Sylgard® Cure Inhibition Characterization

Ortiz‐Acosta, Denisse

doi:10.2172/1053123

Cited by 15 publications

(24 citation statements)

References 1 publication

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“…The polydimethylsiloxane layer was prepared from a Dow Sylgard ® 184 system. A base, containing >60 wt.% PDMS [14], was mixed in a 10:1 ratio with a cross-linker. Then, the mixture was degassed, transferred into molds, and left for cross-linking for 48 h at room temperature.…”

Section: Methodsmentioning

confidence: 99%

Biomaterial Embedding Process for Ceramic–Polymer Microfluidic Sensors

Nawrot

Malecha

2020

Sensors

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One of the major issues in microfluidic biosensors is biolayer deposition. Typical manufacturing processes, such as firing of ceramics and anodic bonding of silicon and glass, involve exposure to high temperatures, which any biomaterial is very vulnerable to. Therefore, current methods are based on deposition from liquid, for example, chemical bath deposition (CBD) and electrodeposition (ED). However, such approaches are not suitable for many biomaterials. This problem was partially resolved by introduction of ceramic–polymer bonding using plasma treatment. This method introduces an approximately 15-min-long window for biomodification between plasma activation and sealing the system with a polymer cap. Unfortunately, some biochemical processes are rather slow, and this time is not sufficient for the proper attachment of a biomaterial to the surface. Therefore, a novel method, based on plasma activation after biomodification, is introduced. Crucially, the discharge occurs selectively; otherwise, it would etch the biomaterial. Difficulties in manufacturing ceramic biosensors could be overcome by selective surface modification using plasma treatment and bonding to polymer. The area of plasma modification was investigated through contact-angle measurements and Fourier-transform infrared (FTIR) analyses. A sample structure was manufactured in order to prove the concept. The results show that the method is viable.

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Section: Methodsmentioning

confidence: 99%

Biomaterial Embedding Process for Ceramic–Polymer Microfluidic Sensors

Nawrot

Malecha

2020

Sensors

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“…The elastomer kit received from Dow Corning comprised of two fluids. Part A is the resin consisting of vinyl-terminated siloxane oligomers and Part B is the curing agent consisting of tetra (trimethylsiloxy) silane, in the presence of a catalyst such as Karsted's catalyst or H2PtCl6 through a hydrosilylation mechanism [18]. Appropriate amounts of bamboo fibers and sugar were added to the PDMS resin/curing agent mixture as stated in Table 1.…”

Section: Bamboo Fiber-reinforced Pdms Foammentioning

confidence: 99%

Preparation and Behavior of Bamboo Fiber-Reinforced Polydimethylsiloxane Composite Foams during Compression

Zubaidah

Norfatriah

Amali

et al. 2018

Fibers

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This study investigates the mechanical properties of bamboo fiber-reinforced polydimethylsiloxane (BF-PDMS) foams with up to 3.4% (by mass) fiber during compression. Pristine PDMS foams and BF-PDMS composite foams were fabricated using a sugar leaching method. Compression test results of pristine PDMS and BF-PDMS composite foams display plateau and densification regions. Predictions of a modified phenomenological foam (PF) model based on Maxwell and Kelvin–Voight models are in good agreement with compression test results. Stiffness coefficients were extracted by fitting results of compression tests to the modified PF model. Spring and densification coefficients of BF-PDMS composite foams are 2.5- and 15-fold greater than those of pristine PDMS foams, respectively. Strains corresponding to onset of densification computed using extracted coefficients were 35% and 25% for pristine PDMS foams and BF-PDMS composite foams, respectively. Compressing foams at 6.0 and 0.5 mm/min results in highest and lowest compressive stress, respectively. Insights from this study are useful in many areas such as environmental protection, pressure sensing, and energy where PDMS composite foams will find applications.

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“…Thus the maximum suitable proportion of particles seems to be linked to the average particle diameter. The qualitative method used for analyzing the CSR curing process and for determining cure inhibition was an examination whether the final product (after heating in an oven) was tacky or not [21]. The polymerization of PDMS/PGC, PDMS/ABN, and PDMS/PVP-DVB materials was validated, and sorption properties of these materials were tested after-ward in batch experiments.…”

Section: Polymerization Of Composite Silicone Rubber With Different Smentioning

confidence: 99%

“…The PDMS/MCX and PDMS/MAX composite materials were rejected because of incomplete curing (presence of viscous residues). Oasis R MCX and Oasis R MAX respectively contained sulfonated and amine groups known to poison platinum catalysts by irreversible formation of complexes, shutting down the polymerization reaction permanently [21]. Other PDMS curing reactions, such as polymerization by condensation, could be tested to circumvent this incompatibility.…”

Section: Polymerization Of Composite Silicone Rubber With Different Smentioning

confidence: 99%

Combination of sorption properties of polydimethylsiloxane and solid-phase extraction sorbents in a single composite material for the passive sampling of polar and apolar pesticides in water

Martín¹,

Margoum²,

Coquery³

et al. 2016

J. Sep. Science

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Passive sampling techniques have been developed as an alternative method for in situ integrative monitoring of trace levels of neutral pesticides in environmental waters. The objective of this work was to develop a new receiving phase for pesticides with a wide range of polarities in a single step. We describe the development of three new composite silicone rubbers, combining polydimethylsiloxane mechanical and sorption properties with solid-phase extraction sorbents, prepared as a receiving phase for passive sampling. A composite silicone rubber composed of polydimethylsiloxane/poly(divinylbenzene-co-N-vinylpyrrolidone) was selected by batch experiments for its high sorption properties for pesticides with octanol-water partition coefficients ranging from 2.3 to 5.5. We named this composite material "Polar/Apolar Composite Silicone Rubber". A structural study by scanning electron microscopy confirmed the homogeneous dispersion of the sorbent particles and the encapsulation of particles within the polydimethylsiloxane matrix. We also demonstrate that this composite material is resistant to common solvents used for the back-extraction of analytes and has a maximal resistance temperature of 350°C. Therefore, the characteristics of the "Polar/Apolar Composite Silicone Rubber" meet most of the criteria for use as a receiving phase for the passive sampling of pesticides.

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Sylgard® Cure Inhibition Characterization

Cited by 15 publications

References 1 publication

Biomaterial Embedding Process for Ceramic–Polymer Microfluidic Sensors

Biomaterial Embedding Process for Ceramic–Polymer Microfluidic Sensors

Preparation and Behavior of Bamboo Fiber-Reinforced Polydimethylsiloxane Composite Foams during Compression

Combination of sorption properties of polydimethylsiloxane and solid-phase extraction sorbents in a single composite material for the passive sampling of polar and apolar pesticides in water

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