Fabric Form Research Articles

Dual-Mode Stretchable Emitter with Programmable Emissivity and Air Permeability.

Materials with anisotropic emission characteristics have attracted considerable attention for thermal management. Although many dual-mode emitters have been developed for this purpose in the form of textiles, multilayer films, and photonic structures, multiple functionalities are essential for their versatile applications. Herein, a highly stretchable dual-mode emitter with programmable emissivity and air permeability is presented. The emitter comprises a planar Ge2Sb2Te5 (GST) cavity on one side of a perforated elastomer substrate and an infrared-reflecting metal layer on the other side. With a laser-induced phase transition from amorphous to crystalline GST, the emitter exhibits a large emissivity difference of 0.52 between both sides. The dual-mode emitter remains highly stable without mechanical failure after repeated stretching cycles to a strain of 50%. This air-permeable and stretchable emitter can be attached to any curved surface, including the human body. The GST-side emissivity can be programmed into an arbitrary emissivity pattern using a spatially modulated laser beam, ultimately enabling the printing of mutually independent visible and thermal images in a single emitter. This study provides a promising structure for multispectral optical security as well as thermal management.

PERANCANGAN BUSANA SIAP PAKAI DENGAN MATERIAL UTAMA TENUN SUMBA LAU PAHIKUNG BERDASARKAN ANALISIS KEBUTUHAN PASAR URBAN

Indonesia's diverse handicrafts include Lau Pahikung woven cloth from Sumba Island, East Nusa Tenggara. Lau means sarong in the local language, and Pahikung is a weaving technique for fabric patterns. This cloth, made using ikat and Pahikung dyeing, is crafted into sarongs for Sumba women. The research partners with the Sekar Kawung Foundation, supported by weavers in East Sumba, who use sustainable methods to create Lau Pahikung fabrics. These fabrics are transformed into urban product displays through market analysis. The analysis, incorporating Maslow's needs theory and Indonesia Trend Forecasting, leads to ready-to-wear fashion designs that cater to specific formal clothing needs, offering versatile contemporary styles.

Obtaining a Practical Wearable Supercapacitor Power Supply

AbstractDue to the ubiquity of textiles in the lives, electronic textiles (E‐textiles) have emerged as a future technology capable of addressing a myriad of challenges from mixed reality interfaces, on‐garment climate control, patient diagnostics, and interactive athletic wear. However, providing sufficient electrical power in a textile form factor has remained elusive. To address this issue, different approaches are discussed, starting with supercapacitors' advantages and limitations and material choices for textile‐based supercapacitors before discussing proper data analysis and design considerations of textile‐based energy storage to power wearable electronics.

A Comprehensive Study on Electrospun Cholesteric Liquid Crystal Core Fibers for Detecting Volatile Organic Compounds

Encapsulation of the cholesteric liquid crystal (CLC) into the core of poly(vinylpyrrolidone) (PVP) microfibers is accomplished via coaxial electrospinning technology and is applied to detect volatile organic compounds (VOCs). The impacts of various process parameters on the morphology of CLC fibers are deeply explored. The periodic arrangement of CLC molecules within the fibers enables the reflection of specific wavelengths. Consequently, changes in the reflected color of the CLC fiber membrane allow for the measurement and analysis of targeted gas molecules. The dynamic response of CLC fibers upon exposure to organic vapor is observed by a polarizing optical microscope, and its gray scale is used to quantitatively analyze the changes of reflected light signals of CLC fibers. Furthermore, the study investigates the reaction time for the failure of CLC molecular planar alignment in the CLC fiber membrane when subjected to perturbations induced by organic gases. The CLC fiber sensor exhibits heightened sensitivity to gases characterized by greater polarity. In light of potential future advancements, it is suggested that the spun fibers imbued with responsive properties through the incorporation of a liquid crystal core exhibit promise as a next-generation sensor technology in textile form, well-suited for applications in wearable technology.

Defining application areas of corn husk fibre by studying its characteristics.

Natural fibres have attracted more attention compared with synthetic fibre because they exhibit several benefits over synthetic fibre, such as being cost-effective, readily available, and lightweight apart from offering better mechanical properties. Corn husk fibres being a natural crop fibre have attracted more attention due to their renewability and biodegradability. Corn husk is an outer protective layer of maize which is generally discarded as waste. However, this agro-waste can be utilized exclusively for various applications with a sustainable approach by extracting fibres out of them. This paper aims to revolutionize the usage of corn husk fibres in conventional as well as technical textile industries by enlisting various application areas. A comprehensive understanding of corn husk fibre extraction techniques and their effect on various fibre properties are also discussed. These properties are compared with properties of other natural fibres, to enable the possibility of converting corn husk fibres into different textile forms such as yarn, woven and nonwoven fabric, and composites. This will fulfill the increasing demand for natural fibre along with biodegradability and reduced petroleum dependency while contributing to the purpose-driven use of agro waste.

Insiders Versus Outsiders: A Comparative Study of Female Politician’s Social Media use

In the past, the media had a tendency to neglect women's issues, thereby restricting their visibility concerning development endeavours and political representation. However, this is changing due to technological advancements. Social media offers female politicians access to millions of users, freedom to interact directly with the electorate, bypass gatekeepers and opportunities for self-promotion. This research aims to investigate female politicians' social media use during their legislative terms with a focus on their self-presentation and the policy issues they support. The study involves content analysis of six female politicians from countries with a much lower female representation than their regional counterparts; three from Kenya and three from Hungary who have the highest number of followers on Twitter and Facebook respectively. The data was collected over a three-month period. The visuals were coded using 3 variables based on the insider and outsider perspective (Gulati 2004) while the text was coded in accordance with the 21 policy agendas defined by the Comparative Agendas Project codebook (Baumgartner 2019). The results indicate that a majority of female politicians in both countries, in the ruling parties presented themselves as insiders while those in the opposition presented themselves as outsiders. The insiders were majorly characterized by wearing of formal clothing, an important element of statesmanship, that portrays them as ideal candidates. In addition, the insiders' social media use was characterized by original content while outsiders reshared articles and retweets. Both Kenyan and Hungarian female politicians addressed women related policy issues. There were however some differences in social media use and self-presentation between the female politicians of the two countries such as the sharing of personal information and family pictures. The limitation of this study is that it does not fully represent the views and use of social media of all female politicians in Kenya and Hungary.

Verification of material characteristic of natural fibers for concrete reinforcement

The topic of the article is the verification of the tensile mechanical characteristics of selected natural fibres commonly available on the Czech market. Due to their high tensile strengths, some natural materials have a certain potential for use in specific engineering applications such as concrete reinforcement. Additionally, natural fibres are renewable materials, making them an environmentally friendly material. Potentially, its use as a reinforcement in the form of technical textiles for textilereinforced concrete could help create more sustainable reinforced concrete elements. This article deals with tensile tests of chosen available natural fibre materials, such as flax, hemp, jute, and sisal, both pure and impregnated (homogenised) using epoxy resin. In this article, the results and comparisons of tensile strengths and Young’s modulus are presented.

Abstractions and resistance: why take an interest in the history of textile forms?

Abstractions and resistance: why take an interest in the history of textile forms?

Structure design of light-resistance fluorane dyes and preparation of color changing materials

Fluorane dyes were widely applicated in the thermochromic area, especially in the form of smart textiles, as they could adjust color via electron transfer. However, developing perfect bright color and light-resistance fluorane dyes had remained challenging due to the intrinsic structural limitations. Here, we reported a series of new fluorane dyes with different electron withdrawing groups that controlled the electron cloud density of the lactone ring, which enhance the thermochromic stability and light-resistance properties. The red shift or blue shift of the absorption wavelength, which could broaden the dye's spectrum, was controlled by the number of electron-absorbing substituents. Moreover, fluorane dyes with a withdrawing group introduced at the R3 position of the lactone ring had excellent light-resistance ability, which was 66%∼57.2% lower than that of commercial dye after 14 h of light irradiation. But, the excess substituents would have weakened its original light-resistance. We also explain the photostability associated with the electron distributon using Density Functional Theory (DFT) simulation. This achievement in the development of light-resistance fluorane offers a promising solution for the application of color-changing materials with a broad absorption spectrum and light-resistance.

2D Materials Beyond Post-AI Era: Smart Fibers, Soft Robotics, and Single Atom Catalysts.

Recent consecutive discoveries of various 2D materials have triggered significant scientific and technological interests owing to their exceptional material properties, originally stemming from 2D confined geometry. Ever-expanding library of 2D materials can provide ideal solutions to critical challenges facing in current technological trend of the fourth industrial revolution. Moreover, chemical modification of 2D materials to customize their physical/chemical properties can satisfy the broad spectrum of different specific requirements across diverse application areas. This review focuses on three particular emerging application areas of 2D materials: smart fibers, soft robotics, and single atom catalysts (SACs),which hold immense potentials for academic and technological advancements in the post-artificial intelligence (AI) era. Smart fibers showcase unconventional functionalities including healthcare/environmental monitoring, energy storage/harvesting, and antipathogenic protection in the forms of wearable fibers and textiles. Soft robotics aligns with future trend to overcome longstanding limitations of hard-material based mechanics by introducing soft actuators and sensors. SACs are widely useful in energy storage/conversion and environmental management, principally contributing to low carbon footprint for sustainable post-AIera. Significance and unique values of 2D materials in these emerging applications are highlighted, where the research group has devoted research efforts for more than a decade.

Strontium isotope evidence for Pre-Islamic cotton cultivation in Arabia

With a view to understanding the dynamics of ancient trade and agrobiodiversity, archaeobotanical remains provide a means of tracing the trajectories of certain agricultural commodities. A prime example is cotton in Arabia, a plant that is non-native but has been found in raw seed and processed textile form at Hegra and Dadan, in the region of al-ʿUlā, north-western Saudi Arabia—sites of critical importance given their role in the trans-Arabian trading routes during Antiquity. Here, we demonstrate that the measurement of strontium isotopes from pre-cleaned archaeological cotton is methodologically sound and is an informative addition to the study of ancient plant/textile provenance, in this case, putting forward evidence for local production of cotton in oasis agrosystems and possible external supply. The presence of locally-grown cotton at these sites from the late 1st c. BCE–mid 6th c. CE is significant as it demonstrates that cotton cultivation in Arabia was a Pre-Islamic socio-technical feat, while imported cotton highlights the dynamism of trade at that time.

PERANCANGAN KAMPANYE “BATIK NONGKRONG” MENGGUNAKAN BATIK SURABAYA UNTUK ANAK MUDA

Batik is an intangible cultural heritage of Indonesia that has been recognized by UNESCO and needs to be preserved. But unfortunately there are limitations to wearing batik, many consider batik as formal clothing that is only suitable for formal events such as weddings, offices, and other events. The purpose of this design is to normalize the use of batik clothes in various places, therefore a design for this batik hangout campaign was created using qualitative research methods by interviewing several sources who understand design. With this design, it is hoped that batik can be accepted by young people for use in casual activities, starting from cafes, entertainment facilities, and other leisure activities. The design result is an Instagram social media account named @banong.id, Instagram social media was chosen because it is easily accessible by young people.

Determining the features of histograms of dangerous parameters of the gas environment in the absence and occurrence of fire

The object of research is histograms of the dynamics of dangerous parameters of the gas environment, the values of which are measured in real time at the intervals of absence and ignition of materials. The method of determining histograms during a typical selection of measurements is described. This method allows one to determine histograms for samples of an arbitrary position and the size of the data interval of measurements of the dynamics of dangerous parameters of the gas environment. On the basis of histograms on the intervals of the absence and occurrence of fires of test materials, indicators of their summary statistics can be determined. Laboratory experiments were conducted to study the features of the histograms of carbon monoxide concentration, smoke density, and temperature of the gas medium for intervals of reliable absence and appearance of ignition of materials in the form of alcohol and textiles. The results of the analysis of the histograms clearly show that the dynamics of the studied dangerous parameters at the indicated intervals differ from the Gaussian. At the same time, the histograms differ in shape, which depends on the type of ignition material and the corresponding dangerous parameter. Based on the features of the histograms of the dynamics of dangerous parameters on the intervals of the absence and appearance of fires of test materials, the simplest indicators of summary statistics in the form of the range, number, and position of the modes are determined. It was established that when alcohol ignites, the variation range of carbon monoxide concentration, smoke density, and gas temperature increases from 0.545, 0.068, and 0.161 to 7.121, 0.523, and 8.71, respectively. At the same time, the range of variation of these parameters during textile ignition increases from 0.182, 0.205, and 0.323 to 0.394, 0.386, and 2.903, respectively. The obtained results in aggregate or one by one can be used in practice for early detection of fires in order to prevent the occurrence of fires in premises

Strategies for Improving the Damage Tolerance of Future Composite Materials

Improving the damage tolerance of a composite is identified as a key goal for future developments. A change in emphasis is suggested with a move away from the philosophy of improving performance by increasing the resistance of the laminate to damage formation, which should be accompanied by attempts to control the nature of damage such that energy can be absorbed through cracking in a way that is not deleterious to the final properties of the structure.
 Different strategies are proposed to achieve this, consisting of specific attempts to maximise the resistance of the laminate to damage growth by improving interlaminar toughness, GI (prop) or by introducing new architecture into the composite such that the nature of damage is modified. Examples are provided of the use of interlaminar veils, 3D textile forms and the use of specific fiber hybridisation to facilitate the improved resistance to crack propagation.

Investigation of factors affecting turn signal usage at modern roundabouts in State of Qatar

ABSTRACT Drivers are expected to use turn signals to indicate other drivers of their intentions of taking turns, lane changing, merging or diverging indicating safe driving behaviour. This study investigated the rates of turn signal usage at multilane urban roundabouts along with factors affecting the usage. The results from data collected from four roundabouts in Doha city showed that the drivers have higher tendency of using turn signals while exiting the roundabout rather than while entering the roundabout. Further, turn signal usage at entry and exit of the roundabouts was affected by turn type, roundabout type, correct lane, vehicle type, age, type of clothes and distraction. Additionally, using correct lane affected turn signal usage only while exiting the roundabouts. The binary logistic regression models showed that the drivers wearing formal clothes, taking left or U-turn, using correct lane, driving without distraction, and traversing a roundabout located in recreation and commercial land use had higher odds of turn signal usage than their counterparts. The lower turn signal usage rates indicate that more emphasis should be provided on educating drivers highlighting safety implications. Further, traffic engineers can suggest additional strategies to improve turn signal usage based on the results. These findings can be applicable to other GCC countries exhibiting similar characteristics.

Programmable microfluidics for dynamic multiband camouflage

Achieving multiband camouflage covering both visible and infrared regions is challenging due to the broad bandwidth and differentiated regulation demand in diverse regions. In this work, we propose a programmable microfluidic strategy that uses dye molecules in layered fluids to manipulate visible light- and infrared-semitransparent solvent to manipulate infrared light. With three primary fluid inputs, we achieve 64 chromaticity values and 8 emissivities from 0.42 to 0.90. In view of the wide tuning range, we demonstrate that the microfluidic film can dynamically change its surface reflectance to blend into varying backgrounds in both visible and infrared images. Moreover, we fabricate the microfluidic device in a textile form and demonstrate its ability to match exactly with the colors of natural leaves of different seasons in the full hyperspectrum range. Considering the broadband modulation and ease of operation, the programmable microfluidic strategy provides a feasible approach for smart optical surfaces in long-span optical spectra.

Biophysical Sensors Based on Triboelectric Nanogenerators.

Triboelectric nanogenerators (TENGs) can not only collect mechanical energy around or inside the human body and convert it into electricity but also help monitor our body and the world by providing interpretable electrical signals during energy conversion, thus emerging as an innovative medical solution for both daily health monitoring and clinical treatment and bringing great convenience. This review tries to introduce the latest technological progress of TENGs for applications in biophysical sensors, where a TENG functions as a either a sensor or a power source, and in some cases, as both parts of a self-powered sensor system. From this perspective, this review begins from the fundamental working principles and then concisely illustrates the recent progress of TENGs given structural design, surface modification, and materials selection toward output enhancement and medical application flexibility. After this, the medical applications of TENGs in respiratory status, cardiovascular disease, and human rehabilitation are covered in detail, in the form of either textile or implantable parts for pacemakers, nerve stimulators, and nerve prostheses. In addition, the application of TENGs in driving third-party medical treatment systems is introduced. Finally, shortcomings and challenges in TENG-based biophysical sensors are highlighted, aiming to provide deeper insight into TENG-based medical solutions for the development of TENG-based self-powered electronics with higher performance for practical applications.

Effect of Material Properties on Fiber-Shaped Pneumatic Actuators Performance

Thin fiber-shaped pneumatic artificial muscle (PAM) can generate contractile motions upon stimulation, and it is well known for its good compliance, high weight-to-power ratio, resemblance to animal muscle movements, and, most importantly, the capability to be integrated into fabrics and other textile forms for wearable devices. This fiber-shaped device, based on McKibben technology, consists of an elastomeric bladder that is wrapped around by a braided sleeve, which transfers radial expansion into longitudinal contraction due to the change in the sleeve’s braiding angle while being inflated. This paper investigates the effect of material properties on fiber-shaped PAM’s behavior, including the braiding yarn and bladder’s dimensional and mechanical properties. A range of samples with combinations of yarn and bladder parameters were developed and characterized. A robust fabrication process verified through several calibration and control experiments of PAM was applied, which ensured a more accurate characterization of the actuators. The results demonstrate that material properties, such as yarn stiffness, yarn diameter, bladder diameter, and bladder hardness, have significant effects on PAMs’ deformation strains and forces generated. The findings can serve as fundamental guidelines for the future design and development of fiber-shaped pneumatic actuators.

Comparative study between choices of preoperative and post operative dress wear among orthopedics patients

Background: Clothes are identity of an individual. A monk, a priest, a doctor, a lawyer etc. all can be identified by clothing. But can we identify preoperative and postoperative orthopedics patient simply by difference in clothing? Can we evaluate the reasons for this difference in clothing mainly due to hide surgical scar or may be due to comfort fit or may be due to compensation of gait abnormalities etc. Methods: The study was conducted at Maharaja Agrasen medical college, India with a population of 1000 OPD and indoor patient for a period of 6 months from January 2022 to June 2022, with data collection and compilation for another 3 months. Our study is an observational retrospective study which discovers where pre trauma preference is for skin tight clothing like jeans, t shirt for men and skirt for girls, post trauma post operative preference shifts to loose and formal clothes like full sleeves shirt, formal pant, pajama, lungi, dhoti for men and full length skirt for girl and saree for women. Results: Causes enlisted for such clothing was hiding surgical scar (80%), comfortable fitting (10%), to hide gait abnormalities (7%), limb length discrepancies (2%), miscellaneous (1%). Conclusions: We claim to be first in literature to have thought and research on this wonderful topic. We claim to devise new system of surgical and non-surgical wear in post operative patients with our research. We also bring out reason for such difference in clothing and work closely with our in-house patient for preference in clothing.

Microelectronic fibers for multiplexed sweat sensing.

Wearable bioelectronics are gaining extraordinary attention due to their capabilities to achieve continuous monitoring of human health status. However, mainstream manufacturing technologies, including photolithography and printing technology, limit current wearable bioelectronics on 2D planar structures with little surface area in contact with the body. It thus limits the amount of physiological information that current wearable bioelectronics could obtain. Furthermore, they need to be firmlyattached to the body, affecting the wearing comfort. In this study, we leveraged the versatile thermal drawing process and developed a flexible microelectronic fiber with bioanalytical functions that could be woven into textiles as a new form of wearable bioelectronics. Within a single strand of fiber, we successfully integrated all-in-one multiplexed electrochemical sensing capabilities, with the sweat as the primary object. Adopting the laser micromachining technique, we developed biosensing functions on the longitudinal surface of the fiber with two sensing electrodes for Na+ and uric acid (UA), respectively, together with a pseudo reference electrode (p-RE). We carefully characterized the all-in-one multiplexed sensing performance of the fiber and demonstrated its successful application in sweat sensing based on its textile forms. The results show significant potential for application in wearable textiles for monitoring key health signals of humans.