Preparation and Performance of Environmentally Friendly Fluorine⁃Free Superhydrophobic Fabric for Oil/Water Separation

doi:10.19894/j.issn.1000-0518.210374

Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (9): 1391-1400.DOI: 10.19894/j.issn.1000-0518.210374

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Preparation and Performance of Environmentally Friendly Fluorine⁃Free Superhydrophobic Fabric for Oil/Water Separation

Xiao-Jian DING¹, Cong-Jun CAO¹(), Cheng-Min HOU¹, Han-Xiao MA¹, Jiao HU¹, Meng-Jie REN¹, Guo-Yong YANG²

^1.School of Printing，Packaging Engineering and Digital Media Technology，Xi'an University of Technology，Xi'an 710048，China
^2.Suzhou Aromem Nano Technology Co. ，Ltd. ，Suzhou 215126，China

Received:2021-07-29 Accepted:2021-11-15 Published:2022-09-01 Online:2022-09-08
Contact: Cong-Jun CAO
About author:caocongjun@xaut.edu.com
Supported by:
the Key Scientific Research Base Project of Shaanxi Province(2019HBGC-55)

Abstract

Abstract:

In view of the common drawbacks of superhydrophobic materials used for oil/water separation， such as unenvironmental raw materials， non-degradability and poor coating durability， etc.， a simple and convenient impregnation method was adopted to prepare an environmental-friendly， excellent superhydrophobic material. Firstly， polymethyl methacrylate-co-glycidyl methacrylate P（MMA-r-GMA） polymer microsphere was fixed on the surface of cotton fabric using waterborne polyurethane （WPU） to construct micro-nano rough structure. Secondly， through a hydrolysis-condensation reaction， non-toxic hexadecyltrimethoxysilane （HDTMS） and methyltriethoxysilane （MTES） were anchored on the surface of the cotton fabric to prepare a superhydrophobic cotton fabric. The results show that the contact angle of the modified cotton fabric is up to 157.3（^o） and the rolling angle is 5（^o）. At the same time， it has good solvent resistance， and the contact angle hardly changes after being immersed in an acid-base solution for 3 h. The oil-water separation efficiency can reach up to 97.8%， even after 10 cycles of separation， the oil-water separation efficiency is still above 95%. It can be seen that the super-hydrophobic fabric prepared by this research has excellent oil-water separation efficiency and excellent stability， and can be used in the field of sustainable and environmentally-friendly oil-water separation.

Key words: Super hydrophobic, Oil-water separation, Environmentally-friendly, Durability

CLC Number:

O631

Xiao-Jian DING, Cong-Jun CAO, Cheng-Min HOU, Han-Xiao MA, Jiao HU, Meng-Jie REN, Guo-Yong YANG. Preparation and Performance of Environmentally Friendly Fluorine⁃Free Superhydrophobic Fabric for Oil/Water Separation[J]. Chinese Journal of Applied Chemistry, 2022, 39(9): 1391-1400.

Figures/Tables 10

Fig.1 Schematic diagram of superhydrophobic cotton fabric

Fig.2 The reaction principle of polymer microsphere P（MMA-r-GMA）， the hydrolysis reaction of MTES and HDTMS in ethanol， and the condensation reaction of MTES and HDTMS on the surface of cotton fabric

Fig.3 （A） FT-IR spectra of MMA， GMA and polymer microsphere P（MMA-r-GMA） and （B） the ethanol solution of MTES， HDTMS and HDTMS/MTES

Fig.4 （A， B） SEM images and （C） PSD image of polymer microsphere P（MMA-r-GMA）

Fig.5 Comparison of hydrophobic effects of cotton before and after modification：（A） Before；（B） After；（C） WCA of the modified cotton；（D） Time-dependent curve of WCA

Fig.6 SEM images of cotton fabric before and after modification

Fig.7 The influence of different failure conditions of （A） chemical corrosion and （B） sandpaper friction on the contact angle of modified cotton fabric

Fig.8 Photos of methyl orange droplets on the surface of superhydrophobic fabric：（A） golden yellow，（B） orange-red，（C） red

Fig.9 The process of using modified cotton fabric to remove chloroform （A-C） and n-hexane （D-F） from water

Fig.10 （A-C） Schematic diagram of oil-water separation of modified cotton fabric；（D） Oil-water separation efficiency of various organic compounds；（E） The relationship between chloroform separation efficiency and the number of separation cycles

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Preparation and Performance of Environmentally Friendly Fluorine⁃Free Superhydrophobic Fabric for Oil/Water Separation

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