Delayed sustained drug release from electrostatic powder coated tablets with ultrafine polymer blends

Qingliang Yang, Feng Yuan, Jiale Chen, Hang Zhou, Gensheng Yang, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

5 Citations (Scopus)


The present study aims to apply an electrostatic dry powder coating process to coat aspirin tablets with polymer blends to produce a single-layer coating film, which potentially allows an advantageous delayed sustained drug release profile. The coating formulations containing polymer blends of enteric polymer (hydroxypropyl methylcellulose phthalate or hydroxypropyl methyl cellulose acetate-succinate) and insoluble polymer (Eudragit® RL) were successfully developed and optimized. Results of scanning electron microscopy and acid resistance test demonstrated that curing conditions had a significant impact on the qualities of the produced film. Drug dissolution experiments revealed that changes in the coating level and the coating formulation with different ratios of the enteric polymer to the insoluble polymer achieved an altered and adjustable drug release profile. All of the results suggested that electrostatic powder coating technology is capable to produce a satisfactory coating film with polymer blends, allowing an advantageous functionality of delayed sustained drug release.

Original languageEnglish
Pages (from-to)496-503
Number of pages8
JournalPowder Technology
Publication statusPublished - Dec 2021
Externally publishedYes


  • Aspirin
  • Delayed sustained release
  • Electrostatic powder coating
  • Polymer blends
  • Ultrafine powders

ASJC Scopus subject areas

  • General Chemical Engineering


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