Open AccessThe Stirring-assisted Liquid Exfoliation of Hexagonal Boron Nitride and the Performance of h-BN/Cellulose Aerogel
Author(s) -
Bo Yuan,
Tao Ma,
Yun Lu,
Youngjong Kang,
Chanjuan Liu
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/585/1/012175
Subject(s) - exfoliation joint , materials science , aerogel , boron nitride , crystallization , chemical engineering , microstructure , composite material , boron , cellulose , absorption (acoustics) , nanotechnology , graphene , organic chemistry , chemistry , engineering
The delamination is the focus of two-dimensional layered materials’ nano-crystallization. In this paper, two methods of stirring-assisted liquid exfoliation, DMF exfoliation and Hummers exfoliation, were utilized to prepare h-BN nanosheets. Microstructure, crystal structure and chemical structure were analyzed, which indicated that the h-BN nanosheets, with thickness of 1.4 nm and 5.4 nm respectively, were delaminated from bulk h-BN and their structure didn’t show any obvious change, in accordance with the theoretical model. The interaction of oxygen in DMF and boron in h-BN weakened the “lip to lip” interaction between neighboring layers and then nanosheets were gained under violent stirring. Due to excellent corrosion resistance, bulk h-BN couldn’t be exfoliated by strong oxidants. H+ protonated h-BN and only weakened slightly the “lip to lip” interaction. As a result, Hummers exfoliation wasn’t doing well compared with DMF exfoliation. The h-BN/nano-fibillated cellulose aerogel had a very bag surface area and the air filled in these pores, which gave it the performance of thermal insulation and oil absorption.