CN1111260A - Starch derivative for biodegradable plastic products and producing method thereof - Google Patents
Starch derivative for biodegradable plastic products and producing method thereof Download PDFInfo
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- CN1111260A CN1111260A CN 94104560 CN94104560A CN1111260A CN 1111260 A CN1111260 A CN 1111260A CN 94104560 CN94104560 CN 94104560 CN 94104560 A CN94104560 A CN 94104560A CN 1111260 A CN1111260 A CN 1111260A
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Abstract
The amylum derivative for biologically degrading plastics is produced with corn amylum, chemical reagent, assistant and catalyst through chemical reaction of crosslinkage, esterification and grafting, filtering, neutralization, stoving and other process. It may be mixed with polymer, used as stuffing and reinforcer or bonded with polymer. The present invention solves the problem of plastic pollution by providing degrading material.
Description
The invention belongs to modern biological project field starch and be processed into the articles of biodegradable plastics material starch derivative.
In recent years, round environmental pollution that solves plastics and mulch film public hazards (drawback that the rehabilitation after so-called mulch film is used causes) problem, developed " photolysis plastic " that utilizes ultraviolet to decompose both at home and abroad.The subject matter that this photolysis plastic exists is the cost height, is subjected to the envrionment conditions restriction strong.Therefore be difficult for promoting.
Purpose of the present invention is exactly at the deficiencies in the prior art part, employing is main raw material with the W-Gum, produce the starch derivative that articles of biodegradable plastics material is used, this starch derivative can not only mix with synthetic polymer, and can be used as filler, extender or stiffeners also can become the integral part of this base polymer by chemical bond.
Technical solution of the present invention is: with W-Gum through chemical treatment make that starch is crosslinked, esterification and grafting carry out simultaneously, finally make to be used for the starch derivative that articles of biodegradable plastics material is used.
Major ingredient of the present invention is: in starch weight is 100%:
Sodium hydroxide accounts for 10%～25% of starch
Acetate accounts for 10%～15% of starch
The polypropylene acid esters accounts for 5%～8% of starch
Acetone accounts for 2% of starch
Sulfuric acid accounts for 0.5% of starch
Ethanol accounts for 0.5% of starch
Technical indicator of the present invention is:
Outward appearance: pure white, powdery
Fineness :-120 orders
Proportion: 1.6 gram/cm
3
Robust fibre: 0.1%
Ash: 0.1%
Moisture content: 2%
Accompanying drawing is a process flow sheet of the present invention:
Among the figure: DF is a W-Gum, and HO is a water, A, B, C, D, E, F.Auxiliary agent A is a sodium hydroxide, and auxiliary agent B is an acetate, and auxiliary agent C is the polypropylene acid esters, and auxiliary agent D is an acetone, and auxiliary agent E is a sulfuric acid, and auxiliary agent F is an ethanol.1 is retort, and 2 is that strainer one, 3 is No. 1 jar of filtrate, 4 is that derivative one, 5 is a neutralization tank, and 6 is strainer two, 7 is No. 2 jars of filtrate, and 8 is that derivative two, 9 is filtrate 2 treatment tanks, 10 is strainer three, 11 is No. 3 jars of filtrate, and 12 is that derivative three, 13 is the airflow drying device, 14 is centrifugal collector, and 15 is the finished product starch derivative.
Introduce in detail the technological process of production of the present invention below in conjunction with accompanying drawing:
1, DF adds the HO mediation;
2, press respectively A, B, C, D, E, F order in proper order by in the process conditions adding flow process 1, and stir;
3, enter in the retort 1, reaction is six hours in 1, adjusts pH value at 8.4～11;
4, reactant liquor in 1 is carried in 2 filtered, filtrate 3 is returned DF and is added among the HO, and sediment is starch derivatives-4;
5, send 4 into 5 and carry out the HO neutralization, starch derivatives and water ratio are 1: 2, splash into 2% hydrochloric acid and play neutralization reaction one minute, and this moment, pH value was 4.5;
6, the liquid after will neutralizing send in 6 and filters, and filtrate is sent in 7, returns DF and add among the HO after 9 process, and sediment is starch derivatives 28, and adds entry wash in 8;
7, the starch derivatives two after will washing is delivered in 10 and filters, and filtrate is returned through 11 Return DF and add among the HO, sediment is starch derivatives 3 12;
8, starch derivatives three is delivered to carried out airflow drying in 13;
9, the starch derivatives three after the oven dry is delivered to and is carried out the vortex dedusting in 14;
10, the starch derivatives after the dust removal process is biodegradable plastic starch derivatives goods
Technological temperature of the present invention is 45 ℃～50 ℃, and pH value is 8.4～11 in the retort, and pH value is 4.5 in the neutralization reaction tank.
The cornstarch derivative that the present invention produces, can be made into the plastic matrix of the different various uses of starch-containing amount, not only can produce the controllable biodegradable plastic film with this plastic matrix, can also produce the degradative plastics goods of all size, such as packaging bag, food bag, handbag, refuse bag, seedling-raising cup, tableware, tablecloth, tank, bucket, flexible pipe etc. Because biodegradation. Thereby can improve environmental pollution and eliminate public hazards, be conducive to people ' s health, performance physical and chemical index of the present invention all reaches and part is better than existing plastic products.
The embodiment of the invention; In 45 ℃, carry out:
1, gets 200 kilograms of starch, add 300 kilograms in water and be in harmonious proportion evenly;
2, add 24 kilograms of sodium hydroxide, 20 kilograms of acetate, 12 kilograms of polypropylene acid esters, 4 kilograms of acetone, 1 kilogram of sulfuric acid adds 1 kilogram of ethanol at last, and needing when adding auxiliary agent constantly to stir pH value is 10;
3, in retort 1, reacted six hours;
4, reaction solution filters in 2, and filtrate is deposited and returned starch and adds the water place and use;
5, starch derivative adds 400 kg of water in 5, and splashes into 4 kilograms of hydrochloric acid and neutralize, in and 1 minute time, pH value is 4.5;
6, the liquid after the neutralization send 6 to filter once more, and filtrate is gone into 7 and added in 9 and return starch again after 2 kilograms of lime treatments and add water place usefulness again, and starch derivative two is delivered in 8, adds 400 kilograms and washes processing;
7, the starch derivative two after will washing is delivered in 10 and is filtered once more.Filtrate is returned starch through 11 and is added the water place and use.Starch derivative three is delivered to and is carried out airflow drying in 13;
8, the about 200 kilograms of starch derivative after the oven dry are delivered to and are carried out dust removal process in 14;
9, through the encapsulation of just can packing after the dust removal process, make about 200 kilograms ± 5 kilograms biodegradable plastic starch derivative.
Claims (4)
1, the starch derivative used of a kind of articles of biodegradable plastics material of forming by W-Gum, it is characterized in that main component is: in starch weight is 100%:
Sodium hydroxide accounts for 10%～25% of starch,
Acetate accounts for 10%～15% of starch,
The polypropylene acid esters accounts for 5%～8% of starch,
Acetone accounts for 2% of starch,
Sulfuric acid accounts for 0.5% of starch,
Ethanol accounts for 0.5% of starch.
2, derivative according to claim 1 is characterized in that technical indicator is:
Outward appearance: pure white, powdery,
Fineness :-120 orders,
Proportion: 1.6 gram/cm
3,
Robust fibre: 0.1%,
Ash: 0.1%,
Moisture content: 2%.
3, the starch derivative preparation method that uses of a kind of articles of biodegradable plastics material of being made up of W-Gum is characterized in that:
(1) W-Gum adds water;
(2) add in proper order in the flow process (1) by sodium hydroxide, acetate, polypropylene acid esters, acetone, sulfuric acid, ethanol respectively, and be stirred in the retort;
(3) in retort, react;
(4) reaction solution is sent strainer-filtration, in the filtrate Returning process (1);
(5) derivative one is added water and adds hydrochloric acid neutralize at neutralization tank;
(6) neutralization back liquid is gone into strainer two, and filtrate two is gone into treatment tank after treatment in the Returning process (1), and derivative two adds water and washes;
(7) derivative two after the washing is gone into strainer three filtrations, filtrate three Returning process (1);
(8) derivative three goes in the airflow drying device to dry;
(9) oven dry back derivative is gone into dedusting in the centrifugal collector;
(10) finished product.
4, preparation method according to claim 3 is characterized in that:
(1) reaction times is 6 hours in the retort, and pH value is 8.4～11;
(2) derivative and water ratio are 1: 2 in the flow process (5), and concentration of hydrochloric acid is that the 2%PH value is 4.5;
(3) technological temperature is 45 ℃～50 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94104560 CN1111260A (en) | 1994-05-04 | 1994-05-04 | Starch derivative for biodegradable plastic products and producing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94104560 CN1111260A (en) | 1994-05-04 | 1994-05-04 | Starch derivative for biodegradable plastic products and producing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1111260A true CN1111260A (en) | 1995-11-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94104560 Pending CN1111260A (en) | 1994-05-04 | 1994-05-04 | Starch derivative for biodegradable plastic products and producing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1111260A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857665A (en) * | 2010-05-07 | 2010-10-13 | 中国地质大学（武汉） | Fully-degradable starch hydrogel and preparation method thereof |
| CN101921342A (en) * | 2010-09-20 | 2010-12-22 | 江南大学 | Method for preparing crosslinked tapioca starch sodium octenyl succinate |
| CN105647093A (en) * | 2016-03-31 | 2016-06-08 | 山东师范大学 | Biodegradable starch-based resin composition |
-
1994
- 1994-05-04 CN CN 94104560 patent/CN1111260A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857665A (en) * | 2010-05-07 | 2010-10-13 | 中国地质大学（武汉） | Fully-degradable starch hydrogel and preparation method thereof |
| CN101921342A (en) * | 2010-09-20 | 2010-12-22 | 江南大学 | Method for preparing crosslinked tapioca starch sodium octenyl succinate |
| CN101921342B (en) * | 2010-09-20 | 2012-05-23 | 江南大学 | Method for preparing crosslinked tapioca starch sodium octenyl succinate |
| CN105647093A (en) * | 2016-03-31 | 2016-06-08 | 山东师范大学 | Biodegradable starch-based resin composition |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
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