Journal of Membrane Science Letters最新文献_第4页

Charge-patterned nanofiltration membranes with polystyrene sulfonate particles and polyethyleneimine in cross-linked polyvinyl alcohol 带有聚苯乙烯磺酸盐颗粒和交联聚乙烯醇中的聚乙烯亚胺的电荷图案纳滤膜

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-12-01 Epub Date: 2024-07-04 DOI: 10.1016/j.memlet.2024.100078

Ali Behboudi , Philipp Jahn , Mathias Ulbricht

{"title":"Charge-patterned nanofiltration membranes with polystyrene sulfonate particles and polyethyleneimine in cross-linked polyvinyl alcohol","authors":"Ali Behboudi , Philipp Jahn , Mathias Ulbricht","doi":"10.1016/j.memlet.2024.100078","DOIUrl":"10.1016/j.memlet.2024.100078","url":null,"abstract":"<div><p>Removing salinity has always been a challenge for wastewater treatment. Utilizing nanofiltration (NF) membranes is a promising approach. However, currently available NF membranes are less effective in monovalent salt removal. In this study, work toward the initial aim of fabricating charge mosaic membranes led to charge-patterned NF-selective films on polyether sulfone (PES) or polyacrylonitrile (PAN) support membranes, with similar rejection for mono- and divalent salts. The membranes were fabricated by a two-step layer assembly of first negatively charged polystyrene sulfonate (PSS) particles immobilized in a polyvinyl alcohol (PVA) layer, followed by coating a positively charged polyethyleneimine (PEI) layer. Both PVA and PEI were crosslinked using glutaraldehyde that had initially been impregnated into the support membrane. The type of support membrane, nanoparticle, PVA, and PEI concentrations during fabrication, as well as feed pH and salt concentration, play significant roles in separation performance of obtained composite membranes. Charge-patterned NF membranes fabricated using 0.5 wt.% PVA and 0.05 wt.% PSS for assembly of the first layer followed by coating 0.5 wt.% PEI solution had even somewhat higher rejection for monovalent salt (NaCl; ∼82%) compared to multivalent salts (Na<sub>2</sub>SO<sub>4</sub>, MgSO<sub>4</sub>, and MgCl<sub>2</sub>; ∼74%), at a permeance of 5.5 LMH/bar on the PES and 3.1 LMH/bar on the PAN support membrane.</p></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 2","pages":"Article 100078"},"PeriodicalIF":4.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772421224000126/pdfft?md5=fe4f38456e65fab7493e29dffa1f4c18&pid=1-s2.0-S2772421224000126-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141629790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Desalination of complex saline waters: sulfonated pentablock copolymer pervaporation membranes do not fail when exposed to scalants and surfactants 复杂盐水的脱盐：磺化五嵌段共聚物渗透膜在暴露于脱盐剂和表面活性剂时不会失效

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-12-01 Epub Date: 2024-08-08 DOI: 10.1016/j.memlet.2024.100080

Mariana Hernandez Molina , Yusi Li , W. Shane Walker , Rafael Verduzco , Mary Laura Lind , François Perreault

{"title":"Desalination of complex saline waters: sulfonated pentablock copolymer pervaporation membranes do not fail when exposed to scalants and surfactants","authors":"Mariana Hernandez Molina , Yusi Li , W. Shane Walker , Rafael Verduzco , Mary Laura Lind , François Perreault","doi":"10.1016/j.memlet.2024.100080","DOIUrl":"10.1016/j.memlet.2024.100080","url":null,"abstract":"<div><p>As a vapor pressure-driven process, pervaporation (PV) shares several of the advantages of membrane distillation (MD), such as the ability to tackle high salinity waters and the possibility of integrating low grade heat sources to reduce energy consumption. Membrane scaling and pore wetting remain strong limitations to the implementation of MD desalination. In comparison, dense, non-porous PV membranes are considered. In this study, PV membranes made from NEXAR<sup>TM</sup>, a sulfonated pentablock copolymer, were evaluated and compared to polytetrafluoroethylene (PTFE) MD membranes in a vacuum configuration. The membranes were tested using three solutions: 32 g L<sup>-1</sup> sodium chloride (NaCl), a brackish water (8.4 g L<sup>-1</sup>) of high scaling potential, and 5.5 g L<sup>-1</sup> NaCl with 1 mM sodium dodecyl sulfate. The NEXAR<sup>TM</sup> membrane achieved a permeance of 93.1±44.6 kg m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup> for the 32 g L<sup>-1</sup> brine, which was almost 20% higher than the PTFE MD membrane. This permeance decreased in the presence of foulants; however, in contrast with the MD membrane, where scaling and surfactants induced pore wetting, the salt rejection for the NEXAR<sup>TM</sup> PV membrane was constant at >99% for all water types. These results emphasize the robustness of PV as a process to deal with challenging saline waters.</p></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 2","pages":"Article 100080"},"PeriodicalIF":4.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277242122400014X/pdfft?md5=536fe3e31ef071d80e71b4c2f2148846&pid=1-s2.0-S277242122400014X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141979324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermodynamic efficiency of membrane separation of dilute gas: Estimation for CO2 direct air capture application 稀释气体膜分离的热力学效率：二氧化碳直接空气捕获应用估算

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-12-01 Epub Date: 2024-09-19 DOI: 10.1016/j.memlet.2024.100085

Masaki Kato , Teruki Ando , Cho Rong Kim , Seiya Yokokura , Hiroki Waizumi , Toshihiro Shimada

引用次数: 0

Polyvinylidene fluoride-alkali lignin blend: A new candidate for membranes development 聚偏二氟乙烯-碱木素混合物：开发薄膜的新候选材料

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-12-01 Epub Date: 2024-08-29 DOI: 10.1016/j.memlet.2024.100081

Serena Regina, Teresa Poerio, Rosalinda Mazzei, Lidietta Giorno

{"title":"Polyvinylidene fluoride-alkali lignin blend: A new candidate for membranes development","authors":"Serena Regina, Teresa Poerio, Rosalinda Mazzei, Lidietta Giorno","doi":"10.1016/j.memlet.2024.100081","DOIUrl":"10.1016/j.memlet.2024.100081","url":null,"abstract":"<div><p>New blend membranes consisting of a tuned ratio of polyvinylidene fluoride (PVDF) and alkali lignin (AL) were studied. Through the use of a green solvent like dimethyl sulfoxide, effective mixing between PVDF and AL was achieved, leading to the development of highly hydrophilic membranes with robust mechanical stability. Characterization methods confirmed the suitability of the blend for membrane preparation and its hydrophilic nature.</p><p>A key aspect of the strategy involved hydrophilizing PVDF during the preparation process by blending it with AL in the pot. This approach aimed to streamline production by reducing the number of steps compared to post-treatment methods such as grafting or coating. The presence of hydrophobic/hydrophilic groups in the AL structure addressed the challenge of compatibility between PVDF and conventional hydrophilic polymers, enhancing interaction between the components.</p><p>The resulting hydrophilic material exhibited improved pure water permeance and demonstrated resistance to irreversible fouling. The membrane's ability to process wastewater streams and its resistance to fouling was demonstrated by separating stable and uniform submicron oil-in-water emulsions with high rejection (>99.9 %) up to a volume reduction factor (VRF) of 7.7.</p></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 2","pages":"Article 100081"},"PeriodicalIF":4.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772421224000151/pdfft?md5=aa92dbc31fdee0cb574b9097a0a31edf&pid=1-s2.0-S2772421224000151-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced phosphate anion flux through single-ion, reverse-selective mixed-matrix cation exchange membrane 通过单离子反向选择混合基质阳离子交换膜提高磷酸盐阴离子通量

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-12-01 Epub Date: 2024-09-26 DOI: 10.1016/j.memlet.2024.100086

Xinyi Wang , Minhao Xiao , Sungsoon Kim , Jeffrey Zhang , Minju Cha , Anya Dickinson-Cove , Fan Yang , Kenji Lam , Sungju Im , Ziwei Hou , Jishan Wu , Zhiyong Jason Ren , Christos T. Maravelias , Eric M.V. Hoek , David Jassby

{"title":"Enhanced phosphate anion flux through single-ion, reverse-selective mixed-matrix cation exchange membrane","authors":"Xinyi Wang , Minhao Xiao , Sungsoon Kim , Jeffrey Zhang , Minju Cha , Anya Dickinson-Cove , Fan Yang , Kenji Lam , Sungju Im , Ziwei Hou , Jishan Wu , Zhiyong Jason Ren , Christos T. Maravelias , Eric M.V. Hoek , David Jassby","doi":"10.1016/j.memlet.2024.100086","DOIUrl":"10.1016/j.memlet.2024.100086","url":null,"abstract":"<div><div>Phosphate recovery from wastewater is vital for both environmental sustainability and resource conservation, offering the dual benefit of reducing phosphate pollution while providing a valuable source of this essential nutrient. We previously reported an approach for synthesizing hydrous manganese oxide (HMO) nanoparticles within a polymeric cation-exchange membrane (CEM) to achieve a phosphate-selective mixed-matrix membrane (PhSMMM); however, the phosphate flux was lower than desired. Herein, we demonstrate a next-generation PhSMMM membrane with enhanced phosphate flux and selectivity. Experimental results confirm the successful incorporation of up to 28 wt% HMO nanoparticles into the polymeric CEM. The new PhSMMM exhibits a phosphate flux of 1.57 mmol∙m<sup>–2.</sup>hr<sup>–1</sup> (an 8.5X enhancement), with selectivity over chloride, nitrate, and sulfate ions of 9, 11, and 104, respectively. This significant enhancement in phosphate flux marks a promising advancement in a sustainable solution for phosphate removal and recovery from wastewater.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 2","pages":"Article 100086"},"PeriodicalIF":4.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrokinetic index: A new metric for advanced characterization of membranes with various geometries 电动指数：用于表征各种几何形状薄膜的新指标

Journal of Membrane Science Letters Pub Date : 2024-06-01 Epub Date: 2024-02-19 DOI: 10.1016/j.memlet.2024.100069

Agathe Lizée, Patrick Loulergue, Anne Pensel, Anthony Szymczyk

{"title":"Electrokinetic index: A new metric for advanced characterization of membranes with various geometries","authors":"Agathe Lizée, Patrick Loulergue, Anne Pensel, Anthony Szymczyk","doi":"10.1016/j.memlet.2024.100069","DOIUrl":"https://doi.org/10.1016/j.memlet.2024.100069","url":null,"abstract":"<div><p>Electrokinetic measurements to determine the electrical properties (zeta potential) of membrane surfaces have become increasingly popular in the toolbox of characterization techniques. However, it has been established in the literature that parasitic phenomena such as electrokinetic leakage can hamper data interpretation, leading to not only quantitative but also qualitative errors in membrane zeta potential determination. To date, the only method for highlighting and accounting for electrokinetic leakage is limited to flat-sheet membranes. In this letter, we propose an alternative method that is much less time-consuming and applicable to all membrane geometries. This method is based on the determination of the electrokinetic index, which we define as the ratio of the apparent zeta potentials determined from single measurements of the streaming current and streaming potential coefficients. We show that variation in the electrokinetic index reflects modifications occurring within the membrane matrix (in addition to surface properties alteration). The chemical degradation of polyethersulfone (PES)-based flat-sheet and hollow-fiber membranes is used as a proof of concept, but the proposed approach is readily transposable to other problems of practical interest, such as e.g. membrane fouling. This work also paves the way for the development of a new type of electrokinetic sensors for on-line monitoring of membrane operations.</p></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 1","pages":"Article 100069"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772421224000035/pdfft?md5=94b0b88122109a87ea7e94e8a21f6b58&pid=1-s2.0-S2772421224000035-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139915520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of surfactants on membrane fouling during separation of an oil-water emulsion 表面活性剂对油水乳液分离过程中膜堵塞的影响

Journal of Membrane Science Letters Pub Date : 2024-06-01 Epub Date: 2024-03-03 DOI: 10.1016/j.memlet.2024.100072

Xu Yu , Naama Segev , Kirti Sankhala , David Jassby , Eric M.V. Hoek , Guy Z. Ramon

{"title":"Impact of surfactants on membrane fouling during separation of an oil-water emulsion","authors":"Xu Yu , Naama Segev , Kirti Sankhala , David Jassby , Eric M.V. Hoek , Guy Z. Ramon","doi":"10.1016/j.memlet.2024.100072","DOIUrl":"https://doi.org/10.1016/j.memlet.2024.100072","url":null,"abstract":"<div><p>While membrane separation has proven to be an outstanding method for separating oil in water (O/W) emulsions containing droplets smaller than 20 µm, it is severely limited due to fouling. Much research has been aimed at understanding the mechanism behind membrane fouling, particularly for ultrafiltration (UF) membranes. Interestingly, studies pointed out that the emulsifier, namely surfactant, is the main source of fouling in nanofiltration and reverse osmosis, while in the case of UF, oil is generally regarded as the main source of fouling. Herein, we study the fouling of UF membranes during separation of O/W emulsions stabilized by surfactants, with the explicit goal of determining the relative impact of the oil and surfactant present on fouling severity and dynamics. Results obtained from flux decline measurements, complimented by visualization using confocal microscopy, show that oil causes irreversible fouling to a certain extent, however, surfactant fouling dominates the observed membrane performance. The degree of fouling and flux recovery appears to be closely related to the properties the surfactant, namely charge and molecular weight, as has been observed in the past but attributed to the oil-membrane interactions, mediated by the surfactant. Further, to visualize the fouling mechanisms, direct observation via a confocal microscope set-up is used to capture real-time images of the membrane surface, which reveal that surface coverage of oil is not directly related to flux decline during the separation process. Our results suggest that membrane flux decline and fouling is dominated by membrane-surfactant interactions, the exact nature of which is a topic for future extensions of this work.</p></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 1","pages":"Article 100072"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772421224000060/pdfft?md5=e74061dfb215bfb4ced03bb006650015&pid=1-s2.0-S2772421224000060-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140069120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low-cost automated flat-sheet membrane casting: An open-source, advanced manufacturing approach 低成本自动化平板膜铸造：一种开源的先进制造方法

Journal of Membrane Science Letters Pub Date : 2024-06-01 Epub Date: 2024-05-02 DOI: 10.1016/j.memlet.2024.100075

Nathan Mullins, Irina Babamova, Charles-François de Lannoy, David R. Latulippe

{"title":"Low-cost automated flat-sheet membrane casting: An open-source, advanced manufacturing approach","authors":"Nathan Mullins, Irina Babamova, Charles-François de Lannoy, David R. Latulippe","doi":"10.1016/j.memlet.2024.100075","DOIUrl":"10.1016/j.memlet.2024.100075","url":null,"abstract":"<div><p>Novel membrane materials developed in research labs struggle to gain widespread industrial adoption due in part to insufficient reproducibility and unreliable performance data. Open-source hardware approaches, especially 3D printing, enable the democratization of automation within a laboratory setting, and in the context of membranes, can minimize the inherent variability associated with manual methods of membrane casting. In this study, the native hardware and firmware of an inexpensive, conventional 3D printer was extensively modified for the purpose of flat-sheet membrane casting. Replicate poly (ether-ether ketone) (PEEK) membranes were cast with a thickness coefficient of variation of ∼10 % using the modified device. Cast membranes were used to assess the importance of controlling shear rate by characterizing both intra- and inter-film variability. Statistical differences in pure water permeability were observed across tested shear rates, with distinct morphological changes occurring to the membrane substructure. Overall, the technology developed in this study is shown to be an extremely useful approach for improving the process of developing membranes at the bench-scale.</p></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 1","pages":"Article 100075"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772421224000096/pdfft?md5=0d3606fe070e4aee871a825dd4437df6&pid=1-s2.0-S2772421224000096-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141052940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mitigating phase changes in the gas-phase that disrupt CO2 capture in membrane contactors: CO2-NH3-H2O as a model ternary system 缓解气相中破坏膜接触器二氧化碳捕集的相变：以 CO2-NH3-H2O 为模型的三元系统

Journal of Membrane Science Letters Pub Date : 2024-06-01 Epub Date: 2024-05-25 DOI: 10.1016/j.memlet.2024.100076

B.A. Luqmani , V. Nayak , A. Brookes , A. Moore , P. Vale , M. Pidou , E.J. McAdam

{"title":"Mitigating phase changes in the gas-phase that disrupt CO2 capture in membrane contactors: CO2-NH3-H2O as a model ternary system","authors":"B.A. Luqmani , V. Nayak , A. Brookes , A. Moore , P. Vale , M. Pidou , E.J. McAdam","doi":"10.1016/j.memlet.2024.100076","DOIUrl":"https://doi.org/10.1016/j.memlet.2024.100076","url":null,"abstract":"<div><p>Solid and liquid products can form in the gas phase of membrane contactors applied to reactive ternary systems for CO<sub>2</sub> absorption, which poses a critical barrier for carbon capture applications. The mechanism initiating these unwanted phase changes in the gas phase is unclear. This study therefore systematically characterises CO<sub>2</sub> absorption in distinct regions of the vapour-liquid equilibrium (VLE) within an illustrative ternary system (CO<sub>2</sub>-NH<sub>3</sub>-H<sub>2</sub>O), to provide an explanation for the formation and mitigation of these solid and liquid products in the gas-phase. Unstable CO<sub>2</sub> absorption and increased pressure drop indicated product formation within the gas-phase, which occurred at high CO<sub>2</sub> capture ratios. Temporal analysis of gas-phase composition enabled gas-phase products to be related to the relative ternary composition. This was subsequently correlated to distinct regions of the VLE. Consequently, mitigation strategies can be developed with recognition for where products are least likely to form. Pressurisation was proposed to modify the relative gas-phase ammonia composition to reposition conditions within the VLE. The commensurate increase of CO<sub>2</sub> into the solvent shifts the ammonia-ammonium equilibrium towards ammonium to indirectly reduce vapour pressure. This synergistic strategy allows sustained operation of membrane contactors for CO<sub>2</sub> separation within reactive ternary systems which are critical to delivering carbon capture economically at scale.</p></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 1","pages":"Article 100076"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772421224000102/pdfft?md5=a3fd87a26bef61679123f37cbda615e2&pid=1-s2.0-S2772421224000102-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141240021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sample preparation matters: Scanning electron microscopic characterization of polymeric membranes 样品制备：聚合物膜的扫描电子显微镜表征

Journal of Membrane Science Letters Pub Date : 2024-06-01 Epub Date: 2024-03-21 DOI: 10.1016/j.memlet.2024.100073

Jishan Wu , Minhao Xiao , Javier A. Quezada-Renteria , Ziwei Hou , Eric M.V. Hoek

{"title":"Sample preparation matters: Scanning electron microscopic characterization of polymeric membranes","authors":"Jishan Wu , Minhao Xiao , Javier A. Quezada-Renteria , Ziwei Hou , Eric M.V. Hoek","doi":"10.1016/j.memlet.2024.100073","DOIUrl":"10.1016/j.memlet.2024.100073","url":null,"abstract":"<div><p>This study systematically examines the influence of polymeric membrane sample preparation techniques on their morphologies and structures as revealed by scanning electron microscopy (SEM). We address the variability introduced by diverse preparation methods in research, which leads to subjective qualitative and quantitative SEM interpretations. Our investigation encompasses various preparation techniques, focusing on cryogenic sectioning—alongside SEM operational parameters including accelerating voltage and conductive sputter coating thickness. We demonstrate that surface morphology analysis via SEM is significantly affected by coating thickness and accelerating voltage, while cross-sectional images (typically, at much higher magnification) exhibit little difference in morphology. However, improper preparation can damage membranes, compromising cross-sectional imaging. We provide a detailed exploration of the cryogenic-sectioning and its effects on SEM image quality. Our findings indicate one's selection of preparation procedure can create significant biases in SEM analyses of microfiltration, ultrafiltration, and reverse osmosis polymeric membranes.</p></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 1","pages":"Article 100073"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772421224000072/pdfft?md5=8fdedf3c13a516df8f0f1fd037e0936b&pid=1-s2.0-S2772421224000072-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140281861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0