CN101077089B - Process for prolonging rice shelf life by using nano technology - Google Patents
Process for prolonging rice shelf life by using nano technology Download PDFInfo
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- CN101077089B CN101077089B CN200710023262A CN200710023262A CN101077089B CN 101077089 B CN101077089 B CN 101077089B CN 200710023262 A CN200710023262 A CN 200710023262A CN 200710023262 A CN200710023262 A CN 200710023262A CN 101077089 B CN101077089 B CN 101077089B
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Abstract
The present invention relates to nanometer technological method of prolonging shelf life of rice, and belongs to the field of food producing and storing technology. Rice coating improver solution is first prepared through adding alcohol soluble corn protein powder into alcohol solution, heating in a water bath, centrifuging and taking supernatant, adding nanometer silica, potassium sorbate and sucrose ester into the supernatant and mixing via stirring at room temperature; and then added into rice in certain ratio during rice production. The rice coating improver solution, after evaporating, forms in the surface of rice one homogeneous compact film layer with low water vapor and oxygen permeation rate, high mechanical performance and other features, so that it can prolong the shelf life ofrice.
Description
Technical field
The present invention relates to a kind of method of utilizing nanometer technology to prolong rice shelf life, can suppress rice aging in the long-term storage process and go mouldy, belong to food processing, storage technology field.
Background technology
Rice is the most of people's in the whole world a main food, and the population of China nearly 2/3rds is staple food with the rice.In order to guarantee the needs of market supply, certain rice storage level must be arranged.But because rice has removed inside and outside shell and cortex man-hour adding, make endosperm directly exposed outside, thus in storage poor stability, ageing easily, bad variation has all taken place in the mouthfeel after its color and luster, local flavor and the boiling.At present prolonging the main means that rice shelf life adopted is that the packing of rice is improved, as inflates or inner wrapping such as vacuum, perhaps uses outward appearance, local flavor and the mouthfeel of additive to improve ageing rice when boiling.But these methods fundamentally do not prevent the ageing of rice and go mouldy.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, thereby provide a kind of method of utilizing nanometer technology to prolong rice shelf life, be re-dubbed the adjusting material of filming with zeins and nano silicon, utilize the stronger hydrogen bond action that takes place between nano silicon and the zeins molecule, make the microstructure of this adjusting material of filming more even, fine and close, have less water vapour to produce, an OTR oxygen transmission rate and can prevent preferably that rice is aging, suppress the adjusting material of filming that rice goes mouldy.
Main solution of the present invention is achieved in that
The method that the present invention utilizes nanometer technology to prolong rice shelf life adopts following processing step:
One, the film preparation method of adjusting material solution:
1, taking by weighing 8～10g zeins powder adds in the ethanolic solution of 90～110ml 80%, be placed on the magnetic stirring apparatus, at room temperature stir 3～5min, put into 60 ℃ of thermostat water baths then and heat 28～32min, centrifugal 14～16min under 1900～2100rpm rotating speed, it is standby to get supernatant;
2, take by weighing 0.05～0.2g nano silicon, 0.005～0.01g potassium sorbate, 0.05～0.1g sucrose ester through mixing, add in the above-mentioned whole supernatants that obtain after centrifugal, be placed on the magnetic stirring apparatus and under room temperature, stir 5～8min, just make the adjusting material solution of filming;
Two, the film using method of adjusting material solution:
Polishing machine top in big rice process splashes into the adjusting material solution of filming of the present invention in the rice with the flow-rate ratio according to 1.8 of rice weight flow～2.2 ‰ apart from outlet 1/2nd places.
Compared with the prior art the present invention has the following advantages:
With zeins and nano silicon is the rice of the main base-material preparation adjusting material solution of filming, solvent evaporation back forms a kind of transparent, glossiness film, this membrane tissue even structure, densification, water vapour and OTR oxygen transmission rate are less, mechanical performance is stronger, have characteristics such as protection against the tide, oxygen barrier, guarantor's perfume (or spice), can fundamentally solve the rice ageing that rice causes owing to the reasons such as immersion of moisture and go mouldy in storage, thus the shelf life that prolongs rice.
The specific embodiment
Following the present invention will be further described in conjunction with the embodiments:
Embodiment one:
Take by weighing zeins powder 10g in the embodiment of the invention, add in the ethanolic solution of 100ml 80%, be placed on and stir 3min on the magnetic stirring apparatus, put into 60 ℃ of thermostat water baths then and heat 30min, centrifugal 15min under the 2000rpm rotating speed, it is standby to get supernatant.
Take by weighing 0.1g nano silicon, 0.005g potassium sorbate, 0.05g sucrose ester through mixing, add in the above-mentioned whole supernatants that obtain after centrifugal, be placed on and stir 5min on the magnetic stirring apparatus, make the adjusting material solution of filming.Therefore zeins has characteristics such as hydrophobicity is strong, water insoluble because its composition amino acid major part is hydrophobic amino acid and sulfur-containing amino acid.Zeins becomes random ball of string structure in alcohol solution, can form a kind of transparent, glossiness film after the solvent evaporation, has characteristics such as protection against the tide, oxygen barrier, guarantor's perfume (or spice).
Polishing machine top in big rice process is apart from outlet 1/2nd places, to splash in the rice with 2.2 ‰ flow-rate ratio by the adjusting material solution of filming that the foregoing description formula rate and production technology are made according to the rice weight flow, after treating ethanol evaporation, can cover layer of transparent, glossiness film at rice surface, have characteristics such as protection against the tide, oxygen barrier, guarantor's perfume (or spice).
Use rice of the present invention to film behind the adjusting material solution, the rice storage after 1～1.5 year color and luster still the rice edible quality that goes out of light, boiling better, do not have and go mouldy.
Embodiment two:
Take by weighing zeins powder 9g in the embodiment of the invention, add in the ethanolic solution of 110ml 80%, be placed on and stir 4min on the magnetic stirring apparatus, put into 62 ℃ of thermostat water baths then and heat 32min, centrifugal 16min under the 1900rpm rotating speed, it is standby to get supernatant.
Take by weighing 0.15g nano silicon, 0.0075g potassium sorbate, 0.075g sucrose ester through mixing, add in the above-mentioned whole supernatants that obtain after centrifugal, be placed on and stir 6.5min on the magnetic stirring apparatus, make the adjusting material solution of filming.
Polishing machine top in big rice process is apart from outlet 1/2nd places, to splash in the rice with 2 ‰ flow-rate ratio by the adjusting material solution of filming that the foregoing description formula rate and production technology are made according to the rice weight flow, after treating ethanol evaporation, can cover layer of transparent, glossiness film at rice surface, have characteristics such as protection against the tide, oxygen barrier, guarantor's perfume (or spice).
After using rice adjusting material solution of the present invention, rice storage after 1.0～1.5 years color and luster still the rice edible quality that goes out of light, boiling better, do not have and go mouldy.
Embodiment three
Mainly get zeins powder 9.5g in the embodiment of the invention, add in the ethanolic solution of 105ml 80%, be placed on and stir 5min on the magnetic stirring apparatus, put into 65 ℃ of thermostat water baths then and heat 28min, centrifugal 14min under the 2100rpm rotating speed, it is standby to get supernatant.
Take by weighing 0.2g nano silicon, 0.01g potassium sorbate, 0.1g sucrose ester through mixing, add in the above-mentioned whole supernatants that obtain after centrifugal, be placed on and stir 8min on the magnetic stirring apparatus, make the adjusting material solution of filming.
Polishing machine top in big rice process is apart from outlet 1/2nd places, to splash in the rice with 1.9 ‰ flow-rate ratio by the adjusting material solution of filming that the foregoing description formula rate and production technology are made according to the rice weight flow, after treating ethanol evaporation, can cover layer of transparent, glossiness film at rice surface, have characteristics such as protection against the tide, oxygen barrier, guarantor's perfume (or spice).
After using rice adjusting material solution of the present invention, rice storage after 1.0～1.5 years color and luster still the rice edible quality that goes out of light, boiling better, do not have and go mouldy.
Raw material in the embodiment of the invention are purchased by market, and equipment adopts conventional equipment.
Claims (1)
1. method of utilizing nanometer technology to prolong rice shelf life is characterized in that adopting following processing step:
(1), the film preparation of adjusting material solution:
Taking by weighing 8～10g zeins powder adds in the ethanolic solution of 90～110ml 80%, be placed on the magnetic stirring apparatus, at room temperature stir 3～5min, put into 60 ℃ of thermostat water baths then and heat 28～32min, centrifugal 14～16min under 1900～2100rpm rotating speed, it is standby to get supernatant;
Take by weighing 0.05～0.2g nano silicon, 0.005～0.01g potassium sorbate, 0.05～0.1g sucrose ester through mixing, add the above-mentioned supernatant that obtains after centrifugal, be placed on the magnetic stirring apparatus and under room temperature, stir 5～8min, just make the adjusting material solution of filming;
(2), the film use of adjusting material solution:
Polishing machine top in big rice process is apart from outlet 1/2nd places, and adjusting material solution splashes in the rice with the flow-rate ratio according to 1.8 of rice weight flow～2.2 ‰ with filming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710023262A CN101077089B (en) | 2007-06-14 | 2007-06-14 | Process for prolonging rice shelf life by using nano technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710023262A CN101077089B (en) | 2007-06-14 | 2007-06-14 | Process for prolonging rice shelf life by using nano technology |
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| Publication Number | Publication Date |
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| CN101077089A CN101077089A (en) | 2007-11-28 |
| CN101077089B true CN101077089B (en) | 2010-05-19 |
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| CN200710023262A Expired - Fee Related CN101077089B (en) | 2007-06-14 | 2007-06-14 | Process for prolonging rice shelf life by using nano technology |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101617793B (en) * | 2009-05-20 | 2011-08-17 | 长沙理工大学 | Production method of germinated milled rice |
| CN102369974B (en) * | 2011-10-10 | 2013-03-27 | 新疆大学 | Method for retaining freshness of mutton through membrane coating |
| CN102742643A (en) * | 2012-06-28 | 2012-10-24 | 河南工业大学 | Preparation method of safe and pure natural film-forming material for fruit and vegetable preservation |
| CN108041159A (en) * | 2017-12-11 | 2018-05-18 | 福建农林大学 | A kind of processing method of quick-frozen lotus seed |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302550A (en) * | 2000-01-01 | 2001-07-11 | 天津商学院 | Process for preparing alcohol-soluble corn protein membrane from corn gluten |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302550A (en) * | 2000-01-01 | 2001-07-11 | 天津商学院 | Process for preparing alcohol-soluble corn protein membrane from corn gluten |
Non-Patent Citations (2)
| Title |
|---|
| 何慧等.玉米醇溶蛋白保鲜膜成膜工艺的优化.粮油食品科技12 3.2004,12(3),7-8. |
| 何慧等.玉米醇溶蛋白保鲜膜成膜工艺的优化.粮油食品科技12 3.2004,12(3),7-8. * |
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Granted publication date: 20100519 Termination date: 20130614 |