Article
Polymer Science
Mariangela Guastaferro, Lucia Baldino, Ernesto Reverchon, Stefano Cardea
Summary: This study found that agarose cryogels prepared with a fast cooling rate had a more uniform macroporous structure and smaller average pore size, while those prepared with a slower cooling rate exhibited a macroporous and heterogeneous structure. Additionally, supercritical CO2 drying produced agarose-based aerogels with a mesoporous structure and high specific surface area, which were solvent-free and exhibited no thermal changes.
Article
Chemistry, Applied
Alessandro Zambon, Pierantonio Facco, Gianluca Morbiato, Marta Toffoletto, Gabriele Poloniato, Stefania Sut, Pietro Andrigo, Stefano Dall'Acqua, Marina de Bernard, Sara Spilimbergo
Summary: This study investigated the effects of supercritical CO2 drying on strawberries. The results showed that the process conditions significantly affected the weight loss, water activity, and enzymatic inactivation. Under certain conditions, efficient drying and complete enzymatic inactivation can be achieved. Moreover, the dried strawberries maintained their vitamin C, anthocyanin, and flavonoid content, and had a sterilizing effect against foodborne pathogens. Overall, this low temperature drying process has great potential for producing healthy and safe snacks.
Article
Biochemistry & Molecular Biology
Graziana Difonzo, Antonella Aresta, Pietro Cotugno, Roberta Ragni, Giacomo Squeo, Carmine Summo, Federica Massari, Antonella Pasqualone, Michele Faccia, Carlo Zambonin, Francesco Caponio
Summary: Freeze drying more efficiently preserves functional phytocompounds in olive pomace, while hot-air drying does not compromise beta-sitosterol content and squalene extraction. Higher amounts of alpha-tocopherol and polyphenols were extracted from 2P olive pomace, while beta-sitosterol, chlorophylls, and carotenoids were more concentrated in 3P olive pomace.
Article
Chemistry, Physical
Alessandro Zambon, Riccardo Zulli, Francesca Boldrin, Sara Spilimbergo
Summary: The study demonstrates the potential of using supercritical carbon dioxide for drying strawberries and enhancing microbial safety, showing effectiveness against various pathogens.
JOURNAL OF SUPERCRITICAL FLUIDS
(2022)
Review
Chemistry, Multidisciplinary
Wei Liu, Xiaoli Zheng, Qun Xu
Summary: Supercritical CO2 (SC CO2) is a unique fluid with properties of both gas and liquid, and it shows great potential in chemical reactions and material fabrication. Building special nanostructures using SC CO2 has been a focus of research for the past two decades, offering easier and more controlled reaction conditions compared to solvent systems. This review discusses the significance of SC CO2 in fabricating functional materials and explores the effects of SC CO2 on the structure, morphology, and composition of nanostructures. It also outlines optimization strategies and discusses the wide range of applications of these nanostructures in various fields.
Review
Chemistry, Multidisciplinary
Jingwen Zhang, Lin Yang, Honghai Liu
Summary: This study summarizes the process and characteristics of wood processing using supercritical CO2, providing a clean and efficient method for wood processing. The research shows that this method, combining the unique structure and chemical properties of wood with scCO2 technology, yields positive results.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Chemical
Alessandro Zambon, Simeon Bourdoux, Maria F. Pantano, Nicola Maria Pugno, Francesca Boldrin, Gerard Hofland, Andreja Rajkovic, Frank Devlieghere, Sara Spilimbergo
Summary: This study focuses on the feasibility of Supercritical CO2 (Sc-CO2) drying of apple slices, investigating the microbiological stability and mechanical behavior under different process parameters. Results show promising potential for industrial development.
Article
Polymer Science
Jie Zhao, Liqin Cao, Yong Dong
Summary: In this study, a sodium alginate/bentonite composite aerogel with a large specific surface area and pore volume was efficiently prepared through supercritical fluid drying. The adsorption of lysozyme by the composite aerogel reached a maximum capacity of 697 mg/g at pH 8 and initial lysozyme concentrations between 0.2 and 1.2 g/L.
Article
Thermodynamics
Wenkai Xia, Yicen Zhang, Haibin Yu, Zihao Han, Yiping Dai
Summary: This paper presents a systematic approach for designing and optimizing a SCO2 compressor, which results in an improvement of isentropic efficiency through simulations and experimental validations.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Physical
Yannan Zhou, Qun Xu
Summary: Space confined reactions are a viable strategy for achieving important properties in functional materials. Various systems for confinement have been reported, but the focus has primarily been on the concept of space confinement while neglecting the changes in confined space itself. Supercritical CO2 has the potential to reveal structural changes in confined spaces, known as the anti-nanoconfinement effect, which can lead to a series of variations in electronic band and structural transformation.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Vahid Shaayegan, Chongda Wang, Mohammadmehdi Ataei, Franco Costa, Sejin Han, Markus Bussmann, Chul B. Park
Summary: In this study, hierarchical cellular structures were developed in injection molding using supercritical CO2, which can be designed by controlling CO2 content, melt packing, and melt temperature to achieve desired cell size and morphology.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Thermodynamics
Md Uddin, Halim Gurgenci, Zhiqiang Guan, Alex Klimenko, Jun Li, Jishun Li, Lun Li
Summary: Supercritical CO2 turbines face challenges in rotor bearings and seal design due to extreme values of high temperatures, pressures, and rotational speeds. A new turbine configuration with a cooling pillow to control temperatures and provide dynamic support has been introduced, improving dynamic performance by up to 55% and 60% for different turbine sizes. The cooling system has been shown to have higher capacity than required, offering tradeoffs for controlling rotor vibrations.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Bryan X. Medina, Arjun Kohli, Anthony R. Kovscek, Vladimir Alvarado
Summary: Characterizing the pore structures and transport properties of low-permeability shales is critical for evaluating these formations as potential seals or storage sites for geological CO2 sequestration. The study used low-pressure gas adsorption and nuclear magnetic resonance (NMR) techniques to characterize the pore-size distribution of shales before and after injection of supercritical CO2. Results showed that supercritical CO2 injection alters the pore-size distribution for pore sizes <1 nm to 1 mm, providing insights on the evolution of pore structure and mass transport properties during storage of supercritical CO2 in different shale lithologies.
Article
Chemistry, Physical
Kai Ikeda, Yusuke Shimoyama, Yasuhiko Orita
Summary: In this study, a washing and drying strategy using supercritical CO2 (scCO2) was applied to surface-modified nanoparticles. The results showed that scCO2 achieved almost complete washing with a removal efficiency of over 99% for the surface modifier. Additionally, scCO2 drying improved the redispersity of the nanoparticles, leading to the disappearance of the gas-liquid interface.
JOURNAL OF SUPERCRITICAL FLUIDS
(2023)
Article
Food Science & Technology
Mariana Barreto Carvalhal Pinto, Renata Vardanega, Grazielle Nathia-Neves, Pedro Renann Lopes de Franca, Louise Emy Kurozawa, Maria Angela A. Meireles, Flavio Luis Schmidt
Summary: Hop cultivation has been on the rise in Brazil over the past decade, necessitating a greater understanding of how processing affects domestic hop varieties. This study focused on evaluating the impact of drying and supercritical CO2 extraction on hop extract quality. The research optimized the hop processing to improve extract quality while saving energy and reducing the process footprint. Additionally, the study established supercritical CO2 extraction conditions for Brazilian hop extract production, offering a cost-effective alternative for the national beer industry.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Engineering, Biomedical
Tatsuto Kageyama, Lei Yan, Akihiro Shimizu, Shoji Maruo, Junji Fukuda
Article
Materials Science, Multidisciplinary
Daiki Tachibana, Ken Matsubara, Ryosuke Matsuda, Taichi Furukawa, Shoji Maruo, Yoshimi Tanaka, Ohmi Fuchiwaki, Hiroki Ota
ADVANCED MATERIALS TECHNOLOGIES
(2020)
Article
Optics
Takuma Komori, Taichi Furukawa, Motoyuki Iijima, Shoji Maruo
Article
Chemistry, Analytical
Shingo Kozaki, Yukihito Moritoki, Taichi Furukawa, Hikaru Akieda, Tatsuto Kageyama, Junji Fukuda, Shoji Maruo
Article
Nanoscience & Nanotechnology
Takashi Kozaki, Satoshi Saito, Yota Otsuki, Ryosuke Matsuda, Yutaka Isoda, Takuma Endo, Fumika Nakamura, Takuto Araki, Taichi Furukawa, Shoji Maruo, Masayoshi Watanabe, Kazuhide Ueno, Hiroki Ota
ADVANCED ELECTRONIC MATERIALS
(2020)
Article
Optics
Yoko Fujishiro, Taichi Furukawa, Shoji Maruo
Article
Materials Science, Multidisciplinary
Taiki Maruyama, Hotaka Hirata, Taichi Furukawa, Shoji Maruo
OPTICAL MATERIALS EXPRESS
(2020)
Article
Engineering, Chemical
Seitaro Morita, Motoyuki Iijima, Yuanyi Chen, Taichi Furukawa, Junichi Tatami, Shoji Maruo
Summary: In this study, optical fiber-based stereolithography of alumina ceramics was demonstrated using concentrated slurry with low monomer content for rapid firing of printed green objects. The effects of processing parameters on photocuring properties were systematically investigated, and it was found that reactive amine sites in PEI-OA and MA volume concentrations were the most dominant factors for improving photocuring properties. Thus, a slurry composed of larger alumina particles and lower OA content in PEI-OA was more favorable for achieving photocuring under reduced MA content.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yuanyi Chen, Taichi Furukawa, Taichi Ibi, Yohei Noda, Shoji Maruo
Summary: In this study, ceramic lattice microstructures were successfully fabricated using optical fibers to irradiate a photocurable ceramic slurry via micro-stereolithography. By optimizing fabrication conditions, the desired microstructures were achieved. The proposed simple and compact fabrication system can be used to produce 3D microparts from various ceramics for electronics, mechanics, optics, and medical applications.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Chemistry, Analytical
Yukihito Moritoki, Taichi Furukawa, Jinyi Sun, Minoru Yokoyama, Tomoyuki Shimono, Takayuki Yamada, Shinji Nishiwaki, Tatsuto Kageyama, Junji Fukuda, Masaru Mukai, Shoji Maruo
Summary: This study presents the development of micro-tweezers using topology optimization and microstereolithography, demonstrating its capability to manipulate organoids with a diameter of approximately 360 μm. The results indicate that the deformation of the topology-optimized micro-tweezers is proportional to the applied load, suggesting the potential for enhancing tools for handling various biological samples.
Article
Engineering, Biomedical
Tatsuto Kageyama, Hikaru Akieda, Yukie Sonoyama, Ken Sato, Hiroshi Yoshikawa, Hitoshi Isono, Makoto Hirota, Hiroaki Kitajima, Yang-Sook Chun, Shoji Maruo, Junji Fukuda
Summary: This study proposes a hydrogel microbead-based approach for preparing vascularized and high-density tissue grafts, demonstrating the significant effects of endothelialization on in vivo bone regeneration. The spontaneous constriction of mesenchymal stem cell-encapsulated collagen microgels improves the density and osteogenic differentiation of the cells, enhancing the efficacy of engraftment and bone regeneration.
ACTA BIOMATERIALIA
(2023)
Article
Polymer Science
Mai Takenouchi, Masaru Mukai, Taichi Furukawa, Shoji Maruo
Summary: In this study, highly conductive three-dimensional wiring was successfully fabricated using a precise 3D printing method. The importance of doping agents in the post-fabrication process was discussed. Flexible wiring was demonstrated by modeling the wiring on a polyimide film with surface treatment and creating a three-dimensional object.
Article
Biotechnology & Applied Microbiology
Mio Aoki, Ryoto Yokota, Shoji Maruo, Tatsuto Kageyama, Junji Fukuda
Summary: This study investigated the efficacy of slow vitrification methods for freezing hair follicle germs (HFGs) and proposed a microfinger device to scale up the cryopreservation process. The results showed that DMSO vitrification yielded efficient hair regeneration, comparable to non-cryoprotected HFGs, and the microfinger device achieved over 50% hair regeneration rate for cryopreserved HFGs.
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Ryoya Arita, Motoyuki Iijima, Yoko Fujishiro, Seitaro Morita, Taichi Furukawa, Junichi Tatami, Shoji Maruo
COMMUNICATIONS MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Masahiko Sairaiji, Hiroshi Yoshizaki, Hideaki Iwaoka, Shoichi Hirosawa, Shoji Maruo
JOURNAL OF LASER MICRO NANOENGINEERING
(2020)
