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Casey M, Dano F, Busch T, Aboud DGK, Kietzig AM. Investigating the Effects of Lubricant Infusion Methods on Polymer SLIPS. ACS APPLIED MATERIALS & INTERFACES 2024; 16:37328-37337. [PMID: 38954598 DOI: 10.1021/acsami.4c09014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
Slippery lubricant infused porous surfaces (SLIPSs) are promising bioinspired surfaces with self-healing and droplet wetting properties, among many others, that are desirable due to their range of applications. Recently, there have been many developments in the SLIPS field regarding the creation of textured surfaces and lubricant selection. However, there is a lack of knowledge regarding the method of lubricant infusion. In this study, we aim to fill this void by investigating different infusion methods that impose external forces on the lubricant. We developed our SLIPS by hot embossing nanostructures onto polypropylene by using molds that were laser micromachined. These textured surfaces were then infused with silicone oil using three different infusion methods: ultrasonication, vacuum, and hydrostatic pressure. We analyzed the wettability and slipperiness of the SLIPS by evaluating the critical tilt angle and comparing the sliding velocities of water droplets on each sample at a tilt angle of 20°. Additionally, the durability of the SLIPS was tested by dropping 50 successive water drops onto the samples and evaluating the droplet-surface interactions throughout. The sonicated infusion method yielded SLIPS that performed the best with a contact angle hysteresis of 13°, a critical tilt angle of 18.3°, a sliding velocity of 1.66 mm/s, and the least accumulation of droplets over time with use. These values are greatly improved when compared to the control sample where lubricant was simply dripped on, which resulted in a contact angle hysteresis of 20°, a critical tilt angle of 26.3°, and a sliding velocity of 0.23 mm/s. The sonicated and drip infusion methods were also compared with different materials (stainless steel) and different textures (microstructures). It was found that the improvement in slipperiness using the sonicated infusion method is prominent for nanoscale textures on both stainless steel and polypropylene. In this study, we discuss the challenges with oil depletion in SLIPS (cloaking and wetting ridges) and with the selection of contact angle measurement methods. While further investigation as to why certain applied forces during infusion yield better SLIPS is warranted, these forces greatly affect the outcome. This work suggests that researchers should consider using sonication or other methods of lubricant infusion that apply external forces as infusion techniques to yield better SLIPS on the nanoscale.
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Affiliation(s)
- Molly Casey
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Florian Dano
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Teresa Busch
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Damon G K Aboud
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Anne-Marie Kietzig
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
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2
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The Impact of Syringe Age Prior to Filling on Migration of Subvisible Silicone-Oil Particles into Drug Product. J Pharm Sci 2022; 111:3191-3194. [PMID: 36404459 DOI: 10.1016/j.xphs.2022.09.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/31/2022] [Accepted: 09/14/2022] [Indexed: 01/05/2023]
Abstract
Silicone oil is often applied to the inner surface of glass syringes and cartridges to reduce friction between the glass surface and elastomeric plunger stopper. This oil can appear as intrinsic and non-proteinaceous particles in the ejected fluid or drug product. Limited data is available to understand the impact of age (time between syringe manufacture and filling) on silicone oil migration into the drug product. This study compares subvisible particle count and extrusion force of siliconized syringes from two different manufacturers stored at ambient condition for 2-3 (fresh syringes) and 13-14 (aged syringes) months then filled and placed at 40°C for an additional three months. The fresh syringes exhibit a 2.5-fold increase in subvisible particle count compared to those aged ones. Moreover, the fresh syringes exhibit up to a 2-fold increase in extrusion force. These findings suggest the degree and amount of silicone oil migration is influenced by the time in storage of the glass syringe prior to filling. This rapid communication highlights syringe storage time prior to filling as a factor to be considered during development.
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3
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Wang Y, Alipoormazandarani N, Puumala LS, Gao W, Liu S, Kong F, Wang Q, Fatehi P. Amphiphilic Lignin Nanoparticles Made from Lignin-Acrylic Acid-Methyl Methacrylate Copolymers. NANOMATERIALS 2022; 12:nano12152612. [PMID: 35957040 PMCID: PMC9370363 DOI: 10.3390/nano12152612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 07/25/2022] [Accepted: 07/25/2022] [Indexed: 11/22/2022]
Abstract
In this study, a novel amphiphilic KL-AA-MMA nanoparticle was prepared through the graft copolymerization of kraft lignin (KL) with acrylic acid (AA) and methyl methacrylate (MMA), using potassium persulfate as an initiator in a water/dimethyl sulfoxide solvent medium, which was followed by the nanoprecipitation technique using dimethylformamide as a solvent and deionized water as an antisolvent. The successful graft polymerization was verified by 1H-nuclear magnetic resonance (NMR), 31P-NMR, and Fourier transform infrared (FTIR) analyses; and the grafting yield of the generated KL-AA-MMA copolymer ranged from 68.2% to 96.5%. Transmission electron microscopy (TEM) observation revealed the formation of amorphous KL-AA-MMA nanoparticles. Additionally, KL-AA-MMA9 nanoparticles with the highest yield exhibited the minimum hydrodynamic diameter and polydispersity of 261 nm and 0.153, respectively. Moreover, the amphiphilicity of KL-AA-MMA nanoparticles was significantly improved by the grafting of MMA monomers. Finally, the adsorption performance of KL-AA-MMA nanoparticles at the xylene interface was evaluated by a quartz crystal microbalance with dissipation (QCM-D). The results demonstrated that the most amphiphilic sample, KL-AA-MMA9 nanoparticles, with the smallest hydrodynamic size displayed the highest adsorption on the oil/water interface. This product provides a wide range of applications in oil/water emulsions.
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Affiliation(s)
- Yingchao Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Y.W.); (S.L.); (F.K.)
- Green Processes Research Centre, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada; (N.A.); (L.S.P.); (W.G.)
| | - Niloofar Alipoormazandarani
- Green Processes Research Centre, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada; (N.A.); (L.S.P.); (W.G.)
| | - Lauren Skye Puumala
- Green Processes Research Centre, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada; (N.A.); (L.S.P.); (W.G.)
| | - Weijue Gao
- Green Processes Research Centre, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada; (N.A.); (L.S.P.); (W.G.)
| | - Shanshan Liu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Y.W.); (S.L.); (F.K.)
| | - Fangong Kong
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Y.W.); (S.L.); (F.K.)
| | - Qiang Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Y.W.); (S.L.); (F.K.)
- Correspondence: (Q.W.); (P.F.); Tel.: +1-(807)-343-8697 (P.F.)
| | - Pedram Fatehi
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Y.W.); (S.L.); (F.K.)
- Green Processes Research Centre, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada; (N.A.); (L.S.P.); (W.G.)
- Correspondence: (Q.W.); (P.F.); Tel.: +1-(807)-343-8697 (P.F.)
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4
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Chen X, Huang J, Guo Z. Stable and biocompatible slippery lubricant-infused anode-oxidated titanium nanotube surfaces via a grafted polydimethylsiloxane brush. NEW J CHEM 2021. [DOI: 10.1039/d1nj03465k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work aims at optimizing the structure and enhancing the interaction force between the substrate and the lubricant to prepare a slippery lubricant-infused TiO2 NT surface that maintains stable omniphobic performance in extreme environments.
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Affiliation(s)
- Xiangsheng Chen
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan, People's Republic of China
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China
| | - Jinxia Huang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China
| | - Zhiguang Guo
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan, People's Republic of China
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China
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5
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Rubowitz A, Ayalon A, Roy PK, Shoval S, Legchenkova I, Bormashenko E. Study of wetting of the animal retinas by Water and organic liquids and its Implications for ophthalmology. Colloids Surf B Biointerfaces 2020; 195:111265. [PMID: 32739770 DOI: 10.1016/j.colsurfb.2020.111265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/16/2020] [Accepted: 07/19/2020] [Indexed: 10/23/2022]
Abstract
Interfacial properties of the animal retinas are reported. Wetting of the retina-retinal pigment epithelium-choroid-sclera tissues of cow, sheep, and pig eyes by water, silicone and castor oil was explored experimentally. Both water and silicone oils demonstrated complete wetting of the retina, regardless of the viscosity of the silicone oil, whereas the castor oil demonstrated a partial wetting regime. Similar wetting regimes were observed for sheep, cow and pig retinas. The intact surface of animal retina was found to be both hydrophilic and oleophilic. Wetting experiments with double sandwich oil/water layers were performed. Water demonstrated stronger affinity to the retina than silicone and castor oils, and eventually replaced the oils at the liquid/retina interface. We conclude that aqueous solutions continuously secreted in the living eye may displace silicone oil from the retinal surface and contribute to retinal re-detachment. Study of dynamics of wetting of the animal retina by water and organic oils is reported. The exponent describing the dynamics of spreading of the castor oil is lower than that predicted by the Tanner law. Castor oil may provide more effective tamponade than silicone oil.
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Affiliation(s)
- Alexander Rubowitz
- Retina Service, Department of Ophthalmology, Meir Medical Center, Kfar Saba, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Anfisa Ayalon
- Retina Service, Department of Ophthalmology, Meir Medical Center, Kfar Saba, Israel
| | - Pritam Kumar Roy
- Engineering Faculty, Chemical Engineering Department, Ariel University, 407000, P.O.B. 3, Ariel, Israel; Engineering Faculty, Industrial Engineering and Management Department, Ariel University, P. O. B. 3, 407000 Ariel, Israel
| | - Shraga Shoval
- Engineering Faculty, Industrial Engineering and Management Department, Ariel University, P. O. B. 3, 407000 Ariel, Israel
| | - Irina Legchenkova
- Engineering Faculty, Chemical Engineering Department, Ariel University, 407000, P.O.B. 3, Ariel, Israel
| | - Edward Bormashenko
- Engineering Faculty, Chemical Engineering Department, Ariel University, 407000, P.O.B. 3, Ariel, Israel.
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6
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Peppou-Chapman S, Hong JK, Waterhouse A, Neto C. Life and death of liquid-infused surfaces: a review on the choice, analysis and fate of the infused liquid layer. Chem Soc Rev 2020; 49:3688-3715. [DOI: 10.1039/d0cs00036a] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We review the rational choice, the analysis, the depletion and the properties imparted by the liquid layer in liquid-infused surfaces – a new class of low-adhesion surface.
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Affiliation(s)
- Sam Peppou-Chapman
- School of Chemistry
- The University of Sydney
- Australia
- The University of Sydney Nano Institute
- The University of Sydney
| | - Jun Ki Hong
- School of Chemistry
- The University of Sydney
- Australia
- The University of Sydney Nano Institute
- The University of Sydney
| | - Anna Waterhouse
- The University of Sydney Nano Institute
- The University of Sydney
- Australia
- Central Clinical School
- Faculty of Medicine and Health
| | - Chiara Neto
- School of Chemistry
- The University of Sydney
- Australia
- The University of Sydney Nano Institute
- The University of Sydney
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7
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Sharma M, Roy PK, Barman J, Khare K. Mobility of Aqueous and Binary Mixture Drops on Lubricating Fluid-Coated Slippery Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7672-7679. [PMID: 31117726 DOI: 10.1021/acs.langmuir.9b00483] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The mobility of liquid drops on lubricant-infused slippery surfaces depends strongly on various system parameters, for example, surface energy and roughness of the underlying solid surface and surface tension and viscosity of the test and the lubricating fluids. Here, we investigate lubricant-coated slippery surfaces fabricated on smooth hydrophobic solid surfaces and examine the influence of thickness and viscosity of the lubricating oil on the velocity of aqueous drops. We also investigate the effect of surface tension of the test liquid using a binary mixture of water and ethanol, on the apparent contact angle, which further affects their slip velocity. A theoretical model, based on various dissipative forces acting in different regions of the lubricating oil and a test drop, is also presented, which elucidates the dependence of drop velocity on lubricating oil viscosity and base radius of drops of test liquids.
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Affiliation(s)
- Meenaxi Sharma
- Department of Physics , Indian Institute of Technology Kanpur , Kanpur 208016 , India
| | - Pritam Kumar Roy
- Department of Physics , Indian Institute of Technology Kanpur , Kanpur 208016 , India
| | - Jitesh Barman
- Department of Physics , Indian Institute of Technology Kanpur , Kanpur 208016 , India
| | - Krishnacharya Khare
- Department of Physics , Indian Institute of Technology Kanpur , Kanpur 208016 , India
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8
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Jing X, Guo Z. Fabrication of biocompatible super stable lubricant-immobilized slippery surfaces by grafting a polydimethylsiloxane brush: excellent boiling water resistance, hot liquid repellency and long-term slippery stability. NANOSCALE 2019; 11:8870-8881. [PMID: 31012900 DOI: 10.1039/c9nr01556f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Slippery liquid-infused surfaces that imitate the microstructure of carnivorous Nepenthes have attracted widespread attention due to their excellent liquid and various organic solution repellency, associated with broad applications in various fields. However, the complicated preparation processes and poor oil lock ability of slippery liquid-infused surfaces severely restrict their practical application. Herein, lubricant-immobilized slippery surfaces (LISS) were fabricated by grafting polydimethylsiloxane onto ZnO nanorods under ultraviolet light, with residual non-bound silicone oil acting as a lubricant. In addition, the entire reaction is green, and the chemicals involved are inexpensive and environmentally friendly. Moreover, due to the strong intermolecular forces between the non-bound silicone oil and grafted polydimethylsiloxane, silicone oil is firmly locked to the zinc oxide surface, serving as a lubricant layer with a sliding angle of less than 3°. The LISS not only exhibited superior omniphobicity at room-temperature but also retained excellent sliding ability for high-temperature liquids such as hot water and oleic oil. When subjected to a boiling and high temperature test for 15 min, the liquids still slid on the surface with the tilt angles below 4° due to the presence of a uniform lubricant layer. In addition, under extreme operating conditions, such as high shear rate of up to 7000 rpm, long-term immersion for 400 h and strong acid/alkali, the LISS exhibited outstanding slippery stability. Furthermore, its properties of corrosion resistance, anti-icing and anti-fouling are of great significance for extending the practical application of LISS. Therefore, due to their excellent boiling water/hot liquid repellency and long-term slippery stability, the LISS may be promoted on a large scale and are a breakthrough for traditional slippery surface preparation.
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Affiliation(s)
- Xueshan Jing
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, People's Republic of China
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9
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Usman M, Guo X, Wu Q, Barman J, Su S, Huang B, Biao T, Zhang Z, Zhan Q. Facile silicone oil-coated hydrophobic surface for surface enhanced Raman spectroscopy of antibiotics. RSC Adv 2019; 9:14109-14115. [PMID: 35519331 PMCID: PMC9064153 DOI: 10.1039/c9ra00817a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/03/2019] [Indexed: 01/24/2023] Open
Abstract
The proposed facile, cost-effective slippery surface and gold nanorods based combinational approach for the SERS detection technique is a powerful strategy for the trace detection of the aqueous pollutant analytes even at very low concentrations.
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Affiliation(s)
- Muhammad Usman
- Centre for Optical and Electromagnetic Research
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology
- South China Academy of Advanced Optoelectronics
- South China Normal University
- 510006 Guangzhou
| | - Xin Guo
- Centre for Optical and Electromagnetic Research
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology
- South China Academy of Advanced Optoelectronics
- South China Normal University
- 510006 Guangzhou
| | - Qiusheng Wu
- Centre for Optical and Electromagnetic Research
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology
- South China Academy of Advanced Optoelectronics
- South China Normal University
- 510006 Guangzhou
| | - Jitesh Barman
- Electronic Paper Display Institute
- South China Academy of Advanced Optoelectronics
- South China Normal University
- 510006 Guangzhou
- China
| | - Shaoqiang Su
- Institute of Advanced Materials
- South China Academy of Advanced Optoelectronics
- South China Normal University
- 510006 Guangzhou
- China
| | - Bingru Huang
- Centre for Optical and Electromagnetic Research
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology
- South China Academy of Advanced Optoelectronics
- South China Normal University
- 510006 Guangzhou
| | - Tang Biao
- Electronic Paper Display Institute
- South China Academy of Advanced Optoelectronics
- South China Normal University
- 510006 Guangzhou
- China
| | - Zhang Zhang
- Institute of Advanced Materials
- South China Academy of Advanced Optoelectronics
- South China Normal University
- 510006 Guangzhou
- China
| | - Qiuqiang Zhan
- Centre for Optical and Electromagnetic Research
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology
- South China Academy of Advanced Optoelectronics
- South China Normal University
- 510006 Guangzhou
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10
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Awad TS, Asker D, Hatton BD. Food-Safe Modification of Stainless Steel Food-Processing Surfaces to Reduce Bacterial Biofilms. ACS APPLIED MATERIALS & INTERFACES 2018; 10:22902-22912. [PMID: 29888590 DOI: 10.1021/acsami.8b03788] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Biofilm formation on stainless steel (SS) surfaces of food-processing plants, leading to food-borne illness outbreaks, is enabled by the attachment and confinement of pathogens within microscale cavities of surface roughness (grooves, scratches). We report foodsafe oil-based slippery coatings (FOSCs) for food-processing surfaces that suppress bacterial adherence and biofilm formation by trapping residual oil lubricant within these surface cavities to block microbial growth. SS surfaces were chemically functionalized with alkylphosphonic acid to preferentially wet a layer of food-grade oil. FOSCs reduced the effective surface roughness, the adhesion of organic food residue, and bacteria. FOSCs significantly reduced Pseudomonas aeruginosa biofilm formation on standard roughness SS-316 by 5 log CFU cm-2, and by 3 log CFU cm-2 for mirror-finished SS. FOSCs also enhanced surface cleanability, which we measured by bacterial counts after conventional detergent cleaning. Importantly, both SS grades maintained their antibiofilm activity after the erosion of the oil layer by surface wear with glass beads, which suggests that there is a residual volume of oil that remains to block surface cavity defects. These results indicate the potential of such low-cost, scalable approaches to enhance the cleanability of SS food-processing surfaces and improve food safety by reducing biofilm growth.
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Affiliation(s)
- Tarek S Awad
- Department of Materials Science and Engineering , University of Toronto , Toronto M5S 1A1 , ON , Canada
| | - Dalal Asker
- Department of Materials Science and Engineering , University of Toronto , Toronto M5S 1A1 , ON , Canada
- Food Science and Technology Department, Faculty of Agriculture , Alexandria University , Alexandria 21526 , Egypt
| | - Benjamin D Hatton
- Department of Materials Science and Engineering , University of Toronto , Toronto M5S 1A1 , ON , Canada
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11
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Ujjain SK, Roy PK, Kumar S, Singha S, Khare K. Uniting Superhydrophobic, Superoleophobic and Lubricant Infused Slippery Behavior on Copper Oxide Nano-structured Substrates. Sci Rep 2016; 6:35524. [PMID: 27752098 PMCID: PMC5067640 DOI: 10.1038/srep35524] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 09/27/2016] [Indexed: 11/18/2022] Open
Abstract
Alloys, specifically steel, are considered as the workhorse of our society and are inimitable engineering materials in the field of infrastructure, industry and possesses significant applications in our daily life. However, creating a robust synthetic metallic surface that repels various liquids has remained extremely challenging. The wettability of a solid surface is known to be governed by its geometric nano-/micro structure and the chemical composition. Here, we are demonstrating a facile and economical way to generate copper oxide micro-nano structures with spherical (0D), needle (1D) and hierarchical cauliflower (3D) morphologies on galvanized steel substrates using a simple chemical bath deposition method. These nano/micro textured steel surfaces, on subsequent coating of a low surface energy material display excellent superhydrophobic, superoleophobic and slippery behavior. Polydimethylsiloxane coated textured surfaces illustrate superhydrophobicity with water contact angle about 160°(2) and critical sliding angle ~2°. When functionalized with low-surface energy perfluoroalkylsilane, these surfaces display high repellency for low surface tension oils as well as hydrocarbons. Among them, the hierarchical cauliflower morphology exhibits re-entrant structure thereby showing the best superoleophobicity with contact angle 149° for dodecane. Once infused with a lubricant like silicone oil, they show excellent slippery behavior with low contact angle hysteresis (~ 2°) for water drops.
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Affiliation(s)
- Sanjeev Kumar Ujjain
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur - 208016, India
| | - Pritam Kumar Roy
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur - 208016, India
| | - Sumana Kumar
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur - 208016, India
| | - Subhash Singha
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur - 208016, India
| | - Krishnacharya Khare
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur - 208016, India
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12
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Roy PK, Pant R, Nagarajan AK, Khare K. Mechanically Tunable Slippery Behavior on Soft Poly(dimethylsiloxane)-Based Anisotropic Wrinkles Infused with Lubricating Fluid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5738-5743. [PMID: 27221199 DOI: 10.1021/acs.langmuir.6b00865] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We demonstrate a novel technique to fabricate mechanically tunable slippery surfaces using one-dimensional (anisotropic) elastic wrinkles. Such wrinkles show tunable topography (amplitude) on the application of mechanical strain. Following Nepenthes pitcher plants, lubricating fluid infused solid surfaces show excellent slippery behavior for test liquid drops. Therefore, combining the above two, that is, infusing suitable lubricating fluid on elastic wrinkles, would enable us to fabricate mechanically tunable slippery surfaces. Completely stretched (flat) wrinkles have uniform coating of lubricating fluid, whereas completely relaxed (full amplitude) wrinkles have most of the lubricating oil in the wrinkle grooves. Therefore, water drops on completely stretched surface show excellent slippery behavior, whereas on completely relaxed surface they show reduced slippery behavior. Therefore, continuous variation of wrinkle stretching provides reversibly tunable slippery behavior on such a system. Because the wrinkles are one-dimensional, they show anisotropic tunability of slippery behavior depending upon whether test liquid drops slip parallel or perpendicular to the wrinkles.
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Affiliation(s)
- Pritam Kumar Roy
- Department of Physics, Indian Institute of Technology Kanpur , Kanpur 208016, India
| | - Reeta Pant
- Department of Physics, Indian Institute of Technology Kanpur , Kanpur 208016, India
| | | | - Krishnacharya Khare
- Department of Physics, Indian Institute of Technology Kanpur , Kanpur 208016, India
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13
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Liu B, Zhang K, Tao C, Zhao Y, Li X, Zhu K, Yuan X. Strategies for anti-icing: low surface energy or liquid-infused? RSC Adv 2016. [DOI: 10.1039/c6ra11383d] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recent progress on the preparation and surface characteristics of polymeric anti-icing coatings from low surface energy or liquid-infused slippery surfaces is reviewed and illustrated.
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Affiliation(s)
- Bo Liu
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- China
| | - Kaiqiang Zhang
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- China
| | - Chao Tao
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- China
| | - Yunhui Zhao
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- China
| | - Xiaohui Li
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- China
| | - Kongying Zhu
- Analysis and Measurement Center
- Tianjin University
- Tianjin 300072
- China
| | - Xiaoyan Yuan
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- China
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