CN106563363A - Production method of hot-melt high-molecular hollow fiber microporous membrane - Google Patents
Production method of hot-melt high-molecular hollow fiber microporous membrane Download PDFInfo
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- CN106563363A CN106563363A CN201510659161.6A CN201510659161A CN106563363A CN 106563363 A CN106563363 A CN 106563363A CN 201510659161 A CN201510659161 A CN 201510659161A CN 106563363 A CN106563363 A CN 106563363A
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Abstract
The invention relates to a production method of a hot-melt high-molecular hollow fiber microporous membrane. The production method comprises the following steps: mixing a hot-melt high-molecular material and CAB, spinning by a melt spinning method, drafting and carrying out heat treatment to obtain hot-melt high-molecular/CAB hollow fiber; and placing the hollow fiber into acetone at normal temperature to dissolve out a CAB phase so as to obtain the hot-melt high-molecular hollow fiber microporous membrane. The prepared hollow fiber microporous membrane has advantages of high porosity, uniform pore-size distribution, excellent filtration performance, low cost, high added value, etc., is environment-friendly, and is a high-quality base material in the field of membrane separation.
Description
Technical field
The present invention relates to a kind of production method of hot melt polymeric hollow fiber microporous barrier, belongs to technical field of membrane separation.
Background technology
Hollow fiber microporous membrane is a kind of profile in the micropore of cavity in a large amount of perforating fibers, the seperation film with self-supporting effect is dispersed with threadiness, fibre wall, is an important kind of technical field of membrane separation.The fibre wall of hollow fiber microporous membrane has selective penetrated property, and outwards or from outside to inside chamber passes through hollow fiber walls from inner chamber can to make some components in gas, liquid mixture, and while there is crown_interception to other components.
As a kind of important membrane separation technique, hollow-fibre membrane has that resistance to pressure is good, be easy to backwash, without the need for supporter, intensity is high, the loading density of membrane module controlled shape, hollow-fibre membrane in membrane module is big, unit volume membrane area is big, flux is big the features such as.Also, by selecting suitable forming technique, technological parameter and raw material, can control to obtain the hollow-fibre membrane with different pore size distribution and filter effect, including doughnut reverse osmosis membrane, hollow fiber ultrafiltration membrane and doughnut miillpore filter.Therefore the industrial field such as seawater or brackish water desalination, drink water purifying, sewage disposal, haemodialysis, gas separation is widely used in, and is considered as one of most promising water technology.
At present, the preferable doughnut membrane preparation method of industrialization mainly includes solution spinning and melt spinning method.
Solution spinning mainly by dry-wet, wet-wet spinning shaping, then makes fiber membranous wall produce micropore using double diffusion effect, forms hollow-fibre membrane.The size of hollowness of fibre is by controlling the size of spinneret mesopore and being passed through the species and its speed of gas or fluid determining.It is general to adjust the flux of aperture, voidage and the doughnut of doughnut micropore by changing coagulation bath composition and curing condition.Solution spinning prepare hollow-fibre membrane there are problems that preparation technology flow process is complicated, quality is unstable, solvent select it is difficult and.At present, the country still cannot the excellent hollow-fibre membrane of the quality of production.
Melt-spun doughnut is by special spinneret plate technique and Reasonable adjustment spinning process.Then make fiber membranous wall produce micropore using pulling method or thermally induced phase separation, form hollow-fibre membrane.Thermoplastic macromolecule material relies on its excellent solvent resistance, mechanical strength and relatively low cost, becomes the preferred material of melt-spun hollow-fibre membrane.But, make fiber membranous wall produce micropore by pulling method, needs add a certain amount of inorganic particle in doughnut, the spinnability and stability of spinning process of doughnut are so greatly lowered, while the mechanical property of hollow fiber microporous membrane can be reduced.
The B of existing patent CN 101862601 is disclosed " a kind of polypropylene hollow fiber microporous membrane and preparation method thereof ", with 15%～45% polypropylene, 50%～80% diluent and the mixing of 0.1%～5% additive, hollow fiber microporous membrane is prepared based on Thermal inactive process.The diluent of the method is the combination of one or more in dibutyl phthalate, fatty amine, calcium stearate, isopropyl amine alcohol, methylbenzene propyl ester, vegetable oil or diphenyl ether, and waste water pollutes the environment, and cannot recycling, therefore production cost is higher.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of production method of hot melt polymeric hollow fiber microporous barrier.
The present invention technical solution be：A kind of production method of hot melt polymeric hollow fiber microporous barrier, the method is by hot melt macromolecular material and diluent acetylbutyrylcellulose（CAB）Kneaded in the ratio of the wt% of hot melt macromolecular material 40～70；Melt spinning method is adopted afterwards, and at 160 DEG C～240 DEG C untwisted yarn is spun into；Give drawing-off at 70 DEG C～110 DEG C, 100 DEG C～150 DEG C heat treatments of Jing are obtained hot melt macromolecule/CAB doughnuts；Then at normal temperatures, the doughnut is placed in acetone, dissolution CAB phases therein make hot melt polymeric hollow fiber microporous barrier.
Further, the hot melt macromolecular material is polypropylene（PP）Or polyethylene（PE）.
The substantive distinguishing features of the protrusion of technical solution of the present invention and significant progress are mainly reflected in：
（1）The selected cellulose esters of the present invention is a kind of green organic ester of natural environmental-protective, and it quickly can be dissolved in solvent at normal temperatures and pressures, and can be with recycling；
（2）Hot melt polymeric hollow fiber microporous barrier using present invention production is functional, and degree of hollowness 25%～45%, porosity 40%～55% can meet the application requirement in UF membrane field；
（3）Technical process that the present invention prepares hollow-fibre membrane is simple, membrane structure is easily-controllable, cost is relatively low；
（4）Hollow fiber microporous membrane of the present invention has excellent, inexpensive porosity height, even aperture distribution, strainability, high added value, advantages of environment protection, is the basic material of UF membrane field high-quality.
Description of the drawings
Fig. 1 is hot melt polymeric hollow fiber microporous barrier morphosis figure of the present invention.Wherein,
Fig. 1 a are the electron microscopes in hot melt polymeric hollow fiber microporous barrier section of the present invention；
Fig. 1 b are the electron microscopes of the morphosis on hot melt polymeric hollow fiber microporous barrier of the present invention.
Specific embodiment
The present invention prepares microporous hollow fiber film using thermally induced phase separation, it is mainly raw material and diluent mixing at a higher temperature, forms homogeneous spinning solution and is spun into doughnut, is separated in strand cooling procedure, diluent is extracted with solvent, obtains microporous hollow fiber film.Details are as follows for the method：By the close hot melt macromolecular material of fusing point and diluent acetylbutyrylcellulose（CAB）Kneaded in the ratio of the wt% of hot melt macromolecule 40～70, then melt spinning method is adopted, at 160 DEG C～240 DEG C untwisted yarn is spun into, at 70 DEG C～110 DEG C drawing-off is given, 100 DEG C～150 DEG C heat treatments of Jing, that is, be obtained hot melt macromolecule/CAB blending doughnuts.At normal temperatures, the doughnut is placed in acetone, dissolution CAB phases therein make hot melt polymeric hollow fiber microporous barrier.Wherein, hot melt macromolecular material can be polypropylene（PP）, or polyethylene（PE）.Meanwhile, by adjusting hot melt macromolecule/CAB proportionings and technique, may be manufactured without same line density, different pore size, the hot melt polymeric hollow fiber microporous barrier of different porosities, to adapt to the requirement of different application occasion.
Several specific embodiments using technical solution of the present invention are presented herein below, they are only provided as an example, are not intended as limiting the application of the present invention.The equivalent of all operating conditions, is within the scope of the present invention.
Embodiment
1
：
PP and CAB is blended in the ratio of PP45 wt%, doughnut is spun into 190 DEG C of temperature, the drawing-off at 100 DEG C, Jing after 130 DEG C of sizings, then it is placed in acetone at room temperature, dissolution CAB therein, degree of hollowness 40%, the PP hollow fiber microporous membranes of porosity 50% is obtained.
Embodiment
2
：
PP and CAB is blended in the ratio of PP50 wt%, doughnut is spun into 200 DEG C of temperature, the drawing-off at 100 DEG C, Jing after 130 DEG C of sizings, then it is placed in acetone at room temperature, dissolution CAB therein, degree of hollowness 45%, the PP hollow fiber microporous membranes of porosity 55% is obtained.
Embodiment
3
：
PP and CAB is blended in the ratio of PP65 wt%, doughnut is spun into 220 DEG C of temperature, the drawing-off at 100 DEG C, Jing after 130 DEG C of sizings, then it is placed in acetone at room temperature, dissolution CAB therein, degree of hollowness 30%, the PP hollow fiber microporous membranes of porosity 40% is obtained.
Embodiment
4
：
PE and CAB is blended in the ratio of PE55 wt%, doughnut is spun into 170 DEG C of temperature, the drawing-off at 70 DEG C, Jing after 100 DEG C of sizings, then it is placed in acetone at room temperature, dissolution CAB therein, degree of hollowness 45%, the PE hollow fiber microporous membranes of porosity 50% is obtained.
Embodiment
5
：
PE and CAB is blended in the ratio of PE70 wt%, doughnut is spun into 160 DEG C of temperature, the drawing-off at 70 DEG C, Jing after 100 DEG C of sizings, then it is placed in acetone at room temperature, dissolution CAB therein, degree of hollowness 45%, the PE hollow fiber microporous membranes of porosity 40% is obtained.
In sum, the hot melt hollow fiber microporous membrane for being prepared using the inventive method（As seen in figure la and lb）Porosity height, even aperture distribution, strainability are excellent, inexpensive, high added value, environmental friendliness, the basic material that can provide high-quality for UF membrane field.
Claims (2)
1. a kind of production method of hot melt polymeric hollow fiber microporous barrier, it is characterised in that：The method is to be kneaded hot melt macromolecular material and diluent CAB in the ratio of the wt% of hot melt macromolecular material 40～70；Melt spinning method is adopted afterwards, and at 160 DEG C～240 DEG C untwisted yarn is spun into；Give drawing-off at 70 DEG C～110 DEG C, 100 DEG C～150 DEG C heat treatments of Jing are obtained hot melt macromolecule/CAB doughnuts；Then at normal temperatures, the doughnut is placed in acetone, dissolution CAB phases therein make hot melt polymeric hollow fiber microporous barrier.
2. the production method of a kind of hot melt polymeric hollow fiber microporous barrier according to claim 1, it is characterised in that：The hot melt macromolecular material is PP or PE.
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| CN201510659161.6A CN106563363A (en) | 2015-10-12 | 2015-10-12 | Production method of hot-melt high-molecular hollow fiber microporous membrane |
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| CN201510659161.6A CN106563363A (en) | 2015-10-12 | 2015-10-12 | Production method of hot-melt high-molecular hollow fiber microporous membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101225A (en) * | 2020-01-03 | 2020-05-05 | 镇江市高等专科学校 | Preparation method of polyacrylonitrile nano-fiber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6623639B2 (en) * | 1999-03-19 | 2003-09-23 | Bend Research, Inc. | Solvent-resistant microporous polybenzimidazole membranes |
| CN1654113A (en) * | 2005-01-27 | 2005-08-17 | 浙江大学 | Hydrophilic modified preparation method for polyethylene hollow fiber microporous membrane |
| CN101337159A (en) * | 2008-08-08 | 2009-01-07 | 东华大学 | Preparation method of thermal plasticity high polymer melt-blown micro/nano fibrous membrane material |
| CN103933880A (en) * | 2014-03-24 | 2014-07-23 | 贵州省材料产业技术研究院 | Preparation method of high-throughput hydrophilic modified polypropylene hollow fiber membrane |
| CN105498555A (en) * | 2014-09-24 | 2016-04-20 | 中国石油化工股份有限公司 | Production method of thermoplastic high-molecular material hollow fiber micro-pore membrane |
-
2015
- 2015-10-12 CN CN201510659161.6A patent/CN106563363A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6623639B2 (en) * | 1999-03-19 | 2003-09-23 | Bend Research, Inc. | Solvent-resistant microporous polybenzimidazole membranes |
| CN1654113A (en) * | 2005-01-27 | 2005-08-17 | 浙江大学 | Hydrophilic modified preparation method for polyethylene hollow fiber microporous membrane |
| CN101337159A (en) * | 2008-08-08 | 2009-01-07 | 东华大学 | Preparation method of thermal plasticity high polymer melt-blown micro/nano fibrous membrane material |
| CN103933880A (en) * | 2014-03-24 | 2014-07-23 | 贵州省材料产业技术研究院 | Preparation method of high-throughput hydrophilic modified polypropylene hollow fiber membrane |
| CN105498555A (en) * | 2014-09-24 | 2016-04-20 | 中国石油化工股份有限公司 | Production method of thermoplastic high-molecular material hollow fiber micro-pore membrane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101225A (en) * | 2020-01-03 | 2020-05-05 | 镇江市高等专科学校 | Preparation method of polyacrylonitrile nano-fiber |
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Application publication date: 20170419 |