Hollow Mesoporous Microspheres Coating for Super-Hydrophobicity Wood with High Thermostability and Abrasion Performance

Abstract

Super-hydrophobic phenomena generally exist in nature, and wood can also obtain hydrophobicity by specific processing on the surface, being like the construction of microscale rough surface or decoration with low surface energy materials. In this research, the formation of hydrophobic layers on wood surface was investigated without breaking the wood’s original structure. The core-shell structure particles were prepared by penetrating orthosilicate and polystyrene into the hollow mesoporous microsphere structure with tetrahydrofuran. A wood sample was coated with polydimethylsiloxane (PDMS) resin layer to enhance the adhesion of nano and micron hollow mesoporous microsphere on its surface. According to the surface structure of super-hydrophobic subjects in nature, the nano and micron hollow mesoporous microsphere were sprayed with different ratios several times to form a hydrophobic surface. The water contact angle could reach 150°, revealing that the hydrophobic behavior of the nano and micron hollow mesoporous microsphere coating was achieved. The microstructures of wood samples were examined by the scanning electron microscopy, and the chemical functional groups were investigated by the Fourier transform infrared; both verified that the hydrophobic surface was successfully coated. The thermogravimetric examination revealed the improved thermal stability of the hydrophobic wood. The scratch test was used to measure the abrasion resistance of the nano and micron hollow mesoporous microsphere coatings on wood surface. It was suggested that the nano and micron hollow mesoporous microsphere coating was an effective method to fabricate extremely hydrophobic wood products.

Facile production of smart superhydrophobic nanocomposite for wood coating towards long‐lasting glow‐in‐the‐dark photoluminescence

“…Mechanical performance is a major feature that influences the durability of the coated wooden substrates. The key purpose of selecting PS as a coating matrix was to achieve a smooth photoluminescent surface with a highly transparent appearance and low roughness [ 55,56 ] Therefore, both scratching and tensile tests were investigated to inspect the mechanical performance of the coated luminescent films. Blank and coated woods were both subjected to the scratching test to inspect their scratching resistance.…”

Trends in Chemical Wood Surface Improvements and Modifications: A Review of the Last Five Years

“…Upon exposition to excessive heat, the wax trapped in the nanotube would melt to store thermal energy and later release this energy through crystallization. This kind of wood surface improvement strategy was also used by other workers to imbue wood photostability [108], molds resistance [109], selfhealing [110], thermal stability [111], and improved adhesion of UV-curing coatings [112].…”

“…In addition to high-wear resistance, the longevity of different superhydrophobic coatings were further improved through selfhealing [110,133], which allows to recover the micro-/nanoscale architecture following mild physical damage. Other elements of the protection of wood were also incorporated to superhydrophobic coatings including photostability [105,205,207,208], resistance to chemicals [88], and thermal stability [85,111]. Beside aspects related to the preservation of timber, some publications described superhydrophobic coatings with interesting new functionalities.…”

A Superhydrophobic, Antibacterial, and Durable Surface of Poplar Wood

“…However, the negative characteristics of wood, such as water absorption, UV degradation, and poor resistance to microbial action, have limited the application of wood [ 2 , 3 ]. Therefore, special treatment of the wood surface to obtain hydrophobicity is necessary to prolong the service life of wood and give greater application to the value of wood [ 4 , 5 , 6 , 7 , 8 , 9 ].…”

“…At the same time, considering that wood contains cellulose, hemicellulose, lignin, starch, sugar, and other components, it is a hotbed for microbial growth [ 31 , 32 ]. When the temperature and humidity and other environmental conditions are appropriate, these microorganisms will attach to the wood for a large number of growth and reproduction, resulting in wood decay, discoloration, and moldy, which influence the strength, toughness, and permeability of wood [ 6 , 33 , 34 , 35 ]. It also poses a threat to the life and health of the users [ 36 , 37 , 38 ].…”