1
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Mei S, Xu B, Wan J, Chen J. Preparation of CNT/CNF/PDMS/TPU Nanofiber-Based Conductive Films Based on Centrifugal Spinning Method for Strain Sensors. SENSORS (BASEL, SWITZERLAND) 2024; 24:4026. [PMID: 38931809 PMCID: PMC11207652 DOI: 10.3390/s24124026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 06/05/2024] [Accepted: 06/10/2024] [Indexed: 06/28/2024]
Abstract
Flexible conductive films are a key component of strain sensors, and their performance directly affects the overall quality of the sensor. However, existing flexible conductive films struggle to maintain high conductivity while simultaneously ensuring excellent flexibility, hydrophobicity, and corrosion resistance, thereby limiting their use in harsh environments. In this paper, a novel method is proposed to fabricate flexible conductive films via centrifugal spinning to generate thermoplastic polyurethane (TPU) nanofiber substrates by employing carbon nanotubes (CNTs) and carbon nanofibers (CNFs) as conductive fillers. These fillers are anchored to the nanofibers through ultrasonic dispersion and impregnation techniques and subsequently modified with polydimethylsiloxane (PDMS). This study focuses on the effect of different ratios of CNTs to CNFs on the film properties. Research demonstrated that at a 1:1 ratio of CNTs to CNFs, with TPU at a 20% concentration and PDMS solution at 2 wt%, the conductive films crafted from these blended fillers exhibited outstanding performance, characterized by electrical conductivity (31.4 S/m), elongation at break (217.5%), and tensile cycling stability (800 cycles at 20% strain). Furthermore, the nanofiber-based conductive films were tested by attaching them to various human body parts. The tests demonstrated that these films effectively respond to motion changes at the wrist, elbow joints, and chest cavity, underscoring their potential as core components in strain sensors.
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Affiliation(s)
- Shunqi Mei
- Hubei Digital Textile Equipment Key Laboratory, Wuhan Textile University, Wuhan 430073, China; (S.M.); (B.X.); (J.C.)
- The Advanced Textile Technology Innovation Center (Jianhu Laboratory), Shaoxing 312000, China
- School of Mechanical & Electrical Engineering, Xi’an Polytechnic University, Xi’an 710048, China
| | - Bin Xu
- Hubei Digital Textile Equipment Key Laboratory, Wuhan Textile University, Wuhan 430073, China; (S.M.); (B.X.); (J.C.)
| | - Jitao Wan
- Hubei Digital Textile Equipment Key Laboratory, Wuhan Textile University, Wuhan 430073, China; (S.M.); (B.X.); (J.C.)
| | - Jia Chen
- Hubei Digital Textile Equipment Key Laboratory, Wuhan Textile University, Wuhan 430073, China; (S.M.); (B.X.); (J.C.)
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2
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Berglin M, Cavanagh JP, Caous JS, Thakkar BS, Vasquez JM, Stensen W, Lyvén B, Svendsen JS, Svenson J. Flexible and Biocompatible Antifouling Polyurethane Surfaces Incorporating Tethered Antimicrobial Peptides through Click Reactions. Macromol Biosci 2024; 24:e2300425. [PMID: 38009664 DOI: 10.1002/mabi.202300425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/30/2023] [Indexed: 11/29/2023]
Abstract
Efficient, simple antibacterial materials to combat implant-associated infections are much in demand. Herein, the development of polyurethanes, both cross-linked thermoset and flexible and versatile thermoplastic, suitable for "click on demand" attachment of antibacterial compounds enabled via incorporation of an alkyne-containing diol monomer in the polymer backbone, is described. By employing different polyolic polytetrahydrofurans, isocyanates, and chain extenders, a robust and flexible material comparable to commercial thermoplastic polyurethane is prepared. A series of short synthetic antimicrobial peptides are designed, synthesized, and covalently attached in a single coupling step to generate a homogenous coating. The lead material is shown to be biocompatible and does not display any toxicity against either mouse fibroblasts or reconstructed human epidermis according to ISO and OECD guidelines. The repelling performance of the peptide-coated materials is illustrated against colonization and biofilm formation by Staphylococcus aureus and Staphylococcus epidermidis on coated plastic films and finally, on coated commercial central venous catheters employing LIVE/DEAD staining, confocal laser scanning microscopy, and bacterial counts. This study presents the successful development of a versatile and scalable polyurethane with the potential for use in the medical field to reduce the impact of bacterial biofilms.
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Affiliation(s)
- Mattias Berglin
- Department of Materials and Production, RISE Research Institutes of Sweden, Gothenburg, 413 46, Sweden
- Department of Chemistry and Molecular Biology, Gothenburg University, Gothenburg, 413 90, Sweden
| | - Jorunn Pauline Cavanagh
- Amicoat A/S, Oslo Science Park, Oslo, 1386, Norway
- Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, 9019, Norway
| | - Josefin Seth Caous
- Department of Materials and Production, RISE Research Institutes of Sweden, Gothenburg, 413 46, Sweden
| | | | - Jeddah Marie Vasquez
- Department of Materials and Production, RISE Research Institutes of Sweden, Gothenburg, 413 46, Sweden
| | - Wenche Stensen
- Department of Chemistry, UiT The Arctic University of Norway, Tromsø, 9019, Norway
| | - Benny Lyvén
- Department of Materials and Production, RISE Research Institutes of Sweden, Gothenburg, 413 46, Sweden
| | - John-Sigurd Svendsen
- Amicoat A/S, Oslo Science Park, Oslo, 1386, Norway
- Department of Chemistry, UiT The Arctic University of Norway, Tromsø, 9019, Norway
| | - Johan Svenson
- Department of Materials and Production, RISE Research Institutes of Sweden, Gothenburg, 413 46, Sweden
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3
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Szeptyński P, Pochopień JG, Jasińska D, Kwiecień A. The Influence of the Flexibility of a Polymeric Adhesive Layer on the Mechanical Response of a Composite Reinforced Concrete Slab and a Reinforced Concrete Beam Girder. Polymers (Basel) 2024; 16:444. [PMID: 38337333 DOI: 10.3390/polym16030444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 12/31/2023] [Accepted: 02/01/2024] [Indexed: 02/12/2024] Open
Abstract
This study addresses the challenges of modeling flexible connections in composite structures employing a polymeric adhesive layer. These types of connections provide a more uniform stress distribution compared to conventional rigid connectors. However, they lack standardized design rules and still require much research to sufficiently comprehend their properties. The novelty of this research lies in proposing an analytical solution to address these issues. Its aim is to investigate the influence of the stiffness of the polymer adhesive on the girder's deflection and on the maximum stresses in both the adhesive and concrete. The analyzed composite structure consists of a reinforced concrete (RC) slab and an RC beam connected with a layer of flexible polyurethane (FPU) adhesive. Analytical and numerical approaches for the description of the mechanical response of a composite bridge girder are presented. Another objective is to validate the analytical design formulas using 3D nonlinear numerical analysis, both in the case of uncracked and cracked concrete. Seven types of FPUs are tested in the uniaxial tension test, each examined at five strain rates. The obtained data is used to predict the mechanical response of the considered girder using finite element analysis (FEA) as well as with a simplified one-dimensional composite beam theory. Fair agreement is found between the FEA results and theoretical predictions. A comparison of the results obtained for these two models is performed, and the similarities and discrepancies are highlighted and discussed.
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Affiliation(s)
- Paweł Szeptyński
- Faculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, Poland
| | | | - Dorota Jasińska
- Faculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, Poland
| | - Arkadiusz Kwiecień
- Faculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, Poland
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4
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Deng S, Chen C, Li K, Chen X, Xia K, Li S. Structure-Based Multilevel Descriptors for High-throughput Screening of Elastomers. J Phys Chem B 2023; 127:10077-10087. [PMID: 37942925 DOI: 10.1021/acs.jpcb.3c06025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
To discover new materials, high-throughput screening (HTS) with machine learning (ML) requires universally available descriptors that can accurately predict the desired properties. For elastomers, experimental and simulation data in current descriptors may not be available for all candidates of interest, hindering elastomer discovery through HTS. To address this challenge, we introduce structure-based multilevel (SM) descriptors of elastomers derived solely from molecular structure that is universally available. Our SM descriptors are hierarchically organized to capture both local soft and hard segment structures as well as the global structures of elastomers. With the SM-Morgan Fingerprint (SM-MF) descriptor, one of our SM descriptors, a machine learning model accurately predicts elastomer toughness with a remarkable accuracy of 0.91. Furthermore, an HTS pipeline is established to swiftly screen elastomers with targeted toughness. We also demonstrate the generality and applicability of SM descriptors by using them to construct HTS pipelines for screening elastomers with a targeted critical strain or Young's modulus. The user-friendliness and low computational cost of SM descriptors make them a promising tool to significantly enhance HTS in the search for novel materials.
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Affiliation(s)
- Siyan Deng
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Chao Chen
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Ke Li
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Republic of Singapore
| | - Xi Chen
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Kelin Xia
- School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Shuzhou Li
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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5
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Melinte V, Culica ME, Chibac-Scutaru AL. Cellulose acetate/polyurethane blend as support matrix with high optical transparency and improved mechanical properties for photocatalyst CeO 2 nanoparticles immobilization. Int J Biol Macromol 2023; 251:126210. [PMID: 37579894 DOI: 10.1016/j.ijbiomac.2023.126210] [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: 03/29/2023] [Revised: 07/03/2023] [Accepted: 08/05/2023] [Indexed: 08/16/2023]
Abstract
Advanced manufacturing technologies for efficient catalytic materials have triggered the rational design of catalysts as well as extensive investigation into preparative methodologies. Herein, we report the preparation of new versatile cellulose acetate/polyurethane (CA/PU) blends for efficient immobilization of CeO2 nanoparticles, the appropriate composition of polymer mixture being chosen after rigorous analysis (SEM, FTIR, optical, mechanical). The band gap energy for hybrid films ranged between 3.02 eV and 2.05 eV, the lowest value being measured for the film with Co-doped CeO2 NPs (B3 film). The best results in photodegradation of methylene blue under visible-light irradiation was attained after 50 min for B3 film (rate constant k = 45.34× 10-3 min-1), while the total mineralization of MB in the same conditions as evaluated by HPLC-ESI MS and TOC analyses was achieved after 90 min. Effect of co-ions (SO42-, Cl- or NO3-) on photocatalytic performance was studied, and scavenger tests were used to identify the active species involved in the photocatalytic mechanism. Also, the photocatalytic efficiency of B3 sample was tested for rhodamine B, metronidazole and 4-nitrophenol degradation. Evaluation of the stability and integrity of hybrid film after 5 catalysis cycles reveal that the photocatalytic potential is retained with no substantial structural changes.
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Affiliation(s)
- Violeta Melinte
- Polyaddition and Photochemistry Department, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487, Iasi, Romania.
| | - Madalina Elena Culica
- Polyaddition and Photochemistry Department, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487, Iasi, Romania
| | - Andreea Laura Chibac-Scutaru
- Polyaddition and Photochemistry Department, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487, Iasi, Romania.
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6
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Zielonka P, Junik K, Duda S, Socha T, Kula K, Denisiewicz A, Olaleye K, Macek W, Lesiuk G, Błażejewski W. Stress Relaxation Behaviour Modeling in Rigid Polyurethane (PU) Elastomeric Materials. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3156. [PMID: 37109992 PMCID: PMC10146703 DOI: 10.3390/ma16083156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 06/19/2023]
Abstract
Polyurethane (PU) has been used in a variety of industries during the past few years due to its exceptional qualities, including strong mechanical strength, good abrasion resistance, toughness, low-temperature flexibility, etc. More specifically, PU is easily "tailored" to satisfy particular requirements. There is a lot of potential for its use in broader applications due to this structure-property link. Ordinary polyurethane items cannot satisfy people's increased demands for comfort, quality, and novelty as living standards rise. The development of functional polyurethane has recently received tremendous commercial and academic attention as a result. In this study, the rheological behavior of a polyurethane elastomer of the PUR (rigid polyurethane) type was examined. The study's specific goal was to examine stress relaxation for various bands of specified strains. We also suggested the use of a modified Kelvin-Voigt model to describe the stress relaxation process from the perspective of the author. For the purpose of verification, materials with two different Shore hardness ratings-80 and 90 ShA, respectively-were chosen. The outcomes made it possible to positively validate the suggested description in a variety of deformations ranging from 50% to 100%.
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Affiliation(s)
- Paweł Zielonka
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland
| | - Krzysztof Junik
- Strongflex.eu Company, Zakrzowska 21, 51-318 Wrocław, Poland
| | - Szymon Duda
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland
| | - Tomasz Socha
- Faculty of Civil Engineering, Architecture and Environmental Engineering, University of Zielona Góra, ul. Prof. Z. Szafrana 1, 65-516 Zielona Góra, Poland
| | - Krzysztof Kula
- Faculty of Civil Engineering, Architecture and Environmental Engineering, University of Zielona Góra, ul. Prof. Z. Szafrana 1, 65-516 Zielona Góra, Poland
| | - Arkadiusz Denisiewicz
- Faculty of Civil Engineering, Architecture and Environmental Engineering, University of Zielona Góra, ul. Prof. Z. Szafrana 1, 65-516 Zielona Góra, Poland
| | - Kayode Olaleye
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland
| | - Wojciech Macek
- Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdańsk, Poland
| | - Grzegorz Lesiuk
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland
| | - Wojciech Błażejewski
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland
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7
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Cen L, Du B, Lv G. Improved covulcanization and dynamic properties of millable polyurethane elastomer/natural rubber blends: Thermal pretreatment. J Appl Polym Sci 2023. [DOI: 10.1002/app.53725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Lan Cen
- School of Materials and Energy Guangdong University of Technology Guangzhou China
| | - Binghua Du
- School of Materials and Energy Guangdong University of Technology Guangzhou China
| | - Guozheng Lv
- School of Materials and Energy Guangdong University of Technology Guangzhou China
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8
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Gorbunova MA, Anokhin DV, Abukaev AF, Ivanov DA. The Influence of Long-Time Storage on the Structure and Properties of Multi-Block Thermoplastic Polyurethanes Based on Poly(butylene adipate) Diol and Polycaprolactone Diol. MATERIALS (BASEL, SWITZERLAND) 2023; 16:818. [PMID: 36676555 PMCID: PMC9865919 DOI: 10.3390/ma16020818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/11/2023] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
A series of semi-crystalline multi-block thermoplastic polyurethanes (TPU), containing poly(butylene adipate) (PBA), polycaprolactone (PCL) and their equimolar mixture (PBA/PCL) as a soft segment was synthesized. The changes in the physical-mechanical and thermal properties of the materials observed in the course of a 36-month storage at room temperature were related to the corresponding structural evolution. The latter was monitored using Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXS) and mechanical tests (tensile strength test). The effects of the composition of the soft segment on the phase separation and crystallization of the soft segment were analyzed in detail. It was found that the melting temperature of the crystalline phase increases with storage time, which is associated with hindering of the phase separation of the hard and soft segments of the TPU samples as it was detected by FTIR.
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9
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Recent Progress of Non-Isocyanate Polyurethane Foam and Their Challenges. Polymers (Basel) 2023; 15:polym15020254. [PMID: 36679134 PMCID: PMC9866265 DOI: 10.3390/polym15020254] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 12/28/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023] Open
Abstract
Polyurethane foams (PUFs) are a significant group of polymeric foam materials. Thanks to their outstanding mechanical, chemical, and physical properties, they are implemented successfully in a wide range of applications. Conventionally, PUFs are obtained in polyaddition reactions between polyols, diisoycyanate, and water to get a CO2 foaming agent. The toxicity of isocyanate has attracted considerable attention from both scientists and industry professionals to explore cleaner synthesis routes for polyurethanes excluding the use of isocyanate. The polyaddition of cyclic carbonates (CCs) and polyfunctional amines in the presence of an external blowing agent or by self-blowing appears to be the most promising route to substitute the conventional PUFs process and to produce isocyanate-free polyurethane foams (NIPUFs). Especially for polyhydroxyurethane foams (PHUFs), the use of a blowing agent is essential to regenerate the gas responsible for the creation of the cells that are the basis of the foam. In this review, we report on the use of different blowing agents, such as Poly(methylhydrogensiloxane) (PHMS) and liquid fluorohydrocarbons for the preparation of NIPUFs. Furthermore, the preparation of NIPUFs using the self-blowing technique to produce gas without external blowing agents is assessed. Finally, various biologically derived NIPUFs are presented, including self-blown NIPUFs and NIPUFs with an external blowing agent.
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10
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Lee Y, Lee W, Chen Y. Studies on the reactivity of epoxy/polyol/isocyanate blend resins and the properties of epoxy/polyurethane composites. J Appl Polym Sci 2022. [DOI: 10.1002/app.53339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ya‐Shiuan Lee
- Department of Forestry National Chung‐Hsing University Taichung City Taiwan
| | - Wen‐Jau Lee
- Department of Forestry National Chung‐Hsing University Taichung City Taiwan
| | - Yi‐Chun Chen
- Department of Forestry National Chung‐Hsing University Taichung City Taiwan
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11
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Guo Y, Luo W, Zhang J, Hu W. Dynamic Monte Carlo simulations of strain-induced crystallization in multiblock copolymers: Effects of microphase separation. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Curing Kinetics of Methylene Diphenyl Diisocyanate-Based Polyurethane Elastomers. Polymers (Basel) 2022; 14:polym14173525. [PMID: 36080600 PMCID: PMC9459966 DOI: 10.3390/polym14173525] [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: 07/31/2022] [Revised: 08/24/2022] [Accepted: 08/25/2022] [Indexed: 11/17/2022] Open
Abstract
The curing kinetics of MDI-based polyurethane elastomers were studied by non-isothermal differential scanning calorimetry (DSC). The kinetic parameters of the reaction system were calculated by the Kissinger method. The changing activation energy was observed by the Flynn−Wall−Ozawa method and the Friedman method. The results of model free fitting showed that the curing reaction could be divided into two stages, showing a change in reaction order when α > 0.45 and a piecewise curing mechanism function of the MDI-based polyurethane elastomers reaction system was deduced by autocatalytic model. The extrapolation method was used to determine the optimum curing conditions for the system, which can accurately describe the curing process. In addition, the optimal curing conditions are when: the constant temperature curing temperature of the system is 81 °C, the curing time is 29 min, and the post-curing temperature is 203 °C.
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13
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Xu C, Ding S, Liu X, Wang F, Shi Y, Wang X, Wang Z. Superhigh strength polyurethane materials with oriented microdomains produced through mechanical deformation. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Synthesis and Study of Physical and Mechanical Properties of Urethane-Containing Elastomers Based on Epoxyurethane Oligomers with Controlled Crystallinity. Polymers (Basel) 2022; 14:polym14112136. [PMID: 35683810 PMCID: PMC9182979 DOI: 10.3390/polym14112136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 02/06/2023] Open
Abstract
The influence of the molecular weight of oligoamine, oligoether, and the type of diisocyanate on the physical and mechanical properties of elastomers with urethane hydroxyl hard segments was studied. For this purpose, oligoetherdiamines with molecular weights ~1008 and ~1400 g mol−1 were synthesized by a three-stage method. Epoxyurethane oligomers were synthesized according to a two-step route with an oligodiisocyanate as an intermediate product. A series of 12 elastomers with controlled crystallinity were synthesized from these elastomers and amines. The deformation and strength properties of the elastomers were studied.
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15
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Potolinca VO, Oprea S. An insight on the effect of the hard segment domain on the thermo‐mechanical and surface properties of new piperazine‐based polyurethanes. J Appl Polym Sci 2022. [DOI: 10.1002/app.52467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Violeta Otilia Potolinca
- Department of Polyaddition and Photochemistry “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Stefan Oprea
- Department of Polyaddition and Photochemistry “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
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16
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Rahmatkhah S, Mehdipour-Ataei S. Synthesis and characterization of novel poly(urethane-amide)s with enhanced thermal stability. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2021. [DOI: 10.1080/1023666x.2021.2012042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Sepideh Rahmatkhah
- Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran
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17
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Investigation of hygrothermal aging on the polyurethane-based (PUB) adhesive: substantiating competition scenario between sub-aging thermo-oxidation and hydrolytic phenomena. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02718-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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18
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Behavior to UV irradiation of the polyurethanes containing azobenzene side groups in the main chains structure. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02708-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Ohzono T, Minamikawa H, Koyama E, Norikane Y. Impact of Crystallites in Nematic Elastomers on Dynamic Mechanical Properties and Adhesion. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01160] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takuya Ohzono
- Research Institute for Advanced Electronics and Photonics, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Hiroyuki Minamikawa
- Interdisciplinary Research Center for Catalytic Chemistry, AIST, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Emiko Koyama
- Research Institute for Advanced Electronics and Photonics, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Yasuo Norikane
- Research Institute for Advanced Electronics and Photonics, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8565, Japan
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20
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Oguz O, Candau N, Stoclet G, Simsek E, Kosak Soz C, Yilgor E, Yilgor I, Menceloglu YZ. Geometric Confinement Controls Stiffness, Strength, Extensibility, and Toughness in Poly(urethane–urea) Copolymers. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oguzhan Oguz
- Faculty of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, 34956 Orhanli, Tuzla, Istanbul, Turkey
- Integrated Manufacturing Technologies Research and Application Center & Composite Technologies Center of Excellence, Sabanci University, Teknopark Istanbul, 34906 Pendik, Istanbul, Turkey
| | - Nicolas Candau
- Centre Català del Plàstic (CCP), Universitat Politècnica de Catalunya Barcelona Tech (EEBE-UPC), Av. D’Eduard Maristany, 16, Barcelona 08019, Spain
| | - Gregory Stoclet
- CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, Univ. Lille, F-59000 Lille, France
| | - Eren Simsek
- Faculty of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, 34956 Orhanli, Tuzla, Istanbul, Turkey
| | - Cagla Kosak Soz
- KUYTAM Surface Science and Technology Center, Chemistry Department, Koc University, 34450 Sariyer, Istanbul, Turkey
| | - Emel Yilgor
- KUYTAM Surface Science and Technology Center, Chemistry Department, Koc University, 34450 Sariyer, Istanbul, Turkey
| | - Iskender Yilgor
- KUYTAM Surface Science and Technology Center, Chemistry Department, Koc University, 34450 Sariyer, Istanbul, Turkey
| | - Yusuf Z. Menceloglu
- Faculty of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, 34956 Orhanli, Tuzla, Istanbul, Turkey
- Integrated Manufacturing Technologies Research and Application Center & Composite Technologies Center of Excellence, Sabanci University, Teknopark Istanbul, 34906 Pendik, Istanbul, Turkey
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21
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Bronzeri LB, Gauche C, Gudimard L, Courtial EJ, Marquette C, Felisberti MI. Amphiphilic and segmented polyurethanes based on poly(ε-caprolactone)diol and poly(2-ethyl-2-oxazoline)diol: Synthesis, properties, and a preliminary performance study of the 3D printing. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110449] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Stroea L, Chibac-Scutaru AL, Melinte V. Aliphatic Polyurethane Elastomers Quaternized with Silane-Functionalized TiO 2 Nanoparticles with UV-Shielding Features. Polymers (Basel) 2021; 13:1318. [PMID: 33923812 PMCID: PMC8074198 DOI: 10.3390/polym13081318] [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: 03/24/2021] [Revised: 04/12/2021] [Accepted: 04/15/2021] [Indexed: 11/17/2022] Open
Abstract
The design of high-performance nanocomposites with improved mechanical, thermal or optical properties compared to starting polymers has generated special interest due to their use in a wide range of targeted applications. In the present work, polymer nanocomposites composed of polyurethane elastomers based on polycaprolactone or polycaprolactone/poly(ethylene glycol) soft segments and titanium dioxide (TiO2) nanoparticles as an inorganic filler were prepared and characterized. Initially, the surface of TiO2 nanoparticles was modified with (3-iodopropyl) trimethoxysilane as a coupling agent, and thereafter, the tertiary amine groups from polyurethane hard segments were quaternized with the silane-modified TiO2 nanoparticles in order to ensure covalent binding of the nanoparticles on the polymeric chains. In the preparation of polymer nanocomposites, two quaternization degrees were taken into account (1/1 and 1/0.5 molar ratios), and the resulting nanocomposite coatings were characterized by various methods (Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, contact angle, thermogravimetric analysis, dynamic mechanical thermal analysis). The mechanical parameters of the samples evaluated by tensile testing confirm the elastomeric character of the polyurethanes and of the corresponding composites, indicating the obtaining of highly flexible materials. The absorbance/transmittance measurements of PU/TiO2 thin films in the wavelength range of 200-700 nm show that these partially block UV-A radiation and all UV-B radiation from sunlight and could possibly be used as UV-protective elastomeric coatings.
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Affiliation(s)
| | | | - Violeta Melinte
- Polyaddition and Photochemistry Department, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (L.S.); (A.-L.C.-S.)
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Jing T, Heng X, Guifeng X, Ling C, Pingyun L, Xiaode G. Highly stretchable, high efficiency room temperature self-healing polyurethane adhesive based on hydrogen bonds – applicable to solid rocket propellants. Polym Chem 2021. [DOI: 10.1039/d1py00439e] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The introduction of weak hydrogen bonds based on the isophorone structure enables the polymer to have high stretchability and self-healing ability at room temperature to heal propellant damage.
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Affiliation(s)
- Tu Jing
- National Special Superfine Powder Engineering Research Center of China
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
| | - Xu Heng
- National Special Superfine Powder Engineering Research Center of China
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
| | - Xiang Guifeng
- National Special Superfine Powder Engineering Research Center of China
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
| | - Chen Ling
- National Special Superfine Powder Engineering Research Center of China
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
| | - Li Pingyun
- National Special Superfine Powder Engineering Research Center of China
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
| | - Guo Xiaode
- National Special Superfine Powder Engineering Research Center of China
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
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24
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Fiorio R, Danda C, Maia J. Influence of trisilanol isooctyl POSS content on the structure, morphology and rheological properties of thermoplastic polyurethane (TPU). JOURNAL OF POLYMER ENGINEERING 2020. [DOI: 10.1515/polyeng-2020-0154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIn this study, thermoplastic polyurethanes (TPUs) containing trisilanol isooctyl polyhedral oligomeric silsesquioxane (POSS), a reactive nanofiller, were synthesized and characterized rheologically and morphologically, and the effects of POSS content on the melt thermal stability of the TPUs are investigated. Samples containing 0, 0.23, 0.57, 1.14, and 2.23% (w/w) POSS were synthesized by reactive extrusion and characterized by Fourier transform infrared spectroscopy (FTIR), oscillatory and extensional rheometry, atomic force microscopy (AFM), and small- and wide-angle X-ray scattering (SAXS and WAXS, respectively). The rheological properties of molten TPU are time-dependent and the melt thermal stability of the TPU is maximal at 1.14% of POSS. The addition of 0.23 and 0.57% POSS promotes strain-hardening at low extensional strain rates (0.01 and 0.10 s−1), not affecting the extensional characteristics at higher strain rates. The addition of increasing amounts of POSS leads to the formation of POSS-rich clusters well dispersed in the TPU matrix. SAXS and WAXS results show that the POSS domains are amorphous and that POSS does not modify the crystalline structure of TPU. Therefore, this work indicates that synthesizing TPU in the presence of trisilanol isooctyl POSS can increase the melt thermal stability of the polymer, facilitating its processing.
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Affiliation(s)
- Rudinei Fiorio
- Instituto Federal de EducaçãoCiência e Tecnologia do Rio Grande do Sul, Avelino Antônio de Souza, 1730 Nossa Sra. de Fátima, Caxias do Sul, Rio Grande do Sul, 95043-700, Brazil
| | - Chaitanya Danda
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Rd., Cleveland, Ohio, 44106-7202, USA
| | - João Maia
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Rd., Cleveland, Ohio, 44106-7202, USA
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Tian S. Recent Advances in Functional Polyurethane and Its Application in Leather Manufacture: A Review. Polymers (Basel) 2020; 12:E1996. [PMID: 32887324 PMCID: PMC7565108 DOI: 10.3390/polym12091996] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 08/23/2020] [Accepted: 08/29/2020] [Indexed: 11/30/2022] Open
Abstract
Over last few years, polyurethane (PU) has been applied in a number of areas because of its remarkable features, such as excellent mechanical strength, good abrasion resistance, toughness, low temperature flexibility, etc. More specifically, PU can be easily "tailor made" to meet specific demands. This structure-property relationship endows great potential for use in wider applications. With the improvement of living standards, ordinary polyurethane products cannot meet people's growing needs for comfort, quality, and novelty. This has recently drawn enormous commercial and academic attention to the development of functional polyurethane. Among the major applications, PU is one of the prominent retanning agents and coating materials in leather manufacturing. This review gives a summary of academic study in the field of functional PU as well as its recent application in leather manufacture.
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Affiliation(s)
- Saiqi Tian
- College of Education, Wenzhou University, Wenzhou 325035, China
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