CN101966430B - Preparation method of high-efficient hydrophilic modified polypropylene hollow fibrous membrane - Google Patents
Preparation method of high-efficient hydrophilic modified polypropylene hollow fibrous membrane Download PDFInfo
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- CN101966430B CN101966430B CN2010105004335A CN201010500433A CN101966430B CN 101966430 B CN101966430 B CN 101966430B CN 2010105004335 A CN2010105004335 A CN 2010105004335A CN 201010500433 A CN201010500433 A CN 201010500433A CN 101966430 B CN101966430 B CN 101966430B
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Abstract
The invention discloses a preparation method of a high-efficient hydrophilic modified polypropylene hollow fibrous membrane, comprising the following steps: (1) synthesis of polyethylene glycol grafted modified polypropylene: at high temperature, fusing polypropylene oxide wax, adding polyethylene glycol in a polypropylene oxide wax fusant, simultaneously adding a small amount of acid catalyst, fusing at the high temperature of 120-200 DEG C after introducing nitrogen in, and carrying out condensation reaction; (2) blending melt spinning: blending the polyethylene glycol grafted modified polypropylene with polypropylene, adding the mixture into a high-temperature melt spinning machine, carrying out blending melt stretch spinning at the temperature of 200-220 DEG C, and preparing the polyethylene glycol hydrophilic modified polypropylene hollow fibrous membrane. The invention has simple preparation method, and the prepared polypropylene hollow fibrous membrane has excellent lasting hydrophily, is mainly used for filtering aqueous liquid, can be used for films for sewage treatment and is more possibly used for protein isolation and the like.
Description
Technical field
The present invention relates to the hydrophobic polymer separation membrane material is carried out the method for hydrophiling and biocompatibility modification, be specifically related to a kind of preparation method who contains poly ethyldiol modified polypropylene hollow fiber membrane.
Background technology
Microporous polypropylene membrane is because its simple production technology, good performance, since coming out, promptly by commercialization rapidly, and obtained using widely.See that from the pore size of microporous polypropylene membrane and aspect such as acidproof, alkali resistance and low-resistance value it is a kind of suitable battery separator and diaphragm material, be used for battery industry in a large number; The critical surface tension of microporous polypropylene membrane is 35 dynes per centimeter; It can let water see through under certain pressure; And mechanical strength is high, good toughness, can be used as membrane for water treatment, is applied at aspects such as preparation water for beverages, medicament water, ultra-pure water and desalinization, sewage disposals; Utilize the good gas permeability of microporous polypropylene membrane, can be used as air cleaning units such as air purifier, special deduster.Microporous polypropylene membrane because nontoxic, gas-premeable good, is that a kind of more satisfactory medicine equipment is used film, is used as like the artificial lung membrane oxygenator etc.; In addition, because the good mechanical performance of microporous polypropylene membrane, it can also be as support membrane, or replaces other diffusion barriers to be used for the separating substances and the purifying field of some molecular levels.But the microporous polypropylene membrane surface hydrophilicity is poor, is prone to static electrification, and these shortcomings have restricted further applying of they.Microporous polypropylene membrane being carried out modification, utilize the function of introducing group to improve the deficiency on the film surface property, get up both advantages again simultaneously, increase new performance, is a kind of simple and efficient ways that enlarges the microporous polypropylene membrane purposes.
Develop the surface modification that multiple distinct methods can be used for microporous polypropylene membrane at present, mainly be divided into physical method and chemical method.The former is like the physics cladding process, and it is the simplest surface modifying method, promptly use hydrophilizing agent (like alcohol, surfactant, polyelectrolyte complex compound etc.) processing microporous barrier or the microporous barrier direct impregnation in Polymer Solution, evaporating solvent then.Though this technology is simple, owing to just fix surface modifier, cause surface modifier to be prone to run off through physisorption, hydrophily in use descends gradually.It is in the micropore of microporous polypropylene membrane, to add monomer and corresponding initator makes monomer polymerization that original position is filled polymerization; The functional film material that can obtain modification is to improve the hydrophily in film surface and the fenestra; But, thereby the separating property and the mechanical performance of film have been influenced greatly in the hole because polymerisation carries out.The method of chemical modification has a lot, comprises with irradiation such as corona, ultraviolet, plasmas simply handling, and can improve the surface property of material in a short time, but along with the prolongation of time can be returned to original level again.The method that can keep the modification performance for a long time generally is to be fixed on material surface to functional macromolecule through chemical bonding, and wherein glycerol polymerization method has certain advantage.The application number of the applicant's application is 200310108528, and adopting glycosyl compound is the modify and graft monomer, obtains polymer separation film through this method, and hydrophily and biocompatibility improve, and can keep for a long time.But need form by glycosyl and material chemical combination such as alkene class, ester class as the glycosyl compound of grafted monomers, the complexity of increase technology, in addition; Because the modifier that adopts is the thin malt sugar monomer; Its synthetic difficulty costs an arm and a leg, and then has greatly increased the cost of hydrophilic modifying film.Therefore, be necessary to develop efficient, stable, economic polypropylene screen hydrophilic modification method.
Summary of the invention
The present invention mainly is the shortcoming that overcomes prior art; The method of the hydrophobic polypropylene diffusion barrier being carried out hydrophiling and biocompatibility modification is provided, technology of the present invention simple and make polypropylene separation membrane good hydrophilic property, water flux big, be difficult for that static electrification, protein adsorption quantity are few, blood compatibility has largely and improves.Above-mentioned purpose of the present invention mainly is able to solve through following inventive concept: through the synthesizing polyethylene glycol graft modification polypropylene, and be that additive and polypropene blended carries out melt spinning again and prepares and have the durable hydrophilic property polypropylene hollow fiber membrane with it.
A kind of preparation method of efficient hydrophilic modifying polypropylene hollow fiber membrane may further comprise the steps:
(1) the polyethylene glycol graft modification polypropylene is synthetic: under hot conditions with the fusion of its chlorinated polypropylene wax; In its chlorinated polypropylene wax melt, add polyethylene glycol again; Add the small amount of acid catalyst simultaneously, fusion under 120～200 ℃ of hot conditions behind the feeding nitrogen, and carry out condensation reaction; Wherein the quality of polyethylene glycol is 40～80% of an its chlorinated polypropylene wax amount; The quality of acid catalyst is 0.1～1% of an its chlorinated polypropylene wax amount, reacts after 4～12 hours, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene;
(2) blend melt spinning: prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend; Blend adds in the general high-temperature fusion spinning-drawing machine; Under 200～220 ℃ of conditions, carry out the fusion drawn spinning; Make polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material, wherein polyethylene glycol graft modification polypropylene mass percent is 5～30% in the blend, and the polypropylene mass percent is 95～70%; To guarantee carrying out smoothly of melt spinning, spinning solution is satisfied to be higher than critical concentration and to be lower than limiting viscosity.
Above-mentioned its chlorinated polypropylene wax is any in low-density its chlorinated polypropylene wax and the high density its chlorinated polypropylene wax, and its molecular weight is 2000～10000.
Above-mentioned acid catalyst is any in nitric acid, phosphoric acid, benzoic acid and the citric acid.
The molecular weight of above-mentioned polyethylene glycol is 400～2000.
The present invention has following advantage:
It is raw material that the present invention adopts its chlorinated polypropylene wax, and through the synthetic preparation of elevated temperature heat method of condensing polyethylene glycol graft modification polypropylene, synthetic method is simple, and grafting efficiency is high; In addition; With the polyethylene glycol graft modification polypropylene is additive; Carry out blend and carry out melt spinning preparing hollow-fibre membrane with polypropylene, it is long-pending in the richness of polypropylene separation membrane hole surface to help polyethylene glycol, and improves it in polypropylene separation membrane dispersiveness and stable; Prepared hollow-fibre membrane not only can improve the polypropylene separation membrane surface hydrophilicity, can also improve the hydrophily of diffusion barrier hole surface simultaneously.
Of the present invention simple through blend melt spinning hydrophilic modifying preparation method, spray silk jet stability is good in the spinning process, and the tunica fibrosa morphosis can be controlled through the condition of regulating spinning process at an easy rate, is suitable for suitability for industrialized production.
The specific embodiment
Through specific embodiment, technical scheme of the present invention is further described below.
Embodiment 1:
With 1 part of molecular weight is that 2000 low-density its chlorinated polypropylene wax carries out fusion under 120 ℃ of hot conditions; The molecular weight that in reactor, adds 0.4 part is 400 polyethylene glycol and 0.001 part phosphoric acid; Insulation and feeding nitrogen carry out condensation reaction; React after 4 hours cooling naturally, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene; Prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend, and wherein polyethylene glycol graft modification polypropylene mass percent is 5%, and the polypropylene mass percent is 95%; Blend is added melt spinning machine under 200 ℃ of conditions, carry out the fusion drawn spinning; Make and contain polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material; Prepared modified polypropene hollow-fibre membrane surface water contact angle is 78 °, and pure water flux is 560kg/m under the test pressure of 0.1MPa
2H.
Embodiment 2:
With 1 part of molecular weight is that 4000 low-density its chlorinated polypropylene wax carries out fusion under 160 ℃ of hot conditions; The molecular weight that in reactor, adds 0.6 part is 600 polyethylene glycol and 0.005 part benzoic acid; Insulation and feeding nitrogen carry out condensation reaction; React after 6 hours cooling naturally, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene; Prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend, and wherein polyethylene glycol graft modification polypropylene mass percent is 10%, and the polypropylene mass percent is 90%; Blend is added melt spinning machine under 210 ℃ of conditions, carry out the fusion drawn spinning; Make and contain polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material; Prepared modified polypropene hollow-fibre membrane surface water contact angle is 72 °, and pure water flux is 660kg/m under the test pressure of 0.1MPa
2H.
Embodiment 3:
With 1 part of molecular weight is that 8000 low-density its chlorinated polypropylene waxes carry out fusion under 180 ℃ of hot conditions; The molecular weight that in reactor, adds 0.8 part is 1000 polyethylene glycol and 0.05 part citric acid; Insulation and feeding nitrogen carry out condensation reaction; React after 8 hours cooling naturally, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene; Prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend, and wherein polyethylene glycol graft modification polypropylene mass percent is 15%, and the polypropylene mass percent is 85%; Blend is added melt spinning machine under 220 ℃ of conditions, carry out the fusion drawn spinning; Make and contain polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material; Prepared modified polypropene hollow-fibre membrane surface water contact angle is 66 °, and pure water flux is 880kg/m under the test pressure of 0.1MPa
2H.
Embodiment 5:
With 1 part of molecular weight is that 10000 low-density its chlorinated polypropylene wax carries out fusion under 180 ℃ of hot conditions; In reactor, add 1 part of molecular weight again and be 1600 polyethylene glycol and 0.001 part nitric acid; Insulation and feeding nitrogen carry out condensation reaction; React after 12 hours cooling naturally, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene; Prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend, and wherein polyethylene glycol graft modification polypropylene mass percent is 20%, and the polypropylene mass percent is 80%; Blend is added melt spinning machine under 200 ℃ of conditions, carry out the fusion drawn spinning; Make and contain polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material; Prepared modified polypropene hollow-fibre membrane surface water contact angle is 60 °, and pure water flux is 1380kg/m under the test pressure of 0.1MPa
2H.
Embodiment 6:
With 1 part of molecular weight is that 8000 high density its chlorinated polypropylene wax carries out fusion under 180 ℃ of hot conditions; In reactor, add 1 part of molecular weight again and be 1600 polyethylene glycol and 0.005 part phosphoric acid; Insulation and feeding nitrogen carry out condensation reaction; React after 8 hours cooling naturally, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene; Prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend, and wherein polyethylene glycol graft modification polypropylene mass percent is 30%, and the polypropylene mass percent is 70%; Blend is added melt spinning machine under 220 ℃ of conditions, carry out the fusion drawn spinning; Make and contain polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material; Prepared modified polypropene hollow-fibre membrane surface water contact angle is 56 °, and pure water flux is 1880kg/m under the test pressure of 0.1MPa
2H.
Embodiment 7:
With 1 part of molecular weight is that 10000 high density its chlorinated polypropylene wax carries out fusion under 180 ℃ of hot conditions; In reactor, add 1 part of molecular weight again and be 2000 polyethylene glycol and 0.005 part benzoic acid; Insulation and feeding nitrogen carry out condensation reaction; React after 12 hours cooling naturally, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene; Prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend, and wherein polyethylene glycol graft modification polypropylene mass percent is 30%, and the polypropylene mass percent is 70%; Blend is added melt spinning machine under 200 ℃ of conditions, carry out the fusion drawn spinning; Make and contain polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material; Prepared modified polypropene hollow-fibre membrane surface water contact angle is 52 °, and pure water flux is 2600kg/m under the test pressure of 0.1MPa
2H.
Embodiment 8:
With 1 part of molecular weight is that 10000 high density its chlorinated polypropylene wax carries out fusion under 200 ℃ of hot conditions; In reactor, add 0.6 part of molecular weight again and be 1200 polyethylene glycol and 0.01 part citric acid; Insulation and feeding nitrogen carry out condensation reaction; React after 12 hours cooling naturally, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene; Prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend, and wherein polyethylene glycol graft modification polypropylene mass percent is 25%, and the polypropylene mass percent is 75%; Blend is added melt spinning machine under 210 ℃ of conditions, carry out the fusion drawn spinning; Make and contain polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material; Prepared modified polypropene hollow-fibre membrane surface water contact angle is 60 °, and pure water flux is 1600kg/m under the test pressure of 0.1MPa
2H.
Embodiment 9:
With 1 part of molecular weight is that 6000 high density its chlorinated polypropylene wax carries out fusion under 180 ℃ of hot conditions; In reactor, add 0.8 part of molecular weight again and be 1200 polyethylene glycol and 0.008 part phosphoric acid; Insulation and feeding nitrogen carry out condensation reaction; React after 10 hours cooling naturally, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene; Prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend, and wherein polyethylene glycol graft modification polypropylene mass percent is 15%, and the polypropylene mass percent is 85%; Blend is added melt spinning machine under 200 ℃ of conditions, carry out the fusion drawn spinning; Make and contain polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material; Prepared modified polypropene hollow-fibre membrane surface water contact angle is 68 °, and pure water flux is 980kg/m under the test pressure of 0.1MPa
2H.
Embodiment 10:
With 1 part of molecular weight is that 7000 high density its chlorinated polypropylene wax carries out fusion under 160 ℃ of hot conditions; In reactor, add 0.7 part of molecular weight again and be 1600 polyethylene glycol and 0.002 part nitric acid; Insulation and feeding nitrogen carry out condensation reaction; React after 9 hours cooling naturally, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene; Prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend, and wherein polyethylene glycol graft modification polypropylene mass percent is 25%, and the polypropylene mass percent is 75%; Blend is added melt spinning machine under 200 ℃ of conditions, carry out the fusion drawn spinning; Make and contain polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane material; Prepared modified polypropene hollow-fibre membrane surface water contact angle is 66 °, and pure water flux is 930kg/m under the test pressure of 0.1MPa
2H.
Claims (4)
1. the preparation method of an efficient hydrophilic modifying polypropylene hollow fiber membrane may further comprise the steps:
(1) the polyethylene glycol graft modification polypropylene is synthetic: under hot conditions with the fusion of its chlorinated polypropylene wax; In its chlorinated polypropylene wax melt, add polyethylene glycol again; Add the small amount of acid catalyst simultaneously, fusion under 120～200 ℃ of hot conditions behind the feeding nitrogen, and carry out condensation reaction; Wherein the quality of polyethylene glycol is 40～80% of an its chlorinated polypropylene wax amount; The quality of acid catalyst is 0.1～1% of an its chlorinated polypropylene wax amount, reacts after 4～12 hours, reactant is poured into to precipitate in the water obtain the polyethylene glycol graft modification polypropylene;
(2) blend melt spinning: prepared polyethylene glycol graft modification polypropylene and polypropylene are carried out blend; Blend adds in the general high-temperature fusion spinning-drawing machine; Under 200～220 ℃ of conditions, carry out the fusion drawn spinning; Make polyethylene glycol hydrophilic modifying polypropylene hollow fiber membrane, wherein polyethylene glycol graft modification polypropylene mass percent is 5～30% in the blend, and the polypropylene mass percent is 95～70%; To guarantee carrying out smoothly of melt spinning, spinning solution is satisfied to be higher than critical concentration and to be lower than limiting viscosity.
2. the preparation method of a kind of efficient hydrophilic modifying polypropylene hollow fiber membrane according to claim 1, described its chlorinated polypropylene wax is any in low-density its chlorinated polypropylene wax and the high density its chlorinated polypropylene wax, its molecular weight is 2000～10000.
3. the preparation method of a kind of efficient hydrophilic modifying polypropylene hollow fiber membrane according to claim 1, described acid catalyst is any in nitric acid, phosphoric acid, benzoic acid and the citric acid.
4. the preparation method of a kind of efficient hydrophilic modifying polypropylene hollow fiber membrane according to claim 1, the molecular weight of described polyethylene glycol is 400～2000.
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| CN103768958B (en) * | 2012-10-19 | 2015-09-16 | 中国石油化工股份有限公司 | A kind of hydrophilic polypropylene hollow fiber microporous membrane and preparation method thereof |
| CN103933880B (en) * | 2014-03-24 | 2016-03-09 | 贵州省材料产业技术研究院 | The preparation method of high-throughout hydrophilic modification polypropylene hollow fiber membrane |
| CN108660616B (en) * | 2018-05-29 | 2020-06-26 | 中原工学院 | Horizontal branch reinforced bionic tree-shaped non-woven composite material and preparation method thereof |
| CN108677386B (en) * | 2018-05-29 | 2020-07-17 | 中原工学院 | Asymmetric transmission non-woven composite material and preparation method thereof |
| CN108677384B (en) * | 2018-05-29 | 2020-06-26 | 中原工学院 | Melt-blown non-woven composite material with horizontal branch structure and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101036861A (en) * | 2006-12-29 | 2007-09-19 | 浙江大学 | Hydrophilicity polyethylene hollow fiber micro-hole film and the preparation method |
| CN101721928A (en) * | 2010-01-14 | 2010-06-09 | 郑州大学 | High-strength and hydrophilic polysulfone hollow fiber ultrafiltration membrane |
| CN101829507A (en) * | 2010-05-14 | 2010-09-15 | 苏州市新能膜材料科技有限公司 | Method for preparing polypropylene separation membrane with durable hydrophilic property |
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| KR100543968B1 (en) * | 2003-02-28 | 2006-01-23 | 주식회사 케이엠에스 | Preparation of asymmetric polyethylene hollow fiber membrane having high strength |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101036861A (en) * | 2006-12-29 | 2007-09-19 | 浙江大学 | Hydrophilicity polyethylene hollow fiber micro-hole film and the preparation method |
| CN101721928A (en) * | 2010-01-14 | 2010-06-09 | 郑州大学 | High-strength and hydrophilic polysulfone hollow fiber ultrafiltration membrane |
| CN101829507A (en) * | 2010-05-14 | 2010-09-15 | 苏州市新能膜材料科技有限公司 | Method for preparing polypropylene separation membrane with durable hydrophilic property |
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