Article
Polymer Science
M. Kohestanian, H. Bouhendi, N. Keshavarzi, M. Mahmoudi, A. Pourjavadi, M. Ghiass
Summary: In this study, poly(acrylic acid) microgels were synthesized using alcohol type cross-linking agents, and the effects of different cross-linkers on properties were investigated. Microgels prepared via novel mechanisms showed higher properties, possibly due to a decrease in the average molecular weight of the polymer network.
Article
Chemistry, Physical
Natalia Shevchenko, Elena Tomsik, Svetlana Laishevkina, Olga Iakobson, Galina Pankova
Summary: Polyelectrolyte microspheres synthesized by inverse emulsion polymerization exhibit high surface charge density and specific surface area, with the surface charge density being significantly higher than other methods. The structure of the surface layer of these microspheres can be comprehensively characterized using potentiometric titration, and their ion-exchange capacity is shown to be superior compared to other types of microspheres.
Article
Chemistry, Physical
Haichao Xu, Baijun Liu, Mingyao Zhang
Summary: This paper investigates the adsorption kinetics of porous microspheres on cationic and anionic dye molecules, demonstrating selective adsorption for cationic dyes due to electrostatic interaction between surfaces charges. The experimental results show an adsorption capacity of 313.125 mg/g after 2 hours, following a pseudo-second-order model for MB dyes.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Liu Yang, Yingxue Wu, Hongyi Shu, Chuang Wang, Changetong Song, Xianhong Zhang, Dong Chen, Yuhong Ma, Wantai Yang
Summary: Polymer-supported catalysts have been the focus of extensive research due to their easy handling, facile separation, and excellent recycling performance. In this study, a simple and efficient strategy was developed to fabricate isocyanate-functionalized polymer microspheres that can serve as a versatile support for photocatalyst immobilization. The resulting supported TiO2 nanoparticles exhibited higher photocatalytic performance, facile separation, and better reusability compared to pristine TiO2.
APPLIED SURFACE SCIENCE
(2023)
Article
Polymer Science
Lee Yae Tan, Nalinthip Chanthaset, Shinsuke Nanto, Ryoichi Soba, Masakazu Nagasawa, Hiroshi Ohno, Hiroharu Ajiro
Summary: By incorporating aromatic pendant and urea moieties, modifications were made to poly(trimethylene carbonate) (PTMC) to improve thermal stability and mechanical properties. The chemically modified PTMC films demonstrated superior characteristics in mechanical performance and thermal properties, showing potential widespread applications at elevated temperatures.
Article
Chemistry, Physical
Yingjie Hu, Christina Cortez-Jugo, Yi Ju, Tian Zheng, Jiajing Zhou, Zhixing Lin, Robert De Rose, Christoph E. Hagemeyer, Karen Alt, Frank Caruso
Summary: This study investigated the impact of nanoparticle cross-linking on liver uptake. The findings indicate that the cross-linking structure of nanoparticle can modulate the targeting ability of antibody nanoparticles in model cell lines and their interaction with phagocytes in human blood. The molecular architecture of PEG can also increase the tumor accumulation of antibody nanoparticles by reducing their uptake in the liver.
CHEMISTRY OF MATERIALS
(2023)
Article
Polymer Science
Alessandra Monaco, Ben Drain, C. Remzi Becer
Summary: This study focuses on employing multi-detector gel permeation chromatography to analyze the structural features of core cross-linked star shaped polymers, and investigates how varying the arm length and core size of the star polymers can influence their structural properties and drug encapsulation capacity.
Article
Chemistry, Physical
Yi-Pei Chuang, Yi-Long Lin, Chih-Chieh Wang, Jin-Long Hong
Summary: The dual cross-linked network cxPAA-PEI(x) composed of PAA and PEI is an efficient binder for silicon anodes in lithium-ion batteries, providing both physical hydrogen bonds and chemical covalent bonds. By adjusting the PEI content, the mechanical properties and adhesive forces of the binders can be tailored, with cxPAA-PEI(3) showing the best performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jincheng Ding, Huiqing Wu, Peiyi Wu
Summary: By utilizing PAA as an active additive, the diffusion of PIP and interfacial polycondensation were controlled, resulting in a high-performance NF membrane with a unique morphology. The NF-PAA/PIP membrane showed a 70% increase in water permeability, high rejection rates, and excellent fouling resistance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Biotechnology & Applied Microbiology
Ning Chen, Baogen Chang, Nian Shi, Wenxing Yan, Fuping Lu, Fufeng Liu
Summary: Enzyme immobilization, specifically through cross-linked enzyme aggregates (CLEAs), is an effective method to improve enzyme reusability and stability. CLEAs offer several advantages, including high catalytic specificity and selectivity, good operational and storage stabilities, and the ability to co-immobilize different enzymes. This technique finds applications in environmental protection, industrial chemistry, food industry, and pharmaceutical synthesis and delivery.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Sahin Demirci, Dawin Khiev, Mehmet Can, Mehtap Sahiner, Manas R. Biswal, Ramesh S. Ayyala, Nurettin Sahiner
Summary: The one-pot synthesis of poly(beta-cyclodextrin) (p(beta-CD)) micro/nanoparticles using different cross-linkers proved to have good physicochemical properties, including biocompatibility, blood compatibility, and sustained drug release capabilities.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Polymer Science
Graham Hayes, Ben Drain, C. Remzi Becer
Summary: Poly(2-oxazoline)s are promising for biomedical applications, but limited synthetic approaches exist for star-shaped polymers. A novel bis-oxazoline cross-linker was developed via a fast thiol click reaction, allowing the preparation of well-controlled core cross-linked star polymers. The synthesized star-shaped polymers were characterized extensively and showed potential for encapsulation of dihydroxyanthroquinone.
Article
Polymer Science
Yi Wu, Bo Liu, Dongmei Cui
Summary: The ultrafast synthesis of core cross-linked star poly(p-methylstyrene) (s-PMS) with syndiotactic arms was achieved through a coupling reaction between the active species of metal-poly(p-methylstyrene) and the cross-linker of divinylbenzene (DVB). By controlling the molecular weight, DVB loading, and coupling time, narrowly distributed s-PMS with high yield was obtained. Compared to linear PMS, s-PMS with the same molecular weight has lower solution viscosity and smaller hydrodynamic radius.
Article
Biophysics
Chayanan Khotchana, Pongsathon Phapugrangkul, Pakorn Opaprakasit, Dolnapa Kaewpa, Preeyaporn Chaiyasat, Amorn Chaiyasat
Summary: A novel method for preparing PLLA particles and capsules without the use of surfactant was proposed in this study. The nearly monodisperse products showed excellent inhibitory effects on microbial growth and were non-toxic to human cells.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Abu Zafar Al Munsur, Bon-Hyuk Goo, Youngkwang Kim, Oh Joong Kwon, Sae Yane Paek, So Young Lee, Hyoung-Juhn Kim, Tae-Hyun Kim
Summary: The semi-IPN membrane NPP-95, composed of Nafion, PAA, and PVA, exhibited excellent thermal, mechanical, and dimensional stability, as well as lower permeability and higher conductivity compared to re-Nafion. The membrane showed significantly improved water management and lower hydrogen crossover under actual fuel cell operating conditions. In both PEMFC and PEMWE applications, NPP-95 demonstrated higher current density and better performance than re-Nafion.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Chujuan Huang, Hideto Minami, Masayoshi Okubo
Summary: By utilizing a two-step temperature process in microsuspension polymerization, the issue of excessive submicrometer-sized byproduct particles during the preparation of micrometer-sized particles in methyl acrylate was overcome, achieving a high conversion rate and meeting industrial demands within a practical timeframe.
Article
Chemistry, Physical
Mohammad Zakaria Sarker, Mohammad Mahbubor Rahman, Hideto Minami, Toyoko Suzuki, Mohammad Kawsar Hossain, Hasan Ahmad
Summary: Stable copper nanoparticles (CuNPs) were successfully prepared using mesoporous amine functionalized silica (NH2-SiO2) particles as a platform, leading to improved catalytic efficiency in the degradation of Congo red and Eriochrome Black-T. The anchored CuNPs demonstrated enhanced stability and increased surface-to-volume ratio, contributing to the overall degradation efficiency of the catalyst nanocomposite particles.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Keigo Oyama, Musashi Seike, Koji Mitamura, Seiji Watase, Toyoko Suzuki, Taro Omura, Hideto Minami, Tomoyasu Hirai, Yoshinobu Nakamura, Syuji Fujii
Summary: Near-infrared light irradiation can transform polypyrrole into nitrogen-containing carbon materials, which can be used to fabricate NCC capsules. PS/PPy particles successfully formed capsules after irradiation, and sunlight can also be used as a light source.
Article
Chemistry, Physical
Mohammad Zakaria Sarker, Mohammad Mahbubor Rahman, Hideto Minami, Toyoko Suzuki, Hasan Ahmad
Summary: Preparation and application of amine functionalized silica (NH2-SiO2)-supported Cu-Ni nanocatalyst is reported, demonstrating superior catalytic activity in the chemical reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with high conversion rate and good recyclability.
COLLOID AND POLYMER SCIENCE
(2022)
Article
Chemistry, Physical
Ken Mukai, Yuki Fujii, Toyoko Suzuki, Hideto Minami
Summary: Elastic/glassy Janus composite particles with snowman-like shape were prepared by polymerization of benzyl methacrylate in the presence of cross-linked silicone particles. These composite particles exhibited two different stiffness properties, combining the elasticity from silicone phase and the hardness from the PBzMA lobe.
COLLOID AND POLYMER SCIENCE
(2022)
Article
Polymer Science
Chujuan Huang, Toyoko Suzuki, Hideto Minami
Summary: The study demonstrated the microsuspension iodine transfer polymerization of vinyl acetate for the first time, investigating the influences of polymerization temperature, dispersant, and iodine species on the properties of the polymer products. Effective control of polymer molecular weight and distribution was achieved in the process.
Article
Chemistry, Multidisciplinary
Katsuhiro Onita, Miku Onishi, Taro Omura, Takeshi Wakiya, Toyoko Suzuki, Hideto Minami
Summary: Monodisperse bio-based polymer particles were prepared through dispersion polymerization. The particle size can be controlled by changing the composition of the reaction medium or PVP concentration. 100% bio-based PMBL particles were also prepared using hydrolyzed PMBL as a colloidal stabilizer.
Article
Chemistry, Multidisciplinary
Musashi Seike, Makoto Uda, Toyoko Suzuki, Hideto Minami, Shinya Higashimoto, Tomoyasu Hirai, Yoshinobu Nakamura, Syuji Fujii
Summary: Solvent-free chemical oxidative polymerizations of pyrrole and its derivatives were successfully conducted by mechanical mixing of monomer and solid oxidant. Polymer grains with unique structures and properties were obtained, and the chloride ion dopant could be removed by dedoping. The dedoped polymer grains exhibited photothermal properties and could work as a stabilizer for liquid marbles.
Article
Chemistry, Physical
Mohammad Zakaria Sarker, Mohammad Mahbubor Rahman, Hideto Minami, Toyoko Suzuki, Mohammad Abdur Rahman, Alam Khan, Sheikh Manjura Hoque, Hasan Ahmad
Summary: In this study, the catalytic activity and recycle stability of bimetallic Cu-Ni nanocatalyst were significantly improved by using a magnetic Fe3O4-SiO2-NH2 composite support. The prepared catalyst exhibited faster reaction rate and good recycle stability in the reduction of 4-nitrophenol.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Multidisciplinary
Ryohei Morimoto, Toyoko Suzuki, Hideto Minami
Summary: Submicron-sized PP/PS composite particles were prepared by seeded emulsion polymerization with a water-soluble cationic initiator. The particles exhibited interesting internal morphology with multilayered structures, and showed superior adhesive performance.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Ryohei Morimoto, Toyoko Suzuki, Hideto Minami
Summary: This study investigates the influence of initiator type on the morphology of PP/PS composite particles. It was found that cationic initiator VA-044 led to the formation of multilayer structures in the composite particles, while the nonionic initiator VA-086 resulted in void structures with a PP shell encapsulating the PS phase. Anionic initiator V-501 led to PS primarily attaching to the outer surfaces of PP particles. These differences were due to electrostatic interaction between the initiator and PP particles of negative zeta potential.
Article
Polymer Science
M. Sagor Ali, M. Mahabur Rahman, Hideto Minami, M. Kawsar Hossain, M. Abdur Rahman, M. Abdul Gafur, Hasan Ahmad
Summary: Combinations of organic conducting polymers and inorganic electromagnetic materials have attracted attention in various fields. In this investigation, polypyrrole (PPy) is decorated with Ni nanoparticles on a functional silica (SiO2) support. The NH2-SiO2/PPy/Ni nanocomposite particles possess good paramagnetic properties. Electrochemical study shows an improvement in specific capacitance of NH2-SiO2/PPy composite compared to PPy, but further decoration with Ni nanoparticles under alkaline condition reduces the capacitance value.
POLYMER INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Chehasan Cheubong, Hirobumi Sunayama, Eri Takano, Yukiya Kitayama, Hideto Minami, Toshifumi Takeuchi
Summary: In this study, molecularly imprinted polymer nanogels with good affinity for immunoglobulin G (IgG) were prepared by modifying a functional monomer with a fluorescent dye. A sandwich detection system for porcine serum albumin (PSA) was developed using these nanogels as a secondary antibody, along with another nanogel capable of recognizing PSA and a natural antibody as the primary antibody. The method showed promising results in detecting pork adulteration in halal beef and lamb meats, with a detection limit comparable to traditional immunoassays.
Article
Polymer Science
Chujuan Huang, Toyoko Suzuki, Hideto Minami
Summary: In this study, micrometer-sized block copolymer particles were successfully synthesized using iodine transfer polymerization as a first attempt. Methyl methacrylate (MMA) and vinyl acetate (VAc) were used as the hydrophilic monomers in a microsuspension system. The resulting poly(methyl methacrylate)-block-poly(vinyl acetate) (PMMA-b-PVAc) particles exhibited the desired molecular weight and relatively narrow molecular weight distribution, despite the low degree of polymerization of the PVAc block. The hydrolysis of these particles resulted in three different morphologies, and the formation mechanism of each morphology was proposed, attributing it to the interaction between the iodic ions generated from the degradation of iodine end groups and the elongated poly(vinyl alcohol) (PVA) segments derived from PVAc.
Article
Chemistry, Multidisciplinary
M. Sagor Ali, M. Mahabur Rahman, M. Kawsar Hossain, Hideto Minami, M. Mahbubor Rahman, S. Manjura Hoque, M. Ashraful Alam, Hasan Ahmad
Summary: In this study, H2N-SiO2/Ni/PPy nanocomposite particles were prepared and the influence of porous functional SiO2 support on the electrochemical performance was analyzed. The formation of coordinated Ni/Ni2+ nanoparticles and a core-shell morphology PPy layer were confirmed. Comparative electrochemical performance demonstrated that the H2N-SiO2/Ni/PPy nanocomposite exhibited the highest specific capacitance and stability.
NEW JOURNAL OF CHEMISTRY
(2022)