Bio-inspired superhydrophilic coatings with high anti-adhesion against mineral scales

2019

Adv Funct Materials

Self Cite

The energy problem has been a matter of some concern worldwide over the past 20 years. On the opposite side of energy production, energy loss is another crucial problem of current energy due to the low efficiency of heat transfer from scale deposition. However, less attention has been paid on the further development of advanced antiscaling interfacial materials, which may provide promising ways to save energy by reducing scale fouling. Herein, the development of antiscaling strategies is summarized from the basic theories and fabrication methods to antiscaling interfacial materials with potential applications. First, the mechanism of scale formation and the corresponding effect on thermal conductivity are introduced. Second, the typical fabrication approaches of antiscaling interfacial materials are briefly described. Finally, the performance, potential applications, future challenges, and opportunities of the advanced antiscaling interfacial materials are comprehensively discussed.

Section: Advanced Antiscaling Interfacial Materialsmentioning

confidence: 99%

Section: Advanced Antiscaling Interfacial Materialsmentioning

confidence: 99%

Section: Superhydrophilic Surfacesmentioning

confidence: 99%

See 1 more Smart Citation

Advanced Antiscaling Interfacial Materials toward Highly Efficient Heat Energy Transfer

Meng

2019

Adv Funct Materials

Self Cite

“…[ 12 ] For example, hydrogel cilia were designed to bend in response to the change of pH or temperature, but the weak materials could only transport molecules and nanoparticles. [ 13–18 ] Liquid crystal cilia has long responsive time in light stimuli, which could move object slowly. [ 19,20 ] Magnetic responsive material endowed cilia real‐time remote operability, which could transport nano‐ and microparticles.…”

Section: Figurementioning

confidence: 99%

Bioinspired Transport Surface Driven by Air Flow

Zhang

Dai

et al. 2020

Adv Materials Inter

Self Cite

such gradients based driving force also face some limitations in transporting the macroscale object. Recently, motile ciliainspired microcone or nanorod that can be actuated to stroke or rotate under particular field, offers opportunities toward unidirectional transportation. [12] For example, hydrogel cilia were designed to bend in response to the change of pH or temperature, but the weak materials could only transport molecules and nanoparticles. [13-18] Liquid crystal cilia has long responsive time in light stimuli, which could move object slowly. [19,20] Magnetic responsive material endowed cilia realtime remote operability, which could transport nano-and microparticles. [21-23] Furthermore, our previous work has confirmed that artificial motile microcilia with anisotropic structure can directionally transport centi-scale hydrogel slice. [24] Even so, a great question still lingered in our mind: can we offer a complementary strategy to realize the function of macroscale object transport by applying a static anisotropic microcilia structure? Mucus and sputum full of bacteria and toxic particles can be directionally transported from the lung toward the larynx. Asymmetric stroke of tracheal cilia [25] is not the only driving factor, the air flow generated by cough can also have a strong propulsion to the mucus gel. [26] Previous studies have proved that our breath has positive effect on the antigravity transport of mucus gel on the lubricate periciliary layer of trachea. [27] Such phenomenon cannot happen on a nonstructured surface, the anisotropic structure may also play an important role in upward transporting and prevention of downward sliding. Herein, we materialized this idea by building artificial microcilia arrays combined with air-blowing device. The anisotropic microcilia arrays were submerged in a thin water layer, and a parallel air flow were set on the water to simulate the trachea cilia structure. We successfully achieved a directional transportation of a hydrogel slice along the microcilia tilt direction in the air flow by employing such artificial microcilia device. By measuring the friction between the horizontal hydrogel slice and tilted microcilia, we proved that the anisotropic friction of tilted microcilia could provide the directional transport capability. Furthermore, incorporating cobalt nanoparticles into the elastic microcilia promotes magnetic manipulation of the transport direction of the solid object under a fixed air source. The magnetically controllable unidirectional macroscale transport system would benefit fundamental research of anisotropic surface and provide new prospects in practical mass transportation by utilization of static interfacial anisotropy.

“…However, the inevitable leaching, potential bacteria resistance, and bio‐toxicity from nontarget species may severely damage the marine environment and disrupt the marine ecological order . Bio‐inspired functional materials have thrived in the last decades especially in the applications with respect to interfacial chemistry comprising antibiofouling, corrosion resistance, self‐cleaning, self‐repairing, and superhydrophobic surfaces . As confirmed by scientists, the natural mucous membranes of fishes are mainly constituted by mucopolysaccharides, protides, and lipids presenting negative surface potential, which play indispensable roles in resisting microbial invasion (lies in both antiadhesion and antibacteria), reducing the friction and sustaining osmotic pressure .…”

mentioning

confidence: 99%

Negatively Charged Carbon Nanodots with Bacteria Resistance Ability for High‐Performance Antibiofilm Formation and Anticorrosion Coating Design

Zhu

et al. 2019

Small

Multifunctional coatings, especially those with simultaneous antibiofilm formation and anticorrosion properties are of great significance for the marine industry. Inspired by the function of fish mucus of blackhead fish, a biological epidermal secretion with negative surface potential that protects blackhead fish from colonization of microorganisms, a concept is introduced to use negatively charged carbon nanodots (CDs) as a secure and economical dual‐functional additive to prepare protective coatings. The prepared CDs with strong negative surface potential initiate robust antibiofilm formation (antiadhesion and antibacteria) and anticorrosion properties (about 60 days' durability in seawater) of polymeric coatings. The incorporated CDs with negative surface potential take effect in the following ways: 1) suppressing bacterial adhesion by virtue of strong electrostatic repulsion; 2) sterilizing anchored bacteria via destroying bacterial cell walls; 3) impeding electron ejection from the metallic surface; and 4) blocking aggressive species (H2O and O2) by narrowing the microchannels. This work provides a new train of thought propelling the development of potential materials for industrial and engineering applications.