CN103392698B - One has antibacterial functions attapulgite material and preparation method thereof - Google Patents
One has antibacterial functions attapulgite material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses one and there is antibacterial functions attapulgite material and preparation method thereof, the key step of the method is the preparation respectively by function aqua, the raw material packet that some are contained amido by the processes such as granulation and oven dry is rolled in attapulgite's surface, while not destroying this body structure of attapulgite, attapulgite is made again to be provided with the characteristic property of modified feedstock.This material modified bacterium can adsorbed with negative electrical charge, make the negative electrical charge skewness on bacteria cell wall and cell membrane, the synthesis of interference cell wall, break Cell wall synthesis in its natural state and dissolution equilibrium, make bacterolysis dead, thus play the performance of antibacterial bacteriostatic.
Description
Technical field
The present invention relates to antibiotic functional material technical field, specifically one has antibacterial functions attapulgite material and preparation method thereof.
Background technology
A kind of clay mineral that it is key component that attapulgite refers to attapulgite (attapulgite).Attapulgite is a kind of crystalloid hydrous magnesium aluminium silicate mineral, has unique layer chain structure feature.The range of application of current attapulgite covers all many-sides such as oil, chemical industry, building materials, papermaking, medicine, agricultural.The fields such as the design feature that particularly attapulgite is exclusive is given it and had certain absorption property, makes it in waste water treatment, air cleaning, medical are widely used.Its suction-operated mainly comprises physical adsorption and chemisorbed.The essence of physical adsorption is the surfaces externally and internally by Van der Waals force, adsorption molecule being adsorbed on attapulgite.The existence of crystal structure internal zeolite passage imparts the huge inner ratio surface area of attapulgite, simultaneously because single crystal presents tiny bar-shaped, needle-like and threadiness and higher surface charge, when disperseing, rod-like fibre does not keep original orientation, presents the random precipitation of felted thing.After drying, their intensive secondary pores together forming size inequality.This feature makes the specific surface area of attapulgite very large.In addition crystals zeolite cavity size is consistent, 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 Mg in the ion of different valence state and crystal
2+, Al
3+, Fe
3+exchange, cause charge unbalance, and the adsorption effect that attapulgite's surface distribution of charges imbalance is brought; (2) in Si-O-Si, the fracture of oxygen silicon key can form covalent bond with by the material adsorbed, and produces stronger adsorption capacity.Because attapulgite has powerful suction-operated, and surface is containing higher positive charge, therefore in the screening of antibacterial host material, occupies great advantage.
During reality uses, often need to carry out modification to attapulgite as host material with attapulgite, then the absorption property or adhesive property etc. of attapulgite is improved, comparatively common to improve its application in waste water treatment, air cleaning and construction material, but using attapulgite as base starting material, the report being applied in 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, take attapulgite as antibiotic functional material and the method thereof of host material.
The present invention solves the problems of the technologies described above with following technical scheme:
Invention provide firstly one and has antibacterial functions attapulgite material, and described antibacterial functions attapulgite material is prepared by function aqua and attapulgite, and described function aqua is the aqueous solution of the material containing amido.
Preferably, the described material containing 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 preparing antibiotic functional material simultaneously, and its operating procedure is as follows:
S1. the material taken containing amido is soluble in water, the even function equipment aqua of stirring and dissolving;
S2. on attapulgite spheroid, spray the function aqua described in S1, then add attapulgite powder, then spray function aqua, obtained semi-finished product;
S3. dry, adopt uniform temperature to dry and be less than 2% of gross mass mark to moisture, obtain final finished.
Wherein, the diameter of the attapulgite spheroid described in S2 is the spheroid of 2mm-3mm.After spray function aqua, one or many following steps can be repeated: add attapulgite powder, then spray function aqua; Until become the spheroid of 3mm-5mm, become semi-finished product.
The described material containing 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 of modified feedstock and the consumption mass ratio of attapulgite powder are 1:5 ~ 1:20.
Bake out temperature in described drying course is 50 DEG C ~ 80 DEG C.
Preferably, following scheme implementation can be adopted:
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 containing certain density function aqua;
S2. granulate: the recessed native bead of prefabricated kernel 2mm-3mm is loaded in granulator;------equipment that starts stirs, and---repeat to spray a small amount of function aqua and add a small amount of attapulgite---add gradually function water dosage and add attapulgite powder amount---balling-up 3mm-5mm, stopping adds function aqua, and------adding a certain amount of concave convex rod---continues round as a ballly to obtain semi-finished product to continue round as a ball 30-60min 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. dry, adopt uniform temperature to dry and be less than 2% of gross mass mark to moisture, obtain final finished.
The bonding mechanism of described amine compound and attapulgite belongs to physical bond, its specifically using attapulgite as carrier, amine compound is loaded to attapulgite's surface, so both can play the adsorption capacity of attapulgite to bacterium, turn improve 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, and the suction-operated except attapulgite itself has except certain antibacterial functions, also has the antibacterial action of the external particular functional group introduced.Simultaneously, due in the modified product of attapulgite, by the large aperture that attapulgite antibacterial carrier has itself, greatly add the contact surface area of antimicrobial factors, make antibacterial agent can slow releasing in antibacterial product, thus play the effect of sustained anti-microbial, the antimicrbial power of antibacterial agent is significantly strengthened.Further, 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) raw material that the present invention adopts the method for mechanical mixture some to be had specific function group is incorporated in attapulgite, so both can not destroy the prototype structure of attapulgite, ensure lasting, the efficient antibacterial functions of attapulgite, simultaneously in preparation process, other accessory substances can not be produced, secondary pollution can not be produced 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, 2-imidazolidinone, 1B, urea, the one in shitosan or ammonium chloride is dissolved in certain water gaging, and stirring and dissolving is even.Be configured to the function aqua that concentration is 10% ~ 30%;
S2. granulate: the recessed native bead of prefabricated kernel 2mm-3mm is loaded in granulator;------equipment that starts stirs, and---repeat to spray a small amount of function aqua and add a small amount of attapulgite---add gradually function water dosage and add attapulgite powder amount---balling-up 3mm-5mm, stopping adds function aqua, and------adding a certain amount of attapulgite powder---continues round as a ballly to obtain semi-finished product to continue round as a ball 30-60min 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. dry, adopt 50 ~ 80 DEG C of oven dry to be less than 2% of gross mass mark to moisture, obtain final finished.
Modified feedstock of the present invention is mainly some materials containing amido, described AH, 2-imidazolidinone, 1B, urea, shitosan, ammonium chloride surface is containing a large amount of amidos, amido is combined with hydrogen ion, generate the amino of positively charged, adsorb the bacterium with negative electrical charge, make the negative electrical charge skewness on bacteria cell wall and cell membrane, the synthesis of interference cell wall, break Cell wall synthesis in its natural state and dissolution equilibrium, cell wall is made to trend towards dissolving, cell membrane deformation fracture because osmotic pressure can not be born, the Dissolve things inside of cell is as water, protein etc. ooze out, there is bacterolysis and dead, thus play certain antibacterial and bacteriostasis.
Below in conjunction with specific embodiment, the present invention will be further described, but therefore do not limit the invention in described example ranges.The test method used in following embodiment if no special instructions, is conventional method; The raw material used, reagent etc., if no special instructions, being can from raw material that commercial sources obtains and the reagent such as routine is commercial.
embodiment 1:
s1. granulate; the recessed native bead of prefabricated kernel 3mm is loaded in granulator;------equipment that starts stirs 20min---repeat the blank aqua of spray 10kg and add 6kg attapulgite continuation stirring 20min---, and strengthening aqua consumption is 24kg to add 6 kg attapulgite powders to spray 10kg blank aqua;---balling-up 3mm, stops adding water---continues round as a ball 30min---adding 10kg attapulgite---continues round as a ballly to obtain semi-finished product to add attapulgite powder amount 10kg.The whole production process time is 2.5 hours;
S2. dry, adopt 80 DEG C to dry 24 and be littlely less than 2% of gross mass mark up to moisture, obtain final finished.
The antibiotic rate of this finished product to Escherichia coli and Candida albicans is respectively 10% and 15%.
embodiment 2:
Use AGP test 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 the shitosan antibacterial effect of above raw material to Escherichia coli and Candida albicans under same dose condition is respectively: 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, be dissolved in 40kg water, stirring and dissolving is even.Be mixed with the function aqua that mass concentration is 10%;
S2. granulate; the recessed native bead of prefabricated kernel 3mm is loaded in granulator;------equipment that starts stirs 20min---repeat 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;---balling-up 3mm, stop add function aqua---continues round as a ball 30min---adding 10kg attapulgite---continues round as a ballly to obtain semi-finished product to add attapulgite powder amount 10kg.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:8;
S3. dry, adopt 80 DEG C to dry 24 and be littlely less than 2% of gross mass mark up to moisture, obtain final finished.
The antibiotic rate of this finished product to Escherichia coli and Candida albicans reaches 85% and 90% respectively.Compared with the anti-microbial property of attapulgite particle pure in embodiment 1,60% and 58% are improve respectively to the antibiotic rate of Escherichia coli and Candida albicans, 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, be dissolved in 40kg water, stirring and dissolving is even.Be mixed with the function aqua that mass concentration is 20%;
S2. granulate; the recessed native bead of prefabricated kernel 3mm is loaded in granulator;------equipment that starts stirs 20min---repeat 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;---balling-up 5mm, stop add function aqua---continues round as a ball 30min---adding 20kg attapulgite powder---continues round as a ballly to obtain semi-finished product to add attapulgite powder amount 20kg.The whole production process time is 3 hours;
S3. dry, adopt 50 DEG C to dry 24 and be littlely less than 2% of gross mass mark up to moisture, obtain final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:10.
The antibiotic rate of this finished product to Escherichia coli and Candida albicans reaches 80% and 85% respectively.Compared with the anti-microbial property of attapulgite particle pure in embodiment 1,55% and 53% are improve respectively to the antibiotic rate of Escherichia coli and Candida albicans, 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, be dissolved in 40kg water, stirring and dissolving is even.Be mixed with the function aqua that mass concentration is 10%;
S2. granulate; the recessed native bead of prefabricated kernel 2mm is loaded in granulator;------equipment that starts stirs 20min---repeat 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;---balling-up 3.5mm, stop add function aqua---continues round as a ball 30min---adding 10kg attapulgite powder---continues round as a ballly to obtain semi-finished product to add attapulgite powder amount 10kg.The whole production process time is 2 hours;
S3. dry, adopt 70 DEG C to dry 24 and be littlely less than 2% of gross mass mark up to moisture, obtain final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:8.
The antibiotic rate of this finished product to Escherichia coli and Candida albicans reaches 87% and 85% respectively.Compared with the anti-microbial property of attapulgite particle pure in embodiment 1,62% and 53% are improve respectively to the antibiotic rate of Escherichia coli and Candida albicans, 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, be dissolved in 40kg water, stirring and dissolving is even.Be mixed with the function aqua that mass concentration is 30%;
S2. granulate; the recessed native bead of prefabricated kernel 2mm-3mm is loaded in granulator;------equipment that starts stirs 20min---repeats spray 10kg function aqua to function aqua in spray 10kg S1 to add 10 kg attapulgite powders; add 15 kg attapulgites to continue to stir 20min---strengthening function aqua consumption is 32 kg;---balling-up 4mm, stop add function aqua---continues round as a ball 30min---adding 20kg attapulgite powder---continues round as a ballly to obtain semi-finished product to add attapulgite powder amount 15kg.The whole production process time is 2 hours;
S3. dry, adopt 50 DEG C to dry 24 and be littlely less than 2% of gross mass mark up to moisture, obtain final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:5.
The antibiotic rate of this finished product to Escherichia coli and Candida albicans reaches 75% and 82% respectively.Compared with the anti-microbial property of attapulgite particle pure in embodiment 1,50% and 50% are improve respectively to the antibiotic rate of Escherichia coli and Candida albicans, 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, be dissolved in 40kg water, stirring and dissolving is even.Be mixed with the function aqua that mass concentration is 10%;
S2. granulate; the recessed native bead of prefabricated kernel 2mm-3mm is loaded in granulator;------equipment that starts stirs 20min---repeats spray 10kg function aqua to function aqua in spray 10kg S1 to add 20 kg attapulgite powders; add 20 kg attapulgites to continue to stir 20min---strengthening function aqua consumption is 24kg;---balling-up 5mm, stop add function aqua---continues round as a ball 30min---adding 20kg attapulgite powder---continues round as a ballly to obtain semi-finished product to add attapulgite powder amount 20kg.The whole production process time is 2 hours;
S3. dry, adopt 60 DEG C to dry 24 and be littlely less than 2% of gross mass mark up to moisture, obtain final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:20.
The antibiotic rate of this finished product to Escherichia coli and Candida albicans reaches 70% and 78% respectively.Compared with the anti-microbial property of attapulgite particle pure in embodiment 1,45% and 46% are improve respectively to the antibiotic rate of Escherichia coli and Candida albicans, therefore can prove that the antibiotic property of ammonium chloride attapulgite is significantly improved than the antibiotic property of unmodified attapulgite.
embodiment 8:
S1. function aqua preparation, take shitosan 4kg, mix with the acetic acid aqueous solution of 40kg 5%, stirring and dissolving is even.Be mixed with the function aqua that mass concentration is 10%;
S2. granulate; the recessed native bead of prefabricated kernel 2mm-3mm is loaded in granulator;------equipment that starts stirs 20min---repeats spray 10kg function aqua to function aqua in spray 10kg S1 to add 20 kg attapulgite powders; add 20 kg attapulgites to continue to stir 20min---strengthening function aqua consumption is 24kg;---balling-up 5mm, stop add function aqua---continues round as a ball 30min---adding 20kg attapulgite powder---continues round as a ballly to obtain semi-finished product to add attapulgite powder amount 20kg.The whole production process time is 2 hours;
S3. dry, adopt 60 DEG C to dry 24 and be littlely less than 2% of gross mass mark up to moisture, obtain final finished.The whole production process time is 2.5 hours, and the mass ratio of modified feedstock and attapulgite powder is 1:20.
The antibiotic rate of this finished product to Escherichia coli and Candida albicans reaches 90% and 95% respectively.Compared with the anti-microbial property of attapulgite particle pure in embodiment 1,65% and 63% are improve respectively to the antibiotic rate of Escherichia coli and Candida albicans, 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 modified attapulgite material all obviously strengthens compared with former modified feedstock, illustrates that attapulgite significantly improves the antibacterial efficacy of all kinds of implication amine compound raw material.
Embodiment 9
The stability test of anti-biotic material prepared by the present invention
Method of testing:
Attapulgite modifiedly to place prepared in above embodiment 3-embodiment 83 months under 45 DEG C with-20 DEG C of conditions respectively, and then survey its antibiotic property to Escherichia coli and Candida albicans, the anti-bacterial result is as shown in table 2:
The anti-bacterial result conclusive table attapulgite modified under table 2 polarity condition
As can be seen from Table 2, after the stability test under polarity condition, attapulgite modified antibacterial effect, all less than larger change, therefore can prove to carry out modified with above antibacterial raw material to attapulgite, and it is material modified still has certain stability after long-time storage.
Claims (3)
1. have an 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 of the material containing amido, and concrete preparation method comprises:
S1. the material taken containing amido is soluble in water, the even function equipment aqua of stirring and dissolving;
S2. on attapulgite spheroid, the function aqua described in S1 is sprayed, obtained semi-finished product;
S3. semi-finished product are dried 50 DEG C ~ 80 DEG C temperature and are less than 2% of gross mass mark to moisture, obtain finished product,
Wherein, the described material containing amido is AH, 2-imidazolidinone, 1B, one or more in urea, and the mass concentration of function aqua is 10% ~ 30%, and the consumption mass ratio of function aqua and attapulgite powder is 1:5 ~ 1:20.
2. have the preparation method of antibacterial functions attapulgite material as claimed in claim 1, it is characterized in that, the diameter of the attapulgite spheroid described in S2 is the spheroid of 2mm-3mm.
3. there is the preparation method of antibacterial functions attapulgite material as claimed in claim 1, it is characterized in that, after spray function aqua, repeat one or many following steps: add attapulgite powder, then spray function aqua; Until become the spheroid of 3mm-5mm, become semi-finished product.
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| CN107012716B (en) * | 2017-05-11 | 2018-06-12 | 南通美亚新型活性炭制品有限公司 | Preparation method of formaldehyde adsorption paper |
| 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 |
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