1
|
Park J, Choi W, Kim J. Wet cleaning of Ta-based extreme ultraviolet photomasks at room temperature. NANOTECHNOLOGY 2024; 35:205701. [PMID: 38330452 DOI: 10.1088/1361-6528/ad27ae] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 02/08/2024] [Indexed: 02/10/2024]
Abstract
Owing to the wavelength-dependent limits of the deep ultraviolet exposure process, the semiconductor industry introduced extreme ultraviolet (EUV) lithography operating at a 13.5 nm wavelength. Traditional photomasks employ pellicles for protection; however, EUV-specific pellicles are not widely applicable to commercial processes, requiring the development of a EUV photomask cleaning method. In this study, a wet cleaning method for Ta-based EUV photomasks at room temperature was systematically examined in terms of key parameters, including the pattern step height, surface topography, and particulate count, via atomic force microscopy and x-ray reflectivity. Post sulfuric acid-hydrogen peroxide mixture (SPM) treatment, the photomask exhibited a stable step height, indicating minimal pattern degradation. Additionally, discernible alterations in the surface roughness and a decrease in particle count were observed, further indicating to the effectiveness of SPM-mediated cleaning. Conversely, following standard clean-1 (SC-1) treatment, while the pattern step height remained relatively unchanged, a notable increase in surface irregularities and macroscopic particulates was observed, suggesting a suboptimal cleaning efficiency of the SC-1 solution despite its potential for pattern structure preservation. Our room temperature wet cleaning method efficiently reduces wear-out and successfully eliminates contaminants, potentially prolonging the EUV photomask's productivity and durability.
Collapse
Affiliation(s)
- Jehwan Park
- Department of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Woong Choi
- Department of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Jihyun Kim
- Department of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
| |
Collapse
|
2
|
Cottet J, Oshodi JO, Yebouet J, Leang A, Furst AL, Buie CR. Zeta potential characterization using commercial microfluidic chips. LAB ON A CHIP 2024; 24:234-243. [PMID: 38050677 DOI: 10.1039/d3lc00825h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
Surface charge is a critical feature of microbes that affects their interactions with other cells and their environment. Because bacterial surface charge is difficult to measure directly, it is typically indirectly inferred through zeta potential measurements. Existing tools to perform such characterization are either costly and ill-suited for non-spherical samples or rely on microfluidic techniques requiring expensive fabrication equipment or specialized facilities. Here, we report the application of commercially available PMMA microfluidic chips and open-source data analysis workflows for facile electrokinetic characterization of particles and cells after prior zeta potential measurement with a Zetasizer for calibration. Our workflows eliminate the need for microchannel fabrication, increase measurement reproducibility, and make zeta potential measurements more accessible. This novel methodology was tested with functionalized 1 μm and 2 μm polystyrene beads as well as Escherichia coli MG1655 strain. Measured zeta potentials for these samples were in agreement with literature values obtained by conventional measurement methods. Taken together, our data demonstrate the power of this workflow to broadly enable critical measurements of particle and bacterial zeta potential for numerous applications.
Collapse
Affiliation(s)
- Jonathan Cottet
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - Josephine O Oshodi
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Jesse Yebouet
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - Andrea Leang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - Ariel L Furst
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Cullen R Buie
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
| |
Collapse
|
3
|
Hester S, B Ferenz K, Adick A, Kakalias C, Mulac D, Azhdari S, Langer K. Triglyceride-filled albumin-based nanocapsules: A promising new system to avoid discarding poorly water-soluble drug candidates. Int J Pharm 2023; 646:123454. [PMID: 37776966 DOI: 10.1016/j.ijpharm.2023.123454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/21/2023] [Accepted: 09/27/2023] [Indexed: 10/02/2023]
Abstract
Even though current drug discovery provides a variety of potential drug candidates, many of those substances are difficult to formulate due to their poor water-solubility. To overcome this obstacle a technological formulation is crucial. Albumin-based nanocarriers are a possible intravenous delivery system which is already approved and commercially available. However, no universal carrier for poorly water-soluble substances is found yet. In the present study, new preparation processes for nanocapsules consisting of a medium-chain triglyceride (MCT) core and a human serum albumin (HSA) shell were developed. The nanocarrier system exhibits desirable physicochemical properties with a hydrodynamic diameter of 150 nm and a polydispersity index of 0.1. Furthermore, the nanocapsules were stable towards the addition of electrolytes and also in basic to neutral pH range. The nanocapsules were storage stable for at least 7 months at 4 °C and could also be lyophilized to reach an even longer shelf life of at least 21 months. In addition, the nanocapsule system showed no cytotoxicity in cell culture. The developed system represents a suitable carrier for a variety of different poorly water-soluble drug substances (e.g., fenofibrate, naproxen, indomethacin) showing a high potential for a universal formulation platform for further lipophilic active pharmaceutical ingredients (APIs).
Collapse
Affiliation(s)
- Sarah Hester
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstr. 48, 48149 Muenster, Germany.
| | - Katja B Ferenz
- Institute of Physiology, University of Duisburg-Essen, University Hospital Essen, Hufelandstr. 55, 45122 Essen, Germany.
| | - Annika Adick
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstr. 48, 48149 Muenster, Germany.
| | - Christos Kakalias
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstr. 48, 48149 Muenster, Germany.
| | - Dennis Mulac
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstr. 48, 48149 Muenster, Germany.
| | - Suna Azhdari
- Institute of Physical Chemistry, University of Muenster, Corrensstr. 28/30, 48149 Muenster, Germany.
| | - Klaus Langer
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstr. 48, 48149 Muenster, Germany.
| |
Collapse
|
4
|
Zhang R, Liu W, Luan Z, Xia Y, Wang Y, Hu X, Duraihem FZ, Xu X. Effects of the Electric Double Layer Characteristic and Electroosmotic Regulation on the Tribological Performance of Water-Based Cutting Fluids. MICROMACHINES 2023; 14:2029. [PMID: 38004886 PMCID: PMC10673424 DOI: 10.3390/mi14112029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 10/25/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023]
Abstract
The electroosmosis effect is a complement to the theory of the traditional capillary penetration of cutting fluid. In this study, based on the electric double layer (EDL) characteristics at friction material/solution interfaces, the influences of additives and their concentrations on capillary electroosmosis were investigated, and a water-based cutting-fluid formulation with consideration to the electroosmosis effect was developed. The lubrication performance levels of cutting fluids were investigated by a four-ball tribometer. The results show that the EDL is compressed with increasing ionic concentration, which suppresses the electroosmotic flow (EOF). The specific adsorption of OH- ions or the dissociation of surface groups is promoted as pH rises, increasing the absolute zeta potential and EOF. The polyethylene glycol (PEG) additive adsorbed to the friction material surface can keep the shear plane away from the solid surface, reducing the absolute zeta potential and EOF. The electroosmotic performance of cutting fluid can be improved by compounding additives with different electroosmotic performance functions. Furthermore, electroosmotic regulators can adjust the zeta potential by the electrostatic adsorption mechanism, affecting the penetration performance of cutting fluid in the capillary zone at the friction interface. The improvement in the tribological performance of cutting fluid developed with consideration given to the electroosmosis effect is attributed to the enhancement of the penetration ability of the cutting fluid and the formation of more abundant amounts of lubricating film at the interface.
Collapse
Affiliation(s)
- Ruochong Zhang
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; (R.Z.); (W.L.); (Z.L.); (Y.X.); (Y.W.); (X.H.)
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China
| | - Wenshuai Liu
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; (R.Z.); (W.L.); (Z.L.); (Y.X.); (Y.W.); (X.H.)
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China
| | - Zhiqiang Luan
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; (R.Z.); (W.L.); (Z.L.); (Y.X.); (Y.W.); (X.H.)
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China
| | - Yu Xia
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; (R.Z.); (W.L.); (Z.L.); (Y.X.); (Y.W.); (X.H.)
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China
| | - Ying Wang
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; (R.Z.); (W.L.); (Z.L.); (Y.X.); (Y.W.); (X.H.)
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China
| | - Xiaodong Hu
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; (R.Z.); (W.L.); (Z.L.); (Y.X.); (Y.W.); (X.H.)
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China
| | - Faisal Z. Duraihem
- Department of Mathematics, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Xuefeng Xu
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; (R.Z.); (W.L.); (Z.L.); (Y.X.); (Y.W.); (X.H.)
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China
| |
Collapse
|
5
|
García-Abad L, Soriano-Jerez Y, Cerón-García MDC, Muñoz-Bonilla A, Fernández-García M, García-Camacho F, Molina-Grima E. Adsorption Analysis of Exopolymeric Substances as a Tool for the Materials Selection of Photobioreactors Manufacture. Int J Mol Sci 2022; 23:ijms232213924. [PMID: 36430401 PMCID: PMC9697444 DOI: 10.3390/ijms232213924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/05/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
An improved method that allows the robust characterization of surfaces is necessary to accurately predict the biofouling formation on construction materials of photobioreactors (PBR). Exopolymeric substances (EPS), such as proteins and polysaccharides, have been demonstrated to present a similar behavior to cells in terms of surface adhesion. In this work, these EPS were used to optimize parameters, such as EPS concentration or adsorption time, to evaluate accurately the adsorption capacity of surfaces and, with it, predict the biofouling formation in contact with microalgae cultures. Once the method was optimized, the characterization of seven commercial polymeric surfaces was submitted to different abrasive particles sizes, which modified the roughness of the samples, as well as protein and polysaccharide lawns, which were prepared and carried out in order to evaluate the characteristics of these substances. The characterization consisted of the determination of surface free energy, water adhesion tension, and critical tension determined from the measurement of the contact angle, roughness, surface zeta potential, and the EPS adhesion capacity of each material. This will be useful to understand the behavior of the surface in the function of its characteristics and the interaction with the solutions of EPS, concluding that the hydrophobic and smooth surfaces present good anti-biofouling characteristics.
Collapse
Affiliation(s)
- Lucía García-Abad
- Chemical Engineering Department, University of Almería, 04120 Almería, Spain
- Research Center in Agrifood Biotechnology (CIAMBITAL), University of Almería, 04120 Almería, Spain
| | - Yolanda Soriano-Jerez
- Chemical Engineering Department, University of Almería, 04120 Almería, Spain
- Research Center in Agrifood Biotechnology (CIAMBITAL), University of Almería, 04120 Almería, Spain
| | - María del Carmen Cerón-García
- Chemical Engineering Department, University of Almería, 04120 Almería, Spain
- Research Center in Agrifood Biotechnology (CIAMBITAL), University of Almería, 04120 Almería, Spain
- Correspondence: (M.d.C.C.-G.); (M.F.-G.)
| | | | - Marta Fernández-García
- Institute of Polymer Science and Technology (ICTP-CSIC), 28006 Madrid, Spain
- Correspondence: (M.d.C.C.-G.); (M.F.-G.)
| | - Francisco García-Camacho
- Chemical Engineering Department, University of Almería, 04120 Almería, Spain
- Research Center in Agrifood Biotechnology (CIAMBITAL), University of Almería, 04120 Almería, Spain
| | - Emilio Molina-Grima
- Chemical Engineering Department, University of Almería, 04120 Almería, Spain
- Research Center in Agrifood Biotechnology (CIAMBITAL), University of Almería, 04120 Almería, Spain
| |
Collapse
|
6
|
Kobayashi S, Sugasaki A, Yamamoto Y, Shigenoi Y, Udaka A, Yamamoto A, Tanaka M. Enrichment of Cancer Cells Based on Antibody-Free Selective Cell Adhesion. ACS Biomater Sci Eng 2022; 8:4547-4556. [PMID: 36153975 DOI: 10.1021/acsbiomaterials.2c00662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Blood-compatible and cell-adhering polymer materials are extremely useful for regenerative medicine and disease diagnosis. (Meth)acryl polymers with high hydrophilicity have been widely used in industries, and attempts to apply these polymers in the medical field are frequently reported. We focused on crosslinked polymer films prepared using bifunctional monomers, which are widely used as coating materials, and attempted to alter the cell adhesion behavior while maintaining blood compatibility by changing the chemical structure of the crosslinker. Four bifunctional monomers were studied, three of which were found to be blood-compatible polymers and to suppress platelet adhesion. The adhesion behavior of cancer cells to polymer films varied; moreover, the cancer model cells MCF-7 [EpCAM(+)] and MDA-MB-231 [EpCAM (-)], with different expression levels of epithelial cell adhesion molecule (EpCAM), showed distinct adhesion behavior for each material. We suggest that a combination of these materials has the potential to selectively capture and enrich highly metastatic cancer cells.
Collapse
Affiliation(s)
- Shingo Kobayashi
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka, Nishi-ku, Fukuoka819-0395, Japan
| | - Atsushi Sugasaki
- Synthetic Organic Chemistry Laboratories, FUJIFILM Corporation, 4000 Kawashiri, Yoshida-cho, Haibara-gun, Shizuoka421-0396, Japan
| | - Yosuke Yamamoto
- Synthetic Organic Chemistry Laboratories, FUJIFILM Corporation, 577 Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa258-0022, Japan
| | - Yuta Shigenoi
- Electronic Materials Research Laboratories, FUJIFILM Corporation, 4000 Kawashiri, Yoshida-cho, Haibara-gun, Shizuoka421-0396, Japan
| | - Airi Udaka
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka, Nishi-ku, Fukuoka819-0395, Japan
| | - Aki Yamamoto
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka, Nishi-ku, Fukuoka819-0395, Japan
| | - Masaru Tanaka
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka, Nishi-ku, Fukuoka819-0395, Japan
| |
Collapse
|
7
|
Park H, Wiesing M, Zimmermann P, Janke A, Schwarz S, Nagel J. Laser-Assisted Direct Grafting of Poly(ethyleneimine) on Poly(methyl methacrylate). Polymers (Basel) 2022; 14:polym14102041. [PMID: 35631923 PMCID: PMC9144553 DOI: 10.3390/polym14102041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 05/11/2022] [Accepted: 05/14/2022] [Indexed: 02/04/2023] Open
Abstract
Demand for direct chemical modification of functional material on a surface is increasing in various fields. A new approach for a functionalized surface is investigated by applying a conventional laser in order to generate chemical activation by photothermal energy. Poly(ethyleneimine) (PEI), with a high density of amino groups, is chemically grafted on poly(methyl methacrylate) (PMMA) by irradiation of a CO2 laser (10.6 μm). Laser parameters such as power, scan rate, and focal length are observed to play an important role in order to introduce effective photothermal energy for the chemical reaction between PEI and PMMA. By optimization of laser parameters, the amide compound is produced as a result of the reaction of amine from PEI and the ester of PMMA successfully. The PMMA surface modified with PEI is analyzed by XPS and TOF-SIMS to identify the functional groups. Furthermore, the surface is characterized in terms of wettability, adhesion force, and surface charge for various applications. Finally, reaction with dye and metal on the amine-terminated PMMA shows promising results in supplying a selective and reliable functional substrate.
Collapse
Affiliation(s)
- Hyeyoung Park
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany; (H.P.); (P.Z.); (A.J.); (S.S.)
| | - Martin Wiesing
- Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung (IFAM), Wiener Straße 12, 28359 Bremen, Germany;
| | - Philipp Zimmermann
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany; (H.P.); (P.Z.); (A.J.); (S.S.)
| | - Andreas Janke
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany; (H.P.); (P.Z.); (A.J.); (S.S.)
| | - Simona Schwarz
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany; (H.P.); (P.Z.); (A.J.); (S.S.)
| | - Jürgen Nagel
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany; (H.P.); (P.Z.); (A.J.); (S.S.)
- Correspondence:
| |
Collapse
|
8
|
Wang Z, Yu H, Liyanage A, Qiu J, Thushara D, Bao B, Zhao S. Collective diffusion of charged nanoparticles in microchannel under electric field. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
9
|
Erol I, Deveci T. Novel methacrylate copolymers functionalized with fluoroarylamide; copolymerization kinetics, thermal stability and antimicrobial properties. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2021; 32:1810-1834. [PMID: 34078233 DOI: 10.1080/09205063.2021.1938858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In the first step of this study, 2-oxo-2-[(2,4,6-trifluorophenyl)amino]ethyl-2-methylprop-2-enoate(OTFAMA) monomer was synthesized and characterized. Then, a series copolymers were obtained by free-radical copolymerization method of OTFAMA and glycidyl methacrylate (GMA), which is a commercial monomer at 65 °C in 1,4-dioxane solvent. Structural characterizations of synthesized monomer and copolymers were carried out using FTIR, 1H-13C-NMR instruments. The composition of the copolymers was estimated by elemental analysis. The reactivity ratios (r1 and r2) were obtained from the various linear graphical methods. The values of r1 (OTFAMA) = 0.33 and r2 (GMA) = 0.45 were found from the same graphical methods. The thermal behaviors of all the polymers have been investigated using the differential scanning calorimetry (DSC) and the thermogravimetric analysis (TGA). A kinetic study of the thermal decompostion of copolymers was investigated using thermogravimetric analyzer with non-isothermal methods selected for analyzing solid-state kinetics data. The average activation energy values were calculated via Kissinger and Ozawa models in a period of α = 0.10-0.80. Photo stability of the copolymers was investigated. Also, the biological activity of the copolymers against different bacterial and fungal species has been investigated.
Collapse
Affiliation(s)
- Ibrahim Erol
- Faculty of Science and Arts, Department of Chemistry, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Turker Deveci
- Faculty of Science and Arts, Department of Chemistry, Afyon Kocatepe University, Afyonkarahisar, Turkey
| |
Collapse
|
10
|
Schwaminger SP, Schwarzenberger K, Gatzemeier J, Lei Z, Eckert K. Magnetically Induced Aggregation of Iron Oxide Nanoparticles for Carrier Flotation Strategies. ACS APPLIED MATERIALS & INTERFACES 2021; 13:20830-20844. [PMID: 33884871 DOI: 10.1021/acsami.1c02919] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
On the nanoscale, iron oxides can be used for multiple applications ranging from medical treatment to biotechnology. We aimed to utilize the specific properties of these nanoparticles for new process concepts in flotation. Magnetic nanoparticles were synthesized by alkaline coprecipitation, leading to a primary particle size of 9 nm, and coated with oleate. The nanomaterial was characterized for its superparamagnetism and its colloidal stability at different ionic strengths, with and without an external magnetic field. The nanomaterial was used for model experiments on magnetic carrier flotation of microplastic particles, based on magnetically induced heteroagglomeration. We were able to demonstrate the magnetically induced aggregation of the nanoparticles which allows for new flotation strategies. Since the nanomaterial has zero remanent magnetization, the agglomeration is reversible which facilitates the process control. Magnetic carrier flotation based on iron oxide nanoparticles can pave the way to promising new recycling processes for microplastic wastes.
Collapse
Affiliation(s)
- Sebastian P Schwaminger
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, Germany
| | - Karin Schwarzenberger
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Institute of Process Engineering and Environmental Technology, TU Dresden, 01062 Dresden, Germany
| | - Jacqueline Gatzemeier
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, Germany
| | - Zhe Lei
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Institute of Process Engineering and Environmental Technology, TU Dresden, 01062 Dresden, Germany
| | - Kerstin Eckert
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Institute of Process Engineering and Environmental Technology, TU Dresden, 01062 Dresden, Germany
| |
Collapse
|
11
|
Çifci C, Bayraktar MR, Erol İ, Enginar H. Synthesis of poly(vinyl alcohol-co-ethylene)/cellulose composite membranes and their application in wastewater treatment. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2020. [DOI: 10.1080/16583655.2020.1832748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Cemal Çifci
- Faculty of Engineering, Department of Chemical Engineering, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Muhammed Raşit Bayraktar
- Faculty of Engineering, Department of Chemical Engineering, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - İbrahim Erol
- Faculty of Science and Arts, Department of Chemistry, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Hüseyin Enginar
- Faculty of Science and Arts, Department of Chemistry, Afyon Kocatepe University, Afyonkarahisar, Turkey
| |
Collapse
|
12
|
Pariente JA, Caselli N, Pecharromán C, Blanco A, López C. Vacancies in Self-Assembled Crystals: An Archetype for Clusters Statistics at the Nanoscale. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002735. [PMID: 32970382 DOI: 10.1002/smll.202002735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/03/2020] [Indexed: 06/11/2023]
Abstract
Complex systems involving networks have attracted strong multidisciplinary attention since they are predicted to sustain fascinating phase transitions in the proximity of the percolation threshold. Developing stable and compact archetypes that allow one to experimentally study physical properties around the percolation threshold remains a major challenge. In nanoscale systems, this achievement is rare since it is tied to the ability to control the intentional disorder and perform a vast statistical analysis of cluster configurations. Here, a self-assembly method to fabricate perfectly ordered structures where random defects can be introduced is presented. Building binary crystals from two types of dielectric nanospheres and selectively removing one of them creates vacancies at random lattice positions that form a complex network of clusters. Vacancy content can be easily controlled and raised even beyond the percolation threshold. In these structures, the distribution of cluster sizes as a function of vacancy density is analyzed. For moderate concentrations, it is found to be homogeneous throughout the structure and in good agreement with the assumption of a random vacancy distribution.
Collapse
Affiliation(s)
- Jose Angel Pariente
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC) Calle Sor Juana Inés de la Cruz 3, Madrid, E-28049, Spain
| | - Niccolò Caselli
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC) Calle Sor Juana Inés de la Cruz 3, Madrid, E-28049, Spain
| | - Carlos Pecharromán
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC) Calle Sor Juana Inés de la Cruz 3, Madrid, E-28049, Spain
| | - Alvaro Blanco
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC) Calle Sor Juana Inés de la Cruz 3, Madrid, E-28049, Spain
| | - Cefe López
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC) Calle Sor Juana Inés de la Cruz 3, Madrid, E-28049, Spain
- Donostia International Physics Centre, Manuel Lardizabal Ibilbidea, 4, Donostia-San Sebastian, Gipuzkoa, 20018, Spain
| |
Collapse
|
13
|
Myalitsin A, Ghosh S, Urashima SH, Nihonyanagi S, Yamaguchi S, Aoki T, Tahara T. Structure of water and polymer at the buried polymer/water interface unveiled using heterodyne-detected vibrational sum frequency generation. Phys Chem Chem Phys 2020; 22:16527-16531. [DOI: 10.1039/d0cp02618b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterodyne-detected vibrational sum frequency generation reveals the molecular-level structure of the polymer/water interface that is different from what has been argued.
Collapse
Affiliation(s)
- Anton Myalitsin
- Molecular Spectroscopy Laboratory
- RIKEN
- Saitama 351-0198
- Japan
- Nissan ARC, Ltd
| | - Sanat Ghosh
- Molecular Spectroscopy Laboratory
- RIKEN
- Saitama 351-0198
- Japan
| | | | - Satoshi Nihonyanagi
- Molecular Spectroscopy Laboratory
- RIKEN
- Saitama 351-0198
- Japan
- Ultrafast Spectroscopy Research Team
| | - Shoichi Yamaguchi
- Department of Applied Chemistry
- Graduate School of Science and Technology
- Saitama University
- Saitama 338-8570
- Japan
| | - Takashi Aoki
- Department of Biobased Materials Science
- Graduate School of Science and Technology
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Tahei Tahara
- Molecular Spectroscopy Laboratory
- RIKEN
- Saitama 351-0198
- Japan
- Ultrafast Spectroscopy Research Team
| |
Collapse
|
14
|
Das SS, Pedireddi VM, Bandopadhyay A, Saha P, Chakraborty S. Electrical Power Generation from Wet Textile Mediated by Spontaneous Nanoscale Evaporation. NANO LETTERS 2019; 19:7191-7200. [PMID: 31507187 DOI: 10.1021/acs.nanolett.9b02783] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Developing low-weight, frugal, and sustainable power sources for resource-limited settings appears to be a challenging proposition for the advancement of next-generation sensing devices and beyond. Here, we report the use of centimeter-sized simple wet fabric pieces for electrical power generation by deploying the interplay of a spontaneously induced ionic motion across fabric nanopores due to capillary action and simultaneous water evaporation by drawing thermal energy from the ambient. Unlike other reported devices with similar functionalities, our arrangement does not necessitate any input mechanical energy or complex topographical structures to be embedded in the substrate. A single device is capable of generating a sustainable open circuit potential up to ∼700 mV, which is further scaled up to ∼12 V with small-scale multiplexing (i.e., deploying around 40 numbers of fabric channels simultaneously). The device is able to charge a commercial supercapacitor of ∼0.1 F which can power a white light-emitting diode for more than 1 h. This suffices in establishing an inherent capability of functionalizing self-powered electronic devices and also to be potentially harnessed for enhanced power generation with feasible up-scaling.
Collapse
Affiliation(s)
- Sankha Shuvra Das
- Department of Mechanical Engineering , Indian Institute of Technology Kharagpur , Kharagpur , India 721302
| | - Vinay Manaswi Pedireddi
- Department of Mechanical Engineering , Indian Institute of Technology Kharagpur , Kharagpur , India 721302
| | - Aditya Bandopadhyay
- Department of Mechanical Engineering , Indian Institute of Technology Kharagpur , Kharagpur , India 721302
| | - Partha Saha
- Department of Mechanical Engineering , Indian Institute of Technology Kharagpur , Kharagpur , India 721302
| | - Suman Chakraborty
- Department of Mechanical Engineering , Indian Institute of Technology Kharagpur , Kharagpur , India 721302
| |
Collapse
|
15
|
Shi T, Chen Z, Xu J, Chen Q. Research on factors of influencing the preparation of 2D/3D poly(methyl methacrylate) (PMMA) colloidal crystal films at the air/water interface. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1627218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Tingting Shi
- School of Chemistry and Molecular Engineering, East China Normal University , Shanghai , China
| | - Zhe Chen
- School of Chemistry and Molecular Engineering, East China Normal University , Shanghai , China
| | - Jiaqiong Xu
- School of Chemistry and Molecular Engineering, East China Normal University , Shanghai , China
| | - Qiming Chen
- School of Chemistry and Molecular Engineering, East China Normal University , Shanghai , China
| |
Collapse
|
16
|
Miryahyaei S, Olinga K, Abdul Muthalib FA, Das T, Ab Aziz MS, Othman M, Baudez JC, Batstone D, Eshtiaghi N. Impact of rheological properties of substrate on anaerobic digestion and digestate dewaterability: New insights through rheological and physico-chemical interaction. WATER RESEARCH 2019; 150:56-67. [PMID: 30508714 DOI: 10.1016/j.watres.2018.11.049] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/17/2018] [Accepted: 11/17/2018] [Indexed: 06/09/2023]
Abstract
Mesophilic batch anaerobic digesters fed by different substrates were set up to identify the role of substrate rheology in anaerobic digestion performance while operating below the toxic level. Five substrates of different rheological behaviour but at the same amount of organic matters were prepared by addition of different amount of an inert material (0, 0.03, 0.07, 0.11, and 0.20 g) per g of waste activated sludge (WAS). To gain a comprehensive insight, the interactive relationship between substrate rheology, physico-chemical properties and biogas production as well as digestate dewaterability was investigated. The results proved that better access of microorganisms to organic matters improved the digester performance and led to 19.29% and 12.5% increase in biogas yield and VS removal efficiency, respectively. Moreover, the statistical analysis showed that consistency index and loss modulus of sludge could be employed as promising indications for biogas yield while yield stress could predict dewaterability of digestate as far as the other physico-chemical properties remained unchanged. During digestion measurement of consistency index and loss modulus of digestate could be performed as a reliable tool to monitor biogas production.
Collapse
Affiliation(s)
- S Miryahyaei
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - K Olinga
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - F A Abdul Muthalib
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - T Das
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - M S Ab Aziz
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - M Othman
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - J C Baudez
- Luxembourg Institute of Science and Technology, Environmental Research and Innovation Department, Belvaux, Luxembourg
| | - D Batstone
- Advanced Water Management Centre, The University of Queensland, Brisbane, Australia
| | - N Eshtiaghi
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia.
| |
Collapse
|
17
|
Botin D, Wenzl J, Niu R, Palberg T. Colloidal electro-phoresis in the presence of symmetric and asymmetric electro-osmotic flow. SOFT MATTER 2018; 14:8191-8204. [PMID: 30259053 DOI: 10.1039/c8sm00934a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We characterize the electro-phoretic motion of charged sphere suspensions in the presence of substantial electro-osmotic flow using a recently introduced small angle super-heterodyne dynamic light scattering instrument (ISASH-LDV). Operation in integral mode gives access to the particle velocity distribution over the complete cell cross-section. Obtained Doppler spectra are evaluated for electro-phoretic mobility, wall electro-osmotic mobility and particle diffusion coefficient. Simultaneous measurements of differing electro-osmotic mobilities leading to asymmetric solvent flow are demonstrated in a custom made electro-kinetic cell fitting standard microscopy slides as exchangeable sidewalls. The scope and range of our approach are discussed demonstrating the possibility of an internal calibration standard and using the simultaneously measured electro-kinetic mobilities in the interpretation of a microfluidic pumping experiment involving an inhomogeneous electric field and a complex solvent flow pattern.
Collapse
Affiliation(s)
- Denis Botin
- Institute of Physics, Johannes Gutenberg University, D-55099 Mainz, Germany.
| | - Jennifer Wenzl
- Institute of Physics, Johannes Gutenberg University, D-55099 Mainz, Germany.
| | - Ran Niu
- Institute of Physics, Johannes Gutenberg University, D-55099 Mainz, Germany.
| | - Thomas Palberg
- Institute of Physics, Johannes Gutenberg University, D-55099 Mainz, Germany.
| |
Collapse
|
18
|
Khademi M, Barz DPJ. Dielectric relaxation spectroscopy of aqueous micellar electrolyte solutions: A novel application to infer Dukhin number and zeta potential of a micelle. Electrophoresis 2018; 40:710-719. [DOI: 10.1002/elps.201800293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/14/2018] [Accepted: 08/29/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Mahmoud Khademi
- Department of Chemical Engineering; Queen's University; Kingston Ontario Canada
| | - Dominik P. J. Barz
- Department of Chemical Engineering; Queen's University; Kingston Ontario Canada
| |
Collapse
|
19
|
Shen BH, Armstrong BL, Doucet M, Heroux L, Browning JF, Agamalian M, Tenhaeff WE, Veith GM. Shear Thickening Electrolyte Built from Sterically Stabilized Colloidal Particles. ACS APPLIED MATERIALS & INTERFACES 2018; 10:9424-9434. [PMID: 29499109 DOI: 10.1021/acsami.7b19441] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present a method to prepare shear thickening electrolytes consisting of silica nanoparticles in conventional liquid electrolytes with limited flocculation. These electrolytes rapidly and reversibly stiffen to solidlike behaviors in the presence of external shear or high impact, which is promising for improved lithium ion battery safety, especially in electric vehicles. However, in initial chemistries the silica nanoparticles aggregate and/or sediment in solution over time. Here, we demonstrate steric stabilization of silica colloids in conventional liquid electrolyte via surface-tethered PMMA brushes, synthesized via surface-initiated atom transfer radical polymerization. The PMMA increases the magnitude of the shear thickening response, compared to the uncoated particles, from 0.311 to 2.25 Pa s. Ultrasmall-angle neutron scattering revealed a reduction in aggregation of PMMA-coated silica nanoparticles compared to bare silica nanoparticles in solution under shear and at rest, suggesting good stabilization. Conductivity tests of shear thickening electrolytes (30 wt % solids in electrolyte) at rest were performed with interdigitated electrodes positioned near the meniscus of electrolytes over the course of 24 h to track supernatant formation. Conductivity of electrolytes with bare silica increased from 10.1 to 11.6 mS cm-1 over 24 h due to flocculation. In contrast, conductivity of electrolytes with PMMA-coated silica remained stable at 6.1 mS cm-1 over the same time period, suggesting good colloid stability.
Collapse
Affiliation(s)
- Brian H Shen
- Department of Chemical Engineering , University of Rochester , Rochester , New York 14627 , United States
| | | | | | | | | | | | - Wyatt E Tenhaeff
- Department of Chemical Engineering , University of Rochester , Rochester , New York 14627 , United States
| | | |
Collapse
|
20
|
Plett T, Thai ML, Cai J, Vlassiouk I, Penner RM, Siwy ZS. Ion transport in gel and gel-liquid systems for LiClO 4-doped PMMA at the meso- and nanoscales. NANOSCALE 2017; 9:16232-16243. [PMID: 29043361 DOI: 10.1039/c7nr06719d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Solid and gel electrolytes offer significant advantages for cycle stability and longevity in energy storage technologies. These advantages come with trade-offs such as reduced conductivity and ion mobility, which can impact power density in storage devices even at the nanoscale. Here we propose experiments aimed at exploring the ion transport properties of a hybrid electrolyte system of liquid and gel electrolytes with meso and nanoscale components. We focus on single pore systems featuring LiClO4-propylene carbonate and LiClO4-PMMA gel, which are model electrolytes for energy storage devices. We identified conditions at which the systems considered featured rectifying current-voltage curves, indicating a preferential direction of ion transport. The presented ion current rectification suggests different mechanisms arising from the unique hybrid system: (i) PMMA structure imposing selectivity in fully immersed systems and (ii) ionic selectivity linked to ion sourcing from media of different ionic mobility. These mechanisms were observed to interplay with ion transport properties linked to nanopore structure i.e. cylindrical and conical.
Collapse
Affiliation(s)
- Timothy Plett
- Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
| | | | | | | | | | | |
Collapse
|
21
|
Khademi M, Wang W, Reitinger W, Barz DPJ. Zeta Potential of Poly(methyl methacrylate) (PMMA) in Contact with Aqueous Electrolyte-Surfactant Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10473-10482. [PMID: 28915350 DOI: 10.1021/acs.langmuir.7b02487] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The addition of surfactants can considerably impact the electrical characteristics of an interface, and the zeta potential measurement is the standard method for its characterization. In this article, a comprehensive study of the zeta potential of poly(methyl methacrylate) (PMMA) in contact with aqueous solutions containing an anionic, a cationic, or a zwitterionic surfactant at different pH and ionic strength values is conducted. Electrophoretic mobilities are inferred from electrophoretic light scattering measurements of the particulate PMMA. These values can be converted into zeta potentials using permittivity and viscosity measurements of the continuous phase. Different behaviors are observed for each surfactant type, which can be explained with the various adsorption mechanisms on PMMA. For the anionic surfactant, the absolute zeta potential value below the critical micelle concentration (CMC) increases with the concentration, while it becomes rather constant around the CMC. At concentrations above the CMC, the absolute zeta potential increases again. We propose that hydrophobic-based adsorption and, at higher concentrations, the competing micellization process drive this behavior. The addition of cationic surfactant results in an isoelectric point below the CMC where the negative surface charge is neutralized by a layer of adsorbed cationic surfactant. At concentrations near the CMC, the positive zeta potential is rather constant. In this case, we propose that electrostatic interactions combined with hydrophobic adsorption are responsible for the observed behavior. The zeta potential in the presence of zwitterionic surfactant is influenced by the adsorption, because of hydrophobic interactions between the surfactant tail and the PMMA surface. However, there is less influence, compared to the ionic surfactants. For all three surfactant types, the zeta potential changes to more-negative or less-positive values for alkaline pH values, because of hydroxide adsorption. An increase of the ionic strength decreases the absolute value of the zeta potential, because of the shielding effects.
Collapse
Affiliation(s)
- Mahmoud Khademi
- Department of Chemical Engineering, Queen's University , Kingston, Ontario, Canada K7L 3N6
| | - Wuchun Wang
- Department of Chemical Engineering, Queen's University , Kingston, Ontario, Canada K7L 3N6
| | - Wolfgang Reitinger
- Department of Chemical Engineering, Queen's University , Kingston, Ontario, Canada K7L 3N6
| | - Dominik P J Barz
- Department of Chemical Engineering, Queen's University , Kingston, Ontario, Canada K7L 3N6
| |
Collapse
|
22
|
Erol I, Devrim DN, Ciftci H, Ersoy B, Cigerci IH. Novel functional copolymers based on glycidyl methacrylate: Synthesis, characterization, and polymerization kinetics. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2017. [DOI: 10.1080/10601325.2017.1320747] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ibrahim Erol
- Department of Chemistry, Arts and Science Faculty, Afyon Kocatepe University, Afyon, Turkey
| | - Derya Nimet Devrim
- Department of Chemistry, Arts and Science Faculty, Afyon Kocatepe University, Afyon, Turkey
| | - Hakan Ciftci
- Department of Mining Engineering, Engineering Faculty, Afyon Kocatepe University, Afyon, Turkey
| | - Bahri Ersoy
- Department of Mining Engineering, Engineering Faculty, Afyon Kocatepe University, Afyon, Turkey
| | - I. Hakkı Cigerci
- Department of Molecular Biology and Genetics, Arts and Science Faculty, Afyon Kocatepe University, Afyon, Turkey
| |
Collapse
|
23
|
Brzozowska AM, Maassen S, Goh Zhi Rong R, Benke PI, Lim CS, Marzinelli EM, Jańczewski D, Teo SLM, Vancso GJ. Effect of Variations in Micropatterns and Surface Modulus on Marine Fouling of Engineering Polymers. ACS APPLIED MATERIALS & INTERFACES 2017; 9:17508-17516. [PMID: 28481498 PMCID: PMC5445506 DOI: 10.1021/acsami.6b14262] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We report on the marine fouling and fouling release effects caused by variations of surface mechanical properties and microtopography of engineering polymers. Polymeric materials were covered with hierarchical micromolded topographical patterns inspired by the shell of the marine decapod crab Myomenippe hardwickii. These micropatterned surfaces were deployed in field static immersion tests. PDMS, polyurethane, and PMMA surfaces with higher elastic modulus and hardness were found to accumulate more fouling and exhibited poor fouling release properties. The results indicate interplay between surface mechanical properties and microtopography on antifouling performance.
Collapse
Affiliation(s)
- Agata Maria Brzozowska
- Institute of Materials
Research and Engineering, Agency for Science,
Technology and Research, 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
| | - Stan Maassen
- Institute of Materials
Research and Engineering, Agency for Science,
Technology and Research, 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
- Faculty of Science
and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands
| | - Rubayn Goh Zhi Rong
- Institute of Materials
Research and Engineering, Agency for Science,
Technology and Research, 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Peter Imre Benke
- Singapore
Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, 60 Nanyang Drive, 637551 Singapore
- Environmental
Research Institute, National University
of Singapore, 21 Lower
Kent Ridge Road, 119077 Singapore
| | - Chin-Sing Lim
- St
John’s Island National Marine Laboratory, Tropical Marine Science
Institute, National University of Singapore, 18 Kent Ridge Road, 119227 Singapore
| | - Ezequiel M. Marzinelli
- Centre for Marine Bio-Innovation, School
of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia
- Sydney Institute of Marine Science, 19 Chowder Bay Rd, Mosman, NSW 2088, Australia
| | - Dominik Jańczewski
- Institute of Materials
Research and Engineering, Agency for Science,
Technology and Research, 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
- Laboratory of Technological
Processes, Faculty of Chemistry, Warsaw
University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- E-mail: . Tel: +48 22 234 5583. Fax: +48 22 234 5504
| | - Serena Lay-Ming Teo
- St
John’s Island National Marine Laboratory, Tropical Marine Science
Institute, National University of Singapore, 18 Kent Ridge Road, 119227 Singapore
- E-mail: . Tel: +65 6774 9887. Fax: +65 6776 1455
| | - G. Julius Vancso
- Institute of Chemical
and Engineering Sciences, Agency for Science,
Technology and Research, 1 Pesek Road, 627833 Singapore
- MESA+ Institute for Nanotechnology, Materials Science
and Technology of Polymers, University of
Twente, 7500 AE Enschede, The Netherlands
- E-mail: . Tel.: +31 53 489 2974. Fax: +31 53 489 3823
| |
Collapse
|
24
|
Niu R, Botin D, Weber J, Reinmüller A, Palberg T. Assembly and Speed in Ion-Exchange-Based Modular Phoretic Microswimmers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3450-3457. [PMID: 28346787 DOI: 10.1021/acs.langmuir.7b00288] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report an experimental study on ion-exchange-based modular microswimmers in low-salt water. Cationic ion-exchange particles and passive cargo particles assemble into self-propelling complexes, showing self-propulsion at speeds of several micrometers per second over extended distances and times. We quantify the assembly and speed of the complexes for different combinations of ion-exchange particles and cargo particles, substrate types, salt types and concentrations, and cell geometries. Irrespective of the experimental boundary conditions, we observe a regular development of the assembly shape with increasing number of cargo. Moreover, the swimming speed increases stepwise upon increasing the number of cargo and then saturates at a maximum speed, indicating the active role of cargo in modular swimming. We propose a geometric model of self-assembly to describe the experimental observations in a qualitative way. Our study also provides some constraints for future theoretical modeling and simulation.
Collapse
Affiliation(s)
- Ran Niu
- Institut für Physik, Johannes Gutenberg-Universtät Mainz , Staudingerweg 7, 55128 Mainz, Germany
| | - Denis Botin
- Institut für Physik, Johannes Gutenberg-Universtät Mainz , Staudingerweg 7, 55128 Mainz, Germany
| | - Julian Weber
- Institut für Physik, Johannes Gutenberg-Universtät Mainz , Staudingerweg 7, 55128 Mainz, Germany
| | - Alexander Reinmüller
- Institut für Physik, Johannes Gutenberg-Universtät Mainz , Staudingerweg 7, 55128 Mainz, Germany
| | - Thomas Palberg
- Institut für Physik, Johannes Gutenberg-Universtät Mainz , Staudingerweg 7, 55128 Mainz, Germany
| |
Collapse
|
25
|
Radzevicius P, Steponaviciute M, Krivorotova T, Makuska R. Double thermoresponsive pentablock copolymers: synthesis by one-pot RAFT polymerization and self-assembly in aqueous solutions. Polym Chem 2017. [DOI: 10.1039/c7py01546a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Pentablock copolymers synthesized by one-pot successive RAFT polymerization are double thermoresponsive and exhibit block sequence dependent aggregation in aqueous solutions.
Collapse
Affiliation(s)
| | | | | | - Ricardas Makuska
- Department of Polymer Chemistry
- Vilnius University
- LT-03225 Vilnius
- Lithuania
| |
Collapse
|
26
|
Bauer KC, Schermeyer MT, Seidel J, Hubbuch J. Impact of polymer surface characteristics on the microrheological measurement quality of protein solutions – A tracer particle screening. Int J Pharm 2016; 505:246-54. [DOI: 10.1016/j.ijpharm.2016.03.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 03/23/2016] [Accepted: 03/24/2016] [Indexed: 11/15/2022]
|
27
|
Maçon ALB, Li S, Chung JJ, Nommeots-Nomm A, Solanki AK, Stevens MM, Jones JR. Ductile silica/methacrylate hybrids for bone regeneration. J Mater Chem B 2016; 4:6032-6042. [DOI: 10.1039/c6tb00968a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Hybrids consisting of co-networks of high cross-linking density polymethacrylate and silica (class II hybrid) were synthesised as a potential new generation of scaffold materials.
Collapse
Affiliation(s)
| | - Siwei Li
- Department of Materials Imperial College London
- London
- UK
| | | | | | | | - Molly M. Stevens
- Department of Materials Imperial College London
- London
- UK
- Institute of Biomedical Engineering Imperial College London
- London
| | | |
Collapse
|
28
|
Charge-based separation of proteins and peptides by electrically induced dynamic pH profiles. J Chromatogr A 2016; 1431:166-175. [DOI: 10.1016/j.chroma.2015.12.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 12/27/2015] [Accepted: 12/28/2015] [Indexed: 12/27/2022]
|
29
|
Saini R, Garg A, Barz DPJ. Streaming potential revisited: the influence of convection on the surface conductivity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:10950-10961. [PMID: 25148210 DOI: 10.1021/la501426c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Electrokinetic phenomena play an important role in the electrical characterization of surfaces. In terms of planar or porous substrates, streaming potential and/or streaming current measurements can be used to determine the zeta potential of the substrates in contact with aqueous electrolytes. In this work, we perform electrical impedance spectroscopy measurements to infer the electrical resistance in a microchannel with the same conditions as for a streaming potential experiment. Novel correlations are derived to relate the streaming current and streaming potential to the Reynolds number of the channel flow. Our results not only quantify the influence of surface conductivity, and here especially the contribution of the stagnant layer, but also reveal that channel resistance and therefore zeta potential are influenced by the flow in the case of low ionic strengths. We conclude that convection can have a significant impact on the electrical double layer configuration which is reflected by changes in the surfaces conductivity.
Collapse
Affiliation(s)
- Rakesh Saini
- Department of Chemical Engineering, Queen's University , Dupuis Hall 213, Kingston Ontario K7L 3N6, Canada
| | | | | |
Collapse
|