陈逢军,贺提喜.静电喷印辅助界面聚合法制备纳米纤维复合膜实现海水脱盐[J].表面技术,2022,51(5):354-362, 373.
CHEN Feng-jun,HE Ti-xi.Nanofiber Composite Membrane Prepared by Electrostatic Printing Assisted Interfacial Polymerization for Seawater Desalination[J].Surface Technology,2022,51(5):354-362, 373 |
| 静电喷印辅助界面聚合法制备纳米纤维复合膜实现海水脱盐 |
| Nanofiber Composite Membrane Prepared by Electrostatic Printing Assisted Interfacial Polymerization for Seawater Desalination |
| |
| DOI：10.16490/j.cnki.issn.1001-3660.2022.05.036 |
| 中文关键词: 静电喷印 界面聚合 纳米纤维复合膜 膜层 功能表面 海水过滤 |
| 英文关键词:electrostatic spray print interfacial polymerization nanofiber composite membrane membrane layer functional surface seawater filtration |
| 基金项目:国家自然科学基金(51975204);湖南省自然科学基金(2021JJ30103);湖南省重点研发计划(2021GK2025) |
|
|
|
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 提出一种静电喷印辅助界面聚合法制备纳米纤维复合膜实现海水过滤的方法。方法 通过在静电喷印聚丙烯腈(Polyacrylonitrile，PAN)纳米纤维基底上进行界面聚合，将哌嗪、三甲酰氯和聚醚胺(Polyether Amine，PEA)聚合在聚丙烯腈纳米纤维基底上。首先将PAN纳米纤维基底在水相溶液中浸泡，均匀吸附基材表面的哌嗪和PEA，用滤纸吸干多余的水溶液，然后将有机相三甲酰氯引入PAN基底表面，与水相进行反应，制备了具有良好过滤性能的纳米纤维复合膜(Thin Film Nanofiltration Composite，TFNC)，研究了PEA浓度对TFNC复合膜过滤性能的影响。通过场发射扫描电子显微镜、原子力显微镜、傅里叶变换红外光谱仪、接触角测量仪和Zeta电位仪，表征了复合膜的微观形貌、界面聚合反应、亲水性和荷电性。选用4种无机盐通过死端过滤装置系统对TFNC膜的过滤性能进行测试。结果 PAN溶液能够在滚筒表面静电喷印形成均匀的膜表面结构。在20 kV静电高压下，纺丝质量分数为8%的PAN透明溶液所制备的薄膜表面光滑。当PEA的质量分数4.5%时，TFNC复合膜的接触角最小，为47.5°。经过4种无机盐的过滤性能测试发现，在25 ℃、0.4 MPa条件下，当PEA的质量分数为3.0%时，该膜的水通量可达41.5 L/(m2.h)，对NaCl的截留率较低(18.6%)，但对阴离子染料MYB的截留率最高(达95.4%)。结论 静电喷印辅助界面聚合法能够简单有效地制备纳米纤维复合膜，且获得光滑、均匀的亲水性表面，通过改变PEA的浓度可调节复合纳滤膜的分离性能，有效地去除海水中的盐分，具有极强的开发潜力。 |
| 英文摘要: |
| A method of preparing nanofiber composite membrane was proposed by electrostatic spray print assisted interfacial polymerization for seawater filtration. Polyacrylonitrile (PAN) nanofiber substrate was intercalated via polyether amine (PEA), piperazine and triformyl chloride. PAN nanofiber was soaked in aqueous solution that piperazine and PEA were uniformly adsorbed on the substrate surface, firstly. The excess aqueous solution was dried with filter paper, and then organic triformyl chloride was introduced into the surface of PAN substrate to react with aqueous phase, then thin film nanofiltration composite (TFNC) with good filtration performance was prepared. The filtration performance of TFNC composite membrane with PEA concentration was studied. The microstructures were characterized by field emission scanning electron microscopy and atomic force microscopy, interfacial polymerization with fourier transform infrared absorption spectrometer, hydrophilicity with contact angle measuring instrument and charge property of the composite films with Zeta potentiometer. Four kinds of inorganic salts were selected to test the filtration performance of TFNC membrane by dead-end filtration system. PAN solution can be electrospun on the surface of roller to form a uniform film surface structure. The surface of the thin films prepared with PAN transparent solution was smooth with a printing concentration of 8wt.% under 20 kV electrostatic high pressure. When PEA concentration was 4.5wt.%, the contact angle of TFNC composite membrane was the smallest, reaching 47.5°. The filtration performance test of four inorganic salts showed that at 25 ℃ and 0.4 MPa, when PEA concentration was 3.0wt.%, the water flux of the membrane could reach 41.5 L/(m2.h), and the interception rate of NaCl was low (18.6%), but the interception rate of anionic dye MYB was the highest (95.4%). Electrostatic spray prin assisted interfacial polymerization can prepare nanofiber composite membrane simply and effectively, and obtain smooth, uniform hydrophilic surface. The separation performance of composite nanofiltration membrane can be adjusted by changing the concentration of PEA, and the salt from seawater can be remove effectively, which has strong development potential. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501715号