Toward high-performance nanofibrillated cellulose/aramid fibrid paper-based composites via polyethyleneimine-assisted decoration of silica nanoparticle onto aramid fibrid

Fan Xie; Jingjing Bao; Longhai Zhuo; Yongsheng Zhao; Wanbin Dang; Lianmeng Si; Cheng Yao; Meiyun Zhang; Zhaoqing Lu

doi:10.1016/j.carbpol.2020.116610

Toward high-performance nanofibrillated cellulose/aramid fibrid paper-based composites via polyethyleneimine-assisted decoration of silica nanoparticle onto aramid fibrid

Carbohydr Polym. 2020 Oct 1:245:116610. doi: 10.1016/j.carbpol.2020.116610. Epub 2020 Jun 11.

Authors

Fan Xie¹, Jingjing Bao¹, Longhai Zhuo¹, Yongsheng Zhao², Wanbin Dang¹, Lianmeng Si¹, Cheng Yao¹, Meiyun Zhang³, Zhaoqing Lu⁴

Affiliations

¹ College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Key Laboratory of Paper Based Functional Materials of China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an, 710021, China.
² Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an, 710072, China.
³ College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Key Laboratory of Paper Based Functional Materials of China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an, 710021, China. Electronic address: myzhang@sust.edu.cn.
⁴ College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Key Laboratory of Paper Based Functional Materials of China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an, 710021, China. Electronic address: luzhaoqing302@163.com.

PMID: 32718657
DOI: 10.1016/j.carbpol.2020.116610

Abstract

Flexible paper-based nanocomposites dielectrics are of crucial importance in electrical insulation and advanced electrical power systems. In this work, a novel nanofibrillated cellulose/aramid fibrid (NFC/AF) composite was fabricated by vacuum-assisted filtration process. In order to improve the dielectric property of the composites, carboxylated nano-SiO₂ was chemically coated onto aramid fibrid via molecular self-assembly with the aid of phosphoric acid (PA) pretreatment and subsequent polyethyleneimine (PEI) functionalization. It was found that composites prepared by NFC and (PEI/SiO₂)-modified AF (after crosslinking) ((PEI/SiO₂)-AF) showed dense structure, which was mainly due to enhanced interfacial interaction between AF and NFC. Consequently, NFC/(PEI/SiO₂)-AF paper-based composites showed better tensile toughness (∼6 % elongation at break) and mechanical strength (∼36.28 MPa), in comparison with NFC/AF. More importantly, the electrical insulation performance and thermal stability of the composites were significantly improved. Accordingly, this work provides a facile approach to fabricate high-performance dielectric composites especially for high-temperature electrical insulation applications.

Keywords: Aramid fibrid; Dielectric property; Nano fibrillated cellulose; Nano-SiO(2); Paper-based composite.

MeSH terms

Cellulose / chemistry*
Filtration / methods
Hot Temperature
Nanocomposites / chemistry*
Nanoparticles / chemistry*
Nanotechnology / methods
Phosphoric Acids / chemistry
Polyethyleneimine / chemistry*
Polymers / chemistry*
Silicon Dioxide / chemistry*
Surface Properties
Tensile Strength
Vacuum

Substances

Kevlar Aramid fibers
Phosphoric Acids
Polymers
Silicon Dioxide
Polyethyleneimine
Cellulose
phosphoric acid