CN104258739A - Composite multilayer ultrafiltration membrane - Google Patents
Composite multilayer ultrafiltration membrane Download PDFInfo
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- CN104258739A CN104258739A CN201410478875.2A CN201410478875A CN104258739A CN 104258739 A CN104258739 A CN 104258739A CN 201410478875 A CN201410478875 A CN 201410478875A CN 104258739 A CN104258739 A CN 104258739A
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Abstract
The invention discloses a composite multilayer ultrafiltration membrane. The cross section of the composite ultrafiltration membrane is in a multilayer hollow concentric structure, wherein the multilayer structure comprises an inner surface layer, an outer surface layer and an intermediate sandwich layer, the inner surface layer and the outer surface layer are made of a porous fiber polymer, the intermediate sandwich layer is a filter material layer and clamped and wrapped by the inner surface layer and the outer surface layer. The composite multilayer ultrafiltration membrane is simple in structure. The prepared composite multilayer ultrafiltration membrane is prepared by adopting two or more ultrafiltration processes; compared with an existing water purifier combined filter core, the composite multilayer ultrafiltration membrane has the advantages that the complicated combined structure is omitted, one filter core integrates the filter purification functions of various filter cores, and the water purification performance of the composite ultrafiltration membrane adopting a membrane technology is excellent.
Description
Technical field
The present invention relates to milipore filter, particularly multi-layer composite ultrafiltration membrane.
Background technology
In the world, ultrafiltration membrane technique is widely applied, and the ultrafiltration membrane technique of China has had very large progress, membrane technology in a lot of fields in applied widely, be acknowledged as one of the most rising new and high technology in the present age.
Traditional water treatment method, can not ensure to provide colory drinking water, and in municipal water supply, also there is the problem of twice pollution, as the cistern water supply of high level, very long running water feed-line, all can cause potential iron rust, the pollution problem such as incrustation scale and microorganism, therefore, the water purifier of various brand arises at the historic moment.
Existing water purifier mostly is hyperfiltration, nanofiltration, active carbon adsorption etc. by water quality treatment, when a kind of technique is difficult to remove harmful substance in water, adopts two kinds or two or more technique to be compound; As charcoal absorption combine receive, charcoal absorption in conjunction with hyperfiltration, polypropylene superfine fiber binding activities charcoal in conjunction with hyperfiltration etc.; In composite water purifying device, membrane technology compound water purifier water purification performance is excellent, more significant effect is had especially in removal microorganism (bacterium, algae etc.), the colory water purifier discharge water of some of them can directly be drunk raw, obtain the welcome of consumers in general, become the focus of water purifier current development.
Summary of the invention
The object of the present invention is to provide a kind of multi-layer composite ultrafiltration membrane.
Another object of the present invention is to the preparation method that multi-layer composite ultrafiltration membrane is provided.
The technical scheme of multi-layer composite ultrafiltration membrane is:.
The technical solution adopted for the present invention to solve the technical problems is: a kind of multi-layer composite ultrafiltration membrane, it is characterized in that: described composite hyperfiltration membrane cross section is multilayer hollow concentric structure, its sandwich construction is respectively endosexine, extexine, therebetween central layer, described endosexine, skin materials are porous fibre polymer, described therebetween central layer is filtering material layer, clamps parcel by endosexine, extexine.
Described therebetween central layer is multiple filtration material composition, comprises Nano-particle filtration layer and active carbon particle filter course, and the filtering material in each layer is different, is separated in the middle of different material layer by fibrous polymer nitride layer.
Described porous fibre polymer is the one in polyvinylidene fluoride PVDF or polyvinylchloride.
Nano material in described nanoparticle filter course alive is one or more in zinc oxide ZnO, silica SiO2, alundum (Al2O3) Al2O3, and particle diameter is 1 ~ 100nm.
Activated carbon granule in described active carbon particle filter course is one or more in graphene oxide (GRAPHENE OXIDE), cocos active carbon, and particle diameter is 0.1-3mm.
Described Nano-particle filtration layer, its preparation method comprises the following steps:
1. mixed with nano particle by flexible fiber powder, mixed proportion is 5:5 ~ 8:2;
2. mixture of nanofibers is added hot-melt adhesive stir pulping, binding agent percentage is 5% ~ 10%, pours in mould after pulping, wait for 60 ~ 120 minutes shaping;
3. shaping nanofiber is put into baking oven to dry, drying time is 30 ~ 60 minutes, and bake out temperature is 30 ~ 90 DEG C, for taking out when to dry to its humidity be 20%;
4. by humidity be 20% nanofiber put into fuse machine and carry out adding water hot melt, hot molten time is 10 ~ 60 minutes, and hot melting temperature is 100 ~ 200 DEG C, adds water and is spaced apart 3 ~ 8 minutes, and amount of water is 20% of nanofiber total amount;
Described active carbon particle filter course, its preparation method comprises the following steps:
1. mixed with activated carbon granule by flexible fiber powder, mixed proportion is 3:7 ~ 6:4;
2. NACF mixture is added hot-melt adhesive stir pulping, pour in mould, wait for 60 ~ 120 minutes shaping;
3. shaping activated carbon fiber is put into baking oven to dry, drying time is 30 ~ 60 minutes, and bake out temperature is 30 ~ 90 DEG C, for taking out when to dry to its humidity be 20%; ;
4. by humidity be 20% activated carbon fiber put into fuse machine and carry out adding water hot melt, hot molten time is 10 ~ 60 minutes, and hot melting temperature is 100 ~ 200 DEG C, adds water and is spaced apart 3 ~ 8 minutes, and amount of water is 20% of activated carbon fiber total amount;
Described hot-melt adhesive is one or more in polyethylene binder, polypropylene adhesive, polyamide binders or polyester adhesive.
The preparation method of described multi-layer composite ultrafiltration membrane, it is characterized in that: by porous fibre polymer powder, solvent, stabilizing agent, ratio is (50:45:5) ~ (70:20:10), homogeneous heating stirs pulping, heating-up temperature is 30 ~ 80 DEG C, mixing time is 8 ~ 12 hours, after add pore former, pore former addition is 1% ~ 5% of total amount, continue stirring 15 ~ 30 hours, rear standing and defoaming forms casting solution, inclined heated plate is 24 ~ 30 hours, casting solution is through device for spinning spinned fiber film, tunica fibrosa is flat in plane mould, filter course on fiber face tiles, filter course is one or more of active carbon particle filter course or Nano-particle filtration layer, one deck tunica fibrosa is inserted again above filter course, flatten after cooling 30 ~ 60 minutes shaping, open circles is curled in the round mould of transposition, round mould is put on heater and heats, heat time is 10 ~ 30 minutes, heating-up temperature is 150 ~ 300 DEG C, make tunica fibrosa end to end PUR be connected into circle, place in cold water and soak 48 hours, after the complete stripping of solvent, namely shaping multi-layer composite ultrafiltration membrane is fixed.
Described heat stabilizer is GTWQ heat stabilizer, and pore former is polyethylene glycol PEG, and described solvent is dimethylacetylamide.
Structure of the present invention is simple, by the multi-layer composite ultrafiltration membrane that the inventive method is obtained, adopt two kinds or two or more ultrafiltration technologies, be compound milipore filter, the filter core produced by this kind of milipore filter, compared with current water purifier Combined filter element, eliminates complicated combining structure, filter core contains a filtration, purification function for multiple filter core, embodies membrane technology composite hyperfiltration membrane water purification performance Optimality, the pore size of milipore filter itself can reach 0.01 micron, only allow water, beneficial mineral matter and trace element through, become and purify waste water, and microorganism, iron rust, colloid, silt, suspension larger molecular organics retains in ultrafiltration membrane pipe, especially on removal microorganism (bacterium, virus, algae etc.) there is more significant effect aspect, wherein Nano-particle filtration layer has filtered calcium in water further, magnesium, bacterium, organic matter, inorganic matter, remaining oxygen, metal ion and radioactive substance, it is the acid-base value of the activated carbon adjustment water of shell (coconut husk) finally by material, purifying waste water of making to make is sparkling and crystal-clear limpid, mouthfeel becomes sweet pure and sweet, can directly drink raw, for culinary art, health is more better to eat, with bathing of purifying waste water, the impurity on skin can be removed, skin care, play the effect of nature beauty treatment, the small household appliances required waters such as humidifier, vapour iron, beauty instrument can be supplied to, horrible incrustation scale will never be occurred, support the use with ice machine, the ice cube made is glittering and translucent, without any peculiar smell.
Accompanying drawing explanation
Fig. 1 is sectional view of the present invention.
In Fig. 1,1 endosexine (fibre-forming polymer); 2 extexines (fibre-forming polymer); 3 therebetween central layer;
Fig. 2 is sandwich filter course sectional view in the middle of multi-layer composite ultrafiltration membrane of the present invention.
In Fig. 2,3.1 Nano-particle filtration layers; 3.2 fibrous polymer nitride layer; 3.3 active carbon particle layers;
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Embodiment one:
3.1 Nano-particle filtration layer preparation method comprise the following steps as shown in Figure 2:
1. the silica being 30nm by polyvinyl chloride powder and particle diameter mixes, and mixed proportion is 5:5;
2. add polyethylene binder at polyvinyl chloride end with silica mixture and stir pulping, polyethylene binder percentage is 5%, pours in mould after pulping, waits for and is shaped to mixture of nanofibers in 70 minutes;
3. shaping mixture of nanofibers is put into baking oven to dry, drying time is 30 minutes, and bake out temperature is 30 DEG C, for taking out when to dry to its humidity be 20%;
4. by humidity be 20% mixture of nanofibers put into fuse machine and carry out adding water hot melt, hot molten time is 60 minutes, and hot melting temperature is 100 DEG C, adds water and is spaced apart 8 minutes, and amount of water is 20% of nanofiber total amount;
3.3 active carbon particle filter courses as shown in Figure 2, its preparation method comprises the following steps:
1. the cocos active carbon being 1mm by polyvinyl chloride powder and particle diameter mixes, and mixed proportion is 3:7;
2. add polyethylene hot-melt adhesive at polyvinyl chloride powder and coconut activated carbon mix and stir pulping, pour in mould, wait for 60 minutes shaping;
3. shaping activated carbon fiber is put into baking oven to dry, drying time is 60 minutes, and bake out temperature is 70 DEG C, for taking out when to dry to its humidity be 20%;
4. by humidity be 20% activated carbon fiber put into fuse machine and carry out adding water hot melt, hot molten time is 60 minutes, and hot melting temperature is 130 DEG C, adds water and is spaced apart 5 minutes, and amount of water is 20% of activated carbon fiber total amount;
1 endosexine shown in Fig. 1,3.2 fibrous polymer nitride layer shown in 2 extexines and Fig. 2 are all fibre-forming polymers, and its preparation method comprises the following steps:
1. by poly vinylidene fluoride powder, dimethylacetylamide, GTWQ, ratio is 50:45:5, and homogeneous heating stirs pulping, and heating-up temperature is 40 DEG C, and mixing time is 12 hours;
2. add polyethylene glycol, polyethylene glycol addition is 5% of total amount, continues stirring 15 hours;
3. standing and defoaming forms casting solution, and inclined heated plate is 24 hours;
4. casting solution is through device for spinning spinned fiber polymer;
As shown in Figure 1, therebetween central layer 3, clamps parcel by endosexine 1, extexine 2, and clamping parcel step is as follows:
1. fibre-forming polymer is flat in plane mould, fibrous polymer object plane tiles nano SiO 2 particle filter course, cocos active carbon particle filtering layer, above filter course, insert one deck tunica fibrosa again, flatten after cooling 30 minutes shaping, obtain plane multi-layer composite ultrafiltration membrane;
2. open circles is curled into by the round mould of plane multi-layer composite ultrafiltration membrane transposition, round mould is put on heater and heats, heat time is 30 minutes, heating-up temperature is 150 DEG C, make tunica fibrosa end to end PUR be connected into circle, place in cold water and soak 48 hours, after the complete stripping of solvent, be namely fixed shaping hollow round multi-layer composite ultrafiltration membrane.
Embodiment two:
3.1 Nano-particle filtration layer preparation method comprise the following steps as shown in Figure 2:
1. the alundum (Al2O3) being 40nm by polyvinyl chloride powder and particle diameter mixes, and mixed proportion is 6:4;
2. add polyethylene binder at polyvinyl chloride end with alundum (Al2O3) mixture and stir pulping, polyethylene binder percentage is 10%, pours in mould after pulping, waits for and is shaped to mixture of nanofibers in 120 minutes;
3. shaping mixture of nanofibers is put into baking oven to dry, drying time is 60 minutes, and bake out temperature is 40 DEG C, for taking out when to dry to its humidity be 20%;
4. by humidity be 20% mixture of nanofibers put into fuse machine and carry out adding water hot melt, hot molten time is 30 minutes, and hot melting temperature is 200 DEG C, adds water and is spaced apart 3 minutes, and amount of water is 20% of nanofiber total amount;
3.3 active carbon particle filter courses as shown in Figure 2, its preparation method comprises the following steps:
1. the Graphene activated carbon being 1.5mm by polyvinyl chloride powder and particle diameter mixes, and mixed proportion is 6:4;
2. add polyethylene hot-melt adhesive at polyvinyl chloride powder and Graphene activated carbon mixture and stir pulping, pour in mould, wait for 70 minutes shaping;
3. shaping activated carbon fiber is put into baking oven to dry, drying time is 60 minutes, and bake out temperature is 90 DEG C, for taking out when to dry to its humidity be 20%;
4. by humidity be 20% activated carbon fiber put into fuse machine and carry out adding water hot melt, hot molten time is 40 minutes, and hot melting temperature is 180 DEG C, adds water and is spaced apart 5 minutes, and amount of water is 20% of activated carbon fiber total amount;
1 endosexine shown in Fig. 1,3.2 fibrous polymer nitride layer shown in 2 extexines and Fig. 2 are all fibre-forming polymers, and its preparation method comprises the following steps:
1. by poly vinylidene fluoride powder, dimethylacetylamide, GTWQ, ratio is 70:20:10, and homogeneous heating stirs pulping, and heating-up temperature is 50 DEG C, and mixing time is 10 hours;
2. add polyethylene glycol, polyethylene glycol addition is 3% of total amount, continues stirring 20 hours;
3. standing and defoaming forms casting solution, and inclined heated plate is 24 hours;
4. casting solution is through device for spinning spinned fiber polymer;
As shown in Figure 1, therebetween central layer 3, clamps parcel by endosexine 1, extexine 2, and clamping parcel step is as follows:
1. fibre-forming polymer is flat in plane mould, fibrous polymer object plane tiles aluminum oxide nanoparticles filter course, Graphene active carbon particle filter course, above filter course, insert one deck tunica fibrosa again, flatten after cooling 60 minutes shaping, obtain plane multi-layer composite ultrafiltration membrane;
2. open circles is curled into by the round mould of plane multi-layer composite ultrafiltration membrane transposition, round mould is put on heater and heats, heat time is 20 minutes, heating-up temperature is 180 DEG C, make tunica fibrosa end to end PUR be connected into circle, place in cold water and soak 48 hours, after the complete stripping of solvent, be namely fixed shaping hollow round multi-layer composite ultrafiltration membrane.
Claims (10)
1. a multi-layer composite ultrafiltration membrane, it is characterized in that: described composite hyperfiltration membrane cross section is multilayer hollow concentric structure, its sandwich construction is respectively endosexine, extexine, therebetween central layer, described endosexine, skin materials are porous fibre polymer, described therebetween central layer is filtering material layer, clamps parcel by endosexine, extexine.
2. a kind of multi-layer composite ultrafiltration membrane according to claim 1, described therebetween central layer is multiple filtration material composition, comprise Nano-particle filtration layer and active carbon particle filter course, the filtering material in each layer is different, is separated in the middle of different material layer by fibrous polymer nitride layer.
3. a kind of multi-layer composite ultrafiltration membrane according to claim 1, wherein said porous fibre polymer is the one in polyvinylidene fluoride PVDF or polyvinylchloride.
4. a kind of multi-layer composite ultrafiltration membrane according to claim 2, the nano material in wherein said nanoparticle filter course alive is one or more in zinc oxide ZnO, silica SiO2, alundum (Al2O3) Al2O3, and particle diameter is 1 ~ 100nm.
5. a kind of multi-layer composite ultrafiltration membrane according to claim 2, the activated carbon granule in wherein said active carbon particle filter course is one or more in graphene oxide (GRAPHENE OXIDE), cocos active carbon, and particle diameter is 0.1-3mm.
6. Nano-particle filtration layer according to claim 4, its preparation method comprises the following steps:
1. mixed with nano particle by flexible fiber powder, mixed proportion is 5:5 ~ 8:2;
2. mixture of nanofibers is added hot-melt adhesive stir pulping, binding agent percentage is 5% ~ 10%, pours in mould after pulping, wait for 60 ~ 120 minutes shaping;
3. shaping nanofiber is put into baking oven to dry, drying time is 30 ~ 60 minutes, and bake out temperature is 30 ~ 90 DEG C, for taking out when to dry to its humidity be 20%;
4. by humidity be 20% nanofiber put into fuse machine and carry out adding water hot melt, hot molten time is 10 ~ 60 minutes, and hot melting temperature is 100 ~ 200 DEG C, adds water and is spaced apart 3 ~ 8 minutes, and amount of water is 20% of nanofiber total amount.
7. active carbon particle filter course according to claim 5, its preparation method comprises the following steps:
1. mixed with activated carbon granule by flexible fiber powder, mixed proportion is 3:7 ~ 6:4;
2. NACF mixture is added hot-melt adhesive stir pulping, pour in mould, wait for 60 ~ 120 minutes shaping;
3. shaping activated carbon fiber is put into baking oven to dry, drying time is 30 ~ 60 minutes, and bake out temperature is 30 ~ 90 DEG C, for taking out when to dry to its humidity be 20%; ;
4. by humidity be 20% activated carbon fiber put into fuse machine and carry out adding water hot melt, hot molten time is 10 ~ 60 minutes, and hot melting temperature is 100 ~ 200 DEG C, adds water and is spaced apart 3 ~ 8 minutes, and amount of water is 20% of activated carbon fiber total amount.
8. a kind of multi-layer composite ultrafiltration membrane according to claim 4 or 5, described hot-melt adhesive is one or more in polyethylene binder, polypropylene adhesive, polyamide binders or polyester adhesive.
9. a kind of multi-layer composite ultrafiltration membrane according to claim 1, the preparation method of described multi-layer composite ultrafiltration membrane, it is characterized in that: by porous fibre polymer powder, solvent, stabilizing agent, ratio is (50:45:5) ~ (70:20:10), homogeneous heating stirs pulping, heating-up temperature is 30 ~ 80 DEG C, mixing time is 8 ~ 12 hours, after add pore former, pore former addition is 1% ~ 5% of total amount, continue stirring 15 ~ 30 hours, rear standing and defoaming forms casting solution, inclined heated plate is 24 ~ 30 hours, casting solution is through device for spinning spinned fiber film, tunica fibrosa is flat in plane mould, filter course on fiber face tiles, filter course is one or more of active carbon particle filter course or Nano-particle filtration layer, one deck tunica fibrosa is inserted again above filter course, flatten after cooling 30 ~ 60 minutes shaping, open circles is curled in the round mould of transposition, round mould is put on heater and heats, heat time is 10 ~ 30 minutes, heating-up temperature is 150 ~ 300 DEG C, make tunica fibrosa end to end PUR be connected into circle, place in cold water and soak 48 hours, after the complete stripping of solvent, namely shaping multi-layer composite ultrafiltration membrane is fixed.
10. the preparation method of multi-layer composite ultrafiltration membrane according to claim 9, is characterized in that: described heat stabilizer is GTWQ heat stabilizer, and described pore former is polyethylene glycol PEG, and described solvent is dimethylacetylamide.
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| CN104815564A (en) * | 2015-04-20 | 2015-08-05 | 刘显志 | Expanded polytetrafluoroethylene (ePTFE) film capable of isolating viruses or bacteria and preparation method thereof |
| CN105084572A (en) * | 2015-09-14 | 2015-11-25 | 广东正业科技股份有限公司 | Activated carbon fiber composite material and preparation method thereof as well as activated carbon fiber composite filter element |
| CN105129896A (en) * | 2015-08-11 | 2015-12-09 | 厦门建霖工业有限公司 | Antibacterial activated carbon-activated carbon fiber composite filter core and preparation method |
| CN106757532A (en) * | 2016-12-08 | 2017-05-31 | 东南大学 | A kind of preparation method of graphene-based doughnut |
| CN107308822A (en) * | 2017-07-03 | 2017-11-03 | 青岛农业大学 | A kind of method for analyzing milipore filter pore former Dissolution parameters |
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| CN107308822A (en) * | 2017-07-03 | 2017-11-03 | 青岛农业大学 | A kind of method for analyzing milipore filter pore former Dissolution parameters |
| CN108193377A (en) * | 2017-12-29 | 2018-06-22 | 浙江弘扬无纺新材料有限公司 | A kind of fabric containing active carbon nanoparticles, production method and its application |
| CN109731543A (en) * | 2019-01-15 | 2019-05-10 | 清华大学 | A kind of composite material nanometer fiber and its preparation and application |
| CN111715078A (en) * | 2019-03-20 | 2020-09-29 | 暨南大学 | Sandwich graphene oxide hollow fiber membrane with fixed interlamellar spacing and preparation method and application thereof |
| CN111715078B (en) * | 2019-03-20 | 2022-05-24 | 暨南大学 | Sandwich graphene oxide hollow fiber membrane with fixed interlayer spacing and preparation method and application thereof |
| CN115212734A (en) * | 2022-07-30 | 2022-10-21 | 淄博耀旭过滤机械有限公司 | Membrane filter disc for filter and preparation method thereof |
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Application publication date: 20150107 |