Directly Coating Hydrogel on Filter Paper for Effective Oil-Water Separation in Highly Acidic, Alkaline, and Salty Environment

2015 ◽  
Vol 25 (33) ◽  
pp. 5368-5375 ◽  
Author(s):  
Jun-Bing Fan ◽  
Yongyang Song ◽  
Shutao Wang ◽  
Jingxin Meng ◽  
Gao Yang ◽  
...  
Keyword(s):  
Filter Paper ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

Micro–nano structural engineering of filter paper surface for high selective oil–water separation

Cellulose ◽  
2017 ◽  
Vol 24 (7) ◽  
pp. 2913-2924 ◽  
Author(s):  
Fang Zhang ◽  
Hao Ren ◽  
Lingling Shen ◽  
Guolin Tong ◽  
Yulin Deng
Keyword(s):  
Filter Paper ◽  
Structural Engineering ◽  
Water Separation ◽  
Paper Surface ◽  
Oil Water Separation ◽  
Oil Water

Facile fabrication of superhydrophobic filter paper with improved durability and water repellency

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Lizheng Sha ◽  
Chao Ma ◽  
Huifang Zhao ◽  
Supeng Qiu ◽  
Zhongyu Yan ◽  
...  
Keyword(s):  
Filter Paper ◽  
Separation Efficiency ◽  
Cellulose Nanofibrils ◽  
Water Repellency ◽  
Step Method ◽  
Water Contact ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Self Cleaning

Abstract Superhydrophobic surfaces have high potential in self-cleaning and oil-water separation applications. We developed a three-step method for the preparation of superhydrophobic filter paper. It involved citric acid (CA) pretreatment to activate cellulose fibers, coating with cellulose nanofibrils/functionalized silica (CNFs/m-SiO2) slurry to increase surface roughness, and grafting of hexadecyltrimethoxysilane (HDTMS) to enhance water resistance. The water contact angle (WCA) and siding angle (SA) of the prepared filter paper reached 151.5° and 7.5°, respectively. The results showed that, compared to the coated filter paper without the added CNFs, the coated paper with CNFs had higher retention of m-SiO2, thus roughness required for superhydrophobic surface was achieved. Further test under frequent abrasion and acid or alkali conditions showed that CA pretreatment improved the durability of superhydrophobic filter paper due to chemical crosslinking between the modified substrate and m-SiO2. Besides, the prepared superhydrophobic filter paper had outstanding self-cleaning property and high oil-water separation efficiency for various oil-water mixtures. Therefore, it is expected to be used for the treatment of oily wastewater.

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