Forced capillary wetting of viscoelastic fluids
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
| Original language | English |
|---|---|
| Pages (from-to) | 555-562 |
| Journal / Publication | Journal of Colloid and Interface Science |
| Volume | 662 |
| Online published | 10 Feb 2024 |
| Publication status | Published - 15 May 2024 |
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Abstract
Hypothesis : Achieving rapid capillary wetting is highly desirable in nature and industries. Previous endeavors have primarily concentrated on passive wetting strategies through surface engineering. However, these approaches are inadequate for high-viscosity fluids due to the significant viscous resistance, especially for non-Newtonian fluids. In contrast, forced wetting emerges as a promising method to address the challenges associated with achieving rapid wetting of non-Newtonian fluids in capillaries.
Experiments : To investigate the forced wetting behavior of viscoelastic fluids in capillaries, we employ Xanthan Gum (XG) aqueous solutions as target fluids with the storage modulus significantly exceeding the loss modulus. We utilize smooth glass capillaries connected to a syringe pump to achieve high moving speeds of up to 1 m/s.
Findings : Our experiments reveal a significant distinction in the power-law exponent that governs the scaling relationship between the dynamic contact angle and velocity for viscoelastic fluids compared to Newtonian fluids. This exponent is considerably smaller and varies based on the concentration of viscoelastic fluids and the diameter of the capillaries. We suggest that the viscosity dominates the wetting dynamics of viscoelastic fluids, manifested by the contact line morphology-dependent behavior. This insight has significant implications for microfluidics and drug injectability.
© 2024 Elsevier Inc. All rights reserved
Experiments : To investigate the forced wetting behavior of viscoelastic fluids in capillaries, we employ Xanthan Gum (XG) aqueous solutions as target fluids with the storage modulus significantly exceeding the loss modulus. We utilize smooth glass capillaries connected to a syringe pump to achieve high moving speeds of up to 1 m/s.
Findings : Our experiments reveal a significant distinction in the power-law exponent that governs the scaling relationship between the dynamic contact angle and velocity for viscoelastic fluids compared to Newtonian fluids. This exponent is considerably smaller and varies based on the concentration of viscoelastic fluids and the diameter of the capillaries. We suggest that the viscosity dominates the wetting dynamics of viscoelastic fluids, manifested by the contact line morphology-dependent behavior. This insight has significant implications for microfluidics and drug injectability.
© 2024 Elsevier Inc. All rights reserved
Research Area(s)
- Wetting, Viscoelastic fluids, Capillary, Dynamic contact angle
Citation Format(s)
Forced capillary wetting of viscoelastic fluids. / Wang, Xiong; Zeng, Yijun; Yuan, Zhenyue et al.
In: Journal of Colloid and Interface Science, Vol. 662, 15.05.2024, p. 555-562.
In: Journal of Colloid and Interface Science, Vol. 662, 15.05.2024, p. 555-562.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
