J. Justin Koh

ORCID: 0000-0001-5889-288X
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Advanced Sensor and Energy Harvesting Materials
  • biodegradable polymer synthesis and properties
  • Additive Manufacturing and 3D Printing Technologies
  • Supercapacitor Materials and Fabrication
  • Surface Modification and Superhydrophobicity
  • Solar-Powered Water Purification Methods
  • Advancements in Battery Materials
  • Solar Thermal and Photovoltaic Systems
  • Electrospun Nanofibers in Biomedical Applications
  • Conducting polymers and applications
  • Advanced Battery Materials and Technologies
  • Electrohydrodynamics and Fluid Dynamics
  • Microplastics and Plastic Pollution
  • Pickering emulsions and particle stabilization
  • Polymer composites and self-healing
  • Advanced Materials and Mechanics
  • Advanced battery technologies research
  • Membrane Separation Technologies
  • Thermoregulation and physiological responses
  • Silicone and Siloxane Chemistry
  • Fuel Cells and Related Materials
  • Polymer crystallization and properties
  • Carbon dioxide utilization in catalysis
  • Micro and Nano Robotics
  • Tactile and Sensory Interactions

Agency for Science, Technology and Research
2017-2025

Institute of Materials Research and Engineering
2022-2025

National University of Singapore
2016-2024

Singapore Institute of Manufacturing Technology
2017-2021

A fluidic photothermal structure is demonstrated for completely salt-rejecting solar water extraction and simultaneous brine-drenching induced energy generation.

10.1039/d0ee01572e article EN Energy & Environmental Science 2020-01-01

Abstract The integration of solar‐driven interfacial evaporation and electricity co‐generation is considered a promising approach to simultaneously alleviate freshwater scarcity the energy crisis. However, affected by intermittent solar irradiation/uncontrollable weather, overall performance in real world greatly reduced. Herein, inspired antifreeze proteins beetles that survive extreme climates, all‐weather evaporators with sandwich structure are designed. top bottom layers composed MnO 2...

10.1002/aenm.202302451 article EN Advanced Energy Materials 2023-10-16

The interactions between moisture and materials give rise to the possibility of moisture-driven energy generation (MEG). Current MEG devices only establish this interaction during water sorption in specific configurations, conversion is eventually ceased by saturated uptake. This paper reports an asymmetric hygroscopic structure (AHS) that simultaneously achieves harvesting storage from absorption. AHS constructed deposition a ionic hydrogel over layer functionalized carbon. Water absorbed...

10.1002/adma.202201228 article EN Advanced Materials 2022-03-26

The ability of additive manufacturing to print mesh structure was exploited fabricate highly efficient filtration meshes for oil/water separation applications. Through Direct Ink Writing (DIW) technique, pure cellulose acetate with a architecture can be created easily, using acetate/ethyl solution as the ink and simply drying off solvent in ambient conditions. Besides conventional structures, more complex structures fabricated order manipulate pore size hence tune properties mesh....

10.1021/acsami.9b01753 article EN ACS Applied Materials & Interfaces 2019-03-18

Metal–organic frameworks (MOFs) are usually synthesized in powder form. For many practical applications, MOFs need to be shaped into monoliths that can easily handled. However, conventional shaping methods, such as pelletization, often result a decrease functionality. Recently, MOF-containing have been made using direct ink writing (DIW; extrusion 3D printing), but date, high additive loadings required. In this work, we demonstrate colloidal gels containing only ethanol and Cu3(BTC)2 (BTC =...

10.1021/acsmaterialslett.9b00069 article EN ACS Materials Letters 2019-05-29

Abstract The future of green electronics possessing great strength and toughness proves to be a promising area research in this technologically advanced society. This work develops the first fully bendable malleable toughened polylactic acid (PLA) composite by incorporating multifunctional polyhydroxybutyrate rubber copolymer filler that acts as an effective nucleating agent accelerate PLA crystallization performs dynamic plasticizer generate massive polymer chain movement. resultant...

10.1002/adfm.202001565 article EN Advanced Functional Materials 2020-06-02

Abstract Polydimethylsiloxane (PDMS) has been widely used in flexible electronics, soft robotics, and bioelectronics. However, the fabrication of PDMS‐based devices mostly relied on conventional approaches, such as casting molding, thereby limiting their potential. Here we fabricate composites with programmable microstructures by direct ink writing realize practical functionalities four‐dimensional (4D) printing. The mechanical, thermomechanical magnetic properties three‐dimensional‐printed...

10.1002/idm2.12027 article EN Interdisciplinary materials 2022-07-05

Abstract Modern human societies are highly dependent on plastic materials, however, the bulk of them non‐renewable commodity plastics that cause pollution problems and consume large amounts energy for their thermal processing activities. In this article, a sustainable cellulose hydroplastic material its composites, can be shaped repeatedly into various 2D/3D geometries using just water introduced. wet state, high flexibility ductility make it conducive shaping to take place. ambient...

10.1002/advs.202402390 article EN cc-by Advanced Science 2024-05-27

Abstract Aqueous zinc (Zn)‐based structural batteries capable of both electrochemical energy storage and mechanical load‐bearing capabilities are attractive for next‐generation future electric vehicles due to their eco‐friendliness, non‐toxic, safe nature. However, parasitic free water activities plague aqueous Zn‐based batteries, detrimental the performance longevity cell. Developing polymer gel electrolytes is a notable potential solution, but they usually have poor electrode interfacial...

10.1002/adfm.202313531 article EN Advanced Functional Materials 2024-02-06

A novel robust and self-standing 3D-printed pure copper framework (3DP-Cu) is developed as a Li host current collector. 3D-printing allows microchannels to be deliberately incorporated, benefiting both mechanical electrochemical performances.

10.1039/d0ta00209g article EN Journal of Materials Chemistry A 2020-01-01

Poly(dimethylsiloxane) (PDMS) as one of the electron-drawing materials has been widely used in triboelectric nanogenerators (TENG), which is expected to generate electron through friction and required endure dynamic loads. However, nature siloxane bond low interchain interaction between methyl side groups result fracture energy PDMS elastomers. Here, a strategy that combined advantages hierarchical hydrogen bonding phase-separation-like structure was adopted improve toughness By varying both...

10.1021/acsami.0c08213 article EN ACS Applied Materials & Interfaces 2020-06-15

Bottom-up design of 3D evaporator with high water evaporation rate shows excellent salt-rejection ability for effective and perpetual solar desalination system.

10.1039/d2ta03452b article EN cc-by-nc Journal of Materials Chemistry A 2022-01-01

Biomimetic structures involve design and fabrication to mimic the natural world, taking inspiration from unique shapes, patterns, functions of biological organisms. This approach has proven be highly effective in building new functional efficient for many applications. While it is often challenging fabricate some complex biomimetic structures, development 3D printing technologies recent years made more feasible, being a powerful tool fabricating with high precision accuracy, at much reduced...

10.1016/j.decarb.2023.100026 article EN cc-by-nc-nd DeCarbon 2023-10-30

Polymer blends with synergetic performance play an integral part in modern society. The discovery of compatible polymer systems often relies on strong chemical interactions. By contrast, the role entropy polymers is neglected. In this work, we show that effect could control phase structure and mechanical behaviors blends. For weakly interacting pairs, seemingly small mixing favors formation nanoscale cocontinuous structures. abundant nanointerfaces initiate large plastic deformations by...

10.1021/acsmacrolett.0c00844 article EN ACS Macro Letters 2021-03-12

Abstract Donning of personal protective equipment (PPE) in the healthcare sector has been intensified by on‐going COVID‐19 pandemic around globe. While extensive PPE provides protection, it typically limits moisture permeability and severely hinders sweat evaporation process, resulting greater heat stress on personnel. Herein, a zinc‐poly(vinyl alcohol) (Zn‐PVA) composite film is fabricated embedding super‐hygroscopic zinc‐ethanolamine complex (Zn‐complex) PVA matrix. By attaching Zn‐PVA...

10.1002/smll.202107636 article EN Small 2022-02-20

Abstract Aqueous zinc (Zn)‐based structural batteries, combining electrochemical energy storage with mechanical load‐bearing capabilities, are promising for next‐generation electric vehicle due to their eco‐friendly and safe nature. However, challenges such as dendrite formation, anode corrosion, parasitic reactions limits practical application. Polymer electrolytes, particularly hydrogels, can mitigate these limitations, but typically possess poor properties that jeopardizes robustness....

10.1002/adfm.202423149 article EN Advanced Functional Materials 2025-03-07
Coming Soon ...