Article
Materials Science, Multidisciplinary
William Imamura, Erik Oda Usuda, Eder Socrates Najar Lopes, Alexandre Magnus Gomes Carvalho
Summary: Recent research has shown that natural graphite/polydimethylsiloxane rubber composites have promising barocaloric effects, making them suitable for solid-state cooling. By adding natural graphite to the rubber, the composites achieve an increase of up to 500% in thermal diffusivity and thermal conductivity, making them highly potential for solid-state cooling applications.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Composites
Ladawan Songtipya, Ponusa Songtipya, Theerarat Sengsuk, Ekwipoo Kalkornsurapranee, Yeampon Nakaramontri, Jobish Johns
Summary: A new concept of producing natural rubber based pressure-sensitive adhesive using solid particles as tack enhancer at low cost has been proposed. Different tack enhancers were investigated for their effects on the adhesion properties of the PSA, with XG, RF, and SiO2 identified as effective enhancers. The increase in adhesion properties was explained by the impact of fillers on viscoelastic properties and molecular weight of the PSA.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
He Ren, Eunice Cunha, Zheling Li, Lei Wang, Ian A. Kinloch, Dian Yi, Andrew Kretinin, Quanji Sun, Zhaodong Fan, Robert J. Young
Summary: The effect of silane-functionalized graphene nanoplatelets on the mechanical properties and thermal conductivity of reinforced silicone rubber was studied, with experimental results matching theoretical predictions.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Engineering, Manufacturing
Xingsheng Li, Yumeng Wang, Yue Hou, Chengri Yin, Zhenxing Yin
Summary: Electrically conductive rubber is a promising material in the fields of energy storage devices, electromagnetic shielding, and smart sensors, but faces challenges such as narrow variable resistance range, limited electrical conductivity, and poor mechanical properties. In this study, a novel 3-D conductive graphene nanosheet/Cu nanowire/PDMS (GCuP) composite rubber was proposed for piezoresistive pressure sensors, showing improved sensitivity, conductivity, and mechanical properties. The GCuP rubber demonstrated a decreased resistance from 5600 Omega to 32 Omega with deformation from 0% to 50%, and enhanced oxidation resistance at 120 degrees C through synergistic effects of the composite materials.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Composites
Abitha Vayyaprontavida Kaliyathan, Ajay Vasudeo Rane, Stefan Jackson, Sabu Thomas
Summary: Understanding the effect of solvents on polymers is crucial for various industrial and laboratory purposes. Swelling in rubber products, caused by easy penetration of solvent molecules due to flexible rubber chains, can be reduced by adding fillers like carbon black, which decreases chain flexibility and solvent uptake. Experimental data on diffusion through rubber vulcanisates were analyzed to predict transport phenomena.
POLYMER COMPOSITES
(2021)
Article
Physics, Applied
Ying Lin, Yuhao Liu, Kangning Wu, Liming Wang, Lijian Ding
Summary: This paper investigates the dynamic electrical conductivity of silicone rubber filled with aluminum hydroxide during crystallization. Initial crystallization leads to a reduction in conductivity, with the addition of more ATH fillers lessening the decrease; the development of subsidiary lamellae enhances conductivity, while the growth of rigid amorphous fraction decreases it again.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Shuaishuai Zhou, Shanhua Qian, Wei Wang, Zifeng Ni, Jinghu Yu
Summary: A hydrophilic and low-friction coating was successfully prepared on the surface of silicon rubber using a simple method, providing valuable insights for the surface design of similar soft materials.
Article
Physics, Fluids & Plasmas
Pedro H. A. Anjos, Francisco M. Rocha, Eduardo O. Dias
Summary: This study proposes a method of controlling the adhesion force of a fluid by applying an external electric field and demonstrates the possibility of enhancing or diminishing the bond strength by appropriately tuning the intensity and direction of the electric current. Additionally, an analytical expression for the minimum electric current required to detach the plates without external force is obtained.
Article
Engineering, Chemical
Hamid Zentou, Zurina Z. Abidin, Robiah Yunus, Dayang Radiah Awang Biak, Mohammed Abdullah Issa, Musa Yahaya Pudza
Summary: The study utilized a solution-diffusion model to investigate the pervaporation process for ethanol recovery from ethanol/water mixture, showing high accuracy and efficiency in optimizing and controlling the process. The model was validated with fermentation broth, demonstrating low mean absolute percentage errors for ethanol, water, and total flux, indicating its potential as an efficient tool for bioethanol production.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Thermodynamics
V. V. Krongauz
Summary: The kinetics of autohesion development in plasticized PVC with bis(2-diethylhexyl)phthalate were studied at different temperatures, revealing three stages of bonding: initial adhesion increase, constant adhesion plateau, and long contact time adhesion increase. The diffusion of plasticizer and polymer, as well as Van der Waals attraction between PVC macromolecules, play key roles in the adhesion process. The increase in temperature results in a decrease in the duration of the constant adhesion plateau, showing an activation energy of 113 kJ mol(-1).
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Soroosh Torabi, Zhuoyun Cai, Jonathan T. Pham, Christine A. Trinkle
Summary: Waxy hydrocarbons can diffuse freely in PDMS, allowing for the creation of inexpensive surface micro patterns that modify adhesion and wetting. The micropatterns have submicron lateral resolution and variable thickness, and can be used multiple times without re-inking.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Physics, Multidisciplinary
Ryo Iwao, Hiroki Yamaguchi, Tomohide Niimi, Yu Matsuda
Summary: The curing process of PDMS was investigated using single-molecule tracking method, showing discrepancies between time- and ensemble-averaged mean square displacements, indicating weak ergodicity breaking, as well as heterogeneous distribution of diffusion coefficient.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Biochemical Research Methods
Dennis McDuffie, Charles G. Alver, Bhumi Suthar, Madeline Helm, David Oliver, R. Alan Burgess, David Barr, Emmanuel Thomas, Ashutosh Agarwal
Summary: Microphysiological Systems (MPSs) or organs-on-chips are microfluidic devices that mimic human physiology in vitro. Polydimethylsiloxane (PDMS) is commonly used for organs-on-chips due to its established fabrication methods and biocompatibility. However, non-specific binding of small molecules restricts the use of PDMS in drug screening applications.
Article
Environmental Sciences
Alireza Fathollahi, Christina Makoundou, Stephen J. Coupe, Cesare Sangiorgi
Summary: This study quantified the total content of 16 priority EPA PAHs in end-of-life tyre derived crumb rubber granulates and various manufactured rubberised asphalt mix designs. The leaching behavior of rubberised asphalt specimens was evaluated using the Dynamic Surface Leaching Test, and a mathematical diffusion-controlled leaching model was utilized to model the release mechanisms of PAHs. The results showed that the total content of EPA PAHs in crumb rubber granulates ranged from 0.061 to 8.322 μg/g, and the total content of PAHs in rubberised asphalt specimens varied depending on the volume of crumb rubber granulates and type of binder. The leaching experiments revealed the highest leached PAHs and their cumulative release per specimen surface area.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Materials Science, Characterization & Testing
Jae Kap Jung, In Gyoo Kim, Kyu Tae Kim, Kwon Sang Ryu, Ki Soo Chung
Summary: Three techniques were developed to determine the hydrogen permeation properties of rubber samples based on volumetric and gravimetric measurements of released H-2 gas after sample decompression. By analyzing the released hydrogen over time, the charging amount and diffusivity were obtained, and the solubility and permeability of polymers were evaluated through the relations of Henry's law and P = SD. These techniques were applied to three types of sealing rubber materials, and the transport behaviors obtained in the three methods were discussed and compared along with correlations between transport parameters and carbon black filler or density.
