Contact Creep Behavior of Polydimethylsiloxane and Influence of Load, Tip Size, and Crosslink Density

Li, Zhe; Yu, Hongwen; Wang, Q. Jane

doi:10.1007/s11249-012-0069-7

Cited by 6 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Mechanical Properties Of Cured Ip-pdms Through Nanoindentationsupporting

confidence: 88%

“…Therefore, it is concluded that IP-PDMS possesses purely viscoelastic rather than viscoplastic behavior at room temperature. That finding agrees with the behavior of conventional PDMS known for its relatively low viscoelastic behavior compared to other material that are used for DEAs [26,[30][31][32]. The obtained Young's modulus value is considerably lower than the 15.3 MPa reported on the manufacturer's website, despite using the recommended printing parameters for 2PP fabrication of the tested sample and determining both Young's moduli through nanoindentation [9].…”

Section: Mechanical Properties Of Cured Ip-pdms Through Nanoindentationsupporting

confidence: 84%

See 1 more Smart Citation

Characterization of Photocurable IP-PDMS for Soft Micro Systems Fabricated by Two-Photon Polymerization 3D Printing

Srinivasaraghavan Govindarajan,

Sikulskyi,

Ren

et al. 2023

Polymers

View full text Add to dashboard Cite

Recent developments in micro-scale additive manufacturing (AM) have opened new possibilities in state-of-the-art areas, including microelectromechanical systems (MEMS) with intrinsically soft and compliant components. While fabrication with soft materials further complicates micro-scale AM, a soft photocurable polydimethylsiloxane (PDMS) resin, IP-PDMS, has recently entered the market of two-photon polymerization (2PP) AM. To facilitate the development of microdevices with soft components through the application of 2PP technique and IP-PDMS material, this research paper presents a comprehensive material characterization of IP-PDMS. The significance of this study lies in the scarcity of existing research on this material and the thorough investigation of its properties, many of which are reported here for the first time. Particularly, for uncured IP-PDMS resin, this work evaluates a surface tension of 26.7 ± 4.2 mN/m, a contact angle with glass of 11.5 ± 0.6°, spin-coating behavior, a transmittance of more than 90% above 440 nm wavelength, and FTIR with all the properties reported for the first time. For cured IP-PDMS, novel characterizations include a small mechanical creep, a velocity-dependent friction coefficient with glass, a typical dielectric permittivity value of 2.63 ± 0.02, a high dielectric/breakdown strength for 3D-printed elastomers of up to 73.3 ± 13.3 V/µm and typical values for a spin coated elastomer of 85.7 ± 12.4 V/µm, while the measured contact angle with water of 103.7 ± 0.5°, Young’s modulus of 5.96 ± 0.2 MPa, and viscoelastic DMA mechanical characterization are compared with the previously reported values. Friction, permittivity, contact angle with water, and some of the breakdown strength measurements were performed with spin-coated cured IP-PDMS samples. Based on the performed characterization, IP-PDMS shows itself to be a promising material for micro-scale soft MEMS, including microfluidics, storage devices, and micro-scale smart material technologies.

show abstract

Section: Mechanical Properties Of Cured Ip-pdms Through Nanoindentationsupporting

confidence: 88%

Section: Mechanical Properties Of Cured Ip-pdms Through Nanoindentationsupporting

confidence: 84%

Characterization of Photocurable IP-PDMS for Soft Micro Systems Fabricated by Two-Photon Polymerization 3D Printing

Srinivasaraghavan Govindarajan,

Sikulskyi,

Ren

et al. 2023

Polymers

View full text Add to dashboard Cite

show abstract

“…The abovementioned parameters characterize the material only from the point of view of single-pressure loading, while prosthetic heart valve dysfunction occurs more often due to long-term cyclic loading [ 18 , 74 ]. Despite the absence of constant stress in the valve leaflets, it has been shown that physiological loading–unloading cycles can have a cumulative effect leading to elongation of the material or residual deformation [ 49 ] as a result of viscoelastic creep and/or hysteresis of the polymer [ 75 , 76 ]. A rapid cycle change followed by a new load limits the material’s ability to regain its original shape and results in straining [ 49 ].…”

Section: Historical Backgroundmentioning

confidence: 99%

“…Elongation is accompanied by local thinning, which then leads to increased stresses and reduced fatigue resistance [ 49 ]. Low-molecular amorphous hydrogenated carbon polymers, such as polyethylene, polyisobutylene, and PDMS, are most susceptible to irreversible elongation due to weak intermolecular bonds [ 75 , 76 , 77 ]. The introduction of functional groups would increase the molecular weight and stiffness of the chains and lead to a better creep resistance of the material and a decrease in hysteresis [ 75 , 78 ].…”

Section: Historical Backgroundmentioning

confidence: 99%

Polymeric Heart Valves Will Displace Mechanical and Tissue Heart Valves: A New Era for the Medical Devices

Резвова

Klyshnikov

Грицкевич³

et al. 2023

IJMS

View full text Add to dashboard Cite

The development of a novel artificial heart valve with outstanding durability and safety has remained a challenge since the first mechanical heart valve entered the market 65 years ago. Recent progress in high-molecular compounds opened new horizons in overcoming major drawbacks of mechanical and tissue heart valves (dysfunction and failure, tissue degradation, calcification, high immunogenic potential, and high risk of thrombosis), providing new insights into the development of an ideal artificial heart valve. Polymeric heart valves can best mimic the tissue-level mechanical behavior of the native valves. This review summarizes the evolution of polymeric heart valves and the state-of-the-art approaches to their development, fabrication, and manufacturing. The review discusses the biocompatibility and durability testing of previously investigated polymeric materials and presents the most recent developments, including the first human clinical trials of LifePolymer. New promising functional polymers, nanocomposite biomaterials, and valve designs are discussed in terms of their potential application in the development of an ideal polymeric heart valve. The superiority and inferiority of nanocomposite and hybrid materials to non-modified polymers are reported. The review proposes several concepts potentially suitable to address the above-mentioned challenges arising in the R&D of polymeric heart valves from the properties, structure, and surface of polymeric materials. Additive manufacturing, nanotechnology, anisotropy control, machine learning, and advanced modeling tools have given the green light to set new directions for polymeric heart valves.

show abstract

The Adaptive Tribological Investigation of Polycaprolactam/Graphene Nanocomposites

et al. 2016

View full text Add to dashboard Cite

Contact Creep Behavior of Polydimethylsiloxane and Influence of Load, Tip Size, and Crosslink Density

Cited by 6 publications

References 33 publications

Characterization of Photocurable IP-PDMS for Soft Micro Systems Fabricated by Two-Photon Polymerization 3D Printing

Characterization of Photocurable IP-PDMS for Soft Micro Systems Fabricated by Two-Photon Polymerization 3D Printing

Polymeric Heart Valves Will Displace Mechanical and Tissue Heart Valves: A New Era for the Medical Devices

The Adaptive Tribological Investigation of Polycaprolactam/Graphene Nanocomposites

Contact Info

Product

Resources

About