Guo Xingkui

National University of Singapore | NUS · Department of Mechanical Engineering

Here, we demonstrate a rapidly responsive colorimetric hydrogen detector based on Pd/MoO3 nanocomposites for hydrogen leakage monitoring at room temperature. The Mo⁵⁺-rich MoO3 nanobelts are synthesized via a simple one-step hydrothermal method by adding NaCl as the mineralizer. The structure of the detector is fabricated by a general spray deposit...

The development of next‐generation touch panels requires sensors that are highly sensitive, biocompatible, transparent, stretchable, self‐healing, and even anti‐freezing and self‐powered because the traditional touch panel based on stiff and brittle electrodes faces many challenges. Conductive hydrogels hold great promise as sensing materials for t...

A novel separation‐free poly(N,N′-dimethylacrylamide)-titanium dioxide/copper sulfide (PDMAA-TiO2/CuS) hydrogel photocatalyst with the synergistic effect of adsorption and photocatalysis has been successfully developed by a facile two-step method involving a homogeneous polymerization...

The low bonding strength between the thermoplastic liners and the metal bosses can easily lead to hydrogen leakage, which is one of the most important challenges for the development of type IV hydrogen storage tanks. Herein, a method incorporating graphene flakes (GFs) into polymer matrix was applied to enhance the adhesion between polyethylene (PE...

Development of ultra‐stretchable and sensitive soft touch panel is of great importance for broad applications in artificial intelligence, wearable devices, and soft robotics. However, traditional human‐computer interfaces (HCIs) suffer from the discomfort and asynchronous signals in current application scenarios. Herein, a hydrogel‐based self‐heali...

As the increasing importance of human-machine interactions, stretchability, biocompatibility and self-healing behavior will play a more significant role in the next-generation touch panels so as to allow integration with a...

Aminated cassava residue magnetic microspheres (ACRPM) were synthesized via an inverse emulsion method by using chemically modified cassava residue as a crude material, and acrylic acid (AA), acrylamide (AM), and methyl methacrylate (MMA) as monomers and a polyethylene glycol/methanol system (PEG/MeOH) as the porogen. Fourier-transform infrared spe...

Polymer/inorganic nanocomposites exhibit special properties due to highly intimate interactions between organic and inorganic phases and thus have been deployed for various applications. Among them, nanocomposites with monolayer polymer coverage on the inorganic surface demonstrate the most efficiency for applications. However, the controllable syn...

In nature, the water-repellent surface of superhydrophobic material such as lotus has the micro/nano hierarchical structure, while shish-kebab, which is one of the most fascinating superstructure crystals in polymer science, also exhibits micro/nano hierarchical structure. Accordingly, it remains an idea of whether this structure can be used as the...

The effects of phosphazene based epoxy resin hexa-[4-(glycidyloxycarbonyl) phenoxy]cyclotriphosphazene (CTP-EP) as a synergistic agent on fire retardancy, thermal and mechanical properties of polyamide 6/aluminum diethylphosphinate (PA6/AlPi) composites were investigated. AlPi and CTP-EP presented an obviously synergistic flame retardant effect for...

In this study, two poly(acrylic acid)/alumina (PAA/alumina) nanocomposites with varied polymer loadings were prepared via in situ polymerization of preadsorbed acrylic acid. One composite would have a ~1/4‐monolayer polymer coverage, while the other had a ~2‐monolayer coverage. The produced composite materials were characterized in the adsorptive b...

Novel waterborne acrylic resin modified with glycidyl methacrylate (GMA) was successfully synthesized via homogeneous solution polymerization in isopropyl alcohol followed by solvent exchange with water. Aminopropyltriethoxysilane (KH-550), a silane coupling agent that can crosslink with resin and iron base material, was used as curing agent for so...

Oil/water separation becomes a research hotspot because of the frequent oil spill accidents. Although lots of separating membranes with super-wettability have been fabricated to separate oil or water from the mixtures, to separate both heavy (ρoil > ρwater) and light (ρoil < ρwater) oil/water mixtures with high efficiency and high flux is still a c...

In this paper, a series of amorphous polynorbornene cells were constructed, and the microstructures of the membranes and the transports of OH- in the membranes were optimized at different temperatures and water contents. The relationships between the microstructure of polynorbornenes and the transport of hydroxide ions were investigated by molecula...

A novel two-layer reinforced carbon fiber (CF), i.e., Ag nanoparticles (Ag NPs)/graphene oxide (GO) reinforced CF (named as CF/Ag/GO) was prepared by an electrochemical deposition and electrophoretic deposition (EPD) consequently. The modified fiber showed an increased interfacial shear strength (IFSS) and tensile strength. Transmission electron mi...

Mesoporous alumina, as a porous, high specific surface area, high activity, and heat stable material, has been widely used as an industrial adsorbent, catalyst, and catalyst support. The modification of alumina with organic polymers has been widely investigated in recent years. In this study, we compared the dependence of the adsorption of a polyel...

Lignin grafted N, N′-methylene-bisacrylamide (LM) was copolymerized with acrylic acid (AA) to fabricate lignin based poly (acrylic acid) (LBPAA) nanocomposites, and organo-montmorillonite (OrgMMT) was uniformly dispersed in LBPAA by ultrasonic method. The water absorbency in KCl solution was 302.9 g/g for LBPAA/OrgMMT (3 wt% OrgMMT, 43.65 wt% LM, a...

The recently explored FeNb11O29 is an advanced anode material for lithium-ion batteries due to its high specific capacity and safety. However, it suffers from its poor rate capability. To tackle this issue, a crystal-structure modification is employed. Defective FeNb11O29 (FeNb11O27.9) is fabricated using a one-step solid-state reaction method in N...

Despite the exotic electromagnetic properties have been demonstrated in metamaterials to date, how to effectively adjust negative electromagnetic parameters remains a challenge. Tunable negative permittivity is essential for the metamaterials to satisfy a variety of practical applications, such as capacitor, microwave absorbing and shielding. Here,...

Toluene, as a strong carcinogen, is widely found in the newly renovated rooms, shopping malls, and workshops. Photocatalytic oxidation has great superiority and application prospects for the degradation of toluene. However, low photocatalytic efficiency under visible-light irradiation arising from easy agglomeration of the solid catalysts hinders t...

A porphyrin derivative, 5-(4-carboxylphenyl)-10,15,20-tris(4-chlorophenyl) porphyrin (PorCOOH), was synthesized and self-assembled as a monolayer thin solid film on the modified surface of a quartz substrate by an ester bond between –COOH groups of PorCOOH molecules and –OH groups of the hydrophilic pretreated SiO2 surface. An analysis of the spect...