Spawns Structure of Rod-Like ZnO Wrapped in Cellulose Nanofibers for Electromagnetic Wave Absorption

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

doi:10.1155/2017/6329072

Abstract

Spawns structure of rod-like ZnO wrapped in the cellulose nanofibers was successfully fabricated through a facile one-step hydrothermal method, and their electromagnetic wave absorption properties were investigated. The structure and properties of the composite aerogel were characterized. The enlarged morphology images showed that the as-prepared cellulose nanofiber/ZnO samples were spawns structure of rod-like ZnO wrapped in the cellulose nanofibers. The composite aerogel in a wax matrix exhibited excellent electromagnetic wave absorption performance over 2–18 GHz. The widest absorption bandwidth of 30 wt% contained with reflection loss values less than −10 dB was up to 12 GHz (6–18 GHz) at the thickness of 5.5 mm and the minimum reflection loss value reached −26.32 dB at 15.2 GHz when the thickness of the absorber was 3 mm.

Highlights

The nanosized metal oxides are becoming very potential materials due to their physicochemical properties and various applications in different fields [1, 2]
The spawns structure of rod-like zinc oxide (ZnO) wrapped in cellulose nanofibers (CNF) was prepared by one-step hydrothermal approach [19]. 100 mg CNF, 3 mmol Zn(NO3)2⋅6H2O, and 3 mmol C6H14N4 were put into deionized water (100 mL) with magnetic stirring for 10 min at room temperature
Spawns structure of ZnO rods wrapped in the CNF was formed

Summary

Introduction

The nanosized metal oxides are becoming very potential materials due to their physicochemical properties and various applications in different fields [1, 2]. ZnO-based materials had been focused on for a candidate for electromagnetic (EM) wave absorption due to their excellent dielectric properties [3, 4], semiconductive properties [5], selectable mechanical properties [6] for a typical structural absorber, and large-scale synthesis [7, 8]. The spawns structure of rod-like ZnO wrapped in CNF was successfully fabricated for EM wave absorption. Combining cellulose and ZnO rods into the spawns structure could be considered as an effective and competitive route to obtain lightweight composites with outstanding EM wave absorbing performance

Material and Methods

Results and Discussion

Conclusions