John H Xin

John H Xin
The Hong Kong Polytechnic University | PolyU · Institute of Textiles and Clothing

Professor

About

262
Publications
48,837
Reads
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10,713
Citations
Introduction
John H Xin currently works at the Institute of Textiles and Clothing, The Hong Kong Polytechnic University. John does research in Materials Chemistry, Polymer Chemistry and Surface Chemistry. Their most recent publication is 'Fully Controllable Design and Fabrication of Three-Dimensional Lattice Supercapacitors'.

Publications

Publications (262)
Preprint
Robust, hydrophobic woven cotton fabrics was obtained through the sol-gel dip coating of different nanoparticle architectures; silica and silica-ZnO. For water repellency, average values as high as ~148° and relatively low tilt angles for fibrous fabrics (~12°) were observed. In all cases, this enhanced functionality was achieved with the simultane...
Article
Full-text available
Printed fabrics often have rich colors and variable patterns in different sizes and shapes, which makes it difficult to achieve accurate pattern recognition and color measurement using traditional spectrophotometers and digital cameras. This paper develops a grid-based density peaks clustering (GDPC) algorithm to automatically recognize patterns an...
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Abstract. The inherently poor flame retardancy and comparatively low tensile strength of poly(lactic acid) (PLA) have limited its wide adoption as alternative ‘green’ engineering plastic in many fields. This manuscript reports the synthesis of a new phosphorus flame retardant – phenylphosphonic 3(2-aminobenzothiazole) (P-TAB) and its combination wi...
Article
Supercapacitors have been proven to be a superior candidate for energy storage systems. Yet, most of them are approximately two-dimensional structure, without taking full advantage of the spatial superiority to load more mass of active materials. Moreover, three-dimensional (3D) sponge electrodes may hinder ion transmission due to the significant v...
Article
With the increasing awareness of sustainability development and public health in the modern society, environmentally-friendly coloration process draws tremendous attention in the textile industry. Toxic heavy metal mordants are forbidden to be used in the application of natural colorants in the coloration process. In this study, an environmentallyf...
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In this study, the inclusion of graphene oxide in silica photonic crystals was found to affect optical reflectance intensity and reflectance peak broadening. The quantitative relationship between weight percentage and the reflected light intensity and corresponding wavelength shift of light GO-decorated photonic crystals was studied, providing a us...
Article
Chemical fusion: The cover image depicts the formation of Zn‐Fe‐O hybrid carbon nanowires by chemical fusion. Zinc acetate and ferrocene are homogeneously mixed with conducting polymer nanofibers, and microwaves are applied to trigger the fusion process. The nanofibers rapidly absorb the incoming microwaves and the reaction temperature increases to...
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Hybrid carbon nanowires with unique surface properties are used to construct interfacial water marble at the hexane/water interface, which can sustain almost permanently. Metal oxides can also be integrated into the hybrid carbon nanowires to make supercapacitors with excellent electrochemical properties.
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Hybrid carbon nanowires with tunable elemental composition and nano-scale component mixing resolution can be synthesized by the chemical fusion method in one-pot, which utilizes the unique heating mechanism of conducting polymer under the electromagnetic field of microwave. Carbon nanowire matrices hybridized with metals and oxides can be facilely...
Article
Janus fabric with self-propelled directional wetting patterns is achieved. First, the fabric substrate is coated with photosensitive oxide-based nano titanium dioxide (TiO2) and subjected to post-thermal treatment to make it superhydrophobic. Then one side of the fabric is photo-irradiated with ultraviolet (UV) light through a photo mask to transfo...
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Many emerging interfacial technologies, such as self-cleaning surfaces, oil/water separation, water collection, and microfluidics, are essentially liquid manipulation processes. In this regard, micro-nanostructures of the living organisms are highly preferable, by virtue of the evolutionary pressure and the adaptation to the specific environments,...
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The recent progress in stimuli-responsive liquid-manipulating materials and systems possessing bioinspired micro/nanostructures and surface chemistry is reviewed by John H. Xin and co-workers in article number 1705128. Like “a robot hand picking a liquid drop out of the sea”, these intelligent systems provide important ideas for future technologies...
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A series of boron–nitrogen polymers (PEIPAs) were synthesized to provide a green alternative for flame retardant finishing on cotton fabrics. An organic boron compound, phenylboronic acid (PA) was successfully bonded to the branched polyethylenimine, which was confirmed by ¹H NMR and FTIR analysis. Thermogravimetric analysis showed that the polymer...
Article
A flexible slippery membrane (FSM) with tunable morphology and high elastic deformability has been developed by infusing perfluoropolyether (PFPE) into a fluorinated-copolymer modified thermoplastic polyurethane (TPU) nanofiberous membrane. To immobilize PFPE in TPU matrix, a fluorinated-copolymer poly(DFMA-co-IBOA-co-LMA) with low surface energy,...
Article
In this research, the three-dimensional structural and colorimetric modeling of three-dimensional woven fabrics was conducted for accurate color predictions. One-hundred forty single- and double-layered woven samples in a wide range of colors were produced. With the consideration of their three-dimensional structural parameters, three-dimensional c...
Article
The local pH level in tumor microenvironment usually turns to an acidic range of 5.5-7.0 from the healthy level of 7.4. For this pH change, robust sensors with high sensitivity, water solubility and biocompatibility are highly desirable. Herein, novel zwitterionic betaines were designed and synthesized for the first time as sensitively colorimetric...
Article
The bidirectional texture function (BTF) is widely employed to achieve realistic digital reproduction of real-world material appearance. In practice, a BTF measurement device usually does not use high-resolution (HR) cameras in data collection, considering the high equipment cost and huge data space required. The limited image resolution consequent...
Article
Spectral bidirectional texture function (BTF) is essential for accurate reproduction of material appearance due to its nature of conveying both spatial and spectral information. A practical issue is that the acquisition of raw spectral BTFs is time-consuming. To resolve the limitation, this paper proposes a novel framework for efficient spectral BT...
Article
Bio-inspired by mussels' adhesion, a new protocol for the fabrication of large-sized carbon electrode materials (GCFs) is achieved through an adhesive self-assembly of in-situ-formed multilayered polydopamine nanospheres along with a subsequent pyrolysis. The fabricated GCFs show a 3D hierarchical porous architecture consisting of highly graphitic...
Article
An antibacterial finishing protocol using a reactive sulfobetaine was reported to fabricate safe and durable antibacterial textiles. The specifically designed sulfobetaine contains highly reactive triazine group acting as an anchor to fix the antibacterial betaine group on textiles via covalent bond formation. After the finishing, the textiles were...
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Recently zwitterionic materials have been widely applied in the biomedical and bioengineering fields due to their excellent biocompatibility. Inspired by these, this study presents a graft-to strategy via covalent bond formation to fabricate safe and durable antibacterial textile surfaces. A novel zwitterionic sulfobetaine containing triazine react...
Article
In this article, the effect of the spatial and colorimetric attributes of neighboring color on color appearance shift in bicolor striped woven fabrics is investigated. A total of 240 test/neighboring woven color combinations were constructed in four different striped paradigms. Each test color in the combinations was visually assessed by 12 observe...
Article
It is challenging to explore a unified solution for the treatment of oily wastewater from complex sources. Thus membrane materials with flexible separation schemes are highly desired. Herein, we fabricated a smart membrane by electrospinning TiO2 doped PVDF nanofibers. The as-formed beads-on-string structure and hierarchical roughness of the nanofi...
Article
We report the fabrication of a highly sensitive amphiphilic copolymer-based nanocomposite incorporating with graphene oxide (GO), which exhibited a low-intensity UV light-triggered sol-gel transition. Non-cytotoxicity was observed for the composite gels after the GO incorporation. Of particular interest were the microchannels that were formed spont...
Article
Multispectral imaging system is of wide application in relevant fields for its capability in acquiring spectral information of scenes. Its limitation is that, due to the large number of spectral channels, the imaging process can be quite timeconsuming when capturing high-resolution multispectral images. To resolve this limitation, this paper propos...
Article
A rapid, environment-friendly, and cost-effective finishing method has been developed for cotton textiles by using zwitterionic NCO-sulfopropylbetaine as the antibacterial finishing agent through covalent bond. The sulfopropylbetaine-finished cotton textile exhibits durable broad-spectrum antibacterial and nonfouling activity, improved mechanical p...
Article
A multispectral imaging system, after necessary calibration, can measure the spectral reflectances of colour samples accurately at a high spatial resolution. A limitation is that agreement of its measurements with those of a reference spectrophotometer is affected by the reflective characteristics of sample materials. The state-of-the-art methods a...
Article
This paper compares colour matching of yarn-dyed fabrics by spectrophotometric and multispectral imaging techniques. While it is well known that multispectral imaging systems can measure the colour of fabrics that cannot be acquired by spectrophotometers, comparison of these two types of instrument has not yet been well explored. Colour measurement...
Article
Biomaterials are being extensively used in various biomedical fields; however, they are readily infected with microorganisms, thus posing a serious threat to the public health care. We herein presented a facile route to the antibacterial modification of an important A-B-A type biomaterial using poly (ethylene glycol) methyl ether (mPEG)- poly(ε-cap...
Article
This article proposes a new recoloring method for textile fabric images based on improved fuzzy local information c-means (FLICM) clustering. In the clustering algorithm, the fuzzy factor was modified so that it can produce reliable segmentation in areas with rich details. With the obtained cluster labels and pixel-wise memberships, the color of ea...
Article
The development of an active, durable, and metal-free carbocatalyst that is able to replace metal-based catalysts is of increasing scientific and technological importance. The use of such a catalyst would avoid problems caused by metal-containing catalysts, for example, environmental pollution by heavy metals and depletion of rare metal resources....
Article
To develop an efficient water collecting surface that integrates both fast water capturing and easy drainage properties is of high current interest for addressing global water issues. Herein, a superhydrophobic surface was fabricated on cotton fabric via manipulating both the surface roughness and surface energy. This was followed by a subsequent s...
Article
A grain boundary (GB) in graphene is a linear defect between two specifically oriented graphene edges, whose title angles are denoted as θ1 and θ2, respectively. Here we present a systematic theoretical study on the structure and stability of GBs in graphene as a function of the misorientation angle, Φ = (θ1 - θ2) and the GB orientation in multi-cr...
Article
Inspired by the remarkable adhesive property of marine mussels, a novel method was developed for wool coloration at room temperature. In this method, dopamine was utilized as a biomimetic precursor for wool coloration due to its structure similar to 3,4-dihydroxyphenylalanine, an important component responsible for mussel adhesive. By using dopamin...
Article
Curcumin is a natural dye used in a wide variety of applications including textiles. In this study, it was attempted to determine whether curcumin can be modified for mordant-free coloring of textiles. Curcumin was chemically modified in aqueous system using glycidyltrimethylammonium chloride. The modified product called CurGTMAC was analyzed for s...
Article
Although lots of impact protective materials reported exhibited better impact protective performance thanking to their excellent mechanical performance, their applications were still seriously impeded due to absence of soft-stiffness switch smartness. Herein, a novel impact hardening polymer (IHP) with negative Poisson's ratio was synthesized via a...
Article
Using alkaline pH adjustment, the reaction between graphene oxide and L-ascorbic acid led to the formation of a carbocatalyst film with numerous graphene edges protruding out of basal planes, which had a markedly enhanced carbocatalytic activity for conversion of 4-nitrophenol to 4-aminophenol, as compared to that of the carbocatalyst counterpart w...
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Full-text available
This paper investigates a multispectral imaging approach to colour measurement and colour matching of single yarns. The small size of a single yarn makes it impossible for spectrophotometers directly to acquire its spectral reflectance. Multispectral imaging systems, on the other hand, have the potential to measure the reflectance of single yarns a...
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The state-of-the-art multispectral imaging system can directly acquire the reflectance of a single strand of yarn that is impossible for traditional spectrophotometers. Instead, the spectrophotometric reflectance of a yarn winding, which is constituted by yarns wound on a background card, is regarded as the yarn reflectance in textile. While multis...
Article
A novel smart stimuli responsive surface can be fabricated by the subsequent self-assembly of the graphene monolayer and the TiO2 nanofilm on various substrates, that is, fabrics, Si wafers, and polymer thin films. Multiscale application property can be achieved from the interfacial interaction between the hierarchical graphene/TiO2 surface structu...
Article
A novel bis-rhodamine derivative BRU was designed and synthesized in a simple way. In aqueous media, BRU could efficiently recognize Fe3+ and Al3+ among other metal ions with different color appearances through a turn-on colorimetric response. In the presence of Fe3+ or Al3+, BRU solution also displayed enhanced fluorescent emission. According to t...
Article
Fe3O4 nanoparticles (NPs) with Ag NPs evenly distributed on the surface are fabricated by using polydopamine (PDA) as the intermediate layer. Silanization and thiol chemistry are used to firmly combine the Fe3O4@ PDA core and outer surface Ag NPs. The spherical and hybrid nanoparticles are termed Fe3O4@PDA@Ag NPs, which possess a core–shell and hie...
Article
Many applications in textile require color measurement of single strands of yarns due to unavailability of a mass of consecutive yarns. While multispectral imaging systems can capture images of single strands of yarns, an unavoidable problem accompanied is how to specify their colors from images, in which pixel values vary with positions owing to t...
Article
Metal meshes were conveniently coated with a uniform nanoflake honeycomb network through NiOOH seeding and growth on substrate during a chemical bath deposition process. The resultant meshes exhibited outstanding superhydrophilicity and underwater superoleophobicity, and supported high separation efficiency (> 98%) and good reusability in oil-water...
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Surface functionalization with stimuli-responsive materials can turn an ordinary material into a smart one that shows adaptive properties upon external stimuli. In this study, an electrospun regenerated cellulose (RC) nanofiberous membrane was firstly prepared; subsequently, Poly (N-isopropylacrylamide) (PNIPAAm), a thermo-responsive polymer, was s...
Article
Abstract Conventionally, measuring and thus reproducing yarn color is mainly done in an indirect way, involving the preparation of yarns in card or even fabric forms, which consumes both time and labor. A direct yarn color measurement and reproduction method based on a multispectral imaging system would be one solution to avoid this problem. In thi...
Article
Since the fast development of various chemical industries nowadays pose a serious threat to the environment in terms of leaving behind an increasing quantity of aromatic pollutants, to find an effective approach for handling the aromatic pollutants is of growing scientific and technological importance. Numerous research studies have attempted to ad...
Article
A graphene oxide-based fluorescent nanosensor AGO has been designed and synthesized by covalent grafting allylamine onto GO surface. In aqueous media, AGO displays a highly selective and sensitive discrimination of Fe(3+) from Fe(2+) and other metal ions through electron transfer-induced fluorescence quenching. The quenching of AGO fluorescence is...
Article
This paper presents an efficient approach to solid-colour and multicolour region segmentation in real yarn-dyed fabric images. The approach is based on a novel model describing the spectral response of a multispectral imaging system to yarn-dyed fabrics. The model indicates that solid-colour regions cannot be distinguished from multicolour regions...
Article
This paper proposes a novel method for segmentation of weft and warp yarns in multicolour yarn-dyed fabric images. A multicolour yarn-dyed fabric is cross-woven by weft and warp yarns with different colours. When a multispectral imaging system is used to measure the colour of a multicolour yarn-dyed fabric image, its weft and warp yarns need to be...
Patent
The present invention relates to method of manufacturing a prytheroid-treated fabric and manufactured products created thereby. Through the development and application of prytheroid nanocapsules to a fabric, the fabric exhibits insecticidal properties, even following successive washings and solar exposure.
Article
The current industry practice for producing jacquard fabrics uses computer-aided design (CAD) systems that provide visual simulations of the final color appearance of actual fabrics prior to production. This digital process is fundamentally based on the prediction of combined weave-color effects, which can be successfully achieved by accurate color...
Patent
Full-text available
A method of mass production of tetrakis(p-nitrophenyl)porphyrins, by which successful isolation of the barely soluble product from meso-aryl nitration of tetraphenylporphyrin toward a remarkable yield of nearly 90% has been realized by means of a solid phase extraction technique. This is a simpler and more straight forward synthetic method, suitabl...
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Full-text available
In this study, a functional textile-based material for topical skin application was fabricated by coating a thermoresponsive hydrogel onto one side of absorbent nonwoven fabric. The thermoresponsive hydrogel was synthesized easily through coupling of poly (ethylene glycol) (PEG) and poly (-caprolactone) (PCL) with hexamethylene diisocyanate (HMDI)...
Article
In this article, the influence of texture surface of a fabric on its instrumental color is investigated. While former studies have found it is difficult to establish a quantitative relationships between texture of fabric and its instrumental color (color difference and color attributes, such as lightness, chroma, and hue), this article investigates...
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Recoverable hydrogels with high stretch and toughness have been synthesized by one-step radical polymerization. They consist of covalently crosslinked polyacrylamide (PAAm) and ionically crosslinked carrageenan. Such double network (DN) hydrogels can be stretched beyond 20 times its initial length, and their fracture energy reached a high value of...