CN104098793B - A kind of cm-chitosan natural complex fresh-keeping film and preparation method thereof - Google Patents
A kind of cm-chitosan natural complex fresh-keeping film and preparation method thereof Download PDFInfo
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- CN104098793B CN104098793B CN201410305349.6A CN201410305349A CN104098793B CN 104098793 B CN104098793 B CN 104098793B CN 201410305349 A CN201410305349 A CN 201410305349A CN 104098793 B CN104098793 B CN 104098793B
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Abstract
The invention discloses a kind of cm-chitosan natural complex fresh-keeping film and preparation method thereof, relate to Food Packaging technology field, be made up of the raw material of following mass percent: cm-chitosan 2%-5%, glycerine 1%-1.4%, paraffin 0.5%-1%, Trisodium trimetaphosphate 0.5%-0.8%, food grade tween-80 0.1%-0.5%, Bulbus Allii quintessence oil 0.05%-0.2%, Sorbic Acid 0.15%-0.3%, silicon-dioxide 0.05%-0.2%, distilled water 94.85%-95.40%, first by said ratio preparation fresh-keeping liquid, again fresh-keeping liquid is coated on membrane carrier surface, after film solidification, it is stripped down from membrane carrier, obtain cm-chitosan natural complex fresh-keeping film.Preservative film prepared by the present invention has the features such as transparency is high, snappiness good, nerve is good, rate of perviousness is low, quality and the shelf-lives of food can be significantly improved, increase economic benefit, and have good biocompatibility with organism, there is not residual toxicity problem.
Description
Technical field:
The present invention relates to Food Packaging technology field, be specifically related to a kind of cm-chitosan natural complex fresh-keeping film and preparation method thereof.
Background technology:
Preservative film is a kind of plastic packing product, is mainly used in the aspects such as refrigerator food is preserved, fresh and prepared food packaging, has a wide range of applications in daily life.But in the course of processing of preservative film, in order to improve its application performance, often adding the multiple auxiliary agents such as softening agent, stablizer and linking agent, the not only difficult degradation of obtained preservative film, and certain potential safety hazard is existed to organism.
Cm-chitosan is a kind of water-solubility chitosan derivative, and abundance is nonpoisonous and tasteless, biocidal property is strong, and the film obtained by it has good gas selective permeability, effectively can reduce respiratory intensity and the transpiration of fruits and vegetables, thus keep the freshness of fruits and vegetables, extend the staging life of fruits and vegetables.Research shows that cm-chitosan has stronger restraining effect to the food spoilage that streptococcus aureus, Escherichia coli and Bacillus subtilis these three kinds are common in addition, and also has obvious restraining effect to yeast flora, flavacin and aspergillus niger etc.
Summary of the invention:
Technical problem to be solved by this invention is to provide that a kind of transparency is high, snappiness good, nerve is good and cm-chitosan natural complex fresh-keeping film with good fungistatic effect and preparation method thereof.
Technical problem to be solved by this invention adopts following technical scheme to realize:
A kind of cm-chitosan natural complex fresh-keeping film, be made up of the raw material of following mass percent:
Cm-chitosan 2%-5%, glycerine 1%-1.4%, paraffin 0.5%-1%, Trisodium trimetaphosphate 0.5%-0.8%, food grade tween-80 0.1%-0.5%, Bulbus Allii quintessence oil 0.05%-0.2%, Sorbic Acid 0.15%-0.3%, silicon-dioxide 0.05%-0.2%, distilled water 94.85%-95.40%.
A preparation method for cm-chitosan natural complex fresh-keeping film, comprises the steps:
Step a: first distilled water is heated to boiling, paraffin, silicon-dioxide and Sorbic Acid is added under stirring, slow cooling to 60 ~ 70 DEG C after 10min, add glycerine, food grade tween, Bulbus Allii quintessence oil and cm-chitosan more successively, the lower stirring of insulation makes cm-chitosan dissolve completely, then Trisodium trimetaphosphate reaction 45-60min is added, finally by gained solution homogeneous 15-20min under rotating speed 6000r/min, vacuum outgas 10-15min under 0.09MPa, to remove the bubble in solution, obtain uniform fresh-keeping liquid;
Step b: while hot obtained fresh-keeping liquid is cast to opposite side from the side on membrane carrier surface, until fresh-keeping liquid is coated on whole membrane carrier surface equably;
Step c: the membrane carrier scribbling bacteriostasis, preservation liquid is placed in natural air drying under room temperature or is put in the baking oven of 45 DEG C dry, after film solidifies completely, it is stripped down from membrane carrier, obtain cm-chitosan natural complex fresh-keeping film.
The invention has the beneficial effects as follows: preservative film of the present invention has that transparency is high, snappiness good, nerve is good, oxygen permeability coefficient advantages of higher; And there is certain fungistatic effect, microorganism in environment can be alleviated and, to the pollution of food, significantly improve quality and the shelf-lives of food, increase economic benefit; And having good biocompatibility with organism, enzyme liberating, oxidative degradation and acid degradation can occur under certain condition, and end product of degrading is the oligopolymer such as dimerization, trimerization, there is not residual toxicity problem, security is high.
Embodiment:
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.
The composition of raw materials that the cm-chitosan natural complex fresh-keeping film of embodiment 1 to 3 preparation is used is as shown in table 1.
The composition of raw materials of table 1 embodiment
Above-described embodiment composition of raw materials is prepared chitosan composite preservative film as follows:
Step a: first distilled water is heated to boiling, paraffin, silicon-dioxide and Sorbic Acid is added under stirring, slow cooling to 60 ~ 70 DEG C after 10min, add glycerine, food grade tween, Bulbus Allii quintessence oil and cm-chitosan more successively, the lower stirring of insulation makes cm-chitosan dissolve completely, then Trisodium trimetaphosphate reaction 45-60min is added, finally by gained solution homogeneous 15-20min under rotating speed 6000r/min, vacuum outgas 10-15min under 0.09MPa, to remove the bubble in solution, obtain uniform fresh-keeping liquid;
Step b: while hot obtained fresh-keeping liquid is cast to opposite side from the side on membrane carrier surface, until fresh-keeping liquid is coated on whole membrane carrier surface equably;
Step c: the membrane carrier scribbling fresh-keeping liquid is placed in natural air drying under room temperature or is put in the baking oven of 45 DEG C dry, after film solidification, it is stripped down from membrane carrier, obtain cm-chitosan natural complex fresh-keeping film.
Cm-chitosan natural complex fresh-keeping film contrast common PE preservative film obtained for above-described embodiment is carried out following performance test, and performance measurement result is as shown in table 2.
1) tensile strength, elongation at break, measures by GB/T13022-1991 method;
2) tear strength, measures by GB/T1130 method;
3) transmittance, measures by GB/T2410-1980 method;
4) ventilation property and rate of perviousness, measures by GB1038-70, GB1037-88 method;
5) nerve: packaged by film tray, is put in 8h in 3-5 DEG C of refrigerator, and observe tray surface film degree of tightness situation, surface is tight, level and smooth is excellent, stretches tight tight, has a small amount of ripple to be general.
The performance measurement result of table 2 preservative film of the present invention
As can be seen from Table 2, the property indices of cm-chitosan natural complex fresh-keeping film of the present invention is all better than common PE film, and transparency is high, snappiness good, nerve is good, oxygen permeability coefficient advantages of higher; And there is certain fungistatic effect, microorganism in environment can be alleviated and, to the pollution of food, significantly improve quality and the shelf-lives of food, increase economic benefit; And having good biocompatibility with organism, enzyme liberating, oxidative degradation and acid degradation can occur under certain condition, and end product of degrading is the oligopolymer such as dimerization, trimerization, there is not residual toxicity problem, security is high.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (1)
1. a cm-chitosan natural complex fresh-keeping film, it is characterized in that, be made up of the raw material of following mass percent: cm-chitosan 2%-5%, glycerine 1%-1.4%, paraffin 0.5%-1%, Trisodium trimetaphosphate 0.5%-0.8%, food grade tween-80 0.1%-0.5%, Bulbus Allii quintessence oil 0.05%-0.2%, Sorbic Acid 0.15%-0.3%, silicon-dioxide 0.05%-0.2%, distilled water 94.85%-95.40%;
Its preparation method comprises the steps:
Step a: first distilled water is heated to boiling, paraffin, silicon-dioxide and Sorbic Acid is added under stirring, slow cooling to 60 ~ 70 DEG C after 10min, add glycerine, food grade tween-80, Bulbus Allii quintessence oil and cm-chitosan more successively, the lower stirring of insulation makes cm-chitosan dissolve completely, then Trisodium trimetaphosphate reaction 45-60min is added, finally by gained solution homogeneous 15-20min under rotating speed 6000r/min, vacuum outgas 10-15min under 0.09MPa, to remove the bubble in solution, obtain uniform fresh-keeping liquid;
Step b: while hot obtained fresh-keeping liquid is cast to opposite side from the side on membrane carrier surface, until fresh-keeping liquid is coated on membrane carrier surface equably;
Step c: the membrane carrier scribbling bacteriostasis, preservation liquid is placed in natural air drying under room temperature or is put in the baking oven of 45 DEG C dry, after film solidifies completely, it is stripped down from membrane carrier, obtain cm-chitosan natural complex fresh-keeping film.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104365831A (en) * | 2014-11-01 | 2015-02-25 | 东莞市青麦田数码科技有限公司 | Fruit and vegetable fresh-keeping agent |
| CN104920604B (en) * | 2014-12-18 | 2018-01-30 | 山东省花生研究所 | A kind of method that galic essential oil chitosan compelx coating suppresses aspergillus flavus pollution |
| CN105754150A (en) * | 2016-04-08 | 2016-07-13 | 苏州市鼎立包装有限公司 | Degradable medical packaging material and preparation method thereof |
| CN107674226A (en) * | 2017-10-18 | 2018-02-09 | 常德金德新材料科技股份有限公司 | Anti-mildew fresh-keeping film and preparation method thereof |
| CN109320787A (en) * | 2018-08-29 | 2019-02-12 | 浙江工业大学 | A kind of preparation method of Carboxymethyl-chitosan Membranes |
| CN114158611B (en) * | 2021-12-20 | 2023-08-11 | 南京泛成生物科技有限公司 | Preparation and application of carboxymethyl chitosan-based preservative film |
| CN115024355B (en) * | 2022-06-09 | 2023-06-09 | 宁波大学科学技术学院 | Preparation method of garlicin-based composite carrier coating for preserving chilled meat |
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| CN1580104A (en) * | 2004-05-18 | 2005-02-16 | 广西大学 | Fruit-vegetable fresh-retaining film, and its production method and equipment |
| CN101120697A (en) * | 2007-09-13 | 2008-02-13 | 上海交通大学 | Carboxymethyl chitosan fruit preserving coating agent and preparation method thereof |
| CN103772724A (en) * | 2014-01-20 | 2014-05-07 | 南通天合包装有限公司 | Preparation method for chitosan fruit and vegetable preservative film |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1580104A (en) * | 2004-05-18 | 2005-02-16 | 广西大学 | Fruit-vegetable fresh-retaining film, and its production method and equipment |
| CN101120697A (en) * | 2007-09-13 | 2008-02-13 | 上海交通大学 | Carboxymethyl chitosan fruit preserving coating agent and preparation method thereof |
| CN103772724A (en) * | 2014-01-20 | 2014-05-07 | 南通天合包装有限公司 | Preparation method for chitosan fruit and vegetable preservative film |
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| 壳聚糖复合保鲜膜制备及其拉伸性能研究;赵素芬等;《包装工程》;20120110;第33卷(第1期);第5-7页 * |
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