Superhydrophobic Poplar Scrimber Via In Situ Synthesis of Cu₇Cl₄(OH)₁₀·H₂O Heterostructure Inspired by Pine Cone with Superultraviolet Resistance

Abstract

Sustainable wood-based materials with versatile functions such as ultraviolet resistance, superhydrophobicity, selfcleaning/antifouling capability, etc. have great potential to be used in building fields for replacing non-biodegradable fossil-based materials due to their facile preparation, biodegradability, and durability as well as the increasing concerns on environmental impact. Herein, pine-cone-shaped Cu 7 Cl 4 (OH) 10 •H 2 O nanoparticles were in situ synthesized by a hydrothermal process on a radial section of a poplar scrimber surface. As expected, the superhydrophobic function had been endowed to all three sections of the poplar scrimber surface, which exhibited excellent mechanical durability, desirable chemical stability, and splendid self-cleaning and antifouling capabilities. It should be noted that the modified poplar scrimber kept the superhydrophobic state even after 624 h of exposure to 340 nm ultraviolet (UV) irradiation, which could be ascribed to the unique hierarchical structure of the pine-cone-shaped Cu 7 Cl 4 (OH) 10 •H 2 O nanoparticles toward providing abundant voids for absorption of UV light. More importantly, a model of crystalline cellulose before and after compression was proposed to explain the improvement of physical and mechanical properties of poplar scrimber. This work will provide a new path for the superhydrophobic modification on wood-based engineering materials, which has potential to be applied in the industrial production of superhydrophobic wood scrimber to promote the sustainable development of timber resources.

Programmable and Shape–Color Synchronous Dual-Response Wood with Thermal Stimulus

“…Furthermore, SRW-TC and SRW exhibited high UV absorption ability (Figure S6), mainly due to the residual phenylpropane and phenolic hydroxyl groups in WS and carbonyl groups, 61 which enabled the SRW-TC to be potential engineering materials for shielding humans and the living environment from the adverse impact of solar radiation. 62,63 For pure vitrimers, the high transmittance and low haze might compromise privacy (Figure S7). Fortunately, the SRW-TC and SRW displayed high haze of 99.67% and 92.32% (Figure 2g), respectively, ensuring indoor privacy security, and their high light capture capability and long capture duration contributed to achieving enhanced discharge power output in light regulation and energy storage systems.…”

“…The resultant SRW-TC with thermochromic properties highlighted their promising applications as intelligent materials for light management and visualization. Furthermore, SRW-TC and SRW exhibited high UV absorption ability (Figure S6), mainly due to the residual phenylpropane and phenolic hydroxyl groups in WS and carbonyl groups, which enabled the SRW-TC to be potential engineering materials for shielding humans and the living environment from the adverse impact of solar radiation. , For pure vitrimers, the high transmittance and low haze might compromise privacy (Figure S7). Fortunately, the SRW-TC and SRW displayed high haze of 99.67% and 92.32% (Figure g), respectively, ensuring indoor privacy security, and their high light capture capability and long capture duration contributed to achieving enhanced discharge power output in light regulation and energy storage systems. , Due to the oriented cellulose nanofibrils along the z -direction yielding a discrete index variation in the y -direction (Figure S8a), the scattered light distribution of both SRW-TC and SRW (Figures S8b and S8c) revealed the highly anisotropic light scattering, which was facilitated to avoid light pollution, including glaring effects similar to transparent glass (Figure S8d).…”

Recent Advances in Superhydrophobic Surfaces and Applications on Wood

“…The prepared poplar reconstituted wood exhibited excellent mechanical durability, good chemical stability, and excellent self-cleaning and anti-fouling abilities. Jiang et al [ 84 ] synthesized pine-cone-shaped Cu 7 Cl 4 (OH)10·H 2 O nanoparticles in situ on the radial cross-section of poplar reconstituted wood surface by hydrothermal method. It provides a new pathway for the superhydrophobic modification of wood-based engineering materials, which has the potential to be applied to the industrial production of superhydrophobic wood structures and promote the sustainable development of wood resources.…”