What question did this study set out to answer?

The study aims to characterize the biophysical properties of native pulmonary surfactant films, focusing on their mechanical stability and energy dissipation during cyclic deformation.

February 19, 2026Langmuir

Thermodynamic Insights into Native Pulmonary Surfactant Films: Elastic Compression Modulus and Energy Dissipation under Cyclic Deformation

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Authors

ÁRÁngela Johana Riaño-RiveraPontificia Universidad Javeriana NRNataly Díaz RiveraUniversidad Complutense de Madrid AAAngela Constanza Alvarez-TinjacáPontificia Universidad Javeriana

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This in vitro study examines pulmonary surfactant films' mechanical properties, indicating their stability during breathing cycles.

Key Points

The study aims to characterize the biophysical properties of native pulmonary surfactant films, focusing on their mechanical stability and energy dissipation during cyclic deformation.
Measured adsorption kinetics using standard surface balances.
Conducted cyclic compression and expansion of surfactant films under various conditions.
Calculated compressive elastic modulus and energy dissipation per cycle from experimental data.
Fit a fourth-degree polynomial to obtain compression and expansion trajectories.
The compressive elastic modulus remained constant across cycles, indicating high mechanical stability.
Hysteresis observed between compression and expansion isotherms showed energy required decreased after the first cycle.
Initial energy investment was highest due to exclusion of less stable molecules at high pressures.

Cite This Study

Riaño-Rivera et al. (2026) studied this question.

synapsesocial.com/papers/6996a869ecb39a600b3ef27f https://doi.org/10.1021/acs.langmuir.5c05577

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Thermodynamic Insights into Native Pulmonary Surfactant Films: Elastic Compression Modulus and Energy Dissipation under Cyclic Deformation

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Key Points

Cite This Study

Thermodynamic Insights into Native Pulmonary Surfactant Films: Elastic Compression Modulus and Energy Dissipation under Cyclic Deformation

Discussion

Member takes

Implication

Key Points

Cite This Study

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