CN103013003A - PVDF (Polyvinylidene Fluoride)/PVA (Poly Vinyl Alcohol)/CS (Carbon Steel) composite membrane - Google Patents
PVDF (Polyvinylidene Fluoride)/PVA (Poly Vinyl Alcohol)/CS (Carbon Steel) composite membrane Download PDFInfo
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- CN103013003A CN103013003A CN2012105485870A CN201210548587A CN103013003A CN 103013003 A CN103013003 A CN 103013003A CN 2012105485870 A CN2012105485870 A CN 2012105485870A CN 201210548587 A CN201210548587 A CN 201210548587A CN 103013003 A CN103013003 A CN 103013003A
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Abstract
The invention discloses a PVDF (Polyvinylidene Fluoride)/PVA (Poly Vinyl Alcohol)/CS (Carbon Steel) composite membrane. The PVDF/PVA/CS composite membrane is a PVA, PVDF and CS blended membrane, so that the mechanical strength and the ageing resistance of the membrane are improved, the stain resistance is good, and the membrane has flame retardance and low smokiness, particularly ageing resistance under ultraviolet radiation, so that the ageing of the membrane is delayed. The composite membrane can be taken as a solar cell back membrane with excellent performance, and can resist severe environments such as sand wind and hail.
Description
Technical field
The present invention relates to the intermingling material field, be specifically related to a kind of PVDF/PVA/CS composite membrane.
Background technology
PVDF (polyvinyl alcohol, Polyvinylidene Fluoride) is the homopolymer of vinylidene, and molecular formula is-[CF
2-CH
2]
n-.The weathering resistance of PVDF is fabulous, and is low to majority of gas and liquid infiltration power, but and uvioresistant and nuclear radiation, heat-resisting, corrosion-resistant, anti-aging, physical strength is high, good processability, long service life.But its heat conductivility is poor, and melt viscosity is high.
PVA (polyvinyl alcohol, Polyvinyl Alcohol), molecular formula is-[CH
2-CHOH]
n-.PVA is a kind of water miscible polyhydroxylated polymer.PVA is nonpoisonous and tasteless, is white in color cotton-shaped or chip solid, has very high physical strength, good crystallinity, light transmission, thermostability and chemical stability.
(chitosan chitosan) is a kind of natural alkaline polysaccharide to CS, and aboundresources can become silk or film, is a kind of white or faint yellow amorphous solid, dissolves in mineral acid and most of organic acids such as dilute hydrochloric acid, nitric acid.Chitosan can be improved physicochemical property by chemical modification, can also be combined with many kinds of substance, has no side effect, and good biocompatibility is arranged.
Summary of the invention
The present invention adopts PVDF, PVA, CS to adopt the casting method blend to prepare the PVDF/PVA/CS composite membrane.
The preparation process of described composite membrane is:
(1) preparation of PVDF/PVA mixed sols: take by weighing PVDF, PVA in DMSO, 78 ± 2 ℃ are stirred 8h, mix.
(2) the CS powder that takes by weighing adds coupling agent, prepares with the PVDF/PVA of different mass ratio, stirs, and puts into ultrasonic vibrating dispersion, then an amount of mixed solution is injected the casting film dish, uses the doctor blade film forming.
Wherein: PVDF/PVA accounts for 20% of total mass, and the mass ratio of PVDF, PVA is 8: 2 or 7: 3 or 6: 4.
Wherein, the add-on of CS powder accounts for 3～5% of total mass, and the amount of coupling agent is 30% of CS powder quality.
Wherein, described coupling agent is the phosphoric acid ester coupling agent.
Positively effect of the present invention is: after PVA, PVDF and the CS blend film forming, increased the physical strength of film, and ageing resistance, well contamination resistance has the ageing resistance under fire-retardant and low cigarette, the especially uv-radiation, has delayed the aging of film.Can be used as the solar battery back film of excellent performance, can resist the severe environment such as dust storm, hail.
Embodiment
Describe technical scheme of the present invention in detail below in conjunction with embodiment, but protection domain is not so limited.
1 one kinds of PVDF/PVA/CS composite membranes of embodiment
Take by weighing 8g PVDF, 2g PVA is dissolved among the 38g DMSO, and 80 ℃ are stirred 8h, mix.Take by weighing the 1.5gCS powder, 0.5g phosphoric acid ester ester class coupling agent mixes rear film forming.The water flux of gained film is composite membrane 2889L/m
2H, porosity 87.6%.
2 one kinds of PVDF/PVA/CS of embodiment
Take by weighing 7g PVDF, 3g PVA is dissolved among the 38g DMSO, and 80 ℃ are stirred 8h, mix.Take by weighing the 2gCS powder, 0.6g phosphoric acid ester coupling agent mixes rear film forming.The water flux of gained film is 2900L/m
2H, porosity 91.6%.
3 one kinds of PVDF/PVA/CS composite membranes of embodiment
Take by weighing 6g PVDF, 4g PVA is dissolved among the 38g DMSO, and 80 ℃ are stirred 8h, mix.Take by weighing the 1.5gCS powder, 0.5g phosphoric acid ester coupling agent mixes rear film forming.The water flux of gained film is 2855L/m
2H, porosity 85.6%.
Claims (5)
1.PVDF/PVA/CS composite membrane is characterized in that: described composite membrane is PVDF, PVA, CS blend preparation.
2. PVDF/PVA/CS composite membrane according to claim 1, it is characterized in that: the preparation process of described composite membrane is:
(1) preparation of PVDF/PVA mixed sols: take by weighing PVDF, PVA in DMSO, 78 ± 2 ℃ are stirred 8h, mix.
(2) the CS powder that takes by weighing adds coupling agent, prepares with the PVDF/PVA of different mass ratio, stirs, and puts into ultrasonic vibrating dispersion, then an amount of mixed solution is injected the casting film dish, uses the doctor blade film forming.
3. PVDF/PVA/CS composite membrane according to claim 1, it is characterized in that: PVDF/PVA accounts for 20% of total mass, and the mass ratio of PVDF, PVA is 8: 2 or 7: 3 or 6: 4.
4. PVDF/PVA/CS composite membrane according to claim 1, it is characterized in that: the add-on of CS powder accounts for 3～5% of total mass, and the amount of coupling agent is 30% of CS powder quality.
5. PVDF/PVA/CS composite membrane according to claim 1, it is characterized in that: described coupling agent is the phosphoric acid ester coupling agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105485870A CN103013003A (en) | 2012-12-18 | 2012-12-18 | PVDF (Polyvinylidene Fluoride)/PVA (Poly Vinyl Alcohol)/CS (Carbon Steel) composite membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105485870A CN103013003A (en) | 2012-12-18 | 2012-12-18 | PVDF (Polyvinylidene Fluoride)/PVA (Poly Vinyl Alcohol)/CS (Carbon Steel) composite membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103013003A true CN103013003A (en) | 2013-04-03 |
Family
ID=47962136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105485870A Pending CN103013003A (en) | 2012-12-18 | 2012-12-18 | PVDF (Polyvinylidene Fluoride)/PVA (Poly Vinyl Alcohol)/CS (Carbon Steel) composite membrane |
Country Status (1)
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| CN (1) | CN103013003A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1776996A1 (en) * | 2004-06-28 | 2007-04-25 | Kureha Corporation | Porous membrane for water treatment and process for producing the same |
| CN101147848A (en) * | 2007-07-20 | 2008-03-26 | 天津工业大学 | Polyvinylidene fluoride film hydrophilically modified method |
| CN102266728A (en) * | 2011-07-05 | 2011-12-07 | 惠州七芯膜净化环保有限公司 | Polyvinylidene fluoride hollow fiber membrane and preparation method thereof |
| CN102764598A (en) * | 2012-07-17 | 2012-11-07 | 西安建筑科技大学 | Preparation method of molecular engram composite film for separating tryptophane isomer |
-
2012
- 2012-12-18 CN CN2012105485870A patent/CN103013003A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1776996A1 (en) * | 2004-06-28 | 2007-04-25 | Kureha Corporation | Porous membrane for water treatment and process for producing the same |
| CN101147848A (en) * | 2007-07-20 | 2008-03-26 | 天津工业大学 | Polyvinylidene fluoride film hydrophilically modified method |
| CN102266728A (en) * | 2011-07-05 | 2011-12-07 | 惠州七芯膜净化环保有限公司 | Polyvinylidene fluoride hollow fiber membrane and preparation method thereof |
| CN102764598A (en) * | 2012-07-17 | 2012-11-07 | 西安建筑科技大学 | Preparation method of molecular engram composite film for separating tryptophane isomer |
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Application publication date: 20130403 |