CN102943414A - High-water repellency high-photopermeability biodegradable cotton agricultural thin film - Google Patents
High-water repellency high-photopermeability biodegradable cotton agricultural thin film Download PDFInfo
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- CN102943414A CN102943414A CN 201210524256 CN201210524256A CN102943414A CN 102943414 A CN102943414 A CN 102943414A CN 201210524256 CN201210524256 CN 201210524256 CN 201210524256 A CN201210524256 A CN 201210524256A CN 102943414 A CN102943414 A CN 102943414A
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Abstract
The invention relates to the technical field of a degradable agricultural film product and the perpetration of the degradable agricultural film product, and in particular relates to a high-water repellency high-photopermeability biodegradable cotton agricultural mulching film and a preparation method thereof. The main raw materials of the film mainly comprise waste cotton fibers, such as embossed cotton lower pile, cotton noils, waste cotton clothes and the like. The perpetration method comprises the following steps of: adding dispersing agent, softening agent, wet strength agent and the like with proper quantity, preparing semi-finished products by a wet-process papermaking technology, soaking by liquid paraffin, carrying out PVA (polyvinyl alcohol) gluing, tidying rolling liquid by a two-soaking and two-rolling technology, baking, and drying at room temperature to obtain a finished product. The thin film prepared by the technology is quick in biodegradability, high in water repellency and high in photopermeability, the light transmittance of the thin film is more than 68%, and the seedling growth of most of crops and vegetables can be met, so that the film is an ideal material for partially replacing the common plastic thin film and preventing and curing 'the white pollution'.
Description
Technical field
The present invention relates to degrade plastic sheeting for farm use product and preparing technical field thereof specifically are a kind of high WATER REPELLENCY high light transmittance biodegradation cotton agricultural mulchings and preparation method thereof.
Background technology
The extensive use of plastic film is to improving crop yield, quality, solving extremely frigid zones grows seedlings in advance, plants, and plantation anti-season vegetables, melon and fruit etc. play very important effect, because its natural degradation was for up to 200～300 years, residual film must be reclaimed, reality is that recovery operation seriously lags behind, and causes startling " white pollution " to ecological environment, and the soil compaction soil fertility is declined to become universal phenomenon.In addition, a large amount of uses of plastic film have increased the consumption of limited and non-renewable petroleum resources.Therefore, extensively carry out the research work of degradable agricultural film over nearly 30 years both at home and abroad, developed starch addition type Biodegradable mulch, photodegradation film, light/Biodegradable mulch, plant fiber mulch and the liquid film etc. that sprays.Wherein the main raw material of starch addition type Biodegradable mulch and photodegradation film employing remains plastics and chemical fibre, can't eradicate " white pollution " problem fully; Plant fiber mulch mainly is the paper mulch film, the numb mulch film of domestic environment-friendly type take academy of agricultural sciences's crudefiber crop Research Institute is as representative, utilize string such as needlebush, leaf wood, fiber crops, reed etc. to develop a series of paper mulch film as representative take states such as Japan abroad, there is wind resistance rain ability, easily broken in the paper mulch film, is not suitable for the problems such as mechanical plastic film mulch.Degradable liquid-state mulch film carries out modification with brown coal, weathered coal or peat to waste liquids such as black liquids, under the effect of crosslinking agent, form macromolecule by lignin, cellulose and polysaccharide, mix with various additives, siliceous fertilizer, trace element, agricultural chemicals and herbicide and produce acquisition, the insulation soil moisture conservation effect of this class mulch film is relatively poor.
According to another statistics, the discarded natural fabrics such as the annual cotton that produces of China, fiber crops surpass 500,000 tons, and increase year by year, and these discarded objects not only endanger environment, and cause the very large wasting of resources.As these discarded natural fabrics are made plastic film for agricultural use, then can substitute conventional macromolecule plastic sheeting for farm use and use about 6%～9% of total amount.
Summary of the invention
The present invention proposes to utilize the cotton fibers such as discarded cotton linter, waste and old cotton dress thing to make a kind of paper substrate cotton degradative plastic film and preparation technology thereof who can be used for agricultural production.
The preparation technology of paper substrate cotton degradative plastic film is: adopt to steam and float the pulping way of one, with alkaline boiling cotton pulp material.NaOH is the main component of cooking liquor, hydrogen peroxide is bleaching agent, wherein alkali charge is 3～7%, the hydrogen peroxide consumption is 6～9%, dodecyl sodium sulfate consumption 1～3%, dicyandiamide consumption 0.1～0.3%, ethylenediamine tetra-acetic acid (EDTA) consumption 0.05～0.1%, anthraquinone consumptions 0.02～0.05% etc., liquor ratio is 1: 5.In order to increase dried, the wet strength of cotton mulch film, need in the cotton film preparation process to add some auxiliary agents, such as wet strength agent polyamine epichlorohydrin resin (PAE), consumption is 0.8～1.5% of oven dry stock mass fraction; Plasticizer tetraglycidel ether epoxy resin, consumption are 0.5～1.0% of oven dry stock mass fraction; Short degradation agent cellulase consumption is 1～5% of oven dry stock mass fraction.Heating-up time 50min for the first time in the digestion process, intensifications that as far as possible remain a constant speed is incubated 95min when temperature reaches 105～110 ℃.Heating-up time 5min for the second time, when temperature reaches 118 ± 2 ℃, insulation 20min, steam bleeding immediately after the end.Cotton fiber flushing with boiling, the flush away loose colour, certain cotton fiber is put into beater pulls an oar, beating degree is controlled at 30～500SR, the cotton pulp of accomplishing fluently is dried to decide the grammes per square metre of cotton mulch film, the cotton fiber of the certain grammes per square metre of weighing is put into the fiber dissociation device and is diluted to dissociate and make the suspension of fiber pulp again, this liquid poured into copy in the paper device, filtering moisture obtains wet fiber net, squeeze out wherein moisture and air through hydraulic press, put into dryer and dry 2min, carefulness strips and can obtain paper substrate cotton mulch film sample semi-finished product.Be immersed at last in 2～8% polyvinyl alcohol (PVA) the applying glue liquid, employing two is soaked two roll process and is carried out the mangle arrangement, sample after the arrangement is placed in the baking oven of uniform temperature, the preliminary drying certain hour, glue is fully binded on cotton mulch film sample surface, then at room temperature dry and namely obtain the cotton mulch film.Environment temperature is controlled at about 20 ℃, and relative humidity is 30%～60%.
Table 1 provides the common PE mulch film that obtains after tested and the performance of degradable cotton quality film.Can find out: the Thickness Ratio common PE mulch film of degradable cotton quality film is large, large 0.8 times than PE mulch film of surface density; Degradable mulch is done, the brute force (because be round-formed net, not have in length and breadth to contrasting) under the hygrometric state exceeds respectively 1.8 and 0.74 times than the brute force of PE mulch film; But the elongation at break of degradable mulch only has 2.3% of PE mulch film not as good as the PE mulch film under the dry state, be 3.3% of PE mulch film under the hygrometric state; The tearability of the tearability of cotton mulch film and common PE mulch film is basic identical, and bursting strength also is more or less the same.As seen, degradable cotton quality membrane portions performance indications meet or exceed agricultural plastic ground membrane.
The performance of table 1 common PE mulch film and degradable cotton quality film
The invention has the advantages that:
(1) but utilize discarded cotton linter and waste and old cotton dress thing manufacturing natural degradation agricultural film, take full advantage of resource, turn waste into wealth, can effectively reduce " white pollution " again simultaneously.
(2) this technique is to utilize the method for wet papermaking to prepare paper substrate cotton mulch film, with polyvinyl alcohol (PVA) as adhesive, can significantly improve doing by force and wetting by force of cotton film, and can obviously improve the light transmittance of cotton mulch film, simple, the easy row of preparation method.
(3) degradable cotton quality membrane portions performance indications meet or exceed agricultural plastic ground membrane, can satisfy the cultivation seedling-cultivating of the crops such as capsicum, cotton, corn fully.
The specific embodiment
Embodiment: adopt to steam and float the pulping way of one, with alkaline boiling cotton pulp material.NaOH is the main component of cooking liquor, and hydrogen peroxide is bleaching agent, and wherein alkali charge is 5%, the hydrogen peroxide consumption is 6%, dodecyl sodium sulfate consumption 1.5%, dicyandiamide consumption 0.2%, ethylenediamine tetra-acetic acid (EDTA) consumption 0.05%, anthraquinone consumption 0.03% etc., liquor ratio is 1: 5.In order to increase dried, the wet strength of cotton mulch film, need in the cotton film preparation process to add some auxiliary agents, be polyamine epichlorohydrin resin (PAE) such as wet strength agent, consumption is 1.0% of oven dry stock mass fraction; Plasticizer is tetraglycidel ether epoxy resin, and consumption is 0.7% of oven dry stock mass fraction; Short degradation agent cellulase consumption is 3% of oven dry stock mass fraction.In the digestion process, heating-up time 50min for the first time, intensifications that as far as possible remain a constant speed is incubated 95min when temperature reaches 105～110 ℃.Heating-up time 5min for the second time, when temperature reaches 118 ± 2 ℃, insulation 20min, steam bleeding immediately after the end.Cotton fiber flushing with boiling, the flush away loose colour, certain cotton fiber is put into beater pulls an oar, 30～50 ° of SR of beating degree control, the cotton pulp of accomplishing fluently is dried to decide the grammes per square metre of cotton mulch film, the cotton fiber of the certain grammes per square metre of weighing is put into the fiber dissociation device and is diluted to dissociate and make the suspension of fiber pulp again, this liquid poured into copy in the paper device, filtering moisture obtains wet fiber net, squeeze out wherein moisture and air through hydraulic press, put into dryer and dry 2min, carefulness strips and can obtain paper substrate cotton mulch film sample semi-finished product.Be immersed at last in 2～8% polyvinyl alcohol (PVA) the applying glue liquid, employing two is soaked two techniques of rolling and is carried out the mangle arrangement, sample after the arrangement is placed in the baking oven of uniform temperature, the preliminary drying certain hour, glue is fully binded on cotton mulch film sample surface, then at room temperature dry and namely obtain grammes per square metre at 30 ± 5g/m
2The cotton mulch film.
Claims (4)
1. one kind high WATER REPELLENCY high light transmittance biodegradation cotton agricultural film, it is characterized in that: take cotton fiber as main raw material, add the function additives such as an amount of wet strength agent, plasticizer, adopt wet papermaking process to be prepared into semi-finished product, process and form through atoleine dipping, polyvinyl alcohol (PVA) applying glue again.
2. cotton thin film technology technique according to claim 1 is characterized in that: wet papermaking process adopts to steam and floats the pulping way of one, with alkaline boiling cotton pulp material.NaOH is the main component of cooking liquor, hydrogen peroxide is bleaching agent, wherein alkali charge is 3～7%, the hydrogen peroxide consumption is 6～9%, dodecyl sodium sulfate consumption 1～3%, dicyandiamide consumption 0.1～0.3%, ethylenediamine tetra-acetic acid (EDTA) consumption 0.05～0.1%, anthraquinone consumptions 0.02～0.05% etc., liquor ratio is about 1: 5.
3. the function additive that adds in the cotton film preparation process according to claim 1 is characterized in that: wet strength agent is polyamine epichlorohydrin resin (PAE), and consumption is oven dry stock mass fraction 0.8～1.5%; Plasticizer is tetraglycidel ether epoxy resin, and consumption is oven dry stock mass fraction 0.5～1.0%; Short degradation agent cellulase consumption is oven dry stock mass fraction 1～5%.
4. cotton thin film technology technique according to claim 1, thereafter arrangement is characterised in that: adopt one to soak one and roll and carry out the atoleine impregnation process semi-products, use 2.0～8.0% polyvinyl alcohol (PVA) solution to adopt two to soak two roll process and carry out applying glue and put in order after naturally drying again.
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| CN 201210524256 CN102943414A (en) | 2012-12-10 | 2012-12-10 | High-water repellency high-photopermeability biodegradable cotton agricultural thin film |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120629A (en) * | 2014-07-17 | 2014-10-29 | 陆振飞 | Preparation method of sizing agent for germinating paper |
| CN104387605A (en) * | 2014-10-23 | 2015-03-04 | 夏世勇 | Biodegradable agricultural plastic film with surface cover film |
| CN105178094A (en) * | 2015-06-17 | 2015-12-23 | 华南理工大学 | Agricultural degradable thermal-insulation mulch film manufacturing method |
| CN105821700A (en) * | 2016-03-28 | 2016-08-03 | 新疆国力源环保科技有限公司 | Method for making degradable ground film paper from cotton linters |
| CN109845551A (en) * | 2019-01-18 | 2019-06-07 | 甘肃省农业科学院旱地农业研究所 | A kind of degradable liquid-state mulch film and its application method |
| CN111287016A (en) * | 2020-03-12 | 2020-06-16 | 昆明理工大学 | Preparation method of agricultural fully-degradable paper-based modified mulching film |
| CN111719240A (en) * | 2020-06-10 | 2020-09-29 | 魏常炬 | Chemical fiber degradable membrane and preparation method and application thereof |
-
2012
- 2012-12-10 CN CN 201210524256 patent/CN102943414A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120629A (en) * | 2014-07-17 | 2014-10-29 | 陆振飞 | Preparation method of sizing agent for germinating paper |
| CN104387605A (en) * | 2014-10-23 | 2015-03-04 | 夏世勇 | Biodegradable agricultural plastic film with surface cover film |
| CN105178094A (en) * | 2015-06-17 | 2015-12-23 | 华南理工大学 | Agricultural degradable thermal-insulation mulch film manufacturing method |
| CN105821700A (en) * | 2016-03-28 | 2016-08-03 | 新疆国力源环保科技有限公司 | Method for making degradable ground film paper from cotton linters |
| WO2017166859A1 (en) * | 2016-03-28 | 2017-10-05 | 新疆国力源投资有限公司 | Method for manufacturing degradable paper mulches using cotton linters |
| CN105821700B (en) * | 2016-03-28 | 2017-12-05 | 新疆国力源投资有限公司 | The method that cotton linter makes degradable mulch paper |
| CN109845551A (en) * | 2019-01-18 | 2019-06-07 | 甘肃省农业科学院旱地农业研究所 | A kind of degradable liquid-state mulch film and its application method |
| CN111287016A (en) * | 2020-03-12 | 2020-06-16 | 昆明理工大学 | Preparation method of agricultural fully-degradable paper-based modified mulching film |
| CN111719240A (en) * | 2020-06-10 | 2020-09-29 | 魏常炬 | Chemical fiber degradable membrane and preparation method and application thereof |
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Application publication date: 20130227 |