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Tian R, Lu J, Xu Z, Zhang W, Liu J, Wang L, Xie Y, Zhao Y, Cao X, Luo Y. Unraveling the Synergistic Reaction and the Deactivation Mechanism for the Catalytic Degradation of Double Components of Sulfur-Containing VOCs over ZSM-5-Based Materials. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 57:1443-1455. [PMID: 36196013 DOI: 10.1021/acs.est.2c04033] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The competitive adsorption behavior, the synergistic catalytic reaction, and deactivation mechanisms under double components of sulfur-containing volatile organic compounds (VOCs) are a bridge to solve their actual pollution problems. However, they are still unknown. Herein, simultaneous catalytic decomposition of methyl mercaptan (CH3SH) and ethyl mercaptan (C2H5SH) is investigated over lanthanum (La)-modified ZSM-5, and kinetic and thermodynamic results confirm a great difference in the adsorption property and catalytic transformation behavior. Meanwhile, the new synergistic reaction and deactivation mechanisms are revealed at the molecular level by combining with in situ diffuse reflectance infrared spectroscopy (in situ DRIFTS) and density functional theory (DFT) calculations. The CH3CH2* and SH* groups are presented in decomposing C2H5SH, while the new species of CH2*, active H* and S*, instead of CH3* and SH*, are proved as the key elementary groups in decomposing CH3SH. The competitive recombining of SH* in C2H5SH with highly active H* in dimethyl sulfide (CH3SCH3), an intermediate in decomposing CH3SH, would aggravate the deposition of carbon and sulfur. La/ZSM-5 exhibits potential environmental application due to the excellent stability of 200 h and water resistance. This work gives an understanding of the adsorption, catalysis, reaction, and deactivation mechanisms for decomposing double components of sulfur-containing VOCs.
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Affiliation(s)
- Rui Tian
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming650500, P. R. China
| | - Jichang Lu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming650500, P. R. China
| | - Zhizhi Xu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming650500, P. R. China
| | - Wenjun Zhang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming650500, P. R. China
| | - Jiangping Liu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming650500, P. R. China
| | - Langlang Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
| | - Yibing Xie
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
| | - Yutong Zhao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming650500, P. R. China
| | - Xiaohua Cao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming650500, P. R. China
| | - Yongming Luo
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming650500, P. R. China
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Highly efficient chlorinated solvent uptake by novel covalent organic networks via thiol-ene chemistry. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03809-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jucius D, Gudaitis R, Lazauskas A, Grigaliūnas V. Electrical Characterization of Thin PEDOT:PSS Films on Alumina and Thiol-Ene Substrates. Polymers (Basel) 2021; 13:polym13203519. [PMID: 34685277 PMCID: PMC8541043 DOI: 10.3390/polym13203519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/05/2021] [Accepted: 10/07/2021] [Indexed: 11/16/2022] Open
Abstract
Transparent polymer layers that heal minor scratches and maintain the optical properties of the devices for a long time are highly desirable in optoelectronics. This paper presents the results of the electrical characterization of thin PEDOT:PSS films on the novel, optically transparent thiol-ene substrates capable of healing scratches under room-temperature conditions. Electrical properties of the PEDOT:PSS films deposited on the conventional alumina ceramic substrates were also tested for comparative purposes. This study demonstrated that the substrate can have a significant effect on the electrical properties of PEDOT:PSS films, and the electrical resistance of the films on thiol-ene substrates is not as stable as on alumina ceramics. However, the changes in electrical resistance of the films on thiol-ene are small enough over a sufficiently wide range of operating temperatures and relative humidities and allow the application of such bilayers in various polymeric optoelectronic devices.
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Lazauskas A, Jucius D, Abakevičienė B, Guobienė A, Andrulevičius M. Trilayer Composite System Based on SiO 2, Thiol-Ene, and PEDOT:PSS. Focus on Stability after Thermal Treatment and Solar Irradiance. Polymers (Basel) 2021; 13:polym13193439. [PMID: 34641254 PMCID: PMC8512558 DOI: 10.3390/polym13193439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/04/2021] [Accepted: 10/06/2021] [Indexed: 12/03/2022] Open
Abstract
The trilayer composite was fabricated by combining functional layers of fumed SiO2, thiol-ene, and poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT-PSS). Optical, scratch-healing, non-wetting, and electrical stability was investigated at different instances of time after thermal and solar irradiance treatment. The trilayer composite was found to be optically stable and highly transparent for visible light after thermal and irradiance treatment for 25 h. Both treatment processes had a minor effect on the shape-memory assisted scratch-healing performance of the trilayer composite. Thermal treatment and solar irradiance did not affect the superhydrophobic properties (contact angle 170 ± 1°) of the trilayer composite. The sheet resistance increased from 90 ± 3 Ω/square (initial) to 109 ± 3 Ω/square (thermal) and 149 ± 3 Ω/square (irradiance) after 25 h of treatment, which was considered as not significant change.
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Affiliation(s)
- Algirdas Lazauskas
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania; (D.J.); (B.A.); (A.G.); (M.A.)
- Correspondence: ; Tel.: +370-671-73375
| | - Dalius Jucius
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania; (D.J.); (B.A.); (A.G.); (M.A.)
| | - Brigita Abakevičienė
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania; (D.J.); (B.A.); (A.G.); (M.A.)
- Department of Physics, Faculty of Mathematics and Natural Sciences, Kaunas University of Technology, Studentų Str. 50, LT51423 Kaunas, Lithuania
| | - Asta Guobienė
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania; (D.J.); (B.A.); (A.G.); (M.A.)
| | - Mindaugas Andrulevičius
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania; (D.J.); (B.A.); (A.G.); (M.A.)
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Weigel N, Männel MJ, Thiele J. Flexible Materials for High-Resolution 3D Printing of Microfluidic Devices with Integrated Droplet Size Regulation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:31086-31101. [PMID: 34176257 PMCID: PMC8267847 DOI: 10.1021/acsami.1c05547] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
We develop resins for high-resolution additive manufacturing of flexible micromaterials via projection microstereolithography (PμSL) screening formulations made from monomer 2-phenoxyethyl acrylate, the cross-linkers Ebecryl 8413, tri(propyleneglycol) diacrylate or 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, the photoabsorber Sudan 1, and the photoinitiator diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide. PμSL-printed polymer micromaterials made from this resin library are characterized regarding achievable layer thickness depending on UV exposure energy, and for mechanical as well as optical properties. The best-candidate resin from this screening approach allows for 3D-printing transparent microchannels with a minimum cross section of approximately 35 × 46 μm2, which exhibit proper solvent resistance against water, isopropanol, ethanol, n-hexane, and HFE-7500. The mechanical properties are predestined for 3D-printing microfluidic devices with integrated functional units that require high material flexibility. Exemplarily, we design flexible microchannels for on-demand regulation of microdroplet sizes in microemulsion formation. Our two outlines of integrated droplet regulators operate by injecting defined volumes of air, which deform the droplet-forming microchannel cross-junction, and change the droplet size therein. With this study, we expand the library of functional resins for PμSL printing toward flexible materials with micrometer resolution and provide the basis for further exploration of these materials, e.g., as microstructured cell-culturing substrates with defined mechanics.
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Abstract
Shape memory alloys, materials capable of being deformed and maintaining the deformation and additionally capable of returning to the initial position, are valued for a range of applications from actuators to flexible microdevices. Maintaining the properties that make them useful, their ability to deform and reform, requires that shape memory alloys must be protected against corrosion, in which the integration of shape memory polymers can act as a means of protection. Thus, this review is to highlight the utility of self-healing shape memory polymers as a means of corrosion inhibition. Therefore, this review discusses the benefits of utilizing self-healing shape memory polymers for the protection of shape memory, several types of self-healing polymers that could be used, means of improving or tailoring the polymers towards specific usages, and future prospects in designing a shape memory polymer for use in corrosion inhibition.
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Abakevičienė B, Guobienė A, Jucius D, Lazauskas A. Free-Standing Composite Films Based on Thiol-Ene and PEDOT: PSS Layers for Optoelectronic Applications. Polymers (Basel) 2021; 13:polym13081299. [PMID: 33921085 PMCID: PMC8071385 DOI: 10.3390/polym13081299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/09/2021] [Accepted: 04/14/2021] [Indexed: 01/11/2023] Open
Abstract
Free-standing composite films were fabricated by combining the plane parallel layers of thiol-ene based on pentaerythritol tetrakis(3-mercaptopropionate)-1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (PETMP-TTT) UV curable polymer and poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) conductive polymer. A systematic analysis was performed with the focus on mechanical performance of the free-standing composite films. The PEDOT:PSS/PETMP-TTT composite exhibited higher values of adhesion force compared to the free-standing PETMP-TTT film due to hydrophilic nature of the PEDOT:PSS layer. The composite was found to be highly transparent in the range of 380–800 nm. The Young’s modulus and tensile strength of PETMP-TTT were found to be 3.6 ± 0.4 GPa and 19 ± 3 MPa, while for PEDOT:PSS/PETMP-TTT to be 3.5 ± 0.3 GPa and 20 ± 3 MPa, respectively. The sheet resistance values of the PEDOT:PSS layer in the composite film were found to be highly stable after a number of bending iterations with slight increase in sheet resistance from 108 to 118 ± 2 Ω/□. The resultant PEDOT:PSS/PETMP-TTT composite can be further used in optoelectronic applications.
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Affiliation(s)
- Brigita Abakevičienė
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania; (B.A.); (A.G.); (A.L.)
- Department of Physics, Kaunas University of Technology, Studentų str. 50, LT51423 Kaunas, Lithuania
| | - Asta Guobienė
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania; (B.A.); (A.G.); (A.L.)
| | - Dalius Jucius
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania; (B.A.); (A.G.); (A.L.)
- Correspondence: ; Tel.: +37-03-731-3432
| | - Algirdas Lazauskas
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania; (B.A.); (A.G.); (A.L.)
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Special Issue: Photoactive Materials: Synthesis, Applications and Technology. MATERIALS 2021; 14:ma14030585. [PMID: 33513834 PMCID: PMC7865794 DOI: 10.3390/ma14030585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 01/25/2021] [Indexed: 11/17/2022]
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Alabiso W, Hron TM, Reisinger D, Bautista-Anguís D, Schlögl S. Shape memory-assisted self-healing of dynamic thiol-acrylate networks. Polym Chem 2021. [DOI: 10.1039/d1py00925g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By following shape-memory assisted self-healing (SMASH), we used the shape-memory properties of thiol-acrylate photopolymers to physically close a scratch, whilst chemical healing was obtained via thermo-activated dynamic exchange reactions.
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Affiliation(s)
- Walter Alabiso
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, A-8700 Leoben, Austria
| | - Tiago Manuel Hron
- Montanuniversität Leoben, Otto Glöckel-Straße 2/IV, 8700 Leoben, Austria
| | - David Reisinger
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, A-8700 Leoben, Austria
| | | | - Sandra Schlögl
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, A-8700 Leoben, Austria
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Hot Embossing of Micro-Pyramids into Thermoset Thiol-Ene Film. Polymers (Basel) 2020; 12:polym12102291. [PMID: 33036296 PMCID: PMC7600293 DOI: 10.3390/polym12102291] [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: 09/03/2020] [Revised: 10/02/2020] [Accepted: 10/05/2020] [Indexed: 11/16/2022] Open
Abstract
This paper presents the first attempt to texturize a fully crosslinked thermoset shape memory polymer using a hot embossing technique. UV-cured thiol-ene films were successfully embossed with anisotropically-etched Si (100) stamps at a temperature of 100 °C, which is about 50 °C above the glass transition temperature of the polymer. The low storage modulus of the polymer in a rubbery state allowed us to permanently emboss random micro-pyramidal patterns onto the surface of the film with high fidelity by applying 30 MPa pressure for 1 h. Atomic force microscopy (AFM) investigation showed perfect replication of the stamp micropattern with typical height of the largest inverted pyramids close to 0.7 µm and lateral dimensions in the range of 1–2 µm. Changes in surface roughness parameters of the embossed thiol-ene films after annealing them at 100 °C for 1 h or storing for 2 months in air at standard room conditions were negligible. The achieved results open new perspectives for the simple and inexpensive hot embossing technique to be applied for the micropatterning of prepolymerized thermoset shape memory films as an alternative to micropatterning using UV casting.
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Al-Qatatsheh A, Morsi Y, Zavabeti A, Zolfagharian A, Salim N, Z. Kouzani A, Mosadegh B, Gharaie S. Blood Pressure Sensors: Materials, Fabrication Methods, Performance Evaluations and Future Perspectives. SENSORS (BASEL, SWITZERLAND) 2020; 20:E4484. [PMID: 32796604 PMCID: PMC7474433 DOI: 10.3390/s20164484] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/31/2020] [Accepted: 08/04/2020] [Indexed: 12/14/2022]
Abstract
Advancements in materials science and fabrication techniques have contributed to the significant growing attention to a wide variety of sensors for digital healthcare. While the progress in this area is tremendously impressive, few wearable sensors with the capability of real-time blood pressure monitoring are approved for clinical use. One of the key obstacles in the further development of wearable sensors for medical applications is the lack of comprehensive technical evaluation of sensor materials against the expected clinical performance. Here, we present an extensive review and critical analysis of various materials applied in the design and fabrication of wearable sensors. In our unique transdisciplinary approach, we studied the fundamentals of blood pressure and examined its measuring modalities while focusing on their clinical use and sensing principles to identify material functionalities. Then, we carefully reviewed various categories of functional materials utilized in sensor building blocks allowing for comparative analysis of the performance of a wide range of materials throughout the sensor operational-life cycle. Not only this provides essential data to enhance the materials' properties and optimize their performance, but also, it highlights new perspectives and provides suggestions to develop the next generation pressure sensors for clinical use.
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Affiliation(s)
- Ahmed Al-Qatatsheh
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Yosry Morsi
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Ali Zavabeti
- Department of Chemical Engineering, The University of Melbourne, Parkville VIC 3010, Australia;
| | - Ali Zolfagharian
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
| | - Nisa Salim
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Abbas Z. Kouzani
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
| | - Bobak Mosadegh
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medicine, New York, NY 10065, USA;
| | - Saleh Gharaie
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
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Idumah CI, Odera SR. Recent advancement in self-healing graphene polymer nanocomposites, shape memory, and coating materials. POLYM-PLAST TECH MAT 2020. [DOI: 10.1080/25740881.2020.1725816] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Christopher Igwe Idumah
- Faculty of Engineering, Department of Polymer and Textile Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
- Enhanced Polymer Research Group, EnPro, Universiti Teknologi Malaysia, Skudai, Malaysia
| | - S. R. Odera
- Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
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Wang X, Zhao C, Li Y, Lin Z, Xu H. A Facile and Highly Efficient Route to Amphiphilic Star‐Like Rod‐Coil Block Copolymer via a Combination of Atom Transfer Radical Polymerization with Thiol–Ene Click Chemistry. Macromol Rapid Commun 2020; 41:e1900540. [DOI: 10.1002/marc.201900540] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 01/02/2020] [Indexed: 12/21/2022]
Affiliation(s)
- Xinglong Wang
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University Nanjing 211816 China
| | - Chunyan Zhao
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University Nanjing 211816 China
| | - Yuanyuan Li
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University Nanjing 211816 China
| | - Zhiqun Lin
- School of Materials Science and EngineeringGeorgia Institute of Technology Atlanta GA 30332 USA
| | - Hui Xu
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University Nanjing 211816 China
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Abstract
In this work, surface microstructurization was coupled with shape-memory polymer to generate reversibly tunable surface properties. A photopolymerizable thiol-ene composition comprising a mixture of pentaerythritol tetrakis(3-mercaptopropionate) (PETMP), 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (TTT) and 2,2-dimethoxy-2-phenylacetophenone (DMPA) was used to prepare microstructured thiol-ene shape-memory film via casting and UV polymerization on the electron beam lithography fabricated arrays of 1 µm and 2 µm square pits. The mechanical deformation via compression and recovery of the surface microstructure were investigated. Results show that, after heat treatment of the deformed thiol-ene film, the recovery yields for microstructures were not worse than 90% ± 2% and 93% ± 2% for structures imprinted with 1 µm and 2 µm square pit micro imprint stamps. Additionally, heat treatment of deformed thiol-ene film resulted in the recovery of intense diffraction colors and laser diffraction patterns. This study opens up an avenue of incorporating microstructured shape-memory films for new products, e.g., optical security devices, superhydrophobic coatings, medical diagnostics and biosensors.
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