CN104262689B - A kind of stable starch base film-forming composition - Google Patents
A kind of stable starch base film-forming composition Download PDFInfo
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- CN104262689B CN104262689B CN201410512202.4A CN201410512202A CN104262689B CN 104262689 B CN104262689 B CN 104262689B CN 201410512202 A CN201410512202 A CN 201410512202A CN 104262689 B CN104262689 B CN 104262689B
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Abstract
The invention discloses a kind of stable starch base film-forming composition, form including natural amylose, natural amylopectin, modified starch and reinforcing agent, moisture retention is good, it is aging to be difficult to, the advantage of good-toughness to use the starch film made of said composition to have.
Description
Technical field
The present invention relates to a kind of stable starch base film-forming composition, belong to starch and starch derivatives deep processing neck
Territory.
Background technology
Natural or modified starch is usually used in food or medicine processing industry.By to the physics of native starch, chemical modification,
It is made to possess the characteristic not available for ative starch, as improve mobility, water solublity, film property, mechanical strength etc..
Natural plant starch is divided into amylopectin and the big class of amylose two from structure.Amylose is D-Glucose base
The polysaccharide chain connected with α-(Isosorbide-5-Nitrae) glycosidic bond, has about 200 glucosyl groups, molecular weight 1～2 × 10 in molecule5, the degree of polymerization
990, space conformation is curled into spiral type, and every single-revolution is 6 glucosyl groups.Except there being α-(Isosorbide-5-Nitrae) glucosides in branched amylopectin molecules
Outside the sugar chain of key, the branch that also α-(1,6) glycosidic bond connects, containing 300～400 glucosyl groups in molecule, molecular weight > 2 ×
107, the degree of polymerization 7200, each branch is the most all to be curled into spiral type.Although amylopectin and amylose basic component units phase
With, but due to the difference of the two structure, the physical and chemical performance shown is the most different: starch and iodine are color reaction, directly
Chain starch is blue, and amylopectin is bronzing；The filming performance of amylose is good, and toughness is relatively strong, can be dissolved in water, adds alcohol
Can separate out Deng then, but adhesiveness, stability and water holding capacity are the best；The viscosity of amylopectin is high, swelling and insoluble in water,
Can form stable glue, after amylopectin Heat Gelatinization, the chain in molecule is the loosest, therefore has higher viscosity.When
During gelatinized corn starch cooling, the branched structure in branched amylopectin molecules reduces again the tightness degree that strand recombines, shows
Preferably ageing resistance.But amylopectin shear-stable less stable, under shear action, starch chain is destroyed, performance
Declining for viscosity, moisture holding capacity weakens.In the prior art, for ensureing processing and mechanical performance, the starch material of film forming purposes of film
Material is all with amylose as main component, and the problem brought film water holding capacity just is the best.
Modified starch is then on the basis of native starch, uses the physically or chemically means molecular structure or micro-to starch
Sight crystal formation is changed.Common modified starch has esterification starch, Oxytarch, etherification starch, thermal denaturation starch etc..By starch
On hydroxyl with ester group, alkoxyl etc. replace, the interaction force between hydrophilic or the starch chain of starch can be changed, be allowed to
It is endowed new character and new application.In prior art, the consumption of modified starch is the highest, and some technology directly make
With the modified starch of a certain type, if hydroxypropyl starch is as the main component of starch film-forming composition, but entirety is carried by this
The high cost of material.
Prior art is in starch film or the research of modified starch film, mainly for the masking of mixing starch, tabletting, bonding etc.
Aspect is launched, by the ratio of regulation amylopectin and amylose to obtain the satisfactory mixture of performance.But existing shallow lake
The water holding capacity of powder membrane material is the best, it is easy to dehydration becomes fragile, and have impact on stability and the film institute contents of parcel thing of film
Stability, limit the application of starch film material.
It addition, the thermosetting process technology of starch becomes nearest research hot topic, thermosetting processing is by starch and other raw materials
Send in the screw extruder of similar plastics processing, by mechanisms such as the kneading of screw rod, shearings in extruder, starch is entered
Row modification.This technology needs to carry out at a higher temperature, generally at 100-150 DEG C, adds and easilys lead to starch degradation man-hour,
Side reaction is more, causes the ruggedness of product to decline, simultaneously bigger to the Control of Impurities difficulty of product.
Summary of the invention
It is an object of the invention to, it is provided that a kind of stable starch film-forming composition, use this film-forming composition through logical
The starch film that often masking way obtains has good machining property, stability and water-retaining property, overcomes in prior art and forms sediment
The defect that powder base film moisture retention in dry conditions is the best and the most aging.Can solve the problem that the problem that prior art exists.With
Time, this starch film-forming composition is especially suitable for thermosetting processing, and using this starch film-forming composition to carry out thermosetting processing can also be big
Temperature needed for width reduction, reduces the incidence rate of the side reactions such as starch degradation, improves the machine of the starch film of thermosetting machine-shaping
Tool performance.
A kind of stable starch film-forming composition of the present invention is by including that natural amylose, natural side chain form sediment
Powder, modified starch and reinforcing agent composition, it is characterised in that natural amylose is 1-with the mass ratio of natural amylopectin
3.5:1, modified starch accounts for the 1%-10% of compositions gross weight, and reinforcing agent accounts for the 0.5%-5% of compositions gross weight.
Described natural amylose is straight chain corn starch, straight chain pea starch；Natural amylopectin is selected from side chain wood
Sweet potato starch, amylopectin-potato starch, side chain glutinous rice starch.
Described reinforcing agent is in glycerol, sorbitol, carboxymethyl cellulose, micropowder silica gel, microcrystalline Cellulose, sodium alginate
One or more mixture.
Further, described reinforcing agent by weight percentage, by glycerol 10%-15%, carboxymethyl cellulose 20-35%, sea
Sodium alginate 5%-15%, micropowder silica gel 40-55%, microcrystalline Cellulose 10-25% form.
Described modified starch is the one in etherification starch, Oxytarch, esterification starch, nanometer starch crystal.
Further, described modified starch is etherification starch, the one in hydroxypropyl starch, hetastarch.
Further, described modified starch can also be esterification starch, selected from phosphate ester starch, acetate starch, sulphuric acid
One in ester starch.
Further, described modified starch can also be esterification starch, selected from phosphate ester starch, acetate starch, sulphuric acid
One in ester starch.
Starch film-forming composition of the present invention, the film made has good machining property, stability and guarantor
Aqueous.Raw materials used kind and consumption all determine through great many of experiments.
Amylopectin and amylose mixing constitute the substrate of compositions, and its ratio changes in the range of described can be adjusted
The joint film property of compositions, viscosity, but but cannot improve its water-retaining property and ruggedness；
Micropowder silica gel can help to destroy the crystal region of amylose in preparation, improves its gelatinizing ability, reduces brittleness,
Improve the elongation at break of masking, ruggedness and the ageing resistance of membrane material can be improved in thermosetting is processed；
Glycerol or sorbitol, as wetting agent, improve the moisture retention that compositions is overall, can improve the molding of compositions simultaneously
Plasticity；
Carboxymethyl cellulose described compositions be dissolved in water be glue time, play the effect that glue is stable, in addition carboxymethyl
Cellulose, when described compositions carries out thermosetting processing film forming, can improve material transparent degree the most unexpectedly, reduce the bubble rate of film
And eyelet；
The water holding capacity of sodium alginate energy enhancing composition, in the case of especially collaborative with glycerol or sorbitol use,
Thermosetting adds the dispersing uniformity of starch in man-hour, improves film property, the most certain effect helping the starch film demoulding；
Modified starch can give film certain functional, is allowed to possess the application power at special dimension, as added esterification
Starch can improve the acid resistance of film, adds etherification starch and can increase film dissolution velocity in water, adds Oxytarch and can enter
One step improves the ageing resistance of film；In the present invention, only need to add minimal amount of modified starch and i.e. can reach imparting starch film function
The problem of property so that production cost is effectively controlled.
Microcrystalline Cellulose can improve the toughness of film, can reduce processing temperature the most unexpectedly, be allowed to more in hot-working
Extrusion is completed in the case of gentleness.
The method that the invention further relates to use starch film-forming composition of the present invention to produce starch film.
The present invention relates to the production method of a kind of starch film, can be with appointing by the aqueous solution of described film-forming composition
What known means is coated in flat surface or the face of cylinder of rigid solid thing, such as fluid bed, is stained with plastic pin etc..Concrete is permissible
It is: use the aqueous solution containing solid film-forming composition 15-25% mass component, be heated to 45-55 DEG C and be incubated, preheating quilt afterwards
It, to 50-60 DEG C, is contacted by the rigid solid thing of coating afterwards with aqueous solution, shapes, dries, the demoulding i.e. obtains described starch film.
The invention further relates to the production method of a kind of starch film, specifically a kind of thermosetting processing method, use extruder
Starch denaturalization is made after described starch film-forming composition is extruded at a certain temperature, mediated.Starch of the present invention is used to become
Film composition, can make hot worked temperature lower than ordinary temperature, it is only necessary to the processing temperature less than 80 DEG C, and this is existing skill
Art can not reach.
Starch film-forming composition of the present invention may be used for making the film of starch base, and this starch basement membrane can be used for manufacturing
Directly contact the interior packaging material of medicine, such as packaging bag, pack case, packing box etc.；This starch basement membrane can be used for manufacturing solid preparation
Coating.Furthermore it is also possible to use the film-forming composition of the present invention to produce ebonite with any of means and conventional equipment
Capsule, as being stained with glue method；The film-forming composition of the present invention can be used to produce soft capsule with any of means and conventional equipment,
Such as rotary die process, drop pill method, squeezing and pressing method etc..
The beneficial effects of the present invention is:
1, a kind of stable starch film-forming composition is provided, it is possible to for preparing the shallow lake that water-retaining property is good, film toughness is good
Powder basement membrane, this film can have a wide range of applications in food, medicine and daily use chemicals.
2, provide the method using described starch film-forming composition to manufacture starch film, especially reduce thermosetting processing skill
The temperature of art.
Detailed description of the invention
The present invention is further illustrated, it should be noted that all of embodiment is only side below by way of several embodiments
Assistant solves present disclosure, not any type of to the present invention further restriction.Those skilled in the art are according to arbitrary reality
The mode of executing carries out limited improvement also should be within the scope of the present invention.
Embodiment 1
Straight chain corn starch 45kg
Amylopectin-tapioca starch 40kg
Hydroxypropyl starch 10kg
Reinforcing agent 5kg, including:
Glycerol 0.5kg；
Carboxymethyl cellulose 1kg；
Micropowder silica gel 2kg；
Microcrystalline Cellulose 1.25kg；
Sodium alginate 0.75kg；
Said components is placed in dismembyator ground and mixed and get final product.
Prepared compositions being mixed with water and be made into glue, being allowed to 25 DEG C of viscosity is between 500-750mPa s, is preheated to
55 DEG C, the preheating of automatic film coating machine, is coated on glue on flat board simultaneously, and THICKNESS CONTROL is at 0.5mm, and drying prepares forms sediment
Powder film.
Embodiment 2
Straight chain pea starch 70kg
Side chain glutinous rice starch 20kg
Starch sulfate 5kg
Reinforcing agent 5kg, including:
Glycerol 1.5kg；
Carboxymethyl cellulose 0.3kg；
Micropowder silica gel 2.5kg；
Microcrystalline Cellulose 0.5kg；
Sodium alginate 0.2kg；
Said components is placed in dismembyator ground and mixed and get final product.
The mixture obtained is sent into double screw extruder, in 50-80 DEG C of temperature range, is extruded into the thin film of 0.5mm,
Through air-drying and get final product.
Embodiment 3
Straight chain pea starch 62kg
Side chain glutinous rice starch 30kg
Oxytarch 1.5kg
Nanometer starch crystal 1.5kg
Reinforcing agent 5kg, including:
Sorbitol 0.75kg；
Carboxymethyl cellulose 1.35kg；
Micropowder silica gel 1.4kg；
Microcrystalline Cellulose 1.25kg；
Sodium alginate 0.25kg；
The mixture obtained is sent into double screw extruder, in 50-80 DEG C of temperature range, is extruded into the thin film of 0.5mm,
Through air-drying and get final product.
Comparative example 1
Carry out according to embodiment 2 formula 1 in patent CN 1882317 B.
The experiment of embodiment 4 moisture retention and elongation at break are tested
The starch film sample of Example 1-3, weighs, and with karl Fischer moisture tester testing moisture, and measures fracture
Percentage elongation.Be placed in 25 DEG C of exsiccators placement, in 1d, 3d, 7d, 30d take out, testing moisture and elongation at break at once,
Result is as follows:
Table 1 moisture measurement result
| Sequence number | Before placement | 1d | 3d | 7d | 30d |
| Embodiment 1 | 10.0% | 9.6% | 9.5% | 9.5% | 9.4% |
| Embodiment 2 | 11.1% | 10.7% | 10.6% | 10.4% | 10.3% |
| Embodiment 3 | 8.9% | 8.6% | 8.5% | 8.5% | 8.4% |
| Comparative example 1 | 18.3% | 10.4% | 8.1% | 4.5% | 2.6% |
Table 2 elongation at break test result
| Sequence number | Before placement | 1d | 3d | 7d | 30d |
| Embodiment 1 | 22.5% | 22.5% | 22.3% | 21.8% | 21.6% |
| Embodiment 2 | 20.3% | 20.1% | 19.8% | 19.8% | 19.7% |
| Embodiment 3 | 24.6% | 24,3% | 24.2% | 23,9% | 23.7% |
| Comparative example 1 | 21.5% | 16.1% | 10.6% | 5.6% | 2.2% |
As can be seen here, the film that starch composites provided by the present invention is made has excellent performance of keeping humidity, and is being dried
Placing for a long time under environment, the performance of film is the most relatively stable.
Claims (9)
1. a stable starch base film-forming composition, including natural amylose, natural amylopectin, modified starch and increasing
Strong agent composition, it is characterised in that natural amylose is 1-3.5:1 with the mass ratio of natural amylopectin, and modified starch accounts for group
The 1%-10% of compound gross weight, reinforcing agent accounts for the 0.5%-5% of compositions gross weight；
Described reinforcing agent by weight percentage, by glycerol 10%-15%, carboxymethyl cellulose 20-35%, sodium alginate 5%-
15%, micropowder silica gel 40-55%, microcrystalline Cellulose 10-25% composition.
Compositions the most according to claim 1, it is characterised in that natural amylose is straight chain corn starch, straight chain pea
Bean starch；Natural amylopectin is selected from amylopectin-tapioca starch, amylopectin-potato starch, side chain glutinous rice starch.
Compositions the most according to claim 1, it is characterised in that described modified starch is etherification starch, Oxytarch, ester
Change the one in starch, nanometer starch crystal or combination.
Compositions the most according to claim 3, it is characterised in that described etherification starch is selected from hydroxypropyl starch, ethoxy
One in starch.
Compositions the most according to claim 3, it is characterised in that described esterification starch is selected from phosphate ester starch, acetate
One in starch, starch sulfate.
Compositions the most according to claim 1, also include food or the acceptable opacifier of pharmaceutical field, odor mask and
Coloring agent, and the gross mass of these additives is less than the 2% of total composition.
7., according to the compositions described in claim 1-6 any one, also include at least one pharmaceutically active substance.
8. a preparation method for inhibited starch film, including the starch film forming described in the claim 1-7 any one that will provide
The aqueous solution of compositions, is coated in solids flat surface or the column surface of rigidity, and drying obtains described stable shallow lake
Powder film.
9. a preparation method for inhibited starch film, including the starch film forming described in the claim 1-7 any one that will provide
After the ground mixing of compositions, sending into extruder and carry out conventional thermosetting extrusion processing, described inhibited starch film is made in cooling.
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| CN106428997A (en) * | 2016-07-12 | 2017-02-22 | 吉林农业大学 | Method using edible starch matrix membrane to pack honey |
| CN106496653A (en) * | 2016-11-28 | 2017-03-15 | 青岛中科星淀新材料科技有限公司 | A kind of preparation method of hydroxypropul starch/sodium alginate composite membrane |
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| JP4630202B2 (en) * | 2006-02-15 | 2011-02-09 | 株式会社クラレ | Amylose film for polarizing film |
| CN101245157B (en) * | 2007-02-17 | 2011-06-15 | 长春大成特用玉米变性淀粉开发有限公司 | Film-forming agent composition and starchiness vegetable adhesive containing the composition |
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