Article
Materials Science, Ceramics
Mariele K. Stocker, Murilo L. Sanson, Arthur A. Bernardes, Antonio Marchi Netto, Rodrigo Brambilla
Summary: Silica capsules containing bromothymol blue were synthesized using a modified sol-gel method and applied in milk spoilage detection tests. The KOH/BTB molar ratio impacted the structural characteristics of the capsules, with lower KOH content resulting in faster spoilage kinetics and higher color change intensity in the milk blends.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Akira Miwano, Takehiro Yonezawa, Noriko Yamauchi, Kouichi Nakashima, Yoshio Kobayashi
Summary: The study suggests a new coating technique for thermistors using zirconia, which shows excellent chemical resistance and electrical insulation properties. Pre-silica coating on the substrate can improve the adhesion of ZrO2 films.
Article
Engineering, Chemical
Airi Tago, Noriko Yamauchi, Kouichi Nakashima, Daisuke Nagao, Yoshio Kobayashi
Summary: A simple method has been developed to control the oxidation and aggregation of metallic particles, specifically metallic nickel particles in this study, through silica-coating. The oxidation of metallic particles was successfully controlled by the silica coating, and the Ni/SiO2 particles exhibited soft magnetic behavior at different annealing temperatures.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Yi Huang, Chenyang Zhao, Yue Li, Chen Wang, Tao Shen, Di Cheng, Hui Yang
Summary: This study reported a pH-responsive corrosion inhibitor release system (BTA-ZIF8@SiO2) based on ZIF-8 for self-healing sol-gel anticorrosion coating. A one-step self-assembly procedure was used to create BTA-encapsulated ZIF-8 core, on which a layer of silica was coated to improve compatibility with the sol-gel matrix and enhance overall corrosion protection.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Eugenio Gibertini, Federico Carosio, Kubra Aykanat, Alessandra Accogli, Gabriele Panzeri, Luca Magagnin
Summary: The study proposes a new method of encapsulating red phosphorus particles with a silica shell for flame retardancy in textiles. Through sol-gel process, a uniform silica shell was successfully achieved, improving the thermal stability of red phosphorus.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Chemical
Shoya Kobayashi, Noriko Yamauchi, Shohei Tada, Yoshio Kobayashi
Summary: Silica-coated titanium nitride (TiN/SiO2) particles were synthesized using a sol-gel method and the hardness of the sintered bodies fabricated with these particles was evaluated. The presence of few micropores in the TiN/SiO2 structure resulted in particles with small specific surface areas. The Vickers hardness increased in the order: TiN < TiN-SiO2 < TiN/SiO2A < TiN/SiO2S. The SiO2 shell acted as a sintering aid and the NaOH catalyst improved the density and hardness of the sintered body.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Applied
Alvaro G. Braz, Sandra H. Pulcinelli, Celso Santilli
Summary: This study investigates the use of glycerol as a crosslinker for polyurethane, which is hybridized with a silica network. The results show that this organic-inorganic hybrid coating can effectively enhance the corrosion resistance of metal alloys.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Applied
Alvaro G. Braz, Sandra H. Pulcinelli, Celso V. Santilli
Summary: This study investigates glycerol as a crosslinker for polyurethane segments hybridized with a silica network for protective coatings. Evaluations were made on the structure, thermal stability, and corrosion protection of the coatings at different APTES/4,4'-MDI molar ratios, confirming the suitability of the PU-silica hybrid for anticorrosive thin coatings to protect metal alloys against corrosion.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Ceramics
Sherif Elbasuney, Ibrahim Naeem, Mohamed Mokhtar, Mohamed Sheashea, Mahmoud Zorainy, Gharieb S. El-Sayyad, Mohamed Gobara
Summary: A novel Cr-substituted hydroxyapatite (Cr-HA) nanoparticles were synthesized using continuous hydrothermal technique. The synthesized material was embedded into a silica sol-gel matrix and applied on an AA2024 substrate to evaluate its corrosion inhibition efficiency. The results showed the formation of Cr-HA nanorods with a uniform distribution of Ca and Cr ions within the crystal structure. The Cr-HA sol-gel coating exhibited prolonged pitting resistance and self-healing properties in a corrosive media.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Sergei Galyshev, Evgeniya Postnova, Olga Shakhlevich, Dmitrii Agarkov, Ekaterina Agarkova, Alexey Nekrasov, Rais Mozhchil
Summary: This study focuses on the chemical and phase composition of a carbon fiber coating obtained by the electrochemical sol-gel method. The experimental data from various methods show the coating consists of amorphous silicon oxide and crystalline potassium carbonate, with optimal heat treatment temperature at around 870 degrees C. The study also estimates the loss of fiber strength during the coating process.
Article
Chemistry, Physical
Airi Tago, Masato Yanase, Noriko Yamauchi, Kouichi Nakashima, Daisuke Nagao, Yoshio Kobayashi
Summary: A simple method was developed to suppress the oxidation and aggregation of metallic particles by coating metallic nickel particles with silica shells. The coated particles exhibited controlled oxidation and aggregation behavior, as well as paramagnetic properties after annealing in air.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Analytical
Fei Lu, Ruishu Wright, Ping Lu, Patricia C. Cvetic, Paul R. Ohodnicki
Summary: This study presents fiber optic pH sensors using silica or gold nanoparticle incorporated silica as the sensitive layers. It was found that increasing the coating thickness or incorporating gold nanoparticles can enhance the sensitivity of the sensors. However, the sensors showed poor stability in strong alkaline solutions, leading to potential corrosion issues after testing.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Matjaz Kristl, Irena Ban, Saso Gyergyek, Uros Maver, Janja Stergar
Summary: The use of magnetic nanoparticles in biomedical applications, such as magnetic resonance imaging, drug delivery, and magnetic hyperthermia, is a topic of great interest. Nickel-copper nanoparticles with the formula Ni(x)Cu(1-x) are particularly attractive due to their simple synthesis, high magnetization, biocompatibility, and therapeutic Curie temperature (T-C). Coating the nanoparticles with silica improves their stability, biocompatibility, and allows for further functionalization or drug incorporation. In this study, Ni(67.5)Cu(32.5) nanoparticles were prepared using the sol-gel method and characterized for their potential in magnetic hyperthermia.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Polymer Science
Jiagen Li, Xiaoyi Jian, Yuqing Wang, Zhanqiong Zhong, Xiaohong Fu, Guowei Deng, Zhonghui Li
Summary: A biodegradable silica was developed for tumor microenvironment responsive drug delivery with low drug leakage and good biosafety. The fabrication process and degradation of the drug delivery system were carefully studied. The method reported in this work may offer new insights for high-performance drug delivery systems.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Syarifah Nazirah Wan Ikhsan, Norhaniza Yusof, Farhana Aziz, Ahmad Fauzi Ismail, Norazanita Shamsuddin, Juhana Jaafar, Wan Norharyati Wan Salleh, Pei Sean Goh, Woei Jye Lau, Nurasyikin Misdan
Summary: This study successfully synthesized a functionalized nanocomposite coating with simultaneous hydrophilic and oleophobic properties for improving the efficiency of polymer membranes in separating oil-in-water wastewater. The coating, prepared via sol-gel technique and optimized through various characterizations and Response Surface Modification, exhibited high hydrophilicity and enhanced oleophobicity, with water contact angle of 11 degrees and oil contact angle of 171.3 degrees.
Article
Engineering, Chemical
Yoshio Kobayashi, Hiromu Matsudo, Yohsuke Kubota, Tomohiko Nakagawa, Kohsuke Gonda, Noriaki Ohuchi
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
(2015)
Article
Engineering, Chemical
Takafumi Maeda, Yoshio Kobayashi, Yusuke Yasuda, Toshiaki Morita
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
(2015)
Article
Chemistry, Physical
Daisuke Nagao, Hirobumi Saito, Haruyuki Ishii, Yoshio Kobayashi, Mikio Konno
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2012)
Article
Chemistry, Physical
Yoshio Kobayashi, Toshio Iwasaki, Kensuke Kageyama, Shigeki Ishikuro, Kazuhiko Yamasaki, Takehiro Yonezawa, Ai Takenoshita
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2014)
Article
Chemistry, Physical
Yoshio Kobayashi, Yuya Ishii, Hideyuki Yamane, Ken-ichi Watanabe, Hidekazu Koda, Hiroshi Kunigami, Hideki Kunigami
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2014)
Article
Physics, Applied
Koki Baba, Kenta Iwasawa, Mika Eguchi, Yoshio Kobayashi, Maya Kobori, Mikka Nishitani-Gamo, Toshihiro Ando
JAPANESE JOURNAL OF APPLIED PHYSICS
(2013)
Article
Metallurgy & Metallurgical Engineering
Y. Kobayashi, T. Shirochi, Y. Yasuda, T. Morita
JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY
(2013)
Article
Chemistry, Multidisciplinary
Yoshio Kobayashi, Ryoko Nagasu, Kyosuke Shibuya, Tomohiko Nakagawa, Yohsuke Kubota, Kohsuke Gonda, Noriaki Ohuchi
JOURNAL OF NANOPARTICLE RESEARCH
(2014)
Article
Materials Science, Ceramics
Yoshio Kobayashi, Hiromu Matsudo, Tomohiko Nakagawa, Yohsuke Kubota, Kohsuke Gonda, Noriaki Ohuchi
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2013)
Article
Polymer Science
Satoru Ueda, Mika Eguchi, Yoshio Kobayashi, Yasuyuki Tsutsumi, Ananda Putra, Daisuke Yamaguchi, Satoshi Koizumi
KOBUNSHI RONBUNSHU
(2013)
Article
Materials Science, Multidisciplinary
Y. Kobayashi, H. Inose, R. Nagasu, T. Nakagawa, Y. Kubota, K. Gonda, N. Ohuchi
MATERIALS RESEARCH INNOVATIONS
(2013)
Article
Chemistry, Physical
Yoshio Kobayashi, Tsukasa Shirochi, Takafumi Maeda, Yusuke Yasuda, Toshiaki Morita
SURFACE AND INTERFACE ANALYSIS
(2013)
Article
Microscopy
Satoru Ueda, Yoshio Kobayashi, Satoshi Koizumi, Yasuyuki Tsutsumi
Article
Materials Science, Ceramics
Kazuhiro Inoue, Hidemi Kurebayashi, Masachika Hama, Yoshio Kobayashi, Yusuke Yasuda, Toshiaki Morita
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2013)