Superhydrophobicity, Microwave Absorbing Property of NiFe2O4/Wood Hybrids under Harsh Conditions

Qiufang Yao,Huanhuan Zheng,Zhongqing Ma,Qingfeng Sun,Chunde Jin

doi:10.1155/2015/761286

Abstract

Magnetic NiFe2O4nanoparticles were successfully deposited on the wood surface via a hydrothermal process at 70°C. The surface of the as-prepared magnetic NiFe2O4/wood hybrids (MWHs) was covered by spherical-like NiFe2O4particles with an average size of 50 nm. MWH exhibited the thermostability, microwave absorbability, and superparamagnetism with saturation magnetization (Ms) of 1.79 emu·g−1. With further modification by 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (FAS-17), MWH expressed superhydrophobic performances with a water contact angle of 158°. Its superparamagnetism stably remained under harsh conditions after chemical solutions corrosion and physical frozen test.

Highlights

With superior properties such as improved thermal, mechanical, and dimensional stability, inorganic nanoparticles/wood hybrids have attracted significant interest in recent years [1, 2]
A thin coating of inorganic nanoparticles deposited on wood surface has been demonstrated to lower the rate of moisture sorption [3]
The wood embedded with magnetic properties would be a potential for indoor electromagnetic wave absorber, antistatic property, and heavy metal adsorption, which may be a multifunctional material with woody and magnetic characteristics [7,8,9]

Summary

Introduction

With superior properties such as improved thermal, mechanical, and dimensional stability, inorganic nanoparticles/wood hybrids have attracted significant interest in recent years [1, 2]. A thin coating of inorganic nanoparticles deposited on wood surface has been demonstrated to lower the rate of moisture sorption [3]. This is attributed to synergistic effects resulting from the physical or chemical interactions between the inorganic and wood components. Some interesting properties, such as UV resistance, fire resistance, or superhydrophobic performances, were granted to wood by surface deposition of nanometer-sized inorganic particles, such as SiO2 [4], TiO2 [5], and ZnO [6]. There were rare researches focused on the exploration of magnetic nanoparticles deposited on wood surface. The superhydrophobic magnetic wood specimens were evaluated as well in harsh condition

Material and Methods

Results and Discussion

H Dehydration O Si OH

Conclusions