CN114130208A - Preparation method of high-solid-content and high-strength copper alginate antibacterial filtering membrane - Google Patents
Preparation method of high-solid-content and high-strength copper alginate antibacterial filtering membrane Download PDFInfo
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- CN114130208A CN114130208A CN202111398579.8A CN202111398579A CN114130208A CN 114130208 A CN114130208 A CN 114130208A CN 202111398579 A CN202111398579 A CN 202111398579A CN 114130208 A CN114130208 A CN 114130208A
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- copper
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- 239000012528 membrane Substances 0.000 title claims abstract description 46
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 35
- 239000010949 copper Substances 0.000 title claims abstract description 35
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229940072056 alginate Drugs 0.000 title claims abstract description 34
- 235000010443 alginic acid Nutrition 0.000 title claims abstract description 34
- 229920000615 alginic acid Polymers 0.000 title claims abstract description 34
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 25
- 238000001914 filtration Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000000017 hydrogel Substances 0.000 claims abstract description 50
- 239000000243 solution Substances 0.000 claims abstract description 39
- 238000005266 casting Methods 0.000 claims abstract description 30
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 29
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 29
- 239000000661 sodium alginate Substances 0.000 claims abstract description 29
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 29
- 239000007787 solid Substances 0.000 claims abstract description 26
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 claims abstract description 22
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910001431 copper ion Inorganic materials 0.000 claims abstract description 15
- 230000001112 coagulating effect Effects 0.000 claims abstract description 14
- 238000002791 soaking Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007864 aqueous solution Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000005345 coagulation Methods 0.000 claims abstract description 8
- 230000015271 coagulation Effects 0.000 claims abstract description 8
- 239000010865 sewage Substances 0.000 claims abstract description 7
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 6
- 230000003115 biocidal effect Effects 0.000 claims abstract description 4
- 238000010612 desalination reaction Methods 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 24
- 238000004132 cross linking Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 229910052621 halloysite Inorganic materials 0.000 claims description 3
- 239000002048 multi walled nanotube Substances 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000007790 scraping Methods 0.000 abstract description 5
- 230000001580 bacterial effect Effects 0.000 abstract description 3
- 239000004005 microsphere Substances 0.000 description 5
- 235000010410 calcium alginate Nutrition 0.000 description 4
- 239000000648 calcium alginate Substances 0.000 description 4
- 229960002681 calcium alginate Drugs 0.000 description 4
- OKHHGHGGPDJQHR-YMOPUZKJSA-L calcium;(2s,3s,4s,5s,6r)-6-[(2r,3s,4r,5s,6r)-2-carboxy-6-[(2r,3s,4r,5s,6r)-2-carboxylato-4,5,6-trihydroxyoxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate Chemical class [Ca+2].O[C@@H]1[C@H](O)[C@H](O)O[C@@H](C([O-])=O)[C@H]1O[C@H]1[C@@H](O)[C@@H](O)[C@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@H](O2)C([O-])=O)O)[C@H](C(O)=O)O1 OKHHGHGGPDJQHR-YMOPUZKJSA-L 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- QKSIFUGZHOUETI-UHFFFAOYSA-N copper;azane Chemical compound N.N.N.N.[Cu+2] QKSIFUGZHOUETI-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- 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
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0011—Casting solutions therefor
-
- 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
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0013—Casting processes
-
- 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
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0016—Coagulation
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/30—Cross-linking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/24—Mechanical properties, e.g. strength
-
- 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
Aiming at the problems of poor strength, low solid content and bacterial intolerance of alginate hydrogel, the invention reports a preparation method of a high-solid-content high-strength copper alginate antibacterial filtering membrane. Firstly, preparing a mixture water solution of a reinforcing agent and sodium alginate as a membrane casting solution. Copper acetate was also dissolved in ethanol as a coagulation bath. And scraping the membrane casting solution into a membrane, and soaking the membrane casting solution into a coagulating bath, wherein copper acetate dissolved in ethanol is also dissolved in an aqueous solution, so that copper ions are diffused into a sodium alginate solution to be crosslinked, and thus the copper alginate hydrogel is obtained. Meanwhile, water in the hydrogel is diffused into ethanol, and sodium alginate is not dissolved in the ethanol, so that the copper alginate hydrogel film with high solid content is obtained. Due to its high solid content, the strength of the membrane is greatly increased. The preparation method is simple, and the obtained high-solid-content high-strength copper alginate antibacterial filtering membrane has wide application prospects in the fields of sewage treatment, dye desalination, antibiotic removal and the like.
Description
Technical Field
The invention relates to a preparation method of a high-solid-content and high-strength copper alginate antibacterial filtering membrane, belonging to the field of functional materials and membrane separation.
The invention relates to the technical fields of waste copper ammonia solution, filtering membranes, hydrogel and the like. In particular to a preparation method of a high-solid-content and high-strength copper alginate antibacterial filtering membrane.
Background
The traditional sewage treatment method generally has complex equipment operation and high energy consumption, can generate secondary pollution, and the membrane separation technology as an environment-friendly new technology can well solve the problems and is one of the most promising water treatment technologies at present. The traditional filtering membrane is usually made of inorganic materials, organic high molecular materials or inorganic-organic composite materials, and the structure of the traditional filtering membrane is divided into a plurality of types; different materials and structures determine the direction of application and the degree of separation of the membranes and thus the application will vary. The polymer hydrogel membrane has the advantages of small size, low energy consumption, simple preparation, low price and the like, is the first choice material for sewage treatment at present, but has certain disadvantages such as organic solvent intolerance, membrane pollution easily caused, bacteria easily bred and the like. In addition, the demand for simple and effective techniques for sewage treatment has been increasing in recent years. The method is of great significance to the development of novel anti-pollution membranes.
Sodium alginate is a natural polysaccharide that has attracted much attention because of its strong hydrophilic ability. In the previous researches, a series of calcium alginate-based hydrogel filtering membranes are prepared [ patent No. ZL201310424398.7, ZL201310424399.1, ZL201310424397.2 ], but the calcium alginate-based hydrogel filtering membranes have the problems of low mechanical strength, easiness in swelling, easiness in bacterial growth, low permeation flux and the like, so that the construction of a hydrogel membrane with high strength, swelling resistance, good antibacterial performance and high flux is particularly important.
In most cases, the maximum limit of concentration of sodium alginate solution required to obtain uniform microspheres is limited due to the high viscosity of the aqueous sodium alginate solution. The concentration of sodium alginate in the aqueous solution determines the density of the sodium alginate hydrogel network in the microspheres, and is one of the key factors for controlling the mechanical properties of the sodium alginate hydrogel. The higher the density of alginate in the hydrogel, the higher the mechanical density of the hydrogel. Kim J et al propose a simple strategy, i.e. remodeling of the polymer network and subsequent cross-linking process, to prepare uniform alginate microspheres with alginate densities up to 38 wt% by reducing the particle size of the alginate to 34% of the original particle size. While maintaining the spherical shape, the uniform ion-crosslinked sodium alginate microspheres are shrunk by solvent exchange with an organic solvent. The shrinkage state of the sodium alginate microspheres is fixed by secondary crosslinking of sodium alginate. The sodium alginate hydrogel prepared by this process shows enhanced, controllable mechanical properties [ Macromolecular Chemistry & Physics, 2015, 216 (8): 914-921].
Copper ions and sodium alginate have strong affinity, good antibacterial activity and high environmental safety, and compared with the general silver-based antibacterial auxiliary agent, the copper-based antibacterial auxiliary agent gradually attracts scientific research workers due to excellent antibacterial performance and low cost, and has good application prospect in the fields of biomedicine and the like.
Aiming at the problems of poor strength, low solid content and bacterial intolerance of alginate hydrogel, the invention reports a preparation method of a high-solid-content high-strength copper alginate antibacterial filtering membrane. Firstly, preparing a mixture water solution of a reinforcing agent and sodium alginate as a membrane casting solution. Copper acetate was also dissolved in ethanol as a coagulation bath. And scraping the membrane casting solution into a membrane, and soaking the membrane casting solution into a coagulating bath, wherein copper acetate dissolved in ethanol is also dissolved in an aqueous solution, so that copper ions are diffused into a sodium alginate solution to be crosslinked, and thus the copper alginate hydrogel is obtained. Meanwhile, water in the hydrogel is diffused into ethanol, and sodium alginate is not dissolved in the ethanol, so that the copper alginate hydrogel film with high solid content is obtained. Due to its high solid content, the strength of the membrane is greatly increased. The preparation method is simple, and the obtained high-solid-content high-strength copper alginate antibacterial filtering membrane has wide application prospects in the fields of sewage treatment, dye desalination, antibiotic removal and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to solve the technical problems of non-antibacterial property, poor strength, low solid content and the like of the calcium alginate hydrogel.
The invention provides a preparation method of a high-solid-content and high-strength copper alginate antibacterial filtering membrane, which solves the problems of non-antibacterial property, poor strength, low solid content and the like of the waste calcium alginate hydrogel.
The invention provides a preparation method of a high-solid-content high-strength copper alginate antibacterial filtering membrane, which is characterized by comprising the following steps of:
a) preparing a mixture water solution with the mass percentage concentration of 0.05-5% of sodium alginate and the mass percentage concentration of 0.01-5% of reinforcing agent as a casting solution, and defoaming for later use;
b) dissolving copper acetate in ethanol to serve as a coagulating bath;
c) pouring the casting solution obtained in the step a) after standing and defoaming on a clean glass plate, strickling the glass plate by using a glass rod with copper wires with the diameter of 10-1000 microns wound at two ends, immediately soaking the glass plate and the strickled film in the coagulating bath obtained in the step b), dissolving copper acetate dissolved in ethanol into an aqueous solution, so that copper ions are diffused into the casting solution for crosslinking to obtain a copper alginate hydrogel film, and simultaneously diffusing water in the casting solution and the hydrogel into ethanol, but not dissolving sodium alginate in the ethanol, so that the copper alginate hydrogel film with high solid content is obtained; the solid content of the film is improved, so that the strength of the hydrogel film is improved by 2.2-3.6 times; the copper ions enable the hydrogel filtering membrane to have good antibacterial performance;
d) controlling the solid content of the film by controlling the concentration of copper acetate in the coagulation bath, the thickness of the film and the soaking time in the step c), thereby controlling the strength of the film.
The reinforcing agent is any one or a mixture of two or more of titanium dioxide, carboxylated multi-walled carbon nanotubes, graphene oxide and halloysite.
The membrane obtained by the invention has wide application prospect in the fields of sewage treatment, dye desalination, dye interception, antibiotic removal and the like.
Detailed Description
Specific examples of the present invention will be described below, but the present invention is not limited to the examples.
Example 1.
a) Preparing a mixture water solution with the mass percent concentration of sodium alginate of 0.05 percent and the mass percent concentration of titanium dioxide of 0.01 percent as a membrane casting solution, and defoaming for later use;
b) dissolving copper acetate in ethanol to serve as a coagulating bath;
c) pouring the casting solution obtained in the step a) after standing and defoaming on a clean glass plate, scraping the glass plate by using a glass rod with copper wires with the diameter of 10 microns wound at two ends, immediately soaking the glass plate and the scraped film in the coagulating bath obtained in the step b), and dissolving copper acetate dissolved in ethanol into an aqueous solution, so that copper ions are diffused into the casting solution for crosslinking to obtain a copper alginate hydrogel film, and meanwhile, the casting solution and the water in the hydrogel are diffused into the ethanol, and the sodium alginate is not dissolved in the ethanol, so that the copper alginate hydrogel film with high solid content is obtained; the solid content of the film is improved, so that the strength of the hydrogel film is improved by 3.3 times; the copper ions enable the hydrogel filtering membrane to have good antibacterial performance;
d) controlling the solid content of the film by controlling the concentration of copper acetate in the coagulation bath, the thickness of the film and the soaking time in the step c), thereby controlling the strength of the film.
Example 2.
a) Preparing a mixture aqueous solution with the mass percentage concentration of 5% of sodium alginate and the mass percentage concentration of 5% of carboxylated multi-walled carbon nanotubes as a membrane casting solution, and defoaming for later use;
b) dissolving copper acetate in ethanol to serve as a coagulating bath;
c) pouring the casting solution obtained in the step a) after standing and defoaming on a clean glass plate, scraping the glass plate by using a glass rod with two ends wound with copper wires with the diameter of 1000 microns, immediately soaking the glass plate and the scraped film in the coagulating bath obtained in the step b), and dissolving copper acetate dissolved in ethanol into an aqueous solution, so that copper ions are diffused into the casting solution for crosslinking to obtain a copper alginate hydrogel film, and meanwhile, the casting solution and the water in the hydrogel are diffused into the ethanol, and the sodium alginate is not dissolved in the ethanol, so that the copper alginate hydrogel film with high solid content is obtained; the solid content of the film is improved, so that the strength of the hydrogel film is improved by 3.6 times; the copper ions enable the hydrogel filtering membrane to have good antibacterial performance;
d) controlling the solid content of the film by controlling the concentration of copper acetate in the coagulation bath, the thickness of the film and the soaking time in the step c), thereby controlling the strength of the film.
Example 3.
a) Preparing a mixture aqueous solution with the mass percentage concentration of sodium alginate of 2% and the mass percentage concentration of graphene oxide of 2% as a membrane casting solution, and defoaming for later use;
b) dissolving copper acetate in ethanol to serve as a coagulating bath;
c) pouring the casting solution obtained in the step a) after standing and defoaming on a clean glass plate, scraping the glass plate by using a glass rod with two ends wound with copper wires with the diameter of 200 mu m, immediately soaking the glass plate and the scraped film in the coagulating bath obtained in the step b), and dissolving copper acetate dissolved in ethanol into an aqueous solution, so that copper ions are diffused into the casting solution for crosslinking to obtain a copper alginate hydrogel film, and simultaneously, the casting solution and the water in the hydrogel are diffused into the ethanol, and the sodium alginate is not dissolved in the ethanol, so that the copper alginate hydrogel film with high solid content is obtained; the solid content of the film is improved, so that the strength of the hydrogel film is improved by 2.2 times; the copper ions enable the hydrogel filtering membrane to have good antibacterial performance;
d) controlling the solid content of the film by controlling the concentration of copper acetate in the coagulation bath, the thickness of the film and the soaking time in the step c), thereby controlling the strength of the film.
Example 4.
a) Preparing a mixture aqueous solution with the mass percentage concentration of 3% of sodium alginate and the mass percentage concentration of 3% of halloysite as a membrane casting solution, and defoaming for later use;
b) dissolving copper acetate in ethanol to serve as a coagulating bath;
c) pouring the casting solution obtained in the step a) after standing and defoaming on a clean glass plate, strickling the glass plate by using a glass rod with two ends wound with copper wires with the diameter of 400 mu m, immediately soaking the glass plate and the strickled film in the coagulating bath obtained in the step b), dissolving copper acetate dissolved in ethanol into an aqueous solution, so that copper ions are diffused into the casting solution for crosslinking to obtain a copper alginate hydrogel film, and meanwhile, diffusing the casting solution and water in the hydrogel into ethanol, but not dissolving sodium alginate in the ethanol, so that the copper alginate hydrogel film with high solid content is obtained; the solid content of the film is improved, so that the strength of the hydrogel film is improved by 3.2 times; the copper ions enable the hydrogel filtering membrane to have good antibacterial performance;
d) controlling the solid content of the film by controlling the concentration of copper acetate in the coagulation bath, the thickness of the film and the soaking time in the step c), thereby controlling the strength of the film.
Claims (3)
1. A preparation method of a high-solid-content high-strength copper alginate antibacterial filtering membrane is characterized by comprising the following steps:
a) preparing a mixture water solution with the mass percentage concentration of 0.05-5% of sodium alginate and the mass percentage concentration of 0.01-5% of reinforcing agent as a casting solution, and defoaming for later use;
b) dissolving copper acetate in ethanol to serve as a coagulating bath;
c) pouring the casting solution obtained in the step a) after standing and defoaming on a clean glass plate, strickling the glass plate by using a glass rod with copper wires with the diameter of 10-1000 microns wound at two ends, immediately soaking the glass plate and the strickled film in the coagulating bath obtained in the step b), dissolving copper acetate dissolved in ethanol into an aqueous solution, so that copper ions are diffused into the casting solution for crosslinking to obtain a copper alginate hydrogel film, and simultaneously diffusing water in the casting solution and the hydrogel into ethanol, but not dissolving sodium alginate in the ethanol, so that the copper alginate hydrogel film with high solid content is obtained; the solid content of the film is improved, so that the strength of the hydrogel film is improved by 2.2-3.6 times; the copper ions enable the hydrogel filtering membrane to have good antibacterial performance;
d) controlling the solid content of the film by controlling the concentration of copper acetate in the coagulation bath, the thickness of the film and the soaking time in the step c), thereby controlling the strength of the film.
2. The method for preparing the high-solid-content high-strength copper alginate antibacterial filtering membrane as claimed in claim 1, wherein the reinforcing agent is any one or a mixture of two or more of titanium dioxide, carboxylated multi-walled carbon nanotubes, graphene oxide and halloysite.
3. Use of the membrane obtained by the method according to claim 1 for sewage treatment, dye desalination, dye retention, antibiotic removal.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140113821A1 (en) * | 2011-06-03 | 2014-04-24 | Frank GU | Polysaccharide-based hydrogel polymer and uses thereof |
| CN108704495A (en) * | 2018-05-21 | 2018-10-26 | 天津工业大学 | A kind of preparation method of carboxylation titanium dioxide/calcium alginate compounded hydrogel filter membrane |
| CN110773008A (en) * | 2019-11-29 | 2020-02-11 | 天津工业大学 | Preparation method of copper phosphate-containing alginate hydrogel antibacterial filtering membrane |
| CN111705419A (en) * | 2020-06-28 | 2020-09-25 | 南京工业大学 | Metal-loaded carbon nitride-doped graphene-based flexible non-woven fabric and preparation method and application thereof |
| CN113262330A (en) * | 2021-07-06 | 2021-08-17 | 上海大学 | Sodium alginate/collagen composite bone scaffold and preparation method and application thereof |
-
2021
- 2021-11-24 CN CN202111398579.8A patent/CN114130208B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140113821A1 (en) * | 2011-06-03 | 2014-04-24 | Frank GU | Polysaccharide-based hydrogel polymer and uses thereof |
| CN108704495A (en) * | 2018-05-21 | 2018-10-26 | 天津工业大学 | A kind of preparation method of carboxylation titanium dioxide/calcium alginate compounded hydrogel filter membrane |
| CN110773008A (en) * | 2019-11-29 | 2020-02-11 | 天津工业大学 | Preparation method of copper phosphate-containing alginate hydrogel antibacterial filtering membrane |
| CN111705419A (en) * | 2020-06-28 | 2020-09-25 | 南京工业大学 | Metal-loaded carbon nitride-doped graphene-based flexible non-woven fabric and preparation method and application thereof |
| CN113262330A (en) * | 2021-07-06 | 2021-08-17 | 上海大学 | Sodium alginate/collagen composite bone scaffold and preparation method and application thereof |
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