Polydimethylsiloxane (PDMS, Sylgard 184 silicone elastomer) and its curing agent were purchased from Dow Corning, Inc, Midland, MI, USA. Cellulose nanofiber (CNF) water suspension without modification (white paste, 1.03% solid content, purity >99%, and a length of approximately 1–5 μm and a diameter of approximately 5–100 nm) was purchased from Tianjin Woodelf Biotechnology Co. Ltd, Tianjin, China. Softwood bleached sulphate fiber pulp, which was made from spruce wood, was used as source material to prepare CNF by mechanical milling using a supermasscolloider (Masuko sangyo Co., LTD., Kawaguchi/Saitama, Japan). 1H,1H,2H,2H-Perfluorooctyltrichlorosilane (FOTS, CF3(CF2)5(CH2)2SiCl3, 97%) was purchased from Sigma Aldrich, China. Both anhydrous ethanol (>99.5%) and toluene (>99.8%, AR) were purchased from Alfa Aesar, China. Small pieces of wood (dimensions 4.5 cm × 2.5 cm × 1.5 cm) were used as substrates.
Pdms sylgard 184 silicone elastomer
Manufactured by Dow
Sourced in United States
PDMS (Sylgard 184 Silicone Elastomer) is a two-component silicone-based polymer system used for creating flexible, transparent, and durable elastomeric materials. It consists of a base component and a curing agent that, when mixed and cured, form a cross-linked silicone polymer. PDMS has a wide range of physical and chemical properties that make it suitable for various laboratory and industrial applications.
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Lab products found in correlation
Toluene, by Thermo Fisher Scientific (1 mentions)
N n methylenebisacrylamide mbaa, by Merck Group (1 mentions)
2 butanone, by Merck Group (1 mentions)
Glycerol, by Merck Group (1 mentions)
Zein from maize, by Merck Group (1 mentions)
Clarus 600, by PerkinElmer (1 mentions)
Tobramycin, by Thermo Fisher Scientific (1 mentions)
Human α thrombin, by Prolytix (1 mentions)
7 protocols using pdms sylgard 184 silicone elastomer
1
PDMS-CNF Composite Hydrophobic Coating
2
Conductive Polymer Composite Fabrication
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PEDOT:PSS aqueous suspension (Clevios PH1000) was purchased from Heraeus Electronic Material (USA). Glycerol, dodecylbenzene sulfonic acid (DBSA), sodium chloride, (3‐glycidyloxypropyl) trimethoxysilane (GOPS), cetyltrimethylammonium bromide (CTAB), ammonium persulfide (APS), acrylamide (AAm), N′‐Tetramethylethylenediamine (TEMED) and N,N′‐methylenebisacrylamide (MBAA) were purchased from Sigma‐Aldrich Co (USA). The liquid metal, eutectic gallium‐indium (EGaIn), was supplied by Flystone Electronics Co. (Zhejiang, China). PDMS (Sylgard 184 silicone elastomer) was purchased from Dow Corning (USA). Styrene‐butadiene rubber (SBR) was provided by Baling Petrochemical Co (China). Ethylene‐vinyl acetate copolymer (EVA50, 50% vinyl acetate) was purchased from Yanshan Petrochemical Co. (China). Polyether‐based TPU was provided by Covestro AG. (Desmopan 9385) and BASF Co. (Elastollan 1195 A). The semi‐permeable TPU film was purchased from 3M Co. (The United States). Poly(styrene‐ethylene‐butylene‐styrene) (SEBS) was provided by Sigma‐Aldrich Co. (The United States). N, N‐dimethylformamide (DMF), tetrahydrofuran (THF), and toluene were obtained from Aladdin Co. (Shanghai, China). The silver paste was purchased from Voltera Co. (USA). The water‐soluble tape (HD 5414) was provided by 3M Co. (USA).
3
Nanomaterial-based Piezoelectric Harvesters
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Parylene-C was provided by Specialty Coating Systems in form of dimer powders. PDMS (Sylgard 184 Silicone Elastomer) was supplied by Dow Corning Corporation in two compounds: a viscous uncured pre-polymer and a curing agent. PMMA 950 in Anisole e-beam resist (anisole 80–100%, PMMA 1–20%) was purchased from MicroChem Corp. Granular PVDF powder (average Mw ~ 534,000 by GPC) and 2-butanone (MEK) solvent were supplied by Sigma Aldrich.
The piezoelectric devices employed in the present work were grouped into two categories: (i) AlN-based, and (ii) PVDF-based seaweed-shape transducers. The AlN flags were made using kapton HN (by Dupont in the form of 25 µm-thick foils) as substrate for thin film deposition. The commercial PVDF foils of the second groups of harvesters were provided by TE Connectivity’s Measurement Specialties (MEAS).
AISI304 steel samples were selected as substrates for corrosion tests and were provided by RS Components.
The piezoelectric devices employed in the present work were grouped into two categories: (i) AlN-based, and (ii) PVDF-based seaweed-shape transducers. The AlN flags were made using kapton HN (by Dupont in the form of 25 µm-thick foils) as substrate for thin film deposition. The commercial PVDF foils of the second groups of harvesters were provided by TE Connectivity’s Measurement Specialties (MEAS).
AISI304 steel samples were selected as substrates for corrosion tests and were provided by RS Components.
4
Biodegradable PDMS-Zein Composite Fabrication
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Polydimethylsiloxane (PDMS)—Sylgard® 184 Silicone Elastomer was obtained from Dow Corning (Midland, MI, USA). Zein from maize (CAS Number: 9010-66-6), presenting a molecular weight of 22–24 kDa, was supplied by Sigma-Aldrich (Saint Louis, MO, USA). Glycerol (anhydrous extra pure) was purchased from Merck (Darmstadt, Germany). The licorice EO (Glycyrrhiza glabra L.) (Leguminosae/Fabaceae) was obtained from Best Formula Industries (BF1, Kuala Lumpur, Malaysia). The EO (Pure Essential) was isolated from trunks of the plant by steam distillation and was stored at −20 °C in the dark until analysis and further use. The purity of the EO was tested and its quality ensured to be consistent with the standards described in the European Pharmacopoeia, being suitable to be used in products for human consumption. The chemical composition, analyzed by Gas Chromatography coupled to Mass Spectrometry (GC-MS, Perkin Elmer Clarus 600, Shelton, CT, USA), and the bioactivities, namely antioxidant ant antibacterial, of this EO were previously published [13 (link)].
5
Biosensing Platform for Therapeutic Monitoring
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All reagents were purchased from Sigma-Aldrich (MO, USA) unless stated. Tris(2-carboxyethyl)phosphine hydrochloride (TCEP) was purchased from TCI America Inc. (OR, USA). The human α-thrombin was purchased from Haematologic Technologies Inc. (VT, USA). Tobramycin (900 μg/mg) and phosphate-buffered saline (PBS; 1×, pH 7.2; Gibco) were purchased from Thermo Fisher Scientific (MA, USA). Tobramycin and vancomycin aptamers were purchased from Integrated DNA Technologies Inc. (IA, USA), and doxorubicin and thrombin aptamers were purchased from Biosearch Technologies Inc. (CA, USA). PDMS (Sylgard 184 Silicone Elastomer) was purchased from Dow Corning (MI, USA). Gold-plated acupuncture needles were purchased from Suzhou Acupuncture and Moxibustion Appliance Co. Ltd. (Suzhou, China). The lancets (30 gauge) were purchased from CVS Pharmacy (RI, USA). Disc gold electrodes (diameter: 1.6 mm) were purchased from Bioanalytical Systems Inc. (IN, USA). Ag/AgCl ink was purchased from Ercon Incorporated (MA, USA).
6
PDMS Fabrication for Flexible Devices
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As PDMS is the primary material employed in our platform, we mixed a PDMS Sylgard 184 Silicone elastomer (Dow Corning Corp., Midland, MI, USA) base and curing agent at a 10:1 ratio, respectively, throughout this study. An increased hardness/stiffness can benefit some parts of the assembly (e.g., the lid or stiff sensor). However, we avoided the fabrication of PDMS parts using an excessive crosslinking curing agent for a couple of reasons. First, the elasticity is directly affected by the amount of crosslinking agent, and maintaining elasticity supports applications where material bending is involved [28 ]. Second, PDMS fabrication using the manufacturer protocol (10:1) mixing ratio is highly elastic rather than viscoelastic [29 (link)]. Third, flexible PDMS with excess base polymer is preferred for movable structures to obtain actuation without hysteresis [30 (link)]. Finally, this approach was adopted to avoid the potential of excess crosslinking agent leaching out into cell culture [31 (link)].
7
Polystyrene Particle Synthesis and PDMS Sensors
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Submicrometer particles from linear polystyrene have been synthesized in the Institute of Fine Chemical Technologies RTU MIREA [42 (link)]. The sensor matrix has been developed from PDMS “Sylgard 184 silicone elastomer” (Dow Corning, USA). The following organic solvents have been used as analytes: benzene “pur.” and toluene “p.a.” (Reakhim, Russia); p-xylene “pur.”, n-pentane, “puriss.”, n-heptane “puriss. spec.” and n-decane “pur.” (EKOS-1, Russia); n-octane “pur.” (Acros Organics, Belgium/US).
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