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Eddet

Manufactured by Merck Group
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EDDET is a laboratory equipment product manufactured by Merck Group. It is a device used for the detection and quantification of various chemical substances through electrochemical analysis. The core function of EDDET is to measure and analyze the electrical properties of samples, providing valuable insights for research and analytical applications.

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Lab products found in correlation

Dipropylamine, by Merck Group (3 mentions) Petmp, by Merck Group (3 mentions) Irgacure 2959, by Merck Group (1 mentions) 2 hydroxy 4 2 hydroxyethoxy 2 methylpropiophenone irgacure 2959, by Merck Group (1 mentions) 2 6 di tert butyl 4 methylphenol, by Merck Group (1 mentions) Chloroform, by Merck Group (1 mentions) 2 propanol, by Merck Group (1 mentions) Methylene chloride ch2cl2, by Merck Group (1 mentions) Sodium iodide, by Merck Group (1 mentions) Sodium thiosulfate pentahydrate, by Thermo Fisher Scientific (1 mentions) 5965 dual column testing systems, by Instron (1 mentions) Hydrogen peroxide solution, by Merck Group (1 mentions) Irgacure 651, by Merck Group (1 mentions) Lc756, by BASF (1 mentions) Toluene, by Merck Group (1 mentions)

Close spelling variants of this product

2,2′-(ethylenedioxy) diethanethiol (EDDET), (2 citations)

5 protocols using eddet

1

Photopolymerization of RM257-Based Hydrogel

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(1,4-Bis-[4-(3-acryloyloxypropyloxy) benzoyloxy]-2-methylbenzene) (RM257) (Wilshire Technologies, 95%), EDDET (Sigma-Aldrich, 95%), dipropylamine (Sigma-Aldrich, 98%), (2-hydroxyethoxy)-2-methylpropiophenone (Irgacure 2959, Sigma-Aldrich, 98%), RhB (Sigma-Aldrich), and methylene chloride (CH2Cl2) are used as received without further purification.
Wang Z., Wang Z., Zheng Y., He Q., Wang Y, & Cai S. (2020). Three-dimensional printing of functionally graded liquid crystal elastomer. Science Advances, 6(39), eabc0034.
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2

Fabrication of Photosensitive Liquid Crystal Elastomers

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All chemicals were used without treatment, as received. The LCE precursor included RM257 (monomer, >98.0%, TCI), PETMP (crosslinker, >95.0%, Sigma-Aldrich), EDDET (flexible chain extender, >95.0%, Sigma-Aldrich), dipropylamine (thermal catalyst, 99.0%, Sigma-Aldrich), 2-hydroxy-4′-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure-2959, photocatalyst, 98.0%, Sigma-Aldrich), 5CB (nematic liquid crystal dopant, 98%, Sigma-Aldrich), 2,6-di-tert-butyl-4-methylphenol (thermal inhibitor, ≥99.0%, Sigma-Aldrich), 2-(N-ethyl-4-((4-nitrophenyl)diazenyl)anilino)ethyl prop-2-enoate (Disperse Red 1 acylate, photothermal dye, 95.0%, Sigma-Aldrich) and chloroform (solvent, ≥99.0%, Sigma-Aldrich). IP-S (Nanoscribe) was used as the inactive photoresist for fabricating the passive microstructures, and 2-propanol (≥99.0%, Sigma-Aldrich) was used as the solvent for the development.
Zhang M., Pal A., Lyu X., Wu Y, & Sitti M. (2024). Artificial-goosebump-driven microactuation. Nature Materials, 23(4), 560-569.
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3

Synthesis of Liquid Crystal Monomers

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Liquid crystal monomers RM257 {1,4-bis-[4-(3-acryloyloxypropyloxy) benzoyloxy]-2-methylbenzene, 98%} used in this study were purchased from Xi’an Caijing Opto-Electrical Science and Technology Co. Ltd. Meanwhile, EDDET, dipropyl amine, butylated hydroxytoluene (BHT), (2-hydroxyethoxy)-2-methylpropiophenone (Irgacure 2959), and methylene chloride (CH2Cl2) were purchased from Sigma-Aldrich. All chemicals were used as received without further purification.
Feng X., Wang L., Xue Z., Xie C., Han J., Pei Y., Zhang Z., Guo W, & Lu B. (2024). Melt electrowriting enabled 3D liquid crystal elastomer structures for cross-scale actuators and temperature field sensors. Science Advances, 10(10), eadk3854.
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4

Photocurable Liquid Crystal Elastomer Artificial Muscle

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1,4-Bis-[4-(3-acryloyloxypropyloxy)benzoyloxy]-2-methylbenzene (RM257) (Wilshire Technologies; 95%), (2-hydroxyethoxy)-2-methylpropiophenone (HHMP; Sigma-Aldrich; 98%), 2,2′-(ethylenedioxy) diethanethiol (EDDET; Sigma-Aldrich; 95%), pentaerythritol tetrakis (3-mercaptopropionate) (PETMP; Sigma-Aldrich; 95%), dipropylamine (DPA; Sigma-Aldrich; 98%), 3% hydrogen peroxide solution (Sigma-Aldrich), sodium iodide (Sigma-Aldrich; 99%), and sodium thiosulfate pentahydrate (Fisher Scientific) were used as received without further purification. The mechanical tests were conducted using the Instron Universal Testing Machine (5965 Dual Column Testing Systems; Instron) with 1000-N loading cell. The surface temperature of LCE artificial muscle was measured by thermal imaging technique (FLIR E75-42 Advanced Thermal Imaging Camera).
He Q., Wang Z., Wang Y., Minori A., Tolley M.T, & Cai S. (2019). Electrically controlled liquid crystal elastomer–based soft tubular actuator with multimodal actuation. Science Advances, 5(10), eaax5746.
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5

Synthesis of Stretchable Chiral Liquid Crystal Elastomers

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Stretchable CLCEs were synthesized using a combination of the thiol-acrylate chain reaction and bar-coating method. The chiral reactive mesogen (LC756, BASF) and diacrylate reactive mesogen (RM257, GRANDINCHEM) were dissolved in solvent (toluene, Sigma-Aldrich) and heated at 85 °C for 5 min. After cooling the solution to room temperature, the thiol chain extender (EDDET, Sigma-Aldrich), thiol crosslinker (PETMP, Sigma-Aldrich), photoinitiator (Irgacure 651, Sigma-Aldrich), and catalyst dipropylamine (DPA, Sigma-Aldrich) were mixed and vigorously vortexed until the appropriate viscosity for bar coating was obtained. The prepared solution was then bar-coated on the conventional OHP film using an applicator with a 220 μm gap at a speed of 11 mm s-1. Finally, if the intended reflection color was apparent, photo-polymerization was conducted in an ultraviolet chamber for 5 min at an intensity of 30 mW cm-2 and a central wavelength of 365 nm (CSM1010, AUVCURE). The synthesized CLCE was easily delaminated onto the OHP film using tweezers. As a result, free-standing CLCEs with a thickness of 81 μm can be fabricated.
Nam S., Jung W., Shin J.H, & Choi S.S. (2024). Omnidirectional color wavelength tuning of stretchable chiral liquid crystal elastomers. Light, Science & Applications, 13, 114.
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