CN104094828A - Antibacterial high polymer resin soilless culture substrate material and preparation method thereof - Google Patents
Antibacterial high polymer resin soilless culture substrate material and preparation method thereof Download PDFInfo
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- CN104094828A CN104094828A CN201410330414.0A CN201410330414A CN104094828A CN 104094828 A CN104094828 A CN 104094828A CN 201410330414 A CN201410330414 A CN 201410330414A CN 104094828 A CN104094828 A CN 104094828A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Abstract
The invention relates to an antibacterial high polymer resin soilless culture substrate material and a preparation method thereof, and belongs to a plant culture material. The material is solid wettable particles, the weight ratio between acrylic acid and a photocatalytic antibacterial active material is m(acrylic acid):m(photocatalytic antibacterial active material)=100:(2-10). The material has bactericidal effect of killing more than 93% of escherichia coli under natural light, and water absorption of running water is greater than 600%. The synthetic process is completed by acrylamide, sodium methallyl sulfonate, a crosslinking agent, an initiator, a dispersant and the like besides the acrylic acid and the photocatalytic antibacterial active material by means of reversed phase suspension polymerization, preferably potassium hydroxide and ammonia water are selected reagents, and preferably ion modified titanium dioxide is selected as the photocatalytic antibacterial active material. The material has an antibacterial and sterilization function under the conditions of natural light, and is high in water-holding capacity and long in service life.
Description
Technical field
The invention belongs to plant cultivation material, especially macromolecule resin soilless culture substrate material.
Background technology
Macromolecule resin soilless culture substrate, as the soil substitute of planting plants, except having the feature of general high hydroscopic resin, also will have many properties, as gel should have higher intensity and extensibility with carrying institute cultivated plant; What the water absorption rate of high power can slowly discharge with sticking supplies the required nutrient of plant growth, and is beneficial to root system perforation and expansion; There is antibacterial functions, can effectively dissolve plant root growth is grown to harmful bacterium, algae etc.But the synthetic resin of prior art is spent soil, the saturated rear algea and bacteria disease of easily growing that absorbs water, cyclic washing water-absorbing resin is very easily broken, and be no more than 1 year general service life.In Patents document, the crystal mud of patent of invention CN2004100521842 " crystal mud and its production and use " is acrylic acid, acrylamide, the crosslinking agent N being neutralized by sodium hydroxide part, N '-methylene-bisacrylamide is dissolved in water, add oxidant and reductant, the crystal spawn that reaction generates under low temperature or normal temperature, outward appearance is water white transparency, colourful transparent or colored translucent, the water content absorbing water after saturated is 96.0～99.5%, the ability that absorbs distilled water under its bone dry state is own wt 24～200 times.What the method was used is water solution polymerization process, and it does not pay attention to the algea and bacteria disease of the growing impact on product equally.
The photocatalysis antibacterial active material algae of can degrading, there is antibiotic and sterilizing performance, but pure semiconductor catalysis material can only just have antibiotic and sterilizing performance under ultraviolet lighting condition, and soilless culture substrate material is generally in indoor use, require material to there is antibiotic and sterilizing function under visible illumination condition, therefore, need to carry out modification to pure semiconductor catalysis material.Mainly contain three kinds of modes with modification mode modification: anion-modified; Cation-modified; Different kinds of ions modification altogether.The anion-modified B that adopts more, C, N, the oxygen 2p orbital hybridization in the p track of the nonmetalloids such as S and P and Photocatalytic Oxidation With Semiconductors thing semiconductor improves the conduction band position of hydridization molecule, this wide band gap semiconducter is had visible light-responded.The cation-modified Cr that adopt more, Ni, Fe, the magnesium-yttrium-transition metal that V etc. have a 3d electron orbit inserts an energy band in the band gap of broad-band gap oxide semiconductor makes its acquisition visible light-responded.Different kinds of ions altogether modification can, by two kinds and above anion or cation-modified, also can, by two kinds and above anion and cation modification altogether, change position of energy band by modification, and it can be responded Uv and visible light.Conductor photocatalysis material raw material anion-modified or cation-modified or the common modification modification of different kinds of ions is cheap and easy to get, Product Green environmental protection.
Summary of the invention
For the synthetic cultivation matrix with above-mentioned antibacterial activity performance, the object of the invention is the defect for existing macromolecule resin soilless culture substrate material, in the anti-phase suspension liquid of bridging property polyacrylate water-absorbing resin, introduce photocatalysis antibacterial material, carry out inverse suspension polymerization synthetic reaction, thereby a kind of antimicrobial form macromolecule resin soilless culture substrate material is provided.
Above-mentioned purpose of the present invention reaches in the following manner:
(1) antimicrobial form macromolecule resin soilless culture substrate material of the present invention
This host material is the compound prepared solid shape wettable particle of macromolecule resin and photocatalysis antibacterial active material, and wherein, the weight ratio of acrylic acid and photocatalysis antibacterial active material is m
acrylic acid: m
photocatalysis antibacterial active material=100:(2 ~ 10).
Described host material has more than 93% bactericidal action to Escherichia coli under natural daylight.
Described host material is more than 600% to the water absorption rate of running water.
(2) prepare the method for above-mentioned soilless culture substrate material
Each component and the weight percent content thereof of this host material are: 100 parts of acrylic monomers, acrylamide monomer is acrylic acid 30 ~ 40%, metering system sulfonic acid monomer is acrylic acid 5 ~ 15%, crosslinking agent is acrylic acid 0.01 ~ 0.12%, initator is acrylic acid 0.1 ~ 1.4%, and dispersant is 0.1 ~ 1.0% of acrylic acid weight;
Described crosslinking agent is N, any one in N '-methylene-bisacrylamide, N hydroxymethyl acrylamide;
Described initator is any one in potassium peroxydisulfate, sodium peroxydisulfate, ammonium persulfate;
Described dispersant is one or both mixing in Span-60, the Span-80 of HLB value 3 ~ 6;
The step of the method comprises:
(1) press the percentage by weight of host material, dispersant is joined in any one solvent in n-hexane, cyclohexane, heptane, be warmed up to 35 ~ 50 DEG C, and stir and make it dispersed, obtain oil phase;
(2) press the percentage by weight of host material, acrylic monomers solution and metering system sulfonic acid monomer solution are mixed, with any one in potassium hydroxide, ammoniacal liquor, sodium hydroxide be 6 ~ 8 for alkali lye regulates pH value, add successively acrylamide solution, crosslinking agent, initator, fully mixing and stirring, obtains water;
(3) water is joined in oil phase, add by weight percentage colloidal sol or the powder aqueous solution of 2 ~ 10% photocatalysis antibacterial active material of acrylic acid weight, fully mix, be warming up to 60 ~ 80 DEG C of initiated polymerizations, filter, washing, 80 ~ 120 DEG C are dry, pulverize and make macromolecule resin soilless culture substrate material.
Described method is that the described catalysis material of step (3) comprises:
(1) conductor photocatalysis material: TiO
2or ZnO or CdS or Fe
2o
3or ZnS or SiO
2or WO
3among any one;
(2) ion modification photocatalysis material of titanium dioxide: nitrogen modifying titanium dioxide or vanadium modifying titanium dioxide or nitrogen vanadium are total to any one in modifying titanium dioxide;
The one of above-mentioned photocatalysis antibacterial active material preferred ion modifying titanium dioxide, the colloidal sol of photocatalysis antibacterial active material or powder concentration of aqueous solution are 5% of acrylic acid weight.
Described method is that preferred described metering system sulfonic acid monomer consumption is 10% of acrylic acid weight.
Described method is that preferred described dosage of crosslinking agent is 0.06% of acrylic acid weight.
Described method is that preferred described initiator amount is 0.7% of acrylic acid weight.
Described method is that preferred described dispersant dosage is 0.5% of acrylic acid weight.
In above content, conductor photocatalysis material, as ZnO, CdS, Fe
2o
3, ZnS, SiO
2, WO
3also protected as a part for catalysis material Deng metal oxide or sulphide, although there is no embodiment, these materials and TiO
2be the catalysis material of same type, there is akin technique effect.
The present invention has following substantive distinguishing features and marked improvement:
The present invention adds photocatalysis antibacterial material preparing in soilless culture substrate process, can ensure that anti-biotic material is dispersed inside and outside resin, obtains composite.This material has antibacterial functions, can effectively dissolve plant root growth is grown to harmful bacterium, algae etc., can kill and the growing of the harmful substances such as anti-bacteria.Experiment in cultivation result shows: plant grows fine, and has no the harmful microorganism such as bacterium, algae and grow in vase, and plant root also has no corruption, and effect is better.Not only for plant provides good growing environment, and matrix needn't cyclic washing, has avoided the fragmentation that causes, has extended service life.
Sulfonic acid group hydrophily is higher than hydroxy-acid group and hydroxyl, the present invention adopts via Inverse-Phase Suspension Polymerization, introduce appropriate sulphonic acids monomer, prepared material is more than 600 times to the water suction multiple of running water, this numerical value is the water absorbent rate to 24 ~ 200 times of distilled water higher than prior art crystal mud, the large multiplying power nutrient of soilless culture substrate sticking slowly discharges for plant normal growth, improve the availability of soilless culture substrate saturated capacity and fertilizer, extended soilless culture substrate once saturated water-filling service time.
The present invention preferably uses potassium hydroxide and aqueous ammonia to replace sodium hydroxide to regulate pH value, and potassium ion and ammonium radical ion can be used as the required nitrogen of plant, phosphorus, potash fertilizer for plant growth.
The present invention is harmless to human body and animals and plants, passes into disuse, and environment is had no adverse effects.Matrix of the present invention is transparent, and photocatalysis antibacterial material has repelled bacterium, algae etc., and considerable plant root growth situation strengthens sight.
Need nitrogen different with vacuum drying from the preparation of many macromolecule resins; synthesized polymer process of the present invention is without nitrogen or other inert gas shieldings; and product is without vacuum drying; under normal pressure, 80 ~ 120 DEG C are dried; simplify technology and equipment; reduce product cost, be convenient to suitability for industrialized production.
Brief description of the drawings
Fig. 1 is antimicrobial form macromolecule resin soilless culture substrate infrared spectrogram.In figure, a is pure titinium dioxide antimicrobial form soilless culture substrate; B is nitrogen vanadium modifying titanium dioxide antimicrobial form soilless culture substrate altogether.Wherein, 3443cm
-1place is the stretching vibration peak of hydroxyl O-H key; 2946cm
-1place is C-H symmetrical stretching vibration peak; 1679cm
-1place is amide group (CONH
2) middle carbonyl (C=O) stretching vibration absworption peak; 1627cm
-1place is the characteristic absorption peak of titanium dioxide surface-OH; 1576cm
-1place is carboxyl anion (COO
-) middle carbonyl (C=O) stretching vibration absworption peak; 1407cm
-1place is amide group (CONH
2) middle C-N key stretching vibration peak; 1167cm
-1for S=O key stretching vibration absworption peak in sulfonic acid group; 1085 cm
-1place is C=S key stretching vibration peak.In figure the characteristic peak of titanium dioxide a little less than, illustrate that titanium dioxide is bonded on macromolecule resin.
Fig. 2 is the macromolecule resin soilless culture substrate epipremnum aureum experiment in cultivation photo without photocatalysis antibacterial agent.
Fig. 3 is nitrogen vanadium modifying titanium dioxide antimicrobial macromolecule resin soilless culture substrate epipremnum aureum experiment in cultivation photo altogether.
Fig. 4 is vanadium modifying titanium dioxide antimicrobial macromolecule resin soilless culture substrate epipremnum aureum experiment in cultivation photo.
Through the test period of 3 wheat harvesting periods, obviously visible a large amount of algae bacteria breed, breedings in Fig. 1, and have no algae bacterium in Fig. 2 and Fig. 3, illustrates that photocatalysis antibacterial macromolecule resin matrix of the present invention has sterilization, antibacterial, the function that suppresses algal grown.
Fig. 5 is the white palm test of zinc oxide antimicrobial form macromolecule resin soilless culture substrate cultivation photo.
Fig. 6 is the white palm test of pure titinium dioxide antimicrobial form macromolecule resin soilless culture substrate cultivation photo.
Fig. 7 is the nitrogen vanadium white palm test of modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate cultivation photo altogether.
Fig. 8 is the white palm test of nitrogen modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate cultivation photo.
Fig. 9 is the white palm test of vanadium modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate cultivation photo.
Figure 10 is coreopsis seed germination experiment photo.
Figure 11 is tomato seeds germination test photo.
Figure 12 is Germination of Celery Seeds test photo.
Figure 13 is clover seed germination experiment photo.
Figure 14 is multicolored chrysanthemum seed germination experiment photo.
Figure 15 is romaine lettuce seed germination experiment photo.
Figure 16 is heronsbill seed germination experiment photo.
Figure 17 is violet stock violet seed germination experiment photo.
Figure 18 is kept upright less than supporting role photo with the plant of the about 160cm of antimicrobial form macromolecule resin soilless culture substrate bearing height, heavily about 4kg.
Below in conjunction with embodiment, the present invention will be further described.
Embodiment
Embodiment 1:
0.18g dispersant Span-80 is added in the reaction vessel that fills 340g cyclohexane, be warmed up to 45 DEG C, fully mixing and stirring, obtains oil phase.
The metering system sulfonic acid solutions 11.7g that the acrylic acid solution 70g that is 50% by weight fraction is 30% with weight fraction mixes, and the potassium hydroxide solution that is 30% with weight fraction adjusting pH value is 6.5, adding weight fraction is 30% acrylamide solution 40.8g, the N that weight fraction is 10%, the ammonium persulfate solution 2.45g that N '-methylene-bisacrylamide solution 0.14g, weight fraction are 10%, fully mixing and stirring, obtains water;
Water is joined in oil phase, be 25% pure titinium dioxide powder solution 2.4g to adding weight fraction in mixed liquor, fully mixing and stirring, be warmed up to 70 DEG C of initiated polymerizations 1 ~ 1.5 hour, by product filter, washing, 80 ~ 120 DEG C are dry, pulverize and make pure titinium dioxide antimicrobial form macromolecule resin soilless culture substrate material.
Embodiment 2:
With embodiment 1 difference be that in mixed liquor, to add weight fraction be that 25% pure titinium dioxide powder solution 2.4g changes in mixed liquor and adds pure titinium dioxide colloidal sol 6g.
Embodiment 3:
By dispersant Span-80(Arlacel-80) 0.18g adds in the reaction vessel that fills 340g cyclohexane, is warmed up to 45 DEG C, and fully mixing and stirring, obtains oil phase;
The metering system sulfonic acid solutions 11.7g that the acrylic acid solution 70g that is 50% by weight fraction is 30% with weight fraction mixes, and the potassium hydroxide solution that is 30% with weight fraction adjusting pH value is 6.5, adding weight fraction is 30% acrylamide solution 40.8g, the N that weight fraction is 10%, the ammonium persulfate solution 2.45g that N '-methylene-bisacrylamide solution 0.14g, weight fraction are 10%, fully mixing and stirring, obtains water;
Water is joined in oil phase, be 25% nitrogen modifying titanium dioxide powder solution 2.4g to adding weight fraction in mixed liquor, fully mixing and stirring, be warmed up to 70 DEG C of initiated polymerizations 1 ~ 1.5 hour, by product filter, washing, 80 ~ 120 DEG C are dry, pulverize and make nitrogen modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate material.
Embodiment 4:
By dispersant Span-80(Arlacel-80) 0.18g adds in the reaction vessel that fills 340g cyclohexane, is warmed up to 45 DEG C, and fully mixing and stirring, obtains oil phase;
The metering system sulfonic acid solutions 11.7g that the acrylic acid solution 70g that is 50% by weight fraction is 30% with weight fraction mixes, and the potassium hydroxide solution that is 30% with weight fraction adjusting pH value is 6.5, adding weight fraction is 30% acrylamide solution 40.8g, the N that weight fraction is 10%, the ammonium persulfate solution 2.45g that N '-methylene-bisacrylamide solution 0.14g, weight fraction are 10%, fully mixing and stirring, obtains water;
Water is joined in oil phase, be 25% vanadium modifying titanium dioxide powder solution 2.4g to adding weight fraction in mixed liquor, fully mixing and stirring, be warmed up to 70 DEG C of initiated polymerizations 1 ~ 1.5 hour, by product filter, washing, 80 ~ 120 DEG C are dry, pulverize and make vanadium modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate material.
Embodiment 5:
By dispersant Span-80(Arlacel-80) 0.18g adds in the reaction vessel that fills 340g cyclohexane, is warmed up to 45 DEG C, and fully mixing and stirring, obtains oil phase;
The metering system sulfonic acid solutions 11.7g that the acrylic acid solution 70g that is 50% by weight fraction is 30% with weight fraction mixes, and the sodium hydroxide solution that is 30% with weight fraction adjusting pH value is 6.5, adding weight fraction is 30% acrylamide solution 40.8g, the N that weight fraction is 10%, the ammonium persulfate solution 2.45g that N '-methylene-bisacrylamide solution 0.14g, weight fraction are 10%, fully mixing and stirring, obtains water;
Water is joined in oil phase, be 25% nitrogen vanadium modifying titanium dioxide powder solution 2.4g altogether to adding weight fraction in mixed liquor, fully mixing and stirring, be warmed up to 70 DEG C of initiated polymerizations 1 ~ 1.5 hour, by product filter, washing, 80 ~ 120 DEG C are dry, pulverize and make nitrogen vanadium modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate material altogether.
Embodiment 6:
By dispersant Span-80(Arlacel-80) 0.18g adds in the reaction vessel that fills 340g cyclohexane, is warmed up to 45 DEG C, and fully mixing and stirring, obtains oil phase;
The metering system sulfonic acid solutions 11.7g that the acrylic acid solution 70g that is 50% by weight fraction is 30% with weight fraction mixes, and the sodium hydroxide solution that is 30% with weight fraction adjusting pH value is 6.5, adding weight fraction is 30% acrylamide solution 40.8g, the N that weight fraction is 10%, the ammonium persulfate solution 2.45g that N '-methylene-bisacrylamide solution 0.14g, weight fraction are 10%, fully mixing and stirring, obtains water;
Water is joined in oil phase, be 30% oxide powder and zinc liquid solution 2.4g to adding weight fraction in mixed liquor, fully mixing and stirring, be warmed up to 70 DEG C of initiated polymerizations 1 ~ 1.5 hour, by product filter, washing, 80 ~ 120 DEG C are dry, pulverize and make zinc oxide antimicrobial form macromolecule resin soilless culture substrate material.
Embodiment 7:
By dispersant Span-80(Arlacel-80) 0.22g adds in the reaction vessel that fills 400g cyclohexane, is warmed up to 45 DEG C, and fully mixing and stirring, obtains oil phase;
The metering system sulfonic acid solutions 15g that the acrylic acid solution 90g that is 50% by weight fraction is 30% with weight fraction mixes, and the potassium hydroxide solution that is 30% with weight fraction adjusting pH value is 6.5, adding weight fraction is 30% acrylamide solution 48.5g, the N that weight fraction is 10%, the ammonium persulfate solution 3.15g that N '-methylene-bisacrylamide solution 0.20g, weight fraction are 10%, fully mixing and stirring, obtains water;
Water is joined in oil phase, be 25% nitrogen modifying titanium dioxide powder solution 3g to adding weight fraction in mixed liquor, fully mixing and stirring, be warmed up to 70 DEG C of initiated polymerizations 1 ~ 1.5 hour, by product filter, washing, 80 ~ 120 DEG C are dry, pulverize and make nitrogen modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate material.
Embodiment 8:
By dispersant Span-80(Arlacel-80) 0.22g adds in the reaction vessel that fills 400g cyclohexane, is warmed up to 45 DEG C, and fully mixing and stirring, obtains oil phase;
The metering system sulfonic acid solutions 15g that the acrylic acid solution 90g that is 50% by weight fraction is 30% with weight fraction mixes, and the potassium hydroxide solution that is 30% with weight fraction adjusting pH value is 6.5, adding weight fraction is 30% acrylamide solution 48.5g, the N that weight fraction is 10%, the ammonium persulfate solution 3.15g that N '-methylene-bisacrylamide solution 0.20g, weight fraction are 10%, fully mixing and stirring, obtains water;
Water is joined in oil phase, in mixed liquor, add nitrogen vanadium modified titanium dioxide sol 10g altogether, fully mixing and stirring, be warmed up to 70 DEG C of initiated polymerizations 1 ~ 1.5 hour, by product filter, washing, 80 ~ 120 DEG C are dry, pulverize and make nitrogen modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate material.
Embodiment 9:
By dispersant Span-80(Arlacel-80) 0.14g adds in the reaction vessel that fills 320g cyclohexane, is warmed up to 45 DEG C, and fully mixing and stirring, obtains oil phase;
The metering system sulfonic acid solutions 10.4g that the acrylic acid solution 70g that is 50% by weight fraction is 30% with weight fraction mixes, and the potassium hydroxide solution that is 30% with weight fraction adjusting pH value is 6.5, adding weight fraction is 30% acrylamide solution 36.4g, the N that weight fraction is 10%, the ammonium persulfate solution 2.10g that N '-methylene-bisacrylamide solution 0.12g, weight fraction are 10%, fully mixing and stirring, obtains water;
Water is joined in oil phase, in mixed liquor, add vanadium modified titanium dioxide sol 6g, fully mixing and stirring, be warmed up to 70 DEG C of initiated polymerizations 1 ~ 1.5 hour, by product filter, washing, 80 ~ 120 DEG C are dry, pulverize and make nitrogen modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate material.
Application test effect of the present invention has following several aspect:
(1) water holding effect of the present invention
After host material water suction, slowly discharge and absorb for plant, in the course of cultivation, can be according to root system of plant the demand to air, adjust the multiplying power of host material water suction, form bubble, ensure the respiration of root system of plant.After the water absorption that reaches capacity, hole still can keep large quantity of air space, in order to perforation and the expansion of root system.
Water absorption rate test: accurately take matrix that 1.0 g are dry in 1000mL beaker, add the running water of certain volume, stir 5min, under room temperature, leave standstill 1 hour, be filtered to without water droplet and drip by 100 order nylon filter bag, matrix is transferred in culture dish, and matrix weight after must absorbing water after weighing, calculates water absorption rate by formula.Water absorption rate computing formula is:
The result of different substrates material sticking running water multiplying power is as shown in table 1.
The sticking water retention of table 1 different substrates material to running water
| Host material | Saturated sticking running water multiplying power/(g/g) |
| Pure titinium dioxide antimicrobial form matrix | 683 |
| Nitrogen modifying titanium dioxide antimicrobial form matrix | 715 |
| Vanadium modifying titanium dioxide antimicrobial form matrix | 674 |
| Nitrogen vanadium is modifying titanium dioxide antimicrobial form matrix altogether | 698 |
| Zinc oxide antimicrobial form matrix | 705 |
(2) bactericidal property of host material of the present invention under different illumination conditions
Bactericidal property with reference to " evaluation of GB/T 23763-2009 photocatalysis antibacterial material and goods anti-microbial property " test host material of the present invention under different illumination conditions, test adopts plating method, and step is as follows:
Prepare bacteria suspension initial concentration 1 × 10
7the colibacillary initial bacteria suspension of cfu/mL, takes out initial bacteria suspension, adds sterile purified water and is diluted to 10
5the cfu/mL order of magnitude, as former state bacteria suspension; Preparation LB solid culture medium, for subsequent use after high-pressure sterilizing pot sterilizing.Take a certain amount of photocatalysis antibacterial macromolecule resin matrix and put into small beaker, add 100mL distilled water, shake up, then add 10mL former state bacteria suspension and mix, be mixed with antibacterial experiment bacteria suspension.Preparation simultaneously does not add the blank bacteria suspension of photocatalysis antibacterial macromolecule resin matrix.
By parallel the beaker that experimental bacteria suspension and blank bacteria suspension are housed be placed on respectively ultraviolet light, natural daylight, fluorescent lamp under irradiate certain hour, stir, after matrix and bacterium liquid fully being mixed contact, from each bacteria suspension, draw 1mL with pipettor respectively, do 10 times of dilutions at every turn, increase progressively and be diluted to 10 successively
3with 10
4doubly, water dropper and the beaker of a sterilizing once changed in every dilution.
LB solid culture medium is poured in the culture dish of sterilizing, until temperature is cool while putting 45 DEG C of left and right, drawn 1mL dilution bacteria suspension with the pipettor of drawing this dilution and move into culture dish, after jog mixes it, then cover the upper cover of culture dish.For guaranteeing that data are effective, each dilution factor all does 3 Duplicate Samples.After culture medium solidifying, flat-plate inverted is placed in the incubator of 37 DEG C and cultivates 24h.Culture dish is placed on colonometer and is counted, with the blank bacteria suspension sample in contrast of irradiation in 0 hour, pass through plate count simultaneously.
Antibiotic rate computing formula is:
In formula:
c 1the dull and stereotyped cultivation of the bacteria suspension colony counting of-blank assay;
c 2the dull and stereotyped cultivation of bacteria suspension colony counting after-antibacterial experiment.
The result of table 2 shows: host material of the present invention has more than 93% bactericidal action to Escherichia coli under natural daylight.
Under table 2 different illumination conditions, host material is tested colibacillary bactericidal property
(3) effect of carrying out experiment in cultivation taking epipremnum aureum, the white palm as test plant
Fig. 2-4 are respectively without the macromolecule resin soilless culture substrate epipremnum aureum cultivation of photocatalysis antibacterial agent, nitrogen vanadium modifying titanium dioxide antimicrobial macromolecule resin soilless culture substrate epipremnum aureum and vanadium modifying titanium dioxide antimicrobial macromolecule resin soilless culture substrate epipremnum aureum experiment in cultivation photo altogether.Through the test period of 3 wheat harvesting periods, obviously visible a large amount of algae bacteria breed, breedings in Fig. 2, and have no algae bacterium in Fig. 3 and Fig. 4, illustrates that photocatalysis antibacterial macromolecule resin matrix of the present invention has sterilization, antibacterial, the function that suppresses algal grown.
Fig. 5-9 are respectively the white palm test of different antimicrobial form macromolecule resin matrix cultivations photo.From photo, can find out, after host material sticking moisture, form many bubbles not of uniform size, gas permeability is fine, can ensure the effect of root system of plant eupnea; At the duration of test of 3 wheat harvesting periods, plant grows fine, and has no the harmful microorganism such as bacterium, algae and grow in vase, and plant root also has no corruption, and experiment in cultivation effect is better.
(4) seed germination experiment effect
Seed germination experiment is selected nitrogen vanadium to be total to modifying titanium dioxide antimicrobial form macromolecule resin soilless culture substrate material and is tested.
Test method: antimicrobial form matrix is placed in to a large amount of running water, after making it fully absorb water and reach capacity, host material after saturated water suction is sub-packed in vial, charge weight is apart from bottleneck 1-3cm, again testing planting seed in vial, according to the germination condition of different seeds, certain thickness saturated absorbent substrate material in covering; According to the light requirement of seed sprouting, different test seeds is carried out to illumination or shading treatment; Observe and record germination and time.Table 3 is selected test seed and germination record sheet thereof.Part seed germination experiment photo is as shown in Figure 10-17.
Table 3 is tested seed and germination record sheet thereof
(5) support effect of host material of the present invention
Supporting role of the present invention as shown in figure 18, the about 160cm of bearing height, heavily about 4kg plant is kept upright to fall.
Claims (9)
1. antimicrobial form macromolecule resin soilless culture substrate material, is characterized in that this host material is the compound prepared solid shape wettable particle of macromolecule resin and photocatalysis antibacterial material, and wherein, the weight ratio of acrylic acid and photocatalysis antibacterial active material is m
acrylic acid: m
photocatalysis antibacterial active material=100:(2 ~ 10).
2. host material according to claim 1, is characterized in that described host material has more than 93% bactericidal action to Escherichia coli under natural daylight.
3. host material according to claim 1 and 2, is characterized in that this host material is more than 600% to the water absorption rate of running water.
4. prepare the method for the soilless culture substrate material as described in claim 1 or 2 or 3 for one kind, each component and the weight percent content thereof of this host material are: 100 parts of acrylic monomers, acrylamide monomer is acrylic acid 30 ~ 40%, metering system sulfonic acid monomer is acrylic acid 5 ~ 15%, crosslinking agent is acrylic acid 0.01 ~ 0.12%, initator is acrylic acid 0.1 ~ 1.4%, and dispersant is 0.1 ~ 1.0% of acrylic acid weight;
Described crosslinking agent is N, any one in N '-methylene-bisacrylamide, N hydroxymethyl acrylamide;
Described initator is any one in potassium peroxydisulfate, sodium peroxydisulfate, ammonium persulfate;
Described dispersant is one or both mixing in Span-60, the Span-80 of HLB value 3 ~ 6;
The step of the method comprises:
(1) press the percentage by weight of host material, dispersant is joined in any one solvent in n-hexane, cyclohexane, heptane, be warmed up to 35 ~ 50 DEG C, and stir and make it dispersed, obtain oil phase;
(2) press the percentage by weight of host material, acrylic monomers solution and metering system sulfonic acid monomer solution are mixed, with any one in potassium hydroxide, ammoniacal liquor, sodium hydroxide be 6 ~ 8 for alkali lye regulates pH value, add successively acrylamide solution, crosslinking agent, initator, fully mixing and stirring, obtains water;
(3) water is joined in oil phase, add by weight percentage colloidal sol or the powder aqueous solution of 2 ~ 10% photocatalysis antibacterial active material of acrylic acid weight, fully mix, be warming up to 60 ~ 80 DEG C of initiated polymerizations, filter, washing, 80 ~ 120 DEG C are dry, pulverize and make macromolecule resin soilless culture substrate material.
5. method according to claim 4, is characterized in that the described catalysis material of step (3) is: (1) conductor photocatalysis material: TiO
2or ZnO or CdS or Fe
2o
3or ZnS or SiO
2or WO
3among any one;
(2) ion modification photocatalysis material of titanium dioxide: nitrogen modifying titanium dioxide or vanadium modifying titanium dioxide or nitrogen vanadium are total to any one in modifying titanium dioxide;
The one of above-mentioned photocatalysis antibacterial active material preferred ion modifying titanium dioxide, the colloidal sol of photocatalysis antibacterial active material or powder concentration of aqueous solution are 5% of acrylic acid weight.
6. according to the method described in claim 4 or 5, it is characterized in that preferred described metering system sulfonic acid monomer consumption is 10% of acrylic acid weight.
7. according to the method described in claim 4 or 5, it is characterized in that preferred described dosage of crosslinking agent is 0.06% of acrylic acid weight.
8. according to the method described in claim 4 or 5, it is characterized in that preferred described initiator amount is 0.7% of acrylic acid weight.
9. according to the method described in claim 4 or 5, it is characterized in that preferred described dispersant dosage is 0.5% of acrylic acid weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410330414.0A CN104094828A (en) | 2014-07-11 | 2014-07-11 | Antibacterial high polymer resin soilless culture substrate material and preparation method thereof |
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Cited By (3)
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| CN105175646A (en) * | 2015-07-17 | 2015-12-23 | 四川大学 | Method for preparing agricultural water retaining agent having nitrogen and potassium fertilizer slow release function from leather making waste leather scraps |
| CN105766463A (en) * | 2016-05-23 | 2016-07-20 | 广德经济开发区绿源生态家庭农场 | Stock growing soil and preparation method thereof |
| CN106044983A (en) * | 2016-07-12 | 2016-10-26 | 佛山杰致信息科技有限公司 | Antibacterial deodorant for sewage |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105175646A (en) * | 2015-07-17 | 2015-12-23 | 四川大学 | Method for preparing agricultural water retaining agent having nitrogen and potassium fertilizer slow release function from leather making waste leather scraps |
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| CN106044983A (en) * | 2016-07-12 | 2016-10-26 | 佛山杰致信息科技有限公司 | Antibacterial deodorant for sewage |
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