Article
Construction & Building Technology
Manisha Malik, Sriman Kumar Bhattacharyya, Sudhirkumar Barai
Summary: In this study, a material-porosity-based approach is proposed to predict the temperature field that structural elements were subjected to during fire incidents. The correlations among temperature, strength, and porosity for normal and high strength concrete are proposed based on the evaluation of concrete porosity. Back-scattered electron imaging is found to be the most suitable method for porosity evaluation.
MATERIALS AND STRUCTURES
(2022)
Article
Construction & Building Technology
S. Divya Rani, Av Rahul, Manu Santhanam
Summary: The porosity of historic lime mortars significantly affects their mechanical characteristics and durability. Different techniques were used in this study to investigate the porosity of two types of historic lime mortars, and comparing the results from various analytical methods provided a better understanding of the pore system in historic mortars.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Biomedical
Furqan A. Shah, Martina Jolic, Chiara Micheletti, Omar Omar, Birgitta Norlindh, Lena Emanuelsson, Hakan Engqvist, Thomas Engstrand, Anders Palmquist, Peter Thomsen
Summary: Calcium phosphates (CaP) are important biomaterials for bone regeneration. This study demonstrates how a multi-component CaP formulation can guide bone formation beyond the normal physiological range. The study shows successful bone formation and remodeling in sheep models using this CaP formulation, and the presence of woven bone and vascularized lamellar bone in the pores of the CaP material.
BIOACTIVE MATERIALS
(2023)
Article
Construction & Building Technology
Song Jin, Jikai Zhou, Xiyao Zhao, Lu Sun
Summary: Cementitious materials have a complex pore structure, with microscale pores having a significant impact on material strength. The influence function shows that the effect of pores on strength increases with pore size, particularly at larger sizes. Microscale pores should be avoided to improve material strength.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Honggao Xie, Xijian Li, Feng Xue, Hao Sui, Jiajia Zhao, Junjie Cai, Cong Feng
Summary: Experiments on corrosion reactions of pulverized coal with monomeric and polymeric acid solutions reveal that the corrosion effects of monomeric acids in descending order are HF, HCl, and CH3COOH. Acidization of coal samples increases the porosity and transforms certain pores, resulting in changes in gas adsorption capacity.
Article
Engineering, Chemical
Yankun Ma
Summary: This study used SEM and MIP techniques to analyze the pore structure of natural coal and investigated the influence of coalification degree on the pores using multiscale fractal analysis. The results showed that the pores in coal can be classified into different scales as seepage pores, transition pores, and mesopores, and the size and volume of the pores have a direct impact on the multiscale fractal dimensions.
Article
Environmental Sciences
Kuan Liu, Wanjun Ye, Pengwei Long
Summary: This study investigates the microscopic mechanisms of variation in shear strength of acid- and alkali-contaminated loess. The results show that acid contamination deteriorates the shear properties of loess, while alkali contamination improves them. Acid contamination intensifies structural damage in loess, while alkali contamination balances local damage and enhances the degree of structural connection.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Environmental Sciences
Zhiqing Li, Zhiyu Qi, Shengwen Qi, Linxin Zhang, Xiaokun Hou
Summary: The Loess Plateau is a vital area for land creation projects, with important implications for city development and infrastructure safety. Different states of loess (intact, compacted, remolded) exhibit differences in microstructural characteristics, with remolded loess showing lower compressibility and specific surface area. Compacted loess at higher densities display specific particle structure changes under high-energy impact load. The threshold value of dry density at 1710 kg/m(3) + 10 kg/m(3) defines the boundaries and micro-macro relationships among the different states of loess.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Environmental Sciences
Zhiqing Li, Shengwen Qi, Zhiyu Qi, Linxin Zhang, Xiaokun Hou
Summary: Loess in northern China, known for soil erosion and shortage of urban land, poses challenges for filling construction due to moisture loss, water shortage, and construction costs. This study compares intact and compacted loess microstructures, revealing that both exhibit trimodal PSDs and a compaction mechanism involving pore size transformation and particle rearrangement. Understanding these properties is crucial for improving engineering safety in loess areas.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Engineering, Manufacturing
L. Celko, V Gutierrez-Cano, M. Casas-Luna, J. Matula, C. Oliver-Urrutia, M. Remesova, K. Dvorak, T. Zikmund, J. Kaiser, E. B. Montufar
Summary: This study comprehensively characterized the porosity of hydroxyapatite ceramic parts through multiple experimental methods, focusing on engineered pores and hollow defects. Guidelines to avoid the formation of hollow defects were discussed, along with highlighting experimental methods for distinguishing between pores and hollow defects.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Biomedical
Peifang Dee, Sharlene Tan, Hortense Le Ferrand
Summary: This study utilized a direct material extrusion approach to 3D print water-based inks containing CaP microplatelets, resulting in microstructured scaffolds with various designs. The versatile CaP microstructured objects demonstrated good shape retention and print fidelity. The extruded filaments featured a core-shell microstructure with graded microplatelet orientations, providing potential for use in hard tissue engineering applications.
INTERNATIONAL JOURNAL OF BIOPRINTING
(2022)
Article
Chemistry, Multidisciplinary
Kunyu Li, Chong Wang, Jianguo Li, Liang Xie, Yumo Wu, Shuangyang Li
Summary: This study applied a statistical principle to investigate the microscopic characteristics of nano-silica modified silty clay. Mercury intrusion porosimetry was used to measure the micro-pore parameters of different mass contents of nano-silica modified silty clay. The results show that the micro-pore parameters exhibit significant randomness and uncertainty, and the soil pores become smaller and more compacted. Additionally, various probability distributions were compared and the normal distribution was found to have the best descriptive effect for the statistical characteristics of the modified soil.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Cristine S. de Oliveira, Richard Kohns, Felix Meyerhoefer, Simon Carstens, Dirk Enke, Ralf B. Wehrspohn, Juliana Martins de Souza e Silva
Summary: Glass foams with a complex multimodal pore structure were successfully synthesized and characterized in this study for the first time, using a combination of techniques including N-2 sorption, Hg intrusion, scanning electron microscopy, and high-resolution X-ray computed tomography. The results revealed the effectiveness of a multi-technique approach in characterizing pores and developing novel porous materials with features in the nanometric range.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Energy & Fuels
Zhen Liu, Danliang Zhu, He Yang, Wendi Wang, Wenzhi Yang
Summary: This paper investigates the coal samples from four main mining areas in China with different metamorphic grades using nuclear magnetic resonance (NMR), mercury intrusion porosimetry (MIP), and scanning electron microscopy (SEM). The study examines the fissure-pore structure parameters and fractal characteristics of the coal bodies, revealing the influence of reservoir formation on the complexity of the coal body structure. The research results provide important scientific guidance for enhancing coalbed methane recovery and mine disaster prevention.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2022)
Article
Materials Science, Ceramics
Alessandro Filipponi, Giulia Masi, Maria Chiara Bignozzi
Summary: This study aims to investigate the influence of parameters such as Na/Al molar ratio, water content, and pressure load on the physical, microstructural, and durability properties of one-part pressed geopolymers. The results show that these parameters play a key role in controlling the properties of geopolymers and optimizing them can lead to geopolymers suitable for microfiltration flat membrane support. The best performances in terms of durability are obtained when using the highest pressure load (20 MPa) and water content (15%).
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Mouad Essani, Jean-Yves Mevellec, Baptiste Charbonnier, Philippe Moreau, Hilel Moussi, Pierre Weiss, Jean Le Bideau, Maxime Bayle, Bernard Humbert, Patricia Abellan
Summary: The development of instruments combining multiple characterization and imaging tools has driven advancements in material science, engineering, biology, and other related fields. This study reports the use of a cryo-FIB-SEM-mu Raman instrument to assess the accuracy of cryo-fixation methods for studying vitreous materials with high water content, providing a reliable approach to avoid imaging artifacts.
ANALYTICAL CHEMISTRY
(2022)
Review
Materials Science, Multidisciplinary
Marie-Michele Germaini, Sofiane Belhabib, Sofiane Guessasma, Remi Deterre, Pierre Corre, Pierre Weiss
Summary: Additive manufacturing, particularly in the field of bone regeneration, has gained significant interest in the medical field. Various 3D printing techniques have been used to print medical devices and assist in surgical planning. This review compares different materials and additive manufacturing processes, highlighting their advantages and drawbacks in relation to clinical applications and the expectations of patients and clinicians.
PROGRESS IN MATERIALS SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Constance Lesage, Marianne Lafont, Pierre Guihard, Pierre Weiss, Jerome Guicheux, Vianney Delplace
Summary: The osteochondral (OC) unit is essential for joint lubrication and bone constraint transmission. Currently, there is no curative treatment for OC defects, making OC regeneration a medical challenge. Over the past two decades, tissue engineering strategies have been proposed, but successful clinical translation has been limited. This systematic review provides insights into material-assisted strategies for OC regeneration, including therapeutic potential and evaluation methods.
Article
Materials Science, Biomaterials
Christelle Demarquay, Lara Moussa, Gildas Rethore, Fabien Milliat, Pierre Weiss, Noelle Mathieu
Summary: This study analyzed the immune response of the host to the injection of silanized hydroxypropyl methylcellulose (Si-HPMC)-embedded human mesenchymal stromal cells (MSCs) in a rat model of colorectal damage induced by ionizing radiation. The results showed that Si-HPMC protects MSCs from specific antibody production and lymphocyte-induced apoptosis. Additionally, Si-HPMC does not affect innate immune response infiltrate in vivo and enhances macrophage regenerative response through modulation of Wnt-family and VEGF gene expression.
REGENERATIVE BIOMATERIALS
(2022)
Article
Chemistry, Physical
Jean-Yves Runser, Miryam Criado-Gonzalez, Fatima Fneich, Morgane Rabineau, Bernard Senger, Pierre Weiss, Loic Jierry, Pierre Schaaf
Summary: This study demonstrates the application of enzyme-assisted self-assembly (EASA) in functionalizing host gels. By controlling the concentrations of enzymes and peptides, self-assembled patterns can be formed on the surface and within the gels, leading to changes in the mechanical properties of the gels.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Biomedical
Arnaud Pare, Baptiste Charbonnier, Joelle Veziers, Caroline Vignes, Maeva Dutilleul, Gonzague De Pinieux, Boris Laure, Adeline Bossard, Annaelle Saucet-Zerbib, Gwenola Touzot-Jourde, Pierre Weiss, Pierre Corre, Olivier Gauthier, David Marchat
Summary: The reconstruction of massive segmental mandibular bone defects is still challenging, and vascularized bone transplantation is currently the gold standard in human clinics. However, bone tissue engineering strategies have limited clinical success, particularly in terms of quick vascularization of the implant. In this study, a custom vascularized bone construct was successful in regenerating massive segmental mandibular defects and showed faster osseointegration and vascularization compared to the traditional approach.
ACTA BIOMATERIALIA
(2022)
Article
Polymer Science
Miryam Criado-Gonzalez, Jean-Yves Runser, Alain Carvalho, Fouzia Boulmedais, Pierre Weiss, Pierre Schaaf, Loic Jierry
Summary: Phosphatase-modified silica nanoparticles are encapsulated in hydroxypropylmethylcellulose hydrogels, and peptides are self-assembled through enzyme-assisted reactions. The diffusion of nanoparticles is limited, enabling spatial control of peptide self-assembly.
Article
Biotechnology & Applied Microbiology
Pauline Marie Chichiricco, Pietro Matricardi, Bruno Colaco, Pedro Gomes, Christine Jerome, Julie Lesoeur, Joelle Veziers, Gildas Rethore, Pierre Weiss, Xavier Struillou, Catherine Le Visage
Summary: In recent years, multicomponent hydrogels, such as interpenetrating polymer networks (IPNs), have gained attention as innovative biomaterials due to their synergistic combination of properties. This study explores an innovative non-animal IPN hydrogel that combines self-setting silanized hydroxypropyl methylcellulose (Si-HPMC) with photochemically cross-linkable dextran methacrylate (DexMA) as a potential alternative to porcine collagen membranes in guided bone regeneration. Results showed that the IPN hydrogel exhibited improved physicochemical properties and instant gel formation under visible light. The cytocompatibility and mineral deposition in critical-size defects were comparable to the positive control, demonstrating the potential of this IPN hydrogel as an alternative to animal-derived collagen membranes.
BIOENGINEERING-BASEL
(2023)
Article
Chemistry, Physical
Jean-Yves Runser, Fatima Fneich, Bernard Senger, Pierre Weiss, Loic Jierry, Pierre Schaaf
Summary: Enzyme-assisted self-assembly within host materials leads to spatial structuration similar to Liesegang pattern when precursor peptides diffuse through an enzyme-functionalized hydrogel. By manipulating peptide and enzyme concentrations, a transition from continuous self-assembled peptide areas to individual microglobules is observed. The morphology, location, size, and buildup mechanism of the microglobules are described. Moreover, it is found that enzymes adsorb onto the peptide self-assemblies, resulting in co-localization of peptide self-assembled microglobules and enzymes. Lastly, a process of Ostwald ripening is observed, where larger microglobules grow at the expense of smaller ones present nearby, demonstrating the dynamic nature of peptide self-assembly within host hydrogels.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Biomedical
Maxence Limelette, Claire De Fourmestraux, Christelle Despas, Audrey Lafragette, Joelle Veziers, Yohan Le Guennec, Gwenola Touzot-Jourde, Lefevre Francois-Xavier, Elise Verron, Bouler Jean-Michel, Bruno Bujoli, Olivier Gauthier
Summary: The presence of blood delays the setting reaction of calcium phosphate cement. The composite material with blood requires around 10 hours to harden, but shows improved cohesion after injection. The addition of blood facilitates the replacement of the composite material by newly formed bone.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Review
Biochemistry & Molecular Biology
Chaymaa Hachimi Alaoui, Gildas Rethore, Pierre Weiss, Ahmed Fatimi
Summary: Different techniques have been developed to extract lignin biopolymer from lignocellulosic biomass. Lignin has gained considerable interest in the biomedical field due to its attractive properties and has been used in the preparation of value-added products such as hydrogels. Lignin-based hydrogels have shown great potential for various biomedical applications, and their copolymerization with other polymers and biopolymers further expands their possibilities.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Meeting Abstract
Cell & Tissue Engineering
Constance Lesage, Marianne Lafont, Pierre Guihard, Pierre Weiss, Jerome Guicheux, Vianney Delplace
TISSUE ENGINEERING PART A
(2023)
Article
Materials Science, Multidisciplinary
Mouad Essani, Baptiste Charbonnier, Nicolas Stephant, Hilel Moussi, Pierre Weiss, Jean Le Bideau, Patricia Abellan
Summary: The microporosity and phase distribution of CDHA/hydrogel composites can be modified by mixing with different hydrogels. Low dose structural and chemical analysis using electron microscopy provides in-depth understanding of these materials. The study also highlights the importance of cryogenic temperatures for sample preparation and characterization, as hydration levels can affect the structural properties.
MATERIALS ADVANCES
(2023)
Meeting Abstract
Cell & Tissue Engineering
Marie-Michele Germaini, Marie-Michele Germaini, Pierre Weiss, Sofiane Belhabib, Sofiane Guessasma, Joelle Veziers, Steven Nedellec, Helene Gautier, Boris Halgand, Benoit Furet, Remi Deterre, Thierry Rouillon, Pierre Corre
TISSUE ENGINEERING PART A
(2022)
Meeting Abstract
Cell & Tissue Engineering
Catherine Le Visage, Perrine de Villemagne, Benoit Rosa, Paul Patreau, Vianney Delplace, Pierre Weiss, Franck Halary, Jerome Guicheux, Jean-Yves Hascoet
TISSUE ENGINEERING PART A
(2022)
