Cellulose Light Interactions - Relationship between Refractive Index and Surface Chemistry of Cellulose Nanocrystals
Typ
Examensarbete för masterexamen
Program
Publicerad
2021
Författare
Wang, Lei
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Cellulose nanocrystals (CNC, CNCs) are a new type of biomass based nanomaterials
derived from cellulose which is the most abundant biopolymer on Earth. Therefore,
there is a need to have a defined and suitable battery of analytical methods to characterize
their properties. Refractive index is an important parameter to describe
CNC properties for analytical efforts and applications as well. However, refractive
index of CNC is not conclusively reported. Therefore, this thesis is devoted in elucidating
the refractive index on CNCs in suspension.
In order to demonstrate relationship of CNCs suspension concentration and refractive
index, refractive index of diluted CNC suspensions under different concentrations
was quantified. Meanwhile, on the purpose of studying the relationship
between CNCs and surface properties, periodate oxidation and desulfation were
adopted to alter surface physico-chemical properties of CNC suspensions, and their
refractive index and refractive index increment evolution was monitored. Based on
the results of experiments, potential applications are discussed.
Beskrivning
Ämne/nyckelord
Cellulose nanocrystals , Refractive index , Periodate oxidation , Optical applications of CNCs.