Cellulose molecule aggregates are an important component of the cell wall of timber. They have diameters at the nanometer scale, high aspect ratio, high specific surface area and rich surface groups. This article is based on "bottom-up" academic thought, and layer-by-layer separation of the wood powder is used to prepare microfibril. By chemical pretreatment, high-intensity ultrasound treatment and high-pressure homogenization treatment, cellulose nanofiber (CNF) was isolated from the cell walls of wood cellulose, and CNF was further assembled into aerogels by freeze-drying method. The results show that by combining high-intensity ultrasonication and high-pressure homogenization, uniform CNF with diameters within 1 and 3 nm and their bundles and stripes can be obtained. The aerogels possess a network structure formed by nanofibers or their interwoven sheets.
LI Qing
,
CHEN Wenshuai
,
LU Tianhong
,
GAO Jiali
,
SONG Shan
,
YU Haipeng
,
LIU Yixing
. Influence of High Pressure Homogenization on Self-aggregation and Formation of Aerogel Structure from Nanocellulose[J]. Science & Technology Review, 2014
, 32(4-5)
: 51
-55
.
DOI: 10.3981/j.issn.1000-7857.2014.h1.007
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