Article
Engineering, Multidisciplinary
Tianyi Zheng, Yingjie Yu, Yanyun Pang, Daixing Zhang, Yue Wang, Hongyang Zhao, Xu Zhang, Huijie Leng, Xiaoping Yang, Qing Cai
Summary: The reconstruction of the local electrical microenvironment is an effective strategy for bone regeneration. CMBT nanofibers composited with PLLA showed enhanced piezoelectricity, osteogenic activity, antibacterial, and anti-inflammatory activities, making them promising candidates for bone regeneration and function reconstruction.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Composites
Sina AhmadvashAghbash, Christian Breite, Mahoor Mehdikhani, Yentl Swolfs
Summary: Longitudinal fibre-matrix debonding is influenced by various factors such as interfacial strength, fracture toughness, thermal residual stresses, friction, and matrix plasticity. The proposed finite element model accounts for these factors and allows for debond propagation based on assigned interfacial properties. Parametric studies demonstrate that higher values for interfacial friction coefficient, thermal residual stress, and interfacial fracture toughness restrict debond propagation, while matrix plasticity facilitates it.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Polymer Science
Mengyuan Zhang, Zhonghua Chang, Xiaofeng Wang, Qian Li
Summary: Biodegradable and bioabsorbable PLCL has been widely used in tissue engineering and regenerative medicine, and its synthesis and structure-activity relationship need further investigation for tuning mechanical properties. Optimizing the synthesis conditions of PLCL can increase yield and enhance properties, while adjusting the monomer ratio and polymerization time can impact mechanical properties, resulting in PLCL suitable for dynamic mechanical environments.
Article
Engineering, Multidisciplinary
Christopher Meninno, Vijaya Chalivendra
Summary: The study investigated the impact of different laminate orientations on mode-I and mode-II fracture toughness, as well as the correlation between fracture toughness values and scanning electron microscopy images. The results showed that C-0-G-90 composites exhibited higher mode-I fracture toughness, while G-0-C-90 composites showed higher mode-II fracture toughness. The electrical response was found to be closely related to crack dynamics.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Polymer Science
Yipeng Chen, Jiangang Zhang, Yuesheng Zhang, Wen Cao, Xiong Liu, Jianna Bao, Xianming Zhang, Wenxing Chen
Summary: Copolymerizing poly(lactide) with other materials is an effective method to improve its comprehensive performance. In this study, precursors of hydroxyl terminated PLLA, PCL, and PDLLA were prepared and copolymerized to synthesize PLLA-PCL-PDLLA copolymer. The effects of component proportion and molecular weight, as well as chain extender, on the copolymer's crystallization, phase structures, mechanical properties, and thermal stabilities were investigated. By adjusting the composition and chain length of prepolymers, the competition between crystallization and microphase separation was regulated. The obtained copolymers showed improved strength and flexibility without losing biocompatibility, providing a feasible method for obtaining high toughness and biodegradable PLA-based materials.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Dan Xiao, Song Chen, Fang-Juan Wu, Zhi-Yu Xiao, Zi-Bo Wang, Hui Fang
Summary: In this study, a novel multifunctional furan bio-based fire retardant (F-FR) was introduced to improve the fire safety of PLA. By adding only 0.8 wt% of F-FR, PLA achieved the UL-94 V-0 grade and exhibited high LOI value, thermal stability, crystallization behavior, and transparency.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Polymer Science
Fei Liu, Shan Lu, Weihong Cao, Juncheng Huang, Yi Sun, Yiting Xu, Meiling Chen, Haining Na, Jin Zhu
Summary: In this study, Cellulose-grafte-poly(L-lactide) (C-g-PLLA) copolymers were synthesized as effective compatibilizers for cellulose-PLLA composites. The effect of the molar substitution (MSPLLA) of the grafted PLLA side chain and the feeding amount of this copolymer on the properties of the composites was investigated. The results show that the copolymer improved the interfacial compatibility and the mechanical properties of the composites.
Article
Materials Science, Composites
Robert B. Zando, Ataollah Mesgarnejad, Chunzhou Pan, Sandra J. Shefelbine, Alain Karma, Randall M. Erb
Summary: Crack deflection is often used as evidence of substantial fracture toughness in composites, with recent advances in composite manufacturing allowing for the creation of detailed microstructures that can locally tune fracture toughness anisotropy. In this study, a herringbone pattern structure effectively traps propagating cracks along a spine to enhance fracture toughness, demonstrating the potential for improved material properties through structural design. The results suggest that controlling crack propagation direction can significantly boost overall material performance.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Charles J. McCutcheon, Boran Zhao, Christopher J. Ellison, Frank S. Bates
Summary: Adding PEO-PBO diblock copolymer significantly reduces the crystallization time and increases the ductility of PLLA blends without affecting the modulus. The block copolymer particles facilitate stress-induced cavitation and uniform crazing, leading to a 7-15 fold increase in tensile toughness of the blends.
Article
Biochemistry & Molecular Biology
Wiriya Thongsomboon, Prasong Srihanam, Yodthong Baimark
Summary: In this study, talcum was used as a nucleating agent to improve the heat resistance of PLLA-PEG-PLLA block copolymer. Thermoplastic starch (TPS) was also used as a low-cost filler to reduce production cost. The resulting PLLA-PEG-PLLA/talcum/TPS composites showed higher crystallinity, flexibility, and heat resistance, as well as good dimensional stability and biodegradability.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Composites
Steven Lamoriniere, Mitchell P. Jones, Kingsley Ho, Gerhard Kalinka, Milo S. P. Shaffer, Alexander Bismarck
Summary: Embedding carbon fibers in CNT-PEEK powders can significantly improve the interfacial shear strength between the fiber and the matrix. The interfacial shear strength is negatively correlated with the fiber length, indicating brittle fracture at the fiber-matrix interface. The pulled out carbon fibers are still coated with the matrix, indicating strong adhesion at the interface.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Natalia Herrera, Joanne Li, Koon-Yang Lee
Summary: This study reports a simple method of enhancing the toughness of bacterial cellulose (BC) sheet by sizing the BC nanofibrils with poly(ethylene glycol) (PEG). The PEG-sized BC sheets show high tensile strain-at-failure and work of fracture compared to neat BC sheet. Moreover, when used as reinforcement in acrylic composites, the PEG-sized BC sheets greatly improve the impact strength with a low BC loading requirement.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Chemistry, Multidisciplinary
Haemin Jeong, Jeong Suk Yuk, Hyunho Lee, Seomgyeol Kang, Hyejin Park, Sae Hume Park, Jihoon Shin
Summary: A biodegradable PLA plasticizer system was deliberately designed with an ester structure identical to PLA matrix for enhanced compatibility and tunable plasticization. The system showed lowered glass transition temperature of PLA and improved biodegradation efficiency. The ALO series exhibited compatibility with PLA, providing renewable and dual performance plasticization for the material.
Article
Materials Science, Composites
Rui He, Longfei Cheng, Yidi Gao, Hao Cui, Yulong Li
Summary: This paper investigates the effect of in-plane shear stress on the fiber kinking compressive fracture toughness of laminates using compact compression specimens with off-axis fibers. The results show that in-plane shear stress increases the values of the R-curves, leading to an increase in energy dissipation. Microscopic morphology reveals the increasing splitting of fiber bundles and subsequent fiber compression failure as the off-axis angle of the fibers increases.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Xinliang Chen, Shang Gao, Li Yang, Jie Song, Tao Song, Jiacheng Ling, Min Shi, Jin Liu, Xiusheng Wu, Ping Wang
Summary: Polylactide (PLA)-based materials with excellent rigid-toughness balance and high heat distortion temperatures (HDT) were prepared by regulating the interfacial state of the PLA/polyvinylidene fluoride (PVDF) blends. The incorporation of multifunctional epoxy chain extender (ADR) led to the formation of crosslink structure in PLA matrix, which changed the viscosity of PLA/PVDF and regulated the interfacial structure of the blends. ADR also limited the movement of the PVDF chain and significantly enhanced the interaction force between PLA and PVDF. The addition of 1.5 wt% ADR resulted in increased tensile strength, elongation at break, notch impact strength, and heat distortion temperature compared to additive-free PLA/PVDF blend.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Emilio Meaurio, Eva Sanchez-Rexach, Ester Zuza, Ainhoa Lejardi, Andrea del Pilar Sanchez-Camargo, Jose-Ramon Sarasua
Article
Materials Science, Coatings & Films
N. Monasterio, J. L. Ledesma, I. Aranguiz, A. Garcia-Romero, E. Zuza
SURFACE & COATINGS TECHNOLOGY
(2017)
Article
Materials Science, Characterization & Testing
N. Sadaba, R. Martini, F. Barthelat, I Martinez de Arenaza, A. Larranaga, J. R. Sarasua, E. Zuza
Article
Polymer Science
Naroa Sadaba, Maitane Salsamendi, Nerea Casado, Ester Zuza, Jone Munoz, Jose-Ramon Sarasua, David Mecerreyes, Daniele Mantione, Christophe Detrembleur, Haritz Sardon
Article
Materials Science, Biomaterials
Jorge Fernandez, Isabel A. C. Ribeiro, Victor Martin, Olatz L. Martija, Ester Zuza, Ana F. Bettencourt, Jose-Ramon Sarasua
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2018)
Review
Metallurgy & Metallurgical Engineering
Asier Lores, Naiara Azurmendi, Inigo Agote, Ester Zuza
Article
Biochemistry & Molecular Biology
Naroa Sadaba, Aitor Larranaga, Gemma Orpella-Aceret, Ana F. Bettencourt, Victor Martin, Manus Biggs, Isabel A. C. Ribeiro, Jone M. Ugartemendia, Jose-Ramon Sarasua, Ester Zuza
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2020)
Review
Materials Science, Characterization & Testing
Gorka Diez-Barcenilla, Jose L. Gomez-Alonso, Koldo Gondra, Ester Zuza
Summary: Epoxy tooling technology is a method for rapidly manufacturing tools for small batch production without the need for expensive metal molds. Current research is focused on improving production systems, enhancing tool performance, reducing mold costs, and enabling sustainable tool manufacturing.
POLYMERS & POLYMER COMPOSITES
(2021)
Article
Green & Sustainable Science & Technology
Gorka Diez-Barcenilla, Alexandra Allue Salvador, Koldo Gondra Zubieta, Ester Zuza
Summary: This research investigates the possibility of adding value to grinding steel swarf (GSS) and sheet moulding compound (SMC) residues by using them in the manufacture of hot-press compression moulds. The results show that these moulds can effectively produce small batch production runs of SMC, reducing costs, demoulding issues, and energy consumption. Furthermore, the use of GSS and SMC as fillers in the mould manufacturing process results in cost savings and innovative waste recovery.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2022)
Article
Polymer Science
Carlos Bello-Alvarez, Agustin Etxeberria, Yurena Polo, Jose-Ramon Sarasua, Ester Zuza, Aitor Larranaga
Summary: In this study, copolymers of lactide and ethylene brassylate were successfully synthesized for the development of polymeric scaffolds for soft tissue regeneration. These copolymers demonstrated adjustable mechanical properties, thermoplasticity, and cytocompatibility. The addition of nanofillers allowed further modulation of their mechanical properties. Nanostructured scaffolds were fabricated through thermo-pressing, providing geometrical cues for cell adhesion and elongation.
Article
Materials Science, Characterization & Testing
Carlos Bello-Alvarez, Blanca Atxa Ainz, Jone M. Ugartemendia, Laura Sebastian, Agustin Etxeberria, Jose-Ramon Sarasua, Ester Zuza, Aitor Larranaga
Summary: This study explores the impact of surface topography and roughness on biomaterial-cell interaction. By controlling the chain microstructure, the researchers were able to modulate the surface topography of thermoplastic copolymers and observe the influence on cell morphology. These findings open up possibilities for future studies on the influence of surface biophysical properties on more complex cell processes.
Proceedings Paper
Education & Educational Research
Jone M. Ugartemendia, Ainhoa Lejardi, Ester Zuza
INTED2017: 11TH INTERNATIONAL TECHNOLOGY, EDUCATION AND DEVELOPMENT CONFERENCE
(2017)
Proceedings Paper
Education & Educational Research
Ainhoa Lejardi, Ester Zuza, Jone Munoz
EDULEARN16: 8TH INTERNATIONAL CONFERENCE ON EDUCATION AND NEW LEARNING TECHNOLOGIES
(2016)
Proceedings Paper
Education & Educational Research
Jone M. Ugartemendia, Ester Zuza, Ainhoa Lejardi
EDULEARN16: 8TH INTERNATIONAL CONFERENCE ON EDUCATION AND NEW LEARNING TECHNOLOGIES
(2016)