Trifunctional Aminoamide Cellulose Derivative and its Characterization
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Transcript of Trifunctional Aminoamide Cellulose Derivative and its Characterization
Trifunctional Aminoamide Cellulose Derivative and its
Characterization
Outline• Objectives• Problem statement and motivation of
the study• Presuppositions from Literature• Methodology
Objectives• To illustrate how to use a couple of
techniques to confirm the structural of a newly synthesized material and its intermediate.
• To illustrate how to use a couple of techniques to characterize a final product and so provide some information for applications.
Problem statement and motivation of the study
• What are dendrimers?• “A dendrimer is a
molecule with a form like the branches of a tree.”[1]
• Dendrimers can be used in pharmaceutics, genetics, catalyst chemistry and superconductor currently or potentially. [2][1] Wikipedia[2] Sand, Anders. Dendrimers and Their Technical Applicability
Cellulose-based dendrimers
Zhang, Changde et al. Biomacromolecules (2006), 7(1), 139-145.
Presuppositions from Literature• Narrow molecular weight
distribution• The most exciting physical
property of dendrimers is the variation of their intrinsic viscosities with molecular weight. [6] It is found that, when the generation increases beyond a certain point, the intrinsic viscosity begins to decline, contrary to the behavior of linear polymers (Fig.4).
[6] http://www.dendritech.com/pamam.html
Methodology • Using 1H to confirm the structural of intermediate
product:• Using FT-IR to confirm and characterize the
structural of CMCBA and CMCBADMPDA:• Using NMR to confirm and characterize the
structural of CMCBA and CMCBADMPDA: • Using TGA to Characterize the Degree of
Substitution of CMCBA and CMCBADMPDA: • Using Intrinsic Viscosity to characterize the
conformation of CMCBADMPDA:• Using GPC-LS to characterize the MW and MWD of
CMCBADMPDA:
Using 1H to confirm the structural of intermediate product:
Using FT-IR to confirm and characterize the structural
Using NMR to confirm and characterize the structural of CMCBA
and CMCBADMPDA:
Using TGA to Characterize the Degree of Substitution
Using Intrinsic Viscosity to characterize the conformation
• CMC 5.62 dL/g, • CMCDMPDA 3.57 dL/g • CMCBADMPDA 0.39 dL/g
Using GPC-LS to characterize the MW and MWD of CMCBADMPDA:
Conclusions• The author got the “right ” product.• The product is of very low viscosity,
which is suitable for drug delivery.