Environmental concerns, such as global warming caused by fossil burning, have drawn attention from people and make it necessary to develop photothermal conversion materials that can utilize clean and renewable solar energy. In this study, a novel viscose fiber with photothermal conversion ability was prepared by adding graphene oxide (GO) to viscose solution before wet spinning process. The light-to-heat conversion property of modified fibers was measured by a self-assembly structure. The results indicate that compared with pure viscose sample (ΔT =~30.8 C), the viscose fabric with 4 wt% GO showed larger temperature rise (ΔT =~112 C) within the same exposure time under infrared light. Moreover, it can be verified from ultraviolet-visible-nearinfrared spectroscopy and heat conduction property measurements that both optical absorption and thermal conductivity of GO-viscose fibers were enhanced significantly. Additionally, scanning electron microscope, energy disperse spectroscopy, Fourier transform infrared spectrometer, and thermogravimetric were used to characterize basic features of the composite fiber. Furthermore, It was observed that the doping of low concentration of GO has little effect on fiber strength and stretchability. Consequently, the modified GO-viscose composite is a promising photothermal conversion material for various applications involving solar energy collection and heat supply for architecture.
Purpose The mass transfer of textiles during movement is complicated as the energy consumption (EC) from skin, surface temperature of fabrics together with environment will work synergistically to determine the sensation and comfort of wearer. The purpose of this paper is to reveal the mass transfer in the human-textile-environment dynamic system. Design/methodology/approach With a simulated hotplate mounted on a rotational testing platform, this paper focuses on the dynamic mass transfer of a fabric so as to simulate the real-time mass transfer of clothing in movements. Findings It has been found that the EC and surface temperature (T) change against testing time, indicating the convex and concave shapes of the EC–t and T–t curves. The initial moisture regain of the fabric, rotational speed of the platform and the fiber materials of the fabric have shown a great effect on the dynamic mass transfer process. Practical implications Understanding the dynamic mass transfer of textiles will benefit the design of clothing with better comfort and will contribute to the well-being of wearers. Originality/value This work reveals the dynamic mass transfer of textiles in rotational movements. It contributes a new approach to studying the mass transfer of clothing in real service.
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