A5019487154- Photopolymerization techniques and applications
- biodegradable polymer synthesis and properties
- Advanced Polymer Synthesis and Characterization
- Synthesis and properties of polymers
- Epoxy Resin Curing Processes
- Silicone and Siloxane Chemistry
- Adhesion, Friction, and Surface Interactions
- Surface Modification and Superhydrophobicity
- Additive Manufacturing and 3D Printing Technologies
- Advanced Sensor and Energy Harvesting Materials
- Polymer composites and self-healing
- Carbon dioxide utilization in catalysis
- Tribology and Wear Analysis
- Nanofabrication and Lithography Techniques
- Chemistry and Chemical Engineering
- Polymer Surface Interaction Studies
- Flame retardant materials and properties
- Photochromic and Fluorescence Chemistry
- Aviation Industry Analysis and Trends
- Metallurgical and Alloy Processes
- Fiber-reinforced polymer composites
- Injection Molding Process and Properties
- Polymer crystallization and properties
- Natural Fiber Reinforced Composites
- Nanocomposite Films for Food Packaging
Seoul National University
2016-2024
Korea Research Institute of Chemical Technology
2020-2023
Government of the Republic of Korea
2020
Eulji University
2006
Upcycling is an eco-friendly method that turns waste into valuable items. Elemental sulfur, a substance produced in large amounts (70 million tons per year), can be converted polymers using inverse vulcanization. However, the traditional had significant limitations, such as limited consumption and weak strength. To address this problem, we newly fabricated sulfur-based pressure-sensitive adhesives (PSAs). PSAs are soft tacky materials should have low modulus, they used extensively (3.1...
Solvent-free acrylic pressure-sensitive adhesives were prepared<italic>via</italic>visible-light driven photocatalytic free radical polymerization. Combined experiments and quantum calculations divulged the origin of enhanced rate polymerisation in presence of<italic>N</italic>-vinyl monomers.
For flexible displays, recovery and relaxation of acrylic pressure-sensitive adhesives (PSA) must be enhanced; however, only a few studies have focused on their optimization. High cross-linking density the PSA leads to improved but deteriorates stress relaxation; thus, it is difficult perform optimization by simply controlling density. Herein, was determined that UV-patterned with both high low densities in single layer enables relaxation. By introducing PSA, elasticity largely deteriorated...
Owing to their excellent properties, such as transparency, resistance oxidation, and high adhesivity, acrylic pressure-sensitive adhesives (PSAs) are widely used. Recently, solvent-free PSAs, which typically prepared via photopolymerization, have attracted increasing attention because of the current strict environmental regulations. UV light is commonly used an excitation source for whereas visible light, safer humans, rarely utilized. In this study, we PSAs light-driven photoredox-mediated...
Large-scale fabrication of neutron-shielding films with flexible or complex shapes is challenging. Uniform and high boron carbide (B4C) filler loads sufficient workability are needed to achieve good neutron-absorption capacity. Here, we show that a two-dimensional (2D) Ti3C2Tx MXene hybrid film homogeneously distributed B4C particles exhibits mechanical flexibility anomalous properties. Layered solution-processable 2D flakes serve as an ideal robust matrix for high-content fillers (60 wt.%)....
Adhesives play a critical role in the assembly of electronic devices, particularly as devices become more diverse form factors. Flexible displays require highly transparent and rapidly recoverable adhesives with certain stiffness. In this study, novel structured are developed that incorporate bicontinuous nanodomains to fabricate flexible low moduli. This structure is obtained via polymerization-induced microphase separation using macro chain transfer agent (CTA). Phase characterized...
Epoxy foam adhesives are widely used for weight reduction, watertight property, and mechanical reinforcement effects. However, epoxy have poor impact resistance at higher expansion ratios. Hence, we prepared an composite adhesive with core–shell rubber (CSR) particles to improve the applied it automotive structural adhesives. The curing behavior pore structure were characterized by differential scanning calorimetry (DSC) X-ray computed tomography (CT), respectively, wedge–peel tests...
In order to overcome the issues of rework and height difference in manufacturing smart devices, UV/UV stepwise curing was conducted on acrylate-based optically clear adhesives.Photo differential scanning calorimetry used confirm results samples that were processed both with without acrylic acid, over a range UV light exposure times for primary process.The at 0.6 J/cm 2 energy acid showed highest amount residual monomers after curing.The observed primary-cured decreased as increased, from 0.9...
Adhesives with excellent adhesion and high elongation at cryogenic temperatures are necessary for fields such as aerospace, transportation, superconductors, medicine, but have difficult requirements. This study aimed to develop a solvent-free, two-component polyurethane (PU) adhesive elongation, especially in ultra-low temperature conditions. we incorporated bulky polydimethylsiloxane (PDMS) diol into the hard segment of PU enhance flexibility improve physical cross-linking within matrix....
In this study, we synthesized a gallol-functionalized PSA and generated micropatterns on its surface to improve underwater adhesion. Compared the adhesive-substrate interactions of benzyl phenol-functionalized PSAs in water, Gallol exhibited greater with substrate. Furthermore, micropattern provided drainage channel for water during bonding process so that is not trapped at substrate-adhesive interface. Moreover, allows formation small uniform adhesion defects, which minimize deterioration...
There are various thin coating technologies, among which the UV technology is attracting attention in next-generation industries. In order to utilize system stably, it necessary analyze and address problems of surface oxygen inhibition penetration, lead irregular curing characteristics. For this, three different UV-curing resins were selected. The effects structural difference material change initiator content along thickness direction during evaluated by sliding cutting technique (which...
The development of sustainable materials has driven significant interest in starch as a renewable and biodegradable polymer. However, the inherent brittleness, hydrophilicity, lack thermoplasticity native limit its application material science. This study addresses limitations by converting it to dialdehyde (DAS) cross-linking with polyether diamines via imine bonds. effects Jeffamine molecular weights (D-2000, D-400, D-230) mole ratios on mechanical, thermal, structural properties...
To evaluate the expressions of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) in thyroid neoplasms a Korean population, we studied total 154 cases: papillary carcinoma classical type (PTC), 86; follicular adenoma (FA), 21; (FC), 35; medullary (MC), 3; undifferentiated (UC), 5; Hurthle cell neoplasm (HN), 4. Using immunohistochemical staining, COX-2 expression was detected 62 (72.1%)PTC specimens, 5 (23.8%)FA 10 (28.6%)FC 0 (0.0%) MC 1 (20.0%)UC specimen, 3 (75%) HN...
UV-responsive pressure-sensitive adhesives (PSAs) were achieved through the ring-opening reactions of N -carbonyl aziridine radicals.