Article
Chemistry, Physical
Li-Mei Peng, Zhao Xu, Wei-Yu Wang, Xing Zhao, Rui-Ying Bao, Lu Bai, Kai Ke, Zheng-Ying Liu, Ming-Bo Yang, Wei Yang
Summary: The study prepared polyethylene wax vitrimer (PEWV) through the dioxaborolane exchange reaction for TIMs, which not only solved the leakage problem of polyethylene wax but also improved the thermal energy storage capacity.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Chuanchang Li, Weixuan Wang, Xiaoliang Zeng, Chunxuan Liu, Rong Sun
Summary: This study prepared a new form-stable phase change thermal interface material by melt blending paraffin wax (PW) and low-density polyethylene (LDPE), and the thermal conductivity of the material was improved by adding aluminum (Al) powder. The influence of Al powder addition on the internal structure, thermal properties, and phase change behavior of the PW/LDPE matrix was systematically studied. The results confirmed that the addition of Al powder improved the thermal conductivity of the material without a significant impact on other properties, and the thermal conductivity increased with the increase of Al addition. Therefore, morphologically stable PW/LDPE/Al is an important development direction for thermal interface materials.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Polymer Science
Patrik Sobolciak, Miroslav Mrlik, Anton Popelka, Antonin Minarik, Marketa Ilcikova, Peter Srnec, Zuzana Nogellova, Mabrouk Ouederni, Igor Krupa
Summary: Foamed phase-change materials (FPCMs) were prepared using recycled linear low-density polyethylene (LLDPE) blended with 30 wt.% of paraffin wax (PW) and foamed by 1,1 '-azobiscarbamide. The resulting foams demonstrated a stable porous structure, high porosity, and thermal conductivity, as well as stability during heating/cooling cycles. The study also confirmed the phase change capabilities and mechanical stability of the FPCMs, as well as the long-term release of paraffin wax from the samples.
Article
Chemistry, Physical
Zhaoqing Kang, Xin Li, Le Zhou, Dan Li, Jiangping Wang
Summary: Microencapsulated phase change materials (MicroPCMs) with polyethylene wax (PE-W) as nucleating agent were prepared using emulsion polymerization. The addition of PE-W significantly reduced the degree of supercooling and increased the enthalpy associated with heterogeneous nucleation in MicroPCMs. The thermal resistance of the MicroPCMs encapsulated by P(MMA-co-AMA) was greatly improved. The MicroPCMs demonstrated exceptional thermal storage and protective characteristics.
SURFACES AND INTERFACES
(2024)
Article
Thermodynamics
Shehab A. Mansour, Ahmed A. Atwa, Elsayed M. Farag, Ragab A. Elsad
Summary: This study fabricated and characterized PCM nanocomposites based on paraffin wax (PW) loaded by anatase titania (TiO2) nanoparticles (NPs). The addition of TiO2 NPs improved the thermal performance of the PCM, as evidenced by higher melting point, latent heat of fusion, and latent heat rate compared to a pure PW sample. The thermal stability of the nanocomposites varied non-monotonically with TiO2 NP concentrations, with an improvement observed up to a concentration of 0.25 mass% and rapid degradation at higher concentrations.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Construction & Building Technology
C. Gutierrez-Blandon, A. A. Cuadri, A. Tenorio-Alfonso, P. Partal, F. J. Navarro
Summary: This paper analyzes the thermomechanical properties, heat storage characteristics and compatibility of bitumen blends with a paraffin wax as phase change material. The results show partial compatibility between the blends, and the development of a multiphasic microstructure. Despite the partial compatibility, the blends exhibit a high degree of crystallinity, which makes them suitable for applications requiring thermal energy storage.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Changzhong Chen, Rong Chen, Tangyuan Zhao, Linge Wang
Summary: The influence of organic polymer supports on the properties of shape stabilized phase change materials (ssPCMs) was investigated by synthesizing linear polyurea (LP) and crosslinked polyurea (CP) to stabilize polyethylene glycol (PEG) for thermal energy storage. CP exhibited better shape stability and adsorption capacity compared to LP, however, LP showed higher heat storage efficiency in ssPCMs. Additionally, the thermal conductivity of ssPCMs could be effectively enhanced by adding carbon materials.
Article
Materials Science, Multidisciplinary
Yuntao Wu, Linying Cai, Libo Miao, Ziyang Wang, Yegang Lu
Summary: This paper investigates the influence of the interface between Si3N4 and PCMs on phase change behavior. The phase change performance and crystallization behavior of homogeneous Sb film are adjusted by changing the thickness of the Si3N4 film and the iteration period. Sb film covered by Si3N4 shows better thermal stability, data retention, and crystallization rate. The low element diffusion between Sb and Si3N4 stabilizes the nano-interface and significantly improves resistance drift.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Energy & Fuels
Svetlana N. Gorbacheva, Veronika V. Makarova, Sergey O. Ilyin
Summary: This study considered using hydrophobic nano-sized silicon dioxide as a stabilizer to obtain stable dispersions of graphite in paraffin wax, and investigated the joint influence of silica and graphite fillers on the ability of paraffin wax to accumulate and conduct heat.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
Surbhi Agarwal, Pooja Lohia, D. K. Dwivedi
Summary: This study investigated the glass transition kinetics, crystallization kinetics, and thermal stability of newly synthesized Te(1-x)(GeSe0.5)Sc-x(x = 0.05, 0.1, 0.15) glasses using differential scanning calorimetry. It was found that the incorporation of Sc enhances the crystallization rate. Additionally, the average heat of atomization and mean bond energy of the samples decrease with increasing Sc content.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Physical
Sanjay Kumar, Vineet Sharma
Summary: Thin films of (Ge2Sb2Te5)(100-x)Sm-x (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2) (Sm-GST) phase change material were studied to examine the chemical bonding, composition, morphology, thermal stability parameters, and crystallization activation energy. Results showed that Sm doping affects the thermal stability, glass-forming ability, and crystallization behavior of the thin films, potentially impacting the performance of memory devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Multidisciplinary Sciences
Mikhail Y. Shalaginov, Sensong An, Yifei Zhang, Fan Yang, Peter Su, Vladimir Liberman, Jeffrey B. Chou, Christopher M. Roberts, Myungkoo Kang, Carlos Rios, Qingyang Du, Clayton Fowler, Anuradha Agarwal, Kathleen A. Richardson, Clara Rivero-Baleine, Hualiang Zhang, Juejun Hu, Tian Gu
Summary: This study introduces an active metasurface platform with all-dielectric, low-loss architecture for phase tuning in the full 2 range and diffraction-limited performance. A new design principle enables binary switching between arbitrary phase profiles for metasurfaces, along with a figure-of-merit tailored for reconfigurable meta-optics. The high-performance varifocal metalens with a record large switching contrast ratio and aberration-free, multi-depth imaging represents a key experimental demonstration of non-mechanical tunable metalens with diffraction-limited performance.
NATURE COMMUNICATIONS
(2021)
Article
Thermodynamics
Justine Noel, Yves Jannot, Christel Metivier, Nicolo R. Sgreva
Summary: This study characterizes polyethylene glycol (PEG) in both solid and liquid phases experimentally, providing thermal properties and density information. Differential Scanning Calorimetry (DSC) is used to measure heat capacity, latent heat, and observe structural reorganizations during solidification.
THERMOCHIMICA ACTA
(2022)
Article
Thermodynamics
Imtiaz Ali Laghari, A. K. Pandey, M. Samykano, Belqasem Aljafari, K. Kadirgama, Kamal Sharma, V. V. Tyagi
Summary: Solar energy is a plentiful renewable energy source that can meet the growing demand. Thermal energy storage using phase change material (PCM) is a promising technique, but PCM's low thermal conductivity limits its use. Enhancing thermal conductivity with nanomaterials, such as graphene nanoparticles, is a solution to overcome this issue.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Energy & Fuels
Mulan Mu, Tony McNally
Summary: By incorporating MWCNTs into SSPCMs, the thermal conductivity and mechanical properties were improved, enhancing the potential applications of SSPCMs in the field of building construction.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Ahmed A. Issa, Marwa S. Elazazy, Adriaan S. Luyt
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
(2018)
Article
Polymer Science
Gurmeet S. Kanda, Ilham Al-Qaradawi, Adriaan S. Luyt
JOURNAL OF POLYMER RESEARCH
(2018)
Review
Polymer Science
Ahmed A. Issa, Adriaan S. Luyt
Article
Polymer Science
Thandi P. Gumede, Adriaan S. Luyt, Agnieszka Tercjak, Alejandro J. Mueller
Article
Polymer Science
Adriaan Stephanus Luyt, Sarah Shahid Malik, Soumia Abderrazak Gasmi, Athanasios Porfyris, Anna Andronopoulou, Dimitrios Korres, Stamatina Vouyiouka, Michael Grosshauser, Rudolf Pfaendner, Robert Bruell, Constantine Papaspyrides
Article
Multidisciplinary Sciences
Ahmed A. Issa, Marwa El-Azazy, Adriaan S. Luyt
SCIENTIFIC REPORTS
(2019)
Article
Polymer Science
Ana Antunes, Anton Popelka, Omar Aljarod, Mohammad K. Hassan, Adriaan S. Luyt
Article
Polymer Science
Ana Antunes, Anton Popelka, Omar Aljarod, Mohammad K. Hassan, Peter Kasak, Adriaan S. Luyt
Article
Polymer Science
Athanasios D. Porfyris, Stamatina N. Vouyiouka, Adriaan S. Luyt, Dimitrios M. Korres, Sarah S. Malik, Soumia Gasmi, Michael Grosshauser, Rudolf Pfaendner, Constantine D. Papaspyrides
Summary: The article focuses on the development of customized polyolefin formulations with low flammability and high weathering resistance to provide value-added polyethylene grades with extended service lifetime. The compounds achieved V0 classification in UL94V flammability tests while maintaining mechanical properties to a large extent, showing promise for outdoor applications where long-term weathering stability and flame retardance are important.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Mafereka F. T. Mosoabisane, Adriaan S. Luyt, Cornelia G. C. E. van Sittert
Summary: This article investigates the influence of molecular interaction and morphology on the thermal and mechanical properties of LLDPE/wax blends. The cooling rate is not sufficient to determine the interactions between the molecules in the blends, therefore, samples were cooled at different rates to model the thermal and mechanical properties. The results show the cocrystallization of wax with LLDPE and confirm the rapid crystallization of both components.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Polymer Science
Filip Marinkovic, Blanka Skipina, Danijela Vukovic, Ernst H. G. Langner, Adriaan S. Luyt, Dusko Dudic
Summary: This article investigates the changing dielectric properties of a LDPE/ZIF-8 composite under gamma radiation. The study found that the conductivity of the samples increased linearly with increasing radiation dose, while the change in dielectric permittivity showed nonlinear behavior.
JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS
(2022)
Article
Polymer Science
Junaid Saleem, Moghal Zubair Khalid Baig, Adriaan Stephanus Luyt, Rana Abdul Shakoor, Said Mansour, Gordon McKay
Summary: This study reports the production of reusable oil sorbent films by upcycling waste PE and PP. The sorbent films have a porous structure, good oleophilic properties, and high oil uptake capacity. Additionally, the thermal and mechanical properties of the films were also examined.
Article
Materials Science, Multidisciplinary
Junaid Saleem, Zubair Khalid Baig Moghal, Adriaan S. Luyt, R. A. Shakoor, Gordon McKay
Summary: Spin coating is commonly used to prepare thin films with uniformity and controlled thickness. However, it has not been successful in producing free-standing thin films of polyolefins due to their insufficient strength. In this study, we have achieved free-standing thin films of polyolefins, such as polyethylene, with varying thickness. These films can be used for hydrophobic coating, filtration membranes, and oil-sorbents.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Junaid Saleem, Zubair Khalid Baig Moghal, Rana A. Shakoor, Adriaan S. Luyt, Gordon McKay
Summary: Mixed polyolefin-based waste requires immediate attention to mitigate its negative impact on the environment. The separation of these plastics is energy-intensive due to their similar densities, and they cannot be blended without compatibilizers due to their inherent incompatibility. This study presents non-wettable microporous sheets made from recycled polyethylene (PE) and polypropylene (PP), which demonstrate efficient oil-water separation and high reusability. These findings emphasize the importance of sustainable solutions for plastic recycling and mitigating oil spill problems.
Article
Materials Science, Multidisciplinary
M. A. Sibeko, M. L. Saladino, F. Armetta, A. Spinella, A. S. Luyt
EMERGENT MATERIALS
(2019)
