Article
Materials Science, Characterization & Testing
N. Lorenz, M. Mueller-Pabel, J. Gerritzen, J. Muller, B. Groeger, D. Schneider, K. Fischer, M. Gude, Ch Hopmann
Summary: A fast crosslinking reaction is crucial for the economical production of automotive components in liquid composite molding processes. This study provides comprehensive results on the characterization of thermo-mechanical properties, pressure dependent reaction kinetics and shrinkage of fast curing epoxy resins, which give important advice for improved process modeling and facilitate prioritisation for future characterization of such resins.
Article
Engineering, Chemical
Feng Wang, Zhuonan Huang, Yuqi Wang, Di Wang, Lan Zheng, Le Wu, Xin Ding, Dandi Li, Zaoxiao Zhang
Summary: An universal changing-volume model (UCVM) was proposed to describe the hydrogenation/dehydrogenation kinetics of metal hydrides, which showed high prediction accuracy under various operation conditions and was verified through experiments. UCVM also demonstrated broad adaptability for other metal hydrides.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Aerospace
Fuhao Zhang, Weixuan Zhang, Qingchun Lei, Xuesong Li, Yuyang Li, Min Xu
Summary: Volumetric reconstructions of transparent or translucent mediums are critical for various applications. This study proposes a neural volume reconstruction technique (NVRT) that uses a neural network to represent the continuous flame luminosity implicitly. The NVRT method is superior to the traditional algebraic reconstruction technique (ART) in terms of reconstruction fidelity, resistance to noise, and computational cost.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
G. H. Lin, L. J. Li, H. Xiang, J. Ye, H. P. Xiang, Z. Q. Li, X. X. Liu
Summary: This study presents an effective strategy for reducing volume shrinkage in 3D printing based on SOC chemistry, and systematically investigates the kinetics of ring-opening photopolymerization. By using DB-TOSU as an expanding monomer, significant reduction in volume shrinkage and enhanced toughness of the resin were achieved. DB-TOSU demonstrates promising application prospects in 3D printing due to its compatibility with printing resin and high printing accuracy after volume expansion.
EXPRESS POLYMER LETTERS
(2021)
Article
Engineering, Biomedical
Chuanyue Sun, Dongyu Xu, Chengyi Hou, Hui Zhang, Yaogang Li, Qinghong Zhang, Hongzhi Wang, Meifang Zhu
Summary: A radiopaque dental composite with enhanced radiopacity, low shrinkage, and improved mechanical properties was developed by preparing monodispersed SZS microspheres and adjusting the composition. This radiopaque resin has the advantage of being nondestructive clinically, making it suitable for practical applications in dentistry.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Computer Science, Software Engineering
S. Mazdak Abulnaga, Oded Stein, Polina Golland, Justin Solomon
Summary: This paper proposes a method for shape correspondence in volumetric data and selects a preferred energy function that favors isometric correspondences through theoretical discussion. The method is demonstrated to produce boundary-aligned and low-distortion matchings on diverse geometric datasets.
ACM TRANSACTIONS ON GRAPHICS
(2023)
Article
Chemistry, Multidisciplinary
Xin Liu, Huanghu Wu, Wei Xu, Yu Jiang, Junheng Zhang, Bangjiao Ye, Hongjun Zhang, Sufang Chen, Menghe Miao, Daohong Zhang
Summary: This study presents the preparation of hyperbranched epoxy resins with imide structures, which exhibit excellent comprehensive properties in terms of strength, modulus, toughness, low-temperature resistance, and degradability. By controlling the molecular free volume properties, the conflicts between strength and toughness and between high performance and highly efficient degradation are successfully resolved, providing a new approach for designing ultrastrong, tough, and recyclable thermoset epoxy resins.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Agata Szczesio-Wlodarczyk, Aleksander Polikowski, Michal Krasowski, Magdalena Fronczek, Jerzy Sokolowski, Kinga Bociong
Summary: This study investigated the mechanical properties and hardness of five matrices and composites based on bis-GMA and UDMA resins. The addition of HEMA showed a positive effect on the properties of the materials, possibly due to improved mobility of bis-GMA and UDMA monomers.
Article
Chemistry, Multidisciplinary
Amel Amirouche-Korichi, Samir Bayou, Mohamed Mouzali
Summary: The study developed experimental dental prosthesis formulations based on methacrylic resins and investigated the effects of four crosslinking agents and four radiopacifying mineral fillers on degree of conversion and volumetric shrinkage. The results showed that the chain length and weight content of crosslinking agents influenced the degree of conversion and volumetric shrinkage.
REVUE ROUMAINE DE CHIMIE
(2022)
Article
Materials Science, Multidisciplinary
Kun Wang, Zhengzhi Wang
Summary: Photopolymerized materials are widely used in various industrial applications, but the polymerization shrinkage stress during the photopolymerization process affects their service quality and life. In this study, a comprehensive theoretical model is developed to accurately predict and understand the evolution of shrinkage stress. The model is validated through experimental measurements, showing good agreement with the predicted stresses and providing valuable insights for reducing shrinkage stress and optimizing material properties.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Jeong Hui Lee, Taekyung Lim, Keumyoung Seo, Jeeyin Park, Jonguk Yang, Sang-Mi Jeong, Sanghyun Ju
Summary: The study proposes a novel method for fabricating PDMS fibers using thermal curing and stretching, without the need for molds. The resulting PDMS fibers have excellent transparency and mechanical strength, and can be functionalized for different applications.
NPG ASIA MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Hui Zhang, Hui Su, Mikhail A. Soldatov, Yuanli Li, Xu Zhao, Meihuan Liu, Wanlin Zhou, Xiuxiu Zhang, Xuan Sun, Yanzhi Xu, Peng Yao, Shiqiang Wei, Qinghua Liu
Summary: Accurately manipulating the electronic structure of metal active sites is crucial for efficient electrocatalysis in water-alkali electrolyzers. The study presented a new approach by constructing cobalt nanoparticles with atomically dispersed Ru single-sites for effective catalysis of alkaline hydrogen evolution reaction. Operando X-ray absorption and infrared spectroscopies revealed a dynamic Co-Ru bond shrinkage with strong electron coupling effect, leading to significantly enhanced HER activity.
Article
Thermodynamics
Jaewook Lee, Byung-Dae Park
Summary: This study investigates the thermal cure kinetics of cold-setting MUF resins with different melamine contents using differential scanning calorimetry. The results show that the activation energy of the resins decreases as the degree of conversion increases, regardless of melamine content. However, the activation energy, isoconversional activation energy, and peak temperature increase as the melamine content increases. The KAS and Vyazovkin methods are reliable in estimating the cure kinetics of these resins.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Polymer Science
Junji Ueyama, Ryo Ogawa, Yasuyuki Mori, Yoshio Furusho, Akihiko Tsuge, Takeshi Endo
Summary: The effect of urea derivatives (UDs) on volume shrinkage during the curing process of BAGE/DCBE/PAH was studied. UDs with N-H bonds and bulky substituents effectively reduced the volume shrinkage. Before curing, UDs were dispersed in the composition, but after curing, they dissolved in the cured compounds due to collapse of dense packing based on hydrogen bonding and/or p-stacking. Furthermore, the curing behavior and structure of the cured materials were analyzed using DSC and IR. The results showed that UDs had minimal impact on the curing of the DCBE/BAGE/PAH system.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Biomedical
Jose Abraham Gonzalez-Lopez, Abril Fonseca-Garcia, Ricardo Acosta-Ortiz, Rebeca Betancourt-Galindo, Erick Martinez-Ruiz, Maria Esther Trevino-Martinez
Summary: This study synthesized a monomer MVTPM and evaluated its performance in composite resin formulations. The experimental results showed that the MVTPM monomer has potential applications in dental composite resin formulations and can improve the hydrolytic behavior, hygroscopic behavior, and shrinkage stress of the resin.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Carolina Bosso Andre, Pedro Luiz Rosalen, Marcelo Giannini, Bruno Bueno-Silva, Carmem Silvia Pfeifer, Jack Liborio Ferracane
Summary: The study aimed to reduce the virulence of Streptococcus mutans around dental restorations by incorporating two anti-caries agents, Apigenin and tt-Farnesol, into resin composite and resin cement. Results showed that Apigenin alone and in combination with tt-Farnesol reduced the bacterial polysaccharides content without affecting bacterial viability. The additions did not compromise the physicochemical properties of the composites.
Article
Dentistry, Oral Surgery & Medicine
Marcos Vinicius Salvador, Bruna M. Fronza, Vanessa Galego Arias Pecorari, Fabricio A. Ogliari, Roberto Ruggiero Braga, Joe D. Oxman, Adriano F. Lima
Summary: This study evaluated the mechanical properties of two different dimethacrylate resin blends and found that resins containing amines showed better performance compared to amine-free resins. The addition of iodonium salt improved the degree of conversion of resins, even without an amine co-initiator. The amine-free initiator system was more effective when used with UDMA versus BisGMA based-resins.
Article
Engineering, Chemical
Marina D. S. Chiari, Yvette Alania, Ana K. Bedran-Russo, Roberto R. Braga
Summary: The experimental adhesives containing calcium-releasing particles showed reduced MMP activity at the adhesive interfaces, but did not affect interfacial stability after two months according to bond strength and micro-permeability results.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Crystallography
Handially Santos Vilela, Marcela Charantola Rodrigues, Bruna Marin Fronza, Rafael Bergamo Trinca, Flavio Maron Vichi, Roberto Ruggiero Braga
Summary: The synthesis of calcium orthophosphates is influenced by temperature and pH conditions, affecting precipitation yield, phase formation, and particle size distribution. Dicalcium phosphate dihydrate is favored under acidic conditions, while hydroxyapatite is formed under nearly neutral pH.
CRYSTAL RESEARCH AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Beatriz Curvello de Mendonca, Beatriz de Cassia Romano, Maicon Sebold, Bruna Marin Fronza, Roberto Ruggiero Braga, Gabriel Nima, Richard Bengt Price, Marcelo Giannini
Summary: The study evaluated the performance of one conventional resin composite and five bulk-fill restorative materials in terms of polymerization shrinkage stress, internal gap formation, and dentin bond strength. Results showed variations among the materials in terms of these properties.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Dentistry, Oral Surgery & Medicine
F. S. de Lucena, S. H. Lewis, A. P. P. Fugolin, A. Y. Furuse, J. L. Ferracane, C. S. Pfeifer
Summary: This study combined an acrylamide-based adhesive with a thiourethane-based composite to improve bond stability and reduce polymerization stress of composite restorations. The results showed that the multiacrylamide-based adhesive was able to maintain a stable resin-dentin bond under physiological conditions.
JOURNAL OF DENTAL RESEARCH
(2022)
Article
Engineering, Biomedical
Amanda Lopes Campos, Bruna Marin Fronza, Marcela Charantola Rodrigues, Marina Damasceno E. Souza Chiari, Roberto Ruggiero Braga
Summary: The study investigated the impact of CaP:glass ratio on the conversion degree and mechanical properties of resin-based composites containing either TEGDMA-functionalized DCPA or non-functionalized DCPA particles. The results showed that functionalized DCPA particles improved the conversion degree and strength of the materials, but had no significant effect on the modulus.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ana P. P. Fugolin, Jack L. Ferracane, Carmem S. Pfeifer
Summary: Research on dental self-healing polymers has made significant progress in recent years, showing promising potential for extending the clinical lifespan of dental restorations. This study innovatively incorporates the high toughness component DMAM into microcapsule-based healing agent systems and analyzes the change in crack propagation behavior. The results demonstrate that the addition of DMAM as a cushioning agent successfully increases the toughness of the polymeric network and impedes crack propagation.
MATERIALS & DESIGN
(2022)
Article
Engineering, Biomedical
Andrei Cristian Ionescu, Sebastian Hahnel, Marina D. S. Chiari, Andreas Koenig, Paolo Delvecchio, Roberto Ruggiero Braga, Vanessa Zambelli, Eugenio Brambilla
Summary: This study evaluated the efficacy of experimental resin-based composites containing TEGDMA-functionalized dicalcium phosphate dihydrate (T-DCPD) filler in preventing caries lesions around the restoration margins. The results showed that the experimental material containing 40 wt.% T-DCPD filler significantly reduced the depth of the lesions, while the material containing 60 wt.% Ba glass did not effectively prevent caries.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ryan Schmidt, Matthew G. Logan, Sarah Patty, Jack L. Ferracane, Carmem S. Pfeifer, Alexander J. Kendall
Summary: A careful analysis of the behavior of two thiol quantification chromophores (Ellman's reagent and Aldrithiol-4) in nonaqueous solvents is presented, showing a wide range of kinetic profiles and response factors and a large variance for nonaqueous systems. Several robust benchtop and room-temperature methods using different organic solvents are reported and compared to aqueous conditions. The validation of analytical analyses in nonaqueous systems and the quantification of cysteine content in ovalbumin are also presented. This work serves as a treatise on the utilization of thiol-disulfide exchange chromophores under nonaqueous conditions for thiol quantification.
Article
Engineering, Biomedical
Amanda Lopes Campos, Beatriz Fonseca Vela, Lincoln Pires Silva Borges, Rafael Bergamo Trinca, Carmem Silvia Pfeifer, Roberto Ruggiero Braga
Summary: The interrelationships among handling, degree of conversion, mechanical behavior and Ca2+ release of composites containing dicalcium phosphate dihydrate (DCPD) were investigated by changing the total inorganic content and DCPD: glass ratio. The results showed that the viscosity and degree of conversion increased with DCPD: glass ratio. At inorganic fractions of 40 vol% and 50 vol%, keeping DCPD content at a maximum of 30 vol% did not compromise fracture toughness. Ca2+ release showed an exponential relationship with DCPD mass fraction, with a maximum release of 3.8% after 14 days. The best compromise between viscosity, fracture toughness and Ca2+ release was found in formulations containing 30 vol% DCPD and 10-20 vol% glass.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Engineering, Biomedical
Fernanda Furuse Ventura dos Santos, Stefan Habelitz, Fabio Dupart Nascimento, Victor Elias Arana-Chavez, Roberto Ruggiero Braga
Summary: This study aimed to verify the effectiveness of poly(aspartic acid), pAsp, in dentin regeneration using an animal model. The results showed that pAsp promoted dentin regeneration in rat molars and may be an alternative to MTA as a pulp-capping agent.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Larissa Maria Cavalcante, Amanda Barreto Ramos, Daniela Costa Silva, Gutemberg Gomes Alves, Karinne Bueno Antunes, Carmem Silvia Pfeifer, Luis Felipe Jochims Schneider
Summary: The study found that thiourethane-functionalized fillers did not significantly affect the antimicrobial properties and cytotoxicity of experimental composites, and these materials showed equivalent properties to those conventionally used in dentistry.
BRAZILIAN ORAL RESEARCH
(2021)
Article
Materials Science, Biomaterials
A. P. P. Fugolin, A. R. Costa, S. H. Lewis, M. Goulart, M. C. Erhardt, C. S. Pfeifer
Summary: The addition of thiourethane prepolymer into composite materials can reduce polymerization stress and improve fracture toughness. The study indicates that thiourethane networks undergo various reversible chemical reactions, enhancing stress relief capabilities.
JOURNAL OF MATERIALS CHEMISTRY B
(2021)
Article
Polymer Science
Mustafa Kalay, Abidin Esidir, Mahmut Ruzi, N. Burak Kiremitler, Mustafa Serdar Onses
Summary: This study proposes stable and addressable polymer PUFs, utilizing a cross-linkable polymer system, which demonstrates high stochastic characteristics and low-cost production. The performance of the polymer features is evaluated through various analyses, and direct image authentication is achieved using feature matching algorithms.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jingyu Jin, Guoqiang Lu, Jun Nie, Xiaoqun Zhu
Summary: Photopolymerization technology is limited in the fields of food packaging and biomedicine due to the high migration of small molecules from photoinitiators. In this study, a polymerizable 2-vinyl thioxanthone (ETX) was synthesized to improve the migration stability of photoinitiators. Macromolecular photoinitiators (PPI1, PPI2) were also prepared to further reduce migration. The results showed that the ETX/TEOA system had higher initiation performance and PPI2 displayed favorable initiation ability. Additionally, the migration of ETX, PPI1, and PPI2 in photocured film was significantly reduced. These low-migration photoinitiators have potential applications in the fields of food packaging and biological materials.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Weijie Li, Jun Nie, Yingying Zhao, Xiaoqun Zhu
Summary: This study focuses on the development of high-performance, low-migration photoinitiators. A polymerizable photoinitiator (VBP) was synthesized by introducing an ethylene group into benzophenone, and three different molecular weight single-component photoinitiators (PVBN1-3) were synthesized based on VBP. The results show that these new photoinitiators have stronger absorption ability compared to benzophenone and significantly reduce the migration of initiators and co-initiators, addressing the safety concerns caused by migration.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Seira Morimune-Moriya, Yuki Iwahashi, Mitsuru Nakamura, Daisuke Ogawa, Keiji Nakamura
Summary: This study investigates the effect of plasma treatment on carbon nanotubes (CNTs) and the structure/properties of polyimide (PI) nanocomposites with ultra-low content of CNTs. The results show that plasma treatment introduces isocyanate groups on the surface of CNTs and enhances the interfacial interaction between PI and treated CNTs. This leads to a significant improvement in the mechanical properties of the nanocomposites, with even a small addition of treated CNTs showing a substantial increase in Young's modulus, tensile strength and toughness.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuanlong Li, Chaojie Chen, Guoqing Cui, Li Liu, Chao Zhou, Guangfeng Wu
Summary: In this study, a novel ion-conducting hydrogel was fabricated using a straightforward approach. The hydrogel showed excellent tensile properties and high toughness due to physical interactions and covalent binding. Additionally, the introduction of hydroxyethyl cellulose and lithium chloride improved the biocompatibility, mechanical properties, electrical conductivity, and frost resistance of the hydrogel, demonstrating its potential for cold climate applications.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Dengwei Yan, Jinxian Yang, Xuejun Pan, Xiaozheng Duan, Lianwei Li, Mo Zhu
Summary: The influence of backbone length on grafting efficiency during the graft-onto reaction process was investigated. It was found that the polydispersity effect of backbone length does not affect the final grafting efficiency, indicating that the local dynamics of chain segments dominate the graft-onto process.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Zhaoyi Luo, Xianjie Pan, Fanqi Liu, Quanxi Yi, Yanning Zeng, Yunhua Chen, Chaoyang Wang
Summary: This study provides a method to prepare high-performance epoxy materials with good malleability and thermal stability. The materials have self-healing and welding capabilities, thanks to the addition of specific chemical bonds and network structures. They exhibit mechanical properties comparable to commercial epoxy resins and show great potential for sustainable industrial development.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Chaoji Xiong, Hao Wang, Lihua Deng, Kun Liang, Chunhua Wu, Wei Wu, Qian Chen
Summary: In this study, four polyamides were synthesized and their adsorption performances for Hg2+ in aqueous systems were investigated. The polyamides exhibited high adsorption capacities and excellent reusability, with the involvement of sulfur, nitrogen, and oxygen in the chemical adsorption process of Hg2+.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Siim Laanesoo, Olivier Bonjour, Rauno Sedrik, Iris Tamsalu, Patric Jannasch, Lauri Vares
Summary: The insertion of rigid aliphatic or aromatic building blocks in polymer structures is an effective way to synthesize high -Tg polymer materials. In this study, a series of isosorbide-2-aryl carboxylate-5-methacrylate monomers (ArIMAs) were synthesized by functionalizing isosorbide 5-methacrylate with various aromatic lignin-inspired esters. These monomers were polymerized to obtain high molecular-weight poly(aryl carboxylate isosorbide methacrylates) (PArIMAs). The resulting polymers showed high glass transition temperatures and thermal stability, making them suitable for use as high-performance plastics and coatings.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuqian Wu, Weijie Xu, Jianliang Li, Zhangfeng Zhong, Liqing Huang, Shengke Li, Huaping Tan
Summary: This study investigates the improvement of degradation and drug release characteristics of dynamic Schiff base-mediated natural polysaccharide hydrogels using tannic acid (TA), leading to enhanced stability and functionality.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Xi Zhang, Xiangli Kong, Xin Zhou, Yiyan Gao, Yibo Sun, Guanghui Gao, Wei Liu, Kai Shi
Summary: Conductive hydrogels have great development prospects in flexible strain sensors, but long-term direct contact with human skin can cause bacterial infection. A hydrogel with antibacterial, biocompatibility, and toughness was designed and manufactured using a freeze-thaw method. The hydrogel maintains tensile properties and fatigue resistance at low temperatures and is resistant to bacteria. Therefore, hydrogel sensors can be used to monitor human movements.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Wei Zhang, Jiangang Yu, Mingyang Wu, Rui Li, Anqiang Zhang, Yaling Lin
Summary: In this study, polyacrylamide containing quaternary ammonium salts (PAM-X) were synthesized and found to effectively inhibit soil-borne pathogenic fungi while maintaining the balance of microbial population in soil. PAM-X also showed low toxicity to earthworms and fish, providing a new method for the prevention and control of soil-borne fungal diseases.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jiawen He, Haojie Yu, Li Wang, Jian Yang, Yanhui Zhang, Wenbing Huang, Chenguang Ouyang
Summary: This review discusses the use of polymeric hydrogels for atmospheric water harvesting (AWH), including the mechanism of water sorption, fabrication methods, and strategies for optimizing the structure of hydrogels. The extended applications of hygroscopic photothermal hydrogels, such as agricultural irrigation and dehumidification, are also explored. The challenges and prospects of using polymeric hydrogels for AWH are summarized.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Ying Du, Shuaishuai Lu, Yuanna Sun, Qingshan Li, Xinhai He
Summary: This study introduces a method to improve the performance of hydrogels by incorporating proline, resulting in hydrogels with excellent stretchability, high conductivity, and long-term stability. The hydrogel remains flexible and conductive even at ultra-low temperatures.
EUROPEAN POLYMER JOURNAL
(2024)
