Study On Preparation, Property And Application Of The Edible Surimi Films

The membrane edibility for packing taking the natural edibility material as raw material, such as polysaccharide, protein and so on, then increase plasticizer and crosslinking agent, forms the thin membrane through the different intermolecular interaction. The Surimi edibility membrane is take the myofibril protein and the sarcoplasm protein as the principal constituent preparation may the edible packing membrane. As early as 1995, Japanese scientist Cuq used the fish flesh mill culls the surimi to prepare edible membrane, and has studied the influence membrane characteristic influencing factor. After that, many Japanese scholars study into the edible membrane march forward the massive deep researches to the fish broom corn millet, and has made certain progress, however, to the albumin sclera's improvement and the compound membrane's preparation, there has not seen system's report, the home also be in the blank to might the table fish broom corn millet albumin sclera research.This article take Surimi as the primary data preparation,to produce albumin, first they determined through the single factor and the orthogonal test the carrier be trough glass plate for the Asian gram force; the basic craft is: Surimi + distilled water + glycerineâ†'isotropicâ†'magnetic force agitationâ†'adjusts pHâ†'the heat treatmentâ†'filtrationâ†'vacuum with the glacial acetic acid to pull out filtersâ†'paint filmâ†'room temperature laying aside 6-7hâ†'climate box dry 48h to become the membraneâ†'to uncover under the membraneâ†'58% relative humidity to be balanced 7 day of spare; When the bumen quality is 14g/100g liquid, the membrane mechanical strength and the tensile property are fine; when pH is 2.0 and 3.0, the mechanical property, anti-pulls ability to be better, but the edibility membrane's acidity is too low, so surimi is under 2.0 conditions becomes the membrane performance in pH to be the best. Along with heat treatment temperature's elevation, the albumin's steam transmissibility increases, the tensile property to reduce, and the transmittance drops, does not favor the food preservation, uses the heat treatment temperature firmly for 65℃; The thickening agent glycerine's increase is helpful to the membrane flexible enhancement, but when the recruitment is too high, it will be unavailable to taken off, the steam transmissibility elevate with the membrane mechanical strength reduces, synthesizes each kind of target analysis to obtain when the glycerine recruitment will be 50% fish broom corn millet protein content, membrane each kind of target is good. To definite surimi the superior technological conditions are: The density of the surimi is 14g/100ml, pH is 3, the heat treatment temperature is 65℃.In order to enhance the membrane the mechanical property, we increased materials reducing agent, crosslinking agent, intensifier to enhance the membrane the mechanical property, and use the membrane tensile strength, the steam transmissibility, transmittance & elongation ratio and so on took the evaluating indicator, and then determined the membrane fluid best ingredient and the allocated proportion. Crosslinking agent processing may strengthen the member once in a while the intramolecular linkage function, causes between the protein and the protein has crossing linking; When the crosslinking agent calcium chloride recruitment is 0.1g, it obviously enhance the membrane of mechanical strength and the anti- wet performance, and the degree of cross linking is fine, for the most superior recruitment; When the reducing agent Na₂SO₃ recruitment is 0.1g/100g liquid, the membrane various aspects nature is superior in other dosage; When increasing intensifier dried shark skin gelatin's membrane is thinner, and the anti-water function is good, the tensile strength and the elongation ratio also obviously better than increasing soluble starch, the pig bone glue, the agar, compared with the CMC-Na group and the control group, it may the best choise for edible membrane intensifier; When the recruitment is 0.1g/100g liquid, the WVP and TS function slightly better than control group, and the membrane elongation ratio reaches as high as 189.8% in this recruitment place value, almost the level as the large dose dried shark skin gelatin correspondence's E value difference, therefore for most superior increase dosage.To further improve the membrane application characteristic, this experiment prepared the fish broom corn millet to be possible the edible compound membrane, and through the infrared spectrum (FT-IR), the X- beam diffraction (X-RD), swept methods, surface electron microscope (SEM), DSC thermostability determination, carried on the attribute to the compound membrane's structure, simultaneously studied in the compound membrane between the various ingredients interaction and the compatibility. This article chooses Kara rubber, gellan gum, shell polyose, dried shark skin gelatin, pig bone glue and so on, takes the compound membrane the matrix, the determination result demonstrated: The fish broom corn millet - dried shark skin gelatin the structure is most compact in four groups of membranes, has formed extremely close crossing linking intermolecularly, its sectional drawing obvious pellet and the stratification, the explanation membrane has not been one kind of even dispersion system; The compound membrane's FTIR atlas with between two kind of sole membrane's atlas's change, explained in the compound membrane exists besides two sole ingredients the groups and bases, the two have taken the chemical reaction, this has proven the compound membrane and the sole membrane nature existence big difference powerfully.In order to promote the edible membrane to obtain the widespread application, this article has carried the membrane application on to two kind of attempts: first is to takes the bread surface use the membrane, another is to achievement instant noodles seasoning package of sack. The result indicated that bread after paint film processing, compares with the blank control group, the moisture content and the specific volume are relatively high, the luster is good, this explaining that the paint film can effectively reduce the aged speed, maintains the bread quality. Synthesizes several factors to consider that after the surimi - dried shark skin gelatin paint film processing bread, the quality come out to be better. The fish broom corn millet may the edible membrane take the instant noodles in seasoning package, was better than the clear plastic wrap anti- oxygen by ability, explained after the surimi increased the calcium chloride and the sodium sulfite, the structure was more compact, the degree of cross linking was higher, which enhance the storage period of adipose food; The membrane may burst in a short time, steam boiling from now on soup seasoning and the original soup seasoning will compare have a kelp fresh fragrance, will not have the obvious influence to the original flavor material; Along with laying aside time extension, instant noodles fuel oils and dehydrated vegetables after taking up water, with moisture content disappearing, finally achieves the process of water balance, thus it can be seen, the surimi protein have good anti- wet performance, may prevent the moisture content effectively the migration, and has the good moisture-proof effect to the instant noodles fuel oils and the dehydrated vegetables, thus achieves to the quality of certified level, extension shelf life goal.