A simple, one-step hydrothermal approach to durable and robust superparamagnetic, superhydrophobic and electromagnetic wave-absorbing wood.

Hanwei Wang,Yipeng Chen,Qiufang Yao,Ye Xiong,Bitao Fan,Chao Wang,Qingfeng Sun,Chunde Jin

doi:10.1038/srep35549

Abstract

In this work, lamellar MnFe2O4 was successfully planted on a wood surface through the association of hydrogen bonds via the one-pot hydrothermal method. Simultaneously, the fluoroalkylsilane (FAS-17) on the surface of the MnFe2O4 layer formed long-chain or network macromolecules through a poly-condensation process and provided a lower surface energy on the wood surface. The MnFe2O4/wood composite (FMW) presented superior superparamagnetism, superhydrophobicity and electromagnetic wave absorption performance. The results indicated a saturation magnetization of the FMW with excellent superparamagnetism of 28.24 emu·g−1. The minimum value of reflection loss of the FMW reached −8.29 dB at 16.39 GHz with a thickness of 3 mm. Even after mechanical impact and exposure to corrosive liquids, the FMW still maintained a superior superhydrophobicity performance.

Highlights

In this work, lamellar MnFe2O4 was successfully planted on a wood surface through the association of hydrogen bonds via the one-pot hydrothermal method
Bamboo, wood and various other natural organic materials are usually considered good candidates as host materials for composites, and as-prepared composites can still retain their special morphology while obtaining some unique properties[1,2,3,4,5]
A superhydrophobic wood surface can be prepared by two approaches: forming a layer of inorganic particles on the wood surface to create a rough structure or chemically modifying a rough surface with a low surface free energy[25,26]

Summary

Introduction

Lamellar MnFe2O4 was successfully planted on a wood surface through the association of hydrogen bonds via the one-pot hydrothermal method. We employed a simple one-step hydrothermal method for the growth of MnFe2O4 on a wood surface, and the as-prepared MnFe2O4/wood composite exhibited superior superparamagnetism, superhydrophobic and electromagnetic wave absorption properties. The analysis of the FT-IR spectra of the FMW exhibited the existence of FAS-17 and hydrogen bonds between the wood surface and the MnFe2O4.

Results

Conclusion