CN103254490A - Preparation process of double-degradation agricultural film - Google Patents
Preparation process of double-degradation agricultural film Download PDFInfo
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- CN103254490A CN103254490A CN2013102078928A CN201310207892A CN103254490A CN 103254490 A CN103254490 A CN 103254490A CN 2013102078928 A CN2013102078928 A CN 2013102078928A CN 201310207892 A CN201310207892 A CN 201310207892A CN 103254490 A CN103254490 A CN 103254490A
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Abstract
The invention discloses a preparation process of a double-degradation agricultural film, which is used for solving the problems that the agricultural film is not easy to degrade and serious in white pollution. The adopted technical scheme is as follows: the double-degradation agricultural film is prepared by coating nanometer titania and adding modified starch. The double-degradation agricultural film is easy to degrade, high in degradation speed and free of white pollution; and the preparation process is simple, low in cost and easy for batch production.
Description
Technical field
The invention belongs to the agricultural mulching preparing technical field, relate to a kind of preparation technology of two degraded agricultural mulchings, particularly a kind ofly can solve the preparation technology that agricultural mulching is difficult for the serious two degraded agricultural mulchings of degraded, white pollution.
Background technology
In agriculture production, cover not only to have with agricultural mulching and protect fertile, insect protected and press down functions such as grass, can also keep soil moisture, improve efficiency of water application, improve crop growth environment simultaneously, improve crop yield and agriculture benefit.Agricultural mulching has become the third-largest means of agricultural production material behind agriculture production relaying chemical fertilizer, the agricultural chemicals, huge economic benefit and social benefit have been produced since the agricultural mulching self-application, it can make the output of farm crop improve 20-50%, has greatly promoted China's Agricultural Development.But it is also serious day by day thereupon to the white pollution problems that agroecological environment causes at a large amount of discarded films that produce behind the agricultural mulching that use, discarded agricultural mulching generally is difficult to reclaim, and its residual accumulation can cause Soil structure to destroy, harden, gas permeability of soil variation, and influence is cultivated.
Summary of the invention
The objective of the invention is to be difficult for degraded, the serious problem of white pollution in order to solve agricultural mulching, provide a kind of and prepared couple preparation technology of degraded agricultural mulchings to nano titanium oxide coating and interpolation treated starch.
The present invention realizes that the technical scheme that goal of the invention adopts is, a kind of preparation technology of two degraded agricultural mulchings, and key is: the steps of described preparation pair degraded agricultural mulching comprise:
A, titanium dioxide is joined in the dehydrated alcohol, ultrasonic 11-15 minute, then with the 12-15r/min magnetic agitation and add dilute hydrochloric acid to regulate pH value be 3.5-3.8, the salts solution that adds poly (sodium 4-styrenesulfonate), regulate pH value and maintain 3.5-3.8, ultrasonic 6-10 minute again, stir 22-25 minute then, centrifugal, wash with water twice after removing clear liquid, the product of winning joins first product in the deionized water, stirs, and dropwise add the salts solution of diallyl dimethyl ammoniumchloride, ultrasonic 6-10 minute and with the 12-15r/min magnetic agitation, centrifugal back generated second product with deionized water wash twice;
B, starch, calcium carbonate are adopted the superfine grinding of high pressure draft pulverizer, raw material through mediating blend at a high speed, generates third product again through super-refinement, activation and coupling surface treatment;
C, Low Density Polyethylene is joined in the hexanaphthene, add UV light absorber, maintain the temperature at 70-80 ℃ 0.5-1.5 hour, second product is joined in the hexanaphthene, add Sodium dodecylbenzene sulfonate, ultrasonic 12-15 minute, place the baking oven preheating, temperature is made as 70-80 ℃, treat that Low Density Polyethylene dissolves fully after, get the cyclohexane solution of Low Density Polyethylene, second product dispersion liquid and the third product good with preheating mix, together join film forming in the container molding, treat that solvent evaporates is complete, the composite membrane in the container molding is taken off getting final product.
Described starch is at least a in W-Gum, Starch rice, green starch, yam starch, the Rhizoma Nelumbinis starch.
Described UV light absorber is Octabenzone.
The concentration of described dilute hydrochloric acid is 0.04-0.45mol/l.
The concentration of salt solution of described poly (sodium 4-styrenesulfonate) is 1.5-1.8 mg/ml.
The concentration of salt solution of described diallyl dimethyl ammoniumchloride is 1.5-1.8mg/ml.
Invention thinking of the present invention is: adopt two modes of degrading to improve the degradation rate of agricultural mulching, reduce white pollution.First, adopt the method for electrostatic adhesion to coat polyelectrolyte PSS and PDDA on the titanium dioxide granule surface, utilize the mutual repulsive force between same sex electric charge, suppressing TiO 2 particles reunites because of high surface energy, improve the dispersiveness of photocatalyst in polyethylene film, strengthen the binding ability of itself and polyethylene matrix simultaneously, promote the degraded of composite membrane under ultraviolet lighting.The second, by adding the mode of treated starch, accelerate degradation rate, because starch by microbial attack, is degraded gradually disappear, and the formation porous is destroyed structure in polymkeric substance, cause the long-pending increase of polymer surfaces, thereby be conducive to the further natural decomposition of polymkeric substance; Simultaneously, starch degradation can inspire the effect of oxygenant and autoxidator, can cut off macromolecular chain, and the relative molecular weight of polymkeric substance constantly is reduced to soon by the degree of microbial metabolism.Adopt the combination of above dual mode, can accelerate degradation rate, realize two degradeds of agricultural mulching, significantly reduced white pollution.
The invention has the beneficial effects as follows: two degraded agricultural mulchings are easily degraded, and degradation speed is fast, can not produce white pollution, and this preparation technology is simple, and cost is low, are easy to produce in batches.
Embodiment
A kind of preparation technology of two degraded agricultural mulchings, key is: the step of the two degraded of described preparation agricultural mulching comprises:
A, titanium dioxide is joined in the dehydrated alcohol, ultrasonic 11-15 minute, then with the 12-15r/min magnetic agitation and add dilute hydrochloric acid to regulate pH value be 3.5-3.8, the salts solution that adds poly (sodium 4-styrenesulfonate), regulate pH value and maintain 3.5-3.8, ultrasonic 6-10 minute again, stir 22-25 minute then, centrifugal, wash with water twice after removing clear liquid, the product of winning joins first product in the deionized water, stirs, and dropwise add the salts solution of diallyl dimethyl ammoniumchloride, ultrasonic 6-10 minute and with the 12-15r/min magnetic agitation, centrifugal back generated second product with deionized water wash twice;
B, starch, calcium carbonate are adopted the superfine grinding of high pressure draft pulverizer, raw material through mediating blend at a high speed, generates third product again through super-refinement, activation and coupling surface treatment;
C, Low Density Polyethylene is joined in the hexanaphthene, add UV light absorber, maintain the temperature at 70-80 ℃ 0.5-1.5 hour, second product is joined in the hexanaphthene, add Sodium dodecylbenzene sulfonate, ultrasonic 12-15 minute, place the baking oven preheating, temperature is made as 70-80 ℃, treat that Low Density Polyethylene dissolves fully after, get the cyclohexane solution of Low Density Polyethylene, second product dispersion liquid and the third product good with preheating mix, together join film forming in the container molding, treat that solvent evaporates is complete, the composite membrane in the container molding is taken off getting final product.
Described starch is at least a in W-Gum, Starch rice, green starch, yam starch, the Rhizoma Nelumbinis starch.
Described UV light absorber is Octabenzone.
The concentration of described dilute hydrochloric acid is 0.04-0.45mol/l.
The concentration of salt solution of described poly (sodium 4-styrenesulfonate) is 1.5-1.8 mg/ml.
The concentration of salt solution of described diallyl dimethyl ammoniumchloride is 1.5-1.8mg/ml.
Performance test
This ultraviolet lighting test is carried out in lighting box.The ultraviolet lamp that uses is that two predominant wavelengths are the 30w ultraviolet lamp of 254nm.Two degraded agricultural mulchings and the common ground film of homalographic are placed culture dish respectively, and with the equidistant lighting box that places of two culture dish, film and fluorescent tube spacing are 5cm.Timing sampling in the illumination degrading process, the weighing film is heavy.Along with the carrying out of illumination, weight loss in various degree all can appear in two groups of mulch films.Two degraded agricultural mulching degradation rates will be higher than the degradation rate of common ground film.After the illumination 240 hours, common ground film weightlessness 15%, and two degraded agricultural mulching composite membrane weight loss reaches 56%.
Claims (6)
1. the preparation technology of two degraded agricultural mulchings, it is characterized in that: the steps of the two degraded of described preparation agricultural mulching comprise:
A, titanium dioxide is joined in the dehydrated alcohol, ultrasonic 11-15 minute, then with the 12-15r/min magnetic agitation and add dilute hydrochloric acid to regulate pH value be 3.5-3.8, the salts solution that adds poly (sodium 4-styrenesulfonate), regulate pH value and maintain 3.5-3.8, ultrasonic 6-10 minute again, stir 22-25 minute then, centrifugal, wash with water twice after removing clear liquid, the product of winning joins first product in the deionized water, stirs, and dropwise add the salts solution of diallyl dimethyl ammoniumchloride, ultrasonic 6-10 minute and with the 12-15r/min magnetic agitation, centrifugal back generated second product with deionized water wash twice;
B, starch, calcium carbonate are adopted the superfine grinding of high pressure draft pulverizer, raw material through mediating blend at a high speed, generates third product again through super-refinement, activation and coupling surface treatment;
C, Low Density Polyethylene is joined in the hexanaphthene, add UV light absorber, maintain the temperature at 70-80 ℃ 0.5-1.5 hour, second product is joined in the hexanaphthene, add Sodium dodecylbenzene sulfonate, ultrasonic 12-15 minute, place the baking oven preheating, temperature is made as 70-80 ℃, treat that Low Density Polyethylene dissolves fully after, get the cyclohexane solution of Low Density Polyethylene, second product dispersion liquid and the third product good with preheating mix, together join film forming in the container molding, treat that solvent evaporates is complete, the composite membrane in the container molding is taken off getting final product.
2. the preparation technology of a kind of two degraded agricultural mulchings according to claim 1 is characterized in that: described starch is at least a in W-Gum, Starch rice, green starch, yam starch, the Rhizoma Nelumbinis starch.
3. the preparation technology of a kind of two degraded agricultural mulchings according to claim 1, it is characterized in that: described UV light absorber is Octabenzone.
4. the preparation technology of a kind of two degraded agricultural mulchings according to claim 1, it is characterized in that: the concentration of described dilute hydrochloric acid is 0.04-0.45mol/l.
5. the preparation technology of a kind of two degraded agricultural mulchings according to claim 1, it is characterized in that: the concentration of salt solution of described poly (sodium 4-styrenesulfonate) is 1.5-1.8 mg/ml.
6. the preparation technology of a kind of two degraded agricultural mulchings according to claim 1, it is characterized in that: the concentration of salt solution of described diallyl dimethyl ammoniumchloride is 1.5-1.8mg/ml.
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| CN201310207892.8A CN103254490B (en) | 2013-05-30 | 2013-05-30 | A kind of preparation technology of two degraded agricultural mulching |
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| CN201310207892.8A CN103254490B (en) | 2013-05-30 | 2013-05-30 | A kind of preparation technology of two degraded agricultural mulching |
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| CN103254490A true CN103254490A (en) | 2013-08-21 |
| CN103254490B CN103254490B (en) | 2015-09-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105017617A (en) * | 2015-07-23 | 2015-11-04 | 安徽德琳环保发展（集团）有限公司 | Nanometer-titanium-dioxide-supported crosslinked-starch-modified low-density-polyethylene degradation mulch film and preparation method thereof |
| CN109320833A (en) * | 2018-11-02 | 2019-02-12 | 廖荣金 | A kind of degradable mulch and preparation method |
| CN109354747A (en) * | 2018-11-02 | 2019-02-19 | 廖荣金 | A kind of degradable films and preparation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418906A (en) * | 2002-11-28 | 2003-05-21 | 玉环县星光环卫薄膜厂 | Double degradation plastic film and production method thereof |
-
2013
- 2013-05-30 CN CN201310207892.8A patent/CN103254490B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418906A (en) * | 2002-11-28 | 2003-05-21 | 玉环县星光环卫薄膜厂 | Double degradation plastic film and production method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 丁延伟等: "纳米二氧化钛表面包覆的研究", 《现代化工》, vol. 21, no. 7, 31 July 2001 (2001-07-31), pages 18 - 22 * |
| 邓舜扬等: "《新型塑料薄膜》", 31 May 1994, 中国轻工业出版社, article "溶液流延成型制塑料薄膜", pages: 64 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105017617A (en) * | 2015-07-23 | 2015-11-04 | 安徽德琳环保发展（集团）有限公司 | Nanometer-titanium-dioxide-supported crosslinked-starch-modified low-density-polyethylene degradation mulch film and preparation method thereof |
| CN109320833A (en) * | 2018-11-02 | 2019-02-12 | 廖荣金 | A kind of degradable mulch and preparation method |
| CN109354747A (en) * | 2018-11-02 | 2019-02-19 | 廖荣金 | A kind of degradable films and preparation method |
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| CN103254490B (en) | 2015-09-09 |
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