CN102580579A - 一种耐无机污染的抗菌反渗透膜及其制备方法 - Google Patents
一种耐无机污染的抗菌反渗透膜及其制备方法 Download PDFInfo
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- CN102580579A CN102580579A CN2012100642381A CN201210064238A CN102580579A CN 102580579 A CN102580579 A CN 102580579A CN 2012100642381 A CN2012100642381 A CN 2012100642381A CN 201210064238 A CN201210064238 A CN 201210064238A CN 102580579 A CN102580579 A CN 102580579A
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- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 38
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 16
- 239000010410 layer Substances 0.000 claims abstract description 15
- 229920000642 polymer Polymers 0.000 claims abstract description 14
- 239000004952 Polyamide Substances 0.000 claims abstract description 9
- 239000002346 layers by function Substances 0.000 claims abstract description 9
- 229920002647 polyamide Polymers 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 7
- 238000004132 cross linking Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 17
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- 239000003431 cross linking reagent Substances 0.000 claims description 7
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- 150000008064 anhydrides Chemical class 0.000 claims description 2
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- 230000002035 prolonged effect Effects 0.000 abstract 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 description 7
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
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- 231100000719 pollutant Toxicity 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- UMHJEEQLYBKSAN-UHFFFAOYSA-N Adipaldehyde Chemical compound O=CCCCCC=O UMHJEEQLYBKSAN-UHFFFAOYSA-N 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- PCSMJKASWLYICJ-UHFFFAOYSA-N Succinic aldehyde Chemical compound O=CCCC=O PCSMJKASWLYICJ-UHFFFAOYSA-N 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 238000005575 aldol reaction Methods 0.000 description 1
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- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 230000002950 deficient Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
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- 239000005416 organic matter Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102921315A (zh) * | 2012-11-02 | 2013-02-13 | 北京碧水源膜科技有限公司 | 一种抗污染反渗透膜及其制备方法 |
CN103480284A (zh) * | 2013-09-03 | 2014-01-01 | 株洲时代新材料科技股份有限公司 | 一种耐污染聚酰胺复合膜及其制备方法 |
CN104069749A (zh) * | 2014-07-21 | 2014-10-01 | 山东九章膜技术有限公司 | 一种超支化聚合物聚酰胺复合反渗透膜及其制备方法 |
CN104437111A (zh) * | 2014-12-16 | 2015-03-25 | 彭博 | 一种抗污染聚酰胺复合膜及其制备方法 |
CN104548965A (zh) * | 2013-10-15 | 2015-04-29 | 中国石油化工股份有限公司 | 一种抗微生物污染的薄层复合膜的制备方法 |
CN105396462A (zh) * | 2015-12-25 | 2016-03-16 | 成都美富特膜科技有限公司 | 一种复合改性试剂及其制备方法 |
CN105396463A (zh) * | 2015-12-25 | 2016-03-16 | 成都美富特膜科技有限公司 | 一种控制反渗透膜表面电位的方法 |
CN105617872A (zh) * | 2015-12-25 | 2016-06-01 | 成都美富特膜科技有限公司 | 一种复合改性试剂在反渗透膜中的应用 |
CN106474945A (zh) * | 2015-08-28 | 2017-03-08 | 中国石油化工股份有限公司 | 一种抗菌聚酰胺高分子膜及其制备方法和应用 |
CN106823834A (zh) * | 2017-03-29 | 2017-06-13 | 福州大学 | 一种具有持久抗菌性能的反渗透膜及其制备方法 |
CN110302683A (zh) * | 2019-07-09 | 2019-10-08 | 浙江海纳环保科技有限公司 | 基于分子通道结构调整的新的抗污染反渗透膜的制备方法 |
CN110548401A (zh) * | 2019-08-27 | 2019-12-10 | 武汉艾科滤膜技术有限公司 | 一种抑菌超滤膜组件 |
CN110917903A (zh) * | 2018-09-20 | 2020-03-27 | 中国石油化工股份有限公司 | 一种反渗透膜及制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1066845A (ja) * | 1996-08-26 | 1998-03-10 | Nitto Denko Corp | 逆浸透複合膜 |
US6413425B1 (en) * | 1997-04-10 | 2002-07-02 | Nitto Denko Corporation | Reverse osmosis composite membrane and reverse osmosis treatment method for water using the same |
CN101130444A (zh) * | 2006-08-23 | 2008-02-27 | 贵阳时代汇通膜科技有限公司 | 低污染复合反渗透膜 |
CN101462024A (zh) * | 2008-12-24 | 2009-06-24 | 北京时代沃顿科技有限公司 | 一种高强度抗污染层复合反渗透膜及其制备方法 |
CN101874989A (zh) * | 2009-12-18 | 2010-11-03 | 北京时代沃顿科技有限公司 | 一种耐微生物污染的复合反渗透膜及其制备方法 |
-
2012
- 2012-03-12 CN CN201210064238.1A patent/CN102580579B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1066845A (ja) * | 1996-08-26 | 1998-03-10 | Nitto Denko Corp | 逆浸透複合膜 |
US6413425B1 (en) * | 1997-04-10 | 2002-07-02 | Nitto Denko Corporation | Reverse osmosis composite membrane and reverse osmosis treatment method for water using the same |
CN101130444A (zh) * | 2006-08-23 | 2008-02-27 | 贵阳时代汇通膜科技有限公司 | 低污染复合反渗透膜 |
CN101462024A (zh) * | 2008-12-24 | 2009-06-24 | 北京时代沃顿科技有限公司 | 一种高强度抗污染层复合反渗透膜及其制备方法 |
CN101874989A (zh) * | 2009-12-18 | 2010-11-03 | 北京时代沃顿科技有限公司 | 一种耐微生物污染的复合反渗透膜及其制备方法 |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102921315A (zh) * | 2012-11-02 | 2013-02-13 | 北京碧水源膜科技有限公司 | 一种抗污染反渗透膜及其制备方法 |
CN102921315B (zh) * | 2012-11-02 | 2014-12-10 | 北京碧水源膜科技有限公司 | 一种抗污染反渗透膜及其制备方法 |
CN103480284A (zh) * | 2013-09-03 | 2014-01-01 | 株洲时代新材料科技股份有限公司 | 一种耐污染聚酰胺复合膜及其制备方法 |
CN104548965A (zh) * | 2013-10-15 | 2015-04-29 | 中国石油化工股份有限公司 | 一种抗微生物污染的薄层复合膜的制备方法 |
CN104069749A (zh) * | 2014-07-21 | 2014-10-01 | 山东九章膜技术有限公司 | 一种超支化聚合物聚酰胺复合反渗透膜及其制备方法 |
CN104069749B (zh) * | 2014-07-21 | 2016-06-22 | 山东九章膜技术有限公司 | 一种超支化聚合物聚酰胺复合反渗透膜及其制备方法 |
CN104437111A (zh) * | 2014-12-16 | 2015-03-25 | 彭博 | 一种抗污染聚酰胺复合膜及其制备方法 |
CN106474945A (zh) * | 2015-08-28 | 2017-03-08 | 中国石油化工股份有限公司 | 一种抗菌聚酰胺高分子膜及其制备方法和应用 |
CN105617872A (zh) * | 2015-12-25 | 2016-06-01 | 成都美富特膜科技有限公司 | 一种复合改性试剂在反渗透膜中的应用 |
CN105396463A (zh) * | 2015-12-25 | 2016-03-16 | 成都美富特膜科技有限公司 | 一种控制反渗透膜表面电位的方法 |
CN105396462A (zh) * | 2015-12-25 | 2016-03-16 | 成都美富特膜科技有限公司 | 一种复合改性试剂及其制备方法 |
CN106823834A (zh) * | 2017-03-29 | 2017-06-13 | 福州大学 | 一种具有持久抗菌性能的反渗透膜及其制备方法 |
CN110917903A (zh) * | 2018-09-20 | 2020-03-27 | 中国石油化工股份有限公司 | 一种反渗透膜及制备方法 |
CN110302683A (zh) * | 2019-07-09 | 2019-10-08 | 浙江海纳环保科技有限公司 | 基于分子通道结构调整的新的抗污染反渗透膜的制备方法 |
CN110548401A (zh) * | 2019-08-27 | 2019-12-10 | 武汉艾科滤膜技术有限公司 | 一种抑菌超滤膜组件 |
CN110548401B (zh) * | 2019-08-27 | 2022-03-08 | 武汉艾科滤膜技术有限公司 | 一种抑菌超滤膜组件 |
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