CN105214508B - The preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp - Google Patents
The preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp Download PDFInfo
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Abstract
The present invention is a kind of preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp, it is characterised in that：The electrostatic spinning milipore filter of the described element coating of nanofiber containing bamboo pulp uses bamboo fibre for coating liquid raw material, a kind of composite water comprising four-layer structure is prepared into using electrostatic spinning technique and spin coating painting method and handles filter membrane, and the preparation process of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp is as follows：Step（1）Prepare bamboo pulp nano-cellulose suspension；Step（2）Prepared polymer electrostatic spinning solution；Step（3）Electrostatic spinning；Step（4）：By step（3）The nonwoven layer prepared and the composite bed of electrostatic spinning layer are infiltrated with acid solution；Step（5）Prepare bamboo pulp nano-cellulose coating solution；Step（6）Solution is coated and cross-linking reaction.The electrostatic spinning milipore filter finished product of the element coating of nanofiber containing bamboo pulp of obtained four-layer structure is that composite water handles filter membrane.
Description
Technical field
The present invention relates to a kind of preparation method of electrostatic spinning milipore filter, a kind of nano-cellulose containing bamboo pulp is particularly disclosed
The preparation method of the electrostatic spinning milipore filter of coating, is applied in fields such as medicine, environmental protection, food.
Background technology
Bamboo fibre is a kind of cellulose fibre for extracting from the bamboo of growth naturally, be after cotton, fiber crops, hair, silk it
The fifth-largest natural fiber afterwards.Bamboo fibre is mainly used in the bamboo fibre fabric of craftwork manufacture, with bacteria growing inhibiting, cleans people
Body surrounding air, the function such as keep off infection.In addition to traditional application, how to be prepared into nano-cellulose and develop
Advanced nano composite material, uses it for the fields such as environmental protection, medicine, food and the energy, as grinding for competitively carrying out both at home and abroad
Study carefully problem.
Electrostatic spinning has been widely used for the system of nano fibrous membrane as a kind of effective technology for preparing nano material
It is standby.By changing the concentration, viscosity, flow velocity of spinning solution, institute's making alive can obtain the regulatable nanofiber of diameter.Pass through
The nano fibrous membrane that this method is obtained has open-celled structure good, high porosity, the advantages of specific surface area is big, and these are excellent
Performance has good application prospect in fields such as environmental improvement, chemical petroleum, medicine foods.Electrospun nano-fibers film is outstanding
It is in feed separation, and the field such as sewage disposal provides efficient filter medium.
Surface cladding process is that a kind of constraints is few, the selection space of the easy to operate and type of skill and material it is very big into
Functional coating liquid can be uniformly coated on substrate surface by film method, this method, and to follow-up technical finesse, including
There is provided further possibility for phase separation, crosslinking, natural film forming, function modified etc..
The work principle of filter of milipore filter is to carrying out mechanical screening by the particles of solute size of film surface.Traditional ultrafiltration
Membrane porosity is low, pore structure closing causes that flux is small, the low shortcoming of rejection, and the film prepared by electrostatic spinning technique has
The advantages of ultra-high throughput, big modified space.It is that substrate obtains milipore filter by electrospun fibers film to improve rejection, though
Its original flux is so reduced, but still is even thousands of times of the hundred times of traditional ultrafiltration membrane flux.Therefore with electrostatic spinning
There is high value in actual applications for the milipore filter that means are obtained.
The content of the invention
The invention aims to overcome the shortcomings of existing water process ultrafiltration membrane flux is low, resistance tocrocking is poor there is provided
A kind of have that flux is high, rejection effect is good, resistance tocrocking is good, the electrostatic of the stable chemical performance element coating of nanofiber containing bamboo pulp
The preparation method of spinning milipore filter.
What the present invention was realized in：A kind of preparation side of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp
Method, it is characterised in that：The electrostatic spinning milipore filter of the described element coating of nanofiber containing bamboo pulp uses bamboo fibre former for coating liquid
Material, is prepared into a kind of composite water comprising four-layer structure using electrostatic spinning technique and spin coating painting method and handles filter membrane,
The preparation process of the electrostatic spinning milipore filter of the described element coating of nanofiber containing bamboo pulp is as follows：
A, step（1）Prepare bamboo pulp nano-cellulose suspension：
（a）Being soaked in the mass fractions of 20~200 parts by weight it is 5~30% by the bamboo fibre powder of 1~10 parts by weight
In sodium hydroxide solution, temperature control stirs 1~3 hour at 30~80 DEG C, uses vavuum pump suction filtration, and the bamboo pulp obtained by washing is fine
Dimension obtains the bamboo pulp fiber powder of alkali process to neutrality after vacuum drying；
（b）Under the conditions of 2~70 DEG C of bath temperatures, by step（1）The bamboo pulp fiber powder of obtained alkali process is added to
In the reactor for filling 2,2,6,6- tetramethyl piperidine -1- oxygen radical TEMPO catalyst system and catalyzings, using the real-time monitoring of pH meters,
It is 3% sodium hydroxide solution regulation pH value that mass fraction, which is added dropwise, to pH value 9.5~10.0, and rear addition absolute ethyl alcohol terminates anti-
Should, the mass fraction stablized after centrifugation is 0.01~0.1% bamboo pulp nano-cellulose suspension；
B, step（2）Prepared polymer electrostatic spinning solution：The high molecular polymer magnetic agitation of spinning is dissolved in
In solvent, the spinning solution that mass fraction is 5~10% is obtained；
C, step（3）Electrostatic spinning：By step（2）Obtained spinning solution loads spinning head, and temperature is 40~50 DEG C, humidity
To carry out spinning in nonwoven layer in the environment of 45~50%, nonwoven layer and the composite bed of electrostatic spinning layer are obtained；
D, step（4）：By step（3）The nonwoven layer prepared and the composite bed acid that pH is 2~6 of electrostatic spinning layer
Immersion is moistened；
E, step（5）Prepare bamboo pulp nano-cellulose coating solution：By step（1）The mass fraction prepared is 0.01
~0.1% bamboo pulp nano-cellulose suspension is coated with sol evenning machine, is positioned over baking oven after standing 10~30 seconds, temperature is
50~100 DEG C, the time is 10~60 minutes, obtains bamboo pulp nano-cellulose layer, is covered in step（4）Obtained non-woven fabrics
Layer is with the composite bed of electrostatic spinning layer, being made the composite membrane of three-decker；
F, step（6）Solution is coated and cross-linking reaction：In step（5）Molecule is used on the composite membrane of obtained three-decker
Measure and be coated for 2000~20000 polyethylene glycol PEG with sol evenning machine, and progress is crosslinked instead in the case where temperature is 40~70 DEG C
Should, on the composite membrane of three-decker formed PEG protective layers, the element coating of nanofiber containing bamboo pulp of obtained four-layer structure it is quiet
Electrospun milipore filter finished product is that composite water handles filter membrane.
The step（2）The high molecular polymer that prepared polymer electrostatic spinning solution is used is poly terephthalic acid second two
The mixture of one or more of arbitrary proportions in alcohol ester, polyacrylonitrile, polyurethane, polystyrene；Described solvent is tetrahydrochysene
One or more of any ratios in furans, trifluoroacetic acid, chloroform, 1-METHYLPYRROLIDONE, DMF
The mixture of example.The thickness of described polymer electro-spun layer is 10~100 μm, and filament diameter is 1~10nm.Described step
（4）In acid solution be hydrochloric acid, sulfuric acid, acetic acid, oxalic acid in one or more of arbitrary proportions mixture.Described bamboo pulp nanometer
A diameter of 2~10nm of the bamboo pulp nanofiber of cellulose layer, mass fraction is 0.01~0.1%.
The beneficial effects of the invention are as follows：Compared with the milipore filter prepared by traditional water process ultrafiltration membrane preparation method, this
Milipore filter prepared by invention has flux height, rejection effect is good, resistance tocrocking is good, modified space is big, stable chemical performance excellent
Point, its ultrafiltration membrane flux is even thousands of times of the hundred times of traditional ultrafiltration membrane flux, contained bamboo fibre tool in its milipore filter
There is a bacteria growing inhibiting, clean surrounding air, the function such as keep off infection, and the spin coating cladding process that it is used is a kind of constraint
Condition is few, the selection space of the easy to operate and type of skill and material very big film build method, and this method can will be functional
Coating liquid is uniformly coated on substrate surface, and to follow-up technical finesse, including be separated, crosslinking, natural film forming, function change
There is provided further possibility for property etc..
Embodiment
A kind of preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp of the present invention use bamboo fibre for
Coating liquid raw material, is prepared into a kind of composite water comprising four-layer structure using electrostatic spinning technique and spin coating painting method and handles
Filter membrane, the preparation process of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp is as follows：
A, step（1）Prepare bamboo pulp nano-cellulose suspension：
（a）Being soaked in the mass fractions of 20~200 parts by weight it is 5~30% by the bamboo fibre powder of 1~10 parts by weight
In sodium hydroxide solution, temperature control stirs 1~3 hour at 30~80 DEG C, uses vavuum pump suction filtration, and the bamboo pulp obtained by washing is fine
Dimension obtains the bamboo pulp fiber powder of alkali process to neutrality after vacuum drying；
（b）Under the conditions of 2~70 DEG C of bath temperatures, by step（1）The bamboo pulp fiber powder of obtained alkali process is added to
In the reactor for filling 2,2,6,6- tetramethyl piperidine -1- oxygen radical TEMPO catalyst system and catalyzings, using the real-time monitoring of pH meters,
It is 3% sodium hydroxide solution regulation pH value that mass fraction, which is added dropwise, to pH value 9.5~10.0, and rear addition absolute ethyl alcohol terminates anti-
Should, the mass fraction stablized after centrifugation is 0.01~0.1% bamboo pulp nano-cellulose suspension；
B, step（2）Prepared polymer electrostatic spinning solution：The high molecular polymer magnetic agitation of spinning is dissolved in
In solvent, the spinning solution that mass fraction is 5~10% is obtained；
C, step（3）Electrostatic spinning：By step（2）Obtained spinning solution loads spinning head, and temperature is 40~50 DEG C, humidity
To carry out spinning in nonwoven layer in the environment of 45~50%, nonwoven layer and the composite bed of electrostatic spinning layer are obtained；
D, step（4）：By step（3）The nonwoven layer prepared and the composite bed acid that pH is 2~6 of electrostatic spinning layer
Immersion is moistened；
E, step（5）Prepare bamboo pulp nano-cellulose coating solution：By step（1）The mass fraction prepared is 0.01
~0.1% bamboo pulp nano-cellulose suspension is coated with sol evenning machine, is positioned over baking oven after standing 10~30 seconds, temperature is
50~100 DEG C, the time is 10~60 minutes, obtains bamboo pulp nano-cellulose layer, is covered in step（4）Obtained non-woven fabrics
Layer is with the composite bed of electrostatic spinning layer, being made the composite membrane of three-decker；
F, step（6）Solution is coated and cross-linking reaction：In step（5）Molecule is used on the composite membrane of obtained three-decker
Measure and be coated for 2000~20000 polyethylene glycol PEG with sol evenning machine, and progress is crosslinked instead in the case where temperature is 40~70 DEG C
Should, on the composite membrane of three-decker formed PEG protective layers, the element coating of nanofiber containing bamboo pulp of obtained four-layer structure it is quiet
Electrospun milipore filter finished product is that composite water handles filter membrane.
The step（2）The high molecular polymer that prepared polymer electrostatic spinning solution is used is poly terephthalic acid second two
The mixture of one or more of arbitrary proportions in alcohol ester, polyacrylonitrile, polyurethane, polystyrene；Described solvent is tetrahydrochysene
One or more of any ratios in furans, trifluoroacetic acid, chloroform, 1-METHYLPYRROLIDONE, DMF
The mixture of example.The thickness of described polymer electro-spun layer is 10~100 μm, and filament diameter is 1~10nm.Described step
（4）In acid solution be hydrochloric acid, sulfuric acid, acetic acid, oxalic acid in one or more of arbitrary proportions mixture.Described bamboo pulp nanometer
A diameter of 2~10nm of the bamboo pulp nanofiber of cellulose layer, mass fraction is 0.01~0.1%.
With reference to specific embodiment, the present invention is further elaborated.
Bamboo pulp fiber used in following examples is commercial goods, originates from Sichuan, and all reagents can be in traditional Chinese medicines collection
The purchase of chemical reagent Co., Ltd of group is obtained, and pH meter uses the thunder magnetic PHS- that Shanghai INESA Scientific Instrument Co., Ltd. produces
25 types, digital display ultrasound homogenous disperse machine is Shanghai Sheng Xi ultrasonic instruments Co., Ltd DS-1510DTH types.
Embodiment 1：
A kind of preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp, comprises the following steps：
A, step（1）Prepare bamboo pulp nano-cellulose sediment：
（a）Under 60 DEG C of bath temperatures, 10.0g bamboo fibres powder is being soaked in the hydrogen-oxygen that 120g mass fractions are 10%
Change in sodium solution, stirred 1.5 hours with 400rpm mixing speed, use vavuum pump suction filtration, the bamboo pulp fiber obtained by washing is into
Property, bamboo pulp fiber powder is dried in vacuo, vacuum is 0.1MPa, drying temperature is 70 DEG C, obtains the bamboo pulp of alkali process
Fiber dust；
（b）Under 20 DEG C of temperature conditionss, 5g steps are weighed（1）The bamboo pulp fiber powder of obtained alkali process, is added to Sheng
There are 2,2,6,6- tetramethyl piperidine -1- oxygen radicals（TEMPO）Catalyst system and catalyzing 0.001g, NaClO 15g and NaBr 0.01g water
It is stirred in the reactor of solution, speed of agitator is 700rpm, 3% sodium hydroxide regulation system pH values is added dropwise 11.0, make
With the real-time monitoring of pH meters, to pH value it is constant when, add 5ml absolute ethyl alcohol terminating reactions, after rotating speed 1000rpm centrifugations,
Supernatant is removed, bamboo pulp nano-cellulose sediment is obtained；
B, step（2）Prepare polyacrylonitrile electrostatic spinning solution：Weigh 10g polyacrylonitrile（PAN）It is dissolved in 90g N, N-
Dimethylformamide（DMF）, obtain the spinning solution of transparent and homogeneous；
C, step（3）Electrostatic spinning：By step（2）Obtained spinning solution is fitted into spinning head, carries out electrostatic spinning, receives
Substrate is polyester non-woven fabric, and the basic parameter of electrostatic spinning is：Voltage 15kV, spout aperture 0.5mm, spinning solution flow velocity
0.002mm/s, spinning head is to the distance of roller is received for 20cm, and spinning environment temperature is 35 DEG C, and ambient relative humidity is
20%, obtain PAN microfiltration membranes；
D, step（4）：By step（3）Obtained PAN microfiltration membranes pH value infiltrates for 4 hydrochloric acid solution；
E, step（5）Prepare bamboo pulp nano-cellulose coating solution：
（a）By 0.1g steps（1）Obtained bamboo pulp nano-cellulose is dispersed in 100g deionized waters, obtains mass fraction
For 0.1% bamboo pulp nano-cellulose coating liquid；
（b）By step（4）Obtained PAN microfiltration membranes, which are positioned over, scrapes on film device, by step 5（a）Obtained mass fraction
It is added to for 0.1% bamboo pulp nano-cellulose coating liquid in the gap of scraper and film surface, sets the distance of scraper and film surface as 50
μm, scraper translational speed is set to 1cm/s, starts motor, scraper is uniformly scraped the nano-cellulose coating liquid of film surface
Apply, after blade coating terminates, be dried 30 minutes, temperature is 60 DEG C.Obtain high hydrophilic fibrous layer, polypropylene nitrile layer and
Nonwoven fabric base bottom sandwich diaphragm；
F, step（6）Solution is coated and cross-linking reaction：By the polyethylene glycol that molecular weight is 500（PEG）Using step（5）Institute
The film mode stated is coated to the sandwich diaphragm surface of gained, and coating is baked to after terminating, and drying temperature is 60 DEG C,
Drying time is 30 minutes.Finally give PEG protective layers, high hydrophilic fibrous layer, polypropylene nitrile layer and nonwoven fabric base bottom
Four layers of composite membrane.
The composite membrane prepared under 0.2MPa constant pressure, filtering test, the composite membrane are carried out using PEG6000
Pure water flux be 83L/m2H, rejection is 92%.
Embodiment 2：
A kind of preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp, comprises the following steps：
A, step（1）Prepare bamboo pulp nano-cellulose sediment：
（a）Under 70 DEG C of bath temperatures, 15.0g bamboo fibres powder is being soaked in the hydrogen-oxygen that 100g mass fractions are 20%
Change in sodium solution, stirred 1.5 hours with 400rpm mixing speed, use vavuum pump suction filtration, the bamboo pulp fiber obtained by washing is into
Property, bamboo pulp fiber powder is dried in vacuo, vacuum is 0.1MPa, drying temperature is 70 DEG C, obtains the bamboo pulp of alkali process
Fiber dust；
（b）Under 20 DEG C of temperature conditionss, 5g steps are weighed（1）The bamboo pulp fiber powder of obtained alkali process, is added to Sheng
It is stirred, stirs in the reactor for having TEMPO catalystic converter system 0.001g, NaClO 15g and NaBr 0.01g aqueous solution
Rotating speed is 700rpm, and 3% sodium hydroxide regulation system pH values are added dropwise 11.0, are monitored using pH meters are real-time, constant to pH value
When, 5ml absolute ethyl alcohol terminating reactions are added, after rotating speed 1000rpm centrifugations, supernatant is removed, obtains bamboo pulp nanofiber
Plain sediment；
B, step（2）Prepare polyacrylonitrile electrostatic spinning solution：Weigh 10g polyacrylonitrile（PAN）It is dissolved in 90g N, N-
Dimethylformamide（DMF）, obtain the spinning solution of transparent and homogeneous；
C, step（3）Electrostatic spinning：By step（2）Obtained spinning solution is fitted into spinning head, carries out electrostatic spinning, receives
Substrate is polyester non-woven fabric, and the basic parameter of electrostatic spinning is：Voltage 10kV, spout aperture 1.0mm, spinning solution flow velocity
0.002mm/s, spinning head is to the distance of roller is received for 20cm, and spinning environment temperature is 25 DEG C, and ambient relative humidity is
30%, obtain PAN microfiltration membranes；
D, step（4）：By step（3）Obtained PAN microfiltration membranes are infiltrated with pH for 5 hydrochloric acid solution；
E, step（5）Prepare bamboo pulp nano-cellulose coating solution：
（a）By 0.5g steps（1）Obtained bamboo pulp nano-cellulose is dispersed in 100g deionized waters, obtains mass fraction
For 0.5% bamboo pulp nano-cellulose coating liquid；
（b）By step（4）Obtained PAN microfiltration membranes, which are positioned over, scrapes on film device, by step 5（a）Obtained mass fraction
It is added to for 0.5% bamboo pulp nano-cellulose coating liquid in the gap of scraper and film surface, sets the distance of scraper and film surface as 50
μm, scraper translational speed is set to 1cm/s, starts motor, scraper is uniformly scraped the nano-cellulose coating liquid of film surface
Apply, after blade coating terminates, be dried 30 minutes, temperature is 60 DEG C.Obtain high hydrophilic fibrous layer, polypropylene nitrile layer and
Nonwoven fabric base bottom sandwich diaphragm；
F, step（6）Solution is coated and cross-linking reaction：By the polyethylene glycol that molecular weight is 2000（PEG）Using step（5）
Described film mode is coated to the sandwich diaphragm surface of gained, and coating is baked to after terminating, and drying temperature is 60
DEG C, drying time is 30 minutes.Finally give PEG protective layers, high hydrophilic fibrous layer, polypropylene nitrile layer and nonwoven fabric base bottom
Four layers of composite membrane of layer.
The composite membrane prepared under 0.2MPa constant pressure, filtering test, the composite membrane are carried out using PEG6000
Pure water flux be 50L/m2H, rejection is 97%.
Claims (5)
1. a kind of preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp, it is characterised in that：Described contains
The electrostatic spinning milipore filter of bamboo pulp nanofiber element coating uses bamboo fibre for coating liquid raw material, utilizes electrostatic spinning technique and even
Glue painting method is prepared into a kind of composite water processing filter membrane comprising four-layer structure, and described nano-cellulose containing bamboo pulp is applied
The preparation process of the electrostatic spinning milipore filter of layer is as follows：
A, step（1）Prepare bamboo pulp nano-cellulose suspension：
（a）The bamboo fibre powder of 1~10 parts by weight is being soaked in hydrogen-oxygen of the mass fraction of 20~200 parts by weight for 5~30%
Change in sodium solution, temperature control stirs 1~3 hour at 30~80 DEG C, uses vavuum pump suction filtration, the bamboo pulp fiber obtained by washing is extremely
The bamboo pulp fiber powder of alkali process is obtained after neutrality, vacuum drying；
（b）Under the conditions of 2~70 DEG C of bath temperatures, by step（1）The bamboo pulp fiber powder of obtained alkali process, which is added to, to be filled
In the reactor of 2,2,6,6- tetramethyl piperidine -1- oxygen radical TEMPO catalyst system and catalyzings, using the real-time monitoring of pH meters, it is added dropwise
Mass fraction is 3% sodium hydroxide solution regulation pH value, and to pH value 9.5~10.0, absolute ethyl alcohol terminating reaction is added afterwards,
The mass fraction stablized after centrifugation is 0.01~0.1% bamboo pulp nano-cellulose suspension；
B, step（2）Prepared polymer electrostatic spinning solution：The high molecular polymer magnetic agitation of spinning is dissolved in solvent
In, obtain the spinning solution that mass fraction is 5~10%；
C, step（3）Electrostatic spinning：By step（2）Obtained spinning solution loads spinning head, and temperature is 40~50 DEG C, and humidity is 45
Spinning is carried out in the environment of~50% in nonwoven layer, nonwoven layer and the composite bed of electrostatic spinning layer is obtained；
D, step（4）：By step（3）The nonwoven layer prepared and the composite bed of electrostatic spinning layer are soaked with pH for 2~6 acid solution
Profit；
E, step（5）Prepare bamboo pulp nano-cellulose coating solution：By step（1）The mass fraction prepared be 0.01~
0.1% bamboo pulp nano-cellulose suspension is coated with sol evenning machine, is positioned over baking oven after standing 10~30 seconds, temperature is 50
~100 DEG C, the time is 10~60 minutes, obtains bamboo pulp nano-cellulose layer, is covered in step（4）Obtained nonwoven layer
With on the composite bed of electrostatic spinning layer, the composite membrane of three-decker is made；
F, step（6）Solution is coated and cross-linking reaction：In step（5）Used on the composite membrane of obtained three-decker molecular weight for
2000~20000 polyethylene glycol PEG is coated with sol evenning machine, and carries out cross-linking reaction in the case where temperature is 40~70 DEG C,
PEG protective layers, the Static Spinning of the element coating of nanofiber containing bamboo pulp of obtained four-layer structure are formed on the composite membrane of three-decker
Silk milipore filter finished product is that composite water handles filter membrane.
2. the preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp according to claim 1, its
It is characterised by：The step（2）The high molecular polymer that prepared polymer electrostatic spinning solution is used is poly terephthalic acid second
The mixture of one or more of arbitrary proportions in diol ester, polyacrylonitrile, polyurethane, polystyrene；Described solvent is four
It is one or more of any in hydrogen furans, trifluoroacetic acid, chloroform, 1-METHYLPYRROLIDONE, DMF
The mixture of ratio.
3. the preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp according to claim 1, its
It is characterised by：The thickness of described polymer electro-spun layer is 10~100 μm, and filament diameter is 1~10nm.
4. the preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp according to claim 1, its
It is characterised by：Described step（4）In acid solution be the mixed of one or more of arbitrary proportions in hydrochloric acid, sulfuric acid, acetic acid, oxalic acid
Compound.
5. the preparation method of the electrostatic spinning milipore filter of the element coating of nanofiber containing bamboo pulp according to claim 1, its
It is characterised by：A diameter of 2~10nm of the bamboo pulp nanofiber of described bamboo pulp nano-cellulose layer, mass fraction is 0.01~
0.1%。
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| CN106000105A (en) * | 2016-07-07 | 2016-10-12 | 上海洁晟环保科技有限公司 | Preparation method of pore size-adjustable high-flux nanofiber composite ultra-filtration membrane |
| CN107240704A (en) * | 2017-06-21 | 2017-10-10 | 大连理工大学 | A kind of method of accurate control composite membrane skin thickness |
| CN107502979B (en) * | 2017-07-21 | 2020-04-17 | 阜南县大自然工艺品有限公司 | Fine bamboo filament and high molecular compound blending material with skin-core structure and preparation method thereof |
| CN107353713A (en) * | 2017-07-31 | 2017-11-17 | 安吉县怡成竹木工艺品厂 | A kind of preparation method of bamboo powder base composite coating |
| CN107569914B (en) * | 2017-09-16 | 2019-08-16 | 约柏滤材工业(上海)有限公司 | A kind of preparation method of non-woven fabric compounded fuel oil filter material |
| CN111379074A (en) * | 2018-12-28 | 2020-07-07 | 张家港市清泉水处理有限公司 | Preparation method of cellulose nanofiber composite membrane for treating printing and dyeing wastewater |
| CN110075815B (en) * | 2019-05-24 | 2020-12-25 | 西北大学 | Novel haze efficient filtering silver nanowire net and MOFs composite porous fiber film material and preparation method thereof |
| CN113508940A (en) * | 2020-04-10 | 2021-10-19 | 中国科学院大连化学物理研究所 | Mask with micro-nano gradient structure |
| CN112934000B (en) * | 2021-03-09 | 2022-03-25 | 宁波大学 | Modification method of PVDF (polyvinylidene fluoride) microfiltration membrane |
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| CN102481527A (en) * | 2008-10-07 | 2012-05-30 | 纽约州立大学研究基金会 | High flux high efficiency nanofiber membranes and methods of production thereof |
| CN102806021A (en) * | 2012-07-27 | 2012-12-05 | 东华大学 | Method for preparing cellulose nanocrystal/electrostatic spinning nanofiber filter film |
| CN103167904A (en) * | 2010-10-26 | 2013-06-19 | 东丽株式会社 | Separation membrane, separation membrane element and separation membrane production method |
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| CN102481527A (en) * | 2008-10-07 | 2012-05-30 | 纽约州立大学研究基金会 | High flux high efficiency nanofiber membranes and methods of production thereof |
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Effective date of registration: 20230306 Address after: Room 4065, Floor 4, Building 22, No. 85, Mingnan Road, Zhongshan Street, Songjiang District, Shanghai, 2016 Patentee after: Shanghai Zhanheng Environmental Protection Technology Co.,Ltd. Address before: 9B 2F, No. 100, Haike Road, Zhangjiang High-tech Park, Pudong New Area, Shanghai, October 2012 Patentee before: SHANGHAI JIESHENGYUAN TECH CO.,LTD. |