Polysiloxane/multiwalled carbon nanotubes nanocomposites and their applications as ultrastable, healable and superhydrophobic coatings

Li, Bucheng; Zhang, Junping

doi:10.1016/j.carbon.2015.05.103

Cited by 69 publications

(34 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…24,25 In practical environments, especially when a surface is used in the open air, long term exposure to UV, high air humidity and large temperature differences, must be taken into consideration when considering the stability of the surface. Durable superhydrophobic coatings have been reported recently, 26 such as acrylic polyurethane based coating, 27 textured surface obtained by chemical etching, 28,29 surfaces template from innately microstructured hydrogel matrix, 30 block-copolymer-based thin-film patterning, 31 combination of rodlike palygorskite and organosilanes via spray-coating, 32 fluorine-free polysiloxane/multiwalled carbon nanotubes, 33 titanium dioxide materials with special wettability, 34 or various coatings fabricated on fabrics/sponges/cotton. [35][36][37][38][39][40] However, most of the reported surfaces are not durable enough, as they can only resist abrasion against wipes, 28 fine sandpaper (e.g., 800, 1000, 2000 grid), mild droplets/sand impinging, 30,31 or were easily disabled after a short distance (i.e., less than 5 m) of abrasion.…”

Section: Introductionmentioning

confidence: 99%

Designing durable and flexible superhydrophobic coatings and its application in oil purification

Wang

Xiong

et al. 2016

J. Mater. Chem. A

View full text Add to dashboard Cite

Lotus-inspired superhydrophobic coatings are usually mechanically weak and lack durability, this hinders their practical applications. A suspension that can be treated on various materials in any size and shape to form a mechanically durable superhydrophobic coating is developed, which retains water repellent properties after multiple cycles of abrasion, blade scratching, tape-peeling, repeated deformation, a series of environmental tests and recycling. Based on its superhydrophobicity under oil, two highly efficient systems were developed for oil purification -stirring and inverted cone systems. Small water drops converge on the coated surface that was immersed in oil through velocity-controlled stirring, or designing an inverted cone superhydrophobic surface under oil to collect water drops spontaneously. This coating can be readily used for practical applications to make a durable superhydrophobic coating that functions either in air or oils.

show abstract

Section: Introductionmentioning

confidence: 99%

Designing durable and flexible superhydrophobic coatings and its application in oil purification

Wang

Xiong

et al. 2016

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

“…However, most of superwetting materials are inherently not durable enough to meet practical applications, resulting in the loss of their superwetting properties and recoverability. We have developed some durable superhydrophobic or superoleophobic coatings based on organosilanes by forming crosslinking points in the coatings, and by enhancing the interaction between the coatings and substrates ,, . iii) Only limited types oils with high viscosity can be absorbed and the absorbency of superwetting 3D porous materials decreased obviously after used for one time, which means low collecting efficiency for highly viscous oils and low reusability of the materials.…”

Section: Discussionmentioning

confidence: 99%

“…Accordingly, one of the great challenges in the field of superhydrophobic materials is how to enhance their mechanical stability. To overcome this fatal defect, stable superhydrophobic surfaces have been fabricated on various substrates by spray‐coating homogeneous suspensions containing fluorine‐free polysiloxane and MWCNTs (Figure ) . The coatings show negligible change in the water CA and maintain low sliding angle after various harsh stability tests, e. g., intensive sand abrasion from a height of 300 cm.…”

Section: Removal Of Floating and Underwater Insoluble Organic Liquidsmentioning

confidence: 99%

See 1 more Smart Citation

Removal of Organic Pollutants from Water Using Superwetting Materials

Zhang

Wang

2017

The Chemical Record

Self Cite

View full text Add to dashboard Cite

The frequent occurrence of water pollution accidents and the leakage of organic pollutants have caused severe environmental and ecological crisis. It is thus highly imperative to find efficient materials to solve the problem. Inspired by the lotus leaf, superwetting materials are receiving increasing attention in the field of removal of organic pollutants from water. Various superwetting materials have been successfully generated and integrated into devices for removal of organic pollutants from water. On the basis of our previous work in the field, we summarized in this account the progress of removal of (1) floating and underwater insoluble, (2) emulsified insoluble, and (3) both insoluble and soluble organic pollutants from water using superwetting materials including superhydrophobic & superoleophilic materials, superhydrophilic & underwater superoleophobic materials, and materials with controllable wettability. The superwetting materials are in the forms of 2D porous materials, 3D porous materials and particles, etc. Finally, the current state and future challenges in this field are discussed. We hope this account could shed light on the design of novel superwetting materials for efficient removal of organic pollutants from water.

show abstract

“…In fact, for preparation of superhydrophobic coatings, fluorinated chemicals are not essential . Alkyl groups such as methyl, ethyl, and hexadecyl are sufficient to make microtextured surfaces superhydrophobic. However, waterborne nonfluorinated superhydrophobic coatings are very rare.…”

Section: Introductionmentioning

confidence: 99%

Waterborne Nonfluorinated Superhydrophobic Coatings with Exceptional Mechanical Durability Based on Natural Nanorods

Zhang

Gao

et al. 2017

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

Thousands of superhydrophobic materials including coatings, 3D porous sponges, and particles have been prepared in the past two decades. [3] Superhydrophobic coatings have wide potential applications in many fields, e.g., self-cleaning surfaces, oil/water separation, anticorrosion, water collection, and directional water transport, etc. [4] However, it is still very challenging to move superhydrophobic coatings toward real-world applications. [5] The practical applications of superhydrophobic coatings are hindered by some issues, such as harmful volatile organic compounds (VOCs) as solvents, fluorinated chemicals, low mechanical durability, complicated methods, and expensive building blocks, etc.Superhydrophobic coatings are in most cases prepared by the combination of rough surface microstructure and materials of low surface energy. [2b] Various chemical and physical methods are frequently used to construct the surface microstructures like micro-/nanopillars, nanocones, microfibers, and nanofilaments, [4a,6] whereas the abundant natural nanomaterials are often ignored. On the other hand, VOCs like alkanes, alcohols, and arenes are frequently used as solvents to dissolve or disperse the materials of low surface energy. The VOCs make it unfavorable or even impossible for large scale production and applications of superhydrophobic coatings because of environmental pollution, safety risks, and high costs. Compared with VOCs, water is a green solvent, but is seldom used as the solvent for preparation of superhydrophobic coatings. This is because materials of low surface energy often cannot dissolve or disperse very well in water. Waterborne superhydrophobic coatings are receiving growing attention recently aiming at practical applications, and there are a few documented waterborne superhydrophobic coatings. [7] Lin and co-workers found that lyophobic nanoparticles, fluorinated alkyl silane, and fluorocarbon surfactant can form a stable dispersion in water, suitable for preparing superamphiphobic coatings. [8] However, most of the reported waterborne superhydrophobic coatings are only partly waterborne, and VOCs are still used in some of the steps. In addition, harmful reagents like ammonia and acids are often used to promote the reactions or enhance the dispersibility of nanoparticles in these Practical applications of superhydrophobic coatings are hindered by some issues, such as harmful chemicals, low mechanical durability, complicated methods, and expensive building blocks, etc. This study reports preparation of waterborne nonfluorinated superhydrophobic coatings with exceptional mechanical durability based on natural nanorods, palygorskite (PAL). A poly urethane (PU) aqueous solution and the homogeneous methyl polysiloxane modified PAL (PAL@MPOS) suspension composed of methyltrimethoxysilane and the PAL nanorods in water are layerbylayer spraycoated onto glass slides for two times with PU as the adhesive layer. The PAL@MPOS suspensions and the superhydrophobic PU/PAL@MPOS coatings are studied using var ious...

show abstract

Polysiloxane/multiwalled carbon nanotubes nanocomposites and their applications as ultrastable, healable and superhydrophobic coatings

Cited by 69 publications

References 54 publications

Designing durable and flexible superhydrophobic coatings and its application in oil purification

Designing durable and flexible superhydrophobic coatings and its application in oil purification

Removal of Organic Pollutants from Water Using Superwetting Materials

Waterborne Nonfluorinated Superhydrophobic Coatings with Exceptional Mechanical Durability Based on Natural Nanorods

Contact Info

Product

Resources

About