CN1285376A - Process for preparation of water-proof and heat-resistant plastic soybean protein film - Google Patents
Process for preparation of water-proof and heat-resistant plastic soybean protein film Download PDFInfo
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- CN1285376A CN1285376A CN 00116036 CN00116036A CN1285376A CN 1285376 A CN1285376 A CN 1285376A CN 00116036 CN00116036 CN 00116036 CN 00116036 A CN00116036 A CN 00116036A CN 1285376 A CN1285376 A CN 1285376A
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Abstract
The preparation method for soybean protein film includes the following steps; using commerlially available soybean mill run protein extract, classifying, mixing it with glycerine and hot-pressing so as to obtain the invented finished product. Said thermoplastic film is non-toxic, edible, transparent, cold-resistant, boiling water resistant and resistant to vacuum extraction, its strength and extensibility are 5.5 MPa and 140% respectively, and its production process is simple and cost is low, its production process has no pollution, it can be used as food packaging and biodegradable material.
Description
The present invention relates to a kind of preparation method of water-proof and heat-resistant plastic soybean protein film, it is the functional materials that makes with the soybean protein in the soybean residue, belongs to field of polymer technology.
Owing to consuming day by day and serious environmental pollution that the nondegradation of synthetic materials causes of Nonrenewable resources, reproducible environment-friendly material is more and more noticeable.Emerging " industrial protein plastics " belong to this type of, and it is nontoxic to environment, are expected to substitute some petroleum chemicals.Soybean protein isolate is to separate from the by product after the soybean residue oil refining, accounts for 50% (w/w) of soybean residue, and the natural polymer of forming by multiple amino acids (Whitaker, J.R.Food proteins.1977, p498.).Soybean residue is generally as animal-feed, and soybean protein isolate then can be used for food and tackiness agent industry (J.Japanese Soc.Food Sci.and Tech.1995,42 (9), 672; J.Amer.Oil Chem.Soc.2000,77,101.).Adopt the soybean protein film of casting method preparation with high costs, the energy consumption height, fragility is big, and winter hardiness is poor, and can not thermoplastic, and practicality is restricted (J.Amer.Oil Chem.Soc.1994,71 (11), 1281).Heating the plasticity protein film or the soybean protein sheet material does not appear in the newspapers at home as yet with pressure sintering, abroad also is just appeared in the newspapers in recent years (Ind.Eng.Chem.Res.1994,33 (7), 1821; J.Polym.Eng.1999,19 (6), 383).In these reports, the water tolerance of plastic soybean protein film, especially hot water resistance is still not high enough.
The novel preparation method that the purpose of this invention is to provide a kind of water-proof and heat-resistant plastic soybean protein film material.This method makes full use of this inexpensive renewable resource of soybean protein, with simply, method makes fast.This thermoplastic materials has nontoxic, edible, anti-boiling water, low cost, cold-resistant, vacuum-resistant extracting, transparent.This mould material degradable, pollution-free in raw material leaching process and the production process, energy consumption is low, helps environmental protection, and is especially significant for solving the moulding problem that runs in the natural macromolecular material preparation process.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of preparation method of water-proof and heat-resistant plastic soybean protein film: soybean protein powder is added 0.4-0.7 glycerine doubly, after the co-blended 30 minutes, at 100-180 ℃, hot pressing under the 5-20 Mpa, be chilled to 60-80 ℃ after 20 minutes, promptly get the water-proof and heat-resistant plastic soybean protein film of golden transparent.
According to technical scheme of the present invention, described soybean protein powder is to prepare as follows: commercially available soybean protein is dissolved in the buck, and the centrifugal impurity of removing is regulated PH=5.70～6.5 with acid, after treating protein powder preliminary precipitation, centrifugal, take out precipitation, add water, transfer PH=4.5, albumen is fully precipitated, and through centrifugal, washing, vacuum-drying get final product.
The used commercially available soybean protein of the present invention is buied from Yunmeng County, Hubei dragon cloud egg-white food company limited, its standard Wei E Q/YZW * 01-96.Glycerine is commercially available, without any processing.
Water-proof and heat-resistant plastic soybean protein film of the present invention can be used for the wrapping material in chemical industry, food, the environmental area, also can be used as medical material, as the immobilization of medicine enzyme, and useful for drug delivery and release.
Compared with the prior art, adopt the obtained beneficial effect of technical scheme of the present invention as follows:
1. employing heat pressing process, technology is simple, and cost is low, and energy consumption is low.By gained film tool thermoplasticity of the present invention,
Hot pressing repeatedly, this is because used softening agent is a high boiling point glycerine, no low-boiling compound exists.
2. obtain water-proof natural polymer film first.Test shows: it both can cold-resistant water, again can anti-boiling water.
And can improve greatly by the water tolerance of present method fractionated soybean protein.
3. by the film winter hardiness height of gained of the present invention, its glass transition temperature Tg of test shows is on-70 ℃ of left sides
Right.And the Tg of general starch, cellulose membrane class is only about room temperature, and winter hardiness is poor.
4. by gained film vacuum-resistant of the present invention extracting, environmental stability height, test shows: true at 2mmHg
Empty extracting down 7 hours, film still can keep elasticity preferably.
Below in conjunction with specific embodiment technical scheme of the present invention is described further:
The preparation of embodiment 1 soybean protein powder:
The commercially available soybean protein isolate of 400g is scattered in 6 liters of deionized waters, drips the NaOH of 2M, up to PH=13, stirs after 30 minutes, leaves the heart 10 minutes in 8000.Get supernatant liquor and transfer PH=5.70 with 2M HCL, the cotton-shaped viscous protein matter precipitation of adularescent this moment produces, and leaves the heart 10 minutes through 8000.Get precipitation and add water 2 premium on currency, transfer PH=4.5, make reprecipitation.Again through 8000 change 10 minutes centrifugal, get precipitation and water and acetone and respectively give a baby a bath on the third day after its birth time, vacuum-drying promptly gets brown white product.With the product high speed pulverization, cross 140 mesh sieves, dry, storage gets final product.
Embodiment 2
Get the soybean protein powder 3g in the foregoing description 1, add glycerine 1.5g, ground 30 minutes with mortar, be tiled in behind the thorough mixing between the glazing plate of two cupronickels, tabula rasa is of a size of 18.5cm * 10.5cm * 1mm.Carry out hot pressing then, temperature control is in 150 ℃, and pressure is 15Mpa.Hot pressing 20 seconds, wind was chilled to 80 ℃ in 20 minutes, and delivery promptly gets the yellow transparent film.The performance of film sees attached list 1.
Embodiment 3
Get the soybean protein powder 3g in the foregoing description 1, add glycerine 2g, ground 30 minutes, be tiled in behind the thorough mixing between two above-mentioned glazing plates with mortar.Through hot pressing, and temperature control is in 180 ℃, and pressure is 10Mpa, hot pressing 20 seconds.Be chilled to 80 ℃ in 20 minutes with wind, take out and promptly get the yellow transparent film.
Table 1. classification is to the soybean protein film Effect on Performance
| The source | Dry state mechanical property tensile strength elongation (MPa) (%) | Water resisting property aTensile strength elongation (MPa) (%) | Anti-boiling water bTensile strength elongation (MPa) (%) |
| Embodiment 2 classification albumen control commercial albumen | ?5.5?????????140?? ?3.0?????????60 | ??2.4??????130 ??0.65??????90 | 1.9 160 is too soft |
Continuous table 1:
| The source | Vacuum is taken out after 7 hours tensile strength elongation (MPa) (%) | Transmittance (%) | Second-order transition temperature (Tg) |
| Embodiment 2 classification albumen control commercial albumen | ?14???????????42 ??7??????????100 | ????78 ????76 | ????-75 ????-70 |
aSteep 15 big in 25 ℃ of water loggings.
bIn boiling water digestion 15 minutes.
Claims (2)
1. the preparation method of a water-proof and heat-resistant plastic soybean protein film, behind the protein powder and glycerine co-blended with extract in the soybean residue, at 100-180 ℃, hot pressing forms under the 10-15Mpa, it is characterized in that: the weight ratio of soybean protein powder and glycerine is 1: 0.4-1: 0.7.
2. method according to claim 1, it is characterized in that described soybean protein powder is to make as follows: commercially available soybean protein is dissolved in the buck, and is centrifugal, removes impurity, transfer PH=5.70～6.5 with acid, after treating albumen preliminary precipitation, centrifugal, taking precipitate also adds water, transfer PH=4.5, albumen is fully precipitated, through centrifugal, washing, vacuum-drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00116036 CN1285376A (en) | 2000-09-19 | 2000-09-19 | Process for preparation of water-proof and heat-resistant plastic soybean protein film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00116036 CN1285376A (en) | 2000-09-19 | 2000-09-19 | Process for preparation of water-proof and heat-resistant plastic soybean protein film |
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| CN1285376A true CN1285376A (en) | 2001-02-28 |
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| CN 00116036 Pending CN1285376A (en) | 2000-09-19 | 2000-09-19 | Process for preparation of water-proof and heat-resistant plastic soybean protein film |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146004A (en) * | 2013-02-27 | 2013-06-12 | 江阴摩尔化工新材料有限公司 | Method for improving soybean protein isolate film water resistance through photo-crosslinking |
| CN103183837A (en) * | 2012-12-14 | 2013-07-03 | 江南大学 | Preparation method of heat resistant soy protein/graphene oxide composite membrane |
| CN103283937A (en) * | 2013-04-26 | 2013-09-11 | 中国国旅贸易有限责任公司 | Casing film and preparation method thereof |
| CN104686782A (en) * | 2015-03-16 | 2015-06-10 | 常熟理工学院 | Method for improving water vapor isolation performance of soy protein isolate film |
| CN105886677A (en) * | 2016-04-22 | 2016-08-24 | 广州市惠景皮革有限公司 | Aniline calfskin leather coating composition and coating technology thereof |
| CN106012092A (en) * | 2016-08-05 | 2016-10-12 | 翁冰雄 | Multifunctional protein fiber and preparation method thereof |
| CN113350319A (en) * | 2021-07-08 | 2021-09-07 | 周文超 | Medical plaster |
-
2000
- 2000-09-19 CN CN 00116036 patent/CN1285376A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103183837A (en) * | 2012-12-14 | 2013-07-03 | 江南大学 | Preparation method of heat resistant soy protein/graphene oxide composite membrane |
| CN103183837B (en) * | 2012-12-14 | 2016-08-03 | 江南大学 | A kind of preparation method of heat resistant soy protein/graphene oxide composite membrane |
| CN103146004A (en) * | 2013-02-27 | 2013-06-12 | 江阴摩尔化工新材料有限公司 | Method for improving soybean protein isolate film water resistance through photo-crosslinking |
| CN103283937A (en) * | 2013-04-26 | 2013-09-11 | 中国国旅贸易有限责任公司 | Casing film and preparation method thereof |
| CN104686782A (en) * | 2015-03-16 | 2015-06-10 | 常熟理工学院 | Method for improving water vapor isolation performance of soy protein isolate film |
| CN105886677A (en) * | 2016-04-22 | 2016-08-24 | 广州市惠景皮革有限公司 | Aniline calfskin leather coating composition and coating technology thereof |
| CN105886677B (en) * | 2016-04-22 | 2018-05-18 | 广州市惠景皮革有限公司 | A kind of aniline calf-skin applies decorative composition and its Coating technology |
| CN106012092A (en) * | 2016-08-05 | 2016-10-12 | 翁冰雄 | Multifunctional protein fiber and preparation method thereof |
| CN106012092B (en) * | 2016-08-05 | 2018-02-16 | 广东安之伴实业有限公司 | A kind of multifunctional protein fiber and preparation method thereof |
| CN113350319A (en) * | 2021-07-08 | 2021-09-07 | 周文超 | Medical plaster |
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