Biomimetic taro leaf-like films decorated on wood surfaces using soft lithography for superparamagnetic and superhydrophobic performance

Abstract

The surfaces of plants represent multifunctional interfaces between the organisms and the environment. In this paper, biomimetic taro leaf-like structures with superparamagnetic and superhydrophobic performances were exactly copied on the wood surface through the soft lithography to improve the wood properties. Fe 3 O 4 nanoparticles were mixed into poly(dimethylsiloxane) PDMS suspensions to obtain Fe 3 O 4 /PDMS suspensions that commonly endow coats magnetic and microwave absorption properties, which were then cast onto the wood surface and packaged by PDMS stamps replicated from fresh taro leaves. Fe 3 O 4 /PDMS films, which coexisted superhydrophobic surface and superparamagnetic property, were created on the wood surface after the being dried and stamps were peeled off. The as-prepared wood surface exhibited unique taro leaf-like micro-and nanostructures, microwave absorption, superparamagnetism performances with maximum saturation magnetization (M s ) of 22.9 emu g -1 and superior static superhydrophobicity with a water contact angle of 152°± 2°. This research may provide a feasible pathway for constructing naturally biomorphic structures on the wood surface with tailored functions.

The properties of fibreboard based on nanolignocelluloses/CaCO3/PMMA composite synthesized through mechano-chemical method

“…These composites generally exhibit superior stiffness, strength, and heat distortion temperatures with respect to unreinforced polymers 20 . Nanoparticles such as nanometric CaCO 3 21 , SiO 2 22 , Fe 3 O 4 23 , TiO 2 24 , and ZnO 25 particles have been used to prepare nanocomposites. Among the various reinforcing materials, CaCO 3 is attractive because of its low cost.…”

Facile preparation of superhydrophobic wood surfacesviaspraying of aqueous alkyl ketene dimer dispersions

“…22 Others applied small-scale structure onto a hydrophobic PDMS coating. [23][24][25] These modied surfaces of intrinsically hydrophilic wood substrate reached WCA above 150 but were prepared using complex or time-consuming processes. Most of these procedures consist of two or more production steps, including at least one immersion or autoclave treatment hardly suitable for continuous and efficient large scale production.…”

Preparation of High Mechanical Performance Nano-Fe3O4/Wood Fiber Binderless Composite Boards for Electromagnetic Absorption via a Facile and Green Method

“…The bands at 1260 and 1060 cm −1 were assigned to C–O–C (aryl-alkyl ether linkage) stretching vibration and C–O (alkoxy) stretching vibration, respectively [ 24 ]. The absorption peak at 561 cm −1 was attributed to Fe–O stretching vibration [ 25 , 26 ], which confirmed that the Fe 3 O 4 NPs were mixed in the fiber. The characteristic peaks of fiber were not weakened or disappeared, whereas the characteristic peaks of metal-oxide became strengthened.…”