Abstract
The objective of this study was to propose a new coating film for biodegradable polymers and environmentally friendly processing. Here, a novel implementation of solid lipid nanoparticles (SLN) into a biodegradable alginate (ALG) film composition created a new gastric-resistant film for an enteric-release tablet. Experiments were performed on a water-soluble substance (thiamine nitrate) to characterize the effects of SLN upon the addition of the ALG coating formulation. The coated tablets or cast films were characterized based on delayed-release properties, surface morphology, moisture resistance, and chemical interactions. The SLN-ALG film displayed gastric-resistant properties (< 10% drug substance dissolved at pH 1.2) and rapid disintegration in the intestinal medium (pH 6.8). Morphological analysis using a microscope and scanning electron microscope confirmed the uniformity and smoothness of the SLN-ALG film, which improved the mechanical properties of the film. Fourier transform infrared spectroscopy and differential scanning calorimetry indicated that SLN contributed to the formation of the film, which maintained free carboxylic groups, making the SLN-ALG film a higher acid resistance, but soluble in pH 6.8 buffer. These promising results suggest a novel nanotechnology-based coating formulation for various enteric-release dosage forms. Because of their biodegradability, the proposed ingredients and processes are safe and environment-friendly.
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The author team appreciates the support from colleagues and partners for analyzing the results of digital camera, image, and physical-mechanical tests.
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Bao Tran: conceptualization; investigation; methodology; data curation; writing—original draft. Chien Nguyen: conceptualization, supervision, writing, review and editing, and project administration. Khanh-Ly Tran: investigation and data curation. Phuong Nguyen: investigation and supervision. Thach-Tung Nguyen: investigation.
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Tran, B.N., Tran, KL., Nguyen, TT. et al. A Novel Alginate Film Based on Nanocoating Approach for Enteric-Release Tablets. AAPS PharmSciTech 24, 99 (2023). https://doi.org/10.1208/s12249-023-02557-0
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DOI: https://doi.org/10.1208/s12249-023-02557-0