CN103392698A - Attapulgite material with anti-bacterial function and preparation method thereof - Google Patents
Attapulgite material with anti-bacterial function and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an attapulgite material with an anti-bacterial function and a preparation method thereof. The preparation method of the attapulgite material comprises the following main steps of: packaging certain materials containing amine groups onto the surface of the attapulgite by virtue of a functional water agent preparation process, a pelletizing process, a drying process and the like; enabling the attapulgite to have the special performances of the modified material while not damaging the structure of the attapulgite. The modified material can be used for absorbing bacteria with negative charges, so that negative charges on bacterial cell walls and cell membranes are not uniformly distributed, the synthesis of the cell walls is interfered, the cell wall synthesis and solubility equilibrium under the natural condition is broken through, and the bacteria are dissolved and died, and therefore, the anti-bacterial and bacteriostatic performances are achieved.
Description
Technical field
The present invention relates to the antibiotic functional material technical field, specifically a kind of have antibacterial functions attapulgite material and preparation method thereof.
Background technology
Attapulgite refers to a kind of clay mineral take attapulgite (attapulgite) as key component.Attapulgite is a kind of crystalloid hydrous magnesium aluminium silicate mineral, has unique layer chain structure feature.The range of application of attapulgite covers all many-sides such as oil, chemical industry, building materials, papermaking, medicine, agricultural at present.Particularly the exclusive design feature of attapulgite is given it and is had certain absorption property, makes it in waste water treatment, air cleaning, and the field such as medical is widely used.Its suction-operated mainly comprises physical adsorption and chemisorbed.The essence of physical adsorption is by Van der Waals force, adsorption molecule to be adsorbed on to the surfaces externally and internally of attapulgite.The existence of the inner zeolite channels of crystal structure has given attapulgite huge inner ratio surface area, simultaneously because single crystal presents tiny bar-shaped, needle-like and fibrous and higher surface charge, rod-like fibre does not keep original orientation when disperseing, and presents the random precipitation of felted thing.After drying, their intensive uneven secondary pores of size that together forms.This feature makes the specific surface area of attapulgite very large.Crystals zeolite cavity size is consistent in addition, makes it have the effect of molecular sieve.The chemisorption of attapulgite is its adsorbing important embodiment, and its absorption mainly contains: the absorption that (1) charge unbalance causes is mainly by the ion of different valence state and the Mg in crystal
2+, Al
3+, Fe
3+Exchange, cause charge unbalance, and the adsorption effect brought of attapulgite's surface CHARGE DISTRIBUTION imbalance; (2) in Si-O-Si, the fracture of oxygen silicon key can form covalent bond with the material that is adsorbed, and produces stronger adsorption capacity.Because attapulgite has powerful suction-operated, and surface contains higher positive charge, therefore in the screening of antibiotic host material, occupies great advantage.
During reality is used, with attapulgite, as host material, often need attapulgite is carried out to modification, then improve the absorption property of attapulgite or adhesive property etc., comparatively common in the application aspect waste water treatment, air cleaning and construction material to improve it, but using attapulgite as base starting material, the report that is applied in the antibiotic functional material aspect is also less.Application number 03131757.X has reported attapulgite-argentum nanometer composite antibiotic and preparation method thereof, but heavy metals and Material cladding complex procedures, cost is higher, and improper use also can cause heavy metal pollution.
Summary of the invention
Goal of the invention of the present invention is to overcome above-mentioned the deficiencies in the prior art, provides that a kind of consumption of raw materials is few, environmental protection, technique is simple, production cost is low, the antibiotic functional material take attapulgite as host material and method thereof.
The present invention solves the problems of the technologies described above with following technical scheme:
At first invention provides a kind of antibacterial functions attapulgite material that has, and described antibacterial functions attapulgite material is prepared by function aqua and attapulgite, and described function aqua is the aqueous solution that contains the material of amido.
Preferably, the described material that contains amido is AH, 2-imidazolidinone, 1B, urea, shitosan, one or more in ammonium chloride.
Preferably, the mass concentration of described function aqua is 10%～30%.The consumption mass ratio of described function aqua and attapulgite powder is 1:5～1:20.
Invention provides the attapulgite modified method for preparing antibiotic functional material simultaneously, and its operating procedure is as follows:
S1. take the material that contains amido soluble in water, the even function equipment aqua of stirring and dissolving;
S2. on the attapulgite spheroid, spray the described function aqua of S1, then add the attapulgite powder, then spray the function aqua, make semi-finished product;
S3. oven dry, adopt uniform temperature to dry to moisture and be less than 2% of gross mass mark, obtains final finished.
Wherein, the diameter of the described attapulgite spheroid of S2 is the spheroid of 2mm-3mm.After spray function aqua, can repeat the one or many following steps: add the attapulgite powder, then spray the function aqua; Until become the spheroid of 3mm-5mm, become semi-finished product.
The described material that contains amido specifically comprises AH, 2-imidazolidinone, 1B, urea, shitosan, ammonium chloride etc.;
The concentration of described function aqua is 10%～30%.
In described pelletization, the consumption mass ratio of the consumption of modified feedstock and attapulgite powder is 1:5～1:20.
Bake out temperature in described drying course is 50 ℃～80 ℃.
Preferably, can adopt following scheme implementation:
S1. function aqua configuration: take a certain amount of modified feedstock, be dissolved in certain water gaging, stirring and dissolving is even.Be mixed with and contain certain density function aqua;
S2. granulate: the recessed native bead of prefabricated kernel 2mm-3mm is packed in granulator;------equipment that starts stirs, and---balling-up 3mm-5mm stops adding the function aqua, and------adding a certain amount of concave convex rod---continues the round as a ball semi-finished product that obtain to continue round as a ball 30-60min to repeat to spray a small amount of function aqua and add a small amount of attapulgite---add gradually function water dosage and add the attapulgite powder amount---to add a small amount of attapulgite powder to spray the function aqua in a small amount of S1.The whole production process time was at 2-3 hour;
S3. oven dry, adopt uniform temperature to dry to moisture and be less than 2% of gross mass mark, obtains final finished.
The bonding mechanism of described amine compound and attapulgite belongs to physical bond, it is specifically using attapulgite as carrier, amine compound is loaded to attapulgite's surface, so both can bring into play the adsorption capacity of attapulgite to bacterium, improve again the contact area of amine compound and bacterium.
Compared with prior art, beneficial effect of the present invention is embodied in:
(1) attapulgite is natural monodimension nanometer material, has larger specific surface area, is ideal carrier material.The present invention is by the antibiotic functional material of attapulgite modified preparation, except the suction-operated of attapulgite itself has certain antibacterial functions, also has the external particular functional group's who introduces antibacterial action.Simultaneously, due in the modified product of attapulgite, the large aperture that itself has by the antibiotic carrier of attapulgite, greatly increased the contact surface area of antimicrobial factors, make antibacterial agent can slowly discharge in antibacterial product, thereby play, continue antibiotic effect, make the antimicrbial power of antibacterial agent significantly strengthen.And this material has good stability and persistence.
(2) attapulgite modified material of the present invention is a kind of desirable anti-biotic material with better antibacterial effect, and application is extensive, as can be applicable to the fields such as household electrical appliance, cleaners and polishes, bonded fabric product, medical dressing, construction material.
(3) the present invention adopts the method for mechanical mixture that the raw material that some have the specific function group is incorporated in attapulgite, so neither can destroy the prototype structure of attapulgite, guarantee lasting, the efficient antibacterial functions of attapulgite, simultaneously in preparation process, can not produce other accessory substances, can not produce secondary pollution to environment, consumption of raw materials is few, environmental protection, technique is simple, production cost is low, has very large industrial applications prospect.
Embodiment
Below the inventive method is described in further detail:
S1. function aqua configuration: take a certain amount of modified feedstock AH, the 2-imidazolidinone, 1B, urea, a kind of being dissolved in certain water gaging in shitosan or ammonium chloride, stirring and dissolving is even.Be configured to concentration and be 10%～30% function aqua;
S2. granulate: the recessed native bead of prefabricated kernel 2mm-3mm is packed in granulator;------equipment that starts stirs---repeats to spray a small amount of function aqua and adds a small amount of attapulgite that------balling-up 3mm-5mm stops adding the function aqua, and------adding a certain amount of attapulgite powder---continues the round as a ball semi-finished product that obtain to continue round as a ball 30-60min with adding the attapulgite powder amount to add gradually function water dosage to add a small amount of attapulgite powder to spray the function aqua in a small amount of S1.The whole production process time, the mass ratio of modified feedstock and attapulgite powder was 1:5～1:20 at 2-3 hour;
S3. oven dry, adopt 50～80 ℃ to dry to moisture and be less than 2% of gross mass mark, obtains final finished.
modified feedstock of the present invention is mainly some materials that contain amido, described AH, the 2-imidazolidinone, 1B, urea, shitosan, a large amount of amidos is contained on the ammonium chloride surface, amido is combined with hydrogen ion, generate the amino of positively charged, absorption is with the bacterium of negative electrical charge, make the negative electrical charge skewness on bacteria cell wall and cell membrane, synthesizing of interference cell wall, Cell wall synthesis and dissolution equilibrium under nature have been broken, make cell wall trend towards dissolving, cell membrane is not because bearing the osmotic pressure deformation fracture, the Dissolve things inside of cell such as water, protein etc. ooze out, bacterolysis occurs and death, thereby play certain antibacterial and bacteriostasis.
The present invention will be further described below in conjunction with specific embodiment, but therefore do not limit the invention in described example ranges.The test method of using in following embodiment if no special instructions, is conventional method; The raw material that uses, reagent etc., if no special instructions, being can be from raw material and the reagent that commercial sources obtains such as routine is commercial.
Embodiment 1:
?S1. granulate; the recessed native bead of prefabricated kernel 3mm is packed in granulator;------equipment that starts stirs 20min---repeat to spray the blank aqua of 10kg and add 6kg attapulgite continuation stirring 20min---, and strengthening the aqua consumption is 24kg to add 6 kg attapulgite powders to spray the blank aqua of 10kg; add attapulgite powder amount 10kg---balling-up 3mm, stop adding water that------adding the 10kg attapulgite---continues the round as a ball semi-finished product that obtain to continue round as a ball 30min.The whole production process time is 2.5 hours;
S2. oven dry, adopts 80 ℃ to dry and to be less than 2% of gross mass mark to moisture in 24 hours, obtains final finished.
This finished product is respectively 10% and 15% to the antibiotic rate of Escherichia coli and Candida albicans.
Embodiment 2:
With agar, spread paper disk method, respectively the antibacterial effect of AH, 2-imidazolidinone, 1B, urea, ammonium chloride and shitosan is measured.
The results show, AH, 2-imidazolidinone, 1B, urea, ammonium chloride and shitosan above raw material under the same dose condition is respectively the antibacterial effect of Escherichia coli and Candida albicans: 55% and 60%, 48% and 52%, 58% and 60%, 40% and 46%, 49% and 53%, 68% and 75%.
Embodiment 3:
S1. function aqua preparation, take AH 4kg, is dissolved in 40kg water, and stirring and dissolving is even.Be mixed with mass concentration and be 10% function aqua;
S2. granulate; the recessed native bead of prefabricated kernel 3mm is packed in granulator;------equipment that starts stirs 20min---repeat to spray 10kg function aqua and add 6kg attapulgite continuation stirring 20min---, and strengthen function aqua consumption is 24kg to function aqua in spray 10kg S1 to add 6 kg attapulgite powders; add attapulgite powder amount 10kg---balling-up 3mm, stop adding the function aqua that------adding the 10kg attapulgite---continues the round as a ball semi-finished product that obtain to continue round as a ball 30min.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:8;
S3. oven dry, adopts 80 ℃ to dry and to be less than 2% of gross mass mark to moisture in 24 hours, obtains final finished.
This finished product reaches respectively 85% and 90% to the antibiotic rate of Escherichia coli and Candida albicans.With the anti-microbial property of pure attapulgite particle in embodiment 1, compare, antibiotic rate to Escherichia coli and Candida albicans has improved respectively 60% and 58%, therefore can prove that the attapulgite modified antibiotic property of AH is significantly improved than the antibiotic property of unmodified attapulgite.
Embodiment 4:
S1. function aqua preparation, take 2-imidazolidinone 8kg, is dissolved in 40kg water, and stirring and dissolving is even.Be mixed with mass concentration and be 20% function aqua;
S2. granulate; the recessed native bead of prefabricated kernel 3mm is packed in granulator;------equipment that starts stirs 20min---repeat to spray 10kg function aqua and add 20 kg attapulgites continuation stirring 20min---, and strengthen function aqua consumption is 28 kg to function aqua in spray 10kg S1 to add 20 kg attapulgite powders; add attapulgite powder amount 20kg---balling-up 5mm, stop adding the function aqua that------adding 20kg attapulgite powder---continues the round as a ball semi-finished product that obtain to continue round as a ball 30min.The whole production process time is 3 hours;
S3. oven dry, adopts 50 ℃ to dry and to be less than 2% of gross mass mark to moisture in 24 hours, obtains final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:10.
This finished product reaches respectively 80% and 85% to the antibiotic rate of Escherichia coli and Candida albicans.With the anti-microbial property of pure attapulgite particle in embodiment 1, compare, antibiotic rate to Escherichia coli and Candida albicans has improved respectively 55% and 53%, therefore can prove that the attapulgite modified antibiotic property of 2-imidazolidinone is significantly improved than the antibiotic property of unmodified attapulgite.
Embodiment 5:
S1. function aqua preparation, take 1B 4kg, is dissolved in 40kg water, and stirring and dissolving is even.Be mixed with mass concentration and be 10% function aqua;
S2. granulate; the recessed native bead of prefabricated kernel 2mm is packed in granulator;------equipment that starts stirs 20min---repeat to spray 10kg function aqua and add 6 kg attapulgites continuation stirring 20min---, and strengthen function aqua consumption is 24kg to function aqua in spray 10kg S1 to add 6kg attapulgite powder; add attapulgite powder amount 10kg---balling-up 3.5mm, stop adding the function aqua that------adding 10kg attapulgite powder---continues the round as a ball semi-finished product that obtain to continue round as a ball 30min.The whole production process time is 2 hours;
S3. oven dry, adopts 70 ℃ to dry and to be less than 2% of gross mass mark to moisture in 24 hours, obtains final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:8.
This finished product reaches respectively 87% and 85% to the antibiotic rate of Escherichia coli and Candida albicans.With the anti-microbial property of pure attapulgite particle in embodiment 1, compare, antibiotic rate to Escherichia coli and Candida albicans has improved respectively 62% and 53%, therefore can prove that the attapulgite modified antibiotic property of 1B is significantly improved than the antibiotic property of unmodified attapulgite.
Embodiment 6:
S1. function aqua preparation, take urea 12kg, is dissolved in 40kg water, and stirring and dissolving is even.Be mixed with mass concentration and be 30% function aqua;
S2. granulate; the recessed native bead of prefabricated kernel 2mm-3mm is packed in granulator;------equipment that starts stirs 20min---repeats to spray 10kg function aqua to function aqua in spray 10kg S1 to add 10 kg attapulgite powders; add 15 kg attapulgites and continue to stir 20min---strengthening function aqua consumption is 32 kg; add attapulgite powder amount 15kg---balling-up 4mm, stop adding the function aqua that------adding 20kg attapulgite powder---continues the round as a ball semi-finished product that obtain to continue round as a ball 30min.The whole production process time is 2 hours;
S3. oven dry, adopts 50 ℃ to dry and to be less than 2% of gross mass mark to moisture in 24 hours, obtains final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:5.
This finished product reaches respectively 75% and 82% to the antibiotic rate of Escherichia coli and Candida albicans.With the anti-microbial property of pure attapulgite particle in embodiment 1, compare, antibiotic rate to Escherichia coli and Candida albicans has improved respectively 50% and 50%, therefore can prove that the antibiotic property of urea-modified attapulgite is significantly improved than the antibiotic property of unmodified attapulgite.
Embodiment 7:
S1. function aqua preparation, take ammonium chloride 4kg, is dissolved in 40kg water, and stirring and dissolving is even.Be mixed with mass concentration and be 10% function aqua;
S2. granulate; the recessed native bead of prefabricated kernel 2mm-3mm is packed in granulator;------equipment that starts stirs 20min---repeats to spray 10kg function aqua to function aqua in spray 10kg S1 to add 20 kg attapulgite powders; add 20 kg attapulgites and continue to stir 20min---strengthening function aqua consumption is 24kg; add attapulgite powder amount 20kg---balling-up 5mm, stop adding the function aqua that------adding 20kg attapulgite powder---continues the round as a ball semi-finished product that obtain to continue round as a ball 30min.The whole production process time is 2 hours;
S3. oven dry, adopts 60 ℃ to dry and to be less than 2% of gross mass mark to moisture in 24 hours, obtains final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:20.
This finished product reaches respectively 70% and 78% to the antibiotic rate of Escherichia coli and Candida albicans.With the anti-microbial property of pure attapulgite particle in embodiment 1, compare, antibiotic rate to Escherichia coli and Candida albicans has improved respectively 45% and 46%, therefore can prove that the attapulgite modified antibiotic property of ammonium chloride is significantly improved than the antibiotic property of unmodified attapulgite.
Embodiment 8:
S1. function aqua preparation, take shitosan 4kg, with the acetic acid aqueous solution of 40kg 5%, mixes, and stirring and dissolving is even.Be mixed with mass concentration and be 10% function aqua;
S2. granulate; the recessed native bead of prefabricated kernel 2mm-3mm is packed in granulator;------equipment that starts stirs 20min---repeats to spray 10kg function aqua to function aqua in spray 10kg S1 to add 20 kg attapulgite powders; add 20 kg attapulgites and continue to stir 20min---strengthening function aqua consumption is 24kg; add attapulgite powder amount 20kg---balling-up 5mm, stop adding the function aqua that------adding 20kg attapulgite powder---continues the round as a ball semi-finished product that obtain to continue round as a ball 30min.The whole production process time is 2 hours;
S3. oven dry, adopts 60 ℃ to dry and to be less than 2% of gross mass mark to moisture in 24 hours, obtains final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:20.
This finished product reaches respectively 90% and 95% to the antibiotic rate of Escherichia coli and Candida albicans.With the anti-microbial property of pure attapulgite particle in embodiment 1, compare, antibiotic rate to Escherichia coli and Candida albicans has improved respectively 65% and 63%, therefore can prove that the antibiotic property of chitin modified attapulgite is significantly improved than the antibiotic property of unmodified attapulgite.
The antibacterial effect of above-described embodiment is summarized in table 1, as shown in the table.
Table 1 the anti-bacterial result conclusive table
As can be seen from Table 1, the anti-microbial property of the attapulgite material after modification is compared with former modified feedstock all and is obviously strengthened, and illustrates that attapulgite has significantly improved the antibacterial efficacy of all kinds of implication amine compound raw materials.
Embodiment 9
The stability test of the prepared anti-biotic material of the present invention
Method of testing:
By in above embodiment 3-embodiment 8 prepared attapulgite modified respectively 45 ℃ with-20 ℃ of conditions under placed 3 months, and then survey its antibiotic property to Escherichia coli and Candida albicans, the anti-bacterial result is as shown in table 2:
Attapulgite modified the anti-bacterial result conclusive table under table 2 polarity condition
As can be seen from Table 2, after the stability test under polarity condition, attapulgite modified antibacterial effect is all less than larger variation, and after therefore can proving, with above antibiotic raw material, attapulgite being carried out to modification, it is material modified still has certain stability after long-time storage.
Claims (10)
1. one kind has antibacterial functions attapulgite material, it is characterized in that, described antibacterial functions attapulgite material is prepared by function aqua and attapulgite, and described function aqua is the aqueous solution that contains the material of amido.
2. a kind of according to claim 1 have an antibacterial functions attapulgite material, it is characterized in that, the described material that contains amido is AH, 2-imidazolidinone, 1B, urea, shitosan, one or more in ammonium chloride.
3. a kind of according to claim 2 have an antibacterial functions attapulgite material, it is characterized in that, the mass concentration of described function aqua is 10%～30%.
4. a kind of according to claim 1 have an antibacterial functions attapulgite material, it is characterized in that, the consumption mass ratio of described function aqua and attapulgite powder is 1:5～1:20.
5. the preparation method with antibacterial functions attapulgite material, is characterized in that, comprises following operating procedure:
S1. take the material that contains amido soluble in water, the even function equipment aqua of stirring and dissolving;
S2. the described function aqua of spray S1 on the attapulgite spheroid, make semi-finished product;
S3. semi-finished product are dried to moisture and are less than 2% of gross mass mark 50 ℃～80 ℃ temperature, make finished product.
6. have according to claim 5 the preparation method of antibacterial functions attapulgite material, it is characterized in that, the described material that contains amido is AH, 2-imidazolidinone, 1B, urea, shitosan, one or more in ammonium chloride.
7. have according to claim 6 the preparation method of antibacterial functions attapulgite material, it is characterized in that, the mass concentration of described function aqua is 10%～30%.
8. have according to claim 6 the preparation method of antibacterial functions attapulgite material, it is characterized in that, the consumption mass ratio of described function aqua and attapulgite powder is 1:5～1:20.
9. the preparation method with antibacterial functions attapulgite material as claimed in claim 5, is characterized in that, the diameter of the described attapulgite spheroid of S2 is the spheroid of 2mm-3mm.
10. the preparation method with antibacterial functions attapulgite material as claimed in claim 5, is characterized in that, after spray function aqua, repeats the one or many following steps: add the attapulgite powder, then spray the function aqua; Until become the spheroid of 3mm-5mm, become semi-finished product.
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| CN106943988A (en) * | 2017-04-12 | 2017-07-14 | 明光市国星凹土有限公司 | A kind of preparation method of attapulgite adsorption particle |
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| CN109498645A (en) * | 2018-11-28 | 2019-03-22 | 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心 | Charge regulation cooperates with the high-pressure homogeneous method for preparing attapulgite cationic antibacterial agent |
| CN112715575A (en) * | 2021-03-03 | 2021-04-30 | 中国科学院兰州化学物理研究所 | Attapulgite-fulvic acid hybrid antibacterial material and preparation method thereof |
| CN114342940A (en) * | 2022-01-25 | 2022-04-15 | 江苏经贸职业技术学院 | Preparation method of novel nano composite antibacterial material |
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