CN102246998A - Safe food desiccant composition - Google Patents
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- CN102246998A CN102246998A CN2011101009211A CN201110100921A CN102246998A CN 102246998 A CN102246998 A CN 102246998A CN 2011101009211 A CN2011101009211 A CN 2011101009211A CN 201110100921 A CN201110100921 A CN 201110100921A CN 102246998 A CN102246998 A CN 102246998A
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Abstract
The invention provides a safe food desiccant composition belonging to the technical field of food desiccants. The safe food desiccant composition comprises polyacrylamide starch, corncob meal or soybean seed coats, wherein the weight ratio of the polyacrylamide starch to the corncob meal or the soybean seed coats is (1:1)-(1:9); and the polyacrylamide starch is prepared by carrying out graft copolymerization on starch and acrylamide under conditions of catalysis of ammonium persulfate and crosslinking of N,N'-methylene-bis-acrylamide. The safe food desiccant composition provided by the invention is a safe food desiccant with high moisture absorption quantity higher than the moisture absorption quantities of quick lime and silica gel; and the safe food desiccant composition causes no damage to a human body while in contact with the human body. Because the components of the safe food desiccant composition are biodegradable, the safe food desiccant composition is beneficial for environmental protection. The raw materials of the safe food desiccant composition are from side products obtained through agricultural product processing and have a wide source range, and the safe food desiccant composition has the advantages of low cost and scientific manufacturing process and can be industrially produced on a large scale.
Description
Technical field
The invention belongs to food drier technical field, be specifically related to a kind of safe desiccant composition and preparation method thereof.
Background technology
A large amount of use drier in the food processing, for example at the snow cake, in the sea sedge series products, its mainly act on be prevent food at shelf life because the moisture absorption descends mouthfeel or produces microorganism endangers.Common method is drier to be sealed in water vapour or permeable fiber product of water or the packaging film make, and its food with the easy moisture absorption is packaged in the food bag jointly, sees through the moisture that food pack enters to suck, and guarantees the drying regime of food.
Prior art, drier commonly used in the food processing has quick lime and silica gel.
The characteristics of quick lime are: low price, and material source is extensive, and wettability power is strong, under the low humidity condition (15 ~ 25%RH), still have 20 ~ 30% water absorption, the moisture absorption form is a chemical hygroscopic, does not have the phenomenon of desorb after the moisture absorption.In the process of firing, there is a large amount of waste gas to produce, consume a large amount of electric energy, cause environmental pollution, and because quick lime is when moisture absorption and the exothermic reaction that takes place of water, in case so the esophagus of quick lime and human body or eye contact will with the reaction of moisture in esophagus or the eyes, and the heat that produces will be burnt human body, therefore use the quick lime class also often to receive consumer's complaint as the food company of drier, because children often think the sack of drier by mistake the edible part, after tearing with tooth, cause splashing of quick lime, thereby cause burning of its esophagus or eyes.The solution that often adopts of food enterprise is the intensity that increases parcel quick lime packaging material for this reason, makes it be difficult for being torn, and packing cost is significantly increased.
[0005] characteristics of [0005] silica gel are: under high humidity, its hygroscopic capacity is 30% of its total amount, but the wettability power in the low humidity condition is not strong, and because its moisture absorption is the physics moisture absorption, after moisture absorption, have and separate suction phenomenon, and because its source is limited, the processing technology complexity, its cost will be higher than quick lime far away, it is used and popularization is very restricted.
Summary of the invention
The objective of the invention is to overcome the above-mentioned defective of prior art food desiccant, provide the contact of a kind of human body not have injury, use that material source is extensive, water absorbing capacity strong, can guarantee the desiccant composition of food in the shelf life drying.
For reaching goal of the invention the technical solution used in the present invention be:
A kind of safe food desiccant composition, it is characterized in that comprising polyacrylamide starch, maize cob meal or soybean peel, the weight ratio of its polyacrylamide starch and maize cob meal or soybean peel is 1:1～1:9, polyacrylamide starch be starch and acrylamide at the catalysis and the N of ammonium persulfate, carry out the made acrylamide starch solution of graft copolymerization under the crosslinked condition of N '-methylene-bisacrylamide.
Further, described polyacrylamide starch is cornstarch and acrylamide catalysis and the N at ammonium persulfate, and it is made to carry out graft copolymerization under the crosslinked condition of N '-methylene-bisacrylamide.
The present invention forms edible drier with Biodegradable material by graft copolymerization and mixing, this drier is to the injury of human body contact nothing, prove that by experiment its water absorbing capacity is strong, can guarantee food required humidity requirement in shelf life, the use material source is extensive, and, can promote the development of deep processing of farm products with the byproduct comprehensive utilization that agricultural processes raw material.
The present invention also provides this desiccant composition preparation method, and preparation process is as follows:
(1) preparation of acrylamide starch solution: starch adds water and makes 10～15% starch solution, be incorporated as the N of starch weight 0.5～1.0% under 40 ℃～80 ℃ stirrings, N '-methylene-bisacrylamide, add the ammonium persulfate of starch weight 2%～3% and the acrylic acid of 1 ~ 3 times of cornstarch weight, regulate PH=7.0, react and obtain the polyacrylamide starch solution after 2～6 hours;
(2) with maize cob meal or pulverize the soybean peel of crossing 100 mesh sieves in the back and add in the acrylamide starch solution by 1～9 times of weight of acrylamide starch solution and mix, the mixture that obtains after the mixing 100～110 ℃ of dryings 1 ~ 3 hour promptly.
Described N, N '-methylene-bisacrylamide addition is 0.9% of a cornstarch weight.
Described ammonium persulfate addition is 2.5% of a cornstarch weight.
Described acrylic acid addition is 2 times of cornstarch weight.
Further, the drying composite that step (2) obtains mixes with dolomol, develops at a high speed full-automatic tablet press machine, and dolomol weight is 1% of starch consumption.
All right and a small amount of quick lime of desiccant composition of the present invention and natural crystal be compressing tablet together, makes the drier of high moisture absorption.
The present invention also provides a kind of permeable membrane packing material that is packaged with desiccant composition, wherein desiccant composition comprises polyacrylamide starch, maize cob meal or soybean peel, the weight ratio of its polyacrylamide starch and maize cob meal or soybean peel is 1:1～1:9, polyacrylamide starch be starch and acrylamide at the catalysis and the N of ammonium persulfate, carry out the made acrylamide starch solution of graft copolymerization under the crosslinked condition of N '-methylene-bisacrylamide.
China is large agricultural country, year corn yield 1.1～1.3 hundred million ton, the about 2,000 ten thousand tons of corncobs of by-product.Corncob is as a kind of agricultural wastes, and once the overwhelming majority can only be used as farmers''s fuel.And maize cob meal has that to have a surface area big, the characteristics of high adsorption capacity.Soybean peel also has same characteristics.
The present invention mixes maize cob meal and polyacrylamide starch, it is strong to give full play to polyacrylamide starch hygroscopicity, maize cob meal is big as carrier surface area, the characteristics that moisture sorption effect is good, the product that makes this invention has good machine-shaping ability again, wide material sources when having very strong wettability power, enormous amount is convenient to suitability for industrialized production.The twice laid of maize cob meal and these class agricultural wastes of soybean peel has simultaneously improved additional value of farm products again greatly, has promoted the development of deep processing of farm products, has good social effect and economic implications.
Drier of the present invention compared to existing technology, its beneficial effect is:
(1) the present invention is the food desiccant of safety, can not come to harm even child eats by mistake, shows through standard acute oral toxicity result of the test: polyacrylamide starch safety non-toxic (MTD〉2000mg/kgBW).
(2) because Main Ingredients and Appearance is modified starch or maize cob meal, soybean peel, help environmental protection, biodegradable.
(3) acrylamide solution and maize cob meal fully mix, drying, the hygroscopicity height, can the weight of moisture absorption own 30 ~ 50%.
(4) maize cob meal that uses is as the byproduct of cornstarch processing, and is with low cost.
(5) shape of desiccant composition of the present invention and hardness can meet a large amount of suitability for industrialized production and food processing instructions for use.
The specific embodiment
Come the present invention is further specified below in conjunction with specific embodiment, but do not limit the invention to these specific embodiment.One skilled in the art would recognize that the present invention contained in claims scope all alternatives, improvement project and the equivalents that may comprise.
Embodiment 1:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
Polyacrylamide cornstarch manufacture craft:
Cornstarch adds and stirs into corn starch solution in the entry, do not stop under the stirring condition at 60 ℃, the N that adds starch weight 0.9%, N '-methylene-bisacrylamide, the ammonium persulfate that adds cornstarch weight 2.5%, the acrylic acid of 2 times of cornstarch weight and NaOH neutralization solution (PH=7.0) react and obtain the polyacrylamide corn starch solution after 4 hours.
With polyacrylamide corn starch solution and maize cob meal or pulverize the mixture that obtains after the soybean peel of crossing 100 mesh sieves in the back mixes according to 1:1,110 ℃ of dryings 2 hours.
The drying composite that obtains, mix with 1% dolomol, on at a high speed full-automatic tablet press machine, it is little to be developed into volume, have certain degree of hardness, be convenient to packaged products, polyacrylamide cornstarch weight content is 30% of a gross weight in this product, the maize cob meal weight content is 69% of a gross weight, and the dolomol weight content is 1% of a gross weight.
The said goods is carried out hygroscopic capacity to be measured: the drier of making is taken by weighing constant weight, in placement and the climatic chamber, every other day measure weight one time.
Hygroscopic capacity %=(X2-X1)/X1*100
X2: the weight g after the moisture absorption;
X1: drier is not put into the weight g before the climatic chamber;
Record:
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 30%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 50%.
Embodiment 2:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the acrylamide corn starch solution after 4 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:2, the mixture that obtains after the mixing is at 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, weight percent content in the desiccant composition is as follows: the polyacrylamide cornstarch is 20%, maize cob meal is 79%, and dolomol is 1%.
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 25%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 40%.
Embodiment 3:
Cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 40 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the polyacrylamide corn starch solution after 6 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:3, and 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate are promptly.Each weight percent content is in this drier: polyacrylamide cornstarch 15%, maize cob meal 84%, dolomol 1%.
Through testing:
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 22%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 35%.
Embodiment 4:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 80 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid, regulate PH=7.0 with NaOH, react and obtain the polyacrylamide corn starch solution after 2.5 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:4, and 105 ℃ of dryings 3 hours and 1% dolomol mixed pressuring plate are promptly.Gained drier each component weight percentage: polyacrylamide cornstarch 10%, maize cob meal 89%, dolomol 1%.
After testing:
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 20%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 30%.
Embodiment 5:
Cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g,
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 70 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the polyacrylamide corn starch solution after 2 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:1,110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, gained drier each component weight percentage: polyacrylamide cornstarch 30%, maize cob meal 69%, dolomol 1%.
Through detecting present embodiment gained drier:
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 15%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 30%.
Embodiment 6:
Cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the polyacrylamide corn starch solution after 3 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:1,110 ℃ of dryings 2 hours, with 1% dolomol mixed pressuring plate, polyacrylamide cornstarch 30% in this drier, maize cob meal 69%, dolomol 1%, gained drier each component weight percentage: polyacrylamide cornstarch 30%, maize cob meal 69%, dolomol 1%.
After testing:
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 22%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 33%.
Embodiment 7:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the polyacrylamide corn starch solution after 4 hours;
(2) polyacrylamide corn starch solution and soybean peel mix by weight 1:1,110 ℃ of dryings 2 hours, with 1% dolomol mixed pressuring plate, polyacrylamide cornstarch 30% in this drier, maize cob meal 69%, dolomol 1%, gained drier each component weight percentage: polyacrylamide cornstarch 30%, soybean peel 69%, dolomol 1%.
After testing:
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 23%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 43%.
Embodiment 8:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the polyacrylamide corn starch solution after 4 hours;
(2) polyacrylamide corn starch solution and soybean peel mix by weight 1:2,110 ℃ of dryings 2 hours, with 1% dolomol mixed pressuring plate, polyacrylamide cornstarch 30% in this drier, maize cob meal 69%, dolomol 1%, gained drier each component weight percentage: polyacrylamide cornstarch 20%, soybean peel 79%, dolomol 1%.
After testing:
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 20%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 37%
Embodiment 9:
Raw material is: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the polyacrylamide corn starch solution after 4 hours;
(2) polyacrylamide corn starch solution and soybean peel mix by weight 1:3,110 ℃ of dryings 2 hours, with 1% dolomol mixed pressuring plate, polyacrylamide cornstarch 30% in this drier, maize cob meal 69%, dolomol 1%, gained drier each component weight percentage: polyacrylamide cornstarch 15%, soybean peel 84%, dolomol 1%.
After testing:
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 15%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 30%
Embodiment 10:
Cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g, 60 ℃
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 80 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the polyacrylamide corn starch solution after 2 hours;
(2) polyacrylamide corn starch solution and soybean peel mix by weight 1:4,110 ℃ of dryings 2 hours, with 1% dolomol mixed pressuring plate, polyacrylamide cornstarch 30% in this drier, maize cob meal 69%, dolomol 1%, gained drier each component weight percentage: polyacrylamide cornstarch 10%, soybean peel 89%, dolomol 1%.
After testing:
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 13%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 28%.
Embodiment 11:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the acrylamide corn starch solution after 4 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:5, the mixture that obtains after the mixing is at 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, weight percent content in the desiccant composition is as follows: the polyacrylamide cornstarch is 20%, maize cob meal is 79%, and dolomol is 1%.
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 22%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 36%.
Embodiment 12:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the acrylamide corn starch solution after 4 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:6, the mixture that obtains after the mixing is at 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, weight percent content in the desiccant composition is as follows: the polyacrylamide cornstarch is 20%, maize cob meal is 79%, and dolomol is 1%.
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 21%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 34%.
Embodiment 13:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the acrylamide corn starch solution after 4 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:7, the mixture that obtains after the mixing is at 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, weight percent content in the desiccant composition is as follows: the polyacrylamide cornstarch is 20%, maize cob meal is 79%, and dolomol is 1%.
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 20%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 32%.
Embodiment 14:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the acrylamide corn starch solution after 4 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:8, the mixture that obtains after the mixing is at 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, weight percent content in the desiccant composition is as follows: the polyacrylamide cornstarch is 20%, maize cob meal is 79%, and dolomol is 1%.
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 18%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 30%.
Embodiment 15:
Raw material: cornstarch 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide cornstarch: cornstarch adds water and makes corn starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain the acrylamide corn starch solution after 4 hours;
(2) polyacrylamide corn starch solution and maize cob meal mix by weight 1:9, the mixture that obtains after the mixing is at 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, weight percent content in the desiccant composition is as follows: the polyacrylamide cornstarch is 20%, maize cob meal is 79%, and dolomol is 1%.
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 15%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 29%.
Embodiment 16:
Raw material: farina 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide farina: farina adds water and makes potato starch solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid, regulate PH=7.0 with NaOH, react and obtain the acrylamide potato starch solution after 4 hours;
(2) polyacrylamide potato starch solution and maize cob meal mix by weight 1:2, the mixture that obtains after the mixing is at 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, weight percent content in the desiccant composition is as follows: the polyacrylamide farina is 20%, maize cob meal is 79%, and dolomol is 1%.
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 25%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 40%.
Embodiment 17:
Raw material: tapioca 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide tapioca: tapioca adds water and makes tapioca solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain acrylamide tapioca solution after 4 hours;
(2) polyacrylamide tapioca solution and maize cob meal mix by weight 1:2, the mixture that obtains after the mixing is at 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, weight percent content in the desiccant composition is as follows: the polyacrylamide tapioca is 20%, maize cob meal is 79%, and dolomol is 1%.
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 22%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 38%.
Embodiment 18:
Raw material: starch from sweet potato 100g, water 666g, acrylic acid 200g, NaOH 200g, ammonium persulfate 2.5g, N, N '-methylene-bisacrylamide 0.85g.
(1) preparation of polyacrylamide starch from sweet potato: starch from sweet potato adds water and makes starch from sweet potato solution, 60 ℃ of stirrings add N down, N '-methylene-bisacrylamide, ammonium persulfate and acrylic acid are regulated PH=7.0 with NaOH, react to obtain acrylamide starch from sweet potato solution after 4 hours;
(2) polyacrylamide starch from sweet potato solution and maize cob meal mix by weight 1:2, the mixture that obtains after the mixing is at 110 ℃ of dryings 2 hours and 1% dolomol mixed pressuring plate, weight percent content in the desiccant composition is as follows: the polyacrylamide starch from sweet potato is 20%, maize cob meal is 79%, and dolomol is 1%.
At 25 ℃, under the RH=25% situation: 14 days, hygroscopic capacity was 22%.
At 25 ℃, under the RH=90% situation: 14 days, hygroscopic capacity was 40%.
Claims (8)
1. the food desiccant composition of a safety, it is characterized in that comprising polyacrylamide starch, maize cob meal or soybean peel, the weight ratio of polyacrylamide starch and maize cob meal or soybean peel is 1:1～1:9, polyacrylamide starch is starch and acrylamide catalysis and the N at ammonium persulfate, and it is made to carry out graft copolymerization under the crosslinked condition of N '-methylene-bisacrylamide.
2. safe according to claim 1 food desiccant composition, it is characterized in that described polyacrylamide starch is cornstarch and acrylamide catalysis and the N at ammonium persulfate, it is made to carry out graft copolymerization under the crosslinked condition of N '-methylene-bisacrylamide.
3. safe according to claim 1 food desiccant composition is characterized in that preparation process is as follows:
(1) preparation of polyacrylamide starch: starch adds water and makes 10～15% starch solution, be incorporated as the N of starch weight 0.5～1.0% under 40 ℃～80 ℃ stirrings, N '-methylene-bisacrylamide, add the ammonium persulfate of starch weight 2%～3% and the acrylic acid of 1 ~ 3 times of starch weight, regulate PH=7.0 with NaOH, react and obtain the polyacrylamide starch solution after 2～6 hours;
(2) with maize cob meal or pulverize the soybean peel of crossing 60 ~ 100 mesh sieves in the back and add in the acrylamide starch solution by 1～9 times of weight of polyacrylamide starch solution and mix, the mixture that obtains after the mixing 100～110 ℃ of dryings 1 ~ 3 hour promptly.
4. as safe food desiccant preparation method of composition as described in the claim 3, it is characterized in that N, N '-methylene-bisacrylamide addition is 0.9% of a starch weight.
5. as safe food desiccant composition as described in the claim 4, it is characterized in that the ammonium persulfate addition is 2.5% of a starch weight.
6. as safe food desiccant composition as described in the claim 5, it is characterized in that the acrylic acid addition is 2 times of starch weight.
7. as safe food desiccant composition as described in the claim 3, it is characterized in that the drying composite that step (2) obtains, mix that developing, dolomol weight is 1% of starch consumption at a high speed full-automatic tablet press machine with dolomol.
8. permeable membrane packing material that is packaged with desiccant composition, wherein desiccant composition comprises polyacrylamide starch, maize cob meal or soybean peel, the weight ratio of its polyacrylamide starch and maize cob meal or soybean peel is 1:1～1:9, polyacrylamide starch be starch and acrylamide at the catalysis and the N of ammonium persulfate, carry out the made acrylamide starch solution of graft copolymerization under the crosslinked condition of N '-methylene-bisacrylamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101009211A CN102246998A (en) | 2010-06-02 | 2011-04-21 | Safe food desiccant composition |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010189680.8 | 2010-06-02 | ||
| CN201010189680 | 2010-06-02 | ||
| CN2011101009211A CN102246998A (en) | 2010-06-02 | 2011-04-21 | Safe food desiccant composition |
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| CN107173665A (en) * | 2017-06-02 | 2017-09-19 | 陶圣香 | A kind of preparation method of food special drying agent |
| CN107469585A (en) * | 2017-10-16 | 2017-12-15 | 王天石 | A kind of environmentally friendly drier and preparation method thereof |
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| CN102600705A (en) * | 2012-04-10 | 2012-07-25 | 福建省中医药研究院 | Edible plant dryer |
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| CN103041691A (en) * | 2012-09-07 | 2013-04-17 | 赵立地 | Drying agent composition |
| CN105054218A (en) * | 2015-08-30 | 2015-11-18 | 陈爱梅 | Preparation method for food desiccant |
| CN105054218B (en) * | 2015-08-30 | 2018-11-06 | 陈林 | A kind of preparation method of food drier |
| CN106334545A (en) * | 2016-08-29 | 2017-01-18 | 宁波江东甬风工业设计有限公司 | Preparation method of safe granular food drying agent |
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| CN107173665A (en) * | 2017-06-02 | 2017-09-19 | 陶圣香 | A kind of preparation method of food special drying agent |
| CN107469585A (en) * | 2017-10-16 | 2017-12-15 | 王天石 | A kind of environmentally friendly drier and preparation method thereof |
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Application publication date: 20111123 |