The fluorine-free coating has excellent hydrophobic and oleophobic properties for porous cellulose-based materials

Nanofibrillated cellulose is obtained from cellulose resources (e.g., Natural cellulose, bacterial cellulose) and is deemed to be environmentally friendly, green, and inexhaustible. Accordingly, we reported an innovative method for fluorine-free water- and oil/grease-repellent surface based on porou...

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Bibliographic Details
Published in:Cellulose (London) 2021-07, Vol.28 (10), p.6133-6146
Main Authors: Du, Peng, Ding, Qijun, Zhao, Chuanshan, Jiang, Yifei, Han, Wenjia, Li, Xia
Format: Article
Language:English
Subjects:
Aqueous solutions
Bioorganic Chemistry
Cellulose
Ceramics
Chemistry
Chemistry and Materials Science
Chitosan
Composites
Contact angle
Fluorination
Fluorine
Glass
Natural Materials
Organic Chemistry
Original Research
Physical Chemistry
Polymer Sciences
Polyvinyl alcohol
Porous materials
Relative humidity
Sustainable Development
Vapor resistance
Water resistance
Water vapor
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Summary:Nanofibrillated cellulose is obtained from cellulose resources (e.g., Natural cellulose, bacterial cellulose) and is deemed to be environmentally friendly, green, and inexhaustible. Accordingly, we reported an innovative method for fluorine-free water- and oil/grease-repellent surface based on porous cellulose-based materials. In order to improve oil/grease resistance, sulfonated nanofibrillated cellulose (SNFC) was coated on the surface to fill the porous, the obtained paper was soaked in chitosan aqueous solution as the second layer. The-SNFC-chitosan-coated paper was applied with modified polyvinyl alcohol (MPVA) as the third layer to increase water resistance and water vapour transmittance. The experimental results showed 5.2 g/m 2 SNFC, 2.5 g/m 2 chitosan and 7% MPVA demonstrated excellent kit rating value of 12/12 (maximum grease resistance) (oil resistance contact angle is 103.93°), good water resistance (water contact angle is 108.6°) and high water vapour transmission rate (4.8 × 10 –14  g cm/cm 2  s Pa) under the condition of 90% relative humidity. This non-fluorinated and practical method is an excellent alternative to existing fluorinated materials, which will further promote the development of cellulose-based packaging. Graphic abstract
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-021-03959-8