1
|
Abdul Razak NI, Yusoff NISM, Ahmad MH, Zulkifli M, Wahit MU. Dielectric, Mechanical, and Thermal Properties of Crosslinked Polyethylene Nanocomposite with Hybrid Nanofillers. Polymers (Basel) 2023; 15:polym15071702. [PMID: 37050316 PMCID: PMC10096733 DOI: 10.3390/polym15071702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 04/03/2023] Open
Abstract
Crosslinked polyethylene (XLPE) nanocomposite has superior insulation performance due to its excellent dielectric, mechanical, and thermal properties. The incorporation of nano-sized fillers drastically improved these properties in XLPE matrix due to the reinforcing effect of interfacial region between the XLPE–nanofillers. Good interfacial strength can be further improved by introducing a hybrid system nanofiller as a result of synergistic interaction between the nanofiller relative to a single filler system. Another factor affecting interfacial strength is the amount of hybrid nanofiller. Therefore, the incorporation amount of hybridising layered double hydroxide (LDH) with aluminium oxide (Al2O3) nanofiller into the XLPE matrix was investigated. Herein, the influence of hybrid nanofiller content and the 1:1 ratio of LDH to Al2O3 on the dielectric, mechanical, and thermal properties of the nanocomposite was studied. The structure and morphology of the XLPE/LDH-Al2O3 nanocomposites revealed that the hybridisation of nanofiller improved the dispersion state. The dielectric, mechanical, and thermal properties, including partial discharge resistance, AC breakdown strength, and tensile properties (tensile strength, Young’s modulus, and elongation at break) were enhanced since it was influenced by the synergetic effect of the LDH-Al2O3 nanofiller. These properties were increased at optimal value of 0.8 wt.% before decreasing with increasing hybrid nanofiller. It was found that the value of PD magnitude improvement went down to 47.8% and AC breakdown strength increased by 15.6% as compared to pure XLPE. The mechanical properties were enhanced by 14.4%, 31.7%, and 23% for tensile strength, Young’s modulus, and elongation at break, respectively. Of note, the hybridisation of nanofillers opens a new perspective in developing insulating material based on XLPE nanocomposite.
Collapse
|
2
|
Komorek A, Szczepaniak R, Przybyłek P, Komorek K, Komorek Z, Godzimirski J, Zbrowski A. Temperature Rise of an Adhesive Particle-Reinforced Polymer during Fatigue Testing. Polymers (Basel) 2023; 15:polym15030742. [PMID: 36772043 PMCID: PMC9920271 DOI: 10.3390/polym15030742] [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: 12/23/2022] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023] Open
Abstract
Construction adhesives are usually polymers that have been modified to achieve specific properties so that they can be used under various loading conditions. An attempt was made to estimate the effect of fatigue loading on the temperature of an adhesive material by further physically modifying the basic adhesive composition used in the research. The temperature of the materials during the tests was recorded using a thermal imaging camera and a thermoelectric thermometer. For most materials tested at 20 Hz, an increase in the number of load cycles corresponded to an increase in the temperature of the samples. For a frequency of 30 Hz, after the temperature increased by a certain value, the temperature of the modified samples recorded with the thermal imaging camera decreased. Fatigue loading caused an increase of the temperature of all tested polymeric materials. Observation of the sample during testing with a thermal imaging camera allows a simple identification of the areas with the highest temperature and can be much more useful in practice than recording temperatures with a thermocouple thermometer, as thermocouples need to be properly positioned before testing.
Collapse
Affiliation(s)
- Andrzej Komorek
- Department of Aviation, Polish Air Force University, 08-530 Dęblin, Poland
| | - Robert Szczepaniak
- Department of Aviation, Polish Air Force University, 08-530 Dęblin, Poland
| | - Paweł Przybyłek
- Department of Aviation, Polish Air Force University, 08-530 Dęblin, Poland
| | - Kacper Komorek
- Department of Aviation, Polish Air Force University, 08-530 Dęblin, Poland
| | - Zenon Komorek
- Institute of Materials Science and Engineering, Military University of Technology, 00-908 Warsaw, Poland
| | - Jan Godzimirski
- Department of Mechatronics, Armament and Aerospace, Military University of Technology, 00-908 Warsaw, Poland
| | - Andrzej Zbrowski
- Łukasiewicz Research Network—Institute for Sustainable Technologies, ul. K. Pułaskiego 6/10, 26-600 Radom, Poland
- Correspondence:
| |
Collapse
|
3
|
Novel di and tripeptide side groups bearing acrylate polymers: synthesis, characterization, and their theoretical, and electrical properties. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03388-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
|
4
|
Sena A, Soares BG. The effect of inorganic particles on the breakdown strength and mechanical properties of
EVA
‐based composites. J Appl Polym Sci 2022. [DOI: 10.1002/app.53403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Adriane Sena
- Universidade Federal do Rio de Janeiro, Instituto de Macromoléculas Centro de Tecnologia Rio de Janeiro Brazil
| | - Bluma G. Soares
- Universidade Federal do Rio de Janeiro, Instituto de Macromoléculas Centro de Tecnologia Rio de Janeiro Brazil
- Universidade Federal do Rio de Janeiro, Department of Metallurgical and Material engineering‐ COPPE, Centro de Tecnologia Rio de Janeiro Brazil
| |
Collapse
|
5
|
Goh KL, Goto A, Lu Y. LGB-Stack: Stacked Generalization with LightGBM for Highly Accurate Predictions of Polymer Bandgap. ACS OMEGA 2022; 7:29787-29793. [PMID: 36061712 PMCID: PMC9434625 DOI: 10.1021/acsomega.2c02554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 07/12/2022] [Indexed: 06/15/2023]
Abstract
Recently, the Ramprasad group reported a quantitative structure-property relationship (QSPR) model for predicting the E gap values of 4209 polymers, which yielded a test set R 2 score of 0.90 and a test set root-mean-square error (RMSE) score of 0.44 at a train/test split ratio of 80/20. In this paper, we present a new QSPR model named LGB-Stack, which performs a two-level stacked generalization using the light gradient boosting machine. At level 1, multiple weak models are trained, and at level 2, they are combined into a strong final model. Four molecular fingerprints were generated from the simplified molecular input line entry system notations of the polymers. They were trimmed using recursive feature elimination and used as the initial input features for training the weak models. The output predictions of the weak models were used as the new input features for training the final model, which completes the LGB-Stack model training process. Our results show that the best test set R 2 and the RMSE scores of LGB-Stack at the train/test split ratio of 80/20 were 0.92 and 0.41, respectively. The accuracy scores further improved to 0.94 and 0.34, respectively, when the train/test split ratio of 95/5 was used.
Collapse
|
6
|
Gao W, Li Y, Zhao J, Zhang Z, Tang W. Influence of surface modification of zinc oxide on physical properties of high density polyethylene. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
7
|
Nonlinear Surface Conductivity Characteristics of Epoxy Resin-Based Micro-Nano Structured Composites. ENERGIES 2022. [DOI: 10.3390/en15155374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Nonlinear composite materials serve to homogenize electric fields and can effectively improve the local concentration of the electric field in power systems. In order to study the nonlinear surface conductivity properties of micro-nano epoxy composites, two types of epoxy micro-nano composite specimens were prepared in the laboratory using the co-blending method. The surface conductivity of the composites was tested under different conditions using a high-voltage DC surface conductivity test system. The results show that the surface conductivity of micro-nano structured composites increases and then decreases with the rise of nanofiller doping concentration. The nonlinear coefficient was 1.781 at 4 wt% of doped nanostructured SiC, which was the most significant nonlinear coefficient compared to other doping contents. For the same doping concentration, the micro-nano structured composites doped with nanostructured SiC have more significant surface conductivity at the same test temperature with a nonlinear coefficient of 1.635. As the temperature increases, the surface conductivity of the micro-nano structured composite increases significantly, and the threshold field strength moves towards the high electric field. Along with the increase in temperature, the nonlinear coefficients of micro-nano composites after doping with nanostructured SiC showed a gradually decreasing trend. The temperature has little effect on the nonlinear coefficients of the micro-nano structured composites after doping with O-MMT.
Collapse
|
8
|
OKUTAN M, MERT H, BORAN F, ERGÜN A, DELİGÖZ H. Synthesis of a novel fluorinated graphene oxide hybrid material based on poly(2,3,4,5,6-pentafluorostyrene) and its use as a filler for thermoplastic polyurethane film. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
9
|
Iqbal MB, Khattak A, Ali A, Raza MH, Ullah N, Alahmadi AA, Khan A. Influence of Ramped Compression on the Dielectric Behavior of the High-Voltage Epoxy Composites. Polymers (Basel) 2021; 13:3150. [PMID: 34578049 PMCID: PMC8473307 DOI: 10.3390/polym13183150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/04/2021] [Accepted: 09/09/2021] [Indexed: 11/21/2022] Open
Abstract
The emergence of micro and nano-based inorganic oxide fillers with optimal filler-loadings further enhances the required insulation characteristics of neat epoxy. During manufacturing and service application, insulators and dielectrics face mechanical stresses which may alter their basic characteristics. Keeping this in mind, the facts' influence of mechanical stresses and fillers on dielectric properties of polymeric insulators of two epoxy/silica composites were fabricated and thoroughly analyzed for dielectric characteristics under ramped mechanical compressions relative to the unfilled sample. Before compression, epoxy nanocomposites exhibited responses having an average dielectric constant of 7.68 with an average dissipation factor of 0.18. After each compression, dielectric properties of all samples were analyzed. The dissipation factor and the dielectric constant trends of each sample are plotted against a suitable frequency range. It was observed that after the successive compressions up to 25 MPa, the dielectric properties of epoxy micro-silica composites were highly affected, having an average final dielectric constant of 9.65 times that of the uncompressed sample and a dissipation factor of 2.2 times that of the uncompressed sample, and these were recorded.
Collapse
Affiliation(s)
- Muhammad Bilal Iqbal
- U.S.-Pakistan Center for Advanced Studies in Energy, High Voltage Laboratory, National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan; (M.B.I.); (M.H.R.)
| | - Abraiz Khattak
- U.S.-Pakistan Center for Advanced Studies in Energy, High Voltage Laboratory, National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan; (M.B.I.); (M.H.R.)
| | - Asghar Ali
- U.S.-Pakistan Center for Advanced Studies in Energy, Department of Energy System Engineering, National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan;
| | - M. Hassan Raza
- U.S.-Pakistan Center for Advanced Studies in Energy, High Voltage Laboratory, National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan; (M.B.I.); (M.H.R.)
| | - Nasim Ullah
- Department of Electrical Engineering, College of Engineering, Taif University KSA, P.O. Box 11099, Taif 21944, Saudi Arabia; (N.U.); (A.A.A.)
| | - Ahmad Aziz Alahmadi
- Department of Electrical Engineering, College of Engineering, Taif University KSA, P.O. Box 11099, Taif 21944, Saudi Arabia; (N.U.); (A.A.A.)
| | - Adam Khan
- Department of Electronics Engineering, University of Engineering and Technology (UET) Peshawar (Abbottabad Campus), Abbottabad 22010, Pakistan;
| |
Collapse
|