Stability of Suspensions of α-Chitin Nanocrystals Obtained by TEMPO Oxidation

Istomina, A.P.; Богданова, О. И.; Streltsov, D. R.; Чвалун, С. Н.

doi:10.1134/s0965545x19050080

Cited by 5 publications

(1 citation statement)

References 39 publications

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“…In recent years, several methods have been investigated for the isolation of CNC and ChNC, they are, chemical acid hydrolysis (Lahiji et al, 2010;Li-rong et al, 2011;Wang et al, 2012;Yu et al, 2013;Liu et al, 2018;Xie et al, 2019), enzymatic hydrolysis Xu et al, 2013;Anderson et al, 2014), mechanical refining (Amin et al, 2015;Y. Li et al, 2016), ionic liquid treatment (Tan et al, 2015), subcritical water hydrolysis (Novo et al, 2016), oxidation method (Fan, Saito and Isogai, 2008;Visanko et al, 2014;Istomina et al, 2019) and combined processes (Li, Wang and Liu, 2011;Phanthong et al, 2015;An et al, 2016;Jiang et al, 2018;Seta et al, 2020). Among those processes, acid hydrolysis is the most commonly used to produce nanomaterials, especially ChNC (Moon et al, 2011;Zeng et al, 2012) because of their simplicity, high crystallinity product, and high yield ability.…”

Section: The Structure and Extraction Methods Of Cellulose And Chitin Nanocrystalsmentioning

confidence: 99%

Solid Acid Hydrolysis for Isolation of Cellulose Nanocrystals and Chitin Nanocrystals – A mini review

Seta¹,

Liu

2021

J selulosa

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Cellulose and chitin are two of the most abundant biopolymer on earth, have been attracted a lot of interest from many researchers, especially related to their nanoparticles form. Recently the method to extract them into nanoscale materials mostly by mineral or liquid acid hydrolysis, such as sulfuric and hydrochloric acid. Despite their high yield production, many disadvantages are produced by their use as a hydrolysis catalyst, such as low thermal stability and are difficult to be functionalized due to the presence of sulfate groups, tendency to be aggregated due to the bare surface charge density, the potential excessive degradation of cellulose; and large amounts of effluent will be produced due to the neutralization stage and corrosion hazards to the equipment and environment. To overcome the drawback of those acids, solid acid can be used to produce cellulose (CNC) and chitin nanocrystals (ChNC). Their ability to recrystallize and recycle makes them more environmentally friendly, furthermore, most of the acid can do esterification on the surface of cellulose and chitin. The purpose of this paper is to provide a critical review of recent progress related to solid acid hydrolysis since they have interesting characterization even some of their attribute is better than the conventional method.

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