Abstract
A swelling measurement device was designed to observe the axial swelling direction of a matrix containing various types of hydrophilic cellulose derivatives (methylcellulose, hydroxypropylmethylcellulose and hydroxypropylcellulose). The effect of indomethacin and lactose on the swelling properties was also studied. The maximum swelling index and the apparent diffusion coefficient of water in the matrix, calculated from the swelling data, were used to describe the swelling properties of the matrix, reflecting the matrix integrity. The results showed that hydroxypropylcellulose produced a matrix with a high integrity. Indomethacin and lactose changed the swelling properties of the hydrophilic cellulose matrices in this study.
Published Version
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