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Guo Y, Guo H, He D, Sun J, Chen W, Song Y, Zhou G. Development of Cyclic Tetrasiloxane Polymer as a High-Performance Dielectric and Hydrophobic Layer for Electrowetting Displays. ACS APPLIED MATERIALS & INTERFACES 2023; 15:46470-46482. [PMID: 37738528 DOI: 10.1021/acsami.3c08188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
Cyclic tetrasiloxane polymer (CTP) has recently garnered interest as a hydrophobic material with unique properties. This study aims to enhance the dielectric constant of CTP films by introducing excess Si-H groups and to explore the impact of synthesis and processing conditions on the resulting properties. The film demonstrates high hydrophobicity, with contact angles of 107° in air and 165° in n-decane, along with a notable dielectric constant of 5.1°. Furthermore, the CTP film displays reversible electrowetting behavior with low contact angle hysteresis (2°) and possesses good transparency (∼99%) and thermal stability. As such, the CTP film has significant potential as a material for the electric wetting of hydrophobic dielectric layers and may serve as a promising alternative in electrowetting applications.
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Affiliation(s)
- Yuanyuan Guo
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
- Shenzhen Guohua Optoelectronics Tech., Co., Ltd., Shenzhen 518110, China
- Academy of Shenzhen Guohua Optoelectronics, Shenzhen 518110, China
| | - Hao Guo
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
| | - Dinggui He
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
| | - Jiaqi Sun
- University of Chinese Academy of Sciences, Ningbo Institute of Materials Technology and Engineering, Ningbo 315201, China
| | - Wangqiao Chen
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
| | - Yujie Song
- University of Chinese Academy of Sciences, Ningbo Institute of Materials Technology and Engineering, Ningbo 315201, China
| | - Guofu Zhou
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
- Shenzhen Guohua Optoelectronics Tech., Co., Ltd., Shenzhen 518110, China
- Academy of Shenzhen Guohua Optoelectronics, Shenzhen 518110, China
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Talalaeva EV, Kalinina AA, Chernov EV, Khmelnitskaia AG, Obrezkova MA, Cherkaev GV, Muzafarov AM. Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers. Polymers (Basel) 2021; 14:28. [PMID: 35012055 PMCID: PMC8747541 DOI: 10.3390/polym14010028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/14/2021] [Accepted: 12/20/2021] [Indexed: 12/31/2022] Open
Abstract
This paper reports a method for the synthesis of 1,1,3,3,5,5-hexamethyl-7,7-diorganocyclotetrasiloxanes by the interaction of 1,5-disodiumoxyhexamethylsiloxane with dichlorodiorganosilanes such as methyl-, methylvinyl-, methylphenyl-, diphenyl- and diethyl dichlorosilanes. Depending on the reaction conditions, the preparative yield of the target cyclotetrasiloxanes is 55-75%. Along with mixed cyclotetrasiloxanes, the proposed method leads to the formation of polymers with regular alternation of diorganosylil and dimethylsylil units. For example, in the case of dichlorodiethylsilane, 70% content of linear poly(diethyl)dimethylsiloxanes with regular alternation of units can be achieved in the reaction product. Using 7,7-diethyl-1,1,3,3,5,5-hexamethylcyclotetrasiloxane as an example, the prospects of the mixed cycle in copolymer preparation in comparison with the copolymerization of octamethyl- and octaethylcyclotetrasiloxanes are shown.
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Key Words
- 1,1,3,3,5,5,7-heptamethyl-7-phenylcyclotetrasiloxanes
- 1,1,3,3,5,5,7-heptamethyl-7-vinylcyclotetrasiloxane
- 1,1,3,3,5,5-hexamethyl-7,7-diphenylcyclotetrasiloxane
- 1,5-disodiumoxyhexamethylsiloxane
- 7,7-diethyl-1,1,3,3,5,5-hexamethylcyclotetrasiloxane
- 7-hydro-1,1,3,3,5,5,7-heptamethylcyclotetrasiloxane
- mixed cyclosiloxanes
- poly(diethyl)(dimethyl)siloxane
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Affiliation(s)
- Evgeniya V. Talalaeva
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Aleksandra A. Kalinina
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Evgeniy V. Chernov
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Alina G. Khmelnitskaia
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Marina A. Obrezkova
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Georgii V. Cherkaev
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Aziz M. Muzafarov
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov St., 28, 119991 Moscow, Russia
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