JP2014166632A - 高分子多孔質膜 - Google Patents
高分子多孔質膜 Download PDFInfo
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- JP2014166632A JP2014166632A JP2014078827A JP2014078827A JP2014166632A JP 2014166632 A JP2014166632 A JP 2014166632A JP 2014078827 A JP2014078827 A JP 2014078827A JP 2014078827 A JP2014078827 A JP 2014078827A JP 2014166632 A JP2014166632 A JP 2014166632A
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- Prior art keywords
- copolymer
- tetrafluoroethylene
- solvent
- polymer
- membrane
- Prior art date
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- 239000012528 membrane Substances 0.000 claims abstract description 143
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000000034 method Methods 0.000 claims abstract description 69
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical group OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 claims abstract description 54
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- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000012510 hollow fiber Substances 0.000 claims abstract description 33
- 238000005191 phase separation Methods 0.000 claims abstract description 27
- 238000002145 thermally induced phase separation Methods 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims description 90
- 230000035699 permeability Effects 0.000 abstract description 33
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- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 11
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 7
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- 238000002835 absorbance Methods 0.000 description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 6
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- 238000003786 synthesis reaction Methods 0.000 description 6
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 5
- 239000005977 Ethylene Substances 0.000 description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 5
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
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- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 4
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- 239000007864 aqueous solution Substances 0.000 description 4
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 4
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- 238000010528 free radical solution polymerization reaction Methods 0.000 description 4
- 238000005227 gel permeation chromatography Methods 0.000 description 4
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 229920013716 polyethylene resin Polymers 0.000 description 4
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- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical group CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
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- 150000001875 compounds Chemical class 0.000 description 3
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- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 2
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Abstract
【解決手段】ビニルアルコール単位及びテトラフルオロエチレン単位を有し、ビニルアルコール単位とテトラフルオロエチレン単位との交互率が30%以上であり、ビニルアルコール単位及びテトラフルオロエチレン単位のモル比(ビニルアルコール単位/テトラフルオロエチレン単位)が25〜75/75〜25である共重合体(A)とフッ化ビニリデン系樹脂からなる高分子多孔質膜。前記高分子多孔質膜は、非溶媒誘起相分離法、熱誘起相分離法、又はそれら両方の組み合わせにより作製されたものであり、中空糸膜であることが好ましい。
【選択図】なし
Description
本発明の高分子多孔質膜は、ビニルアルコール単位(−CH2−CH(OH)−)及びテトラフルオロエチレン単位(−CF2−CF2−)を有し、ビニルアルコール単位とテトラフルオロエチレン単位との交互率が30%以上である共重合体(A)からなる。本発明の高分子多孔質膜は、ビニルアルコール単位とテトラフルオロエチレン単位とが交互に重合している割合が高い共重合体からなるので、透水性及び親水性に優れる。
交互率(%)=C/(A+B+C)×100
A:−V−V−V−のように2つのVと結合したVの個数
B:−V−V−T−のようにVとTとに結合したVの個数
C:−T−V−T−のように2つのTに結合したVの個数
(T:テトラフルオロエチレン単位、V:ビニルアルコール単位)
A、B、CのV単位の数は、1H−NMR測定のビニルアルコール単位(−CH2−CH(OH)−)の3級炭素に結合する主鎖のHの強度比より算出する。
乳化重合において使用する溶媒としては、例えば、水、水とアルコールとの混合溶媒等が挙げられる。
ケン化度(%)=D/(D+E)×100
D:共重合体(A)中のビニルアルコール単位数
E:共重合体(A)中のビニルエステルモノマー単位数
純水透過係数〔m3/m2/Pa/s〕=(透過水量)/(膜面積)/(透過時間)/(評価圧力)
微粒子阻止率(%)=((評価原液吸光度)−(透過液吸光度))/(評価原液吸光度)×100
最大点破断強度は、チャック間距離50mm、引張速度200mm/分の条件下で試験片の破断強度を測定し、引張試験前の断面積を単位測定面積として求めた値である。
最大点伸度は、チャック間距離50mm、引張速度200mm/分の条件下で試験片の破断強度を測定し、チャック間距離50mmを基準にして最大点の伸び率より求められる。
熱誘起相分離法を用いる場合、フルオロポリマー溶液の溶媒としては貧溶媒が好ましいが、この限りではなく、フルオロポリマーの相分離挙動の検討から良溶媒を用いる場合もある。
フルオロポリマー溶液は、共重合体(A)、溶媒及び非溶媒の合計に対して、非溶媒が0.1〜10質量%であることが好ましい。より好ましくは、0.5〜8質量%である。
フルオロポリマー濃度を適正な範囲に調整することにより、フルオロポリマー溶液の粘度を適切な範囲に調整することができる。フルオロポリマー溶液の粘度が適切な範囲になければ、高分子多孔質膜に成形することができないおそれがある。
上記非溶媒としては、熱誘起相分離法で例示した非溶媒を使用することができる。
共重合体(A)以外の樹脂としては上述したものが挙げられる。中でも、上述した熱可塑性樹脂が好ましく、フッ化ビニリデン系樹脂、又は、アクリル樹脂がより好ましい。
溶液の塗布量を制御する方法としては、該溶液の塗布量自体を制御する方法の他に、多孔質膜を該溶液に浸漬したり、多孔質膜に該溶液を塗布した後に、該溶液の一部をかき取ったり、エアナイフを用いて吹き飛ばす方法も好ましく用いられる。
ビニルアルコール単位とテトラフルオロエチレン単位との交互率は、重アセトン溶媒で共重合体の1H−NMR測定(重アセトン溶媒)を行い、以下の式より3連鎖の交互率を算出した。
交互率(%)=C/(A+B+C)×100
A:−V−V−V−のように2つのVと結合したVの個数
B:−V−V−T−のようにVとTとに結合したVの個数
C:−T−V−T−のように2つのTに結合したVの個数
(T:テトラフルオロエチレン単位、V:ビニルアルコール単位)
A、B、CのV単位の数は、1H−NMR測定のビニルアルコール単位(−CH2−CH(OH)−)の3級炭素に結合する主鎖のHの強度比より算出した。
1H−NMR(核磁気共鳴法)測定には、JNM−EX270(JEOL社製:270MHz)を用いた。溶媒は重アセトンを用いた。
純水透過係数は、温度25℃でイオン交換水を、必要に応じてポンプ又は窒素圧で0.01MPa以上に加圧し、作製した中空糸又は平膜でろ過することで求めた。
純水透過係数〔m3/m2/Pa/s〕=(透過水量)/(膜面積)/(透過時間)/(評価圧力)
微粒子阻止率は、粒径が制御されたポリスチレンラテックス微粒子をイオン交換水にて100ppm程度に希釈した分散溶液を評価原液としてろ過し、次式にて求めた。
微粒子阻止率(%)=((評価原液吸光度)−(透過液吸光度))/(評価原液吸光度)×100
最大点破断強度は、チャック間距離50mm、引張速度200mm/分の条件下で試験片の破断強度を測定し、引張試験前の断面積を単位測定面積として求めた。
最大点伸度は、チャック間距離50mm、引張速度200mm/分の条件下で試験片の破断強度を測定し、チャック間距離50mmを基準にして最大点の伸び率より求めた。
アルカリ処理は1N NaOHのメタノール/水(50/50(体積%))の水溶液に中空糸を浸漬させることで行った。
接触角測定(25℃)は協和界面化学(株)のDropMaster701を用いて、純水を測定溶媒として測定した。
(酢酸ビニル/テトラフルオロエチレン共重合体の合成)
3Lステンレス製オートクレーブに純水1000g、酢酸ビニル23.2g、ネオコールP(ジオクチルスルホコハク酸ナトリウムの76.4質量%イソプロピルアルコール溶液:第一工業製薬(株)製)を入れ、窒素置換し、テトラフルオロエチレン37gを加え、槽内を80℃まで昇温した。その後、テトラフルオロエチレンを30g加えた。このとき槽内の圧力は0.809MPaとなった。これに撹拌下、過硫酸アンモニウム(APS)の1質量%水溶液22gを加え、反応を開始した。反応開始時に酢酸ビニルの追加を開始し、6時間かけて283gの酢酸ビニルを追加した。反応中は酢酸ビニル/テトラフルオロエチレンの比率が一定になるように、電磁弁を用いてテトラフルオロエチレンを連続供給した。撹拌速度は500rpmであった。
酢酸ビニル/テトラフルオロエチレン共重合体(酢酸ビニル/テトラフルオロエチレン=49/51(モル比))22.5gをテトラヒドロフラン150mlに溶解させた。この溶液に26質量%NaOH溶液(水/メタノール=50/50(質量%))を8g加え攪拌した。反応溶液をIR測定することにより、加水分解反応の追跡を行った。加水分解が100%進行したところで、溶液を濃縮し、再沈殿、洗浄、乾燥することで、ビニルアルコール/テトラフルオロエチレン共重合体をほぼ定量的に得た。交互率は62%であった。
各成分を25℃で混合し、ビニリデンフルオライド/テトラフルオロエチレン共重合体(ビニリデンフルオライド/テトラフルオロエチレン=80/20(モル%))18.0質量%、ポリエチレンオキシド(PEG600)3.0質量%、ジメチルアセトアミド79.0質量%のポリマー溶液を得た。このポリマー溶液を二重管式口金から、内部液としてイオン交換水を同伴させながら吐出し、イオン交換水中にて固化した。得られた中空糸膜は、外径0.91mm、内径0.80mmであった。25℃で水圧を0.1MPaGをかけたが、純水は透過しなかった。最大点破断強度は4.7MPa、最大点伸度は590%であった。
(酢酸ビニル/テトラフルオロエチレン共重合体の合成)
3Lステンレス製オートクレーブ中に酢酸ブチル溶媒1200gと酢酸ビニルモノマー140gを仕込み、触媒のパーブチルPVを7.2g加え、フランジを締め、オートクレーブを真空置換して、テトラフルオロエチレンを200g封入し、撹拌速度200rpmにて槽内を60℃まで昇温して反応を開始した。重合圧力が降下していることからガスモノマーの消費を確認し、6時間で攪拌を止め、残ガスをブローして反応を終了した。
反応終了後、ポリマー溶液を大量のメタノール溶液に再沈させ、ポリマーの精製を行い、酢酸ビニル/テトラフルオロエチレン共重合体を得た。
フッ素の元素分析より求めた、酢酸ビニル/テトラフルオロエチレン共重合体の組成は、43/57(モル比)であった。
酢酸ビニル/テトラフルオロエチレン共重合体(酢酸ビニル/テトラフルオロエチレン=43/57(モル比))20.0gをテトラヒドロフラン150mlに溶解させた。この溶液に26質量%NaOH溶液(水/メタノール=50/50(質量%))を8g加え攪拌した。反応溶液をIR測定することにより、加水分解反応の追跡を行った。加水分解が100%進行したところで、溶液を濃縮し、再沈殿、洗浄、乾燥することで、ビニルアルコール/テトラフルオロエチレン共重合体をほぼ定量的に得た。交互率は40%であった。
各成分を25℃で混合し、ビニリデンフルオライド/テトラフルオロエチレン共重合体(ビニリデンフルオライド/テトラフルオロエチレン=80/20(モル%))18.0質量%、ジメチルアセトアミド82.0質量%のポリマー溶液を得た。このポリマー溶液を二重管式口金から、内部液としてイオン交換水を同伴させながら吐出し、イオン交換水中にて固化した。得られた中空糸膜は、外径0.92mm、内径0.84mmであった。25℃で水圧を0.1MPaGをかけたが、純水は透過しなかった。最大点破断強度は8.0MPa、最大点伸度は740%であった。
各成分を25℃で混合し、ビニルアルコール/テトラフルオロエチレン共重合体(実施例1に記載のもの)18.0質量%、ジメチルアセトアミド82.0質量%のポリマー溶液を得た。このポリマー溶液を、ポリエステル不織布(ユニチカ(株)製 20557FLV)にアプリケーター(203μm)を用いて塗布し、直ちに25℃の水凝固浴中に5分間浸漬し、さらに92℃の熱水に2分間浸漬し平膜の多孔質膜を得た。25℃での純水透過係数は、4.9×10−6[m3/m2/Pa/s]であった。膜の接触角(水)は88°であった。
(ステアリン酸ビニル/テトラフルオロエチレン共重合体の合成)
300mlステンレス製オートクレーブ中に酢酸ブチル溶媒50gとステアリン酸ビニルモノマー10.0gを仕込み、触媒のパーブチルPVを0.4g加え、フランジを締め、オートクレーブを真空置換して、テトラフルオロエチレンを3.0g封入し、60℃の振とう式恒温槽に入れて反応を開始した。重合圧力が降下していることからガスモノマーの消費を確認し、2時間で振とうを止め、残ガスをブローして反応を終了した。
反応終了後、ポリマー溶液を大量のメタノール溶液に再沈させ、ポリマーの精製を行い、ステアリン酸ビニル/テトラフルオロエチレン共重合体を得た。
フッ素の元素分析より求めた、ステアリン酸ビニル/テトラフルオロエチレン共重合体の組成は、68/32(モル比)であった。
ステアリン酸ビニル/テトラフルオロエチレン共重合体(ステアリン酸ビニル/テトラフルオロエチレン=68/32(モル比))4.3gをテトラヒドロフラン50mlに溶解させた。この溶液に26質量%NaOH溶液(水/メタノール=50/50(質量%))を5g加え攪拌した。反応溶液をIR測定することにより、加水分解反応の追跡を行った。加水分解が100%進行したところで、溶液を濃縮し、ろ過、再沈殿、洗浄、乾燥することで、ビニルアルコール/テトラフルオロエチレン共重合体をほぼ定量的に得た。交互率は25%であった。
各成分を25℃で混合し、ビニルアルコール/テトラフルオロエチレン共重合体(実施例1に記載のもの)9.0質量%、ビニリデンフルオライド/テトラフルオロエチレン共重合体(ビニリデンフルオライド/テトラフルオロエチレン=80/20(モル%))9.0質量%、ジメチルアセトアミド82.0質量%のポリマー溶液を得た。このポリマー溶液を、ポリエステル不織布(ユニチカ(株)製、20557FLV)にアプリケーター(203μm)を用いて塗布し、直ちに25℃の水凝固浴中に5分間浸漬し、さらに92℃の熱水に2分間浸漬し平膜の多孔質膜を得た。25℃での純水透過係数は、2.3×10−8[m3/m2/Pa/s]であった。膜の接触角(水)は77°であり、水滴は10分以内に膜内に染み込んでいった。
各成分を25℃で混合し、ビニリデンフルオライド/テトラフルオロエチレン共重合体(ビニリデンフルオライド/テトラフルオロエチレン=80/20(モル%))18.0質量%、ジメチルアセトアミド82.0質量%のポリマー溶液を得た。このポリマー溶液を、ポリエステル不織布(ユニチカ(株)製、20557FLV)にアプリケーター(203μm)を用いて塗布し、直ちに25℃の水凝固浴中に5分間浸漬し、さらに92℃の熱水に2分間浸漬し平膜の多孔質膜を得た。25℃での純水透過係数は、4.6×10−10[m3/m2/Pa/s]であった。また、別途ガラス板上に、同様の方法で作製した多孔質膜の接触角(水)は、89°であった。
各成分を25℃で混合し、ビニルアルコール/テトラフルオロエチレン共重合体(実施例1に記載のもの)9.0質量%、ポリフッ化ビニリデン(ダイキン工業(株)製)9.0質量%、ジメチルアセトアミド82.0質量%のポリマー溶液を得た。このポリマー溶液を、ポリエステル不織布(ユニチカ(株)製 20557FLV)にアプリケーター(203μm)を用いて塗布し、直ちに25℃の水凝固浴中に5分間浸漬し、さらに92℃の熱水に2分間浸漬し平膜の多孔質膜を得た。25℃での純水透過係数は、7.3×10−9[m3/m2/Pa/s]であった。膜の接触角(水)は78°であり、水滴は10分以内に膜内に染み込んでいった。
各成分を25℃で混合し、ポリフッ化ビニリデン(ダイキン工業(株)製)18.0質量%、ジメチルアセトアミド82.0質量%のポリマー溶液を得た。このポリマー溶液を、ポリエステル不織布(ユニチカ(株)製 20557FLV)にアプリケーター(203μm)を用いて塗布し、直ちに25℃の水凝固浴中に5分間浸漬し、さらに92℃の熱水に2分間浸漬し平膜の多孔質膜を得た。25℃での純水透過係数は、5.9×10−10[m3/m2/Pa/s]であった。また、別途ガラス板上に、同様の方法で作製した多孔質膜の接触角(水)は、112°であった。
Claims (5)
- 共重合体(A)とフッ化ビニリデン系樹脂とからなり、
前記共重合体(A)は、ビニルアルコール単位及びテトラフルオロエチレン単位を有し、ビニルアルコール単位とテトラフルオロエチレン単位との交互率が30%以上である
ことを特徴とする高分子多孔質膜。 - 共重合体(A)は、ビニルアルコール単位及びテトラフルオロエチレン単位のモル比(ビニルアルコール単位/テトラフルオロエチレン単位)が25〜75/75〜25である請求項1記載の高分子多孔質膜。
- 非溶媒誘起相分離法、熱誘起相分離法、又は、それら両方の組み合わせにより作製されたものである請求項1又は2記載の高分子多孔質膜。
- 中空糸膜である請求項1、2又は3記載の高分子多孔質膜。
- 水処理用である請求項1、2、3又は4記載の高分子多孔質膜。
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US (1) | US20150021261A1 (ja) |
EP (1) | EP2784108A4 (ja) |
JP (2) | JP2013151671A (ja) |
KR (1) | KR20140116146A (ja) |
CN (1) | CN103975005A (ja) |
IN (1) | IN2014KN01268A (ja) |
TW (1) | TW201341046A (ja) |
WO (1) | WO2013099966A1 (ja) |
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JPWO2014084356A1 (ja) * | 2012-11-30 | 2017-01-05 | 旭硝子株式会社 | 含フッ素共重合体からなる分離膜 |
CN105339427B (zh) * | 2013-06-26 | 2018-04-10 | 大金工业株式会社 | 组合物、高分子多孔质膜和亲水化剂 |
EP3061512B1 (en) * | 2013-10-23 | 2020-12-09 | Daikin Industries, Ltd. | Embossed filter medium for air filter, filter pack, air filter unit, and production method for embossed filter medium for air filter |
WO2015087702A1 (ja) * | 2013-12-13 | 2015-06-18 | 東レ株式会社 | 多層分離膜 |
JP6447623B2 (ja) * | 2014-03-03 | 2019-01-09 | Jnc株式会社 | 複合微多孔質膜及びこれを用いたフィルター |
KR101738732B1 (ko) | 2014-07-04 | 2017-05-24 | 연세대학교 산학협력단 | 안티파울링 특성이 강화된 고분자막의 제조 방법 |
CN104377377B (zh) * | 2014-09-18 | 2016-07-06 | 苏州经贸职业技术学院 | 一种燃料电池复合聚合物膜及其制备方法 |
JP6810386B2 (ja) * | 2014-12-26 | 2021-01-06 | 国立大学法人 奈良先端科学技術大学院大学 | 低タンパク質吸着性材料、低タンパク質吸着性物品、低細胞付着性材料および低細胞付着性物品 |
WO2016133206A1 (ja) * | 2015-02-20 | 2016-08-25 | ダイキン工業株式会社 | 親水化剤、親水化剤を含む組成物及び高分子多孔質膜 |
CN105988627B (zh) * | 2015-02-25 | 2020-06-30 | 宸鸿科技(厦门)有限公司 | 触控显示装置及其制造方法 |
JP6592306B2 (ja) * | 2015-08-21 | 2019-10-16 | 学校法人 中央大学 | リン吸着用多孔質膜およびその製造方法 |
CN107793515A (zh) * | 2017-10-12 | 2018-03-13 | 江门建滔电子发展有限公司 | 四氟乙烯‑乙烯醇共聚物及采用其制备的半固化片和覆铜板 |
TWI668046B (zh) * | 2018-07-18 | 2019-08-11 | 國立臺北科技大學 | 過濾材的製造方法、過濾材的製造裝置及使用該方法所得之過濾材 |
JP7177016B2 (ja) * | 2019-07-24 | 2022-11-22 | 富士フイルム株式会社 | 多孔質膜およびフィルターカートリッジ |
US11617989B1 (en) * | 2020-09-04 | 2023-04-04 | King Saud University | Extraction of benzene from benzene/cyclohexane mixture |
CN114277509B (zh) * | 2021-12-24 | 2023-01-03 | 江南大学 | 一种静电纺聚酰亚胺均匀小孔径纳米纤维膜及其制备方法与应用 |
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- 2012-12-26 KR KR20147020679A patent/KR20140116146A/ko not_active Application Discontinuation
- 2012-12-26 WO PCT/JP2012/083690 patent/WO2013099966A1/ja active Application Filing
- 2012-12-26 CN CN201280059751.XA patent/CN103975005A/zh active Pending
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KR20140116146A (ko) | 2014-10-01 |
EP2784108A1 (en) | 2014-10-01 |
TW201341046A (zh) | 2013-10-16 |
JP2013151671A (ja) | 2013-08-08 |
IN2014KN01268A (ja) | 2015-10-16 |
EP2784108A4 (en) | 2015-08-12 |
WO2013099966A1 (ja) | 2013-07-04 |
US20150021261A1 (en) | 2015-01-22 |
JP5861734B2 (ja) | 2016-02-16 |
CN103975005A (zh) | 2014-08-06 |
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