CN110052175A - A kind of preparation method of silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane - Google Patents
A kind of preparation method of silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane Download PDFInfo
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- CN110052175A CN110052175A CN201910269764.3A CN201910269764A CN110052175A CN 110052175 A CN110052175 A CN 110052175A CN 201910269764 A CN201910269764 A CN 201910269764A CN 110052175 A CN110052175 A CN 110052175A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/024—Oxides
- B01D71/027—Silicium oxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/08—Polysaccharides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0052—Preparation of gels
- B01J13/0065—Preparation of gels containing an organic phase
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/48—Antimicrobial properties
Abstract
Calcium alginate hydrogel filter membrane has good antifouling property, but its flux is lower as a kind of self-supported membrane of homogeneous, and film-strength is small, and easily by bacterial degradation.The present invention provides a kind of preparation methods of silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane.Silicon dioxide hollow microsphere is handled with 3-aminopropyltriethoxysilane first, its surface is set to introduce amino, then amino-containing silicon dioxide hollow microsphere is dipped into silver nitrate solution and combines silver ion, finally the amino modified silicon dioxide hollow microsphere of silver ion will be combined to be dispersed in the aqueous solution of sodium alginate, obtains silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane by calcium ion crosslinking.Carboxyl on the amino and alginate on hollow microsphere surface generates the intensity that interaction improves calcium alginate hydrogel, and the hole wall of hollow microsphere allows water to pass through to substantially increase membrane flux.The present invention has broad prospect of application in protein purification, dye desalination field.
Description
Technical field
The present invention relates to a kind of preparation methods of silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane, belong to function
Material and UF membrane field.
The present invention relates to the technical fields such as hydrogel, filter membrane, hollow microsphere, antibacterial.More particularly to a kind of silica
The preparation method of hollow microsphere Ag-carried antibacterial hydrogel filter membrane.
Background technique
Conventional film filtering material easily causes macromolecular, colloid, electrolyte and particle etc. to exist due to the hydrophobicity of itself
Film surface or film inside irreversible deposition, fouling membrane resulting from cause membrane flux constantly to decline, so that membrane separating process cannot
It is normally carried out.An effective ways for mitigating fouling membrane are the surface naturies for improving film, such as chargedization or hydrophobicity of film surface
The hydrophiling etc. of film.Blending and modifying is a kind of simplicity side of improvement film properties learnt from other's strong points to offset one's weaknesses on the basis of existing membrane material
Method.By being blended with hydrophilic macromolecule, hydrophilic component is introduced into casting film liquid system, so that film properties be made to be improved.Altogether
The film being blended not only can maintain original rejection constant, but also pure water flux, resistance tocrocking and fungus resistance can be substantially
It is promoted.Surface coating modified is by being covered with one layer of water soluble polymer or surface-active containing functional group in film surface painting
Agent.Surface graft modification is the method that another major class can effectively improve polymer film surface property.But blending and modifying technique is multiple
Miscellaneous, surface coating is easy to fall off, and surface graft modification is difficult to obtain uniform Modified Membrane, it is often more important that these methods cannot be from
It fundamentally solves the problems, such as the hydrophily of film, also cannot fundamentally solve the pollution of film.[J Membr Sci, 2002,19
(5): 103-114]
The multicomponent system that high-molecular gel is made of polymer three-dimensional network and solvent, hydrogel because its contain 80% with
On water and have good hydrophily.Sodium alginate is a kind of natural high molecular substance that can be extracted from kelp or brown alga,
It is not only from a wealth of sources but also cheap.Sodium alginate and calcium ion can form hydrogel by ionomer.In our prior
Research in be prepared for a series of calcium alginate based aquagel filter membrane [patent of invention ZL201310424398.7,
ZL201310424399.1, ZL201310424397.2], these calcium alginate base filter membrane anti-dye pollution capacities are very strong, but
Have the shortcomings that poor mechanical property, flux are low.
Polymer is first dissolved in organic solvent when filtering film preparation by conventional polymer, and phase then occurs in water phase coagulating bath
Transformation film forming, it is compacted zone that surface, which is commonly formed, and the membrane structure of a large amount of finger-like pores is contained in inside.It strongly to be avoided in preparation process
Bubble is introduced in casting solution, because the bubble being distributed in film surface compacted zone will lead to film leakage.And alginic acid calcium-based hydraulic
Glue filter membrane does not have the finger-like pore and compacted zone of conventional polymer filter membrane, is a kind of homogeneous membrane.
Calcium alginate hydrogel filter membrane have good antifouling property, but as a kind of self-supported membrane of homogeneous its
Flux is lower, and film-strength is small, and easily by bacterial degradation.The present invention provides a kind of silicon dioxide hollow microsphere Ag-carried antibacterial water-settings
The preparation method of glue filter membrane.Silicon dioxide hollow microsphere is handled with 3-aminopropyltriethoxysilane first, makes its surface
Amino is introduced, then amino-containing silicon dioxide hollow microsphere is dipped into silver nitrate solution and combines silver ion, it finally will knot
The amino modified silicon dioxide hollow microsphere for closing silver ion is dispersed in the aqueous solution of sodium alginate, is obtained by calcium ion crosslinking
Silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane.Carboxyl on the amino and alginate on hollow microsphere surface generates
Interaction improves the intensity of calcium alginate hydrogel, and the hole wall of hollow microsphere allows water to pass through to substantially increase film
Flux.The present invention has broad prospect of application in protein purification, dye desalination field.
Summary of the invention
In view of the deficiencies of the prior art, the technical issues of present invention intends to solve be conventional polymer film antifouling property it is poor,
Calcium alginate hydrogel filters the problems such as low membrane flux, intensity difference, calcium alginate hydrogel are intolerant to bacterium.
The present invention solution conventional polymer film antifouling property is poor, calcium alginate hydrogel filtering membrane flux is low, strong
The technical solution for spending the problems such as poor, calcium alginate hydrogel is intolerant to bacterium is to provide a kind of silicon dioxide hollow microsphere Ag-carried antibacterial
The preparation method of hydrogel filter membrane.
The present invention provides a kind of preparation method of silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane, features
Be the following steps are included:
A) the 3-aminopropyltriethoxysilane aqueous solution for preparing mass percent concentration 0.01%-5%, will be through making a living
The silicon dioxide hollow microsphere for changing processing is immersed in 0.5-24h in silane-water solution, obtains in the amino-containing silica in surface
Empty microballoon；
B) step a) the amino-containing silicon dioxide hollow microsphere in surface prepared is immersed in mass percent concentration is
0.1-24h in the silver nitrate aqueous solution of 0.1%-5% is obtained using the amino combination silver ion on silicon dioxide hollow microsphere surface
To the silicon dioxide hollow microsphere of load silver ion；
C) sodium alginate of deionized water quality percentage 0.3%-5% is weighed, dissolution obtains sodium alginate under stiring
Aqueous solution, it is by way of stirring plus ultrasonic disperse that the silicon dioxide hollow microsphere of the obtained load silver ion of step b) is uniform
It is dispersed in sodium alginate aqueous solution, as casting solution；
D) the solubility calcium saline solution that calcium ion mass percent is 0.5%-10% is prepared, as ion crosslinking agent；
E) the obtained casting solution of step c) is poured on the glass plate of dry cleansing, is 100-1000 with both ends coiling diameter
The glass bar of μm copper wire strikes off, and glass plate and the film scraped are put into the solubility calcium saline solution that step d) is obtained immediately after
Middle immersion 10-240min obtains silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane；Silicon dioxide hollow microsphere surface
The silver ion of load makes hydrogel filter membrane have good anti-microbial property, and bacteriostasis rate reaches 80%-100%；In silica
Carboxyl interaction on the amino and alginate of empty microsphere surface improves the intensity of hydrogel；Silicon dioxide hollow microsphere
Hole wall allow water pass through, can make hydrogel filter membrane flux improve 10%-100%.
Soluble calcium salt of the present invention is calcium chloride, in calcium dihydrogen phosphate, calcium nitrate, calcium gluconate aqueous solution
Any one or two or more mixtures.Silicon dioxide hollow microsphere diameter of the present invention is 18-22 microns, and wall thickness is
0.8-1.2 microns, the aqueous solution of the hole wall air permeable of silicon dioxide hollow microsphere, water and inorganic salts.
Preparation method of the present invention is simple, at low cost, and organic solvent-free waste liquid generates, rejection of the film to figure dyestuff
Height, and 5% is lower than to inorganic salt rejection rate, have broad application prospects in protein, dye desalination purification art.
Specific embodiment
Specific embodiments of the present invention are described below, but the present invention should not be limited by the examples.
Embodiment 1.
A) prepare mass percent concentration 0.01% 3-aminopropyltriethoxysilane aqueous solution, will be through overactivation at
The silicon dioxide hollow microsphere of reason is immersed in 0.5h in silane-water solution, obtains the amino-containing silicon dioxide hollow microsphere in surface；
B) step a) the amino-containing silicon dioxide hollow microsphere in surface prepared is immersed in mass percent concentration is
In 0.1% silver nitrate aqueous solution for 24 hours, using the amino combination silver ion on silicon dioxide hollow microsphere surface, load silver is obtained
The silicon dioxide hollow microsphere of ion；
C) sodium alginate of deionized water quality percentage 0.3% is weighed, it is water-soluble to obtain sodium alginate for dissolution under stiring
Liquid, it is by way of stirring plus ultrasonic disperse that the silicon dioxide hollow microsphere of the obtained load silver ion of step b) is evenly dispersed
In sodium alginate aqueous solution, as casting solution；
D) calcium chloride water that calcium ion mass percent is 10% is prepared, as ion crosslinking agent；
E) the obtained casting solution of step c) is poured on the glass plate of dry cleansing, is 100 μm of copper with both ends coiling diameter
The glass bar of silk strikes off, and glass plate and the film scraped are put into the calcium chloride water that step d) is obtained and are impregnated immediately after
10min obtains silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane；Silicon dioxide hollow microsphere area load silver from
Son makes hydrogel filter membrane have good anti-microbial property, and bacteriostasis rate reaches 80；The amino on silicon dioxide hollow microsphere surface with
Carboxyl on alginate generates the intensity that interaction improves hydrogel；The hole wall of silicon dioxide hollow microsphere allows water logical
It crosses, the flux of hydrogel filter membrane can be made to improve 10%.
Embodiment 2.
A) the 3-aminopropyltriethoxysilane aqueous solution of mass percent concentration 5% is prepared, it will be by being activated
Silicon dioxide hollow microsphere be immersed in 0.5h in silane-water solution, obtain the amino-containing silicon dioxide hollow microsphere in surface；
B) step a) the amino-containing silicon dioxide hollow microsphere in surface prepared is immersed in mass percent concentration is 5%
Silver nitrate aqueous solution in 0.1h using the amino combination silver ion on silicon dioxide hollow microsphere surface obtain load silver ion
Silicon dioxide hollow microsphere；
C) sodium alginate of deionized water quality percentage 5% is weighed, dissolution obtains sodium alginate aqueous solution under stiring,
The silicon dioxide hollow microsphere of the obtained load silver ion of step b) is dispersed in by way of stirring plus ultrasonic disperse
In sodium alginate aqueous solution, as casting solution；
D) calcium dihydrogen phosphate aqueous solution that calcium ion mass percent is 10% is prepared, as ion crosslinking agent；
E) the obtained casting solution of step c) is poured on the glass plate of dry cleansing, is 1000 μm of copper with both ends coiling diameter
The glass bar of silk strikes off, and glass plate and the film scraped are put into the calcium dihydrogen phosphate aqueous solution that step d) is obtained and are soaked immediately after
240min is steeped, silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane is obtained；Silicon dioxide hollow microsphere area load
Silver ion makes hydrogel filter membrane have good anti-microbial property, and bacteriostasis rate reaches 100%；Silicon dioxide hollow microsphere surface
Carboxyl on amino and alginate generates the intensity that interaction improves hydrogel；The hole wall of silicon dioxide hollow microsphere is permitted
Xu Shui passes through, and the flux of hydrogel filter membrane can be made to improve 100%.
Embodiment 3.
A) the 3-aminopropyltriethoxysilane aqueous solution of mass percent concentration 1% is prepared, it will be by being activated
Silicon dioxide hollow microsphere be immersed in 8h in silane-water solution, obtain the amino-containing silicon dioxide hollow microsphere in surface；
B) step a) the amino-containing silicon dioxide hollow microsphere in surface prepared is immersed in mass percent concentration is 1%
Silver nitrate aqueous solution in 8h using the amino combination silver ion on silicon dioxide hollow microsphere surface obtain load silver ion
Silicon dioxide hollow microsphere；
C) sodium alginate of deionized water quality percentage 3% is weighed, dissolution obtains sodium alginate aqueous solution under stiring,
The silicon dioxide hollow microsphere of the obtained load silver ion of step b) is dispersed in by way of stirring plus ultrasonic disperse
In sodium alginate aqueous solution, as casting solution；
D) calcium nitrate aqueous solution that calcium ion mass percent is 5% is prepared, as ion crosslinking agent；
E) the obtained casting solution of step c) is poured on the glass plate of dry cleansing, is 600 μm of copper with both ends coiling diameter
The glass bar of silk strikes off, and glass plate and the film scraped are put into the calcium nitrate aqueous solution that step d) is obtained and are impregnated immediately after
60min obtains silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane；Silicon dioxide hollow microsphere area load silver from
Son makes hydrogel filter membrane have good anti-microbial property, and bacteriostasis rate reaches 90%；The amino on silicon dioxide hollow microsphere surface
The intensity that interaction improves hydrogel is generated with the carboxyl on alginate；The hole wall of silicon dioxide hollow microsphere allows water
Pass through, the flux of hydrogel filter membrane can be made to improve 50%.
Embodiment 4.
A) the 3-aminopropyltriethoxysilane aqueous solution of mass percent concentration 2% is prepared, it will be by being activated
Silicon dioxide hollow microsphere be immersed in 2h in silane-water solution, obtain the amino-containing silicon dioxide hollow microsphere in surface；
B) step a) the amino-containing silicon dioxide hollow microsphere in surface prepared is immersed in mass percent concentration is 2%
Silver nitrate aqueous solution in 2h using the amino combination silver ion on silicon dioxide hollow microsphere surface obtain load silver ion
Silicon dioxide hollow microsphere；
C) sodium alginate of deionized water quality percentage 2% is weighed, dissolution obtains sodium alginate aqueous solution under stiring,
The silicon dioxide hollow microsphere of the obtained load silver ion of step b) is dispersed in by way of stirring plus ultrasonic disperse
In sodium alginate aqueous solution, as casting solution；
D) the calcium gluconate aqueous solution that calcium ion mass percent is 2% is prepared, as ion crosslinking agent；
E) the obtained casting solution of step c) is poured on the glass plate of dry cleansing, is 200 μm of copper with both ends coiling diameter
The glass bar of silk strikes off, and glass plate and the film scraped are put into the calcium gluconate aqueous solution that step d) is obtained and are soaked immediately after
120min is steeped, silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane is obtained；Silicon dioxide hollow microsphere area load
Silver ion makes hydrogel filter membrane have good anti-microbial property, and bacteriostasis rate reaches 99%；Silicon dioxide hollow microsphere surface
Carboxyl on amino and alginate generates the intensity that interaction improves hydrogel；The hole wall of silicon dioxide hollow microsphere is permitted
Xu Shui passes through, and the flux of hydrogel filter membrane can be made to improve 25%.
Claims (4)
1. a kind of preparation method of silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane, it is characterized in that including following step
It is rapid:
A) prepare mass percent concentration 0.01%-5% 3-aminopropyltriethoxysilane aqueous solution, will be through overactivation at
The silicon dioxide hollow microsphere of reason is immersed in 0.5-24h in silane-water solution, and it is micro- to obtain the amino-containing hollow silica in surface
Ball；
B) step a) the amino-containing silicon dioxide hollow microsphere in surface prepared is immersed in mass percent concentration is 0.1%-
0.1-24h in 5% silver nitrate aqueous solution is loaded using the amino combination silver ion on silicon dioxide hollow microsphere surface
The silicon dioxide hollow microsphere of silver ion；
C) sodium alginate of deionized water quality percentage 0.3%-5% is weighed, it is water-soluble to obtain sodium alginate for dissolution under stiring
Liquid, it is by way of stirring plus ultrasonic disperse that the silicon dioxide hollow microsphere of the obtained load silver ion of step b) is evenly dispersed
In sodium alginate aqueous solution, as casting solution；
D) the solubility calcium saline solution that calcium ion mass percent is 0.5%-10% is prepared, as ion crosslinking agent；
E) the obtained casting solution of step c) is poured on the glass plate of dry cleansing, is 100-1000 μm of copper with both ends coiling diameter
The glass bar of silk strikes off, and glass plate and the film scraped are put into the solubility calcium saline solution that step d) is obtained and are soaked immediately after
10-240min is steeped, silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane is obtained；Silicon dioxide hollow microsphere area load
Silver ion make hydrogel filter membrane that there is good anti-microbial property, bacteriostasis rate reaches 80%-100%；Hollow silica is micro-
Carboxyl interaction on the amino and alginate of ball surface improves the intensity of hydrogel；The hole of silicon dioxide hollow microsphere
Wall allows water to pass through, and the flux of hydrogel filter membrane can be made to improve 10%-100%.
2. a kind of preparation method of silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane as described in claim 1, special
Sign is that the silicon dioxide hollow microsphere diameter is 18-22 microns, and wall thickness is 0.8-1.2 microns, and hollow silica is micro-
The aqueous solution of the hole wall air permeable of ball, water and inorganic salts.
3. a kind of preparation method of silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane as described in claim 1, special
Sign be the soluble calcium salt be calcium chloride, calcium dihydrogen phosphate, calcium nitrate, in calcium gluconate aqueous solution any one or
Two or more mixtures.
4. a kind of preparation method of silicon dioxide hollow microsphere Ag-carried antibacterial hydrogel filter membrane as described in claim 1, special
Sign is that preparation method is simple, at low cost, and organic solvent-free waste liquid generates, and the film is high to the rejection of figure dyestuff, and to inorganic
Salt rejection rate is lower than 5%, has broad application prospects in protein, dye desalination purification art.
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| CN110862126A (en) * | 2019-11-26 | 2020-03-06 | 天津工业大学 | Preparation method of hydrogel electrocatalytic electrode containing silver phosphate/calcium phosphate |
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