Article
Materials Science, Multidisciplinary
Yukun Chen, Jinfeng Tian, Wenxin Fu, Yuan Wang, Yilin Zhou, Shuang Xia, Huawei Zou, Mei Liang
Summary: We synthesized four well-designed polysiloxane elastomers with different macromolecular structures and investigated the impact of chemical structure on the macroadhesion performance of microfibrillar adhesives. The study confirmed that the chemical structure is the major factor influencing the adhesion properties of the microfibrillar adhesives. The adhesive properties varied significantly among the four adhesives, highlighting the importance of chemical structure in determining adhesion performance. The observed differences were attributed to variations in surface free energy and molecular interactions resulting from the designed macromolecular structures.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Mechanics
Mazharul Islam Lincon, Hui-Yun Hwang
Summary: The adhesion strength of shape-memory fibers (SMFs) embedded in adhesives can be enhanced by adjusting the pre-strain of SMFs and temperature. The degradation of the adhesive's properties and the phase transformation of SMFs are the most influential factors affecting the interfacial shear strength (IFSS).
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Ji Soo Lee, Minkook Kim, Min Wook Lee
Summary: Carbon fiber-reinforced polymer composites are commonly used for lightweight and high-strength applications. A new adhesive film with controllable adhesive strength was studied, which enables the selective delamination of carbon fiber layers without damaging the fiber or matrix materials.
COMPOSITE STRUCTURES
(2022)
Article
Energy & Fuels
Bingzheng Wang, Xiaoli Yu, Hongming Xu, Qian Wu, Lei Wang, Rui Huang, Zhi Li, Quan Zhou
Summary: This paper proposes a new concept of 'Vehicle-to-Micro-Grid (V2 mu G) network' and investigates its impact on energy efficiency and environmental impacts through rule-based energy management strategy, scenario analysis, and NSGA-II algorithm. The study suggests that V2 mu G network can reduce the battery degradation in BEV and carbon dioxide emissions.
Article
Green & Sustainable Science & Technology
A. Cieplinski, S. D'Alessandro, F. Marghella
Summary: The study suggests that the combination of liberalized markets with low marginal cost and intermittent technologies weakens the impact of price incentive policies on new investments in wind and solar energy, resulting in a slower expansion of renewable energy. The importance of achieving a high penetration rate of variable renewable energy sources in the future is highlighted despite the ineffectiveness of price subsidy policies in the short term.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Chemistry, Physical
Pan Gao, Wei Pu, Pengchong Wei, Miqiu Kong
Summary: Research investigates the adhesion at nanoscale of PDMS-silica interface by establishing a molecular model. The results show that PDMS with 30 repeat units has the highest adhesion energy, but temperature has the greatest proportional change in adhesion energy. Increasing temperature within a certain range benefits adhesion energy improvement, along with the molecular weight or polarity of PDMS terminal group.
APPLIED SURFACE SCIENCE
(2022)
Article
Thermodynamics
Ville Olkkonen, Janne Hirvonen, Juhani Heljo, Sanna Syri
Summary: This paper studies the effectiveness of energy efficiency measures in the building sector in alternative long-term energy system scenarios until 2050 with varying CO2 reduction targets. The study shows that the initial carbon intensity of the energy mix significantly affects the achievable CO2 emission reductions of demand-side measures.
Article
Construction & Building Technology
Emanuela Speranzini, Stefano Agnetti, Elisa Tomassini
Summary: FRCMs are a type of structural reinforcement that use a fibre mesh or fabric embedded in a cement-based or lime-based matrix to reinforce concrete and masonry structures. This study conducted traction-shear tests to evaluate the fracture behavior of the reinforcement at different bonded lengths, and developed a theoretical adhesion law based on the experimental results.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Mingyue Lu, Li Ding, Tianci Zhong, Zhendong Dai
Summary: In this paper, a carbon dioxide (CO2) plasma-assisted method was developed for preparing dopamine coating polydimethylsiloxane (PDMS). The PDMS films were treated with CO2 plasma and dopamine, resulting in the introduction of polar groups and the formation of poly(dopamine) coating. The modified samples showed improved hydrophilicity and shearing adhesion, making them suitable for medical and adhesive applications.
Article
Green & Sustainable Science & Technology
Natanael Bolson, Maxim Yutkin, Tadeusz Patzek
Summary: Electrification has the potential to reduce primary power consumption and transition to a more sustainable energy system, with savings depending on the sources of electricity used. However, intense heat processes are highly sensitive to electrification, with significant losses in primary power.
Article
Thermodynamics
Yee Van Fan, Peng Jiang, Jiri Jaromir Klemes, Pawel Oclon
Summary: The electrification of mobility is an effective solution to reduce the environmental burden of the transportation sector. This study assesses the environmental performance of power generation and identifies the potential emission reduction by altering the charging behavior of electric vehicles. The results show that charging at specific times and locations can significantly lower greenhouse gas emissions, and changing charging behavior can lead to a lower greenhouse gas footprint.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Muhammad Shahzad Javed, Tao Ma, Jakub Jurasz, Jerzy Mikulik
Summary: The study proposes an integrated framework for selecting suitable configurations for renewable energy systems, highlighting the significant impact of preference selection on results and the conflicting nature of technical and economic criteria.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Multidisciplinary Sciences
Kaile Zhou, Jingna Yang, Hui Yin, Tao Ding
Summary: In order to achieve its goals of carbon emissions peak and neutrality, China requires collaboration across all sectors. This study explores different scenarios to determine the pathways for emissions reduction and the timing of decoupling economic growth from CO2. The results indicate that China's carbon emissions will peak between 2025 and 2030, with the agriculture, forestry, livestock, and fishing sectors being the first to reach peak emissions. All sectors, except for electricity, gas, and water production and supply, are projected to achieve carbon peak by 2030.
Article
Mechanics
Guibing Li, Aihui Zhang, Weiliang Jin, Yifei Xiao, Huaying Li
Summary: According to the ACI440.2R and other codes，concrete can achieve a compressive strain of 0.003 without FRP debonding at the ultimate limit state of FRP-strengthened RC beams. However, many flexural tests have shown that intermediate crack (IC) induced debonding is the main failure mode, and the ultimate compressive strain of the concrete cannot reach 0.003, in most cases, even much less than 0.003 at initial debonding of CFRP reinforcements. In addition, the FRP debonding strain limit proposed by the codes cannot effectively prevent debonding failure. A new model is developed based on theoretical analysis and test results to calculate CFRP strain and flexural strength. Six CFRP-strengthened RC beams are tested to investigate the initiation of CFRP debonding and provide clear pictures of the tensile strains, load-carrying capacity, concrete compressive strain, and cracks at the initial debonding. The new model provides a more accurate evaluation of the CFRP strain and flexural strength in beams with IC debonding failure compared to code models.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Shuang-Xi Hou, Jie Zhang, Gang Wu, Si-Chong Chen, Yu-Zhong Wang
Summary: A removable, green adhesive based on graft copolymers of aliphatic polyesters has been developed, which has strong adhesion to various substrate surfaces. It can be debonded under mild conditions to achieve intact recovery of the adherends. The residue of debonded adhesive could be depolymerized to corresponding monomers with high purity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Polymer Science
Valentine Hervio, Bruno Bresson, Annie Brulet, Ingrid J. Paredes, Ayaskanta Sahu, Valerie Briand, Costantino Creton, Gabriel E. Sanoja
Summary: NBR can be mechanically rejuvenated and physically aged due to the inhomogeneous distribution of monomers, resulting in a weakly microphase-separated nanostructure when extruded at high temperature and shear, and lamellar nanodomains when physically aged, affecting the rheological properties and processing conditions.
Article
Materials Science, Characterization & Testing
Giorgia Scetta, Nathan Selles, Patrick Heuillet, Matteo Ciccotti, Costantino Creton
Summary: The study shows that the stress-stretch curve of TPUs changes with the number of applied cycles when cyclically loaded up to the same value of maximum stretch, but eventually reaches a steady state. A suitable methodology based on fracture mechanics approach is proposed to evaluate the cyclic fatigue resistance in TPUs, with additional treatments to account for the higher tendency to creep of TPUs compared to thermoset rubbers. Comparing the results with classical filled rubbers, TPUs demonstrate excellent toughness and cyclic fatigue resistance, suggesting new opportunities for applications requiring resistance to crack propagation under cyclic loading at large strains.
Article
Multidisciplinary Sciences
Xueyu Li, Kunpeng Cui, Takayuki Kurokawa, Ya Nan Ye, Tao Lin Sun, Chengtao Yu, Costantino Creton, Jian Ping Gong
Summary: In this study, the fatigue resistance of chemically cross-linked polyampholyte hydrogels with a hierarchical structure was investigated. It was found that the structure details characterized by SAXS control the mechanisms of crack propagation, with gels exhibiting strong phase contrast and low cross-linking levels showing higher fatigue resistance. The mesoscale structure plays a detailed role in providing design principles for developing self-healing, tough, and fatigue-resistant soft materials.
Article
Multidisciplinary Sciences
Gabriel E. Sanoja, Xavier P. Morelle, Jean Comtet, C. Joshua Yeh, Matteo Ciccotti, Costantino Creton
Summary: In this study, soft and tough double-network elastomers were tagged with mechanofluorescent probes to quantify damage after crack propagation. It was found that reversible elasticity and strain hardening dictate fatigue resistance, while energy dissipation at high strains controls toughness. These findings provide valuable insights for engineering fatigue-resistant elastomers and reducing the environmental impact of the polymer industry.
Article
Polymer Science
Burebi Yiming, Zhaoxin Zhang, Yuchen Lu, Xingang Liu, Costantino Creton, Shuze Zhu, Zheng Jia, Shaoxing Qu
Summary: This study found that air-aged Ionic conductive elastomers (ICEs) absorb a very low amount of water in the environment, which endows them with stable mechanical performance and significantly enhanced conductivity. The underlying molecular mechanism of water molecules and lithium ions is clarified and provides guidance for the practical application of ICE-based soft ionotronics in ambient environments.
Article
Multidisciplinary Sciences
Juliette Slootman, C. Joshua Yeh, Pierre Millereau, Jean Comtet, Costantino Creton
Summary: A molecular design utilizing multiple interpenetrating networks and prestretched brittle filler network can significantly increase the fracture energy of an elastomer. Increasing the prestretch of the filler network results in a larger fracture energy, especially at high temperatures where viscoelasticity is inactive. The increase in fracture energy is mainly attributed to the dilution of highly stretched strands in the matrix, which effectively protects the material from damage and crack growth.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Polymer Science
Aaliyah Z. Dookhith, Nathaniel A. Lynd, Costantino Creton, Gabriel E. Sanoja
Summary: This study investigates the relationship between reaction pathway, network architecture, and mechanical properties in poly(ethyl glycidyl ether) networks synthesized by epoxide ring-opening polymerization with two organoaluminum catalysts. The key finding is that controlled polymerizations lead to highly cross-linked, stiff, and brittle networks.
Article
Mechanics
Jingwen Zhao, Louis Debertrand, Tetsuharu Narita, Costantino Creton
Summary: This study investigates the fracture properties of poly(acrylamide-co-1-vinylimidazole) dual crosslink hydrogels containing a small fraction of covalent bonds and a majority of dynamic metal coordination bonds. The presence of faster dynamic coordination bonds significantly toughens the gels even at high stretch rates, and two additional molecular mechanisms are proposed to rationalize this behavior, including the sharing of load upon covalent bond scission and the existence of longer-lived clusters of dynamic bonds.
JOURNAL OF RHEOLOGY
(2022)
Article
Mechanics
Jianzhu Ju, Luca Cipelletti, Stephan Zoellner, Tetsuharu Narita, Costantino Creton
Summary: Multiple speckle diffusing wave spectroscopy (MSDWS) is utilized to measure spatially heterogeneous mechanical behavior in soft solids. The study discusses the mathematical approach for quantifying deformation rate from MSDWS data and provides guidelines for optimizing experimental parameters. The potential of MSDWS is demonstrated by measuring the spatial distribution of deformation rate during shear debonding of adhesive tapes.
JOURNAL OF RHEOLOGY
(2022)
Review
Polymer Science
Mehdi Vahdati, Dominique Hourdet, Costantino Creton
Summary: This review summarizes the recent developments in soft underwater adhesives based on weak molecular interactions. The composition, structure, and adhesive properties of these materials are critically discussed, and guidelines for designing future soft underwater adhesives are provided.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Physics, Fluids & Plasmas
Jianzhu Ju, Ken Sekimoto, Luca Cipelletti, Costantino Creton, Tetsuharu Narita
Summary: Surface creasing in gels under compression is a common occurrence. Previous studies have focused on the equilibrium behavior of creased gels, while the transient behavior in swelling gels is often far from equilibrium and heterogeneous. This study uses high-speed imaging techniques to investigate the time-dependent behavior of gels after exposure to external stimuli.
Article
Chemistry, Physical
Xavier P. Morelle, Gabriel E. Sanoja, Sylvie Castagnet, Costantino Creton
Summary: High-pressure gas-saturated elastomers experience cavity nucleation, inflation, and deflation during rapid decompression, causing internal damage. Fluorescently tagged model elastomers reveal 3D crack damage, aiding in understanding and predicting material damage mechanisms and optimizing material performance.
Article
Polymer Science
Giorgia Scetta, Jianzhu Ju, Nathan Selles, Patrick Heuillet, Matteo Ciccotti, Costantino Creton
Summary: In the study, it was found that commercial thermoplastic polyurethane elastomers (TPU) exhibit a self-reinforcement effect in cyclic mechanical behavior, which differs from the common softening effect. This stiffening effect may be related to the fragmentation of hard domains naturally present in TPU, forming more physical crosslinking points, potentially explaining the well-known toughness and wear resistance of TPU.
JOURNAL OF POLYMER SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Yinjun Chen, Gaelle Mellot, Diederik van Luijk, Costantino Creton, Rint P. Sijbesma
Summary: Mechanochemistry offers a unique approach to studying macroscopic properties of polymer materials through investigating mechanophores, which is crucial in materials science.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Yinjun Chen, C. Joshua Yeh, Qiang Guo, Yuan Qi, Rong Long, Costantino Creton
Summary: A mechanochemistry based approach using Spiropyran (SP) as a force sensitive molecular probe in multiple network elastomers (MNE) is proposed to detect and map stress history during dynamic processes. The color changes from Spiropyran to Merocyanine and subsequent reversible isomerization of Merocyanine provide insights into the stress experienced by the material. The color changes can be used to accurately map stress history during loading and unloading processes, showing excellent agreement with finite element simulations on fractured samples.
