Characterization of 3<scp>D</scp> elastic porous polydimethylsiloxane (<scp>PDMS</scp>) cell scaffolds fabricated by <scp>VARTM</scp> and particle leaching

Si, Junhui; Cui, Zhixiang; Xie, Peng; Song, Li; Wang, Qianting; Liu, Qiong; Liu, Chuntai

doi:10.1002/app.42909

Cited by 26 publications

(16 citation statements)

References 24 publications

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“…A similar trend was observed in [27] for PDMS scaffolds with porosity and pore size similar to the ones of the materials produced in this study, but fabricated through vacuum-assisted resin transfer molding and leaching of NaCl porogens instead of sugar particles.…”

Section: Resultssupporting

confidence: 87%

A Flexible and Highly Sensitive Pressure Sensor Based on a PDMS Foam Coated with Graphene Nanoplatelets

Rinaldi

Tamburrano

Fortunato

et al. 2016

Sensors

163

126

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The demand for high performance multifunctional wearable devices is more and more pushing towards the development of novel low-cost, soft and flexible sensors with high sensitivity. In the present work, we describe the fabrication process and the properties of new polydimethylsiloxane (PDMS) foams loaded with multilayer graphene nanoplatelets (MLGs) for application as high sensitive piezoresistive pressure sensors. The effective DC conductivity of the produced foams is measured as a function of MLG loading. The piezoresistive response of the MLG-PDMS foam-based sensor at different strain rates is assessed through quasi-static pressure tests. The results of the experimental investigations demonstrated that sensor loaded with 0.96 wt.% of MLGs is characterized by a highly repeatable pressure-dependent conductance after a few stabilization cycles and it is suitable for detecting compressive stresses as low as 10 kPa, with a sensitivity of 0.23 kPa−1, corresponding to an applied pressure of 70 kPa. Moreover, it is estimated that the sensor is able to detect pressure variations of ~1 Pa. Therefore, the new graphene-PDMS composite foam is a lightweight cost-effective material, suitable for sensing applications in the subtle or low and medium pressure ranges.

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Section: Resultssupporting

confidence: 87%

A Flexible and Highly Sensitive Pressure Sensor Based on a PDMS Foam Coated with Graphene Nanoplatelets

Rinaldi

Tamburrano

Fortunato

et al. 2016

Sensors

163

126

View full text Add to dashboard Cite

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“…The SLS approach to construct electrically conductive segregated network in flexible polymer matrix provides an excellent module to prepare flexible electronics with programmed complex 3D structure. The conductive flexible polymers with porous structure used as piezoresistors, which were usually prepared by a template method using water‐soluble cubes or particles, was taken as an example for demonstration. We built a piezoresistor with porous structures by modeling and then 3D printed it by SLS using the CNTs wrapped TPU powder.…”

Section: Resultsmentioning

confidence: 99%

Selective Laser Sintering 3D Printing: A Way to Construct 3D Electrically Conductive Segregated Network in Polymer Matrix

Wang

Gan

et al. 2017

Macro Materials & Eng

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Selective laser sintering (SLS), which can directly turn 3D models into real objects, is employed to prepare the flexible thermoplastic polyurethane (TPU) conductor using self‐made carbon nanotubes (CNTs) wrapped TPU powders. The SLS printing, as a shear‐free and free‐flowing processing without compacting, provides a unique approach to construct conductive segregated networks of CNTs in the polymer matrix. The electrical conductivity for the SLS processed TPU/CNTs composite has a lower percolation threshold of 0.2 wt% and reaches ≈10−1 S m−1 at 1 wt% CNTs content, which is seven orders of magnitude higher than that of conventional injection‐molded TPU/CNTs composites at the same CNTs content. The 3D printed TPU/CNTs specimen can maintain good flexibility and durability, even after repeated bending for 1000 cycles, the electrical resistance can keep at a nearly constant value. The flexible conductive TPU/CNTs composite with complicated structures and shapes like porous piezoresistors can be easily obtained by this approach.

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“…However, the interconnectivity of PDMS cell scaffolds increases with increasing particle dimension. Additionally, mechanical properties such as compressive modulus and compressive strength obtained higher values for intermediate pore sizes, between 300–450 µm, in a sample universe with 150–300, 300–450, and 450–600 µm pores [ 106 ].…”

Section: Pdms Compositesmentioning

confidence: 99%

Polydimethylsiloxane Composites Characterization and Its Applications: A Review

et al. 2021

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Polydimethylsiloxane (PDMS) is one of the most promising elastomers due its remarkable proprieties such as good thermal stability, biocompatibility, corrosion resistance, flexibility, low cost, ease of use, chemically inertia, hyperplastic characteristics, and gas permeability. Thus, it can be used in areas such as microfluidic systems, biomedical devices, electronic components, membranes for filtering and pervaporation, sensors, and coatings. Although pure PDMS has low mechanical properties, such as low modulus of elasticity and strength, it can be improved by mixing the PDMS with other polymers and by adding particles or reinforcements. Fiber-reinforced PDMS has proved to be a good alternative to manufacturing flexible displays, batteries, wearable devices, tactile sensors, and energy harvesting systems. PDMS and particulates are often used in the separation of liquids from wastewater by means of porosity followed by hydrophobicity. Waxes such as beeswax and paraffin have proved to be materials capable of improving properties such as the hydrophobic, corrosion-resistant, thermal, and optical properties of PDMS. Finally, when blended with polymers such as poly (vinyl chloride-co-vinyl acetate), PDMS becomes a highly efficient alternative for membrane separation applications. However, to the best of our knowledge there are few works dedicated to the review and comparison of different PDMS composites. Hence, this review will be focused on PDMS composites, their respective applications, and properties. Generally, the combination of elastomer with fibers, particles, waxes, polymers, and others it will be discussed, with the aim of producing a review that demonstrates the wide applications of this material and how tailored characteristics can be reached for custom applications.

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Characterization of 3D elastic porous polydimethylsiloxane (PDMS) cell scaffolds fabricated by VARTM and particle leaching

Cited by 26 publications

References 24 publications

A Flexible and Highly Sensitive Pressure Sensor Based on a PDMS Foam Coated with Graphene Nanoplatelets

A Flexible and Highly Sensitive Pressure Sensor Based on a PDMS Foam Coated with Graphene Nanoplatelets

Selective Laser Sintering 3D Printing: A Way to Construct 3D Electrically Conductive Segregated Network in Polymer Matrix

Polydimethylsiloxane Composites Characterization and Its Applications: A Review

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