The effects of solid particle containing inks on the printing quality of porous pharmaceutical structures fabricated by 3D semi-solid extrusion printing

Teoh, Xin-Yi, Zhang, Bin, Belton, Peter, Chan, Siok-Yee and Qi, Sheng ORCID: (2022) The effects of solid particle containing inks on the printing quality of porous pharmaceutical structures fabricated by 3D semi-solid extrusion printing. Pharmaceutical Research, 39 (6). 1267–1279. ISSN 0724-8741

[thumbnail of Teoh_etal_2022_PharmaceuticalResearch]
PDF (Teoh_etal_2022_PharmaceuticalResearch) - Published Version
Available under License Creative Commons Attribution.

Download (2MB) | Preview


Purpose: Semi-solid extrusion (SSE) 3D printing has potential pharmaceutical applications for producing personalised medicine. However, the effects of ink properties and drug incorporation on the quality of printed medication have not been thoroughly studied, particularly for porous geometries. This study aimed to investigate the effects of the presence of solid drug particles in SSE inks on the printing quality of porous structures. Method: The rheological behaviour of model inks of paracetamol (PCM)-hypromellose (HPMC) with different drug loadings were investigated and correlated to their printing qualities. Results: For the inks with PCM loading above the drug solubility in which suspended solid drug particulates were present, the results confirmed that PCM loading and particle size significantly affected the ink viscosities at a low shear rate. At a low shear rate, the highest viscosity was identified when the highest drug loading and the smallest PCM particles were incorporated into the inks. However, the results indicated that the SSE printing parameters and printing quality of porous structures (with less porous structural deformation) have no clear correlation with the shear viscosity data, but a strong correlation with the dynamic oscillatory rheology of the inks. Conclusion: The key rheological parameters including storage modulus, loss modulus and complex viscosity of the ink increased with increasing drug loading for the inks containing solid drug particles. However, decreasing the particle size did not have a clear effect on the oscillatory rheology of the inks which can be potentially used for optimising the SSE 3D printing quality of porous geometries.

Item Type: Article
Additional Information: Funding: This work was supported by University of East Anglia's Global Research Translation Award (ref. EP/T015411/1) funded by United Kingdom Research and Innovation (UKRI, EPSRC) with the Global Challenges Research Fund (GCRF), part of the UK's Official Development Assistance. Find out more:
Uncontrolled Keywords: 3d printing,dimensional fidelity,ink rheology,particle size,semi-solid extrusion,biotechnology,molecular medicine,pharmacology,pharmaceutical science,organic chemistry,pharmacology (medical) ,/dk/atira/pure/subjectarea/asjc/1300/1305
Faculty \ School: Faculty of Science > School of Pharmacy
Faculty of Science > School of Chemistry
UEA Research Groups: Faculty of Science > Research Groups > Pharmaceutical Materials and Soft Matter
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 24 May 2022 15:01
Last Modified: 22 Oct 2022 18:33
DOI: 10.1007/s11095-022-03299-7


Downloads per month over past year

Actions (login required)

View Item View Item