CN1781974A - Anti-boiling and anti-freezing composite gel antibiotic film and its preparing method - Google Patents

Abstract

The present invention is a kind of anti-boiling and antifreezing composite antibiotic gel film and its preparation process. The composite gel film is prepared with esterification modified glucomannan, chitosan, beta-cyclodextrin, xanthan gum, carrageenan, one or more of tea polyphenol, potassium sorbate, sodium benzoate, sucrose ester and stearic acid, and water. The preparation process includes compounding filming liquid, heating, centrifugal deairing, filming, stoving, humidity homogenizing to soften, peeling film and product packing. The anti-boiling and antifreezing composite antibiotic gel film has certain release controlling effect and long time bacteriostasis effect, and may be used in packing heated food, frozen food, preserving packing, etc. and is superior to film of sodium alginate.

Description

A kind of anti-boiling and anti-freezing composite gel antibiotic film and preparation method thereof

Affiliated technical field the present invention relates to a kind of gel-film and preparation method thereof, particularly a kind of anti-boiling and anti-freezing composite gel antibiotic film and preparation method thereof.

The background technology gel-film generally is to be covered in the thin layer that material surface constitutes by forms such as parcel, dipping, coating, sprinklings.Gel-film can be divided into: solid film, mobile film etc.Wherein solid film can be divided into the fully bio-degradable film again, medical film and coating.Mobile film can be divided into food preservative, chemical fertilizer, pesticide slow-releasing agent and makeup again.

" daily chemical industry " 2000 the 1st phases have been delivered people's such as Zhang Donghua article " the composite product film forming research of natural polymer Rhizoma amorphophalli glucomannan ", Rhizoma amorphophalli glucomannan and modification thereof or composite product (carrageenin, carrageenin and xanthan gum, xanthan gum) membrane formation mechanism are inquired into, and the performance of film analyzed and researched, film-forming method has been proposed.Concrete operations are as follows: water-bath after 0.5g Rhizoma amorphophalli glucomannan and 5g carrageenin and the abundant swelling of 3g xanthan gum adding 500ml distilled water is boiled, be cooled to 50-60 ℃ then, pick a small amount of glue with glass stick, evenly spread upon on the sheet glass, get product after the film forming.

" Transactions of the Chinese Society of Agricultural Engineering " 2002 the 3rd phases have been delivered people's such as Yang Jun article " preparation and the performance study of edibility Rhizoma amorphophalli glucomannan water resistant, high temperature resistant composite membrane ", having introduced a kind of is that Rhizoma amorphophalli glucomannan is a base material with konjak gum, adds the method for hot preparation water resistant, high temperature resistant composite membrane under alkaline condition.Its manufacture craft is as follows: raw material → mix → add is water-soluble expand → to be heated and stir → homogeneous → add oven dry (37 ℃) → sam of lye pH adjustment value → heating → centrifugal degassing → a kind of rhyme scheme in Chinese operas serving as the prelude to a complete score for voices system film → under certain temperature ease back → take off film → storage to be measured → sample preparation → performance test.

Above-mentioned several film does not have germ resistance, and its intensity is relatively poor, water resisting property a little less than, exist degradation problem under the film strength.

Summary of the invention purpose of the present invention is utilized multiple polysaccharide, complementary stack, and interactional principle is a carrier with the plural gel film, the multiple antimicrobial substance of compound coating, the composite gel antibiotic film of synthetic formation rule.

A kind of anti-boiling and anti-freezing composite gel antibiotic film of the present invention, composition is (W/W, it is the weight percent of raw material and water, down together): konjac glucomanna esterification modified product 0.5-1.5%, chitosan 0.5-2%, cycloheptaamylose 1-1.5%, xanthan gum 0.125-0.175% and carrageenin 0.625-1%, all the other compositions are made up of one or more medicaments and water in tea-polyphenol, potassium sorbate, Sodium Benzoate, emulsifying agent (for example sucrose ester) and the stearic acid, and the content of medicament is 0.01-3%.

Konjak glucomannan esters modified product of the present invention is to be konjak glucomannan esters properties-correcting agent with the phenylformic acid, and its modification treatment temp is 50 ℃, reaction times 2h, and potential of hydrogen is pH3.

Preparation method of the present invention comprises that the preparation of film liquid, heating, the centrifugal degassing, a kind of rhyme scheme in Chinese operas serving as the prelude to a complete score for voices system film, oven dry, sam ease back, take off film and finished product packing.

The preparation of A, film liquid: earlier chitosan is added pH2.8 ± acetic acid solution in, add the aqueous solution of one or more medicaments in tea-polyphenol, potassium sorbate, Sodium Benzoate, sucrose ester and the stearic acid after the stirring and dissolving, the content of medicament is 0.01-3%; Adjust pH is to pH7.5-11, add konjac glucomanna esterification modified product, cycloheptaamylose, xanthan gum and carrageenin again, the weight percent of each raw material and water is respectively konjac glucomanna esterification modified product 0.5-1.5%, chitosan 0.5-2%, cycloheptaamylose 1-1.5%, xanthan gum 0.125-0.175% and carrageenin 0.625-1%; Then, evenly stir 0.5-1h and be made into film liquid.

B, heating: constant temperature leaves standstill 40-60min under 45-55 ℃ of condition.

C, the centrifugal degassing: use the whizzer of 3000r/min, outgased 30 minutes, remove the gas that exists in the film liquid, uniform and smooth to guarantee the film of making.

D, a kind of rhyme scheme in Chinese operas serving as the prelude to a complete score for voices system film: select the mould that adapts by the requirement of product, the plural gel film liquid of above-mentioned processing is injected in the mould, scrape off excess liquid with glass rod, smear evenly, it is level and smooth to make it any surface finish.

E, oven dry: in 40 ℃-80 ℃ baking oven, dry film forming.

F, sam ease back: the film of oven dry taken out, be put in the environment that relative humidity is 50-60%, and sam 30-40 minute, to guarantee the flexibility of film.

G, take off film: with the film lift-off stencil.

H, finished product packing: the film of peeling off is finished product by different dimensions stripping and slicing packings.

A kind of anti-boiling and anti-freezing composite gel antibiotic film of the present invention and preparation method thereof, with polysaccharide such as konjac glucomanna esterification modified products is main raw material, has special physico-chemical property and fungistatic effects such as excellent plasticity, film-forming properties and higher water-soluble, retentiveness; With the main material of konjak glucomannan esters modified product as the edibility composite gel antibiotic film, compare with sodium alginate, its tensile strength is good, the quality stability height, color and luster and fragrance and higher fungistatic effect are preferably arranged, and pigment and the essence that adds is had certain reservation effect; Also has advantage such as draw materials conveniently, cheap.Cycloheptaamylose has hydrophobic inside and hydrophilic external structure, and is soluble in water; Carrageenin, xanthan gum, chitosan and konjac glucomanna esterification modified product have the effect of synergy.After konjac glucomanna esterification modified product, chitosan, carrageenin, the xanthan gum blend along with the carrying out of intermolecular cross-linking reaction, reached compatible effect, intermolecularly alternately form new network mutually, thereby the performance of composite gel antibiotic film is significantly improved and improves.The multiple antimicrobial substance of the compound coating of composite gel antibiotic film of the present invention has and controls slow releasing function preferably, can reach the long-acting bacteriostatic effect.

A kind of anti-boiling and anti-freezing composite gel antibiotic film of the present invention is nontoxic, is used for food packaging film and has many outstanding advantages: tangible water preventing ability can delay the migration and the diffusion of food Zhong Shui and oil and other composition; Have selectable ventilation property and impermeabilisation ability; Can stop the volatilization of flavour substances in the food; But also can be used as the food color, the carrier of nutritional fortification and antioxidant etc.Utilize the characteristic of its anti-boiling, can be used for the packing of heated food, as the packing of microwave food etc.; Utilize its anti-refrigerated characteristic, can be used for the packing of frozen product; Utilize it to have germ resistance, can be used for the preservation and antisepsis packing, if fresh-keeping of vegetables etc.

Specific embodiment:, be illustrated below in conjunction with embodiment in order fully to disclose a kind of anti-boiling and anti-freezing composite gel antibiotic film of the present invention and preparation method thereof.

Embodiment: a kind of anti-boiling and anti-freezing composite gel antibiotic film and preparation method thereof

The composition of anti-boiling and anti-freezing composite gel antibiotic film is (W/W): konjac glucomanna esterification modified product 1%, chitosan 1%, cycloheptaamylose 1%, xanthan gum 0.175% and carrageenin 1%, all the other compositions are 0.05% potassium sorbate, 0.1% sucrose ester, 0.26% stearic acid, 1% tea-polyphenol and water.

The preparation method comprises that the preparation of film liquid, heating, the centrifugal degassing, a kind of rhyme scheme in Chinese operas serving as the prelude to a complete score for voices system film, oven dry, sam ease back, take off film and finished product packing;

Film liquid preparation: earlier chitosan is added pH2.8 ± acetic acid solution in, add the aqueous solution that contains 0.05% potassium sorbate, 0.1% sucrose ester, 0.26% stearic acid and 1% tea-polyphenol after the stirring and dissolving, adjust pH is to pH10, add konjac glucomanna esterification modified product, cycloheptaamylose, xanthan gum and carrageenin again, the weight percent of each raw material and water is respectively konjac glucomanna esterification modified product 1%, chitosan 1%, cycloheptaamylose 1%, xanthan gum 0.175% and carrageenin 1%; Then, evenly stir 0.5h and be made into film liquid.

Heating: constant temperature leaves standstill 45min under 50 ℃ of conditions.

The centrifugal degassing: use the whizzer of 3000r/min, outgased 30 minutes, remove the gas that exists in the film liquid, uniform and smooth to guarantee the film of making.

A kind of rhyme scheme in Chinese operas serving as the prelude to a complete score for voices system film: select the mould that adapts by the requirement of product, the film liquid of preparation is injected in organic glassy membrane tool, scrape off excess liquid with glass rod, smear evenly, it is level and smooth to make it any surface finish.

Oven dry: in 80 ℃ baking oven, dry film forming.

Sam eases back: the film of oven dry is taken out, be put in the environment that relative humidity is 50-60%, sam 30 minutes is to guarantee the flexibility of film.

Take off film: with the film lift-off stencil.

Finished product packing: the film of peeling off is finished product by different dimensions stripping and slicing packings.

Claims (2)

1, a kind of preparation method of anti-boiling and anti-freezing composite gel antibiotic film comprises the steps:

Film liquid preparation: earlier chitosan is added pH2.8 ± acetic acid solution in, add the aqueous solution that contains 0.05% potassium sorbate, 0.1% sucrose ester and 0.26% stearic acid and 1% tea-polyphenol after the stirring and dissolving, adjust pH is to pH7.5-11, add konjac glucomanna esterification modified product, cycloheptaamylose, xanthan gum and carrageenin again, the weight percent of each raw material and water is respectively konjac glucomanna esterification modified product 0.5-1.5%, chitosan 0.5-2%, cycloheptaamylose 1-1.5%, xanthan gum 0.125-0.175% and carrageenin 0.625-1%; Then, evenly stir 0.5-1h and be made into film liquid.

Heating: constant temperature leaves standstill 40-60min under 45-55 ℃ of condition;

The centrifugal degassing: use the whizzer of 3000r/min, outgased 30 minutes;

A kind of rhyme scheme in Chinese operas serving as the prelude to a complete score for voices system film: select the mould that adapts by the requirement of product, the plural gel film liquid of above-mentioned processing is injected in the mould, scrape off excess liquid with glass rod, smear evenly, it is level and smooth to make it any surface finish;

Oven dry: in 40 ℃-80 ℃ baking oven, dry film forming;

Sam eases back: the film of oven dry taken out, is put in the environment that relative humidity is 50-60%, and sam 30-40 minute, to guarantee the flexibility of film;

Take off film: with the film lift-off stencil;

Finished product packing: the film of peeling off is finished product by different dimensions stripping and slicing packings.

2, a kind of anti-boiling and anti-freezing composite gel antibiotic film of method preparation according to claim 1.