Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (08): 115-121.doi: 10.13475/j.fzxb.20201200107

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and performance of aramid fabric-based interfacial photothermal evaporation materials

CHEN Yali1,2, ZHAO Guomeng2, REN Lipei2, PAN Luqi2, CHEN Bei2, XIAO Xingfang1,2(), XU Weilin2   

  1. 1. Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing, Wuhan Textile University, Wuhan, Hubei 430200, China
    2. State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, Hubei 430200, China
  • Received:2020-12-01 Revised:2021-02-09 Online:2021-08-15 Published:2021-08-24
  • Contact: XIAO Xingfang E-mail:xingfangxiao1@163.com

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Abstract:

Solar steam generation technology is one of the most promising techniques for obtaining fresh water because of its low cost, safety, environmental friendliness and high efficiency. In order to achieve efficient and stable photothermal performance of absorbers in the solar interfacial water evaporation system, an aramid fabric with high performance was used as the substrate to prepare the polydopamine and activated carbon modified aramid fabric by in-situ polymerization and dip-coating methods. The microstructure, wettability, light absorption, light absorption stability and mechanical properties of the aramid fabric before and after modification were tested and analyzed, and the solar-vapor generation performance was tested by a self-assembled device. The results show that the modified aramid fabric demonstrates a remarkable improvement in wettability and light absorption, together with stable light absorption and mechanical strength. At one-sun intensity, the steam generation rate of the aramid fabric based evaporation device for multiple cycles is stable at 1.81 kg/(m2·h). The evaporation device used for generating freshwater from wastewater could be used in long-term stable wastewater treatment.

Key words: aramid fabric, photothermal conversion, interfacial evaporation, solar steam generation technology, wastewater treatment

CLC Number: 

  • TS190.8

Fig.1

Preparation flow chart of AC-PDA-AF"

Fig.2

Schematic diagram of evaporation device working principle(a) and solar water evaporator(b)"

Fig.3

SEM images of aramid fabric before and after modification"

Fig.4

Water contact angle images of aramid fabric before and after modification"

Fig.5

Solar spectrum and absorption spectrum of aramid fabric before and after modification"

Fig.6

Light absorption spectra and optical images of fabrics before and after ultrasonic treatment"

Fig.7

Light absorption spectra of PDA-AF and AC-PDA-AF before and after washing"

Fig.8

Stress-strain curves of aramid fabric before and after modification"

Fig.9

Thermal imaging images of pure water(a), PDA-AF(b) and AC-PDA-AF(c)"

Fig.10

Evaporation rate of different samples(a) and AC-PDA-AF after 30 cycles(b)"

Fig.11

Environment and result of outdoor experiment. (a) Line chart of solar intensity and temperature changes; (b) Volume of condensed water collected by solar water evaporation; (c) pH and electrical resistivity change before and after purification"

Fig.12

Diagram of outdoor solar water evaporator"

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