Highly robust and durable core-sheath nanocomposite yarns for electro-thermochromic performance application

Pan, Junjie; Hao, Baowei; Xu, Pengjun; Li, Daiqi; Luo, Lei; Li, Jianqiang; Xia, Zhigang; Cheng, Deshan; Xu, Anchang; Cai, Guangming; Wang, Xin

doi:10.1016/j.cej.2019.123376

Cited by 29 publications

(11 citation statements)

References 48 publications

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“…Figure 5 describes the electrical thermal energy conversion and storage testing procedure of the composite yarns. For the CCY yarn, the obtained temperature evolution curve exhibits the same characters to that reported in the previous study [31], the surface temperature increases sharply from room temperature to about 110°C within several seconds (Figure 5a) and drops immediately to the room temperature (about 33°C) when the current is off (Figure 5b). Temperature evolution curves of the PPCCY yarns also show similar characters, but their equilibrium temperature is much lower than that of CCY, which is related the resistance.…”

Section: Resultssupporting

confidence: 83%

“…Solution of polyacrylonitrile (PAN) in DMF with concentration 12 wt% was prepared. PAN was electrospun onto the PCCY to get PAN/ PEG/CCY compound yarn (PPCCY) using a two-nozzle electrospinning machine, as reported in previous work [31]. As described in Scheme 1, this electrospinning system consists of two nozzles with different charges placed in front of each other, and a rotary grounded metal plate for winding the yarn coated with nano fibers.…”

Section: Methodsmentioning

confidence: 99%

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A novel composite cotton yarn with phase change and electrical conductivity functions

Jin

Cai

et al. 2021

Journal of Industrial Textiles

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PAN/PEG/CNT/cotton composite yarn (PPCCY) was fabricated by impregnating PEG2000–10000 into CNT/cotton yarn (CCY) and coating electrospun PAN around its surface. The effects of PEG type on the morphology, structure, electrical resistance and phase change behavior of the produced composite yarns were studied thoroughly by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermal gravimetric(TG), electrical resistance tester and infrared thermal images. The experimental results indicated that the resulting compound yarn consisted of conductive yarn within which the spacing between cotton fibers was fulfilled by PEG, rendering phase transition enthalpy from 126–150 Jg−1. The composite yarn exhibited adjustable temperature and thermal storage and electrical conductivity abilities. The composite yarn demonstrated good responsive properties to external electrical and thermal stimuli and had reversible heat conversion and storage, which shows a promise for applications in electrical wearable fabrics.

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Section: Resultssupporting

confidence: 83%

Section: Methodsmentioning

confidence: 99%

A novel composite cotton yarn with phase change and electrical conductivity functions

Jin

Cai

et al. 2021

Journal of Industrial Textiles

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“…Commercial photochromic and thermochromic dyes have completely mature and independent chromic mechanisms (see Note S1 in the Supplementary information). Some researchers have integrated photochromic or thermochromic dyes in wearable monitoring devices such as skin patches [15,17], core-sheath fibers [18][19][20][21] and textiles [22] by wet spinning [21,23], electrospinning [24], melt spinning [25], screen printing [26], grafting [27,28], and coating [29]. Since these chromic dyes can be easily rendered ineffective, they are usually encapsulated in polymers such as core layers of coresheath fibers [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Since these chromic dyes can be easily rendered ineffective, they are usually encapsulated in polymers such as core layers of coresheath fibers [18][19][20][21]. This enhances their durability and practical performance by hindering unnecessary reactions [19]. To realize the innovative monitoring of the UV index and IR radiation temperature simultaneously and independently in a single fiber, the chromic dyes and substrates in these devices need to be carefully structured.…”

Section: Introductionmentioning

confidence: 99%

Independent dual-responsive Janus chromic fibers

et al. 2021

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Daily exposure under solar ultraviolet (UV) and infrared (IR) is prone to cause skin cancer and photoaging. Real-time monitoring of the environmental UV index and IR radiation temperature during outdoor activities can enhance awareness and strengthen personal protection. It is a challenge to design flexible, wearable devices (with measurement capabilities) that can be integrated with apparels. Here, microfluidic spinning technology (MST) was used for the continuous and large-scale fabrication of eco-friendly coresheath Janus fibers with a well-defined axially symmetric Janus core. One side of the core was sensitive to UV light and the opposite was sensitive to IR radiation. Textiles woven with Janus fibers showed excellent independent reversible color responses to dual-wavelength stimulation. Such textiles switched among four colors under UV and IR irradiation, both individually and in combination. The color gradient of the textiles changed significantly with increasing UV intensity (UV index). After 60 cycles of UV/IR stimulation and 50 washes, the change rate of the comprehensive chromatic aberration (∆E * ab ) of the textiles under different conditions was only 0.42%-4.71%. This was attributed to the unique structure of the fibers. The three-line striped textiles demonstrated the potential of the fibers to be used as wearable energy-free realtime visual monitors of the UV index and IR radiation temperature.

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“…[26,27] Electric heating is another way to trigger the color of thermochromic textiles, and the electrothermochromic fabric is generally prepared by combining the resistive heating properties of conductive materials and the reversible color-changing performance of thermochromic materials. [28][29][30] It should be pointed that the superb heating performance of conductive materials is meaningless without electrical power supply, which greatly limits the application of electrothermochromic fabric. [31] Especially, direct heating is not convenient on many practical occasions, which increases the complexity of the device's structure and still consumes energy.…”

mentioning

confidence: 99%

Sunlight‐Responsive Photothermochromic Fabric with Reversible Color Changing Based on Photothermal Conversion

Wan

et al. 2021

Solar RRL

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Intelligent color‐changing textiles have attracted increasing attention due to their potential application in healthcare monitoring and artificial intelligence. To realize the active modulation of color via sunlight, the photothermochromic fabric that adjusts its color based on the photothermal conversion performance of the sunlight‐responsive heating layer under irradiation of solar is fabricated by double‐side coating. Depending on the light absorption at 350–2500 nm, the sunlight‐responsive photothermochromic fabric (SPTCF) exposed under the irradiation power density of 500 W m−2 for 4 min displays efficient photothermal conversion, resulting in the increase in temperature from room temperature (23.0 °C) to above 47.0 °C. Simultaneously, the color of SPTCF changes from blue to white and returns to blue once the light is turned off for 3 min, indicating the sensitive and reversible photothermochromic property of the SPTCF. Compared with the contrast layer, the sunlight‐responsive heating layer exhibits a rapid photothermal conversion speed and high optical contrast under the same irradiation condition. The heating/cooling curves show steady signals after mechanical deformations and 150 cycles, revealing the favorable durability of the SPTCF under the solar irradiation. The sensitive photothermochromic properties promote the application of the SPTCF in smart wearable fields.

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Highly robust and durable core-sheath nanocomposite yarns for electro-thermochromic performance application

Cited by 29 publications

References 48 publications

A novel composite cotton yarn with phase change and electrical conductivity functions

A novel composite cotton yarn with phase change and electrical conductivity functions

Independent dual-responsive Janus chromic fibers

Sunlight‐Responsive Photothermochromic Fabric with Reversible Color Changing Based on Photothermal Conversion

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