The hydrophobically modi fied ceramic membranes have great potential for energy-ef ficient membrane distillation.In this work,flat-sheet ceramic membranes with a superhydrophobic surface were fabricated by grafting 1H...The hydrophobically modi fied ceramic membranes have great potential for energy-ef ficient membrane distillation.In this work,flat-sheet ceramic membranes with a superhydrophobic surface were fabricated by grafting 1H,1H,2H,2H-per fluorooctyltrichlorosilane or 1H,1H,2H,2H-per fluorodecyltriethoxysilane and followed by ultraviolet irradiation.The surface water contact angle was improved from 46° of original ceramic membrane to 159°,which exhibited a stable and excellent superhydrophobic effect.The modi fied membranes showed a high flux of 27.28 kg·m^(-2)·h^(-1) and simultaneously maintained an excellent retention rate of 99.99%,when used in vacuum membrane distillation process for treatment of a 1 wt% NaCl(75 °C) aqueous solution.These results suggested that superhydrophobic modi fication of ceramic surface is a facile and cost-effective way to achieve higher membrane distillation performance.The superhydrophobically-modi fied ceramic membrane with an excellent desalination capacity would show considerable potential in practical membrane distillation utilizations.展开更多
Superhydrophobic cellulose-based products have immense potential in many industries where plastics and other polymers with hydrophobic properties are used.Superhydrophobic cellulose-based plastic is inherently biodegr...Superhydrophobic cellulose-based products have immense potential in many industries where plastics and other polymers with hydrophobic properties are used.Superhydrophobic cellulose-based plastic is inherently biodegradable,renewable and non-toxic.Finding a suitable replace-ment of plastics is highly desired since plastics has become an environmental concern.Despite its inherent hydrophilicity,cellulose has unparalleled advantages as a substrate for the produc-tion of superhydrophobic materials which has been widely used in self-cleaning,self-healing,oil and water separation,electromagnetic interference shielding,etc.This review includes a compre-hensive survey of the progress achieved so far in the production of super-hydrophobic materials based on cellulose and fiber networks.The methodologies and applications of superhydrophobic-modified cellulose and fiber networks are emphasized.Overall,presented herein is targeting on summarizing some of the aspects that are critical to advance this evolving field of science which may provide new ideas for the developing and exploring of superhydrophobic and green-based materials.展开更多
The superhydrophobic surface was fabricated on the AZ31 alloy by the combination of the hydrotherreal treatment method and post modification with stearic acid. The superhydrophobic surface showed a static water contac...The superhydrophobic surface was fabricated on the AZ31 alloy by the combination of the hydrotherreal treatment method and post modification with stearic acid. The superhydrophobic surface showed a static water contact angle of 157.6°. The characteristics of the coatings were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD） and Fourier transform infrared spectroscopy （FTIR）. The corrosion resistance of the superhydrophobic coatings was investigated by potentiodynamic polarization test and electrochemical impedance spectroscopy （EIS）. The results revealed that the superhydrophobic coatings, characterized by petal-like structure significantly improved the corrosion resistance of the AZ31 ahoy.展开更多
基金Supported by the National Natural Science Foundation of China(51473013)
文摘The hydrophobically modi fied ceramic membranes have great potential for energy-ef ficient membrane distillation.In this work,flat-sheet ceramic membranes with a superhydrophobic surface were fabricated by grafting 1H,1H,2H,2H-per fluorooctyltrichlorosilane or 1H,1H,2H,2H-per fluorodecyltriethoxysilane and followed by ultraviolet irradiation.The surface water contact angle was improved from 46° of original ceramic membrane to 159°,which exhibited a stable and excellent superhydrophobic effect.The modi fied membranes showed a high flux of 27.28 kg·m^(-2)·h^(-1) and simultaneously maintained an excellent retention rate of 99.99%,when used in vacuum membrane distillation process for treatment of a 1 wt% NaCl(75 °C) aqueous solution.These results suggested that superhydrophobic modi fication of ceramic surface is a facile and cost-effective way to achieve higher membrane distillation performance.The superhydrophobically-modi fied ceramic membrane with an excellent desalination capacity would show considerable potential in practical membrane distillation utilizations.
基金This work is supported by NSERC Canada and funding for the Joint International Research Lab of Lignocellulosic Functional Materials at Nanjing Forestry University.
文摘Superhydrophobic cellulose-based products have immense potential in many industries where plastics and other polymers with hydrophobic properties are used.Superhydrophobic cellulose-based plastic is inherently biodegradable,renewable and non-toxic.Finding a suitable replace-ment of plastics is highly desired since plastics has become an environmental concern.Despite its inherent hydrophilicity,cellulose has unparalleled advantages as a substrate for the produc-tion of superhydrophobic materials which has been widely used in self-cleaning,self-healing,oil and water separation,electromagnetic interference shielding,etc.This review includes a compre-hensive survey of the progress achieved so far in the production of super-hydrophobic materials based on cellulose and fiber networks.The methodologies and applications of superhydrophobic-modified cellulose and fiber networks are emphasized.Overall,presented herein is targeting on summarizing some of the aspects that are critical to advance this evolving field of science which may provide new ideas for the developing and exploring of superhydrophobic and green-based materials.
基金supported by the National Natural Science Foundation of China(No.21306214)the Applied Basic Research Foundation of Qingdao(No.13-1-4-217-jch)+2 种基金the Scientific Research Foundation of Shandong for Outstanding Young Scientists(No.BS2013CL009)the Doctoral Program Foundation of the State Education Ministry(No.20133718120003)the SDUST Research Fund(No.2014TDJH104)
文摘The superhydrophobic surface was fabricated on the AZ31 alloy by the combination of the hydrotherreal treatment method and post modification with stearic acid. The superhydrophobic surface showed a static water contact angle of 157.6°. The characteristics of the coatings were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD） and Fourier transform infrared spectroscopy （FTIR）. The corrosion resistance of the superhydrophobic coatings was investigated by potentiodynamic polarization test and electrochemical impedance spectroscopy （EIS）. The results revealed that the superhydrophobic coatings, characterized by petal-like structure significantly improved the corrosion resistance of the AZ31 ahoy.
