CN101735420A - Preparation method and application method of biomass liquid agricultural membrane material - Google Patents
Preparation method and application method of biomass liquid agricultural membrane material Download PDFInfo
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- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 claims description 5
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Abstract
The invention relates to a preparation method and an application method of biomass liquid agricultural membrane material. The preparation method comprises the following steps: selecting any compound of one or any two of plant polyose substances and soluble plant cellulose biomass as the raw materials, and catalyzing hydroxyl groups under alkaline condition at 50-95 DEG C to obtain biomass stromata slurry containing hydroxyl reactive bonds; and adding 5-10 wt% of aldehyde to the biomass stromata slurry to carry out the condensation polymerization reaction, thereby obtaining the aldehyde polycondensate which is the biomass liquid agricultural membrane material. The application method comprises the following steps: when spraying the biomass liquid agricultural membrane material, adding a solidification accelerant accounting for 0.25-1.0 wt% of the aldehyde polycondensate, mixing, diluting by 6-10 times, and spraying on the soil surface. The biomass liquid agricultural membrane prepared and applied in the invention can effectively enhance the soil moisture retaining capacity, thereby satisfying the moisture requirement for plant growth.
Description
Technical field
The present invention relates to be used to suppress the material preparation and the using method of the plastic film for agricultural use of soil water evaporation, relate in particular to the material preparation and the using method of biomass liquid agricultural membrane.
Background technology
Drought and water shortage is the main restricting factor of agricultural sustainable development in the world wide, and northern China drought-hit area water resources quantity and cultivated area account for 17% and 64% of the whole nation respectively.The average annual precipitation deficit 400mm in the area of present China 45%, irrigated farmland lack of water more than 300 hundred million m
3Agricultural water application efficiency is low simultaneously, soil moisture surface evaporation loss, and its amount generally accounts for 1/4～1/2 of crop total water consumption in the NORTHWEST CHINA semiarid zone, accounts for 55～65% of annual precipitation.Therefore, reducing soil water evaporation is the important step that improves the farmland water use efficiency.
The seventies in last century, follow the development of plastics industry, Japanese and American-European developed country begins plastic film applications in agriculture production.Membrane covering plantation have heat, water conservation, volume increase and enlarge the suitable effect of doing the district of crop, this The Application of Technology makes farm output and benefit obtain significantly increasing, and has brought the leap of agricultural productive force and the change of the mode of production.China has been applied to agriculture production with mulch film since the eighties in last century, the sustainable growth of plastic film mulching cultivation area has become plastic film mulching cultivation big country, not only scale is big, and the crop species that relates to is many, is maximum with the cotton film-covering cultivated area wherein, accounts for more than 70% of total overlay film area.Because highlighting of problem such as ultra-thin, frangible, not weather-proof; Add plastics agricultural mulching residual film in soil and constantly accumulate, residual film contaminated soil hinders farming, destroy the topsoil gong structure, hinder the liquid manure transporting, it is serious day by day influence problem such as growing of soil permeability and crop, to China's agricultural environment formation significant threat.
The thirties in 20th century, the former Soviet Union utilizes naphtha soap to suppress soil water evaporation, reduces moisture evaporation 60～70%.The forties, Britain was once studied with cationic asphalt emulsion earthing kind grass, but was difficult to promote because of costing an arm and a leg.After this between more than 20 year, scientific circles continue again to seek new pitch modifying agent, and have carried out many-sided further investigation.France, the U.S. etc. with polyacrylamide (PAM) utilize sprinkling irrigation, canal irrigation, mode such as spray is applied in soil surface, in order to suppress moisture evaporation, fixing soil prevents erosion, improves Soil structure, can save irrigation water 30～50%.Carried out the production of production domesticization liquid-state mulch film in 1998 at home first,, obtained extraordinary economical, societal benefits at the application test that 10 provinces and cities in the whole nation carry out liquid film.Use asphalt emulsion, nano level waste plastic mixture and polyacrylamide (PAM) etc., have good soil water evaporation and suppress validity, but exist dilution and secondary poor stability, more seriously the secondary pollution problem to farmland ecological environment receives much concern.Problems such as the exploitation of fully bio-degradable type novel material thus,, secondary are stable, dilution property and film-forming properties improvement are the emphasis that tackling key problem solves.
Along with society and economic progress; the raising of environmental protection consciousness; efficient, nontoxic, pollution-free, the inexpensive important requirement that becomes its application agriculture production of the development and use of environmental protection, biological degradation and the biomass resource that drop in the farmland, particularly chemistry water saving preparation.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation and using method of biomass liquid agricultural membrane material, this biomass liquid agricultural membrane can significantly reduce soil water evaporation, improve soil water code insurance accumulation of energy power, thereby supply with the sufficient water demand of plant growth.
In order to solve the problems of the technologies described above, the invention provides a kind of preparation method of biomass liquid agricultural membrane material, comprise: select one or both any mixture in vegetable polysaccharides material and the dissolving vegetable fibre cellulosic biomass starting material for use, in 50～95 ℃ temperature condition base catalysis hydroxyl, generate the sticking thing of the biomass-based chylema that contains the hydroxyl activity key; Add by weight at the sticking thing of described biomass-based chylema that 5～10% aldehyde carries out the condensation polymerization reaction, produce aldehyde bunching compound and be described biomass liquid agricultural membrane material, be used to suppress soil water evaporation, or be used for functional membrane material processing.
Preferably, the vegetable polysaccharides material is one or both any mixture in starch and the Rhizoma amorphophalli powder, in described vegetable polysaccharides material, add 50～100 times water by weight, the sticking body of slurry is made in gelatinization under 50～95 ℃ of temperature condition, the base catalysis hydroxyl promptly adds NaOH solution or KOH solution and even matter in the sticking body of slurry, wherein the ratio of the sticking body of slurry and NaOH solution or KOH solution is 700: 1 by weight～3.
Preferably, vegetable fibre cellulosic biomass starting material are one or more in bagasse, crop material and the processing of farm products residue, vegetable fibre cellulosic biomass starting material account for 100～150% of condensed polymer consumption by weight, after the base catalysis hydroxyl is about to by weight the mixing solutions thorough mixing of 5～10% described plant cellulose and NaOH and urea 1: 1 by weight～5, placed 12.0～24.0 hours, to disperse, to dissolve described plant cellulose.
Preferably, dissolving vegetable fibre cellulosic biomass starting material are with one or more straw pulps that are slurried in described bagasse, crop material and the processing of farm products residue with the physics method, fully even matter is to improve film forming thickness, toughness and the tensile strength that liquid agricultural membrane material sprays.
Preferably, the condensation polymerization reaction is about to formaldehyde solution to be added in the sticking thing of biomass-based chylema, and the condensation polymerization reaction is carried out in fully even matter mixing.
Preferably, also comprise: the biomass-based chylema of urea being added to base catalysis is glued in the polycondensation resultant of thing and formaldehyde, and the polycondensation of base catalysis urea and aldehyde under 50～95 ℃ of temperature condition is to reduce the formaldehyde residual content in the resultant.
Preferably, also comprise: water-soluble high-molecular material 5%～20% is added in the aldehyde bunching compound by weight, to increase the tensile strength of biomass liquid mould material; Water-soluble high-molecular material comprise urea formaldehyde polymer, aqueous alkide resin, polyvinyl acetate, aqueous polyurethane or polyvinyl alcohol wherein one or more.
In order to solve the problems of the technologies described above, the invention provides a kind of using method that adopts as the biomass liquid agricultural membrane of method for preparing, comprise: biomass liquid agricultural membrane is when spraying use, need to add the curing catalyst that accounts for aldehyde condensed polymer consumption 0.25～1.0% by weight, the whole back redilution that mixes sprays soil surface for 6～10 times, with the evaporation of the soil moisture that suppresses crop growth period; Curing catalyst comprises a kind of or many in strong acid ammonium salt compound, organic acid, Phenylsulfonic acid and the phosphoric acid.
In order to solve the problems of the technologies described above, the invention provides a kind of biomass agricultural is film forming preparation method, comprising: vegetable fibre cellulosic biomass starting material by prepared by physical method straw pulp matter, are copied system vegetable fibre film 10～20g/m
2The vegetable fibre film is soaked into complex liquid with polycondensation-resin to be soaked into, it is that the aqueous solution of 10～30% water-soluble high-molecular material mixture is composite by the aldehyde bunching compound of 70～200 parts of vegetable polysaccharides matrix and 10～150 parts of concentration that complex liquid is soaked in polycondensation-resin, and it is film forming that vegetable fibre film surface drying, the rolling after soaking into makes biomass agricultural.
Preferably, vegetable fibre cellulosic biomass starting material comprise one or more in bagasse, crop material and the processing of farm products residue; The aldehyde bunching compound of vegetable polysaccharides matrix is that sticking thing of biomass-based chylema and aldehyde are carried out condensation polymerization reaction generation, the sticking thing of biomass-based chylema adopts one or more in starch, Rhizoma amorphophalli powder and the solution Mierocrystalline cellulose, generates in 50～95 ℃ temperature condition base catalysis hydroxyls; The water-soluble high-molecular material mixture comprises a kind of singly the joining or multiple composite resin in aqueous polyurethane, urea formaldehyde polymer, aqueous alkide resin, the polyvinyl acetate.
Preferably, also comprise: soak in the complex liquid in polycondensation-resin and add 50～100ppm cypress oleyl alcohol, with prolong described agricultural be film forming use working lipe.
According to the biomass liquid agricultural membrane of the present invention's preparation, can reduce soil water evaporation effectively, improve soil water code insurance accumulation of energy power, thereby supply with the water demand of plant growth.
Embodiment
Below will be described in detail with the preparation and the using method of preferred embodiment to the soil surface covering material of inhibition moisture evaporation of the present invention.
Degree in following examples, ratio content or umber content as Special Statement not, all refer to content by weight.
Embodiment 1
Rhizoma amorphophalli powder 5g is added in the 3500ml water, and even quality prepares viscous solution under the temperature condition of 50 ℃ of heating; Slowly add the 1.0g NaOH solution that is dissolved in the 5ml water again, impel the viscous solution of konjaku biomass matrix to generate more hydroxyl activity key; Carry out condensation polymerization reaction 1 hour after the formaldehyde solution 200ml that adds 40% concentration mixes, produce konjaku-formaldehyde condensation polymer and close resultant.Afterwards, with the formaldehyde solution 140ml of 40% concentration with after urea 90g mixes, adding konjaku-formaldehyde condensation polymer to closes in the resultant, after the even matter of thorough mixing, under 60 ℃ temperature condition, carry out condensation polymerization reaction 1.5 hours, add the 25g polyvinyl alcohol that is dissolved in 800ml water again, insulation is 1.5 hours after the even matter of thorough mixing, makes product 4700g.
Konjaku-formaldehyde condensation polymer closes resultant as the liquid-state mulch film that suppresses soil water evaporation, and spraying needs when using to add solidifying agent (NH in konjaku-formaldehyde condensation polymer compound
4In Cl, acetate, oxalic acid, Phenylsulfonic acid or the phosphoric acid one or more), this solidifying agent accounts for 0.1～1.0% of konjaku-formaldehyde condensation polymer compound consumption by weight, whole again mixed diluting sprays soil surface for 6～10 times, with the evaporation of the soil moisture that suppresses crop growth period.
Add 100% crop material straw pulp or grass meal of konjaku-formaldehyde condensation polymer compound consumption, increase film forming thickness and film toughness that liquid soil surface covering material sprays.
Embodiment 2
Rhizoma amorphophalli powder 30g, starch 20g are added to respectively in 2000ml and the 1500ml water, even matter prepares viscous solution under the temperature condition of 60 ℃ of heating, add hydroxyl activation baggasse fiber cellulose solution again (after baggasse fiber 25g and 8%NaOH and 15% urea soln 60ml thorough mixing rub, placed 12.0 hours), mix even matter, this alkaline condition also impels the viscous solution of konjaku and starch biomass matrix to generate more hydroxyl activity key; After adding 40% formaldehyde solution 240ml then and mixing even matter, carry out condensation polymerization reaction 1.5 hours.Afterwards, 40% formaldehyde solution of 100ml is mixed with urea 82g, and the formaldehyde condensation polymer that adds konjaku-starch-baggasse fiber mixture to closes in the resultant, after the even matter of thorough mixing, under 70 ℃ temperature condition, carry out condensation polymerization reaction 3.5 hours, make product 4700g.
Preparation aqueous self-drying Synolac.Following composition is mixed even matter: 4～7 parts in 42～46 parts of behenic acids, 16～22 parts of tetramethylolmethanes, 15～17 parts of PA (Tetra hydro Phthalic anhydride), 15～18 parts of DMPA (dimethylol propionic acid) and phenylformic acid; Add 6 parts of backflow dimethylbenzene then, feed CO again
2Gas slowly is warming up to 180 ℃, react 1 hour again after; Being warming up to 205 ℃ reacted 2 hours again; And then be warming up to 225 ℃, after insulation esterification mensuration acid number reaches the 55mgKOH/g value range, Separation and Recovery dimethylbenzene, and the synthetics behind this separating dimethyl benzene reduced below the temperature to 120 ℃, add 9 parts of cis-butenedioic anhydride oil again, 120 ℃ are incubated 0.5 hour, under 60 ℃ of conditions, use in the triethylamine (TEA) afterwards and acid number 15min, add again and press propyl carbinol-propylene glycol monomethyl ether of 1.5: 1 of volumometer (PM) solubility promoter, adjusting resultant solid component content is 70～80% resin solution, add deionized water adjustment solids content after the even matter again and reach 60% scope, the even matter of thorough mixing makes aqueous alkide resin.
The formaldehyde condensation polymer of konjaku-starch-baggasse fiber mixture closes resultant 500g, adds aqueous alkide resin 5～150g, mixes even matter, makes vegetable polysaccharides matrix and Synolac polycondensation mixture.This mixture sprays the NH that need add polycondensation mixture consumption 0.25% when using as the liquid-state mulch film that suppresses moisture evaporation
4Cl and 0.5～1% aqueous alkide resin siccative, whole mixed diluting sprays soil surface for 6～10 times, with the evaporation of the soil moisture that suppresses crop growth period.
Embodiment 3
Rhizoma amorphophalli powder 20g, starch 35g are added to respectively in 2000ml and the 1500ml water, even matter prepares viscous solution under the temperature condition of 60～90 ℃ of heating, add hydroxyl activation baggasse fiber cellulose solution again (after baggasse fiber 45g and 5wt%NaOH-17wt% urea soln 60ml thorough mixing rub, placed 12.0 hours), mix even matter, this alkaline condition impels the viscous solution of konjaku and starch biomass matrix to generate more hydroxyl activity key; Add 40% formaldehyde solution 250ml mixing again and carry out condensation polymerization reaction 1.5 hours.Afterwards, the formaldehyde condensation polymer that 40% formaldehyde solution of 80ml is mixed with urea 82g and add konjaku-starch-baggasse fiber mixture to closes in the resultant, after the even matter of thorough mixing, under 60～90 ℃ temperature condition, carry out condensation polymerization reaction 3.5 hours, make product 4700g.
The formaldehyde condensation polymer of konjaku-starch-baggasse fiber mixture closes 80～150 parts of products, adds 15～20 parts of polyvinyl acetates, mixes even matter, makes the mixture of aldehyde polycondensation of vegetable polysaccharides matrix and polyvinyl acetate.This mixture sprays the NH that need add polycondensation mixture consumption 0.25～1.0% when using as the liquid-state mulch film that soil water evaporation suppresses
4Cl, whole mixed diluting sprays soil surface for 6～10 times, with the evaporation of the soil moisture that suppresses crop growth period.
Embodiment 4
Rhizoma amorphophalli powder 40g, starch 35g are added to respectively in 2000ml and the 1500ml water, even matter prepares viscous solution under the temperature condition of 60～90 ℃ of heating, add hydroxyl activation baggasse fiber cellulose solution again (behind crop material 50g and 6%NaOH and the 10% urea soln 90ml thorough mixing, placed 12.0 hours), mix even matter, this alkaline condition impels the viscous solution of konjaku and starch biomass matrix to generate more hydroxyl activity key, adds 40% formaldehyde solution 250ml mixing and carries out condensation polymerization reaction 1.5 hours.Afterwards, the formaldehyde condensation polymer that 40% formaldehyde solution of 80ml is mixed with urea 82g and add konjaku-starch-baggasse fiber mixture to closes in the resultant, after the even matter of thorough mixing, under 90 ℃ temperature condition, carry out condensation polymerization reaction 3.5 hours, make product 4700g.
The formaldehyde condensation polymer of konjaku-starch-baggasse fiber mixture is closed 100～150 parts on resultant, add 10～30 parts of aqueous polyurethane resins, mix even matter, make the mixture of aldehyde polycondensation of vegetable polysaccharides matrix and aqueous polyurethane.This mixture sprays the NH that need add polycondensation mixture consumption 0.2～0.6% when using as the liquid-state mulch film that soil water evaporation suppresses
4Cl, whole mixed diluting sprays soil surface for 6～10 times, with the evaporation of the soil moisture that suppresses crop growth period.
Embodiment 5
The manufacturing of biomass agricultural mulching (being film forming) by prepared by physical method straw pulp matter, is copied system vegetable fibre film (10～20g/m with crop material or bagasse etc.
2).The vegetable fibre film is with the solution immersion of 70～200 parts of vegetable polysaccharidess (starch, Rhizoma amorphophalli powder, solution Mierocrystalline cellulose) matrix aldehyde polycondensation with mixture 10～30% concentration of 10～150 parts of aqueous polyurethanes (or urea formaldehyde polymer or aqueous alkide resin or polyvinyl acetate or the composite hybrid resin of they different ratios), vegetable fibre film surface drying, rolling after soaking into make biomass agricultural mulching (being film forming), the agricultural straw fiber mulch film of these manufactured biomass can improve the water tolerance and the tensile strength of film.Polycondensation-resin soaks into and adds cypress oleyl alcohol (ultimate density 0.01% in the composite solution) in the complex liquid, can regulate and control the degradation resistant of agricultural mulching, and the use of film is prolonged working lipe.
Claims (11)
1. the preparation method of a biomass liquid agricultural membrane material, comprise: select one or both any mixture in vegetable polysaccharides material and the dissolving vegetable fibre cellulosic biomass starting material for use, in 50～95 ℃ temperature condition base catalysis hydroxyl, generate the sticking thing of the biomass-based chylema that contains the hydroxyl activity key; Add by weight at the sticking thing of described biomass-based chylema that 5～10% aldehyde carries out the condensation polymerization reaction, produce aldehyde bunching compound and be described biomass liquid agricultural membrane material, be used to suppress soil water evaporation, or be used for functional membrane material processing.
2. preparation method as claimed in claim 1, it is characterized in that, described vegetable polysaccharides material is one or both any mixture in starch and the Rhizoma amorphophalli powder, in described vegetable polysaccharides material, add 50～100 times water by weight, the sticking body of slurry is made in gelatinization under described 50～95 ℃ of temperature condition, described base catalysis hydroxyl promptly adds NaOH solution or KOH solution and even matter in the sticking body of described slurry, the ratio of the sticking body of wherein said slurry and described NaOH solution or KOH solution is 700: 1 by weight～3.
3. preparation method as claimed in claim 1, it is characterized in that, described vegetable fibre cellulosic biomass starting material are one or more in bagasse, crop material and the processing of farm products residue, described vegetable fibre cellulosic biomass starting material account for 100～150% of described condensed polymer consumption by weight, after described base catalysis hydroxyl is about to by weight the mixing solutions thorough mixing of 5～10% described plant cellulose and NaOH and urea 1: 1 by weight～5, placed 12.0～24.0 hours, to disperse, to dissolve described plant cellulose.
4. preparation method as claimed in claim 1, it is characterized in that, described dissolving vegetable fibre cellulosic biomass starting material are with one or more straw pulps that are slurried in described bagasse, crop material and the processing of farm products residue with the physics method, fully even matter is to improve film forming thickness, toughness and the tensile strength that described liquid agricultural membrane material sprays.
5. preparation method as claimed in claim 1 is characterized in that, described condensation polymerization reaction is about to formaldehyde solution to be added in the sticking thing of described biomass-based chylema, and described condensation polymerization reaction is carried out in fully even matter mixing.
6. preparation method as claimed in claim 5, it is characterized in that, also comprise: the biomass-based chylema of urea being added to base catalysis is glued in the polycondensation resultant of thing and described formaldehyde, the polycondensation of base catalysis urea and aldehyde under described 50～95 ℃ of temperature condition is to reduce the formaldehyde residual content in the described resultant.
7. preparation method as claimed in claim 5 is characterized in that, also comprises: water-soluble high-molecular material 5%～20% is added in the described aldehyde bunching compound, to increase the tensile strength of described biomass liquid mould material by weight; Described water-soluble high-molecular material comprise urea formaldehyde polymer, aqueous alkide resin, polyvinyl acetate, aqueous polyurethane or polyvinyl alcohol wherein one or more.
8. an employing is as the using method of claim 1 to 7 biomass liquid agricultural membrane of method preparation as described in each, it is characterized in that, described biomass liquid agricultural membrane is when spraying use, need to add the curing catalyst that accounts for described aldehyde condensed polymer consumption 0.25～1.0% by weight, the whole back redilution that mixes sprays soil surface for 6～10 times, with the evaporation of the soil moisture that suppresses crop growth period; Described curing catalyst comprises a kind of or many in strong acid ammonium salt compound, organic acid, Phenylsulfonic acid and the phosphoric acid.
9. biomass are agricultural is film forming preparation method, comprising: vegetable fibre cellulosic biomass starting material by prepared by physical method straw pulp matter, are copied system vegetable fibre film 10～20g/m
2Described vegetable fibre film is soaked into complex liquid with polycondensation-resin to be soaked into, it is that the aqueous solution of 10～30% water-soluble high-molecular material mixture is composite by the aldehyde bunching compound of 70～200 parts of vegetable polysaccharides matrix and 10～150 parts of concentration that complex liquid is soaked in described polycondensation-resin, and it is film forming that vegetable fibre film surface drying, the rolling after soaking into makes described biomass agricultural.
10. preparation method as claimed in claim 9 is characterized in that, described vegetable fibre cellulosic biomass starting material comprise one or more in bagasse, crop material and the processing of farm products residue; The aldehyde bunching compound of described vegetable polysaccharides matrix is that sticking thing of biomass-based chylema and aldehyde are carried out condensation polymerization reaction generation, the sticking thing of described biomass-based chylema adopts one or more in starch, Rhizoma amorphophalli powder and the solution Mierocrystalline cellulose, generates in 50～95 ℃ temperature condition base catalysis hydroxyls; Described water-soluble high-molecular material mixture comprises a kind of singly the joining or multiple composite resin in aqueous polyurethane, urea formaldehyde polymer, aqueous alkide resin, the polyvinyl acetate.
11. as claim 9 or 10 described preparation methods, it is characterized in that, also comprise: soak in the complex liquid in described polycondensation-resin and to add 50～100ppm cypress oleyl alcohol, with prolong described agricultural be film forming use working lipe.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103319738A (en) * | 2013-06-24 | 2013-09-25 | 稼禾生物股份有限公司 | Method for preparing regenerated cellulose composite membrane by crop straws |
| CN103965519A (en) * | 2014-05-16 | 2014-08-06 | 齐鲁工业大学 | Preparation method of regenerated cellulose reinforced starch film |
| WO2020001140A1 (en) * | 2018-06-27 | 2020-01-02 | 重庆盛方新材料科技有限公司 | Plant culture mat and preparation method thereof |
| CN111154148A (en) * | 2020-02-20 | 2020-05-15 | 齐鲁工业大学 | Preparation method of waterborne polyurethane modified starch-based liquid mulching film |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1219020C (en) * | 2001-10-30 | 2005-09-14 | 中国石油化工股份有限公司 | Liquid mulching film and its producing method |
| CN1357569A (en) * | 2001-12-30 | 2002-07-10 | 北京中宣绿环科技发展有限公司 | Degradable soil moisture preserving liquid film and its prepn |
| CN1195044C (en) * | 2002-06-10 | 2005-03-30 | 中国农业大学 | A liquid state mulching film forming material and method for preparing same |
| CN100443529C (en) * | 2006-10-20 | 2008-12-17 | 中国科学院长春应用化学研究所 | Multifunctional degradable liquid-state mulch film and its preparing method |
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- 2008-11-20 CN CN2008101800494A patent/CN101735420B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103319738A (en) * | 2013-06-24 | 2013-09-25 | 稼禾生物股份有限公司 | Method for preparing regenerated cellulose composite membrane by crop straws |
| CN103319738B (en) * | 2013-06-24 | 2017-11-21 | 稼禾生物股份有限公司 | The method that agricultural crop straw prepares regenerated cellulose composite film |
| CN103965519A (en) * | 2014-05-16 | 2014-08-06 | 齐鲁工业大学 | Preparation method of regenerated cellulose reinforced starch film |
| WO2020001140A1 (en) * | 2018-06-27 | 2020-01-02 | 重庆盛方新材料科技有限公司 | Plant culture mat and preparation method thereof |
| CN111154148A (en) * | 2020-02-20 | 2020-05-15 | 齐鲁工业大学 | Preparation method of waterborne polyurethane modified starch-based liquid mulching film |
| CN111154148B (en) * | 2020-02-20 | 2022-04-05 | 齐鲁工业大学 | Preparation method of waterborne polyurethane modified starch-based liquid mulching film |
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