Related Experiment Video
Updated: May 10, 2026
11:52
Microbubble Fabrication of Concave-porosity PDMS Beads
Published on: December 15, 2015
8.3K
Rheological Investigation of Polydimethylsiloxane with Glass Beads: A Model for Compression-Stiffening Effects in
Dawid Łysik1, Joanna Mystkowska1
1Institute of Biomedical Engineering, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland.
Materials (Basel, Switzerland)
|April 24, 2025
Summary
This study developed polydimethylsiloxane (PDMS) composites with glass beads (GBs) to mimic biological tissue
Area of Science:
- Materials Science
- Biomaterials Engineering
- Rheology
Background:
- Biological soft tissues exhibit complex mechanical properties, including compression stiffening.
- These properties arise from the interplay between the extracellular matrix (ECM) and cellular components.
- Mimicking these behaviors is crucial for advancements in tissue engineering and mechanobiology.
Purpose of the Study:
- To investigate the rheological properties of polydimethylsiloxane (PDMS) composites reinforced with glass beads (GBs).
- To replicate the compression-stiffening phenomenon characteristic of biological tissues using PDMS-GB composites.
- To evaluate the influence of varying GB concentrations on the mechanical response of PDMS composites.
Main Methods:
- Fabrication of PDMS composites with 10%, 20%, and 30% GB concentrations.
- Rheological analysis to measure storage modulus (G') and apparent Young's modulus.
- Compression testing to quantify the stiffening behavior under load.
Main Results:
- Glass beads significantly enhanced the storage modulus (G') of PDMS composites.
- Stiffness increased linearly with compression, demonstrating a pronounced stiffening effect.
- The stiffening rate increased from 300 Pa/% for pure PDMS to 2035 Pa/% for 30% GB composite (a sevenfold increase).
- Apparent Young's modulus increased from 150 kPa (pure PDMS) to 380 kPa for the 30% GB composite.
Conclusions:
- PDMS-GB composites effectively reproduce the compression-stiffening behavior of biological tissues.
- The incorporation of rigid GBs enhances mechanical properties and stress redistribution in the PDMS matrix.
- These findings offer a promising biomimetic material for applications in mechanobiology and tissue engineering research.
More Related Videos
08:02Thin Film Composite Silicon Elastomers for Cell Culture and Skin Applications: Manufacturing and Characterization
Published on: July 3, 2018
10.6K
07:02Stiffness Measurement of Soft Silicone Substrates for Mechanobiology Studies Using a Widefield Fluorescence Microscope
Published on: July 3, 2018
6.8K
Related Concept Videos
01:18Residual Stresses in Bending
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
01:12Bonding and Strength of Aggregate
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
01:10Moisture Content and Bulking of Aggregate
The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption.
When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
01:23Behavior of Concrete Under Compressive Load
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
As the concrete specimen fractures under...
01:30Relation Between Tensile Strength and Compressive Strength of Concrete
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the concrete.
01:27Shrinkage in Concrete
Shrinkage in concrete is primarily due to water loss from evaporation, hydration of cement, or carbonation, leading to a reduction in volume. The volumetric contraction results in volumetric strain in concrete. However, in practice, shrinkage is measured as linear strain, which is one-third of the volumetric strain.
When concrete is still in its plastic state, it can undergo a decrease in volume by about 1% of its absolute volume. This decrease is known as plastic shrinkage. It arises either...
When concrete is still in its plastic state, it can undergo a decrease in volume by about 1% of its absolute volume. This decrease is known as plastic shrinkage. It arises either...