Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (08): 109-114.doi: 10.13475/j.fzxb.20201001006

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation of superhydrophobic coated cotton fabrics for oil-water separation

LI Weibin, ZHANG Cheng, LIU Jun()   

  1. School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu 212000, China
  • Received:2020-10-06 Revised:2021-05-11 Online:2021-08-15 Published:2021-08-24
  • Contact: LIU Jun E-mail:348755913@qq.com

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Abstract:

Aiming at the poor durability of superhydrophobic material surfaces, a durable superhydrophobic coating on cotton fabrics has been fabricated by immersing the fabrics into a solution consisting of SiO2 particles modified by octadecylamine and dodecyltrimethoxyl, and polydimethylsilane. The chemical composition, surface morphology, contact angle, mechanical durability, chemical stability and oil-water separation performance of superhydrophobic cotton fabric were tested and characterized. The results show that when the addition of polydimethylsilane is 1.0 mL and the amount of modified SiO2 is 3.0 g, the obtained fabric exhibits excellent superhydrophobic property with a water contact angle of 164.5°. Superhydrophobic cotton fabric is proven to be resistant to mechanical abrasion and acidic and alkaline attacks. In addition, the practical application of the modified fabric for oil-water separation is also demonstrated with a high separation efficiency above 90%. The superhydrophobic cotton fabric developed in this research is strong, environmentally friendly, easy to manufacture, and has broad application prospects in the field of oil-water separation.

Key words: superhydrophobic fabric, oil-water separation, cotton fabric, silica, polydimethylsilane

CLC Number: 

  • TS116

Fig.1

FT-IR spectra of SiO2,ODA-SiO2 and ODA-SiO2-DTMS particles"

Fig.2

SEM images of raw cotton fabric(a) and superhydrophobic cotton fabric surfaces coated with ODA-SiO2-DTMS and PDMS(b)(× 2 000)"

Fig.3

Influence of ODA-SiO2-DTMS (a) and PDMS (b) addition on water contact angles"

Fig.4

Water contact angles of superhydrophobic cotton fabric"

Fig.5

Surface wettability of superhydrophobic cotton fabric after 50 abrasion cycles. (a) Surface image; (b)Water contact angle"

Fig.6

Contact angle variations of super hydrophobic fabric with abrasion cycles"

Fig.7

Water contact angle of superhydrophobic cotton fabric under different pH conditions"

Fig.8

Photo of water droplets and oil droplets on superhydrophobic cotton fabric"

Fig.9

Efficiency of oil-water separation for different oils"

Fig.10

Oil-water separation efficiency of 10 cycles of oil-water separation between trichloromethane and water"

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