CN103044822A - PVDF/PVA/TiO2 composite membrane - Google Patents
PVDF/PVA/TiO2 composite membrane Download PDFInfo
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- CN103044822A CN103044822A CN2012105458962A CN201210545896A CN103044822A CN 103044822 A CN103044822 A CN 103044822A CN 2012105458962 A CN2012105458962 A CN 2012105458962A CN 201210545896 A CN201210545896 A CN 201210545896A CN 103044822 A CN103044822 A CN 103044822A
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- pva
- pvdf
- tio
- composite membrane
- membrane
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Abstract
The invention discloses a PVDF (Polyvinylidene Fluoride)/PVA (Polyvinyl Acetate)/TiO2 composite membrane. PVA, PVDF and TiO2 are blended together to form the membrane, the mechanical strength and the ageing resistance of the membrane are increased, the membrane has good stain resistance, flame resistance, low smokiness and particularly ageing resistance under ultraviolet radiation, and the aging of the membrane is delayed. The membrane can be used as solar cell back-membrane with a good performance and can resist severe environments such as wind, sand, hailstones and the like.
Description
Technical field
The present invention relates to the intermingling material field, be specifically related to a kind of PVDF/PVA/TiO
2Composite 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.
TiO
2Be commonly called as titanium dioxide; a kind of nontoxic white solid or pulverous material; has high refractive index; light there is very strong dispersion effect, the energy Ultraviolet radiation absorbing, being used for polymkeric substance can shield; cloudy only its photodegradation; and can be steady in a long-term, can improve the ageing resistance of material, increase the service life.
Summary of the invention
The present invention adopts PVDF, PVA, TiO
2Adopt the casting method blend to prepare PVDF/PVA/TiO
2Composite 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) TiO that takes by weighing
2Powder 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, TiO
2The add-on of powder accounts for 3～5% of total mass, and the amount of coupling agent is TiO
230% of powder quality.
Wherein, coupling agent is silane coupling agent, and general formula is RSiX
3, R represents amino, sulfydryl, vinyl, epoxy group(ing) etc. in the formula, the alkoxyl group that the X representative can be hydrolyzed.
Positively effect of the present invention is: PVA, PVDF and TiO
2After the blend film forming, increased the physical strength of film, 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/TiO of embodiment
2Composite membrane
Take by weighing 8g PVDF, 2g PVA is dissolved among the 38g DMSO, and 80 ℃ are stirred 8h, mix.Take by weighing 1.5g TiO
2Powder, the 0.5g Silane coupling agent KH550 mixes rear film forming.The water flux of gained film is composite membrane 2789L/m
2H, porosity 85.6%.
2 one kinds of PVDF/PVA/TiO of embodiment
2
Take by weighing 7g PVDF, 3g PVA is dissolved among the 38g DMSO, and 80 ℃ are stirred 8h, mix.Take by weighing 2g TiO
2Powder, 0.6g silane coupling agent KH560 mixes rear film forming.The water flux of gained film is 2800L/m
2H, porosity 90.6%.
3 one kinds of PVDF/PVA/TiO of embodiment
2Composite membrane
Take by weighing 6g PVDF, 4g PVA is dissolved among the 38g DMSO, and 80 ℃ are stirred 8h, mix.Take by weighing 1.5g TiO
2Powder, 0.5g silane coupling agent KH570 mixes rear film forming.The water flux of gained film is 2825L/m
2H, porosity 88.6%.
Claims (5)
1.PVDF/PVA/TiO
2Composite membrane is characterized in that: described composite membrane is PVDF, PVA, TiO
2The blend preparation.
2. PVDF/PVA/TiO according to claim 1
2Composite membrane 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) TiO that takes by weighing
2Powder 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/TiO according to claim 1
2Composite membrane 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/TiO according to claim 1
2Composite membrane is characterized in that: TiO
2The add-on of powder accounts for 3～5% of total mass, and the amount of coupling agent is TiO
230% of powder quality.
5. PVDF/PVA/TiO according to claim 1
2Composite membrane is characterized in that: described coupling agent is silane coupling agent, and general formula is RSiX
3, R represents amino, sulfydryl, vinyl, epoxy group(ing) etc. in the formula, the alkoxyl group that the X representative can be hydrolyzed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105458962A CN103044822A (en) | 2012-12-17 | 2012-12-17 | PVDF/PVA/TiO2 composite membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105458962A CN103044822A (en) | 2012-12-17 | 2012-12-17 | PVDF/PVA/TiO2 composite membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103044822A true CN103044822A (en) | 2013-04-17 |
Family
ID=48057695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105458962A Pending CN103044822A (en) | 2012-12-17 | 2012-12-17 | PVDF/PVA/TiO2 composite membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103044822A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489940A (en) * | 2015-08-31 | 2016-04-13 | 哈尔滨理工大学 | Method for simply and conveniently preparing polymer electrolyte film for lithium-ion battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147848A (en) * | 2007-07-20 | 2008-03-26 | 天津工业大学 | Polyvinylidene fluoride film hydrophilically modified method |
| CN101164679A (en) * | 2007-08-10 | 2008-04-23 | 哈尔滨工业大学 | Polyvinylidene fluoride nanometer composite super low pressure ultrafiltering membrane and preparation method thereof |
-
2012
- 2012-12-17 CN CN2012105458962A patent/CN103044822A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147848A (en) * | 2007-07-20 | 2008-03-26 | 天津工业大学 | Polyvinylidene fluoride film hydrophilically modified method |
| CN101164679A (en) * | 2007-08-10 | 2008-04-23 | 哈尔滨工业大学 | Polyvinylidene fluoride nanometer composite super low pressure ultrafiltering membrane and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张彪等: ""无机粒子改性聚偏氟乙烯膜的研究进展"", 《材料导报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489940A (en) * | 2015-08-31 | 2016-04-13 | 哈尔滨理工大学 | Method for simply and conveniently preparing polymer electrolyte film for lithium-ion battery |
| CN105489940B (en) * | 2015-08-31 | 2018-05-15 | 哈尔滨理工大学 | A kind of method that simplicity prepares lithium ionic cell polymer electrolyte film |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130417 |