Functionalized superhydrophobic biomimetic chitosan-based films

Song, Wenlong; Gaware, Vivek S.; Rúnarsson, Ögmundur Vidar; Másson, Már; Mano, João F.

doi:10.1016/j.carbpol.2010.01.041

Cited by 67 publications

(48 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another very interesting study published quite recently deals with the synthesis of a silyl chitosan derivative, namely 3,6-O-di-tertbutyldimethyl silyl chitosan (SC), which was used to prepare extremely water-repellent films in the whole pH range, using a phase-separation method that gave rise to a topography characterized by a three-level hierarchical roughness organization (Song et al 2010). This synthesis involved two steps, viz.…”

Section: Chemical Modificationsmentioning

confidence: 99%

“…Starch esters, the most common starch derivatives that have been produced through the years either by esterification or transesterification, are usually (Song et al 2010) characterized by a higher hydrophobic character then their precursor as a consequence of the reduction in their surface energy (particularly its polar component) associated with the replacement of hydroxyl groups by less polar ester moieties (Aburto et al , 1999Geng et al 2010;Namazi and Dadkhah 2010;Thiebaud et al 1997;Thielemans et al 2006).…”

Section: Chemical Modificationsmentioning

confidence: 99%

See 1 more Smart Citation

Turning polysaccharides into hydrophobic materials: a critical review. Part 2. Hemicelluloses, chitin/chitosan, starch, pectin and alginates

2010

View full text Add to dashboard Cite

This survey constitutes the second part of a comprehensive review, whose purpose is to provide a reasoned perspective on the field related to the preparation of new polysaccharide-based hydrophobic materials by scrutinizing the actual state of its art. After dealing with the major topic of cellulose hydrophobization in the first part, attention is now turned to the other important members of the polysaccharide families, namely hemicelluloses, chitin/chitosan, starch, pectin and alginates. Publications dealing with both chemical and physical treatments aimed at inducing a substantial increase in the hydrophobic character of their surface are critically examined within the broader context of the elaboration of novel materials based on renewable resources as a viable alternative to their fossil-based counterparts.

show abstract

Section: Chemical Modificationsmentioning

confidence: 99%

Section: Chemical Modificationsmentioning

confidence: 99%

Turning polysaccharides into hydrophobic materials: a critical review. Part 2. Hemicelluloses, chitin/chitosan, starch, pectin and alginates

2010

View full text Add to dashboard Cite

show abstract

“…Distinct classes of materials have been employed to produce superhydrophobic surfaces that mimic the structure of lotus leaves, such as natural polymers [32,33]; synthetic polymers [34][35][36]; synthetic organic, inorganic, or hybridized organic-inorganic materials [37][38][39][40][41]; and metals [42][43][44].…”

Section: Superhydrophobic Surfaces Inspired By the Lotus Leafmentioning

confidence: 99%

“…Regarding polymeric surfaces, superhydrophobic poly(l-lactic acid) (PLLA) with WCA >150 • was prepared by a simple and low-cost phase inversion method [32,45]. It is clear that in these PLLA surfaces, besides the roughness at the micrometer level, the individual papillaelike structures exhibit roughness at the nanolevel ( Figure 10.3).…”

Section: Superhydrophobic Surfaces Inspired By the Lotus Leafmentioning

confidence: 99%

“…Chitosan has been proposed for a series of biomedical applications because of its biocompatibility, processability, and possibility of chemical modification [46,47]. Chitosan films exhibiting superhydrophobicity over the whole pH range were also produced by a phase separation method [32]. The roughness of such films exhibited three levels of hierarchical organization, as shown in Figure 10.4.…”

Section: Superhydrophobic Surfaces Inspired By the Lotus Leafmentioning

confidence: 99%

See 1 more Smart Citation

Surfaces with Extreme Wettability Ranges for Biomedical Applications

Song¹,

Alves²,

Mano³

2012

Biomimetic Approaches for Biomaterials Development

Self Cite

View full text Add to dashboard Cite

Learning from nature has become a shortcut to synthesize new materials or to improve their properties for different applications [1][2][3][4][5][6]. In particular, surfaces with extreme wettability found in nature have attracted great interest because they can find applications in industry, agriculture, and daily life [7,8]. Among them, superhydrophobic surfaces, that is, those that show a water contact angle (WCA) >150 • and a sliding angle <5 • have been especially investigated in recent years [9] because of the foreseeable applications in biomedicine and tissue engineering. One can find this unique property in many plants or insects, as shown in Figure 10.1, such as in lotus leaves, legs of water strider, butterfly wings, and moth or mosquito eyes [10-13]. The lotus leaf, the most well-known example of superhydrophobicity in nature, also presents the so-called self-cleaning effect, as reported by Barthlott and Ehler in 1977 for the first time [14]. Furthermore, surface analysis indicates that the lotus leaf surface is full of micropapillae and that nanoscale structures can be observed on each papilla. These hierarchical micro-and nanostructures and the covered thin layer of biowax are responsible for the superhydrophobicity of the lotus leaves. This kind of surface is also called isotropic superhydrophobic surface because of the isotropy of the surface roughness geometry. Anisotropic superhydrophobic surfaces can also be found in nature, for example, a wheat leaf or a butterfly wing, in which wettability changes with the direction [15,16]. These surfaces could be widely used for designing new microfluidic [17] and bioanalyzing devices that require directional (2D) and spatial (3D) variations of controlled wettability, adhesive force, and friction force. Regarding the superhydrophobic cases of insects in nature, and taking the water strider as an example, the ability to ''walk'' on water surface has been attributed to the combined action of the covered biowax and the nano/microscale hierarchical structures of the small hairs (setae) on the legs [18,19].From the previous examples taken from nature, it is clear that the special hierarchical micro-and nanostructures are the determinants of the superhydrophobicity of a surface. Because the adhesion of cells or proteins on a surface is also affected by the surface wettability, these special hierarchical structures can be foreseen to Biomimetic Approaches for Biomaterials Development, First Edition. Edited by João F. Mano.

show abstract

Superhydrophobic Polymers

Wolfs

Darmanin

2013

Encyclopedia of Polymer Science and Technology

View full text Add to dashboard Cite

Antiwetting materials have been widely studied because of their potential applications in several fields. Polymeric materials are of special interest because they provide advantages including ease of processability and cost. This article introduces basic wetting theories and overviews the main techniques to produce superhydrophobic polymers, such as templating, molding, self‐assembly, soft lithography, layer‐by‐layer deposition, precipitation and crystallization, electrospinning, and electrochemical polymerization. For each method, representative examples as well as practical advantages and disadvantages are also presented.

show abstract

Functionalized superhydrophobic biomimetic chitosan-based films

Cited by 67 publications

References 20 publications

Turning polysaccharides into hydrophobic materials: a critical review. Part 2. Hemicelluloses, chitin/chitosan, starch, pectin and alginates

Turning polysaccharides into hydrophobic materials: a critical review. Part 2. Hemicelluloses, chitin/chitosan, starch, pectin and alginates

Surfaces with Extreme Wettability Ranges for Biomedical Applications

Superhydrophobic Polymers

Contact Info

Product

Resources

About