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Highly Stable, Functional Hairy Nanoparticles and Biopolymers from Wood Fibers: Towards Sustainable Nanotechnology

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Characterization of ethyl cellulose polymer.

Tazin Mahnaj¹, Salah U Ahmed, Fotios M Plakogiannis

¹Division of Pharmaceutical Sciences, Arnold and Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, New York , USA. tmahnaj@aol.com

Pharmaceutical Development and Technology

|August 25, 2011

Summary

This study characterized ethyl cellulose (EC) polymer properties, finding a 7% ethanol solution optimal for film preparation. The research aimed to understand EC behavior before plasticizer interactions, avoiding pre-additive commercial dispersions.

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Area of Science:

Polymer Science
Materials Science

Background:

Ethyl cellulose (EC) is a widely used polymer, but its properties can be affected by additives in commercial dispersions.
Understanding the intrinsic properties of EC polymer is crucial before incorporating plasticizers for specific applications.

Purpose of the Study:

To characterize the fundamental properties of Ethocel Std.10 FP Premium ethyl cellulose polymer.
To establish optimal conditions for preparing EC films.
To evaluate the mechanical and thermal behavior of EC films without plasticizers.

Main Methods:

Solubility, morphology, and thermal properties of EC polymer were analyzed.
Viscosity of EC solutions in ethanol was determined to find optimal film-forming concentrations.
X-ray diffraction and dynamic mechanical analysis were used to assess film structure and flexibility.

Main Results:

A 7% EC solution in ethanol was identified as optimal for film preparation.
EC polymer and EC films exhibited similar thermal behavior but differed in crystallite and amorphous region arrangements.
Unplasticized EC films demonstrated poor flexibility and low elongation.

Conclusions:

Ethocel EC polymer powder can be characterized in-house to understand its intrinsic properties.
The study provides a baseline for investigating plasticizer interactions with pure EC.
This approach avoids the confounding effects of additives present in commercial EC dispersions.