Synthesis of Polyaniline (PANI) in Nano-Reaction Field of Cellulose Nanofiber (CNF), and Carbonization.

Yuki Kaitsuka,Noriko Hayashi,Hiromasa Goto,Tomoko Shimokawa,Eiji Togawa

doi:10.3390/polym8020040

Yuki Kaitsuka, Noriko Hayashi + Show 3 more

Open Access

https://doi.org/10.3390/polym8020040

Copy DOI

Abstract

Polymerization of aniline in the presence of cellulose nano-fiber (CNF) is carried out. We used dried CNF, CNF suspension, and CNF treated by enzyme and ultra-sonification to obtain polyaniline (PANI)/CNF as a synthetic polymer/natural nano-polymer composite. The polymerization proceeds on the surface of CNF as a nano-reaction field. Resultant composites show extended effective π-conjugation length because CNF as a reaction field in molecular level produced polymer with expanded coil structure with an aid of orientation effect of CNF. Possibility of PANI β-pleats structure in molecular level of PANI on the CNF is also discussed. SEM observation showed that fine structure is easily obtained by combining PANI with CNF. Carbonization of PANI/CNF allows production of nano-fine form with shape preserved carbonization (SPC).

Highlights

Cellulose nano-fiber (CNF) has been receiving attention because of interesting mechanical and optical properties [1,2,3,4]
Transparent property of CNF was applied for transparent electrodes, display, and bio-functional materials [5,6,7,8]
This paper reports synthesis, chemical structure, surface structure, electron spin resonance (ESR) measurements, electrical conductivity, and carbonization of the PANI/CNF composite

Summary

Introduction

Cellulose nano-fiber (CNF) has been receiving attention because of interesting mechanical and optical properties [1,2,3,4]. CNF has high adsorption property, and good adhesion between the fibers. Transparent property of CNF was applied for transparent electrodes, display, and bio-functional materials [5,6,7,8]. Super orientation effect of the CNF provides high mechanical strength and high thermal conductivity [9,10,11]. PANI can be prepared in the water media [12] with no necessity of inert gas. Advantages of simplicity and affinity with water in the synthesis of PANI allow combination with other materials for production of composites [13]

Methods

Discussion

Conclusion