Article
Polymer Science
Koichiro Uto, Yoshitaka Matsushita, Mitsuhiro Ebara
Summary: This study designed multiphasic semi-interpenetrating polymer networks (IPNs) with linear poly(epsilon-caprolactone) (PCL) chains that are interpenetrated into the crosslinked PCL network and not involved in crosslinking. The effects of molecular weight and content of linear PCL chains on crystallization and melting were investigated. The results showed that linear PCLs with high molecular weight (M-n = 80k) and content (>23 wt%) formed distinctly separated crystalline phases and underwent two-phase melting and crystallization. These multiphase PCL semi-IPNs demonstrated triple- and two-way shape memory effects, offering new avenues for the synthesis and design of multiphase polymer networks composed of homologous polymers.
Article
Materials Science, Multidisciplinary
Lizhen Hou, Yangyang Gao, Tursunay Yibibulla, Han Huang, Shiliang Wang
Summary: In this study, the Young's modulus of Sb2O3 nanowires with different diameters was measured within the temperature range of 300-650 K. It was found that the Young's modulus decreased linearly with increasing temperature. The temperature coefficient of Young's modulus showed a significant size dependence, with a larger coefficient for larger nanowire diameters. The observed thermomechanical behavior, including sublimation and melting of nanowires at elevated temperatures, provides valuable insights for the design and operation of high-temperature nanodevices using nanowires as building blocks.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Materials Science, Composites
Ali Ghorbankhan, Mohammad Reza Nakhaei, Pedram Safarpour
Summary: Polyamide 6/acrylonitrile butadiene rubber/perlite nanocomposites with different percentages of NBR phase and perlite nanoparticle were prepared and their fracture behavior was studied. The results showed that by controlling input variables, the optimum conditions of the system could be obtained, leading to an improvement in fracture behavior and modulus strength.
POLYMER COMPOSITES
(2022)
Article
Chemistry, Multidisciplinary
Simona Luminita Nica, Mihai Asandulesa, Iuliana Stoica, Cristian-Dragos Varganici, Elena-Laura Ursu, Constantin Gaina, Daniel Timpu, Raluca Marinica Albu
Summary: The article describes the preparation and characterization of high-performance nanocomposite materials based on modified polysulfone and different amounts of modified carbon nanotube fillers. The study shows that the filler amount affects the structure and properties of the nanocomposites, including an increase in glass transition temperature, enhancement of Young's modulus, and significant improvement in electrical conductivity.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Energy & Fuels
Xiaoyu Yao, Tianyi Luo, Tao Yin, Shifeng Lou, Xuan Meng, Naiwang Liu, Li Shi
Summary: The study presents a simple and efficient strategy to exfoliate resource-rich montmorillonite into mono-layered nanosheets, which can be used for removing olefins from aromatics with a high conversion rate.
Article
Materials Science, Paper & Wood
Ali Mohammadpour-Haratbar, Ziba Bouchani, Yasser Zare, Nima Gharib, Kyong Yop Rhee
Summary: In this study, a simple model was used to predict the Young's modulus of composites containing cellulose nanocrystals (CNCs). The model was validated using experimental data and the analysis showed that the interphase and CNC dimensions significantly affected the nanocomposite modulus. Thinner and longer CNCs as well as a thicker and stiffer interphase resulted in higher modulus values for the nanocomposites.
Article
Polymer Science
Maxime Houbben, Clara Pereira Sanchez, Philippe Vanderbemden, Ludovic Noels, Christine Jerome
Summary: Electrically triggered shape memory polymers have been proven efficient and are seen as promising structural materials for high-end applications. Particularly, poly(epsilon-caprolactone) covalent adaptable networks (PCL-CAN) stand out due to their excellent shape memory properties and network reconfiguration, enabling the design of self-actuated devices with complex shapes. This study investigates the preparation of conducting PCL-CAN networks by blending multi-walled carbon nanotubes with four-arm star-shaped PCL. The composite showcases enhanced mechanical properties and excellent shape memory properties, making it suitable for self-folding multi-material design.
Article
Polymer Science
Ana Dora Rodrigues Pontinha, Johanna Maentyneva, Paulo Santos, Luisa Duraes
Summary: This study compares the thermomechanical behavior of different materials under accelerated ageing conditions, including insulation materials using recycled rubber and other comparison materials. Among them, aerogel-based materials showed superinsulation behavior and good flexibility, while extruded polystyrene exhibited permanent deformation under compression. In general, ageing conditions led to a slight increase in thermal conductivity, which disappeared after drying of the samples in an oven, and a decrease in Young's moduli.
Article
Biotechnology & Applied Microbiology
V. H. Antolin-Ceron, D. Gonzalez-Jauregui, P. D. Astudillo-Sanchez, J. Cabrera-Chavarria, H. A. Andrade-Melecio, K. A. Barrera-Rivera, A. Martinez-Richa
Summary: Chitosan-poly(e)caprolactone diol (PCL) blends were studied for food packaging film applications. The addition of functionalized carbon nanotubes in different domains of the blend can reinforce specific domains and create nanocomposites with desirable properties. The interactions between the nanofiller and matrix depend on the nature of the nanofiller and the amount of hydrogen bonding species.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Chong-Yang Cui, Cai-Xia Li, Wen-Wu Liu, Yu-Cheng Liu, Sheng-Tao Niu, Zhi-Qiang Xu, Rong Zou, Wen-Jun Niu, Mao-Cheng Liu, Ming-Jin Liu, Bingni Gu, Kun Zhao, Na Liu, Chun-Jung Lin, You-Zhi Wu, Yu-Lun Chueh
Summary: This study uses choline bromide to modify the perovskite film, reducing defect-state density and residual stress, thereby improving the photovoltaic conversion efficiency and stability of perovskite solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Geosciences, Multidisciplinary
Jianfeng Wang, Yuke Liu, Chao Yang, Wenmin Jiang, Yun Li, Yongqiang Xiong, Ping'an Peng
Summary: This study investigates the relationship between morphological characteristics and mechanical stimuli in the human mesenchymal stem cell (hMSC) constructed biohybrid surfaces of nitrogen and zirconia composites. The results showed that these biohybrid materials have high tolerance to mechanical stimuli and blood flow, which explains why there are various degrees of peripheral mechanical deformation in the in vitro baseline properties of this biological sponge. When mechanical stimuli were applied to the sediment of cultured hMSCs, the trend of pseudobone stimulation became more apparent.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Polymer Science
Srinivasarao Yaragalla, Muhammad Zahid, Jaya Kumar Panda, Nikolaos Tsagarakis, Roberto Cingolani, Athanassia Athanassiou
Summary: A simple and scalable fabrication process of graphene nanoplatelets (GnPs)-reinforced polyether ether ketone (PEEK) filaments with enhanced mechanical and thermal performance was successfully demonstrated. The addition of GnPs to PEEK improved the thermal stability of the polymer matrix, but excessive GnPs content can negatively affect the mechanical performance.
Article
Materials Science, Multidisciplinary
Shahid Iqbal, Sohail Nadeem, Mirza Nadeem Ahmad, Mohsin Javed, Hashem O. Alsaab, Nasser S. Awwad, Hala A. Ibrahium, Eslam B. Elkaeed, Fwzah H. Alshammari, Norah Alwadai, Mohammed Issa Alahmdi, Ali Bahadur, Sadaf ul Hassan, Ayesha Mohyuddin
Summary: Polyorthochloroaniline (POC) nanocomposites with montmorillonite (MMT) clay (POC/MMT) have distinctive properties and wide applications. The preparation of POC/MMT clay nanocomposites was achieved chemically. The influence of MMT clay on the characteristics of POC was investigated, and the results showed improved flame retardancy and thermal stability.
FRONTIERS IN MATERIALS
(2022)
Article
Materials Science, Characterization & Testing
Nora Lukacs, Ferenc Ronkay, Bela Molnar, Botond Marosfoi, Katalin Bocz
Summary: CO2-assisted batch foaming was used to manufacture low-density microcellular foams from recycled PET with flame retardant properties. The foamability was enhanced by reactive chain extender and the flame retardant properties were improved by incorporating aluminium-tris-(diethylphosphinate) flame retardant. Adding natural montmorillonite and polytetrafluoroethylene powder improved the uniformity of cellular size and distribution. The presence of flame retardants inhibited the flame and promoted charring of the foams, resulting in reduced heat release rate and increased charring. The mechanical performance of the foams was primarily determined by the density and strain-induced crystallization increased their thermomechanical resistance.
Article
Acoustics
Yan-Jing Guo, Xiao-Jing Yan, Hai-Xia Zhao, Xiao-Duo Wen, Jing Wang, Yuan-Yuan Du, Nan Wang, Yi Yang
Summary: Ultrasound real-time shear wave elastography has clinical application value in the diagnosis of cervical cancer.
JOURNAL OF ULTRASOUND IN MEDICINE
(2023)
Article
Engineering, Chemical
Fanny Coulon, Nathalie Azema
Article
Construction & Building Technology
Marie Jachiet, Nathalie Azema, Gwenn Le Saout, Eric Garcia-Diaz, Vanessa Kocaba
ADVANCES IN CEMENT RESEARCH
(2018)
Article
Materials Science, Characterization & Testing
Alexandra Siot, Claire Longuet, Romain Leger, Belkacem Otazaghine, Patrick Ienny, Anne-Sophie Caro-Bretelle, Nathalie Azema
Article
Engineering, Chemical
A. Tramaux, N. Azema, G. David, C. Negrell, A. Poulesquen, J. Haas, S. Remond
Article
Engineering, Chemical
A. Tramaux, N. Azema, Y. El Bitouri, G. David, C. Negrell, A. Poulesquen, J. Haas, S. Remond
Article
Engineering, Chemical
A. Tramaux, N. Azema, Y. El Bitouri, G. David, C. Negrell, A. Poulesquen, J. Haas, S. Remond
Article
Chemistry, Physical
Caroline Autier, Nathalie Azema, Pascal Boustingorry
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2014)
Article
Chemistry, Physical
Remy Vie, Anne Johannet, Nathalie Azema
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2014)
Article
Engineering, Environmental
F. -X. Ouf, S. Delcour, N. Azema, A. Coppalle, L. Ferry, F. Gensdarmes, J. -M. Lopez-Cuesta, A. Niang, S. Pontreau, J. Yon
JOURNAL OF HAZARDOUS MATERIALS
(2013)
Article
Polymer Science
N. Cinausero, N. Azema, J-M. Lopez-Cuesta, M. Cochez, M. Ferriol
POLYMER DEGRADATION AND STABILITY
(2011)
Article
Polymer Science
Nicolas Cinausero, Nathalie Azema, Jose-Marie Lopez Cuesta, Marianne Cochez, Michel Ferriol
POLYMERS FOR ADVANCED TECHNOLOGIES
(2011)
Article
Engineering, Chemical
J. Bongono, N. Azema, A. Johannet, P. Gaudon
Article
Engineering, Chemical
Caroline Autier, Nathalie Azema, Jean-Marie Taulemesse, Laurent Clerc
Article
Engineering, Multidisciplinary
A. Siot, R. Leger, C. Longuet, B. Otazaghine, A. S. Caro-Bretelle, N. Azema
COMPOSITES PART B-ENGINEERING
(2019)
Article
Polymer Science
Tetsu Sato, Mariko Takahashi, Takeshi Saito, Masahito Toyonaga, Itsuo Tanuma, Rie Yamada, Satoru Hosoda
Summary: An automatic evaluation system for photooxidation has been developed and successfully applied to assess the photo-OIT of LDPE samples containing photooxidation stabilizers. The system allows independent setting of various measurement conditions and provides detailed information on the photooxidation process.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Zongzheng Zuo, Shuxue Zhou
Summary: In this study, three fluoroalkyl trimethoxysilane (FATMS) additives with different chain lengths were incorporated into a two-component polyurethane clearcoat to improve its hydrophobic durability. The coatings modified with FATMS maintained their surface hydrophobicity under various conditions, but quickly lost it when exposed to both UV irradiation and/or high temperature with water. The results suggest that the FATMS route is more suitable for indoor applications at room temperature.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Song Li, Feng Zhao, Xueya Wang, Zhihua Liu, Jingze Guo, Yutong Li, Shuangmei Tan, Zhenxiang Xin, Shuai Zhao, Lin Li
Summary: Green flame retardants have garnered attention for their environmental friendliness, but current options fall short in achieving high flame retardancy for flammable polymers and maintaining environmental protection. This study takes a two-pronged approach to address flame retardants and the flame-retardant process. An eco-friendly bio-based synergistic flame retardant (PAU), synthesized using phytic acid (PA) and urea (U), is used to create a flame retardant coating that can be directly applied to any surface shape using polydopamine as an adhesive. The resulting EPS-PAU exhibits excellent flame retardancy, smoke suppression, and light weight while only slightly increasing the density.
POLYMER DEGRADATION AND STABILITY
(2024)
