CN109023571A - A kind of composite fibre and its application in rice fly net - Google Patents
A kind of composite fibre and its application in rice fly net Download PDFInfo
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- CN109023571A CN109023571A CN201810935773.7A CN201810935773A CN109023571A CN 109023571 A CN109023571 A CN 109023571A CN 201810935773 A CN201810935773 A CN 201810935773A CN 109023571 A CN109023571 A CN 109023571A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
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- 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
- A01G13/10—Devices for affording protection against animals, birds or other pests
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/30—Scaring or repelling devices, e.g. bird-scaring apparatus preventing or obstructing access or passage, e.g. by means of barriers, spikes, cords, obstacles or sprinkled water
- A01M29/34—Scaring or repelling devices, e.g. bird-scaring apparatus preventing or obstructing access or passage, e.g. by means of barriers, spikes, cords, obstacles or sprinkled water specially adapted for insects
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/94—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of other polycondensation products
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- Life Sciences & Earth Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Insects & Arthropods (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Birds (AREA)
- Pest Control & Pesticides (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a kind of composite fibre and its application, composite fibre of the invention includes the chitosan particle that fiber-based material and partial size are 1-5 μm；Weight percent of the chitosan particle in composite fibre is 1-10wt%；The chitosan particle is made of chitosan, copper stearate and the europium ion that mass ratio is 1-2:0.1-0.5:0.02-0.05.Fly net of the invention has good barriering effect to insect, the milk particle agent for preventing planthopper is added in the fibre, it can guarantee fly net for a long time to the preventive effect of planthopper, furthermore the red spectrum reinforcing agent in the present invention can promote the growth of rice well.
Description
Technical field
The present invention relates to a kind of fiber and its application, in particular to a kind of insect prevention fiber and answering in rice fly net
With.
Background technique
Seedling-cultivation technique is isolated in rice application fly net, and not only effective ground resistance disconnected planthopper invasion rice seedling bed passed poison, but also can be isolated
Period does not need medication prevention and treatment, reduces pollution of the chemical pesticide to environment.It is the effective way for preventing rice pest." insect prevention
Application study of the net in Rice Production " in point out, fly net changes 99% to small brown rice planthopper vermins-proof effect, significantly improves rice shoot strain
High, tiller number.But fly net can not prevent the primary pest of the rice such as small brown rice planthopper, white plant hopper completely.
In addition, some researches show that preference feux rouges during paddy growth, such as " different spectral power distributions are to rice seedling
The influence of growth " in have studied influence to different spectrum and complex spectrum to Rice Production, rice fly net is usually at present
White fly net, white fly net can not enhance the red spectrum through fly net.Such as red enhancing is prepared using rare earth element
Mirror, as Chinese patent 2017104871880 provides a kind of water-setting that can send out red fluorescence prepared using rare-earth europium ion
Glue, but this method is directly boiled together in the fibre with modification of chitosan in application, be easy to causeing rare earth by rare-earth europium ion
Ion distribution is uneven, influences its using effect.
Summary of the invention
Goal of the invention: the present invention provides a kind of composite fibres for fly net.It is a further object of the present invention to provide
The application in rice fly net of the composite fibre.
Technical solution: a kind of composite fibre of the present invention, the composite fibre include fiber-based material and grain
The chitosan particle that diameter is 1-5 μm；Weight percent of the chitosan particle in composite fibre is 1-10wt%；The shell
Glycan particle is made of chitosan, copper stearate and the europium ion that mass ratio is 1-2:0.1-0.5:0.02-0.05.
Preferably, the composite fibre includes the milk particle agent for preventing and treating rice planthopper, and the milk particle agent is in composite fibre
In weight percent be 0.1-5wt%.
Preferably, the partial size of the milk particle agent is 200-300nm.
It preferably, include the granules of pigments of 0.1-0.5wt% in the composite fibre, it is preferable that the granules of pigments is
Red pigment particle, specially paratonere 104.
Preferably, the fibrous matrix is polyethylene fibre, acid fiber by polylactic or polyurethane fiber.
In order to which composition of the invention is further explained, the chitosan particle that can disclose the preparation method is as follows:
(1) chitosan, copper stearate and Europium chloride are dissolved in acetum, chitosan, copper stearate and europium ion
Mass ratio be 1-2:0.1-0.5:0.02-0.05；
(2) to the resulting mixed solution and dripping dilute alkaline soln of step (1), so that the pH of solution is 6.0-8.0；
(3) it by step (2) resulting solution, is concentrated, freeze-drying obtains chitosan particle and obtains chitosan particle.
It preferably, include 1-30% Diacloden in the milk particle agent.
Milk particle agent specifically can take following preparation method using any prior art preparation in the present invention:
Step 1: it prepares stable O/W lotion: styrene maleic anhydride copolymer being added to the water, in 5000-
It is dispersed with stirring under 7000rmp revolving speed, Diacloden is added, is emulsified with the shear rate of 8000-10000rmp, emulsification times are
30-40min obtains the lotion for stablizing O/W；
Step 2: ethyl cellulose being added into the lotion of the O/W of formation, adjusts pH value of solution to pH value 3-5, is in temperature
60-70 DEG C, polyase 13 6-48h is solidified；
Step 3: the solution after solidification is lyophilized, obtain include Diacloden milk particle agent.
The preparation method of composite fibre can be in the present invention are as follows: electrospinning process is meltblowing method.
Electrospinning process are as follows: mixed using the n,N-Dimethylformamide that volume ratio is 50:50 with tetrahydrofuran/chloroform
Solvent prepares 10wt% polyethylene fibre/polyurethane/polylactic acid solution, the chitosan particle/milk particle that will be prepared in the present invention
Agent/granules of pigments is added in solution and stirs, and is uniformly mixed and solution is then added in syringe simultaneously electrostatic spinning.
Melt-spraying spinning method are as follows: melt blowing machine is added in the raw material components of composite fibre and is meltblown, can be determined according to spray head
The diameter of final composite fibre, prepares the composite fibre of different-diameter.
Application of the above-mentioned composite fibre in rice fly net.
In barrier of the shading rate, ventilative rate and physical action for comprehensively considering fly net to pest and disease damage, it is preferable that the water
The rectangular aperture length of rice fly net is 0.29-0.95mm, and rectangular aperture width is 0.29-0.95mm.
Preferably, the shading rate of the rice fly net is 20-40%；The ventilative rate 30-60% of the rice fly net.
Primary pest in rice is planthopper, and type includes brown paddy plant hopper, small brown rice planthopper, white plant hopper, long wing adult figure
Size is 3.5mm-5mm, brachypterism type adult body size 2mm-4mm, and fly net can prevent and treat planthopper well, but in order to
Prevent other planthopper larvas in overwintering larva and environment, the sustained release granulars of anti-planthopper is added in fly net, into one
Step improves the control efficiency to planthopper.
The present invention has comprehensively considered the specification of suitable rice fly net, and a suitable rice is formed in fly net mesh enclosure
The micro climate of growth has suitable temperature, humidity, gas permeability, then gives rice more than under other white, Transparent color fly nets
Red spectrum, enable rice Fast Growth.
Unless otherwise indicated, " % " is mass percent in the present invention.
The utility model has the advantages that (1) present invention by increasing europium ion in the fibre, is improved through the strong of fly net red spectrum
Degree, improves rice yield；(2) present invention increases the milk particle agent of prevention and treatment rice planthopper in the fibre, increases fly net
Vermins-proof effect；(3) fly net of the invention is having insect prevention, and simultaneously, red spectrum is to the photosynthetic of rice in enhancing sunlight for sunshade
The influence of effect, rice being capable of Fast Growths.
Specific embodiment
One, prepared by raw material
1.1 the preparation of chitosan particle
Sample 1:
Step 1: the chitosan that average molecular weight is 20000KDa is dissolved in the acetum of 1mol/L, is added hard
Resin acid copper and Europium chloride dissolution, the mass ratio of chitosan, copper stearate and europium ion are 1:0.1:0.02.
Step 2: to the sodium hydroxide solution of mixed solution and dripping 0.1mol/L, so that the pH of solution is in 6.0-8.0.
Step 3: resulting solution is concentrated, and freeze-drying obtains chitosan particle.
Sample 2:
Step 1: the chitosan that average molecular weight is 20000KDa is dissolved in the acetum of 1mol/L, is added hard
Resin acid copper and Europium chloride dissolution, the mass ratio of chitosan, copper stearate and europium ion are 2:0.5:0.05.
Step 2: to the sodium hydroxide solution of mixed solution and dripping 0.1mol/L, so that the pH of solution is in 6.0-8.0.
Step 3: resulting solution is concentrated, and freeze-drying obtains chitosan particle.
Sample 3:
Step 1: the chitosan that average molecular weight is 20000KDa is dissolved in the acetum of 1mol/L, is added hard
Resin acid copper and Europium chloride dissolution, the mass ratio of chitosan, copper stearate and europium ion are 1.5:0.2:0.03.
Step 2: to the sodium hydroxide solution of mixed solution and dripping 0.1mol/L, so that the pH of solution is in 6.0-8.0.
Step 3: resulting solution is concentrated, and freeze-drying obtains chitosan particle.
Control sample 1:
Step 1: the chitosan that average molecular weight is 20000KDa is dissolved in the acetum of 1mol/L, chlorine is added
Change europium to dissolve, the mass ratio of chitosan and europium ion is 1.5:0.03.
Step 2: to the sodium hydroxide solution of mixed solution and dripping 0.1mol/L, so that the pH of solution is in 6.0-8.0.
Step 3: resulting solution is concentrated, and freeze-drying obtains chitosan particle.
Control sample 2:
Step 1: the chitosan that average molecular weight is 20000KDa is dissolved in the acetum of 1mol/L, is added hard
The mass ratio of resin acid copper dissolution, chitosan and europium ion is 1.5:0.2.
Step 2: to the sodium hydroxide solution of mixed solution and dripping 0.1mol/L, so that the pH of solution is in 6.0-8.0.
Step 3: resulting solution is concentrated, and freeze-drying obtains chitosan particle.
The preparation of 1.2 milk particle agent
Sample 4:
Step 1: it prepares stable O/W lotion: styrene maleic anhydride copolymer is added to the water, prepare styrene horse
Carry out the mixed solution that acid anhydride copolymer mass percent is 10%, be dispersed with stirring under 6000rmp revolving speed, Diacloden is added, with
The shear rate of 8000rmp is emulsified, and emulsification times 40min obtains the lotion for stablizing O/W；
Step 2: it is added into the lotion of the O/W of formation fine with styrene maleic anhydride copolymer ethyl identical in quality
Dimension element, adjusting pH value of solution are 3-5, are 60-70 DEG C in temperature, polyase 13 6-48h is solidified；
Step 3: the solution after solidification is lyophilized, obtain include active constituent be 20% Diacloden milk particle agent.
Two, sample preparation
Embodiment 1: the n,N-Dimethylformamide and chloroform mixed solvent for the use of volume ratio being 50:50 prepare 10wt%
It is molten to be added to polyurethane by polyurethane solutions for the milk particle agent of sample 4 prepared by the chitosan particle of the sample 1 of preparation, 1.2 parts
It is stirred in liquid, is uniformly mixed and is then added to solution in syringe and electrostatic spinning, obtain composite fibre, in composite fibre
Chitosan particle weight percent is 1wt%, and the milk particle agent weight percent in composite fibre is 0.1wt%.
Embodiment 2: the n,N-Dimethylformamide and chloroform mixed solvent for the use of volume ratio being 50:50 prepare 10wt%
It is molten to be added to polyurethane by polyurethane solutions for the milk particle agent of sample 4 prepared by the chitosan particle of the sample 2 of preparation, 1.2 parts
It is stirred in liquid, is uniformly mixed and is then added to solution in syringe and electrostatic spinning, obtain composite fibre, in composite fibre
Chitosan particle weight percent is 5wt%, and the milk particle agent weight percent in composite fibre is 3wt%.
Embodiment 3: the n,N-Dimethylformamide and chloroform mixed solvent for the use of volume ratio being 50:50 prepare 10wt%
It is molten to be added to polyurethane by polyurethane solutions for the milk particle agent of sample 4 prepared by the chitosan particle of the sample 3 of preparation, 1.2 parts
It is stirred in liquid, is uniformly mixed and is then added to solution in syringe and electrostatic spinning, obtain composite fibre, in composite fibre
Chitosan particle weight percent is 10wt%, and the milk particle agent weight percent in composite fibre is 5wt%.
Embodiment 4: the chitosan particle weight percent of sample 2 is 5wt% in composite fibre, the milk particle in composite fibre
Agent weight percent is 3wt%, and the weight percent of the granules of pigments paratonere 104 in composite fibre is 0.1wt%, remaining is same
Embodiment 2.
Embodiment 5: the chitosan particle weight percent of sample 2 is 5wt% in composite fibre, the milk particle in composite fibre
Agent weight percent is 3wt%, and the weight percent of the granules of pigments paratonere 104 in composite fibre is 0.3wt%, remaining is same
Embodiment 2.
Embodiment 6: the chitosan particle weight percent of sample 2 is 5wt% in composite fibre, the milk particle in composite fibre
Agent weight percent is 3wt%, and the weight percent of the granules of pigments paratonere 104 in composite fibre is 0.5wt%, remaining is same
Embodiment 2.
Comparative example 1: the chitosan particle weight percent of the sample 2 in composite fibre is 5wt%, remaining is the same as embodiment 2.
Comparative example 2: the milk particle agent weight percent in composite fibre is 3wt%, remaining is the same as embodiment 2.
Comparative example 3: the chitosan particle weight percent of control sample 1 is 5wt% in composite fibre, in composite fibre
Milk particle agent weight percent is 3wt%.
Comparative example 4: the chitosan particle weight percent of control sample 2 is 5wt% in composite fibre, in composite fibre
Milk particle agent weight percent is 3wt%.
Three, sample treatment
The washing of 3.1 samples
Composite fibre prepared by embodiment 2 is prepared into fly net No.1, composite fibre prepared by comparative example 3 prepares fly net
No. two, the composite fibre for preparing of comparative example 4 prepare fly net three, the aperture of fly net is rectangular aperture, the length of rectangular aperture
For 0.6mm, the width of rectangular aperture is 0.4mm.
Water-washing step: into the water by the fly net of preparation, under 25KHZ frequency, ultrasound 2 seconds stops surpassing as one for 3 seconds
The fly net of preparation is carried out 50 circulations of washing, the fly net after washing is dried by sound circulation, spare.
Fly net before washing and after washing is carried out to the laboratory test of 3.2 parts respectively, not add the hole tray of fly net
As space management.
3.2 laboratory test
By the sample by the processing of 3.1 parts, laboratory test is carried out, instrument is illumination box, selects plant height for 5-6cm
Rice seedling, seedling medium be raising rice seedlings dedicated substrate, provided, educated by Huai'an Chaimihe Agricultural Technology Development Co., Ltd.
Seedling disk is 32 holes, is cultivated after seedling transplantation in illumination box, and condition of culture is identical, and different seedling disks covers different anti-
Worm net does three groups of parallel tests, the upgrowth situation of investigation experiment front and back rice seedling.Condition of culture are as follows: temperature is 28 when illumination
± 2) DEG C, night temperature is 20+2 DEG C, relative humidity 85%, brightness time 12h/12h, the total 10d of light application time, measures after planting the 15th
It, randomly selects 30 plants of rice samples measurement form and index in same treatment respectively.
3.3 laboratory test results
As shown in table 1, measurement result is as shown in table 1.
Influence of the different fly nets of table 1 to paddy growth performance
| Different disposal | Plant height/cm | Diameter is thick/mm | Chlorophyll content/mgg-1 |
| The fly net No.1 of washing process | 22.2 | 3.11 | 2.61 |
| The fly net of washing process two | 18.7 | 2.90 | 2.01 |
| The fly net of washing process three | 16.1 | 2.75 | 1.99 |
| The fly net No.1 of non-washing process | 22.7 | 3.15 | 2.63 |
| The fly net of non-washing process two | 19.3 | 3.05 | 2.39 |
| The fly net of non-washing process three | 16.6 | 2.87 | 1.96 |
| Space management | 17.8 | 2.74 | 1.95 |
Fly net basic component is identical in above-mentioned test, but joined the chitosan particle of sample 2 in fly net No.1,
Wherein copper stearate can increase the complexing power of Europium chloride and chitosan, and the fly net that do not wash after ultrasound washing and is to water
The influence difference of rice growth ability is little, therefore the fly net can be used for a long time outdoors, the anti-rain erosion of active constituent therein.
Fly net two prepare for 3 composite fibre of comparative example, and the chlorine in the composite fibre of comparative example 3 in chitosan particle
When change europium is mixed with chitosan particle, copper stearate is not added, from laboratory test results as can be seen that copper stearate is not added
Europium chloride is huge to the growth effect difference of rice before washing and after washing, shows that copper stearate can increase Europium chloride and shell
Glycan is tightly combined, furthermore can from the Comparative result of result and the fly net No.1 that do not wash without fly net two before washing
To find out, copper stearate can also increase europium ion to the reinforcing effect of red spectrum.
It only joined copper stearate in composite fibre in fly net three, without significant increase before washing and after washing
The transmitance of red spectrum, to the growth of plant without obviously increasing.
Four, application effect is tested
4.1 field experiment methods
It tests and was carried out in 2016 in the agricultural base Hua Chang, rice varieties are normal agriculture round-grained rice 12, sowing on June 5, June 25
The growing state of investigation rice after 60d is transplanted in day transplanting.Each plantation plot area is 5.0m × 3.0m, each MPS process
The embodiment 1-6 of second part preparation, fly net made of the composite fibre of comparative example 1-2, each processing set 3 it is parallel, prevent
The aperture of worm net is rectangular aperture, and the width of a length of 0.7mm of rectangular aperture, rectangular aperture are 0.5mm, not cover fly net
Cell is as blank control.
The influence that the different fly nets of table 2 grow rice field
| Processing | Insect keeps away drive rate/% | Planthopper disease incidence/% | Plant height/cm | Diameter is thick/mm |
| Embodiment 1 | 99.0 | 0 | 61.4 | 3.3 |
| Embodiment 2 | 98.5 | 0 | 62.1 | 3.3 |
| Embodiment 3 | 99.1 | 0 | 65.2 | 3.8 |
| Embodiment 4 | 98.5 | 0 | 63.0 | 3.6 |
| Embodiment 5 | 99.3 | 0 | 62.8 | 3.5 |
| Embodiment 6 | 98.2 | 0 | 64.5 | 3.6 |
| Comparative example 1 | 98.1 | 0.85 | 61.1 | 3.2 |
| Comparative example 2 | 97.9 | 0 | 60.3 | 3.2 |
| Blank control | 0 | 4.5 | 58.4 | 3.1 |
From the results shown in Table 2, fly net of the invention to insect have good barriering effect, in the fibre plus
Enter to prevent the milk particle agent of planthopper, can guarantee for a long time fly net to the preventive effect of planthopper, it is furthermore red in the present invention
Color spectrum reinforcing agent can promote the growth of rice well.
Claims (10)
1. a kind of composite fibre, which is characterized in that the shell that the composite fibre includes fiber-based material and partial size is 1-5 μm
Glycan particle；Weight percent of the chitosan particle in composite fibre is 1-10wt%；The chitosan particle is by matter
Amount is formed than the chitosan, copper stearate and europium ion for being 1-2:0.1-0.5:0.02-0.05.
2. composite fibre according to claim 1, which is characterized in that the composite fibre includes for preventing and treating rice planthopper
Milk particle agent, weight percent of the milk particle agent in composite fibre be 0.1-5wt%.
3. composite fibre according to claim 2, which is characterized in that the partial size of the milk particle agent is 200-300nm.
4. composite fibre according to claim 1, which is characterized in that include 0.1-0.5wt% in the composite fibre
Granules of pigments.
5. composite fibre according to claim 1, which is characterized in that the fibrous matrix is polyethylene fibre, polylactic acid
Fiber or polyurethane fiber.
6. composite fibre according to claim 1, which is characterized in that the chitosan particle is prepared by following methods:
(1) chitosan, copper stearate and Europium chloride are dissolved in acetum, the matter of chitosan, copper stearate and europium ion
Amount is than being 1-2:0.1-0.5:0.02-0.05；
(2) to the resulting mixed solution and dripping dilute alkaline soln of step (1), so that the pH of solution is 6.0-8.0；
(3) it by step (2) resulting solution, is concentrated, freeze-drying obtains chitosan particle.
7. composite fibre according to claim 2, which is characterized in that include 1-30% Diacloden in the milk particle agent.
8. application of any composite fibre in rice fly net described in -7 according to claim 1.
9. the rice fly net of any fiber preparation described in -7 according to claim 1, which is characterized in that the rice fly net
Rectangular aperture length be 0.29-0.95mm, rectangular aperture width be 0.29-0.95mm.
10. rice fly net according to claim 9, which is characterized in that the shading rate of the rice fly net is 20-
40%；The ventilative rate 30-60% of the rice fly net.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024082087A1 (en) * | 2022-10-17 | 2024-04-25 | 山东金冠网具有限公司 | Preparation method for insect-proof net containing nano sustained-release agent |
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