1
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Behrangzade A, Ye SH, Maestas DR, Wagner WR, Vande Geest JP. Improving the hemocompatibility of a porohyperelastic layered vascular graft using luminal reversal microflows. J Mech Behav Biomed Mater 2024; 157:106638. [PMID: 38996626 DOI: 10.1016/j.jmbbm.2024.106638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 06/18/2024] [Accepted: 06/18/2024] [Indexed: 07/14/2024]
Abstract
Vascular graft thrombosis is a long-standing clinical problem. A myriad of efforts have been devoted to reducing thrombus formation following bypass surgery. Researchers have primarily taken a chemical approach to engineer and modify surfaces, seeking to make them more suitable for blood contacting applications. Using mechanical forces and surface topology to prevent thrombus formation has recently gained more attention. In this study, we have designed a bilayered porous vascular graft capable of repelling platelets and destabilizing absorbed protein layers from the luminal surface. During systole, fluid penetrates through the graft wall and is subsequently ejected from the wall into the luminal space (Luminal Reversal Flow - LRF), pushing platelets away from the surface during diastole. In-vitro hemocompatibility tests were conducted to compare platelet deposition in high LRF grafts with low LRF grafts. Graft material properties were determined and utilized in a porohyperelastic (PHE) finite element model to computationally predict the LRF generation in each graft type. Hemocompatibility testing showed significantly lower platelet deposition values in high versus low LRF generating grafts (median±IQR = 5,708 ± 987 and 23,039 ± 3,310 platelets per mm2, respectively, p=0.032). SEM imaging of the luminal surface of both graft types confirmed the quantitative blood test results. The computational simulations of high and low LRF generating grafts resulted in LRF values of -10.06 μm/s and -2.87 μm/s, respectively. These analyses show that a 250% increase in LRF is associated with a 75.2% decrease in platelet deposition. PHE vascular grafts with high LRF have the potential to improve anti-thrombogenicity and reduce thrombus-related post-procedure complications. Additional research is required to overcome the limitations of current graft fabrication technologies that further enhance LRF generation.
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Affiliation(s)
- Ali Behrangzade
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Sang-Ho Ye
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - David R Maestas
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - William R Wagner
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States of America; Department of Surgery, University of Pittsburgh, Pittsburgh, PA, United States of America; Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, United States of America; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Jonathan P Vande Geest
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States of America; Department of Mechanical Engineering and Material Science, University of Pittsburgh, Pittsburgh, PA, United States of America; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, United States of America; Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, United States of America.
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2
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Barajas B, Kurtz IS, Waldman AJ, Schiffman JD. Stiffness and Oligomer Content Affect the Initial Adhesion of Staphylococcus aureus to Polydimethylsiloxane Gels. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37922414 DOI: 10.1021/acsami.3c11349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
The growing prevalence of methicillin-resistant Staphylococcus aureus (S. aureus) infections necessitates a greater understanding of their initial adhesion to medically relevant surfaces. In this study, the influence of the mechanical properties and oligomer content of polydimethylsiloxane (PDMS) gels on the initial attachment of Gram-positive S. aureus was explored. Small-amplitude oscillatory shear rheological measurements were conducted to verify that by altering the base to curing (B:C) ratio of the commonly used Sylgard 184 silicone elastomer kit (B:C ratios of 60:1, 40:1, 10:1, and 5:1), PDMS gels could be synthesized with Young's moduli across four distinct regimes: ultrasoft (15 kPa), soft (30 kPa), standard (400 kPa), and stiff (1500 kPa). These as-prepared gels (unextracted) were compared to gels prepared from the same B/C ratios that underwent Soxhlet extraction to remove any unreacted oligomers. While the Young's moduli of unextracted and extracted PDMS gels prepared from the same B:C ratio were statistically equivalent, the associated adhesion failure energy statistically decreased for the ultrasoft gels after extraction (from 25 to 8 J/mm2). The interactions of these eight well-characterized gels with bacteria were tested by using S. aureus SH1000, a commonly studied laboratory strain, as well as S. aureus ATCC 12600, which was isolated from a human lung infection. Increased S. aureus inactivation occurred only when the bacteria were incubated directly on top of the unextracted gels prepared at high B:C ratios (40:1 and 60:1), whereas none of the extracted gels (no unreacted oligomers) had significant levels of inactivated bacteria. S. aureus adhered the least to the stiffest extracted PDMS gels (no unreacted oligomers) and the most to soft, unextracted PDMS gels (with ∼17% unreacted oligomers). These findings suggest that both unreacted oligomers and Young's moduli are important material factors to consider when exploring the attachment behavior of Gram-positive S. aureus to hydrophobic elastomer gels.
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Affiliation(s)
- Brandon Barajas
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303, United States
| | - Irene S Kurtz
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303, United States
| | - Abraham J Waldman
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303, United States
| | - Jessica D Schiffman
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303, United States
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3
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Yu Z, Liu L, Deng Y, Zhang X, Yu C. Study on the blood flow characteristics of venous needle retention with different super-hydrophobic surface structures. Med Biol Eng Comput 2023; 61:867-874. [PMID: 36627517 PMCID: PMC9918569 DOI: 10.1007/s11517-023-02767-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 01/03/2023] [Indexed: 01/12/2023]
Abstract
A venous retention needle, as an implanted device, is very likely to cause thrombosis. In view of the thrombosis phenomenon caused by retention needles, this paper compares the influence of different superhydrophobic surface retentions on blood flow. Compared with other superhydrophobic bulges, the fluid velocity of the four-prism bulge is the highest (0.08 m/s), and the vorticity and shear force of the hemispherical bulge are higher. A large number of vortices can inhibit thrombosis better. The tire vortices generated in the superhydrophobic convex grooves are important vortices to inhibit thrombosis. The enhancement and development of the tire vortex weakens the resistance near the wall of the needle and reduces the probability of platelet aggregation. The superhydrophobic surface structure studied in this paper can not only provide guidance for the design of venous retention needles with better performance but also provide corresponding technical support for the development of human implantation devices.
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Affiliation(s)
- Zhun Yu
- Third Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, 130021 Jilin China
| | - Lei Liu
- Third Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, 130021 Jilin China
| | - Yongzhi Deng
- Third Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, 130021 Jilin China
| | - Xiaowen Zhang
- Third Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, 130021 Jilin China
| | - Chao Yu
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, Jilin, China.
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4
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Wakabayashi N, Yoshida T, Oyama K, Naruse D, Tsutsui M, Kikuchi Y, Koga D, Kamiya H. Polyvinyl alcohol coating prevents platelet adsorption and improves mechanical property of polycaprolactone-based small-caliber vascular graft. Front Cardiovasc Med 2022; 9:946899. [PMID: 36035951 PMCID: PMC9403249 DOI: 10.3389/fcvm.2022.946899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/27/2022] [Indexed: 11/13/2022] Open
Abstract
The low patency of synthetic vascular grafts hinders their practical applicability. Polyvinyl alcohol (PVA) is a non-toxic, highly hydrophilic polymer; thus, we created a PVA-coated polycaprolactone (PCL) nanofiber vascular graft (PVA–PCL graft). In this study, we examine whether PVA could improve the hydrophilicity of PCL grafts and evaluate its in vivo performance using a rat aorta implantation model. A PCL graft with an inner diameter of 1 mm is created using electrospinning (control). The PCL nanofibers are coated with PVA, resulting in a PVA–PCL graft. Mechanical property tests demonstrate that the PVA coating significantly increases the stiffness and resilience of the PCL graft. The PVA–PCL surface exhibits a much smaller sessile drop contact angle when compared with that of the control, indicating that the PVA coating has hydrophilic properties. Additionally, the PVA–PCL graft shows significantly less platelet adsorption than the control. The proposed PVA–PCL graft is implanted into the rat’s abdominal aorta, and its in vivo performance is tested at 8 weeks. The patency rate is 83.3% (10/12). The histological analysis demonstrates autologous cell engraftment on and inside the scaffold, as well as CD31/α-smooth muscle positive neointima regeneration on the graft lumen. Thus, the PVA–PCL grafts exhibit biocompatibility in the rat model, which suggests that the PVA coating is a promising approach for functionalizing PCL.
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Affiliation(s)
- Naohiro Wakabayashi
- Department of Cardiac Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Takumi Yoshida
- Life Materials Development Section, Human Life Technology Research Institute, Toyama Industrial Technology Research and Development Center, Toyama, Japan
| | - Kyohei Oyama
- Department of Cardiac Surgery, Asahikawa Medical University, Asahikawa, Japan
- *Correspondence: Kyohei Oyama,
| | - Daisuke Naruse
- Business Development Section, Department of Business Development and Quality Control, Iaazaj Holdings Co., Ltd., Toyama, Japan
| | - Masahiro Tsutsui
- Department of Cardiac Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Yuta Kikuchi
- Department of Cardiac Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Daisuke Koga
- Department of Microscopic Anatomy and Cell Biology, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroyuki Kamiya
- Department of Cardiac Surgery, Asahikawa Medical University, Asahikawa, Japan
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5
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Chen C, Tian Z, Luo X, Jiang G, Hu X, Wang L, Peng R, Zhang H, Zhong M. Micro-Nano-Nanowire Triple Structure-Held PDMS Superhydrophobic Surfaces for Robust Ultra-Long-Term Icephobic Performance. ACS APPLIED MATERIALS & INTERFACES 2022; 14:23973-23982. [PMID: 35535994 DOI: 10.1021/acsami.2c02992] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Anti-icing superhydrophobic surfaces have attracted tremendous interests due to their repellency to water and extremely low ice affinity, whereas the weak durability has been the bottleneck for further applications. Surface durability is especially important in long-term exposure to low-temperature and high-humidity environments. In this study, a robust micro-nano-nanowire triple structure-held PDMS superhydrophobic surface was fabricated via a hybrid process: ultrafast-laser-prepared periodic copper microstructures were chemically oxidized, followed by modification of PDMS. The hedgehog-like surface structure was composed of microcones, densely grown nanowires, and tightly combined PDMS. The capillary force difference in micro-nanostructures drove PDMS solutions to distribute evenly, bonding fragile nanowires to form stronger composite cones. PDMS replaced the commonly used fragile fluorosilanes and protected nanowires from breaking, which endowed the surfaces with higher robustness. The ductile PDMS-nanowire composites possessed higher resiliency than brittle nanowires under a load of 1 mN. The surface kept superhydrophobic and ice-resistant after 15 linear abrasion cycles under 1.2 kPa or 60 icing-deicing cycles under -20 °C or 500 tape peeling cycles. Under a higher pressure of 6.2 kPa, the contact angle (CA) was maintained above 150° until the abrasion distance exceeded 8 m. In addition, the surface exhibited a rare spontaneously optimized performance in the icing-deicing cycles. The ice adhesion strength of the surface reached its lowest value of 12.2 kPa in the 16th cycle. Evolution of surface roughness and morphology were combined to explain its unique U-shaped performance curves, which distinguished its unique degradation process from common surfaces. Thus, this triple-scale superhydrophobic surface showed a long-term anti-icing performance with high deicing robustness and low ice adhesion strength. The proposed nanostructure-facilitated uniform distribution strategy of PDMS is promising in future design of durable superhydrophobic anti-icing surfaces.
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Affiliation(s)
- Changhao Chen
- Laser Materials Processing Research Center, Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
- Tsinghua University(SMSE) - AVIC - ARI Joint Research Center for Advanced Materials and Anti-Icing, Tsinghua University, Beijing 100084, P. R. China
| | - Ze Tian
- Laser Materials Processing Research Center, Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
- Tsinghua University(SMSE) - AVIC - ARI Joint Research Center for Advanced Materials and Anti-Icing, Tsinghua University, Beijing 100084, P. R. China
| | - Xiao Luo
- Laser Materials Processing Research Center, Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Guochen Jiang
- Laser Materials Processing Research Center, Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Xinyu Hu
- Laser Materials Processing Research Center, Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Lizhong Wang
- Laser Materials Processing Research Center, Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
- Tsinghua University(SMSE) - AVIC - ARI Joint Research Center for Advanced Materials and Anti-Icing, Tsinghua University, Beijing 100084, P. R. China
| | - Rui Peng
- Laser Materials Processing Research Center, Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
- Tsinghua University(SMSE) - AVIC - ARI Joint Research Center for Advanced Materials and Anti-Icing, Tsinghua University, Beijing 100084, P. R. China
| | - Hongjun Zhang
- Laser Materials Processing Research Center, Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
- Tsinghua University(SMSE) - AVIC - ARI Joint Research Center for Advanced Materials and Anti-Icing, Tsinghua University, Beijing 100084, P. R. China
| | - Minlin Zhong
- Laser Materials Processing Research Center, Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
- Tsinghua University(SMSE) - AVIC - ARI Joint Research Center for Advanced Materials and Anti-Icing, Tsinghua University, Beijing 100084, P. R. China
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6
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Zebhi B, Lazkani M, Bark D. Calcific Aortic Stenosis-A Review on Acquired Mechanisms of the Disease and Treatments. Front Cardiovasc Med 2021; 8:734175. [PMID: 34604358 PMCID: PMC8486019 DOI: 10.3389/fcvm.2021.734175] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 08/18/2021] [Indexed: 11/13/2022] Open
Abstract
Calcific aortic stenosis is a progressive disease that has become more prevalent in recent decades. Despite advances in research to uncover underlying biomechanisms, and development of new generations of prosthetic valves and replacement techniques, management of calcific aortic stenosis still comes with unresolved complications. In this review, we highlight underlying molecular mechanisms of acquired aortic stenosis calcification in relation to hemodynamics, complications related to the disease, diagnostic methods, and evolving treatment practices for calcific aortic stenosis.
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Affiliation(s)
- Banafsheh Zebhi
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, United States
| | - Mohamad Lazkani
- Medical Center of the Rockies, University of Colorado Health, Loveland, CO, United States
| | - David Bark
- Department of Pediatrics, Washington University in Saint Louis, Saint Louis, MO, United States.,Department of Biomedical Engineering, Washington University in Saint Louis, Saint Louis, MO, United States
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7
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He T, He J, Wang Z, Cui Z. Modification strategies to improve the membrane hemocompatibility in extracorporeal membrane oxygenator (ECMO). ADVANCED COMPOSITES AND HYBRID MATERIALS 2021; 4:847-864. [PMID: 33969267 PMCID: PMC8091652 DOI: 10.1007/s42114-021-00244-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/26/2021] [Accepted: 03/16/2021] [Indexed: 05/26/2023]
Abstract
ABSTRACT Since extracorporeal membrane oxygenator (ECMO) has been utilized to save countless lives by providing continuous extracorporeal breathing and circulation to patients with severe cardiopulmonary failure. In particular, it has played an important role during the COVID-19 epidemic. One of the important composites of ECMO is membrane oxygenator, and the core composite of the membrane oxygenator is hollow fiber membrane, which is not only a place for blood oxygenation, but also is a barrier between the blood and gas side. However, the formation of blood clots in the oxygenator is a key problem in the using process. According to the study of the mechanism of thrombosis generation, it was found that improving the hemocompatibility is an efficient approach to reduce thrombus formation by modifying the surface of materials. In this review, the corresponding modification methods (surface property regulation, anticoagulant grafting, and bio-interface design) of hollow fiber membranes in ECMO are classified and discussed, and then, the research status and development prospects are summarized.
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Affiliation(s)
- Ting He
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, 210009 Nanjing, China
| | - Jinhui He
- National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, 210009 Nanjing, China
| | - Zhaohui Wang
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 210009 Nanjing, China
| | - Zhaoliang Cui
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, 210009 Nanjing, China
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8
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Li J, Xiao M, Wang Y, Yang J, Liu W. Robust and Antiswelling Hollow Hydrogel Tube with Antibacterial and Antithrombotic Ability for Emergency Vascular Replacement. ACS APPLIED BIO MATERIALS 2021; 4:3598-3607. [PMID: 35014445 DOI: 10.1021/acsabm.1c00096] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Infection and thrombosis are the two major complications in almost any indwelling intravascular catheters, leading to adverse consequences. Here, we report a robust and antiswelling hollow hydrogel tube that is prepared by copolymerizing a hydrogen-bonding (H-bonding) monomer and a zinc methacrylate (ZMA) monomer in the absence of any chemical cross-linker. The strong H-bonding interactions from the side chain of N-acryloylsemicarbazide (NASC) endow the hydrogel with high mechanical strength and swelling stability. Introduction of ZMA affords a superhydrophilic surface, and the release of a zinc ion (Zn2+) from the hydrogel can kill nearly 100% both of Staphylococcus aureus and Escherichia coli, indicating its excellent antibacterial ability. Importantly, the P(NASC-co-ZMA) hydrogel exhibits better antithrombosis ability due to the resistant adhesion of fibrinogen protein and platelets, as well binding calcium ions (Ca2+) from the blood. The hydrogel tube is used to connect the ex vivo arteriovenous shunt circuit or implanted into the left carotid artery in the rabbit model, showing a better patency rate. All of these results suggest that this hydrogel tube may mitigate infection and thrombosis complications, thus holding potential as an artificial blood vessel for emergency vascular replacement.
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Affiliation(s)
- Jia Li
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Meng Xiao
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Yanjie Wang
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Jianhai Yang
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Wenguang Liu
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
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9
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Clauser JC, Maas J, Arens J, Schmitz-Rode T, Steinseifer U, Berkels B. Hemocompatibility Evaluation of Biomaterials-The Crucial Impact of Analyzed Area. ACS Biomater Sci Eng 2021; 7:553-561. [PMID: 33481566 DOI: 10.1021/acsbiomaterials.0c01589] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The hemocompatibility of blood-contacting medical devices remains one of the major challenges in medical device development. A common tool for the analysis of adherent and activated platelets on materials following in vitro tests is microscopy. Currently, most researchers develop their own routines, resulting in numerous different methods that are applied. The majority of those (semi-)manual methods analyze only a very small fraction of the material surface (<1%), which neglects the inhomogeneity of platelet distribution and makes results hardly comparable. Within this study, we examined the relation between the fraction of analyzed sample area and the platelet adhesion result. By means of image segmentation and machine learning algorithms, 103 100 microscopy images were analyzed automatically. We discovered a crucial impact of the analyzed surface fraction and thus a misrepresentation of a surface's platelet adhesion unless up to 40% of the sample surface is analyzed. These findings underline the necessity of standardization in the field of in vitro hemocompatibility tests and analyses in particular and provide a first basis to make future tests more reliable and comparable.
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Affiliation(s)
- Johanna C Clauser
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany
| | - Judith Maas
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany
| | - Jutta Arens
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany.,Chair in Engineering Organ Support Technologies, Department of Biomechanical Engineering, Faculty of Engineering Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands
| | - Thomas Schmitz-Rode
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany
| | - Ulrich Steinseifer
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany
| | - Benjamin Berkels
- AICES Graduate School, RWTH Aachen University, Schinkelstr. 2, 52062 Aachen, Germany.,Institute for Geometry and Practical Mathematics, RWTH Aachen University, Templergraben 55, 52056 Aachen, Germany
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10
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Akhidime ID, Slate AJ, Hulme A, Whitehead KA. The Influence of Surface Topography and Wettability on Escherichia coli Removal from Polymeric Materials in the Presence of a Blood Conditioning Film. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E7368. [PMID: 33050212 PMCID: PMC7599617 DOI: 10.3390/ijerph17207368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/30/2020] [Accepted: 10/03/2020] [Indexed: 12/25/2022]
Abstract
The reduction of biofouling and the reduction of cross-contamination in the food industry are important aspects of safety management systems. Polymeric surfaces are used extensively throughout the food production industry and therefore ensuring that effective cleaning regimes are conducted is vital. Throughout this study, the influence of the surface characteristics of three different polymeric surfaces, polytetrafluoroethylene (PTFE), poly(methyl methacrylate) (PMMA) and polyethylene terephthalate (PET), on the removal of Escherichia coli using a wipe clean method utilising 3% sodium hypochlorite was determined. The PTFE surfaces were the roughest and demonstrated the least wettable surface (118.8°), followed by the PMMA (75.2°) and PET surfaces (53.9°). Following cleaning with a 3% sodium hypochlorite solution, bacteria were completely removed from the PTFE surfaces, whilst the PMMA and PET surfaces still had high numbers of bacteria recovered (1.2 × 107 CFU/mL and 6.3 × 107 CFU/mL, respectively). When bacterial suspensions were applied to the surfaces in the presence of a blood conditioning film, cleaning with sodium hypochlorite demonstrated that no bacteria were recovered from the PMMA surface. However, on both the PTFE and PET surfaces, bacteria were recovered at lower concentrations (2.0 × 102 CFU/mL and 1.3 × 103 CFU/mL, respectively). ATP bioluminescence results demonstrated significantly different ATP concentrations on the surfaces when soiled (PTFE: 132 relative light units (RLU), PMMA: 80 RLU and PET: 99 RLU). Following cleaning, both in the presence and absence of a blood conditioning film, all the surfaces were considered clean, producing ATP concentrations in the range of 0-2 RLU. The results generated in this study demonstrated that the presence of a blood conditioning film significantly altered the removal of bacteria from the polymeric surfaces following a standard cleaning regime. Conditioning films which represent the environment where the surface is intended to be used should be a vital part of the test regime to ensure an effective disinfection process.
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Affiliation(s)
- I. Devine Akhidime
- Microbiology at Interfaces, Manchester Metropolitan University, Chester St, Manchester M1 5GD, UK; (I.D.A.); (A.H.)
| | - Anthony J. Slate
- Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK;
| | - Anca Hulme
- Microbiology at Interfaces, Manchester Metropolitan University, Chester St, Manchester M1 5GD, UK; (I.D.A.); (A.H.)
| | - Kathryn A. Whitehead
- Microbiology at Interfaces, Manchester Metropolitan University, Chester St, Manchester M1 5GD, UK; (I.D.A.); (A.H.)
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11
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Hatoum H, Vallabhuneni S, Kota AK, Bark DL, Popat KC, Dasi LP. Impact of superhydrophobicity on the fluid dynamics of a bileaflet mechanical heart valve. J Mech Behav Biomed Mater 2020; 110:103895. [PMID: 32957201 PMCID: PMC11046437 DOI: 10.1016/j.jmbbm.2020.103895] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 05/13/2020] [Accepted: 05/30/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The objective of this study is to evaluate the impact of superhydrophobic coating on the hemodynamics and turbulence characteristics of a bileaflet mechanical valve in the context of evaluating blood damage potential. METHODS Two 3D printed bileaflet mechanical valves were hemodynamically tested in a pulse duplicator under physiological pressure and flow conditions. The leaflets of one of the two valves were sprayed with a superhydrophobic coating. Particle Image Velocimetry was performed. Pressure gradients (PG), effective orifice areas (EOA), Reynolds shear stresses (RSS) and instantaneous viscous shear stresses (VSS) were calculated. RESULTS (a) Without SH coating, the PG was found to be 14.53 ± 0.7 mmHg and EOA 1.44 ± 0.06 cm2. With coating, the PG obtained was 15.21 ± 1.7 mmHg and EOA 1.39 ± 0.07 cm2; (b) during peak systole, the magnitude of RSS with SH coating (110Pa) exceeded that obtained without SH coating (40 Pa) with higher probabilities to develop higher RSS in the immediate wake of the leaflet; (c) The magnitudes range of instantaneous VSS obtained with SH coating were slightly larger than those obtained without SH coating (7.0 Pa versus 5.0 Pa). CONCLUSION With Reynolds Shear Stresses and instantaneous Viscous Shear Stresses being correlated with platelet damage, SH coating did not lead to their decrease. While SH coating is known to improve surface properties such as reduced platelet or clot adhesion, the relaxation of the slip condition does not necessarily improve overall hemodynamic performance for the bileaflet mechanical valve design.
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Affiliation(s)
- Hoda Hatoum
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Sravanthi Vallabhuneni
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC, USA
| | - Arun Kumar Kota
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC, USA
| | - David L Bark
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Ketul C Popat
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Lakshmi Prasad Dasi
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
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12
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Khuyen NQ, Kiefer R, Elhi F, Anbarjafari G, Martinez JG, Tamm T. A Biomimetic Approach to Increasing Soft Actuator Performance by Friction Reduction. Polymers (Basel) 2020; 12:E1120. [PMID: 32422917 PMCID: PMC7284564 DOI: 10.3390/polym12051120] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/28/2020] [Accepted: 05/12/2020] [Indexed: 12/02/2022] Open
Abstract
While increasing power output is the most straight-forward solution for faster and stronger motion in technology, sports, or elsewhere, efficiency is what separates the best from the rest. In nature, where the possibilities of power increase are limited, efficiency of motion is particularly important; the same principle can be applied to the emerging biomimetic and bio-interacting technologies. In this work, by applying hints from nature, we consider possible approaches of increasing the efficiency of motion through liquid medium of bilayer ionic electroactive polymer actuations, focusing on the reduction of friction by means of surface tension and hydrophobicity. Conducting polyethylene terephthalate (PET) bilayers were chosen as the model actuator system. The actuation medium consisted of aqueous solutions containing tetramethylammonium chloride and sodium dodecylbenzenesulfonate in different ratios. The roles of ion concentrations and the surface tension are discussed. Hydrophobicity of the PET support layer was further tuned by adding a spin-coated silicone layer to it. As expected, both approaches increased the displacement-the best results having been obtained by combining both, nearly doubling the bending displacement. The simple approaches for greatly increasing actuation motion efficiency can be used in any actuator system operating in a liquid medium.
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Affiliation(s)
- Nguyen Quang Khuyen
- Conducting Polymers in Composites and Applications Research Group, Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam;
| | - Rudolf Kiefer
- Conducting Polymers in Composites and Applications Research Group, Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam;
| | - Fred Elhi
- Intelligent Materials and System Lab, Institute of Technology, University of Tartu, Nooruse 1, 50411 Tartu, Estonia; (F.E.); (T.T.)
| | - Gholamreza Anbarjafari
- iCV Research Lab, Institute of Technology, University of Tartu, 50411 Tartu, Estonia;
- Faculty of Engineering, Hasan Kalyoncu University, 27100 Gaziantep, Turkey
| | - Jose G. Martinez
- Division of Sensor and Actuator Systems, Department of Physics, Chemistry and Biology (IFM), Linköping University, 581 83 Linköping, Sweden;
| | - Tarmo Tamm
- Intelligent Materials and System Lab, Institute of Technology, University of Tartu, Nooruse 1, 50411 Tartu, Estonia; (F.E.); (T.T.)
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13
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Movafaghi S, Wang W, Bark DL, Dasi LP, Popat KC, Kota AK. Hemocompatibility of Super-Repellent surfaces: Current and Future. MATERIALS HORIZONS 2019; 6:1596-1610. [PMID: 31903188 PMCID: PMC6941870 DOI: 10.1039/c9mh00051h] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Virtually all blood-contacting medical implants and devices initiate immunological events in the form of thrombosis and inflammation. Typically, patients receiving such implants are also given large doses of anticoagulants, which pose a high risk and a high cost to the patient. Thus, the design and development of surfaces with improved hemocompatibility and reduced dependence on anticoagulation treatments is paramount for the success of blood-contacting medical implants and devices. In the past decade, the hemocompatibility of super-repellent surfaces (i.e., surfaces that are extremely repellent to liquids) has been extensively investigated because such surfaces greatly reduce the blood-material contact area, which in turn reduces the area available for protein adsorption and blood cell or platelet adhesion, thereby offering the potential for improved hemocompatibility. In this review, we critically examine the progress made in characterizing the hemocompatibility of super-repellent surfaces, identify the unresolved challenges and highlight the opportunities for future research on developing medical implants and devices with super-repellent surfaces.
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Affiliation(s)
- Sanli Movafaghi
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA
| | - Wei Wang
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA
| | - David L Bark
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA
| | - Lakshmi P Dasi
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Ketul C Popat
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA
| | - Arun K Kota
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA
- Department of Chemical & Biological Engineering, Colorado State University, Fort Collins, CO 80523, USA
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14
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Jang Y, Lee M, Kim H, Cha C, Jung J, Oh J. Comprehensive tuning of bioadhesive properties of polydimethylsiloxane (PDMS) membranes with controlled porosity. Biofabrication 2019; 11:035021. [DOI: 10.1088/1758-5090/ab1da9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Affiliation(s)
- Esmaeil Salimi
- Faculty of Chemical and Materials Engineering, Shahrood University of Technology, Shahrood, Iran
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16
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Control of Polydimethylsiloxane Surface Hydrophobicity by Plasma Polymerized Hexamethyldisilazane Deposition. COATINGS 2019. [DOI: 10.3390/coatings9010036] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The properties of a polydimethylsiloxane (PDMS) surface were modified by a one-step deposition of plasma polymerized hexamethyldisilazane (pp-HMDS) by the arc discharge method. Scanning electron microscopy, atomic force microscopy, and Fourier-transform infrared spectroscopy analytical techniques were employed for morphological, structural, and chemical characterization of the pp-HMDS modified PDMS surface. The changes in PDMS substrate wetting properties were evaluated by means of contact angle measurements. The unmodified PDMS surface is hydrophobic with a contact angle of 122°, while, after pp-HMDS film deposition, a dual-scale roughness PDMS surface with contact angle values as high as 170° was obtained. It was found that the value of the contact angle depends on the plasma processing time. Chemically, the pp-HMDS presents methyl moieties, rendering it hydrophobic and making it an attractive material for creating a superhydrophobic surface, and eliminating the need for complex chemical routes. The presented approach may open up new avenues in design and fabrication of superhydrophobic and flexible organosilicon materials with a self-cleaning function.
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17
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Qu ZT, Duan SY, Li BB, Sun D, Gu YL. PDMS/PVDF microporous membrane with semi-interpenetrating polymer networks for vacuum membrane distillation. J Appl Polym Sci 2017. [DOI: 10.1002/app.45792] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zhao-Tong Qu
- Department of Chemical Engineering; Changchun University of Technology; Changchun 130012 People's Republic of China
| | - Shi-Yuan Duan
- Changchun Tiangong Environmental System Co., Ltd; Changchun 130033 People's Republic of China
| | - Bing-Bing Li
- Department of Chemical Engineering; Changchun University of Technology; Changchun 130012 People's Republic of China
| | - De Sun
- Department of Chemical Engineering; Changchun University of Technology; Changchun 130012 People's Republic of China
| | - Yun-Lei Gu
- Department of Chemical Engineering; Changchun University of Technology; Changchun 130012 People's Republic of China
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18
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Iqbal R, Majhy B, Sen AK. Facile Fabrication and Characterization of a PDMS-Derived Candle Soot Coated Stable Biocompatible Superhydrophobic and Superhemophobic Surface. ACS APPLIED MATERIALS & INTERFACES 2017; 9:31170-31180. [PMID: 28829562 DOI: 10.1021/acsami.7b09708] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We report a simple, inexpensive, rapid, and one-step method for the fabrication of a stable and biocompatible superhydrophobic and superhemophobic surface. The proposed surface comprises candle soot particles embedded in a mixture of PDMS+n-hexane serving as the base material. The mechanism responsible for the superhydrophobic behavior of the surface is explained, and the surface is characterized based on its morphology and elemental composition, wetting properties, mechanical and chemical stability, and biocompatibility. The effect of %n-hexane in PDMS, the thickness of the PDMS+n-hexane layer (in terms of spin coating speed) and sooting time on the wetting property of the surface is studied. The proposed surface exhibits nanoscale surface asperities (average roughness of 187 nm), chemical compositions of soot particles, very high water and blood repellency along with excellent mechanical and chemical stability and excellent biocompatibility against blood sample and biological cells. The water contact angle and roll-off angle is measured as 160° ± 1° and 2°, respectively, and the blood contact angle is found to be 154° ± 1°, which indicates that the surface is superhydrophobic and superhemophobic. The proposed superhydrophobic and superhemophobic surface offers significantly improved (>40%) cell viability as compared to glass and PDMS surfaces.
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Affiliation(s)
- R Iqbal
- Department of Mechanical Engineering, Indian Institute of Technology Madras , Chennai 600036, India
| | - B Majhy
- Department of Mechanical Engineering, Indian Institute of Technology Madras , Chennai 600036, India
| | - A K Sen
- Department of Mechanical Engineering, Indian Institute of Technology Madras , Chennai 600036, India
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19
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Movafaghi S, Leszczak V, Wang W, Sorkin JA, Dasi LP, Popat KC, Kota AK. Response to "Correspondence Concerning Hemocompatibility of Superhemophobic Titania Surfaces". Adv Healthc Mater 2017; 6. [PMID: 28703490 DOI: 10.1002/adhm.201700647] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Indexed: 12/26/2022]
Affiliation(s)
- S. Movafaghi
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - V. Leszczak
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - W. Wang
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - J. A. Sorkin
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - L. P. Dasi
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
- School of Biomedical Engineering; Colorado State University; Fort Collins CO 80523 USA
- Department of Biomedical Engineering; Dorothy Davis Heart and Lung Research Institute; Ohio State University; Columbus OH 43210 USA
| | - K. C. Popat
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
- School of Biomedical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - A. K. Kota
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
- School of Biomedical Engineering; Colorado State University; Fort Collins CO 80523 USA
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20
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Fabrication of Polycaprolactone/Polyurethane Loading Conjugated Linoleic Acid and Its Antiplatelet Adhesion. Int J Biomater 2017; 2017:5690625. [PMID: 28592972 PMCID: PMC5448153 DOI: 10.1155/2017/5690625] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 03/29/2017] [Accepted: 04/27/2017] [Indexed: 12/24/2022] Open
Abstract
Polycaprolactone/polyurethane (PCL/PU) fibrous scaffold was loaded with conjugated linoleic acid (CLA) by electrospinning method to improve the hemocompatibility of the polymeric surface. Fourier Transform Infrared Spectroscopy (FT-IR) analysis and Scanning Electron Microscopy (SEM) observation were employed to characterize the chemical structure and the changing morphology of electrospun PCL/PU and PCL/PU loaded with CLA (PCL/PU-CLA) scaffolds. Platelet adhesion and whole blood clot formation tests were used to evaluate the effect of CLA on antithrombotic property of PCL/PU-CLA scaffold. Endothelial cells (EC) were also seeded on the scaffold to examine the difference in the morphology of EC layer and platelet attachment with and without the presence of CLA. SEM results showed that CLA supported the spreading and proliferation of EC and PCL/PU-CLA surface induced lower platelet adhesion as well as attachment of other blood cells compared to the PCL/PU one. These results suggest that electrospinning method can successfully combine the antiplatelet effects of CLA to improve hemocompatibility of PCL/PU scaffolds for applications in artificial blood vessels.
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21
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Sun D, Zheng ZS, Liu MQ, Li BB, Huang F, Li DY. Structuring and characterization of a novel microporous PVDF membrane with semi-interpenetrating polymer networks for vacuum membrane distillation. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24514] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- De Sun
- Department of Chemical Engineering; Changchun University of Technology; 2055 Yanan Street, Changchun 130012 People's Republic of China
| | - Zhao-Shan Zheng
- Department of Chemical Engineering; Changchun University of Technology; 2055 Yanan Street, Changchun 130012 People's Republic of China
| | - Mei-Qin Liu
- Department of Chemical Engineering; Changchun University of Technology; 2055 Yanan Street, Changchun 130012 People's Republic of China
| | - Bing-Bing Li
- Department of Chemical Engineering; Changchun University of Technology; 2055 Yanan Street, Changchun 130012 People's Republic of China
| | - Fei Huang
- Department of Chemical Engineering; Changchun University of Technology; 2055 Yanan Street, Changchun 130012 People's Republic of China
| | - Da-Yong Li
- COFCO Bio-Chemical Energy (Yushu) Co, Ltd. Economic Development Wukeshu; 1 Dongfeng Street, Changchun 130033 People's Republic of China
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22
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Movafaghi S, Leszczak V, Wang W, Sorkin JA, Dasi LP, Popat KC, Kota AK. Hemocompatibility of Superhemophobic Titania Surfaces. Adv Healthc Mater 2017; 6. [PMID: 28000420 DOI: 10.1002/adhm.201600717] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 09/17/2016] [Indexed: 12/20/2022]
Abstract
The hemocompatibility of superhemophobic surfaces is investigated and compared with that of hemophobic surfaces and hemophilic surfaces. This analysis indicates that only those superhemophobic surfaces with a robust Cassie-Baxter state display significantly lower platelet adhesion and activation. It is envisioned that the understanding gained through this work will lead to the fabrication of improved hemocompatible, superhemophobic medical implants.
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Affiliation(s)
- Sanli Movafaghi
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - Victoria Leszczak
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - Wei Wang
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - Jonathan A. Sorkin
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - Lakshmi P. Dasi
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
- School of Biomedical Engineering; Colorado State University; Fort Collins CO 80523 USA
- Department of Biomedical Engineering; Dorothy Davis Heart and Lung Research Institute; Ohio State University; Columbus OH 43210 USA
| | - Ketul C. Popat
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
- School of Biomedical Engineering; Colorado State University; Fort Collins CO 80523 USA
| | - Arun K. Kota
- Department of Mechanical Engineering; Colorado State University; Fort Collins CO 80523 USA
- School of Biomedical Engineering; Colorado State University; Fort Collins CO 80523 USA
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23
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Santander-Borrego M, Taran E, Shadforth AMA, Whittaker AK, Chirila TV, Blakey I. Hydrogels with Lotus Leaf Topography: Investigating Surface Properties and Cell Adhesion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:485-493. [PMID: 28054787 DOI: 10.1021/acs.langmuir.6b03547] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The interactions of cells with the surface of materials is known to be influenced by a range of factors that include chemistry and roughness; however, it is often difficult to probe these factors individually without also changing the others. Here we investigate the role of roughness on cell adhesion while maintaining the same underlying chemistry. This was achieved by using a polymerization in mold technique to prepare poly(hydroxymethyl methacrylate) hydrogels with either a flat topography or a topography that replicated the microscale features of lotus leaves. These materials were then assessed for cell adhesion, and atomic force microscopy and contact angle analysis were then used to probe the physical reasons for the differing behavior in relation to cell adhesion.
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Affiliation(s)
- Miriem Santander-Borrego
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
| | - Elena Taran
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Australian National Fabrication Facility-Queensland Node , St. Lucia, Queensland 4072, Australia
| | - Audra M A Shadforth
- Queensland Eye Institute , 140 Melbourne Street, South Brisbane, Queensland 4101, Australia
| | - Andrew K Whittaker
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Centre for Advanced Imaging, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Queensland Eye Institute , 140 Melbourne Street, South Brisbane, Queensland 4101, Australia
| | - Traian V Chirila
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Faculty of Medicine and Biomedical Sciences, The University of Queensland , Herston Road, Herston, Queensland 4029, Australia
- Queensland Eye Institute , 140 Melbourne Street, South Brisbane, Queensland 4101, Australia
- Science & Engineering Faculty, Queensland University of Technology , 2 George Street Brisbane, Queensland 4001, Australia
- Faculty of Science, The University of Western Australia , Crawley, Western Australia 6009, Australia
| | - Idriss Blakey
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Centre for Advanced Imaging, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Queensland Eye Institute , 140 Melbourne Street, South Brisbane, Queensland 4101, Australia
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24
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Moradi S, Hadjesfandiari N, Toosi SF, Kizhakkedathu JN, Hatzikiriakos SG. Effect of Extreme Wettability on Platelet Adhesion on Metallic Implants: From Superhydrophilicity to Superhydrophobicity. ACS APPLIED MATERIALS & INTERFACES 2016; 8:17631-17641. [PMID: 27322889 DOI: 10.1021/acsami.6b03644] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In order to design antithrombotic implants, the effect of extreme wettability (superhydrophilicity to superhydrophobicity) on the biocompatibility of the metallic substrates (stainless steel and titanium) was investigated. The wettability of the surface was altered by chemical treatments and laser ablation methods. The chemical treatments generated different functionality groups and chemical composition as evident from XPS analysis. The micro/nanopatterning by laser ablation resulted in three different pattern geometry and different surface roughness and consequently wettability. The patterned surface were further modified with chemical treatments to generate a wide range of surface wettability. The influence of chemical functional groups, pattern geometry, and surface wettability on protein adsorption and platelet adhesion was studied. On chemically treated flat surfaces, the type of hydrophilic treatment was shown to be a contributing factor that determines the platelet adhesion, since the hydrophilic oxidized substrates exhibit less platelet adhesion in comparison to the control untreated or acid treated surfaces. Also, the surface morphology, surface roughness, and superhydrophobic character of the surfaces are contributing factors to platelet adhesion on the surface. Our results show that superhydrophobic cauliflower-like patterns are highly resistant to platelet adhesion possibly due to the stability of Cassie-Baxter state for this pattern compared to others. Our results also show that simple surface treatments on metals offer a novel way to improve the hemocompatibility of metallic substrates.
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Affiliation(s)
- Sona Moradi
- Department of Chemical and Biological Engineering, ‡Centre for Blood Research, Pathology and Laboratory Medicine, Life Science Centre, and §Department of Chemistry, University of British Columbia , Vancouver, British Columbia V6T 1Z3, Canada
| | - Narges Hadjesfandiari
- Department of Chemical and Biological Engineering, ‡Centre for Blood Research, Pathology and Laboratory Medicine, Life Science Centre, and §Department of Chemistry, University of British Columbia , Vancouver, British Columbia V6T 1Z3, Canada
| | - Salma Fallah Toosi
- Department of Chemical and Biological Engineering, ‡Centre for Blood Research, Pathology and Laboratory Medicine, Life Science Centre, and §Department of Chemistry, University of British Columbia , Vancouver, British Columbia V6T 1Z3, Canada
| | - Jayachandran N Kizhakkedathu
- Department of Chemical and Biological Engineering, ‡Centre for Blood Research, Pathology and Laboratory Medicine, Life Science Centre, and §Department of Chemistry, University of British Columbia , Vancouver, British Columbia V6T 1Z3, Canada
| | - Savvas G Hatzikiriakos
- Department of Chemical and Biological Engineering, ‡Centre for Blood Research, Pathology and Laboratory Medicine, Life Science Centre, and §Department of Chemistry, University of British Columbia , Vancouver, British Columbia V6T 1Z3, Canada
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25
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Yilbas BS, Yousaf MR, Ali H, Al-Aqeeli N. Replication of laser-textured alumina surfaces by polydimethylsiloxane: Improvement of surface hydrophobicity. J Appl Polym Sci 2016. [DOI: 10.1002/app.44015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Bekir Sami Yilbas
- Center of Research Excellence in Renewable Energy; KFUPM; Dhahran 31261 Saudi Arabia
- ME Department; KFUPM; Dhahran 31261 Saudi Arabia
| | | | - H. Ali
- ME Department; KFUPM; Dhahran 31261 Saudi Arabia
| | - N. Al-Aqeeli
- ME Department; KFUPM; Dhahran 31261 Saudi Arabia
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26
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Bark DL, Vahabi H, Bui H, Movafaghi S, Moore B, Kota AK, Popat K, Dasi LP. Hemodynamic Performance and Thrombogenic Properties of a Superhydrophobic Bileaflet Mechanical Heart Valve. Ann Biomed Eng 2016; 45:452-463. [PMID: 27098219 DOI: 10.1007/s10439-016-1618-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 04/13/2016] [Indexed: 10/21/2022]
Abstract
In this study, we explore how blood-material interactions and hemodynamics are impacted by rendering a clinical quality 25 mm St. Jude Medical Bileaflet mechanical heart valve (BMHV) superhydrophobic (SH) with the aim of reducing thrombo-embolic complications associated with BMHVs. Basic cell adhesion is evaluated to assess blood-material interactions, while hemodynamic performance is analyzed with and without the SH coating. Results show that a SH coating with a receding contact angle (CA) of 160° strikingly eliminates platelet and leukocyte adhesion to the surface. Alternatively, many platelets attach to and activate on pyrolytic carbon (receding CA = 47), the base material for BMHVs. We further show that the performance index increases by 2.5% for coated valve relative to an uncoated valve, with a maximum possible improved performance of 5%. Both valves exhibit instantaneous shear stress below 10 N/m2 and Reynolds Shear Stress below 100 N/m2. Therefore, a SH BMHV has the potential to relax the requirement for antiplatelet and anticoagulant drug regimens typically required for patients receiving MHVs by minimizing blood-material interactions, while having a minimal impact on hemodynamics. We show for the first time that SH-coated surfaces may be a promising direction to minimize thrombotic complications in complex devices such as heart valves.
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Affiliation(s)
- David L Bark
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA.,School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Hamed Vahabi
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Hieu Bui
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Sanli Movafaghi
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Brandon Moore
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Arun K Kota
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA.,School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Ketul Popat
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA.,School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Lakshmi P Dasi
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA. .,School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA. .,Department of Biomedical Engineering, Dorothy Davis Heart and Lung Research Institute, 473 W 12th Avenue, Columbus, OH, 43210, USA.
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27
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Shen G, Hu Z, Liu Z, Wen R, Tang X, Yu Y. Fabrication of a superhydrophilic epoxy resin surface via polymerization-induced viscoelastic phase separation. RSC Adv 2016. [DOI: 10.1039/c6ra03832h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A superhydrophilic epoxy resin surface was fabricated through polymerization-induced viscoelastic phase separation, which could be eliminated by chain disentanglement.
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Affiliation(s)
- Gebin Shen
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
| | - Zhongnan Hu
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
| | - Zhuoyu Liu
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
| | - Ruiheng Wen
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
| | - Xiaolin Tang
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
| | - Yingfeng Yu
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
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28
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Yang B, Duan X, Huang J. Ultrathin, biomimetic, superhydrophilic layers of cross-linked poly(phosphobetaine) on polyethylene by photografting. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:1120-1126. [PMID: 25549110 DOI: 10.1021/la5031137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ultrathin, biomimetic, superhydrophilic hydrogel layers, composed of cross-linked poly(2-methacryloyloxyethyl phosphorylcholine), are formed on low-density polyethylene films via ultraviolet-initiated surface graft polymerization. The layers are 19-58 nm thick as revealed by electron microscopy and have three-dimensional networks; the unique network structure, along with its zwitterionic nature, rather than surface roughness results in superhydrophilicity, that is, the water contact angle around 5°. This superhydrophilicity depends on a variety of factors, including the concentration of the monomer and cross-linker, the type of reaction solvents, the reaction and drying time, the intensity of UV light, and the way of measurement of water contact angles. Superhydrophilicity is obtained under a fixed ratio (e.g., 1/1) of the monomer to cross-linker, a reaction time over 120 s, a short drying time, (75%) ethanol as the reaction solvent, and low-intensity UV light, largely because these factors together generate optimal three-dimensional networks of cross-links.
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Affiliation(s)
- Biao Yang
- School of Materials Science and Mechanical Engineering, Beijing Technology and Business University , Beijing 100048, P. R. China
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29
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Lima AC, Mano JF. Micro/nano-structured superhydrophobic surfaces in the biomedical field: part II: applications overview. Nanomedicine (Lond) 2015; 10:271-97. [DOI: 10.2217/nnm.14.175] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The properties of surfaces define the acceptance and integration of biomaterials in vivo, as well as the material's efficiency when used at research or manufacturing levels. The presence of micro/nano-topographical structures and low surface energies could bring several advantages when highly repellent surfaces are employed in the biomedical field. Biomimetic superhydrophobic surfaces have been explored for diverse applications: as an intrinsic characteristic of biomaterials to be implanted; as materials that exhibit special interactions with biological entities; or to be used in ex vivo applications. This article aims to focus on the main motivations and requirements in the biomedical field that pushed for the utilization of superhydrophobic surfaces as suitable alternatives, as well as the great evolution of applications that have emerged in the last few years.
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Affiliation(s)
- Ana Catarina Lima
- 3B's Research Group – Biomaterials, Biodegradables & Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Ave Park, 4806-909 Taipas, Guimarães, Portugal
- ICVS/3B's – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João F Mano
- 3B's Research Group – Biomaterials, Biodegradables & Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Ave Park, 4806-909 Taipas, Guimarães, Portugal
- ICVS/3B's – PT Government Associate Laboratory, Braga/Guimarães, Portugal
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30
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Superhydrophobic and Self-cleaning Macrosize Surfaces of Silicone Rubber and Its Mechanical Flexibility. BIONANOSCIENCE 2014. [DOI: 10.1007/s12668-014-0146-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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31
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An J, Cui JF, Zhu ZQ, Liang WD, Pei CJ, Sun HX, Yang BP, Li A. Conductive polymer-coated mesh films with tunable surface wettability for separation of oils and organics from water. J Appl Polym Sci 2014. [DOI: 10.1002/app.40759] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Jin An
- Department of Chemical Engineering; College of Petrochemical Engineering; Lanzhou University of Technology; Lanzhou People's Republic of China
| | - Jin-Feng Cui
- Department of Chemical Engineering; College of Petrochemical Engineering; Lanzhou University of Technology; Lanzhou People's Republic of China
| | - Zhao-Qi Zhu
- Department of Chemical Engineering; College of Petrochemical Engineering; Lanzhou University of Technology; Lanzhou People's Republic of China
| | - Wei-Dong Liang
- Department of Chemical Engineering; College of Petrochemical Engineering; Lanzhou University of Technology; Lanzhou People's Republic of China
| | - Chun-Juan Pei
- Department of Chemical Engineering; College of Petrochemical Engineering; Lanzhou University of Technology; Lanzhou People's Republic of China
| | - Han-Xue Sun
- Department of Chemical Engineering; College of Petrochemical Engineering; Lanzhou University of Technology; Lanzhou People's Republic of China
| | - Bao-Ping Yang
- Department of Chemical Engineering; College of Petrochemical Engineering; Lanzhou University of Technology; Lanzhou People's Republic of China
| | - An Li
- Department of Chemical Engineering; College of Petrochemical Engineering; Lanzhou University of Technology; Lanzhou People's Republic of China
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32
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Kalinova R, Mincheva R, Dubois P. Imparting Adhesion Property to Silicone Materials. ACTA ACUST UNITED AC 2014. [DOI: 10.7569/raa.2014.097302] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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33
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Superhydrophobic Surfaces: Beyond Lotus Effect. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/978-1-4614-5372-7_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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34
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Smith KEC, Rein A, Trapp S, Mayer P, Karlson UG. Dynamic passive dosing for studying the biotransformation of hydrophobic organic chemicals: microbial degradation as an example. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:4852-4860. [PMID: 22458885 DOI: 10.1021/es204050u] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Biotransformation plays a key role in hydrophobic organic compound (HOC) fate, and understanding kinetics as a function of (bio)availability is critical for elucidating persistence, accumulation, and toxicity. Biotransformation mainly occurs in an aqueous environment, posing technical challenges for producing kinetic data because of low HOC solubilities and sorptive losses. To overcome these, a new experimental approach based on passive dosing is presented. This avoids using cosolvent for introducing the HOC substrate, buffers substrate depletion so biotransformation is measured within a narrow and defined dissolved concentration range, and enables high compound turnover even at low concentrations to simplify end point measurement. As a case study, the biodegradation kinetics of two model HOCs by the bacterium Sphingomonas paucimobilis EPA505 were measured at defined dissolved concentrations ranging over 4 orders of magnitude, from 0.017 to 658 μg L(-1) for phenanthrene and from 0.006 to 90.0 μg L(-1) for fluoranthene. Both compounds had similar mineralization fluxes, and these increased by 2 orders of magnitude with increasing dissolved concentrations. First-order mineralization rate constants were also similar for both PAHs, but decreased by around 2 orders of magnitude with increasing dissolved concentrations. Dynamic passive dosing is a useful tool for measuring biotransformation kinetics at realistically low and defined dissolved HOC concentrations.
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Affiliation(s)
- Kilian E C Smith
- Department of Environmental Science, Aarhus University, Frederiksborgvej 399, P.O. Box 358, 4000 Roskilde, Denmark.
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35
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Biocompatibility and antimicrobial activity of poly(3-hydroxyoctanoate) grafted with vinylimidazole. Int J Biol Macromol 2012; 50:310-6. [DOI: 10.1016/j.ijbiomac.2011.12.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Revised: 12/12/2011] [Accepted: 12/13/2011] [Indexed: 11/20/2022]
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36
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Cho KH, Chen LJ. Fabrication of sticky and slippery superhydrophobic surfaces via spin-coating silica nanoparticles onto flat/patterned substrates. NANOTECHNOLOGY 2011; 22:445706. [PMID: 21979566 DOI: 10.1088/0957-4484/22/44/445706] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Silica nanoparticles were spin-coated onto a flat/patterned (regular pillar-like) substrate to enhance the surface roughness. The surface was further modified by a self-assembled fluorosilanated monolayer. The advancing/receding contact angle and sliding angle measurements were performed to determine the wetting behavior of a water droplet on the surface. It is interesting to find that a transition from a Wenzel surface to a sticky superhydrophobic surface is observed due to the spin-coating silica nanoparticles. A slippery superhydrophobic surface can be further obtained after secondary spin-coating with silica nanoparticles to generate a multi-scale roughness structure. The prepared superhydrophobic substrates should be robust for practical applications. The adhesion between the substrate and nanoparticles is also examined and discussed.
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Affiliation(s)
- Kuan-Hung Cho
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
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37
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Wu T, Pan Y, Li L. Fabrication of superhydrophobic hybrids from multiwalled carbon nanotubes and poly(vinylidene fluoride). Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.03.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Shourgashti Z, Khorasani M, Khosroshahi S. Plasma-induced grafting of polydimethylsiloxane onto polyurethane surface: Characterization and in vitro assay. Radiat Phys Chem Oxf Engl 1993 2010. [DOI: 10.1016/j.radphyschem.2010.04.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Wu T, Pan Y, Li L. Study on superhydrophobic hybrids fabricated from multiwalled carbon nanotubes and stearic acid. J Colloid Interface Sci 2010; 348:265-70. [DOI: 10.1016/j.jcis.2010.04.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 04/02/2010] [Accepted: 04/03/2010] [Indexed: 11/26/2022]
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40
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Zhang L, Zhang X, Dai Z, Wu J, Zhao N, Xu J. Micro–nano hierarchically structured nylon 6,6 surfaces with unique wettability. J Colloid Interface Sci 2010; 345:116-9. [DOI: 10.1016/j.jcis.2010.01.044] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 01/11/2010] [Accepted: 01/14/2010] [Indexed: 10/19/2022]
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41
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Yang Y, Lai Y, Zhang Q, Wu K, Zhang L, Lin C, Tang P. A novel electrochemical strategy for improving blood compatibility of titanium-based biomaterials. Colloids Surf B Biointerfaces 2010; 79:309-13. [PMID: 20466524 DOI: 10.1016/j.colsurfb.2010.04.013] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Revised: 04/14/2010] [Accepted: 04/15/2010] [Indexed: 10/19/2022]
Abstract
A controllable fabrication of superhydrophobic surface on titanium biomedical implants was successfully developed to improve the blood compatibility and anti-coagulation performance of biomedical implants. The electrochemical anodization was employed to form a layer of TiO(2) nanotubes on the titanium substrate, and then a hydrophobic monolayer was self-assembled on the nanotube surface. The morphology and wettability of the nanotube arrays were investigated by scanning electron microcopy and water drop contact angle measurement, respectively. From the in vitro blood compatibility evaluation, it was observed that not only very few of platelets were attached onto the superhydrophobic surface, but also the attached platelets were not activated in this condition. Comparatively, a large number of platelets adhered and spread out on both the bare titanium substrate and the superhydrophilic surface which was obtained by exposing the TiO(2) nanotubes under a UV irradiation. The results indicated that the superhydrophobic TiO(2) nanotube layers exhibited excellent blood compatibility and remarkable performance in preventing platelets from adhering to the implant surface. Therefore, the construction of superhydrophobic surface on biomedical implants could pave a way to improve the blood compatibility of the biomedical devices and implants.
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Affiliation(s)
- Yun Yang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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42
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Patel P, Choi CK, Meng DD. Superhydrophilic Surfaces for Antifoqging and Antifouling Microfluidic Devices. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.jala.2009.10.012] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Superhydrophilic surfaces are investigated for their potential to provide antifogging and antifouling properties for microfluidic devices. Two types of exemplary superhydrophilic surfaces are prepared, including polyester films treated by oxygen plasma and indium tin oxide-coated glasses treated by an electrochemical method. The superhydrophilicity of the treated surfaces presented herein is confirmed by their near-zero water contact angles. Their corresponding antifogging and antifouling capability is examined. The fluorescence microscopic study has confirmed the significantly reduced adhesion of the fluorescein and fluorescent proteins after the surfaces are treated to be superhydrophilic, indicating their potential for antifouling applications. The degradation of the superhydrophilicity under different humidity conditions is also investigated.
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Affiliation(s)
- Pragneshkumar Patel
- Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, Houghton, MI
| | - Chang K. Choi
- Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, Houghton, MI
| | - Dennis Desheng Meng
- Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, Houghton, MI
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43
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Alves NM, Shi J, Oramas E, Santos JL, Tomás H, Mano JF. Bioinspired superhydrophobic poly(L-lactic acid) surfaces control bone marrow derived cells adhesion and proliferation. J Biomed Mater Res A 2010; 91:480-8. [PMID: 18985759 DOI: 10.1002/jbm.a.32210] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The aptitude of a cell to adhere, migrate, and differentiate on a compact substrate or scaffold is important in the field of tissue engineering and biomaterials. It is well known that cell behavior can be controlled and guided through the change in micro- and nano-scale topographic features. In this work, we intend to demonstrate that special topographic features that control wettability may also have an important role in the biological performance of biodegradable substrates. Poly(L-lactic acid) surfaces with superhydrophobic characteristics were produced, based on the so-called Lotus effect, exhibiting dual micro- and nano-scale roughness. The water contact angle could be higher than 150 degrees and a value of that order could be kept even upon immersion in a simulated body fluid solution for more than 20 days. Such water repellent surfaces were found to prevent adhesion and proliferation of bone marrow derived cells previously isolated from the femurs of 6-week-old male Wistar rats, when compared with smoother surfaces prepared by simple solvent casting. Such results demonstrate that these superhydrophobic surfaces may be used to control cell behavior onto biodegradable substrates.
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Affiliation(s)
- Natália M Alves
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Campus de Gualtar, Braga, Portugal
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44
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Wu J, Bai HJ, Zhang XB, Xu JJ, Chen HY. Thermal/plasma-driven reversible wettability switching of a bare gold film on a poly(dimethylsiloxane) surface by electroless plating. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1191-1198. [PMID: 19722553 DOI: 10.1021/la902332q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report an approach for fabricating a tunable wettability surface by electroless gold plating on poly(dimethylsiloxane) (PDMS). A two-layer structured gold film with a tight layer and a loose layer can be obtained on the surface of a PDMS chip when the PDMS chip is immersed in a gold plating solution at 30 degrees C for 4 h. Its wettability can be rapidly switched between superhydrophilicity and superhydrophobicity by plasma and heat treatments without any self-assembled monolayer, and the superhydrophobicity can be even changed from the gecko-foot-hair-like character to the lotus-leaf-like character. Benefiting from the various wettabilities of the prepared gold/PDMS composites, protein patterning is successfully achieved on a patterned superhydrophobic/superhydrophilic gold/PDMS composite; a superhydrophobic needle for transferring supersmall water droplets (1 microL) to a superhydrophobic surface is successfully fabricated.
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Affiliation(s)
- Jian Wu
- The Key Lab of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
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45
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Ren HX, Chen X, Huang XJ, Im M, Kim DH, Lee JH, Yoon JB, Gu N, Liu JH, Choi YK. A conventional route to scalable morphology-controlled regular structures and their superhydrophobic/hydrophilic properties for biochips application. LAB ON A CHIP 2009; 9:2140-2144. [PMID: 19606289 DOI: 10.1039/b905804d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We use a conventional and straightforward route to fabricate scalable morphology-controlled regular structures. This route is based on the etching of PDMS microlens array in CF4 and CF4/O2 plasma. PDMS microlens array can be changed to regularly isolated microdot structures array in CF4 plasma. Microbowl shaped structures array can be reached in CF4/O2 plasma. Moreover, a set of structures after CF4 plasma treatment display superhydrophobicity, while a set of structures after CF4/O2 plasma treatment present hydrophilicity. DNA molecules can be readily enriched on the hydrophilic surface. We believe that the regular structure array surfaces provide a useful inspiration towards biomolecular detection and transportation in biochips.
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Affiliation(s)
- Hong-Xuan Ren
- School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210098, PR China
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46
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Khorasani MT, Mirzadeh H, Irani S. Comparison of fibroblast and nerve cells response on plasma treated poly (L-lactide) surface. J Appl Polym Sci 2009. [DOI: 10.1002/app.29813] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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47
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Huang XJ, Kim DH, Im M, Lee JH, Yoon JB, Choi YK. "Lock-and-key" geometry effect of patterned surfaces: wettability and switching of adhesive force. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2009; 5:90-94. [PMID: 19040219 DOI: 10.1002/smll.200800649] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- Xing-Jiu Huang
- Nano-Oriented Bio-Electronic Lab, School of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, South Korea.
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48
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Ting WH, Chen CC, Dai SA, Suen SY, Yang IK, Liu YL, Chen FMC, Jeng RJ. Superhydrophobic waxy-dendron-grafted polymer films via nanostructure manipulation. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b900468h] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Liu Y, Chen X, Xin JH. Hydrophobic duck feathers and their simulation on textile substrates for water repellent treatment. BIOINSPIRATION & BIOMIMETICS 2008; 3:046007. [PMID: 18997276 DOI: 10.1088/1748-3182/3/4/046007] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Inspired by the non-wetting phenomena of duck feathers, the water repellent property of duck feathers was studied at the nanoscale. The microstructures of the duck feather were investigated by a scanning electron microscope (SEM) imaging method through a step-by-step magnifying procedure. The SEM results show that duck feathers have a multi-scale structure and that this multi-scale structure as well as the preening oil are responsible for their super hydrophobic behavior. The microstructures of the duck feather were simulated on textile substrates using the biopolymer chitosan as building blocks through a novel surface solution precipitation (SSP) method, and then the textile substrates were further modified with a silicone compound to achieve low surface energy. The resultant textiles exhibit super water repellent properties, thus providing a simple bionic way to create super hydrophobic surfaces on soft substrates using flexible material as building blocks.
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Affiliation(s)
- Yuyang Liu
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China.
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50
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Shi J, Alves NM, Mano JF. Towards bioinspired superhydrophobic poly(L-lactic acid) surfaces using phase inversion-based methods. BIOINSPIRATION & BIOMIMETICS 2008; 3:034003. [PMID: 18626131 DOI: 10.1088/1748-3182/3/3/034003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The water repellency and self-cleaning ability of many biological surfaces has inspired many fundamental and practical studies related to the development of synthetic superhydrophobic surfaces. However, the investigation of such substrates made of biodegradable polymers has been scarce. Simple approaches based on a single step, performed at room temperature (and pressure), were implemented to obtain superhydrophobic poly(L-lactic acid) (PLLA) surfaces via phase inversion-based methods, without addition of low-surface-energy compounds. Water contact angles above 150 degrees were obtained using some processing conditions. In such cases scanning electronic microscopy micrographs of such surfaces revealed a clear rough texture composed by leafy clusters with micro-nano binary structures. Such materials could be used in specific environmental and biomedical applications, namely in implantable materials or in antibacterial or antithrombogenic surfaces.
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Affiliation(s)
- Jun Shi
- 3B's Research Group, Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal and IBB, Institute for Biotechnology and Bioengineering, Braga, Portugal
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