Juan Luis Fajardo-Diaz, Armando David Martinez-Iniesta, Ayaka Yamanaka, Syogo Tejima, Kazou Izu, Shigero Saito, Jun Maeda, My Ali El Khakani, Winadda Wongwiriyapan, Feng Wang, Takuya Hayashi, Kenji Takeuchi, Rodolfo Cruz-Silva, Morinobu Endo
{"title":"Advanced Water Production via Point of Use Super-Ultralow-Pressure Reverse Osmosis and Cellulose-Polyamide Thin-Film Nanocomposite Membranes","authors":"Juan Luis Fajardo-Diaz, Armando David Martinez-Iniesta, Ayaka Yamanaka, Syogo Tejima, Kazou Izu, Shigero Saito, Jun Maeda, My Ali El Khakani, Winadda Wongwiriyapan, Feng Wang, Takuya Hayashi, Kenji Takeuchi, Rodolfo Cruz-Silva, Morinobu Endo","doi":"10.1002/admi.202500318","DOIUrl":null,"url":null,"abstract":"<p>A novel thin-film nanocomposite reverse osmosis (RO) membrane was developed for point-of-use applications (POU-RO) at super-ultralow pressure (0.2 MPa), incorporating carboxymethylated cellulose nanofibers (CM-CNF). The CM-CNF with an increased number of oxygen-containing functional groups that positively impacts water flux, salt rejection stability, antifouling characteristics, and resistance to chlorine degradation compared to commercial RO-PA membranes. Transmission electron microscopy (TEM), combined with geodesic and skeletonized image analysis, revealed that the average thickness of the PA/CM-CNF membrane is 1050 nm corresponding to more than four leaf-like layers, significantly higher than commercial membranes, which typically show fewer than two layers. Moreover, a void-free active layer is created, providing excellent substrate coverage. Tests with CaCl<sub>2</sub> at 0.2 MPa showed 93.9% salt rejection and a water permeation rate of 0.93 m/d, doubling the performance of commercial membranes. Dynamic simulations confirmed the influence of CM-CNF on enhancing water diffusion at low pressure (0.2 MPa). POU-RO tests, conducted using a 2-inch spiral module fabricated in the laboratory, confirmed the superior performance of the CM-CNF membrane. Indeed, high recovery rates (>60%) and high permeation rates (close to 0.7 m/d) have been achieved by the membranes. This performance is twice than the commercial counterparts tested at 0.2 MPa.</p>","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"12 14","pages":""},"PeriodicalIF":4.4000,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202500318","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Materials Interfaces","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/admi.202500318","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A novel thin-film nanocomposite reverse osmosis (RO) membrane was developed for point-of-use applications (POU-RO) at super-ultralow pressure (0.2 MPa), incorporating carboxymethylated cellulose nanofibers (CM-CNF). The CM-CNF with an increased number of oxygen-containing functional groups that positively impacts water flux, salt rejection stability, antifouling characteristics, and resistance to chlorine degradation compared to commercial RO-PA membranes. Transmission electron microscopy (TEM), combined with geodesic and skeletonized image analysis, revealed that the average thickness of the PA/CM-CNF membrane is 1050 nm corresponding to more than four leaf-like layers, significantly higher than commercial membranes, which typically show fewer than two layers. Moreover, a void-free active layer is created, providing excellent substrate coverage. Tests with CaCl2 at 0.2 MPa showed 93.9% salt rejection and a water permeation rate of 0.93 m/d, doubling the performance of commercial membranes. Dynamic simulations confirmed the influence of CM-CNF on enhancing water diffusion at low pressure (0.2 MPa). POU-RO tests, conducted using a 2-inch spiral module fabricated in the laboratory, confirmed the superior performance of the CM-CNF membrane. Indeed, high recovery rates (>60%) and high permeation rates (close to 0.7 m/d) have been achieved by the membranes. This performance is twice than the commercial counterparts tested at 0.2 MPa.
期刊介绍:
Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018.
The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface.
Advanced Materials Interfaces covers all topics in interface-related research:
Oil / water separation,
Applications of nanostructured materials,
2D materials and heterostructures,
Surfaces and interfaces in organic electronic devices,
Catalysis and membranes,
Self-assembly and nanopatterned surfaces,
Composite and coating materials,
Biointerfaces for technical and medical applications.
Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.