Shelter Forest Inspired Superhydrophobic Flame‐Retardant Composite with Root‐Soil Interlocked Micro/Nanostructure Enhanced Mechanical, Physical, and Chemical Durability

Abstract

The heat accumulation caused by the high power consumption of continuously upgrading electronic devices puts forward more requirements for the adaptability and durability of the flame retardant materials. Herein, inspired by the soil reinforcement effect of the shelter forest roots nearby the river and shoal, a superhydrophobic flame-retardant ethylene-vinyl acetate (EVA)/ aluminum trihydroxide (ATH) composite with root-soil interlocked micro/ nanostructure (MEA/PGCC) is prepared by combining the micro-extrusion compression molding and spray coating. The homogeneously dispersed ATH and the EVA with sufficient mechanical strength provide durability for the long-term work of the MEA/PGCC composite. The root-soil interlocked micro/nanostructure provides robust superhydrophobicity with a water contact angle of 156 ± 1.0° and a rolling angle of 4 ± 1.0° for the MEA/PGCC composite which is beneficial to improve acid and alkali tolerance, thermic resistance, and de-icing performance. The synergism of interface and surface function prominently improves the flame retardancy of the MEA/PGCC composite, which presents a limit oxygen index of 42%, and remarkable reduction in peak heat release rate of 64%, total heat release of 23%, and peak smoke production rate of 47%. The proposed method is a promising candidate for the mass production and practical application of the superhydrophobic flame retardant composite.

Efficient Fabrication of Micro/Nanostructured Polyethylene/Carbon Nanotubes Foam with Robust Superhydrophobicity, Excellent Photothermality, and Sufficient Adaptability for All‐Weather Freshwater Harvesting

“…The homogeneously dispersed CNTs forms an interconnected thermal path in the PE skeleton (Figure 2d), indicating that the effect of transient normal stress generated in the process of cyclical releasing and compressing of the ERE strengthens the mass/heat transfer and the dispersion effect of polymer composites (Figure S3, Supporting Information). [38] Under various concentrations of CNTs, the pore size distribution changes little and is primarily concentrated in 0-15 µm (Figure 2e), which further proved that the addition of CNTs nanofillers does not affect the interconnected open-cell structure of the PCs foams.…”

Highly Efficient Photothermal Icephobic/de‐Icing MOF‐Based Micro and Nanostructured Surface

“…c) Comparison of icing delay time between our MOF‐M 250 NS and other recently reported ice‐delayed surfaces (Ref. [7, 22, 28, 31–40]). d,e) COMSOL simulations of a water droplet icing process on the surface of MOF‐M 250 NS d) and copper sheet e).…”

“…Furthermore, MOF-M 250 NS offers the longest icing delay time (Figure 3c) among the recently reported ice nuclear delayed surface. [7,22,28,[31][32][33][34][35][36][37][38][39][40] More interestingly, the water droplet on the MOF-M 250 NS surface maintains a spherical shape before and after icing. It indicates that the hierarchical MOF micro-nanostructures maintain the droplet in a stable Cassie state throughout the extended icing process.…”

Silica Nanoparticle/TPU Coating Imparts Aramid with Puncture Resistance and Anti-corrosion for Personal Protection

“…These surfaces typically comprise a combination of micro- and nanoscale rough structures along with hydrophobic materials possessing low surface energy . Moreover, nanoparticles such as silicon carbide, silicon dioxide, titanium dioxide, and carbon nanotubes are commonly utilized in constructing the rough structures for superhydrophobic coatings, owing to their large specific surface area and favorable dispersion properties. – As research on superhydrophobic surfaces advances, an increasing array of functional nanoparticles has been incorporated into these surfaces to fulfill specific properties and broaden their scope of application. PTFE represents a promising protective material due to its exceptional resistance to strong acid and alkali corrosion as well as its low surface tension characteristics.…”