CN106120477A - A kind of preparation method of slow release medicine carrying paper mulch sheet - Google Patents

A kind of preparation method of slow release medicine carrying paper mulch sheet Download PDF

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Publication number
CN106120477A
CN106120477A CN201610483977.2A CN201610483977A CN106120477A CN 106120477 A CN106120477 A CN 106120477A CN 201610483977 A CN201610483977 A CN 201610483977A CN 106120477 A CN106120477 A CN 106120477A
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mulch sheet
paper mulch
add
paper
concentration
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郭迎庆
林茂平
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Individual
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
    • D21H27/28—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures treated to obtain specific resistance properties, e.g. against wear or weather
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00—Protecting plants
    • A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
    • A01G13/0256—Ground coverings
    • A01G13/0268—Mats or sheets, e.g. nets or fabrics
    • A01G13/0275—Films
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D21C3/024—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes with NH3 or H2O
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/02—Material of vegetable origin
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/25—Cellulose
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/60—Waxes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Environmental Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Paper (AREA)

Abstract

The present invention relates to the preparation method of a kind of slow release medicine carrying paper mulch sheet, belong to ground field of membrane preparation.The method is with chalina and wood flour as raw material, paper mulch sheet carrier is prepared by paper process, it is coated with chlopyrifos with beet pectin and gelatin-compounded gel again and prepares pesticide slow-release microcapsule, and make microcapsule coating fluid, it is uniformly coated on paper mulch sheet carrier, i.e. obtain slow release medicine carrying paper mulch sheet after drying, the method prepares paper mulch sheet with pure biomass fiber for raw material, there is splendid biological degradability, solve plastic film to be difficult to degrade, cause the problem that soil block affects plant growth, slow-release microcapsule is prepared for wall material cladding pesticide with gelatin and beet pectin, the medicine dispersion that compensate for again tradition medicine carrying mulch film load is uneven, rate of release is quickly, the medicinal effects in later stage cannot be ensured, cause the deficiency of waste to a certain extent, have broad application prospects.

Description

A kind of preparation method of slow release medicine carrying paper mulch sheet
Technical field
The present invention relates to the preparation method of a kind of slow release medicine carrying paper mulch sheet, belong to ground field of membrane preparation.
Background technology
Along with the maturation of plastic film mulching technology is with perfect, the kind of mulch film is continuously increased, and functional mulching film is the most therewith Occurring, the method preparing functional mulching film at present mainly has following, and the first is by functional medicine and macromolecule resin Directly mix, use routine to prepare the mode blow molding of plastic film, but the mulch film medicament dispersion of preparation is uneven, production Inefficient and production difficulty is bigger.The second is to be sprayed, be coated with or use binding agent to be adhered to mould by functional medicine On material mulch film, although this method makes the uniformity of medicament obtain certain lifting, but, because medicament can only be attached to mulch film table Face, drug release rate is quickly, it is impossible to ensures the medicinal effects in later stage, causes waste to a certain extent.The third is first First functional medicine and macromolecule resin are made master batch, this master batch is joined macromolecule resin uses common film forming side Formula Blown Film, although the problem that first two method runs into can be solved, but the method requires that the temperature that medicament bears is higher, Limit use to a certain extent, and nondegradable macromolecule resin also can cause plastic pollution.Therefore developmental research Mulch film and the suitably functional medicine of degradability are the important channels solving these problems.
The plastics relic of agricultural mulching cannot be degraded in soil, and can remain 200～400 years, and residual film stays soil Earth reaches to a certain degree, fritter soil can be wrapped up, make soil compaction, and affect the growth of crop root, affect it To water and the absorption of nutrient substance, cause soil pollution, reduce quality and the yield of crops.
Paper mulch sheet is based on papermaking process, with Plant fiber as raw material, prepares one layer by the way of copy paper Vegetable fibre net, and add different auxiliary agents in the process, such as dry strength agent, wet strength agent, clarifier, adhesive etc., so Afterwards by squeezing, it is processed by the means such as be dried, and gives the mechanical strength needed for paper mulch sheet and light transmission, breathability, Heat insulating ability, soil moisture conservation property and unique degradability, it is also possible to add insecticide, herbicide etc. so that it is possess certain functional.
Summary of the invention
The technical problem that present invention mainly solves: be polrvinyl chloride, polyethylene at present conventional medicine carrying mulching film raw material, These plastics relics can not be degraded in soil voluntarily, and can be wrapped up by soil, makes soil block, affects plant growth, and And the medicine dispersion of its load is uneven, rate of release is quickly, it is impossible to ensures the medicinal effects in later stage, causes to a certain extent The present situation of waste, it is provided that the preparation method of a kind of slow release medicine carrying paper mulch sheet.The method with chalina and wood flour as raw material, Prepare paper mulch sheet carrier by paper process, then it is micro-to prepare pesticide slow-release with beet pectin and gelatin-compounded gel cladding chlopyrifos Capsule, and make microcapsule coating fluid, it is uniformly coated on paper mulch sheet carrier, the most i.e. obtains slow release medicine carrying paper mulch sheet, The method prepares paper mulch sheet with pure biomass fiber for raw material, has splendid biological degradability, solves plastic film It is difficult to degrade, causes soil block to affect the problem of plant growth, prepare slow with gelatin and beet pectin for wall material cladding pesticide Release microcapsules, the medicine dispersion that compensate for again tradition medicine carrying mulch film load is uneven, and rate of release is too fast, it is impossible to ensure the later stage Medicinal effects, causes the deficiency of waste to a certain extent, has broad application prospects.
In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is:
(1) weigh 3～4kg chalinas and be cut into the segment of 2～3cm, put in iron pan and add water to submerge, then add chalina gross mass 10～15% sodium hydroxide powder, it is heated to 95～100 DEG C, after soda boiling 30～50min, filters isolated filtering residue, will filter Slag loads plastic bag after soaking 2～3h with the suds of its volume 3～5 times, tans by the sun 5～6h, obtain bleaching after sealing under burning sun Chalina fiber；
(2) both are joined after above-mentioned prepared bleaching chalina fiber and wood flour being mixed for 3:1 in mass ratio overall In the distilled water of long-pending 8～10 times, then it is 0.3～0.5% to add liquid paraffin by addition, continuously adds mixed after stirring 3～5min Close liquid gross mass 0.2～0.4% polyacrylamide, after mix homogeneously, prepare suspension；
(3) above-mentioned prepared suspension is poured on copy paper device plain weave copper mesh, filter moisture and obtain wet fiber net and incite somebody to action with aerosol apparatus Mass concentration is that 30% hydroxymethyl cellulose solution is sprayed at web surface uniformly, puts into baking oven pre-at 105～110 DEG C After drying 50～60min, take off film and obtain paper mulch sheet crude product；
(4) above-mentioned prepared paper mulch sheet crude product is put into and use ironer mangle after liquid paraffin maceration tank impregnates 3～5min Arrange, left at room temperature 1～to be dipped in mass concentration after 2 days again be in 10% polyvinyl alcohol glue 5～10min, use ironer Secondary arranges, and the paper mulch sheet after arranging puts into baking oven, is dried overnight, obtains paper mulch sheet carrier at 70～80 DEG C, standby With；
(5) pull an oar after weighing 400～500g beet cleanings, beet pulp is moved into enzymatic vessel, add 500～600mL distilled water and 4 ～5g cellulase, at 35～40 DEG C, it being incubated enzymolysis 5～6h after stirring, enzymolysis uses filtered through gauze isolated after terminating Filtrate, then in filtrate, add its volume 2～dehydrated alcohol of 3 times, staticly settle overnight in the ice-water bath of 4～6 DEG C, and use Horizontal centrifuge is centrifugally separating to obtain beet pectin precipitation with 3000～4000r/min rotating speeds, obtains with vacuum drier is dried Beet pectin, standby；
(6) weigh 50～60g gelatin to be added in 2～3L distilled water, with concentration be 0.3mol/L salt acid for adjusting pH to 6～7, then add Enter the 50～80mL former medicines of chlopyrifos, put in high-speed shearing emulsion machine, in 55～65 DEG C of down cut emulsifyings 5～8min, obtain pre- Emulsion；
(7) above-mentioned pre-emulsion is moved into beaker, be placed in the water-bath of 50～60 DEG C, be placed on magnetic stirrer while stirring Add 40～50g standby beet pectins, stirring 3～5min after with concentration be 1mol/L acetum regulation pH to 3.0～ 3.5, move into and 4～6 DEG C of ice-water baths continue stirring reaction 20～30min, reaction is 0.5mol/L hydroxide by concentration after terminating Sodium solution regulation pH to 9～10, obtains mixed liquor；
(8) dripping 15～20mL mass concentrations in the mixed liquor under above-mentioned stirring is the formalin of 30%, curing reaction 25～35min, it is filtrated to get the wet capsule of chlopyrifos, then by the concentration obtaining the wet capsule of chlopyrifos and joining its volume 3～5 times is In 30% Lac ethanol solution, obtain chlorpyrifos microcapsule with ultrasonic disperse instrument with 200～300W power ultrasonic dispersions 20～30min Coating fluid；
(9) above-mentioned prepared chlorpyrifos microcapsule coating fluid is poured in tray, take standby paper mulch sheet carrier and be laid in painting On cloth liquid level, taking out after standing adsorption 2～3min, adsorption plane is placed in plane upward, with coating machine even spread 3 from left to right ～after 5 times, stand and i.e. obtain slow release medicine carrying paper mulch sheet after drying.
The physical property of the present invention: the slow release medicine carrying paper mulch sheet tensile index that the present invention prepares reaches 45～50N m2/ g, Tear index reaches 67～69mN m2/ g, burst index is 4～6KPa m2/ g, breathability is 4～5mL/min, wet strength index It is 24～28N m2/ g, after 40～50 days, Plastic-film disintegration rate is up to more than 90%, after 15～20 days pesticide slow-release rate reach 80% with On.
The invention has the beneficial effects as follows:
(1) the slow release medicine carrying paper mulch sheet that the present invention prepares prepares paper mulch sheet with pure biomass fiber for raw material, has pole Good biological degradability and breathability；
(2) the slow release medicine carrying paper mulch sheet raw material that the present invention prepares is easy to get, and preparation process environmental protection is with low cost；
(3) the slow release medicine carrying paper mulch sheet that the present invention prepares prepares the micro-glue of slow release with gelatin and beet pectin for wall material cladding pesticide Capsule, is uniformly dispersed on mulch film, and rate of release is slow, it is ensured that the medicinal effects in later stage, it is to avoid the waste of medicine, has wide Wealthy application prospect.
Detailed description of the invention
Weigh 3～4kg chalinas and be cut into the segment of 2～3cm, put in iron pan and add water to submerge, then add the total matter of chalina Amount 10～15% sodium hydroxide powder, be heated to 95～100 DEG C, after soda boiling 30～50min, filters isolated filtering residue, will Filtering residue loads plastic bag after soaking 2～3h with the suds of its volume 3～5 times, tans by the sun 5～6h, obtain drift after sealing under burning sun White chalina fiber；Two are joined after above-mentioned prepared bleaching chalina fiber and wood flour being mixed for 3:1 in mass ratio In the distilled water of person's cumulative volume 8～10 times, then it is 0.3～0.5% to add liquid paraffin by addition, continues after stirring 3～5min Add mixed liquor gross mass 0.2～0.4% polyacrylamide, after mix homogeneously, prepare suspension；Above-mentioned prepared suspension is fallen Enter on copy paper device plain weave copper mesh, filter moisture and obtain wet fiber net and be that 30% hydroxymethyl cellulose is molten with aerosol apparatus by mass concentration Liquid is sprayed at web surface uniformly, puts into baking oven and after preliminary drying 50～60min, takes off film and obtain paper mulch sheet at 105～110 DEG C Crude product；Above-mentioned prepared paper mulch sheet crude product is put into after liquid paraffin maceration tank impregnates 3～5min whole with ironer mangle Reason, left at room temperature 1～to be dipped in mass concentration after 2 days again be in 10% polyvinyl alcohol glue 5～10min, with ironer two Secondary arrangement, the paper mulch sheet after arranging is put into baking oven, is dried overnight, obtains paper mulch sheet carrier at 70～80 DEG C, standby； Pull an oar after weighing 400～500g beet cleanings, beet pulp is moved into enzymatic vessel, add 500～600mL distilled water and 4～5g fibres Dimension element enzyme, is incubated enzymolysis 5～6h at 35～40 DEG C after stirring, enzymolysis uses filtered through gauze isolated filtrate after terminating, In filtrate, add its volume 2～dehydrated alcohol of 3 times again, staticly settle overnight in the ice-water bath of 4～6 DEG C, and with horizontal Centrifuge is centrifugally separating to obtain beet pectin precipitation with 3000～4000r/min rotating speeds, obtains Radix Betae with vacuum drier is dried Pectin, standby；Weigh 50～60g gelatin to be added in 2～3L distilled water, with concentration be 0.3mol/L salt acid for adjusting pH to 6～7, Add the 50～80mL former medicines of chlopyrifos, put in high-speed shearing emulsion machine, in 55～65 DEG C of down cut emulsifyings 5～8min, To pre-emulsion；Above-mentioned pre-emulsion is moved into beaker, is placed in the water-bath of 50～60 DEG C, be placed on the stirring of magnetic stirrer top Limit add 40～50g standby beet pectins, stirring 3～5min after with concentration be 1mol/L acetum regulation pH to 3.0～ 3.5, move into and 4～6 DEG C of ice-water baths continue stirring reaction 20～30min, reaction is 0.5mol/L hydroxide by concentration after terminating Sodium solution regulation pH to 9～10, obtains mixed liquor；Dripping 15～20mL mass concentrations in mixed liquor under above-mentioned stirring is The formalin of 30%, curing reaction 25～35min, it is filtrated to get the wet capsule of chlopyrifos, then the addition of chlopyrifos wet capsule will be obtained Concentration to its volume 3～5 times is in 30% Lac ethanol solution, with ultrasonic disperse instrument with 200～300W power ultrasonic dispersions 20 ～30min obtains chlorpyrifos microcapsule coating fluid；Above-mentioned prepared chlorpyrifos microcapsule coating fluid is poured in tray, takes standby Paper mulch sheet carrier is laid on coating liquid level, takes out after standing adsorption 2～3min, and adsorption plane is placed in plane upward, with painting After cloth machine even spread 3 from left to right～5 times, stand and i.e. obtain slow release medicine carrying paper mulch sheet after drying.
Example 1
Weigh 3kg chalina and be cut into the segment of 2cm, put in iron pan and add water to submerge, then add chalina gross mass 10% hydroxide Sodium powder, is heated to 95 DEG C, after soda boiling 30min, filters isolated filtering residue, by the filtering residue suds of its volume 3 times Load plastic bag after soaking 2h, under burning sun, tan by the sun 5h after sealing, chalina fiber must be bleached；By above-mentioned prepared bleaching Fructus Luffae Flesh fiber and wood flour join after mixing for 3:1 in mass ratio in the distilled water of both cumulative volumes 8 times, then by addition are 0.3% adds liquid paraffin, continuously adds mixed liquor gross mass 0.2% polyacrylamide, prepare after mix homogeneously after stirring 3min Suspension；Above-mentioned prepared suspension is poured on copy paper device plain weave copper mesh, filter moisture and obtain wet fiber net and incite somebody to action with aerosol apparatus Mass concentration is that 30% hydroxymethyl cellulose solution is sprayed at web surface uniformly, puts into baking oven preliminary drying at 105 DEG C After 50min, take off film and obtain paper mulch sheet crude product；Above-mentioned prepared paper mulch sheet crude product is put in liquid paraffin maceration tank and impregnate Arranging with ironer mangle after 3min, left at room temperature is dipped in mass concentration again after 1 day be in 10% polyvinyl alcohol glue 5min, arranges with ironer secondary, and the paper mulch sheet after arranging puts into baking oven, is dried overnight at 70 DEG C, obtains paper substrate ground Membrane carrier, standby；Pull an oar after weighing 400g beet cleaning, beet pulp is moved into enzymatic vessel, add 500mL distilled water and 4g fiber Element enzyme, is incubated enzymolysis 5h at 35 DEG C after stirring, enzymolysis uses filtered through gauze isolated filtrate after terminating, then in filtrate Add the dehydrated alcohol of its volume 2 times, staticly settle overnight in the ice-water bath of 4 DEG C, and with horizontal centrifuge with 3000r/min Rotating speed is centrifugally separating to obtain beet pectin precipitation, with the dried beet pectin that obtains of vacuum drier, standby；Weigh 50g gelatin to add In 2L distilled water, with concentration be 0.3mol/L salt acid for adjusting pH to 6, add the former medicine of 50mL chlopyrifos, put into high speed shear In mulser, in 55 DEG C of down cut emulsifying 5min, obtain pre-emulsion；Above-mentioned pre-emulsion is moved into beaker, is placed in the water-bath of 50 DEG C In Guo, it is placed on magnetic stirrer and adds the standby beet pectin of 40g while stirring, be 1mol/L by concentration after stirring 3min Acetum regulation pH to 3.0, moves into and continues stirring reaction 20min in 4 DEG C of ice-water baths, and reaction after terminating by concentration is 0.5mol/L sodium hydroxide solution regulation pH to 9, obtains mixed liquor；Mixed liquor under above-mentioned stirring drips 15mL mass Concentration is the formalin of 30%, curing reaction 25min, is filtrated to get the wet capsule of chlopyrifos, then will obtain the wet capsule of chlopyrifos and add The concentration entered to its volume 3 times is in 30% Lac ethanol solution, obtains with 200W power ultrasonic dispersion 20min with ultrasonic disperse instrument Chlorpyrifos microcapsule coating fluid；Above-mentioned prepared chlorpyrifos microcapsule coating fluid is poured in tray, takes standby paper mulch sheet Carrier is laid on coating liquid level, takes out after standing adsorption 2min, and adsorption plane is placed in plane upward, with coating machine from left to right After even spread 3 times, stand and i.e. obtain slow release medicine carrying paper mulch sheet after drying.
The slow release medicine carrying paper mulch sheet tensile index that the present invention prepares reaches 45N m2/ g, tear index reaches 67mN m2/ g, Burst index is 4KPa m2/ g, breathability is 4mL/min, and wet strength index is 24N m2/ g, after 40 days, Plastic-film disintegration rate can Reaching 91%, after 15 days, pesticide slow-release rate reaches 82%.
Example 2
Weigh 3kg chalina and be cut into the segment of 2cm, put in iron pan and add water to submerge, then add chalina gross mass 13% hydroxide Sodium powder, is heated to 98 DEG C, after soda boiling 40min, filters isolated filtering residue, by the filtering residue suds of its volume 4 times Load plastic bag after soaking 2h, under burning sun, tan by the sun 5h after sealing, chalina fiber must be bleached；By above-mentioned prepared bleaching Fructus Luffae Flesh fiber and wood flour join after mixing for 3:1 in mass ratio in the distilled water of both cumulative volumes 9 times, then by addition are 0.4% adds liquid paraffin, continuously adds mixed liquor gross mass 0.3% polyacrylamide, prepare after mix homogeneously after stirring 4min Suspension；Above-mentioned prepared suspension is poured on copy paper device plain weave copper mesh, filter moisture and obtain wet fiber net and incite somebody to action with aerosol apparatus Mass concentration is that 30% hydroxymethyl cellulose solution is sprayed at web surface uniformly, puts into baking oven preliminary drying at 108 DEG C After 55min, take off film and obtain paper mulch sheet crude product；Above-mentioned prepared paper mulch sheet crude product is put in liquid paraffin maceration tank and impregnate Arranging with ironer mangle after 4min, left at room temperature is dipped in mass concentration again after 2 days be in 10% polyvinyl alcohol glue 8min, arranges with ironer secondary, and the paper mulch sheet after arranging puts into baking oven, is dried overnight at 75 DEG C, obtains paper substrate ground Membrane carrier, standby；Pull an oar after weighing 450g beet cleaning, beet pulp is moved into enzymatic vessel, add 550mL distilled water and 4g fiber Element enzyme, is incubated enzymolysis 5h at 38 DEG C after stirring, enzymolysis uses filtered through gauze isolated filtrate after terminating, then in filtrate Add the dehydrated alcohol of its volume 2 times, staticly settle overnight in the ice-water bath of 5 DEG C, and with horizontal centrifuge with 3500r/min Rotating speed is centrifugally separating to obtain beet pectin precipitation, with the dried beet pectin that obtains of vacuum drier, standby；Weigh 55g gelatin to add In 2L distilled water, with concentration be 0.3mol/L salt acid for adjusting pH to 6, add the former medicine of 65mL chlopyrifos, put into high speed shear In mulser, in 60 DEG C of down cut emulsifying 7min, obtain pre-emulsion；Above-mentioned pre-emulsion is moved into beaker, is placed in the water-bath of 55 DEG C In Guo, it is placed on magnetic stirrer and adds the standby beet pectin of 45g while stirring, be 1mol/L by concentration after stirring 4min Acetum regulation pH to 3.3, moves into and continues stirring reaction 25min in 5 DEG C of ice-water baths, and reaction after terminating by concentration is 0.5mol/L sodium hydroxide solution regulation pH to 9, obtains mixed liquor；Mixed liquor under above-mentioned stirring drips 18mL mass Concentration is the formalin of 30%, curing reaction 30min, is filtrated to get the wet capsule of chlopyrifos, then will obtain the wet capsule of chlopyrifos and add The concentration entered to its volume 4 times is in 30% Lac ethanol solution, obtains with 250W power ultrasonic dispersion 25min with ultrasonic disperse instrument Chlorpyrifos microcapsule coating fluid；Above-mentioned prepared chlorpyrifos microcapsule coating fluid is poured in tray, takes standby paper mulch sheet Carrier is laid on coating liquid level, takes out after standing adsorption 2min, and adsorption plane is placed in plane upward, with coating machine from left to right After even spread 4 times, stand and i.e. obtain slow release medicine carrying paper mulch sheet after drying.
The slow release medicine carrying paper mulch sheet tensile index that the present invention prepares reaches 48N m2/ g, tear index reaches 68mN m2/ g, Burst index is 5KPa m2/ g, breathability is 4mL/min, and wet strength index is 26N m2/ g, after 45 days, Plastic-film disintegration rate can Reaching 93%, after 18 days, pesticide slow-release rate reaches 84%.
Example 3
Weigh 4kg chalina and be cut into the segment of 3cm, put in iron pan and add water to submerge, then add chalina gross mass 15% hydroxide Sodium powder, is heated to 100 DEG C, after soda boiling 50min, filters isolated filtering residue, by the filtering residue suds of its volume 5 times Load plastic bag after soaking 3h, under burning sun, tan by the sun 6h after sealing, chalina fiber must be bleached；By above-mentioned prepared bleaching Fructus Luffae Flesh fiber and wood flour join after mixing for 3:1 in mass ratio in the distilled water of both cumulative volumes 10 times, then press addition It is 0.5% addition liquid paraffin, continuously adds mixed liquor gross mass 0.4% polyacrylamide after stirring 5min, make after mix homogeneously Obtain suspension；Above-mentioned prepared suspension is poured on copy paper device plain weave copper mesh, filter moisture and obtain wet fiber net and use aerosol apparatus It is that 30% hydroxymethyl cellulose solution is sprayed at web surface uniformly by mass concentration, puts into baking oven preliminary drying at 110 DEG C After 60min, take off film and obtain paper mulch sheet crude product；Above-mentioned prepared paper mulch sheet crude product is put in liquid paraffin maceration tank and impregnate Arranging with ironer mangle after 5min, left at room temperature is dipped in mass concentration again after 2 days be in 10% polyvinyl alcohol glue 10min, arranges with ironer secondary, and the paper mulch sheet after arranging puts into baking oven, is dried overnight at 80 DEG C, obtains paper substrate ground Membrane carrier, standby；Pull an oar after weighing 500g beet cleaning, beet pulp is moved into enzymatic vessel, add 600mL distilled water and 5g fiber Element enzyme, is incubated enzymolysis 6h at 40 DEG C after stirring, enzymolysis uses filtered through gauze isolated filtrate after terminating, then in filtrate Add the dehydrated alcohol of its volume 3 times, staticly settle overnight in the ice-water bath of 6 DEG C, and with horizontal centrifuge with 4000r/min Rotating speed is centrifugally separating to obtain beet pectin precipitation, with the dried beet pectin that obtains of vacuum drier, standby；Weigh 60g gelatin to add In 3L distilled water, with concentration be 0.3mol/L salt acid for adjusting pH to 7, add the former medicine of 80mL chlopyrifos, put into high speed shear In mulser, in 65 DEG C of down cut emulsifying 8min, obtain pre-emulsion；Above-mentioned pre-emulsion is moved into beaker, is placed in the water-bath of 60 DEG C In Guo, it is placed on magnetic stirrer and adds the standby beet pectin of 50g while stirring, be 1mol/L by concentration after stirring 5min Acetum regulation pH to 3.5, moves into and continues stirring reaction 30min in 6 DEG C of ice-water baths, and reaction after terminating by concentration is 0.5mol/L sodium hydroxide solution regulation pH to 10, obtains mixed liquor；Mixed liquor under above-mentioned stirring drips 20mL matter Amount concentration is the formalin of 30%, and curing reaction 35min is filtrated to get the wet capsule of chlopyrifos, then will obtain the wet capsule of chlopyrifos The concentration joining its volume 5 times is in 30% Lac ethanol solution, disperses 30min with ultrasonic disperse instrument with 300W power ultrasonic Obtain chlorpyrifos microcapsule coating fluid；Above-mentioned prepared chlorpyrifos microcapsule coating fluid is poured in tray, takes standby paper substrate ground Membrane carrier be laid in coating liquid level on, after standing adsorption 3min take out, adsorption plane is placed in plane upward, with coating machine from a left side to After right even spread 5 times, stand and i.e. obtain slow release medicine carrying paper mulch sheet after drying.
The slow release medicine carrying paper mulch sheet tensile index that the present invention prepares reaches 50N m2/ g, tear index reaches 69mN m2/ g, Burst index is 6KPa m2/ g, breathability is 5mL/min, and wet strength index is 28N m2/ g, after 50 days, Plastic-film disintegration rate can After reaching 95%, 15～20 day, pesticide slow-release rate reaches 87%.

Claims (1)

1. the preparation method of a slow release medicine carrying paper mulch sheet, it is characterised in that concrete preparation process is:
(1) weigh 3～4kg chalinas and be cut into the segment of 2～3cm, put in iron pan and add water to submerge, then add chalina gross mass 10～15% sodium hydroxide powder, it is heated to 95～100 DEG C, after soda boiling 30～50min, filters isolated filtering residue, will filter Slag loads plastic bag after soaking 2～3h with the suds of its volume 3～5 times, tans by the sun 5～6h, obtain bleaching after sealing under burning sun Chalina fiber；
(2) both are joined after above-mentioned prepared bleaching chalina fiber and wood flour being mixed for 3:1 in mass ratio overall In the distilled water of long-pending 8～10 times, then it is 0.3～0.5% to add liquid paraffin by addition, continuously adds mixed after stirring 3～5min Close liquid gross mass 0.2～0.4% polyacrylamide, after mix homogeneously, prepare suspension；
(3) above-mentioned prepared suspension is poured on copy paper device plain weave copper mesh, filter moisture and obtain wet fiber net, then will with aerosol apparatus Mass concentration is that 30% hydroxymethyl cellulose solution is sprayed at web surface uniformly, puts into baking oven pre-at 105～110 DEG C After drying 50～60min, take off film and obtain paper mulch sheet crude product；
(4) above-mentioned prepared paper mulch sheet crude product is put into and use ironer mangle after liquid paraffin maceration tank impregnates 3～5min Arrange, left at room temperature 1～2 days, then to be dipped in mass concentration be in 10% polyvinyl alcohol glue 5～10min, use ironer Secondary arranges, and the paper mulch sheet after arranging puts into baking oven, is dried overnight, obtains paper mulch sheet carrier at 70～80 DEG C, standby With；
(5) pull an oar after weighing 400～500g beet cleanings, beet pulp is moved into enzymatic vessel, add 500～600mL distilled water and 4 ～5g cellulase, stir and be incubated at 35～40 DEG C after enzymolysis 5～6h with filtered through gauze isolated filtrate, then to Filtrate adds its volume 2～dehydrated alcohol of 3 times, staticly settles overnight in the ice-water bath of 4～6 DEG C, and use horizontal centrifugal Machine is centrifugally separating to obtain beet pectin precipitation with 3000～4000r/min rotating speeds, obtains beet pectin with vacuum drier is dried, Standby；
(6) weigh 50～60g gelatin to be added in 2～3L distilled water, with concentration be 0.3mol/L salt acid for adjusting pH to 6～7, then add Enter the 50～80mL former medicines of chlopyrifos, put in high-speed shearing emulsion machine, in 55～65 DEG C of down cut emulsifyings 5～8min, obtain pre- Emulsion；
(7) above-mentioned pre-emulsion is moved into beaker, be placed in the water-bath of 50～60 DEG C, be placed on magnetic stirrer while stirring Add 40～50g standby beet pectins, stirring 3～5min after with concentration be 1mol/L acetum regulation pH to 3.0～ 3.5, move into and 4～6 DEG C of ice-water baths continue stirring reaction 20～30min, reaction is 0.5mol/L hydroxide by concentration after terminating Sodium solution regulation pH to 9～10, obtains mixed liquor；
(8) dripping 15～20mL mass concentrations in the mixed liquor under above-mentioned stirring is the formalin of 30%, curing reaction 25～35min, it is filtrated to get the wet capsule of chlopyrifos, wetter for the chlopyrifos obtained capsule is joined its volume 3～concentration of 5 times It is in 30% Lac ethanol solution, obtains the micro-glue of chlopyrifos with ultrasonic disperse instrument with 200～300W power ultrasonic dispersions 20～30min Capsule coating fluid；
(9) above-mentioned prepared chlorpyrifos microcapsule coating fluid is poured in tray, take standby paper mulch sheet carrier and be laid in painting On cloth liquid level, taking out after standing adsorption 2～3min, adsorption plane is placed in plane upward, with coating machine even spread 3 from left to right ～after 5 times, standing is dried and is i.e. obtained slow release medicine carrying paper mulch sheet.
CN201610483977.2A 2016-06-28 2016-06-28 A kind of preparation method of slow release medicine carrying paper mulch sheet Pending CN106120477A (en)

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CN113529483A (en) * 2021-06-18 2021-10-22 山西农业大学 Preparation method of slow-release decomposed seedling raising mulching film

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