Functionalized porous microparticles of nanofibrillated cellulose for biomimetic hierarchically structured superhydrophobic surfaces

Mertaniemi, Henrikki; Laukkanen, Antti; Teirfolk, J.-E.; Ikkala, Olli; Ras, Robin H. A.

doi:10.1039/c2ra00020b

Cited by 62 publications

(40 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In another example, cellulose has been exploited as a nanoscale coating for the fabrication of superhydrophobic papers by mimicking the lotus-leaf hierarchical surface topography, using porous structured microparticles of surface modified nanofibrillated cellulose (NFC) [157]. The microparticles were formed by spray drying of solvent-based NFC, followed by quick drying and modification by fluorinated trichlorosilane surfactant.…”

Section: Nanoscale Surface Structuring Towards (Super-)hydrophobic Pamentioning

confidence: 99%

Bio-Based Coatings for Paper Applications

2015

View full text Add to dashboard Cite

Abstract:The barrier resistance and wettability of papers are commonly controlled by the application of petroleum-based derivatives such as polyethylene, waxes and/or fluor-derivatives as coating. While surface hydrophobicity is improved by employing these polymers, they have become disfavored due to limitations in fossil-oil resources, poor recyclability, and environmental concerns on generated waste with lack of biodegradation. Alternatively, biopolymers including polysaccharides, proteins, lipids and polyesters can be used to formulate new pathways for fully bio-based paper coatings. However, difficulties in processing of most biopolymers may arise due to hydrophilicity, crystallization behavior, brittleness or melt instabilities that hinder a full exploitation at industrial scale. Therefore, blending with other biopolymers, plasticizers and compatibilizers is advantageous to improve the coating performance. In this paper, an overview of barrier properties and processing of bio-based polymers and their composites as paper coating will be discussed. In particular, recent technical advances in nanotechnological routes for bio-based nano-composite coatings will be summarized, including the use of biopolymer nanoparticles, or nanofillers such as nanoclay and nanocellulose. The combination of biopolymers along with surface modification of nanofillers can be used to create hierarchical structures that enhance hydrophobicity, complete barrier protection and functionalities of coated papers. OPEN ACCESSCoatings 2015, 5 888

show abstract

Section: Nanoscale Surface Structuring Towards (Super-)hydrophobic Pamentioning

confidence: 99%

Bio-Based Coatings for Paper Applications

2015

View full text Add to dashboard Cite

show abstract

“…In the present case, because silica particles are composed of a large number of crystals, the roughness of its surface is high . Generally, high roughness is a vitally important factor in achieving a superhydrophobic surface . Hence, the modified nylon cloth has a higher WCA than that of the original one.…”

Section: Resultsmentioning

confidence: 89%

Superhydrophobic nylon cloth coated with modified silica used for oil–water separation

Zhang

2018

Env Prog and Sustain Energy

View full text Add to dashboard Cite

The handling of oil spill accidents is a global challenge to prevent further deterioration of our environment. Oil–water separation membrane has become a great choice to settle the emergency accidents. Due to the strong organization, resistance to wear and tear as well as easy to clean, nylon cloth is firstly chosen as a substrate in our study. Silica was used as the coating material, which was modified by methyltrichlorosilane. The modification made silica particles hydrophobic. After the coating of modified silica particles, the surface of the nylon cloth became much rougher than before. The rough surface improved the hydrophobicity of nylon cloth. The water contact angle (WCA) reached 150.3°. On the other hand, oil could be separated from oil–water mixture rapidly through this membrane without any extra force. On the whole, the above properties make the nylon cloth coated with modified silica particles a more suitable material for oil–water separation in oil spill accidents. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13051, 2019

show abstract

“…When put in water, an interesting mirror-reflection phenomenon caused by a thin layer of trapped air (plastron) (Mertaniemi, Laukkanen, Teirfolk, Ikkala, & Ras, 2012) was observed at the water-membrane interface (Fig. 2c).…”

Section: Figmentioning

confidence: 94%