|Title:||Cellulose Nanocrystal Isolation from Hardwood Pulp using Various Hydrolysis Conditions
Cellulose Nanocrystal Isolation from Hardwood Pulp using Various Hydrolysis Conditions
Lin, Kuan Hsuan
Lin, Kuan Hsuan
|Keywords:||Cellulose nanocrystals | Hardwood pulp | Sulfuric acid hydrolysis||Issue Date:||16-Oct-2019||Journal Volume:||24||Journal Issue:||20||Source:||Molecules||Abstract:||
© 2019 by the authors. To expand the application field of the pulping industry, this study conducted a series of sample preparations for processing cellulose nanocrystals (CNCs) from a dry hardwood pulp to achieve optimal sulfuric acid hydrolysis. The properties of laboratory-prepared pulp CNCs (P-CNCs) were investigated with different preparation conditions including sulfuric acid concentrations, hydrolysis temperatures, and hydrolysis durations. Results showed a gradient of color changes observed with the increase of hydrolysis duration and temperature. Under certain conditions, the derived P-CNCs exhibited nanoscale dimensions, detected by transmission electron microscopy, and a crystallinity index similar to commercial products. In addition, the surface sulfate groups were assumed to be contributed by sulfuric acid hydrolysis. However, a high acid concentration and long hydrolysis processing duration introduced more sulfate groups on the derived P-CNCs, which may have acted as flame retardants and, thus, increased the amount of char residue.
|Appears in Collections:||森林環境暨資源學系|
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