A5100612908- Polymer composites and self-healing
- Advanced Polymer Synthesis and Characterization
- Advanced Sensor and Energy Harvesting Materials
- biodegradable polymer synthesis and properties
- Supramolecular Self-Assembly in Materials
- Hydrogels: synthesis, properties, applications
- Conducting polymers and applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Materials and Mechanics
- Supercapacitor Materials and Fabrication
- Recycling and Waste Management Techniques
- Advanced biosensing and bioanalysis techniques
- Microplastics and Plastic Pollution
- Polydiacetylene-based materials and applications
- Advanced Cellulose Research Studies
- Electrospun Nanofibers in Biomedical Applications
- Nanoparticles: synthesis and applications
- Photochromic and Fluorescence Chemistry
- Skin and Cellular Biology Research
- Polymer Nanocomposites and Properties
- Advanced battery technologies research
- Synthetic Organic Chemistry Methods
- Polymer Surface Interaction Studies
- Biosensors and Analytical Detection
- Silicone and Siloxane Chemistry
Osaka University
2019-2024
National Institute of Animal Science
2023
Pusan National University
2021
Korea University
2018
Korea Institute of Science and Technology
2018
Seoul National University
2009-2013
Kwangwoon University
2008-2009
Yonsei University
2003-2004
Hongik University
1996
Abstract Self-healing materials have attracted attention due to their ability regain structure and function after damage. In recent years, significant progress has been made in achieving various functions through supramolecular chemistry. This review describes an overview of the strategies used prepare self-healing self-restoring utilizing reversible movable crosslinks. Reversible crosslinks, consisting noncovalent bonds, can reversibly undergo repeated cleavage reformation. Therefore, be...
We prepared acrylamide monomers with permethylated cyclodextrins (PM-CDAAmMe) or peracetylated (PAc-CDAAmMe). PM-CDAAmMe and PAc-CDAAmMe are soluble in various hydrophobic liquid acrylate monomers, they can form inclusion complexes guest such as adamantane fluoroalkyl groups tethered to a vinyl residue. The bulk polymerization of the gave highly flexible tough elastomers. Tensile tests on obtained supramolecular elastomers showed fracture strains over 800% energies that were 12 times larger...
Abstract The host–guest interaction as noncovalent bonds can make polymeric materials tough and flexible based on the reversibility property, which is a promising approach to extend lifetime of materials. Supramolecular with cyclodextrin adamantane are prepared by mixing host polymers guest planetary ball milling. toughness supramolecular milling approximately 2 5 times higher than that casting, conventional method. maintain their mechanical properties during repeated treatments. They also...
Water plays important roles in various functions on the surface of polymers and peptides. In this work, host–guest hydrogels with different weight percentages water were prepared via copolymerization an acrylamide-modified cyclodextrin host monomer, adamantane guest acrylamide. The showed high toughness readhesion properties, which reversible cross-linking between poly(acrylamide) chains is important. mechanical properties depend their contents. maximum strength at also varied depending type...
In this study, we designed a methacrylate molecule with an alkyl-substituted trichloro salicylic acid pendant as transformable bulky monomer to enable the synthesis of alternating copolymer methyl (MMA) and n-butyl acrylate (nBA). The adamantyl-substituted (1-Ad) showed very low homopolymerization propensity in radical polymerizations, but afforded nBA via copolymerization. 1-Ad units resultant were quantitatively selectively transformed into MMA transesterification methanol yield nBA. Its...
A technological foundation for transparent and ultra-bendable supercapacitors without percolation effects depth limitations is introduced, with demonstrated examples in in- out-of-plain ultra-deformation states. This prototype system, built on large-scale interdigitated pattern type electrodes, constitutes significant advances over existing energy systems optoelectronic terms of electrochemical performance (capacitance ∼405 F g−1) flexibility (bending radius ∼1.5 mm).
Colloidal silver nanoparticles (AgNPs) have been commercialized as the typically stabilized form via addition of a variety surfactants or polymers. Herein, to examine effects stabilizing AgNPs in suspension, we modified surface bare with four type (NaDDBS, SDS, TW80, CTAB) and polymers (PVP, PAA, PAH, CMC). The was applied compare suspension stability nanotoxicity test using Escherichia coli (E. coli) model organism. Modification chemical stabilizer may be not related molecular weight, but...
Highly flexible and tough elastomers were obtained from the bulk copolymerization of a peracetylated cyclodextrin (CD) monomer small alkyl acrylate main chain monomers without guest monomer. The chains penetrated cavity CD units, units on polymer acted as movable cross-linking points in elastomer. In contrast, using bulky with side groups gave linear polymers. cannot serve points. Introducing into poly(ethyl acrylate) resulted higher fracture energy comparable to that conventional rubbers...
Abstract This work demonstrates flexible, transparent phototransistors that can detect visible light with nontoxic organic active materials on biodegradable substrates toward environment‐friendly electronics. The molybdenum trioxide (MoO 3 )‐buffered indium zinc oxide as high‐performance hole injector and electrodes is applied for the first time to cellulose nanofibrillated fiber achieve more than 70% of transmittance in range (400–750 nm) while showing high conductivity under multiple...
Reversible or movable cross-links based on host-guest interactions in supramolecular materials create functions such as enhanced mechanical properties and stimulus responsiveness. A complex a polymer side chain achieves the described reversible cross-link. Generally, 1:1 is utilized cross-link for interaction based-supramolecular materials, but herein, 1:2 between γ-cyclodextrin (γCD) methyl viologen terminated undecyl acrylate (VC11) was chosen to three polymeric chains. The obtained...
We report large-scale interdigitated supercapacitor chips based on pseudo-capacitive metal oxide electrodes. A novel method is presented, which provides a powerful fabrication technology of supercapacitors operated by reaction. Also, we empirically develop an equation that describes the relationship between capacitance, mass, and sweep rate in actual system.
Abstract Bulk copolymerization of alkyl acrylates and cyclodextrin (CD) host monomers produced a single movable cross-network (SC). The CD units acted as crosslinking points in the obtained SC elastomer. Introducing crosslinks into poly(ethyl acrylate/butyl acrylate) copolymer resulted good toughness ( G f ) stress dispersion. Here, to improve Young’s modulus E elastomers, bulk liquid acrylate monomer swelling gave another type elastomer with penetrating polymers (SCPs). Moreover, presence...
Practical applications like very thin stress-strain sensors require high strength, stretchability, and conductivity, simultaneously. One of the approaches is improving toughness sensing materials. Polymeric materials with movable cross-links in which polymer chain penetrates cavity cyclodextrin (CD) demonstrate enhanced strength We designed two that utilize elastomer nanocomposites carbon filler (ketjenblack, KB). approach mixing SC (a single cross-network material), a linear (poly(ethyl...
Polyurethane (PU) materials with movable crosslinking were prepared by a typical two-step synthetic process using an acetylated γ-cyclodextrin (TAcγCD) diol compound. The soft segment of PU is polytetrahydrofuran (PTHF), and the hard consists hexamethylene diisocyanate (HDI) 1,3-propylene glycol (POD). synthesized exhibited mechanical characteristics network, presence hydrogen bonds from urethane resulted in synergistic effect. Two kinds noncovalent bond increased Young's modulus material...
Movable cross-network elastomer with knitting polymers (KP elastomer) were obtained by bulk polymerization of main chain monomers in presence host polymer. The two design strategies successfully improve the toughness and stiffness KP elastomers.
Incorporating appropriate amount of movable cross-links in poly(dimethyl siloxane) (PDMS) resulted simultanous improvement Young's modulus and toughness.
Abstract Light‐driven actuators are widely used for smart devices such as soft robots. One of the main challenges is achieving rapid responsiveness, in addition to ensuring favorable mechanical properties. Herein, we focused on photoresponsive polyurethane (CD‐Azo‐PU) based controlling crystallization hard segments (PU) by complexation between azobenzene (Azo) and cyclodextrins (CDs). CD‐Azo‐PU incorporated chain a 1:2 inclusion complex Azo γCD movable crosslink point. Upon ultraviolet light...
Improvement in the elasticity and toughness of polymeric materials is an important issue fabrication materials. However, solving this challenging because trade-off between elasticity. Herein, citric acid-modified cellulose (CAC) was introduced as a filler into movable cross-linked materials, which cyclic molecules move along polymer chain. The resulting CAC/polymer composite contained both reversible cross-links. cross-links were hydrogen bonds formed carboxyl group acrylic acid units (AA;...
A brain coral-like supercapacitor electrode containing 3D carbon and metal bicontinuous structures was synthesized by a simple method using agarose gel. This bulk can supply excellent power with ultrahigh-rate capability (∼1000 V s−1).
To achieve a carbon circulation society, petroleum-derived resources must be replaced with cellulose and other bioderived resources. Although serving as filler enhances the mechanical properties of polymeric materials upon mixing, it remains challenge to increase contents fillers while maintaining enhanced properties. Regarding properties, polymer composites containing can usually improved by adding small percentage fillers. Unfortunately, mixing large amounts creates brittle composites....
The surface plasmon resonance (SPR)-based sensor technique is based on the utilization of a noble metal to generate electromagnetic field, which then used probe changes in optical properties. Using nanoplates, it possible considerably enhance sensitivity conventional SPR device. In this work, we investigated effect shape silver nanoplates (AgNPs) enhancement sensitivity. By use bovine serum albumin (BSA) has reversible pH-driven conformational change property, signal amplification various...