CN103657452A - Hollow fiber membrane formed by coating corn polylactic onto corn fibermesh tube and preparation method of hollow fiber membrane - Google Patents
Hollow fiber membrane formed by coating corn polylactic onto corn fibermesh tube and preparation method of hollow fiber membrane Download PDFInfo
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- CN103657452A CN103657452A CN201410000423.3A CN201410000423A CN103657452A CN 103657452 A CN103657452 A CN 103657452A CN 201410000423 A CN201410000423 A CN 201410000423A CN 103657452 A CN103657452 A CN 103657452A
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Abstract
The invention discloses a hollow fiber membrane formed by coating corn polylactic onto a corn fibermesh tube. The hollow fiber membrane comprises a membrane layer and a hollow fiber tube and is characterized in that the membrane layer is formed by corn polylactic and the hollow fiber tube is formed by corn fibers. The invention also comprises a preparation method for the hollow fiber membrane formed by coating the corn polylactic onto the corn fibermesh tube. The hollow fiber membrane can be used for researching various high-function ultrafiltration membranes, nanofiltration membranes, microfiltration membranes, gas separation membranes and the like. Compared with the prior art, the hollow fiber membrane has the advantages that the corn fibers are woven into a woven tube by a tube knitting machine, and then corn polylactic coating liquid is coated on the surface of the woven tube; as the woven tube and the coating layer are approximate in material, the hollow fiber membrane is very good in pasting firmness without stripping and can be used for high-pressure backwashing.
Description
Technical field
The present invention relates to film separation field, particularly a kind of zein fiber webmaster applies hollow-fibre membrane of corn PLA and preparation method thereof.
Background technology
Hollow-fibre membrane is widely used in filtration or the dialysis in the various fields such as processing, drink water purifying, middle water reuse, food processing and biological medicine of industry and municipal wastewater.In use mainly there is following problem in hollow-fibre membrane at present: (1) intensity is low, easily fracture of wire; (2) be difficult for degraded, easily cause environmental pollution; (3) antibiotic property is poor, and the easy growth bacterium of face easily pollutes, not easy cleaning; (4) raw material is petroleum chemicals, is difficult for regeneration; (5) the general compound hollow membrane of fiber webmaster can not backwash, easily de-pellicle skin.
< < zein fiber > > in < < Guangxi textile technology > > (the 36th the 1st phase of volume in 2007) has introduced with the spinning of corn polymer and has manufactured zein fiber, it has good antibiotic property, water imbibition (hydrophily) and high strength, is a kind of environment-friendly materials that have development prospect.U.S. HANZSCH BERND etc. on August 21st, 2003 disclosed US Patent No. 2003158260 reported that a kind of fermentation starch based agricultural product (corn) make PLA (corn PLA).Chinese biological technical information net has been introduced corn polymer for du pont company (PLA) the new fabric of weaving and has been appeared on the market on September 12nd, 2004, and corn polymer derives from corn, and safety and environmental protection is conducive to resource regeneration.Chinese invention patent ZL 201010209047.0 has introduced a kind of manufacture method of fiber yarn enhancement composite hollow fiber membrane, greatly improves the intensity of film silk.At present, zein fiber is also rarely had to report for the preparation of hollow-fibre membrane.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of hollow-fibre membrane and manufacture method thereof that applies corn PLA by preparing zein fiber webmaster, in order to solving the easy fracture of wire of film, easily pollute, difficultly clean, easily demoulding skin and environmental pollution, non-renewable problem.
For achieving the above object, technical scheme provided by the present invention is: a kind of zein fiber webmaster applies the hollow-fibre membrane of corn PLA, comprise rete and hollow fiber conduit, it is characterized in that: described rete material is corn PLA, described hollow fiber conduit material is zein fiber.
The present invention also comprises that above-mentioned zein fiber webmaster applies the preparation method of the hollow-fibre membrane of corn PLA, comprise coating liquid, hollow fiber conduit, described coating liquid comprises film forming polymer, pore former, pore-creating agent, it is characterized in that: described film forming polymer is corn PLA, described hollow fiber conduit is zein fiber; Also comprise the steps: zein fiber to be woven into hollow fiber conduit, then on hollow fiber conduit, apply coating liquid, obtain hollow-fibre membrane.
Preferably, described pore former is inorganic pore former or organic polymer pore former or is the mixture of the two.
Preferably, described inorganic pore former is following one or more mixture: lithium chloride, lithium nitrate, sodium chloride, calcium chloride, calcium nitrate, titanium dioxide, silica, alundum (Al2O3) etc.
Further, described organic polymer pore former is following one or more mixture: the high molecular weight water soluble polymers such as polyethylene glycol, ethyl cellulose, polyvinylpyrrolidone, polyvinyl alcohol.
Further, the preferred intensive polar solvent of described pore-creating agent, can think the mixture of following one or more solvents: dimethyl formamide, dimethylacetylamide, 1-METHYLPYRROLIDONE, trichloroethanes, acetone or toluene etc.
Adopt technique scheme, zein fiber webmaster of the present invention applies hollow-fibre membrane of corn PLA and preparation method thereof, can be for developing various high function milipore filters, NF membrane, microfiltration membranes and gas separation membrane etc., compared with prior art, beneficial effect of the present invention is as follows:
1) one of to adopt corn PLA be main material, and raw material sources are abundant and renewable, and have biodegradability, environmentally friendly;
2) corn PLA has good hydrophily, can improve water flux and the stain resistance of product;
3) corn PLA also has antibiotic property, can avoid bacterium in the growth on film surface, has also just improved the pollution resistance of product and easy cleaning more, keeps more stable water flux;
4), by the adjustment with different polymer or different proportion, can produce relatively easily and be applicable to the different various performance products that require;
5) material due to its woven tube and film layer is close, thus its to paste fastness very good, can demoulding skin, can high pressure backwash.
The specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Embodiment 1: by 3.5 kilograms of dimethylacetylamides, 0.8 kilogram of corn PLA, 0.5 kilogram of polyethylene glycol, 200 grams of lithium nitrates, heating stirring and dissolving is even, make the coating liquid of corn PLA, then this coating liquid is coated in to the zein fiber with 32, with compiling pipe machine, be spun into internal diameter 1.2mm, the woven tube extexine of external diameter 2.0mm, through coagulating bath water tank (coagulating agent is pure water), solvent in coating liquid is (containing pore former, pore-creating agent) be dissolved in solidification liquid, corn PLA precipitation sticks to woven tube surface filming, make the hollow-fibre membrane that zein fiber webmaster applies corn PLA.Obtain external diameter 2.5mm, internal diameter 1.2mm, porosity is 68%, and the separated aperture of film is 0.1 micron, and at 0.1MPa, under the test condition of 25 ℃, pure water water-flowing amount is 1320L/m2*hr, can the 0.32MPa of resistance to backwash pressure.
Embodiment 2: by 3.5 kilograms of dimethylacetylamides, 1.0 kilograms of corn PLAs, 0.35 kilogram of polyethylene glycol, 150 grams of lithium nitrates, heating stirring and dissolving is even, make the coating liquid of corn PLA, then this coating liquid is coated in the zein fiber of 32 and is spun into internal diameter 1.2mm with compiling pipe machine, the woven tube extexine of external diameter 2.0mm, through coagulating bath water tank (coagulating agent is pure water), solvent in coating liquid is (containing pore former, pore-creating agent) be dissolved in solidification liquid, corn PLA precipitation sticks to woven tube surface filming, make the hollow-fibre membrane that zein fiber webmaster applies corn PLA.External diameter 2.5mm, internal diameter 1.2mm, porosity is 63%, and the separated aperture of film is 0.05 micron, and at 0.1MPa, under the test condition of 25 ℃, pure water water-flowing amount is 1020L/m2*hr, can the 0.35MPa of resistance to backwash pressure.
Embodiment 3: by 3.7 kilograms of dimethylacetylamides, 0.7 kilogram of corn PLA, 0.45 kilogram of polyethylene glycol, 150 grams of lithium nitrates, heating stirring and dissolving is even, make the coating liquid of corn PLA, then this coating liquid is coated in the zein fiber of 32 and is spun into internal diameter 1.2mm with compiling pipe machine, the woven tube extexine of external diameter 2.0mm, through coagulating bath water tank (coagulating agent is pure water), solvent in coating liquid is (containing pore former, pore-creating agent) be dissolved in solidification liquid, corn PLA precipitation sticks to woven tube surface filming, make the hollow-fibre membrane that zein fiber webmaster applies corn PLA.External diameter 2.5mm, internal diameter 1.2mm, porosity is 73%, and the separated aperture of film is 0.12 micron, and at 0.1MPa, under the test condition of 25 ℃, pure water water-flowing amount is 1620L/m2*hr, can the 0.30MPa of resistance to backwash pressure.
It should be noted that, the core of innovative point of the present invention is that hollow fiber conduit adopts zein fiber, film forming polymer adopts corn PLA, and the preparation method of pore former, pore-creating agent and hollow-fibre membrane is this area common technology, to be only polyethylene glycol show as pore-creating agent as inorganic pore former, dimethylacetylamide and introduced the present invention as pore former, lithium nitrate the above embodiments, those skilled in the art can select corresponding pore former, pore-creating agent etc. as required, prepare the hollow-fibre membrane of PSPP.And those skilled in the art should be understood that within not departing from the spirit and scope of the present invention that appended claims limits, and in the form and details the present invention is made a variety of changes, and is protection scope of the present invention.
Claims (7)
1. zein fiber webmaster applies a hollow-fibre membrane for corn PLA, comprises rete and hollow fiber conduit, it is characterized in that: described rete material is corn PLA, and described hollow fiber conduit material is zein fiber.
2. a zein fiber webmaster applies the preparation method of the hollow-fibre membrane of corn PLA, comprise coating liquid, hollow fiber conduit, described coating liquid comprises film forming polymer, pore former, pore-creating agent, it is characterized in that: described film forming polymer is corn PLA, described hollow fiber conduit is zein fiber; Also comprise the steps: zein fiber to be woven into hollow fiber conduit, then on hollow fiber conduit, apply coating liquid, obtain hollow-fibre membrane.
3. a kind of zein fiber webmaster according to claim 2 applies the preparation method of the hollow-fibre membrane of corn PLA, it is characterized in that: described pore former is inorganic pore former or organic polymer pore former or is the mixture of the two.
4. a kind of zein fiber webmaster according to claim 2 applies the preparation method of the hollow-fibre membrane of corn PLA, it is characterized in that: described inorganic pore former is following one or more mixture: lithium chloride, lithium nitrate, sodium chloride, calcium chloride, calcium nitrate, titanium dioxide, silica or alundum (Al2O3).
5. a kind of zein fiber webmaster according to claim 2 applies the preparation method of the hollow-fibre membrane of corn PLA, it is characterized in that: described organic polymer pore former is following one or more mixture: polyethylene glycol, ethyl cellulose, polyvinylpyrrolidone or polyvinyl alcohol.
6. a kind of zein fiber webmaster according to claim 2 applies the preparation method of the hollow-fibre membrane of corn PLA, it is characterized in that: described pore-creating agent is intensive polar solvent.
7. a kind of zein fiber webmaster according to claim 6 applies the preparation method of the hollow-fibre membrane of corn PLA, it is characterized in that: the mixture that described intensive polar solvent is following one or more solvents: dimethyl formamide, dimethylacetylamide, 1-METHYLPYRROLIDONE, trichloroethanes or acetone or toluene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410000423.3A CN103657452A (en) | 2014-01-02 | 2014-01-02 | Hollow fiber membrane formed by coating corn polylactic onto corn fibermesh tube and preparation method of hollow fiber membrane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410000423.3A CN103657452A (en) | 2014-01-02 | 2014-01-02 | Hollow fiber membrane formed by coating corn polylactic onto corn fibermesh tube and preparation method of hollow fiber membrane |
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| CN103657452A true CN103657452A (en) | 2014-03-26 |
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| CN201410000423.3A Pending CN103657452A (en) | 2014-01-02 | 2014-01-02 | Hollow fiber membrane formed by coating corn polylactic onto corn fibermesh tube and preparation method of hollow fiber membrane |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345313A (en) * | 2016-09-19 | 2017-01-25 | 江苏海纳空调净化设备有限公司 | Environment-friendly filter membrane |
| CN106345312A (en) * | 2016-09-19 | 2017-01-25 | 江苏海纳空调净化设备有限公司 | Air filtering film |
| CN107602926A (en) * | 2017-09-25 | 2018-01-19 | 常州苏通海平机电科技有限公司 | A kind of preparation method of corn cob fiber element film |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102580553A (en) * | 2012-03-30 | 2012-07-18 | 厦门绿邦膜技术有限公司 | Method for manufacturing environmental-friendly hollow-fibre membrane |
| CN202983528U (en) * | 2012-10-30 | 2013-06-12 | 厦门绿邦膜技术有限公司 | Filter membrane with ultrafine fiber braided tube and production machine thereof |
-
2014
- 2014-01-02 CN CN201410000423.3A patent/CN103657452A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580553A (en) * | 2012-03-30 | 2012-07-18 | 厦门绿邦膜技术有限公司 | Method for manufacturing environmental-friendly hollow-fibre membrane |
| CN202983528U (en) * | 2012-10-30 | 2013-06-12 | 厦门绿邦膜技术有限公司 | Filter membrane with ultrafine fiber braided tube and production machine thereof |
Non-Patent Citations (1)
| Title |
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| 白倩倩等: "增强型中空纤维膜界面结合状态的研究", 《高分子学报》, no. 12, 31 December 2013 (2013-12-31), pages 1545 - 1551 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345313A (en) * | 2016-09-19 | 2017-01-25 | 江苏海纳空调净化设备有限公司 | Environment-friendly filter membrane |
| CN106345312A (en) * | 2016-09-19 | 2017-01-25 | 江苏海纳空调净化设备有限公司 | Air filtering film |
| CN107602926A (en) * | 2017-09-25 | 2018-01-19 | 常州苏通海平机电科技有限公司 | A kind of preparation method of corn cob fiber element film |
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Application publication date: 20140326 |