Article
Chemistry, Multidisciplinary
Sibel Ugduler, Tobias De Somer, Kevin M. Van Geem, Martijn Roosen, Andreas Kulawig, Ralf Leineweber, Steven De Meester
Summary: This study provides insights into the delamination mechanism of multilayer flexible packaging film (MFPF) with carboxylic acids by using a first principles-based approach. The model developed based on Fick's first law of diffusion and first-order dissolution kinetics of polyurethane adhesives successfully estimated delamination time under different experimental conditions. The possibility of using high S/L ratios in scaling up delamination processes is highlighted.
Article
Chemistry, Physical
Song-Mi Kim, Woo-Rim Park, Oh-Heon Kwon
Summary: This study analyzed the mechanical and fracture behavior of graphene/copper composites with different Cu thicknesses, revealing that the maintenance of graphene bonds has the greatest effect on the strength of the composites. Additionally, graphene/copper composites are more vulnerable to tensile forces in specific directions depending on the Cu thickness.
Article
Polymer Science
Kaicong Cao, Wu Zhou, Lili Chen, Jiangbo He, Li Zhan, Qing Chen, Huijun Yu, Xiaoping He
Summary: This article conducts MD simulations to investigate the material properties of cross-linked epoxy resin. The predicted material properties are in great agreement with experimental data, providing guidance for designing special curing processes for different adhesive requirements.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Arnab Mukherjee, Ambroise de Izarra, Jeril Degrouard, Enrick Olive, Prabal K. Maiti, Yun Hee Jang, Yves Lansac
Summary: The process of packaging the paternal genome into tiny sperm nuclei during spermatogenesis involves a high level of DNA compaction, mainly mediated by protamine, but the exact mechanism remains unclear. Research has shown that DNA condensates formation can be reversibly controlled by adjusting the protamine-to-DNA ratio, providing valuable insights for understanding early and intermediate stages of spermatogenesis. This reversible microscopic mechanism induced by protamination modulation could also potentially improve the efficiency of recent vaccines using protamine for virus infections and cancers.
Article
Engineering, Mechanical
M. -K. Shih, Y. -H. Liu, G. -S. Lin, E. Hsu, J. Yang
Summary: Microelectronics packages play a crucial role in interconnecting and protecting electronic devices, but interfacial delamination is a common issue. This study investigates the fracture behavior at the interface between encapsulating material and copper leadframe in a quad flat no leads (QFN) package through experiments and numerical modeling, confirming the validity of the simulation model.
EXPERIMENTAL TECHNIQUES
(2023)
Article
Engineering, Environmental
Imene Berkane, Andrea Cabanes, Oksana Horodytska, Ignacio Aracil, Andres Fullana
Summary: Multilayer flexible packaging waste is a non-recyclable material, and the delamination process can increase its recyclability by separating the polymer layers. This study optimized the delamination process by microperforating the plastic. Various factors, such as temperature and thickness of the aluminum layer, were investigated and it was found that microperforation improved the delamination rate by reducing the residence time. However, the presence of inks and surfactants had no significant effect.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Chemistry, Multidisciplinary
Agne Sleiniute, Gintaras Denafas, Tamari Mumladze
Summary: This study presents an in-depth investigation of the delamination process of multilayer plastic waste recycling, aiming to examine the effects of temperature, concentration, width, and ultrasound on layer separation in multilayer packaging. The results reveal that ultrasound is the most influential factor, followed by nitric acid concentration. The study emphasizes the significance of temperature and nitric acid concentration, providing insights for future experiments and the development of more efficient methods for layer separation.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Analytical
Franz Selbmann, Soumya Deep Paul, Maulik Satwara, Frank Roscher, Maik Wiemer, Harald Kuhn, Yvonne Joseph
Summary: This paper introduces a new method of transferring structures, dies, and electronic components to a flexible substrate by lift-off. This approach combines the advantages of established semiconductor and microsystem fabrication technologies and packaging technologies with those of flexible substrates, including high precision, miniaturization, adaptability to various materials and processes, geometry adaptivity, lightweight structures, and low costs.
Article
Chemistry, Multidisciplinary
Yifan Xu, Miaogen Chen, Senjiang Yu, Hong Zhou
Summary: This study demonstrates a facile technique to prepare high-performance flexible strain sensors based on controllable wrinkles by depositing silver films on liquid PDMS substrates. The sensors show high sensitivity, wide sensing range, quick response speed, and good stability, making them promising for applications in health monitoring and motion tracking.
Article
Chemistry, Multidisciplinary
Ming Zhu, Shaobo Ji, Yifei Luo, Feilong Zhang, Zhihua Liu, Changxian Wang, Zhisheng Lv, Ying Jiang, Ming Wang, Zequn Cui, Guanglin Li, Longtao Jiang, Zhiyuan Liu, Xiaodong Chen
Summary: Researchers have developed a solderless stretchable interconnection technology using mechanically interlocking microbridges, enabling the assembly of individual stretchable devices onto soft patternable circuits to achieve multifunctional all-stretchable platforms, exhibiting excellent stretchability up to 35%.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Saman Naghibi, Sara Sangtarash, Varshini J. Kumar, Jian-Zhong Wu, Martyna M. Judd, Xiaohang Qiao, Elena Gorenskaia, Simon J. Higgins, Nicholas Cox, Richard J. Nichols, Hatef Sadeghi, Paul J. Low, Andrea Vezzoli
Summary: Integrating radical species into non-cryogenic nanodevices is crucial for molecular electronics. This study successfully fabricates single-molecule devices incorporating a persistent radical and demonstrates the retention of open-shell character at room temperature. Electrochemical gating enables reduction to a closed-shell state, and bias-dependent alignment of open-shell resonances leads to electronically driven rectification.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Xinzhi Cai, Yuqiao Liu, Tiantian Yang, Xuanzuo Dong, Xinru Zhang, Zeyi Jiang, Aihui Chou, Ting Gao, Xinxin Zhang
Summary: Incorporating hybrid fillers into polymer has been proven to be an effective way to obtain composites with high thermal conductivities. By studying the optimal ratios of different types of boron nitride nanosheets, researchers were able to achieve composites with significantly higher thermal conductivities compared to pure PTFE.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Tomoka Suzuki, Antonio De Nicola, Tomoharu Okada, Hiroyuki Matsui
Summary: Organic thin-film transistors using small-molecule semiconductor materials have been studied for flexible and printed electronic devices. The molecular structure of a mixed system of a specific semiconductor and an insulating polymer was investigated using molecular dynamics simulations. The results showed an uneven distribution of the semiconductor molecules on the surface compared to the bulk, even in low molecular weight polymer system where phase separation was not observed experimentally. The fully atomistic MD simulations provide a basis for future coarse-grained modeling.
Article
Chemistry, Multidisciplinary
Manuel Reis Carneiro, Anibal T. de Almeida, Mahmoud Tavakoli, Carmel Majidi
Summary: Researchers have developed an eco-friendly conductive ink for thin-film circuitry, which has high electrical conductivity, printability, adhesion, resilience, and recyclability. They also demonstrated stretchable biostickers for on-skin electrophysiological monitoring and a recyclable smart package with integrated sensors for monitoring safe storage of perishable foods.
Article
Engineering, Electrical & Electronic
Yuhang Yang, Linke Zhou, Omar Zayed, Maryam Alizadeh, Doris Stevanovic, Mehdi Narimani, Ali Emadi
Summary: This article proposes a methodology for analytical modeling and optimization of power modules, focusing on modules with silver-sintered molybdenum (SSM) packaging or other insulated metal substrate types of packaging schemes. The article presents a decoupled Fourier-based thermal model and a stray inductance (L-s) model, both of which show good accuracy when tested with example modules. The models are then used with the particle swarm optimization algorithm to design a half-bridge power module with SSM packaging, and the accuracy of the models is further validated through simulations and tests.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
