of titanium dioxide.
The present invention also provides the preparation method that a kind of antimicrobial form food freshness of detectable carbon dioxide indicates material, packets
Include following steps：
Step 1: in parts by weight, by 2-6 parts of starch, 0.1-0.5 parts of titanium oxide dispersion, calcium hydroxide 1-5
Part, 1-4 parts of glycerine, 1-3 parts of urea, 0.05-0.2 parts of xanthans, 80-90 parts of water are stirred and are ultrasonically treated after mixing,
Heating obtains film liquid A at 70-90 DEG C；
Step 2: in parts by weight, by 3-8 parts of polyvinyl alcohol, 85-95 parts of water is stirred after mixing, in 80-
Heating obtains film liquid B at 100 DEG C；
Step 3: in parts by weight, 1-3 parts of the methyl red solution of a concentration of 0.05%-0.25% is a concentration of
2-6 parts of 0.1%-0.25% bromthymol blue solution, the two is according to portion rate 1：2~2.5 mixing after, be stirred and ultrasound at
Reason, obtains compound indicator.
Step 4: by the film liquid A obtained above, the film liquid B and the compound indicator according to weight part ratio
For：2:1-1.5：0.1-0.3 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, at 45-65 DEG C into
Row vacuum drying, drying time 4-8h obtain the antimicrobial form instruction material after taking off film.
In another embodiment, heating temperature is 80 DEG C in step 1.
In another embodiment, heating temperature is 90 DEG C in step 2.
In another embodiment, vacuum drying temperature is 55 DEG C in step 4, drying time 6h.
In the present invention, raw material mentioned above have the advantages that traditional raw material does not have and performance, below in conjunction with master
The performance of raw material is wanted to be described in detail.
Nanometer titanium dioxide antibiotic effect is better than ordinary titanium dioxide, and is added to made by Nano titanium dioxide
Nano-antibacterial type freshness indicates that material has transparency height, mechanical property excellent compared with ordinary food freshness indicates material
Good, ageing-resistant, the features such as antibiotic property is efficient, permanent.
Embodiment 1
In the present embodiment, the antimicrobial form food freshness instruction material of detectable carbon dioxide is made of following raw material：
Film liquid A：2 parts of starch, 0.1 part of titanium oxide dispersion, 1 part of calcium hydroxide, 1 part of glycerine, 1 part of urea, xanthan
0.05 part of glue, 80 parts of water；Film liquid B：3 parts of poly-vinyl alcohol solution；Film liquid C：1 part of a concentration of 0.05% methyl red solution, concentration
For 2 parts of 0.1% bromthymol blue solution.
Preparation method includes as follows：
Step 1: in parts by weight, by 2 parts of starch, 0.1 part of titanium oxide dispersion, 1 part of calcium hydroxide, the third three
1 part of alcohol, 1 part of urea, 0.05 part of xanthans, 80 parts of water are stirred and are ultrasonically treated after mixing, are heated at 70 DEG C and obtain film
Liquid A；
Step 2: in parts by weight, by 3 parts of polyvinyl alcohol, 85 parts of water is stirred after mixing, add at 80 DEG C
Heat obtains film liquid B；
Step 3: in parts by weight, 1 part of a concentration of 0.05% methyl red solution, a concentration of 0.1% bromothymol
2 parts of blue solution, the two is according to portion rate 1：After 2 mixing, it is stirred and is ultrasonically treated, obtain compound indicator；
Step 4: by the film liquid A obtained above, the film liquid B and the compound indicator according to weight part ratio
For：2:1：0.1 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, is dried in vacuo at 45 DEG C,
Drying time is 4h, and the antimicrobial form instruction material is obtained after taking off film.
Embodiment 2
In the present embodiment, the antimicrobial form food freshness instruction material of detectable carbon dioxide is made of following raw material：
Film liquid A：4 parts of starch, 0.3 part of titanium oxide dispersion, 3 parts of calcium hydroxide, 2 parts of glycerine, 2 parts of urea, xanthan
0.12 part of glue, 85 parts of water；Film liquid B：6 parts of poly-vinyl alcohol solution；Film liquid C：2 parts of a concentration of 0.09% methyl red solution, concentration
For 0.18% 4.6 parts of bromthymol blue solution.
Preparation method is as follows：
Step 1: in parts by weight, by 4 parts of starch, 0.3 part of titanium oxide dispersion, 3 parts of calcium hydroxide, the third three
2 parts of alcohol, 2 parts of urea, 0.12 part of xanthans, 85 parts of water are stirred and are ultrasonically treated after mixing, are heated at 80 DEG C and obtain film
Liquid A；
Step 2: in parts by weight, by 5 parts of polyvinyl alcohol, 90 parts of water is stirred after mixing, add at 90 DEG C
Heat obtains film liquid B；
Step 3: in parts by weight, 2 parts of a concentration of 0.9% methyl red solution, a concentration of 0.18% bromothymol
4.6 parts of blue solution, the two is according to portion rate 1：After 2.3 mixing, it is stirred and is ultrasonically treated, obtain compound indicator.
Step 4: by the film liquid A obtained above, the film liquid B and the compound indicator according to weight part ratio
For：2:1.3：0.2 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, and it is dry that vacuum is carried out at 55 DEG C
Dry, drying time 6h obtains the antimicrobial form instruction material after taking off film.
Embodiment 3
In the present embodiment, the antimicrobial form food freshness instruction material of detectable carbon dioxide is made of following raw material：
Film liquid A：6 parts of starch, 0.5 part of titanium oxide dispersion, 5 parts of calcium hydroxide, 4 parts of glycerine, 3 parts of urea, xanthan
0.2 part of glue, 90 parts of water；Film liquid B：8 parts of poly-vinyl alcohol solution；Film liquid C：3 parts of a concentration of 0.15% methyl red solution, it is a concentration of
0.25% 7.5 parts of bromthymol blue solution.
Preparation method is as follows：
Step 1: in parts by weight, by 6 parts of starch, 0.5 part of titanium oxide dispersion, 5 parts of calcium hydroxide, the third three
4 parts of alcohol, 3 parts of urea, 0.2 part of xanthans, 90 parts of water are stirred and are ultrasonically treated after mixing, are heated at 90 DEG C and obtain film
Liquid A；
Step 2: in parts by weight, by 8 parts of polyvinyl alcohol, 95 parts of water is stirred after mixing, add at 100 DEG C
Heat obtains film liquid B；
Step 3: in parts by weight, 3 parts of a concentration of 0.15% methyl red solution, a concentration of 0.25% bromine hundred
In 7.5 parts of phenol indigo plant solution, the two is according to portion rate 1：After 2.5 mixing, it is stirred and is ultrasonically treated, obtain compound indicator；
Step 4: by the film liquid A obtained above, the film liquid B and the compound indicator according to weight part ratio
For：2:1.5：0.3 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, and it is dry that vacuum is carried out at 65 DEG C
Dry, drying time 8h obtains the antimicrobial form instruction material after taking off film.
Embodiment 4
The antimicrobial form food freshness instruction material that can detect carbon dioxide in the present embodiment is made of following raw material：
Starch, titanium oxide dispersion, calcium hydroxide, glycerine, urea, xanthans, water, poly-vinyl alcohol solution, methyl
Red solution, bromthymol blue solution；
Wherein, the parts by weight content of titanium oxide dispersion changes, titanium dioxide according to the number changes of contents of starch
The parts by weight n of titanium is：
Wherein, W is the parts by weight of starch, is 4 parts, and ω is content of titanium dioxide in titanium oxide dispersion, is 40%,
Thus the parts by weight for calculating titanium oxide dispersion are 0.28 part；
The parts by weight of other raw material are：3 parts of calcium hydroxide, 2 parts of glycerine, 2 parts of urea, 0.12 part of xanthans, water
85 parts；Film liquid B：6 parts of poly-vinyl alcohol solution；Film liquid C：1 part of a concentration of 0.09% methyl red solution, a concentration of 0.18% bromine
2.3 parts of thymol blue solution.
Preparation method is as follows：
Step 1: in parts by weight, by 4 parts of starch, 0.3 part of titanium oxide dispersion, 3 parts of calcium hydroxide, the third three
2 parts of alcohol, 2 parts of urea, 0.12 part of xanthans, 85 parts of water are stirred and are ultrasonically treated after mixing, are heated at 80 DEG C and obtain film
Liquid A；
Step 2: in parts by weight, by 5 parts of polyvinyl alcohol, 90 parts of water is stirred after mixing, add at 90 DEG C
Heat obtains film liquid B；
Step 3: in parts by weight, 2 parts of a concentration of 0.9% methyl red solution, a concentration of 0.18% bromothymol
4.6 parts of blue solution, the two is according to portion rate 1：After 2.3 mixing, it is stirred and is ultrasonically treated, obtain compound indicator.
Step 4: by the film liquid A obtained above, the film liquid B and the compound indicator according to weight part ratio
For：2:1.3：0.2 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, and it is dry that vacuum is carried out at 55 DEG C
Dry, drying time 6h obtains the antimicrobial form instruction material after taking off film.
Comparative example 1
To indicate that material compares with the antimicrobial form food freshness of the detectable carbon dioxide in the present invention, in this implementation
In example, the instruction material without containing nano titanium oxide dispersion is prepared according to existing formula and technology；Indicate the original of material
Material and its parts by weight group are divided into：
Film liquid A：6 parts of starch, 5 parts of calcium hydroxide, 4 parts of glycerine, 3 parts of urea, 0.2 part of xanthans, 90 parts of water；Film liquid B：
8 parts of poly-vinyl alcohol solution；Film liquid C：3 parts of a concentration of 0.15% methyl red solution, a concentration of 0.25% bromthymol blue solution
7.5 part.
Preparation method is as follows：
Step 1: in parts by weight, by 6 parts of starch, 0.5 part of titanium oxide dispersion, 5 parts of calcium hydroxide, the third three
4 parts of alcohol, 3 parts of urea, 0.2 part of xanthans, 90 parts of water are stirred and are ultrasonically treated after mixing, are heated at 90 DEG C and obtain film
Liquid A；
Step 2: in parts by weight, by 8 parts of polyvinyl alcohol, 95 parts of water is stirred after mixing, add at 100 DEG C
Heat obtains film liquid B；
Step 3: in parts by weight, 3 parts of a concentration of 0.15% methyl red solution, a concentration of 0.25% bromine hundred
In 7.5 parts of phenol indigo plant solution, the two is according to portion rate 1：After 2.5 mixing, it is stirred and is ultrasonically treated, obtain compound indicator；
Step 4: by the film liquid A obtained above, the film liquid B and the compound indicator according to weight part ratio
For：2:1.5：0.3 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, and it is dry that vacuum is carried out at 65 DEG C
Dry, drying time 8h obtains the antimicrobial form instruction material after taking off film.
The suppression of material is indicated for the antimicrobial form food freshness of prepared detectable carbon dioxide in verification embodiment 1-4
Bacterium effect compares itself and existing formula and technology to prepare the instruction material without containing nano titanium oxide dispersion.
At normal temperatures, after commercially available bottled juice being broken seal, in the present invention, as a preferred embodiment, we select
Haw juice will be attached to bottle cap inner wall after the antimicrobial form instruction material cutting prepared by embodiment 1-4 and comparative example 1, tighten
Bottle cap carries out normal temperature storage, according to the CO in cycle monitoring Hawthorn Juice Beverages bottle2Micro organism quantity and instruction material become pornographic
Condition.Table specific as follows：
Total plate count monitors in 1 beverage of table
Material discoloration is indicated in 2 beverage of table
As can be seen from Table 1 and Table 2, it is continuously increased with the unpacking time of fruit drink, freshness is gradually reduced, drink
Total plate count in material is continuously increased, and when the freshness of fruit drink declines metachromatism in time occurs for instruction material.It presses
According to national standard, for the total plate count in fruit drink no more than 500CUF/ml, embodiment 1-3 total plate counts in 60h are small
In 500CUF/ml, embodiment total plate count in 72h is less than 500CUF/ml, and total plate count has been just in 12h for comparative example 1
More than 500CUF/ml, therefore the antimicrobial form food freshness instruction material of detectable carbon dioxide for preparing of the present invention is antibacterial
Performance is significantly better than existing formula, meanwhile, the instruction material fungistatic effect obtained from embodiment 4 it is most strong it can be shown that according to
The parts by weight content for adjusting titanium dioxide in instruction material using the specific parts by weight content of starch, can significantly improve
The performance for indicating material, makes fungistatic effect reach best.
Compared with comparative example 1, embodiment 1-4 freshness fall times are obviously slow, the time and quantity that microorganism occurs
Much lag behind the former.This illustrates that antimicrobial form amylose starches base food freshness instruction material not only has good freshness
It indicates function, also there is clear preservation.
When in use, so that instruction material is exposed aerial side and attach transparent nonporous plastic film, to exclude air
The influence of middle carbon dioxide；Hydrophobic permeable membrane is attached on its other side (contacting side with food) surface, to exclude vapor
The interference to change colour to it.
Nanometer titanic oxide material is added in indicating material, improves the antibacterial effect of instruction material, overcomes material itself
It is easily putrid and deteriorated caused by by microbial contamination, it is difficult to the problem of Shelf-life.According to the parts by weight of starch in raw material come
The parts by weight for adjusting titanium dioxide, keep fungistatic effect more preferable.Meanwhile instruction material is used for food packaging, it can be according to finger
Show the color change of material, immediately detects the carbon dioxide gas in confined space, the intuitive freshness for reacting food
Situation monitors the problem of freshness that food generates in packaging process changes in time.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of antimicrobial form food freshness of detectable carbon dioxide indicates material, which is characterized in that the instruction material is logical
It is 2 that film liquid A, film liquid B, film liquid C, which are crossed, according to weight part ratio：1-1.5:0.1-0.3 is blended, after ultrasound and heat treatment,
It is laid on carrier, then carries out taking off film after vacuum drying operation and obtain；
Wherein, the film liquid A is made of following raw material：
Starch, titanium oxide dispersion, calcium hydroxide, glycerine, urea, xanthans, water；
The film liquid B is made of following raw material：Poly-vinyl alcohol solution；
The film liquid C is made of following raw material：Methyl red solution, bromthymol blue solution.
2. the antimicrobial form food freshness of detectable carbon dioxide according to claim 1 indicates material, which is characterized in that
The film liquid A is made of the raw material of following parts by weight：2-6 parts of starch, 0.1-0.5 parts of titanium oxide dispersion, hydrogen
1-5 parts of calcium oxide, 1-4 parts of glycerine, 1-3 parts of urea, 0.05-0.2 parts of xanthans, 80-90 parts of water；
The film liquid B is made of the raw material of following parts by weight：3-8 parts of poly-vinyl alcohol solution；
The film liquid C is made of the raw material of following parts by weight：1-3 parts of the methyl red solution of a concentration of 0.05%-0.15%,
2-7.5 parts of a concentration of 0.1%-0.25% bromthymol blues solution.
3. the antimicrobial form food freshness of detectable carbon dioxide according to claim 1 indicates material, which is characterized in that
The parts by weight content of the titanium dioxide changes, the parts by weight of titanium dioxide according to the parts by weight changes of contents of starch
N is：
Wherein, W is the parts by weight of starch, and ω is content of titanium dioxide in titanium oxide dispersion；
The parts by weight of remaining raw material and starch follow following proportionate relationship：Starch：Calcium hydroxide：Glycerine：Urea：Xanthan
Glue：Water：Poly-vinyl alcohol solution：Methyl red solution：Bromthymol blue solution=2-6：1-5：1-4：1-3：0.05-0.2：80-90：
3-8：1-3：2-7.5；
Wherein, a concentration of 0.05%-0.15% of methyl red solution, a concentration of 0.1%-0.25% of bromthymol blue solution.
4. the antimicrobial form food freshness of detectable carbon dioxide according to claim 3 indicates material, which is characterized in that
The titanium oxide dispersion is nano titanium oxide dispersion.
5. a kind of preparation method of the antimicrobial form food freshness instruction material of detectable carbon dioxide, which is characterized in that including
Following steps：
Step 1: in parts by weight, by 2-6 parts of starch, 0.1-0.5 parts of titanium oxide dispersion, 1-5 parts of calcium hydroxide,
1-4 parts of glycerine, 1-3 parts of urea, 0.05-0.2 parts of xanthans, 80-90 parts of water are stirred and are ultrasonically treated after mixing,
Heating obtains film liquid A at 70-90 DEG C；
Step 2: in parts by weight, by 3-8 parts of polyvinyl alcohol, 85-95 parts of water is stirred after mixing, at 80-100 DEG C
Lower heating obtains film liquid B；
Step 3: in parts by weight, concentration is 1-3 parts of the methyl red solution of 0.05%-0.25%, and bromthymol blue is molten
2-7.5 parts of liquid, the two is according to portion rate 1：After 2~2.5 mixing, it is stirred and is ultrasonically treated, obtain compound indicator；
Step 4: being according to weight part ratio by the film liquid A obtained above, the film liquid B and the compound indicator：2:
1-1.5：0.1-0.3 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, and vacuum is carried out at 45-65 DEG C
Dry, drying time 4-8h obtains the antimicrobial form instruction material after taking off film.
6. the preparation method of the antimicrobial form food freshness instruction material of detectable carbon dioxide according to claim 5,
It is characterized in that, heating temperature is 80 DEG C in the step 1；
Heating temperature is 90 DEG C in the step 2；
Vacuum drying temperature described in the step 4 is 55 DEG C, drying time 6h.
7. the preparation method of the antimicrobial form food freshness instruction material of detectable carbon dioxide according to claim 6,
It is characterized in that, the weight part ratio of methyl red solution described in the step 3 and the bromthymol blue solution is 1:2.3.
8. a kind of preparation method of the antimicrobial form food freshness instruction material of detectable carbon dioxide, which is characterized in that including
Following steps：
Step 1: in parts by weight, by starch, titanium oxide dispersion, calcium hydroxide, glycerine, urea, xanthans and
It is stirred and is ultrasonically treated after water mixing, film liquid A is obtained being heated at 70-90 DEG C；
Wherein, the parts by weight content of titanium dioxide changes, the weight of titanium dioxide according to the parts by weight changes of contents of starch
Measuring number n is：
Wherein, W is the parts by weight of starch, and ω is content of titanium dioxide in titanium oxide dispersion；
The fractional content of remaining raw material and starch follows following proportionate relationship：Starch：Calcium hydroxide：Glycerine：Urea：Xanthan
Glue：Water：=2-6：1-5：1-4：1-3：0.05-0.2：80-90；
Step 2: in parts by weight, by 3-8 parts of polyvinyl alcohol, 85-95 parts of water is stirred after mixing, at 80-100 DEG C
Lower heating obtains film liquid B；
Step 3: in parts by weight, concentration is 1-3 parts of the methyl red solution of 0.05%-0.25%, and bromthymol blue is molten
2-7.5 parts of liquid, the two is according to portion rate 1：After 2~2.5 mixing, it is stirred and is ultrasonically treated, obtain compound indicator；
Step 4: being according to weight part ratio by the film liquid A obtained above, the film liquid B and the compound indicator：2:
1-1.5：0.1-0.3 is blended, and after being ultrasonically treated and being heated, is laid on glass carrier, and vacuum is carried out at 45-65 DEG C
Dry, drying time 4-8h obtains the antimicrobial form instruction material after taking off film.
9. the preparation method of the antimicrobial form food freshness instruction material of detectable carbon dioxide according to claim 8,
It is characterized in that,
Heating temperature is 80 DEG C in the step 1；
Heating temperature is 90 DEG C in the step 2；
Vacuum drying temperature described in the step 4 is 55 DEG C, drying time 6h.
10. the preparation method of the antimicrobial form food freshness instruction material of detectable carbon dioxide according to claim 9,
It is characterized in that, the weight part ratio of methyl red solution described in the step 3 and the bromthymol blue solution is 1:2.3.
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| CN108760732B (en) | 2021-06-18 |
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